ML19312C252
| ML19312C252 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 12/31/1976 |
| From: | Parker W DUKE POWER CO. |
| To: | |
| References | |
| NUDOCS 7912120591 | |
| Download: ML19312C252 (1000) | |
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! DUKE POWER COMPANY STEAM PRODUCTION DEPARTMENT 4
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l OCONEE NUCLEAR STATION - ANNUAL OPERATING REPORT
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1976
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VOLUME 1 1
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DUKE POWER COMPANY STEAM PRODUCTION DEPARTMENT
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OCONEE NUCLEAR STATION ANNUAL OPERATING REPORT 1976 ^ VOLUME 1 3
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DUIm POWER COMPANY
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GENEILtL OFFICES '#" ""' 3T 3 .N 422 SouTM CHURCH STREET CILinLo rrE, N. C. 2S242 March 30, 1977 Mr. Norman C. Moseley, Director , U. S. Nuclear Regulatory Commission Suite 818 230 Peachtree Street, Northwest Atlanta, Georgia 30303 Re: Oconee Nuclear Station Docket Nos. 50-269, -270, -287
Dear Mr. Moseley:
Please find enclosed forty (40) copies of the Oconee Nuclear Station Annual Report for the period ending December 31, 1976. This report , is submitted pursuant to the Oconee Nuclear Station Technical Specifi- ' cation 6.6.1.2, Annual Operating Report, and the Non-Radiological Environmental Specifications, Appendix B to Operating Licenses DPR-38, DPR-47, and DPR-55. , Ver truly yours G z L
% .- U. u st iiilliam O. Parker, Jr. J Vice President LJB:jm Enclosures cc: Dr. Era..est Volgenau, Director
- Of fice of Inspection and Enforcement l
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D ul'E POWER C O M P A tl Y OCONEE NUCLEAR STATION
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#dUALREPORT PERIOD EnDino DECEMBER 3L 1976
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TABLE OF CONTENTS VOLUME I
- 1. Non-Radiological Environmental Surveillance Report
- 1. Introduction 1.1 Station Cooling Water Systems Thermal Limits 1.2 Chemical Discharge Limits
> 1.3 General Aquatic Surveillance 1.3.1 Water Quality ~ 1.3.2 Fish-Population Dynamics and Reproduction 1.3.3 Periphyton 1.3.4 Phytoplankton-Zooplankton Receiving Water Study 1.3.5 Benthos l 1.4 Fish Impingement on Intake Screens and Entrainment of Fish Eggs and Larvae
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" 1.5 Phytoplankton-Zooplankton Entrainment Mortality Study I 1.6 Plume Mapping for Temperature and Dissolved Oxygen I
1.7 Gas-Bubble Disease Study II. Annual Operating Report Introduction
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- 2. l 2.1 Report for January,1976
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2.2 Report for February, 1976 ! 2.3 Report for March, 1976 ' 2.4 Report for April, 1976 ' 2.5 Report for May, 1976 2.6 Report for June, 1976 2.7 Report for July, 1976
- 2.8 Report for August, 1976 2.9 Report for September, 19'6 2.10 Report for October, 197o
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2.11 Report for November, 1976-2.12 Report for December, 1976 2.13 Environmental Monitoring 2.14 Personnel Exposure and Monitoring , 2.15 Fuel Examinations 4 1 ), .
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- TABLE OF CONTENTS VOLUME II i
Appendix A - Tabulated Water Quality Data Lakes Keowee and Hartwell ] Appendix B - Tabulated Biological Data
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VOLUME III Appendix C - SERI Highlights of Activities for Fiscal Year 1976 Appendix D - SERI Report of Progress and Evaluation for Fiscal Year 1977 and Excerpts from Proposed Annual Work Plan for Fiscal Year 1978 Appendix E - Oconee Nuclear Station . Plume Mapping Studies i Appendix F - Operational Environmental Rad'., activity Monitoring Data 1 r 4 a i i e
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_ _ , _ , . - _ _ _ _ _ _ _ _ _ _ - - - - _ _ _ - - - - G e SECTION I NON-RADIOLOCICAL ENVIRONMENTAL SURVEILLANCE REPORT , e
- 1. INTRODUCTION This section of the Annual Report is submitted pursuant to the Non-Radiclogical Environmental Technical Specifications, Appendix B, to Operating Licenses DPR-38, DPR-47, and DPR-55. This section summarizes the Non-Radiological Envi-ronmental Surveillance Program for Oconee Nuclear Station from January 1 through December 31, 1976.
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. ! 1.1 STATION. COOLING WATER SYSTEMS THERMAL LIMITS Specif! cation: A. The cooling water effluent temperature at the discharge shall not exceed 100 F for a time period in excess of two hours. In the event of the once-in-20 years com-bination of extreme natural conditions the station's generating capacity shall be limited as necessary to keep the discharge temperature from exceeding 100 F unless there is a serious need for the lost power. A serious need for lost power is defined here as a
' condition which would result in voltage reductions or load shedding (except contracted interruptable loads). Under these circumstances, the. licensee
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- shall notify AEC/ DOL immediately by telephone and
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the discharge temperature shall not be allowed to exceed 103 F. B. Temperature rises from the condenser intake to the discharge shall not exceed 28 F. Further, the temperature rise should not exceed 22 F when the , inlet temperature is greater than 68 F. C. Normal station operations shall be programmed so that effluent temperatures shall not decrease more than 6 F per hour during the winter and 10 F per hour during the spring, summer, and fall (Duke j Power Company, 1973a). s I. INTRODUCTION
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The noted specifications were established to minimize the effects of
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thermal discharges on aquatic life in the vicinity of Oconee Nuclear Station. -The limits on station discharge temperature, temperature rise across the condensers, and rate of decrease of the dischcrge temperature permit sufficient operational flexibility to allow for the starting or shutdown of a circulation water pump during unit load changes. Under
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normal operation, station procedures incorporate the programming of load changes to minimize the resulting transient thermal change. II. METHODS AND MATERIALS ' The ONS daily average Condenser Cooling Water (CCW) intake and discharge temperatures and flow rates for the period January 1 through December 31, 1976 are presented in Table 1.1-1 and Figure 1.1-1. This data represents j a summary of the Environmental Monitoring Report-(EMR) computer program. , The EMR computes the station flow rate, inlet temperature and outlet i temperature continuously (intervals less than one minute) and prints , hourly maximum,Eminimum, and average values. During periods of equip-i ment failure, representative data readings are recorded manually. 1 4 1.1-1 ONS 12/76 1 e e '"e
III. RESULTS AND DISCUSSION With respect to Specification A, Table 1.1-1 and Figure 1.1-1 show that the maximum allowable discharge temperature of 100.0 F (37.8 C) was not exceeded at any time during the year 1976. The maximum daily average discharge temperature of 92.1 F (33.4 C) occurred on September 23, 24, 25, 27 and 28, and the maximum hourly average discharge temperature of 95.1 F (35.1 C) occurred on September 10. The daily average inlet temperature ranged from a low of 48.6 F (9.2 C) on February 8 to a high of 76.9 F (25.0 C) on September 12 and 13. With respect to Specification B, the temperature rise (AT) in the CCW system did not exceed 28.0 F (15.6 C ) nor did it exceed 22.0 F (12.2 C ) , when the inlet temperature was greater than 68.0 F (20.0 C) . The maximum hourly average AT when the inlet temperature was greater than 68.0 F (20.0 C) was 18.7 F (10.4 C ) which occurred on September 10. When the inlet temperature was less than 68.0 F (20.0 C) the maximum hourly average AT was 24.6 Fo (13.7 C ) which occurred on January 29. With respect to Specification C, the maximum allowable temperature decrease was not exceeded during normal station operations or any other time. The maximum hourly temperature decrease at the CCW outlet for the winter period was 4.7 F (2.6 C ) which occurred on January 22 when Unit 1 tripped. The maximum hourly temperature decrease for the remaining seasons of the year was 7.4 Fo (4.1 Co) which occurred on June 8 when again Unit 1 tripped. IV.
SUMMARY
AND CONCLUSIONS The operation of ONS in 1976 was well within the thermal limits for maximum discharge temperature, maximum temperature rise acrcss the condensers, and the maximum hourly decrease in discharge temperature. LITERATURE CITED Duke Power Company. 1973a. Appendix B to Facility Operating License Nos. DPR-38, DPR-47, and DPR-55, Technical Specifications for the Oconee Nuclear Station Units 1, 2, and 3, Duke Power Company. U. S. Atomic Energy Commirsion, Docket Nos. 50-269, 50-270, and 50-287 (revised August 19, 1974, NRC), Washington, D. C. 1.1-2 ONS 12/76
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Table 1.1-1 CCW TEMPERATURE MONITGRING OCONEE NUCLEAR STATION January, 1976 DAY FLOW INLET TEMP. OUTLET TEMP. AT x103 GPM M3 / min OF OC OF OC FO ""~ CO 1 1704.5 (6451.5) 55.3 (13.0) 73.3 (23.0) 18.0 (10.0) 2 1700.7 (6437.1) 54.5 (12.5) 71.8 (22.1) 17.3 ( 9.6) 3 1735.7 (6569.6) 54.3 (12.4) 67.8 (19.9) 13.5 ( 7.5) 4 1833.8 (6940.9) 53.9 (12.2) 70.0 (21.1) 16.1 ( 8.9) 5 1831.8 (6933.4) 53.3 (11.8) 70.9 (21.6) 17.6 ( 9.8) 6 1835.3 (6946.6) 53.0 (11.6) 71.3 (21.8) 18.3 (10.2) . 7 1840.5 (6966.3) 52.9 (11.6) 71.2 (21.8) 18.3 (10.2) 8 1838.6 (6959.1) 52.8 (11.6) 71.1 (21.7) 18.3 (10.1) 9 1748.2 (6616.9) 52.5 (11.4) 71.6 (22.0) 19.1 (10.6) 10 1696.0 (6419.4) 52.3 (11.3) 71.2 (21.8) 18.9 (10.5)
, 11 1544.1 (5844.4) 51.9 (11.0) 67.4 (19.6) 15.5 ( 8.6) 12 1489.8 (5638.9) 51.9 (11.0) 72.3 (22.4) 20.4 (11.4) 13 1374.2 (5201.3) 51.6 (10.9) 74.6 (23.6) 23.0 (12.7) 14 1583.2 (5992.4) 51.4 (10.8) 72.4 (22.4) 21.0 (11.6) 15 1530.4 (5792.6) 51.2 (10.6) 72.8 (22.6) 21.6 (12.0) 16 1535.9 (5813.4) 50.9 (10,5) 72.1 (22.3) 21.2 (11.8) 17 1539.9 (5828.5) 50.7 (10.4) 72.2 (22.3) 21.5 (11.9) 18 1537.3 (5818.7) 50.6 (10.4) 71.7 (22.0) 21.1 (11.6) 19 1537.7 (5820.2) 50.4 (10.2) 71.8 (22.1) 21.4 (11.9) 20 1540.1 (5829.3) 50.4 (10.2) 71.9 (22.2) 21.5 (12.0) 21 1540.9 (5832.3) 50.8 (10.4) 72.3 (22.4) 21.5 (12.0)
' 22 1535.5 (5811.9) 50.7 (10.4) 66.5 (19.2) 15.8 ( 8.8) 23 1532.1 (5799.0) 50.4 (10.2) 64.3 (18.0) 13.9 ( 7.8) 24 1531.7 (5797.5) 50.1 (10.0) 61.8 25 1532.4 (16.6) 11.7 ( 6.6) (5800.1) 49.7 ( 9,8) 65.8 (18.8) 16.1 ( 9.0) 26 1532.4 (5800.1) 49.4 ( 9.6) 70.5 (21.4) 21.1 (11.8) 27 1527.5 (5781.6) 49.2 ( 9.6) 70.6 (21.4) 21.4 (11.8) 28 1497.6 (5668.4) 48.9 ( 9.4) 71.0 22.1 (21.6) (12.2) 29 1423.7 (5388.7) 48.9 ( 9.4) 72.3 (22.4) 23.4 (13.0) 30 1539.6 (5827.4) 49.0 ( 9.4) 69.4 20.4 (20.8) (11.4) 31 1537.9 (5821.0) 49.0 ( 9.4) 68.2 (20.1) 19.2 (10.7) AVG. AVG. AVG. AVG. 1603.5 51.5 70.4 19.0 (6069.3) (10.7) (21.3) (10.6) , 1.1-3
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t Table 1.1-1 CCW TEMPERATURE MONITORING OCONEE NUCLEAR STATION February, 1976 ' DAY FLOW INLET TEMP. OUTLET TEMP. AT
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x103 GPM M3 / min OF OC OF OC F0 CO l 1 1539.1 (5825.5) 49.0 ( 9.4) 69.8 (21.0) 20.8 (11.6) 2 1369.6 (5183.9) 48.7 ( 9.3) 72.5 (22.5) 23.8 (13.2) 3 1385.3 (5243.4) 48.8 ( 9.4) 72.3 (22.4) 23.5 (13.0) 6 1361.1 (5' '1,8) 48.8 ( 9.4) 72.8 (22.6) 24.0 (13.2) 5 1362.9 s,._ .6) 48.8 ( 9.4) 72.8 (22.6) 24.0 (13.2) 6 1404.4 (5315.7) 49.0 ( 9.4) 72.3 (22.4) 23.3 (13.0). ~ 7 1361.8 (5154.4) 48.8 ( 9.4) 72.2 (22.4) 23.4 (13.0) 8 1359.7 (5146.5) 48.6 ( 9.2) 63.7 (17.6) 15.1 ( 8.4) 9 1246.2 (4716.9) 48.7 ( 9.3) 64.0 (17.8) 15.3 ( 8.5) 10 1165.6 (4411.8) 48.8 ( 9.4) 65.3 (18.5) 16.5 ( 9.1) 11 1155.9 (4375.1) 49.0 ( 9.4) 64.4 (18.0) 15.4 ( 8.6) 12 1140.1 (4315.3) 48.9 ( 9.4) 64.4 (18.0) 15.5 ( 8.6) 13 1141.4 (4320.2) 48.9 ( 9.4) 63.9 (17.7) 15.0 ( 8.3) 14 1141.7 (4321.3) 48.9 ( 9.4) 58.9 (15.0) 10.0 ( 5.6) 15 951.3 (3600.7) 48.7 ( 9.3) 57.1 (14.0) 8.4 ( 4.7) 16 932.0 (3527.6) 48.7 ( 9.3) 57.3 (14.9) 8.6 ( 4.7) 17 933.4 (3532.9) 48.8 ( 9.4) 57.4 (14.1) 8.6 ( 4.7) 18 932.2 (3528.4) 48.7 ( 9.3) 57.3 (14.0) 8.6 ( 4.7) 19 931.3 (3525.0) 48.9 ( 9.4) 57.5 (14.2) 8.6 ( 4.8) 20 932.0 (3527.6) 49.2 ( 9.6) 57.9 (14.4) 8.7 ( 4.8) 21 933.1 (3531.8) 49.6 ( 9.8) 58.5 (14.7) 8.9 ( 4.9) 22 962.9 (3644.6) 49.9 (10.0) 59.0 (15.0) 9.1 ( 5.0) 23 1319.2 (4993.2) 49.4 ( 9.6) 59.6 (15.4) 10.2 ( 5.8) 24 1322.6 (500610) 49.4 ( 9.6) 57.5 (14.2) 8.1 ( 4.6) 25 1274.3 (4823.2) 49.3 ( 9.6) 58.2 (14.6) 8.9 ( 5.0) 26 1119.9 (4238.8) 49.0 ( 9.4) 59.5 (15.3) 10.5 ( 5.9) 27 1113.2 (4213.5) 49.2 ( 9.6) 50.7 (10.4) 1.5 ( 0.8) 28 1112.8 (4211.9) 49.2 ( 9.6) 50.6 (10.4) 1.4 ( 0.8) ' 29 1115.0- (4220.3) 49.3 ( 9.6) 58.3 (14.6) 9.0 ( 5.0) AVG. AVC. AVG. AVG. 1173.1 49.0 63.0 14.0 (4440.2) (9.5) (16.8) (7.3) f a 1.1-4 -
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l Table 1.1-1 CCW TEMPERATURE MONITORING OCONEE NUCLEAR STATION March, 1976 DAY FLOW INLET TEMP. OUTLET TEMP. AT
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x103 GPM M3 / min OF OC OF OC F0 CO 1 1115.5 (4222.2) 49.3 ( 9.6) 57.5 (14.2) 8.2 ( 4.6) 2 1115.1 (4220.7) 49.5 ( 9.7) 59.0 (15.0) 9.5 ( 5.3) 3 1273.7 (4821.0) 49.8 ( 9.9) 62.0 (16.6) 12.2 ( 6.7) 4 1327.5 (5024.6) 50.0 (10.0) 65.3 (18.5) 15.3 ( 8.5) 5 1326.4 (5020.4) 50.1 (10.0) 65.7 (18.7) 15.6 ( 8.7) 6 1322.3 (5004.9) 50.2 (10.1) 64.1 (17.8) 13.9 ( 7.7) . 7 1319.6 (4994.7) 50.2 (10.1) 64.2 (17.9) 14.0 ( 7.8) 3 ~ 8 1321.6 (5002.3) 49.8 ( 9.9) 66.6 (19.2) 16.8 ( 9.3) 9 1321.9 (5003.4) 49.7 ( 9.8) 66.5 (19.2) 16.8 ( 9.4) 10 1322.5 (5005.7) 49.8 ( 9.9) 66.5 (19.2) 16.7 ( 9.3) 11- 1394.1 (5276.7) 50.2 (10.1) 66.1 (19.0) 15.9. ( 8.9) 12 1325.7 (5017.8) 50.3 (10.2) 67.1 (19.5) 16.8 ( 9.3) 13 1326.7 (5021.6) 50.5 (10.3) 67.2 (19.6) 16.7 ( 9.3) 14 1324.8 (5014.4) 50.5 (10.3) 67.3 (19.6) 16.8 ( 9.3) ., 15 1223.8 (4632.1) 50.7 -(10.4) 68.4 (20.2) 17.7 ( 9.8) 1173.2 (4440.6) 50.6 (10.4) 68.8 (20.4) 18.2 (10.0) li 1172.5 (4437.9) 50.3 (10.2) 68.5 (20.3) 18.2 (10.1) 18 1143.6 (4328.5) 50.7 (10.4) 69.5 (20.8) 18.8 (10.4) 19 1271.9 (4814.1) 51.8 (11.0) 69.1 (20.6) 17.3 ( 9.6) 20 1326.9 (5022.3) 52.3 (11.3) 66.1 (19.0) 13.8 ( 7.7) 21 1326.5 (5020.8) 52.5 (11.4) 61.3 (16.3) 8.8 ( 4.9) 22 1275.6 (4828.1) 52.2 (11.2) 61.4 (16.4) 9.2 ( 5.2) 23 1261.6 (4775.1) 52.3 (11.3) 61.5 (16.4) 9.2 ( 5.1)
, 24 1323.6 (5009.8) 52.2 (11.2) 60.9 (16.0) 8.7 ( 4.8) 25 1326.1 (5019.3) 52.1 (11.2) 60.9 (16.0) 8.8 ( 4.8)
, 26 1324.7 (5014.0) 52.5 (11.4) 60.3 (15.7) 7.8 ( 4.3) 27 1323.6 (5009.8) 52.6 (11.4) 59.1 (15.0) 6.5 ( 3.6) 28 1323.0 (5007.6) 52.7 (11.5) 59.3 (15.2) 6.6 ( 3.7) 29 1324.6 (5013.6) 52.5 (11.4) 59.2 (15.1) 6.7 ( 3.7) 30 1340.0 (5071.9) 52.4 (11.4) 59.0 (15.0) 6.6 ( 3.6) 31 1322.8 (5006.8) 52.7 .(11.5) 59.5 (15.3) 6.8 ( 3.8) AVG. AVG. AVG. AVG. 1287.8 51.1 63.8 12.7 (4874.3) (10.6) -(17.7) (7.1) 1.1-5
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Table 1.1-1 CCW TE5 5RATURE MONITORING OCONEE NUCLEAR STATION April, 1976 DAY FLOW INLET TEMP. OUTLET TEMP. AT
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x103 GPM M3 / min OF OC OF OC F0 CO 1 1321.1 (5000.4) 53.1 (11.7) 60.0 (15.6) 6.9 (3.9) 2 1322.5 (5005.7) 53.5 (12.0) 60.4 (15.8) 6.9 (3.8) 3 1325.2 (5015.9) 53.5 (12.0) 60.4 (15.8) 6.9 (3.8) 4 1327.4- (5024.2) 53.5 (12.0) 60.8 (16.0) 7.3 (4.0) 5 1328.4 (5028.0) 53.4 (11.9) 60.9 (16.0) 7.5 (4.1) 6 1329.7 (5032.9) 53.3 (11.8) 63.1 (17.3) 9.8 (5.5) - 7 1329.1 (5030.6) 53.2 (11.8) 62.0 (16.6) 8.8 (4.8) 8 1183.5 (4479.5) 53.2 (11.8) 59.5 (15.3) 6.3 (3.5) 9 1035.8 (3920.5) 53.0 (11.6) 61.8 (16.6) 8.8 (5.0) 10 1098.2 (4156.7) 53.1 (11.7) 62.1 (16.7) 9.0 (5.0) 11 1112.3 (4210.1) 53.9 (12.2) 62.7 (17.0) 8.8 (4.8) 12 1136.1 (4300.1) 45.2 (12.4) 62.6 (17.0) 8.4 (4.6) 13 1092.0 (4133.2) 54.1 (12.3) 64.6 (18.1) 10.5 (5.' 14 1001.9 (3792.2) 53.8 (12.6) 64.0 (17.8) 10.2 (5. 4, 15 1077.1 (4076.8) 53.9 (12.2) 64.4 (18.0) 10.5 (5.8) 16 1076.9 (4076.1) 53.9 (12.2) 64.5 (18.0) 10.6 (5.8) 17 1076.1 (4073.0) 53.9 (12.2) 65.5 (18.6) 11.6 (6.4) 18 1153.5 (4366.0) 54.0 (12.2) '66.0 (18.9) 12.0 (6.7) 19 1109.9 (4201.0) 54.4 (12.4) 62.8 (17.1) 8.4 (4.7) 20 1012.0 (3830.4) 54.4 (12.4) 60.2 (15.6) 5.8 (3.2) 21 1013.0 (3834.2) 54.4 (12.4) 63.4 (17.4) 9.0 (5.0) 22 1009.9 (3822.5) 54.6 (12.6) 64.2 (17.9) 9.6 (5.3) 23 1010.6 (3825.1) 54.6 (12.6) 65.5 (18.6) 10.9 (6.0) 24 1039.9 (3936.0) 54.6 (12.6) 66.4 (19.1) 11.8 (6.5) 25 1061.3 (4017.0) 55.0 (12.8) 66.5 (19.2) 11.5 (6.4) 26 1059.8 (4011.3) 55.5' (13.0) 66.9 (19.4) 11.4 (6.4) 27 1042.4 (3945.5) 55.2 (12.9) 64.4 (18.0) 9.2 (5.1) 28 1057.1 (4001.1). 55.0 (12.8) 64.5 (18.0) 9.5 (5.2) 29 1058.6 (4006.8) 55.0 (12.8) 64.6 (18.1) 9.6 (5.3) 30 1059.5 (4010.2) 55.1 (12.8) 64.7 (18.2) 9.6 (5.4) AVG. AVG. AVG. AVC. 1128.7 54.0 63.2 9.2 (4272.1) (12.3) (17.4) (5.1) 1.1 Table 1.1-1 CCW TEMPERATURE MONITORING OCONEE NUCLEAR STATION MAY 1976 DAY FLOW INLET TEMP. OUTLET TEMP. AT
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x103 GPM M3 / min OF , 0C OF OC F0 CO 1 1058.0 (4004.5) 55.6 (13.1) 65.5 (18.6) 9.9 (5.5) 2 999.2 (3782.0) 55.9 (13.3) 65.5 (18.6) 9.6 (5.3) 3 1052.9 (3985.2) 55.9 (13.3) 65.9 (18.8) 10.0 (5.5) 4 1051.1 (3978.4) - 56.0 (13.4) 66.0 (18.9) 10.0 (5.5) 5 1021.9 (3867.9) 55.9 (13.3) 65.7 (18.7) 9.8 (5.4) 6 1058.7 (4007.2) 55.9 (13.3) 66.2 (19.0) 10.3 (5.7) - 7 1063.1 (4023.8) 56.0 (13.4) 66.6 (14.2) 10.6 (5.8) 8 1060.2 (4012.9) 55.9 (13.3) 66.5 (19.2) 10.6 (5.9) 9 1056.0 (3997.0) 55.9 (13.3) 66.5 (19.2) 10.6 (5.4) 10 1052.5 (3983.7) 56.0 (13.4) 66.5 (19.2) 10.5 (5.8) 11 1109.3 '(4193.7) 56.4 (13.6) 66.3 (19.0) 4.9 (5.4) 12 1051.3 (3979.1) 56.7 (13.7) 67.2 (14.6) 10.5 (5.9) 13 1049.1 (3970.8) 56.8 (13.8) 67.3 (19.6) 10.5 (5.8) 14 1051.0 (3978.0) 56.8 (13.8) 67.2 (19.6) 10.4 (5.8) 15 1050.1 (3974.6) 57.0 (13.9) 67.5 (14.7) 10.5 (5.8) 16 1044.9 (3954.9) 56.9 (13.8) 67.2 (19.6) 10.3 (5.5) 17 1044.3 (3952.7) 57.5 '(14.2) 67.9 (20.0) 10.4 (3.8) 18 1044.2 (3952.3) 57.7 (14.3) 68.0 (29.0) 10.3 (5.7) 19 1039.1 (3933.0) 57.4 (14.1) 67.7 (19.8) 10.3 (5.7) 20 1045.0 (3952.3) 57.8 (14.4) 68.2 (20.1) 10.4 (5.7) 21 1046.9 (3962.5) 57.7 (14.3) 68.1 (20.0) 10.4 (5.7) 22 1049.1 (3970.8) 57.7 (14.3) 68.1 (20.0) 10.4 (5.7) 23 1050.5 (3976.1) 57.7 (14.3) 68.2 (20.1) 10.5 (5.8) 24 1048.8 , (3969.7) 57.7 (14.3) 68.1 (20.0) 10.4 (5.7) 25 1047.1 (3963.3) 57.9 (14.4) 68.3 (20.2) 10.4 (5.8) 26 1046.3 (3960.2) 58.0 (14.4) 68.5 (20.3) 10.5 (5.9) 27 1044.4 (3953.1) 58.1 (14.5) 68.7 (20.4) 10.6 (5.9) 28 1043.3 (3948.9) 58.1 (14.5) 68.6 (20.4) 10.5 (5.0) 29 1042.9 (3947.4) 58.4 (14.6) 68.9 (20.5) 10.5 (5.0) 30 1047.9 (3966.3) 58.8 (14.9) 64.5 (2n.8) 10.7 (5.9) 31 1052.1 (3982.2) 59.0 (15.0) 72.5 (22.5) 13.5 -(7.5) AVG. AVG. AVG. AVG. 1049.1 57.1 67.5 10.4 (3970.7) (13.9) (19.7) (5.8)
,
a 1.1-7
._ __ __ __ .. ___
Table 1.1-1 CCW TEMPERATURE MONITORING OCONEE NUCLEAR STATION June, 1976 DAY FLOW INLET TEMP. OUTLET TEMP. AT
~~~
3 x103 GPM M / min OF OC OF OC F0 CO 1 1214.0 (4595.0) 59.2 (15.1) 78.3 (25.7) 19.1 (10.6) 2 1211.7 (4586.3) 59.3 (15.2) 78.6 (25.9) 19.3 (10.7) 3 1208.1 (4572.7) 59.3 (15.2) 77.6 (25.4) 18.3 (10.2) 4 1206.2 (4565.5) 58.9 (15.0) 77.9 (25.5) 19.0 (10,5) 5 1215.5 (4600.7) 59.2 (15.1) 78.2 (25.6) 19.0 (10.5) 6 1226.4 (4641.9) 59.6 (15.4) 78.5 (25.8) 18.9- (10.4) . 7 1233.1 (4667.3) 60.5 (15.8) 79.4 (26.4) 18.9 (10.6) 8 1236.3 (4679.4) 60.3 (15.7) 78.6 (25.9) 18.3 (10.2) 9 1140.3 (4316.0) 60.1 (15.6) 76.0 (24.4) 15.9 ( 8.8) 10 1240.0 (4693.4) 60.2 (15.6) 78.7 (26.0) 18.5 (10.4) 11 1233.8 (4669.9) 60.3 (15.7) 79.1 (26.2) 18.8 (10,5) 12 1232.2 (4663.9) 60.3 (15.7) 79.1 (26.2) 18.8 (10,5) 13 1369.3 (5182.8) 60.7 (16.0) 77.9 (25.5) 17.2 ( 9.5) 14 1485.5 (5622.6) 60.8 (16.0) 77.0 (25.0) 16.2 ( 9.0) 15 1481.7 (5608.2) 61.1 (16.2) 77.1 (25.0) 16.0 ( 8.8) 16 1480.9 (5605.2) 61.2 (16.2) 76.6 (24.8) 15.4 ( 8.6) 17 1480.9 (5605.2) 61.3 (16.3) 77.2 (25.1) 15.9 ( 8.8) 18 1485.3 (5621.9) 61.2 (16.2) 77.2 (25.1) 16.0 ( 8.9) 19 1481.1 (5606.0) 61.4 (16.4) 77.4 (25.2) 16.0 ( 8.8) 20 1487.2 (5629.1) 61.6 (16.4) 77.6 (25.4) 16.0 ( 9.0) 21 1479.2 (5598.8) 61.4 (16.4) 74.9 (23.8) 13.5 ( 7.4) 22 1480.2 (5602.6) 61.6 (16.4) 76.5 (24.7) 14.9 ( 8.3) 23 1483.7 (5615.8) 61.8 (16.6) 77.9 (25.5) 16.1 ( 8.9) 24 1475.6 (5585.1) 62.0 (16.6) 78.1 (25.6) 16.1 ( 9.0) 25 1482.9 (5612.8) 62.2 (16.8) 78.2 (25.6) 16.0 ( 8.8) 26 1488.3 (5633.2) 62.2 (16.8) 78.3 (25.7) 16.1 ( 8.9) 27 1495.0 (5658.6) 62.2 (16.8) 75.9 28 (24.4) 13.7 ( 7.6) 1488.8 (5635.1) 62.4 (16.9) 77.9 (25.5) 15.5 ( 8.b) 29 1489.9 (5639.3) 62.6 (17.0) 78.6 (25.9) 16.0 ( 8.9) 30 1483.9 (5616.6) 62.9 (17.2) 78.8 (26.0) 15.9 ( 8.8) AVG. AVC. AVG. AVG. 1373.2 61.0 77.7 16.7 (5197.6) (16.1) (25.4). (9.3) 1.1-8
Table 1.1-1 CCW TEMPERATURE MONITORING OCONEE NUCLEAR STATION f July, 1976 DAY FLOW INLET TEMP. OUTLET TEMP. AT x103 GPM M3 / min OF OC OF OC F0 ""~ CO 1 1483.1 (5613.5) 63.1 (17.3) 78.5 (25.8) 15.4 ( 8.5) 2Y 1333.4 (5046.9) 62.7 (17.0) 73.0 1291.0 (22.8) 10.3 ( 5.8) 3 (4886.4) 63.1 (17.3) 73.0 (22.8) 9.9 ( 5.5) 4 1243.5 (4706.6) 63.1 (17.3) 73.6 (23.1) 10.5 ( 5.8) 5 1137.6 (4305.8) 62.6 (17.0) 74.1 (23.4) 11.5 ( 6.4) 6 1136.8 (4302.8) 63.2 (17.4) 74.6 (23.6) 11.4 ( 6.2) 7 1!22.7 (4249.4) 63.6 (17.6) 70.5 (21.4) 6.9 ( 3.8) - 8 1124.1 (4254.7) 63.6 (17.6) 73.5 (23.0) 9.9 ( 5.4) 9 1213.1 (4591.6) 63.6 (17.6) 75.9 (24.4) 12.3 ( 6.8) 10 1467.5 (5554.5) 63.9 78.4 (17.7) (25.8) 14.5 ( 8.1) 11 1654.8 (6263.4) 64.6 (18.1) 78.3 (25.7) 13.7 ( 7.6) 12 1664.1 (6298.6) 64.8 (18.2) 79.2 (26.2) 14.4 ( 8.0) 13 1775.3 (6719.5) 65.0 (18.4) 79.5 (26.4) 14.5 ( 8.0) 14 1705.2 (6454.2) 64.9 (18.3) 79.4 (?6.4) 14.5 ( 8.1) 15 1751.3 (6628.7) 65.3 (18.5) 81.8 (; ' . 6) 16.5 ( 9.1) 16 1820.5 (6890.6) 65.8 (18.8) 82.9 (28.3) 17.1 ( 9.5) 17 1818.3 (6882.3) 65.9 (18.8) 83.2 (28.4) 17.3 ( 9.6) 18 1816.8 (6876.6) 65.7 (18.7) 83.9 (28.8) 18.2 (10.1) 19 1819.4 (6886.4) 65.9 (18.8) 84.6 (29.2) 18.7 (10.4) 20 1819.7 (6887.6) 66.4 (19.1) 85.0 (29.4) 18.6 (10.3) 21 1839.0 (6960.6) 66.7 (19.3) 83.8 (28.8) 17.1 ( 9.5) 22 1635.5 (6190.4) 66.5 (19.2) 80.2 (26.8) 13.7 ( 7.6) 23 1748.7 (6618.8) 66.7 (19.3) 79.4 (26.4) 12.7 ( 7.1) 24 1736.5 (6572.7) 67.1 (19.5) 79.9 (26.6) 12.8 ( 7.1) 25 1659.1 (6279.7) 67.1 (19.5) 80.4 26 1745.2 (26.9) 13.3 ( 7.4) (6605.6) 67.2 (19.6) 78.7 (26.0) 11.5 ( 6.4) 27 1747.1 (4412.8) 67.6 (19.8) 77.8 (25.4) 10.2 28 1328.5 ( 5.6) (5028.4) 67.8 (19.9) 77.0 (25.0) 9.2 ( 5.1) 29 1282.7 (4855.0) 67.4 (19.6) 76.9 (25.0) 9.5 30 1410.5 ( 5.4) (5338.7) 67.2 (19.6) 76.0 (24.4) 8.8 ( 4.8) 31 1419.5 (5372.8) 67.7 (19.8) 77.7 (25.4) 10.0 ( 5.6) AVG. AVG. AVG. AVG. 1540.3 65.5 78.9 13.4 (5830.0) (18.6) (26.0) (7.4) 1.1-9
.
Table 1.1-1 CCW TEMPERATURE MONITORING
.OCONEE NUCLEAR STATION August, 1976 l DAY FLOW INLET TEMP. OUTLET TEMP. AT
--~
x103 GPM M3 / min OF OC OF OC F0 CO 1 1540.7 (5831.5) 68.1 (20.0) 81.4 (27.4) 13.3 (7.4) 2 1553.4 (5879.6) 68.2 (20.1) 82.7 (28.2) 14.5 (8.1) 3 1550.2 (5867.5) 68.2 (20.1) 82.7 (28.2) 14.5 (8.1) 4 1645.5 (6228.2) 69.2 (20.6) 84.2 (29.0) 15.0 (8.4) 5 1891.9 (7160.8) 69.2 (20.6) 85.7 (29.8) 16.5 (9.2) 6 1955.2 (7400.4) 69.6 (20.9) 86.2 (30.1) 16.6 (9.2) . 7 1996.8 (7557.9) 70.0 (21.1) 86.3 (30.2) 16.3 (9.1) 8 1974.9 (7475.0) 69.7 (21.0) 85.5 (29.7) 15.8 (8.7) 9 1940.8 (7345.9) 70.0 (21.1) 86.6 (30.4) 16.6 (9.3) 10 1907.6 (7220.3) 70.3 (21.3) 85.8 (29.9) 15.5 (8.6) 11 1930.1 (7305.4) 70.6 (21.4) 86.1 (30.0) 15.5 (8.6) 12 1928.4 (7299.0) 70.9 (21.6) 86.4 (30.2) 15.5 (8.6) 13 1925.5 (7288.0) 71.0 (21.6) 86.5 (30.3) 15.5 (8.7) 14 1923.7 (7281.2) 71.1 (21.7) 84.9 (29.4) 13.8 (7.7) 15 1800.1 (6813.4) 71.2 (21.8) 83.3 (28.5) 12.1 (6.7) 16 1999.3 (7567.4) 71.6 (22.0) 86.9 (30.5) 15.3 (3.5) 17 1968.4 (7450.4) 71.7 (22.0) 87.5 (30.8) 15.8 (8.8) 18 1916.4 (7253.6) 71.8 (22.1) 87.5 (30.8) 15.7 (8.7) 19 1996.1 (7555.2) 72.1 (22.3) 88.0 (31.1) 15.9 (8.8) 20 2016.9 (7634.0) 72.1 (22.3) 88.1 (31.2) 16.0 (8.9) 21 2020.4 (7647.2) 72.7 (22.6) 88.8 (31.6) 16.1 (9.0) 22 2022.0 (7653.3) 73.5 (23.0) 89.5 (32.0) 16.0 (9.0) 23 2018.5 (7640.0) 73.7 (23.2) 89.7 (32.0) 16.0 (8.8) 24 2016.1 (7630.9) 73.8 (23.2) 89.8 (32.1) 16.0 (8.9) 25 2013.4 (7620.7) 74.2 (23.4) 90.2 (32.4) 16.0 (9.0) 26 2011.3 (7612.8) 74.6 (23.6) 90.7 (32.6) 16.1 (9.0) 27 2005.6 (7591.2) 74.8 (23.8) 90.8 (32.6) 16.0 (8.8) 28 1992.3 (7540.9) 74.8 (23.8) 89.8 (32.1) 15.0 (8.3) 29 1952.4 (7389.8) 75.0 (23.9) 87 9 (31.0) 12.9 (7.1) 30 1976.2 (7479.9) 75.3 (24.0) 91.3 (33.0) 16.0 (9.0) 31 1974.3 (7472.7) 75.2 (24.0) 91.0 (32.8) 15.8 (8.8) AVG. AVG. AVG. AVG. 1915.0 71.9 87.3 15.4 (7248.3) (22.2) (30.7) (8.5) 1.1-1:
.
. _ _ _ _
Table 1.1-1 CCW TEMPERATURE MONITORING OCONEE NUCLEAR STATION September 1976 DAY FLOW INLET TEMP.
- OUTLET TEMP. AT
~~
3 x103 GPM M / min OF OC OF OC F0 CO 1 1960.2 (7419.4) 75.6 (24.2) 89.7 (32.0) 14 ' (7.8) 2 1996.5 (7556.8) 75.7 (24.3) 91.6 (33.1) 15. (8.8) 3 2016.1 (7630.9) 75.6 (24.2) 91.6 (33.1) 16.o (R.9) 4 2012.5 (7617.3) 75.8 (24.4) 90.7 (32.6) 14.9 (8.2) 5 1977.3 (7484.1) 76.2 (24.6) 87.3 (30.7) 11.1 (6.1) 6 2010.4 (7609.4) 76.3 (24.6) 91.6 (33.1) 15.3 (8.5) 7 2019.0 (7641.9) 76.3 (24.6) 91.9 (33.3) 15.6 (8.7) . 8 1876.8 (7103.7) 76.2 (24.6) 90.0 (32.2) 13.8 (7.6) 9 2016.3 (7631.7) 76.4 (24.6) 91.9 (33.3) 15.5 (8.7) 10 1987.3 (7521.9) 76.5 (24.7) 91.6 (33.1) 15.1 (8.4) 11 1973.4 (7469.3) 76.4 (24.6) 90.6 (32.6) 14.2 (8.0) 12 1977.4 (7484.5) 76.9 (25.0) 90.8 (32.6) 13.9 (7.6) 13 1985.6 (7515.5) 76.9 (25.0) 90.8 (32.6) 13.9 (7.6) 14 1990.5 (7534.0) 76.6 (24.8) 90.8 (32.6) 14.2 (7.8) 15 1988.0 (7524.6) 76.4 (24.6) 90.5 (32.5) 14.1 (7.9) 16 1984.7 (7512.1) 76.7 (24.8) 90.9 (32.7) 14.2 (7.9) 17 1974.3 (7472.7) 76.6 (24.8) 90.7 (32.6) 14.1 (7.8) 18 1969.2 (7453.4) 76.4 (24.6) 90.1 (32.3) 13.7 (7.7) 19 1728.4 (6542.0) 76.3 (24.6) 88.8 (31.6) 12.5 (7.0) 20 1641.7 (6213.8) 76.2 (24.6) 89.6 (32.0) 13.4 (7.4) 21 1641.0 (6211.2) 76.3 (24.6) 89.8 (32.1) 13.5 (7.5) 22 1635.7 (6191.1) 76.3 (24.6) 89.9 (32.2) 13.6 (7.6) 23 1586.4 (6304.5) 76.2 (24.6) 90.3 (32.4) 14.1 (7.8) 24 140C.9 (5302.4) 76.0 (24.4) 92.0 (33.4) 16.0 (9.0) 25 1405.8 (5321.0) 75.8 (24.4) 92.0 (33.4) 16.2 (9.0) 26 1410.6 (5339.1) 75.7 (24.3) 91.7 (33.2) 16.0 (8.4) 27 1404.9 (5317.5) 75.9 (24.4) 92.0 (33.4) 16.1 (9.0) 28 1402.6 (5308.8) 75.9 (24.4) 92.1 (33.4) 16.2 (9.0) 29 1404.6 (5316.4) 75.7 (24.3) 91.9 (33.3) 16.2 (4.0) 30 1401.6 (5305.1) 75.7 (24.3) 91.8 (33.2) 16.1 (8.9) AVG. AVG. AUG. AVG. 1792.7. 76.2 90.8 14.6 < (6785.4) (24.6) (32.6) (8.0) 1.1-11 - l
!
Table 1.1-1~ CCW TEMPERATURE MONITORING OCONEE NUCLEAR STATION October 1976 DAY FLOW INLET TEMP. OUTLET TEMP. AT
~~'
x103 GPM 3 M / min DF OC OF OC F0 CO ' 1 1401.5 (5304.7) 75.4 (24.1) 01.5 (33.0) 16.1 (8.0) 2 1401.4 (5304.3) 75.4 (24.1) 91.5 (33.0) 16.1 (8.9) 3 1401.8 (5305.8) 75.4 (24.1) 90.4 (32.4) 15.0 (8.3) 4 1402.8 (5309.6) 75.3 (24.0) 91.2 (37.9) 15.0 (8.4) 5 1402.0 (5306.6) 75.1 (24.0) 91.2 (32.9) 16.1 (8.9) 6 1406.7 (5324.4) 74.7 (23.7) 90.8 (32.6) 16.1 (8.0)
- 7 1406.1 (5322.1) 74.6 (23.6) 90.7 (32.6) 16.1 (4.0) 8 1403.8 (5313.4) 74.7 (23.7) 90.8 (32.6) 16.1 (8.9) 9 1337.4 (5062.1) 74.5 (23.6) 88.0 (31.1) 13.5 (7.5) 10 1305.8 (4942.5) 74.0 (23.4) 88.7 (31.5) 14.7 (8.1) 11 1380.4 (5224.8) 73.7 (23.2) 89.6 (32.0) 15.0 (8.8) 12 1399.5 (5297.1) 73.4 (23.0) 89.4 (31.4) 16.0 (8.0) 13 1400.4 (5300.5) 73.2 (22.9) 87.1 (30.6) 13.9 (7.7) 14 1400.2 (5299.8) 72.9 (22.7) 87.5 (30.8) 14.6 (8.1) 15 1400.5 (5300.9) 72.7 (22.6) 86.4 (30.2) 13.7 (7.6) 16 1316.1 (5151.8) 72.4 (22.4) 84.4 (29.1) 12.0 (6. 7) 17 1344.6 (5089.3) 72.1 (22.3) 87.2 (30.6) 15.1 (8.3) 18 1397.5 (5289.5) 71.8 (22.1) 87.6 (30.9) 15.8 (8.8) 19 1398.3 (5292.6) 71.2 (21.8) 87.4 (30.8) 16.2 (4.0) 20 1401.3 (5303.9) 70.7 (21.5) 86.7 (30.4) 16.0 (8.0) 21 1397.5 (5289.5) 70.2 (21.2) 86.4 (30.2) 16.2 (9.0) ,
22 1396.2 (5284.6) 69.6 (20.9) 84.8 (29.4) 15.2 (8.5) 23 1396.6 (5286.1) 69.1 , (20.6) 85.3 (20.6) 16.2 (9.0) 24 1705.7 (6456.1) 6 8.,8 ' (20.4) 82.2 (27.0) 13.4 (7.5) 25 1837.0 (6953.0 68.6 (20.4) 81.0 (27.2) 12.4 (6.8) 26 1827.9 (6918.6) 68.4 (20.2) E0.6 (27.0) 12.2 (6.8) 27 1819.9 (6888.3) 68.1 (20.0) 77.2 (25.1) 9.1 (5.1) 28 1818.8 (6884.2) 67.6 (19.8) 79.7 (26.5) 12.1 (6.7) 29 1792.6 (6785.0) 67.3 (19.6) 79.8 (26.6) 12.5 (7.0) 30 1808.4 (6844.8) 66.8 (19.4) 70.2 (26.2) 12.4 (6.8) 31 1665.2 (6302.8) 66.7 (19.3) 75.1 (24.0) 8.4 (4. 7) AVG. AVC. At7G. AVG. 1489.5 71.5 85.7 14.2 (5637.8) (22.0) (29.8) (7.8) 1.1-12
r Table 1.1-1 CCW TEMPERATURE MONITORING OCONEE NUCLEAR STATION November, 1976 DAY FLOW INLET TEMP. OUTLET TEMP. AT x103 GPM M3 / min OF OC OF OC FO ""~ CO 1 1613.8 (6108.2) 66.4 (19.1) 73.6 (23.1) 7.2 (4.0) 2 1616.7 (6119.2) 66.0 (18.9) 73.2 (22.9) 7.2 (4.0) 3 1626.0 (6154.4) 65.8 (18.8) 73.0 (22.8) 7.2 (4.0) 4 1541.3 (5833.8) 65.5 (18.6) 7 3 . '. (22.8) 7.6 (4.2) 5 1542.8 (5839.5) 65.0 (18.4) 7 '. 7 (22.6) 7.7 (4.2) 6 1543.6 (5842.5) 64.4 (18.0) 72.0 (22.2) 7.6 (4.2) 7 1538.1 (5821.7) 63.8 (1756) 71.4 (21.9) 7.6 (4.3)
'
8 1544.7 (5846.7) 63.0 (17.2) 70.9 (21.6) 7.9 (4.4) 9 1408.7 (5331.9) 62.5 (17.0) 70.9 (21.6) 8.4 (4.6) 10 1257.4 (4759.3) 62.3 (16.8) 71.1 (21.7) 8.8 (4.9)
,
11 1225.4 (4638.1) 61.8 (16.6) 72.3 (22.4) 10.5 (5.8) 12 1239.0 (4689.6) 61.4 (16.4) 69.9 (21.0) 8.5 (4.6) 13 1268.8 (4802.4) 61.0 (16.1) 71.7 (22.0) 10.7 (5.9) 14 1268.3 (4800.5) 60.6 (15.9) 71.6 (22.0) 11.0 (6.1) 15 1533.8 (5805.4) 60.4 (15.8) 72.2 (22.4) 11.8 (6.6) 16 1777.5 (6727.8) 60.1 (15.6) 74.9 (23.8) 14.8 (8.2) 17 1757.9 (6653.7) 59.8 (15.4) 76.4 (24.6) 16.6 (9.2) 18 1746.0 (6608.6) 59.8 (15.4) 76.7 (24.8) 16.9 (9.4) 19 1616.8 (6119.6) 59.6 (15.4) 73.3 (23.0) 13.7 (7.6) 20 1327.7 (5025.3) 59.6 (15.4) 74.9 (23.8) 15.3 (8.4) 21 1471.5 (5569.6) 59.4 (15.2) 74.9 (?3.8) 15.5 (8.6) 22 1472.9 (5574.9) 59.0 (15.0) 74.6 (23.6) 15.6 (8.6) 23 1465.6 (5547.3) 58.5 (14.7) 74.3 (23.5) 15.8 (8.8) 24 1474.0 (5579.0) 58.2 (14.6) 74.0 (23.4) 15.8 (8.8) 25 1473.7 (5578.0) 58.1 (14.5) 74.0 (23.4) 15.9 (8.9) 26 1649.0 (6241.5) 57.7 (14.3) 71.6 (22.0) 13.9 (7.7) 27 1694.3 (6412.9) 57.5 (14.2) 71.2 (21.8) 13.7 (7.6) 28 1769.9 (6699.1) 57.4 (14.1) 71.3 (21.8) 13.9 (7.7) 29 1769.9 (6699.1) 57.4 (14.1) 71.4 (21.9) 14.0 (7.8) 30 1809.4 (6848.6) 57.2 (14.0) 70.9 (21.6) 13.7 (7.6) AVG. AVG. AVG. AVG. 1534.8 60.9 72.9 12.0 (5809.2) (16.0) (22.7) (b.7) 4 1.1-13
Table 1.1-1 CCW TEMPERATURE MONITORING OCONEE NUCLEAR STATION December, 1976 DAY FLOW INLET TDiP. OUTLET TEMP. ~ AT x103 GPM M3 / min OF OC OF OC F0 CO 1 1840.8 (6967.4) 56.9 (13.8) 70.3 (21.3) 13.4 ( 7.5) 2 1770.4 (6701.0) 56.7 (13.8) 70.6 (21.4) 13.9 ( 7.6) 3 1769.3 (6696.8) 56.4 (13.6) 70.2 (21.2) 13.8 ( 7.6) 4 1751.8 (6630.6) 56.2 (13.6) 70.0 (21.1) 13.,8 ( 7.5) 5 1381.6 (5229.4) 55.7 (13.2) 64.3 (18.0) 8.6 ( 4.8) 6 1208.9 (4575.7) 55.2 (12.9) 64.9 (18.3) 9.2 ( 5.4) .. 7 1253.3 (4743.7) 55.3 (13.0) 71.3 (21.8) 16.0 ( 8.8) 8 1233.1 (4667.3) 55.1 (12.8) 68.1 (20.0) 13.0 ( 7.2) 9 946.7 (3583.3) 54.8 (12.6) 66.8 (19.4) 12.0 ( 6.8) 10 946.7 (3583.3) 54.4 (12.4) 66.5 (19.2) 12.1 ( 6.8) 11 946.7 (3583.3) 54.1 (12.3) 66.1 (19.0) 12.0 ( 6.7) 12 946.4 (3582.1) 53.8 (12.1) 65.8 (18.8) 12.0 ( 6.7) 13 946.3 (3581.7) 53.4 (11.9) 65.4 (18.6) 12.0 ( 6.7) 14 946.6 (3582.9) 53.1 (11.7) 65.1 (18.4) 12.0 ( 6.7) 15 946.9 (3584.0) 53.2 (11.8) 65.2 (18.4) 12.0 ( 6.6) 16 947.0 (3584.4) 53.2 (11.8) 65.2 (18.4) 12.0 ( 6.6) 17 947.5 (3586.3) 53.1 (11.7) 65.3 (18.5) 12.2 ( 6.8) 18 947.6 (3586.7) 53.0 (11.6) 65.3 (18.5) 12.3 ( 6.9) 19 947.6 (3586.7) 52.7 (11.5) 65.0 (18.4) 12.3 ( 6.9) 20 947.6 (3586.7) 52.5 (11.4) 64.9 (18.3) 12.4 ( 6.9) 21 879.5 (3328.9) 52.4 (11.4) 66.5 (19.2) 14.1 ( 7.8) 22 1276.0 (4829.7) 52.2 (11.2) 70.4 (21.4) 18.2 (10.2) 23 1341.5 (5077.6) 52.1 (11.2) 71.0 (21.6) 18.9 (10.4) 24 1359.9 (5147.2) 51.7 (11.0) 70.8 (21.6) 19.1 (10.6) 25 1412.6 (5346.7) 51.1 (10.6) 71.0 (21.6) 19.9 (11.0) 26 1662.3 (6291.8) 51.0 (10.6) 71.2 (21.8) 20.2 (11.2) 27 1761.8 (6668.4) 50.6 (10.4) 68.0 (20.0) 17.2 ( 9.6) 28 1766.0 (6684.3) 50.8 (10.4) 69.6 (20.9) 18.8 (10.5) 29 1764.8 (6679.8) 50.4 (10.2) 70.7 (21.5) 20.3 (11.3) 30 1763.5 (6674.8) 49.9 (10.0) 70.0 (21.1) 20.1 (11.1) 31 1693.0 (6408.0) 49.6 ( 9.8) 70.3 (21.3) 20.7 (11.5) AVG. AVG. AVG. AVG. 1298.5 53.2 68.4 15.2 (4914.8) (11.8) (20.2) (8.4) 1.1-14~ ,
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1.2 CHEMICAL LISCHARGE LIMITS Specification: A. Chemical wastes and the resulting chemical concentrations in the Keowee River shall not exceed the maximum concentrations given in Table 1.2-1, " Chemical Wastes from Oconee Stations." B. All water discharged from the plant site shall have a pH between 6.0 and 8.5. C. Chlorine or other chemical biocides will not be used for , condenser cleaning. I. INTRODUCTION The noted specifications were established to insure that chemical concentrations in the river resulting from station discharges are not toxic to aquatic organisms. A chemical invent y is maintained to determine what quantities of environmentally significant chemicals are used and thus to estimate the quantities which are discharged over the period of interest. In addition, the pH and specific conductance of the waste water collection basin and effluent from the plant site are determined and recorded daily, and corrective measures are initiated as necessary. II. RESULTS AND CONCLUSIONS A chemical inventory for the year of 1976 is presented in Table 1.2-2. Table 1.2-3 should list the dates on which discharges from the yard drains were outside the specified pH limits. 1.2-1 , .
Table 1.2-1. Chemical Wastes From Oconee Nuclear Station Resulting increase Founds per year in concentration in (3) units (from DPC) Keowee River water (ppm) Reactor coolant Boron 60,000 (startup) 0.2 - Lithium hydroxide 180 a Hydrazine 300 b Steam generator feedwater
- Hydrazine 1,800-13,000 b Regeneration of deborating demineralizers Sodium hydroxide 4,100 c Regeneration of water treatment demineralizers Sodium hydroxide 440,000 4.4 d
'
Sulfuric Acid 150,500 2.5" Laundry and cleaning detergents Floor cleaning (liquid) 10,000 0.17 f Laundry (solid) 4,760 0.081 f
" Most will probably be removed by the demineralizers and evaporators.
b Normally, hydrazine is reacted chemically and is not. discharged. c Most of this material will be sent to the waste drumming facility as evaporator bottoms, d Sodium release; Keowee River normal concentration is 1.2-2.8 ppm (G. A. Billingsley, " Chemical Character of Surface Waters of South Carolina, 1945-1955," Bulletin No.163, South Carolina Development Board,1956).
- Sulfate released; Keowee River normal concentration is 0.7-2.5 ppm (G. A.
Billingsley, " Chemical Character of Surface Waters of South Carolina, 1945-1955," Bulletin No.163, South Carolina Development Board,1956). i ! f Processing of these wastes through the sanitary waste system may significantly reduce this value. I ' - 1.2-2 i
TABLE 1.2-2 BLUK CHEMICAL INVENTORY January 1, 1976 - December 31, 1976 CHEMICAL RECEVIED (#) USED (#) ON SITE INVENTORY (#) Alkaline Rust Remover 3,000 (KMn0g and NaOH) 6,250 4,000 5,250 Ammonium Mydroxide 7,500 10,875 4,500 , 1,125 250 Barium Chloride None None 250* 331,700 Boric Acid None 134,100 197,600 2,000 Calgon, CS 11,000 9,400 3,600 1,050 Chlorine 2,100 1,950 1,200 4,000 Citric Acid 10,000 3,750 10,250* 1,020 Commerical Cleaning Agents 11,520 11,211 1,329 3,375 Detergent Decon (Turco 4502) None 1,000 2,375 490 Dipotassium Phosphate None 45 445 3,520 Hydrazine Hydrate 5,280 5, 720 3,080 575 Hydrogen Peroxide None None 575 2,250 Laundry Detergent (Turco 4324) 15,041 12,000 (4937)** 5,291 l 200 Lime {Ca(OH)2} None None 200* 1,240 Lithium Hydroxide None 42 1,198 50 OB Hibit 500 50 500* 1.2-3 _
BULK CHEMICAL INVENTROY (Cont'd) January 1,-1976 - December 31, 1976 CHEMICAL (#) RECEIVED (#) USED (#) ON SIfE INVENTORY (#) 390 Potassium Chromate None 195 195 400 Sodium Bisulfate None None 400* , 100 Sodium Carbonate 3,600 3,700 Zero 11,457 Sodium Hydroxide 50% 120,299 119,344 12,412 5,500 Sodium Hydroxide (Solid) None None 5,500 29,400 Sulfuric Acid (66* Baume) 160,210 174,910 14,700 295 TriPotassium Phosphate None 80 215 800 Trisodium Phosphate 3,000 1,200 2,600 1,500 larco Cleaner None None 1,500
- Use to be discontinued on site and dropped from annual inventroy.
** Conversion of 4502 to 4502 NP (no phosphate) 4,937# of 4502 returned
, to supplier in exchange for 4502 NP. I 1.2-4
. . ._. ._ ___. _ ._ .
' TABLE 1,2-3 JANUARY - DECEHBER, 1976 TIME P.E 2/11/76 0830 7.2
- 2/12/76 0830 9.2 1
! -2/12/76 1050 9.1 (Recheck) i .
2/13/76 0830 8.4
,
3/15/76 0930 6.8 ,
- 3/16/76 . 0830 8.7 l 3/16/76 1100 8.8 (Recheck) s 3/16/76 1600 8.8 (Recheck)
, 3/17/76 1000 7.6
* ;
Acid spills from water treatment room acid day tank. Refer to Inciden j Reports B-439 and B-452, respectively. .
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1.3 GENERAL AQUATIC SURVEILLANCE Specification: Surveillance programs shall be conducted to detect and quantify Oconee's effects on water quality, fish, periphyton, plankton, and benthos (Duke Power Company, 1973a). I. INTRODUCTION The objective of the aquatic surveillance program ia to determine the effects of Oconee Nuclear Station's (ONS) operation on the aquatic eco-system of Lake Keowee and the area of Lake Hartwell influenced by ONS thermal and chemi-cal discharges. The environmental monitoring programs on Lakes Keowee and , Hartwell for this reporting period are summarized in Table 1.3-1. Sampling station locations are shown in Figures 1.3-1 and 1.3-2.
'
This annual report covers the second full year in which all three Oconee Nu-clear Station (ONS) units were commercially operational and the fourth year of the non-radiological aquatic surveillance program (Section 1.3) and re-lated studies (Sections 1.4 through 1.7). For the year, ONS condenser cool-ing water flows, at's, and discharge temperatures (Section 1.1) averaged slightly lower than in 1975. This was particularly true for the months of
.
March through July, and October through December. The opposite was true for January and February, while August and September of the two years were similar. The ONS intake temperature on December 31, 1976, was 49.6 F (9.8 C), which is 5.3 Fo lower than it was one year earlier and 2.4 Fo lower than two years earlier. Some combination of the ONS operating characteristics dis-cussed above and unusually cool air temperatures in October through December, i 1976, was probably responsible for this trend. II. GENERAL CONCLUSIONS
'l Detailed descriptions and results of the General Aquatic Surveillance studies and other related studies are presented in Subsections 1.3.1 through 1.3.5 and Sections 1.4 through 1.7, respectively. Some general conclusions based on the data presented in Sections 1.3 through 1.7 of this report are as follows:
- 1. Water quality characteristics of Lakes Keowee and Hartwell (Subsection 1.3.1) were very similar this year compared to previous reporting per-iod s . Both lakes exhibited thermal stratification in Spring, Summer
-
and early Fall. As a result of this, the bottom waters exhibited lower dissolved oxygen and pH and higher ammonia, iron and manganese concen-trations during stratification. I
- 2. The effects of ONS operation on temperature and dissolved oxygen concen-trations in the lake were documented during the twelve monthly synoptic water quality surveys and six plume mapping surveys (Section 1.6). As reported previously, ONS discharge temperatures were higher than "am-bient" surface temperatures for the periods January through March and September through December. A " thermal plume" was not a-iaent from April through August, however, due to the use of cool bottom layers of the lake for condenser cooling water.
.
1.3-1 ONS 12/76
Weekly monitoring of dissolved oxygen (Subsection 1.3.1) near ONS and Keowee Hydro showed similar spatial and temporal patterns as those reported previously. The minimum ONS'Antake and discharge concentrations were 4.2 and 4.4 mg/1, respectively, which occurred on August 19. Values at the Keowee Hydro intake and tailrace and at Station 605.0 never dropped below 5 mg/1.
- 3. General taxonomic composition and production rates for Periphyton (Subsection 1.3.3) were similar to 1975. Diatoms continued to dom-inate the periphyton in general. Blue-greens were not stimulated by the operation of ONS.
- 4. Phytoplankton (Subsection 1.3.4) taxonomic composition and standing ,
crops showed patterne similar to 1975. During thermal stratification, Phytoplankton were much less abundant in the bottom waters of Lake Keowee than in surface waters. As a result, ONS intake and discharge waters had lower standing crops than sampling stations in the plune, which were, in turn. lower than at areas not directly influenced by the ONS discharge plume.
- 5. Zooplankton (Subsection 1.3.4) taxonomic composition and densities showed trends similar to those observed in 1975, and which directly parallel the temporal and spatial distribution described for phyto-plankton.
- 6. Benthos (Subsection 1.3.5), as in previous reports, were dominated by chironomid larvae, ceratopogonid larvae, Chaoborus larvae, and oligo-chaetes. Benthic sampling revealed a pattern of increasing diversity from deep waters to shallow waters, with chironomids being the most diverse group. Dredge sampling showed benthic populations at 508 (dis-charge sterion) to have reduced density, biomass, and diversity, when compared to other stations; however, littoral samples in the discharge showed no such pattern. Unsuitable substrate and scouring, rather than temperature appear to be the limiting factors.
- 7. Fish impingement (Section 1.4) in 1976 was similar to that observed in
1975. Rates of impingement were highest in Winter and early Spring, when threadfin shad dominated. Bluegill and yellow perch dominated the much lower impingement observed in the remainder of the year. Almost 4000 m3 of ONS condenser cooling water was filtered in 1976 to detect entrainment of fish eggs and larvae. One fish larva was col
- lected: a threadfin shad on August 10, 1976. This was the first time j either an egg or larva was found in the ONS CCW system in four years of l monitoring.
- 8. Entrainment studies of Phytoplankton and Zooplankton (Sectica 1.5) showed trends similar to 1975. Phytoplankton metabolism appeared to be stimu-lated in May and September and inhibited in July. Immotilities and
, l j physical damage to zooplankton as a result of passage through ONS were generally lower than in 1975, but followed a similar temporal pattern i of increasing effect from January through July, then lesser effects in l September and November.
.
9 1.3-2 ONS 12/76
- -- .-
.- - - -.
!
- 9. Monitoring by SERI fisheries biologists detected no gas-bubble disease in any Lake Keowee fishes (Section 1.7). No symptoms of this disease have yet been detected since ONS began operating. Nitrogen supersaturation (s105%) has been observed quite often.
- 10. Fish population dynamics and reproduction studies are continuing to be
! carried out by the Southeast Reservoirs Investigations group, Fish and , Wildlife Service, U. S. Department of the Interior. See Subsection 1.3.2 ' and Appendices C and D for information on these studies. l
. 4 LITERATURE CITED l
~
Duke Power Company. 1973a. Appendix B to Facility Operating License Nos. DPR-38, DPR-47, and DPR-55, Technical Specifications for the Oconee Nuclear station Units 1, 2, and 3, Duke Power Company. U. S. Atomic Energy Commission, Docket Nos. 50-269, 50-270, and 50-287 (revised August 1, 1975, NRC), Washington, D. C.
i ! 4 e 1.3-3 ONS 12/76
.
. .,
TABLE 1.3-1 SIMtARY OF CURRENT ENVIRONMENTAL MONITIMING PROGRAMS ON LAKE S E0 WEE AND LAKE HARTWELL, taEDML A. 197 5 SAMPLING STAT 1ONS LAEE EEOWEE 1AKE HAgrW1LL SAMPLING PROCAAM Pre- i at- Intake Di s(tu rge .
$00 500. 5 WI 501.5 W2 W) W4 %% %6 507 50s %8,5 W9 W9.5 549 Condenser Condenser Structure S t ruc t ure 601 602 6ul 604 em NM WATER QtIALITY Tempe rat ure M M M M M M M M M M M M M M Dissolved Ozygen(II M M M M M M M M M M M M M M M M M Con < luc t i vi t y M M M M M M M M M M M M M M M M M pH M M M M M M M M M M M M M M M M M M M M Surface Light M M M M M M M M M M M M M M M M M M M M Euphotir ikpth M M M M MM M M M M M M M M M M Alb alinitt M M M M M M M M M M M M M M M M M M Turbidity M M M M M M M ti M M M N M M M M M M M Chloride M M to M M M M M M M M M M M M M M M BOD M M M M M M Q Q Q Q Q M
NO2 -10) Nitro, tan M M M M M M M M M M M M M M M M M M M NHI Nitrogen M M M M M M M M M M M N Q Q Q Q M M M Ortho P M M M M M Q Q M M M M M M M M M M M Q Q Q Total P M M M M M M M Q Q M M M M g Q Q Q Silicon M M M M M M M M M M M M M M Q Q Q Q Q 1ron Marganese M M M M M M M M M M M M M M l QM Q Q Q Q M M M M M M M M M M M M M M M M M M calcium M M M M M M M M M M M M M M
'4 M M M M Magnesium M M M M M M M M M M M M M M M M M M M Al uminum Q Q Q M M M M N Cadmium Q O Q Q Q Q Q Q Q Q Q Q Q Q Q q Q Q Q Q Q Q Q Q Chromium y Q Q Q Q Q Q Q Q Q Q Q Q y Q Coppe r Q Q l*dd Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q 4 Q Q 4 Potassium Q Q Q Sodium Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q E 21ne Q Q Q Q
Mercury Q Q Q Q Q Q Q Q Q Q Q [ Q Q Q Q f t l'ME STUDI ES tontinuous Temp. C C C Napping (2) Q Q Q Q Q PLANKTON Q Ent ratnaent Zoop!ankton EM "" " " Phytoplankton BM BM BM LM Surveillance Zooplankton M M MM M M M M M M Phytoplankton BM BM IM 3M BM BM BM BM BM PERIPHYTIM M M M M M M BENDiOS Q Q Q Q Q Q Q Q o DISSOLVED GASES W W W W W $m , FISHESI3) 0 5t
'
(1) See Section 1.3.1 (2) Apr J.eximately 25 additional anations will be sampled. ( 3) See Southeast Reservoir Investle;ations Reporte (Appendices C & D) KEY M-Monthly year); (MMimm W-Win of 10 ar period times (Nov.-April), monthly per year with a period not to exceed 45 days between resples); C-Gotinuously; u-yuarterly; BM-Bi-Monthly (6 times per e
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Eo \' LAKE HARTWELL e# /g YONITORING STATION S 1,3-6 o i a 3 4 e ONS 12/76 SCALE IN MILE S
1.3.1 Water Quality Specification: A. Synoptic water quality surveys at nine (9) sampling stations on Lake Keowee, four (4) stations on Lake Hartwell and a station on the Keovee River between the lakes shall be conducted. Sampling locations are shown on Figure 1.3-1 and Figure 1.3-2, and required sampling parameters are listed in Table 1.0-1. Temperature and dissolved oxygen measurements shall be made at 0.3, 1.5, 5.0, 6.5, 8.0, 10.0 meters and thereafter every 2.5 meters to one meter off the bottom
~
for lake samples. BOD measurements on Lake Keowee shall be taken at 0.3 meters, 3.0 meters, and bottom depths. BOD measurements on Lake Hartwell shall be made on samples which are a composite of water from 0.3 meters, mid depth and bottom depths. All other specified para-meters shall be measured at a minimum of three depths for each lake sampling station. At sampling station 605 (Figure 1.3-2), the Keowee River shall be sampled from 0.3 meters. (Duke Power Company 1973a) I. INTRODUCTION A discussion of the importance of a synoptic water quality program has been presented previously by Duke Power Company (1973b). : II. METHODS AND MATERIALS Current analytical methods, preservation techniques, detection limits and reporting units used for Lake Keowee and Lake Hartwell samples are , presented in Table 1.3.1-1. Data for Lake Keowee and Lake Hartwell l appear in Appendix A, Sections I-IV. l l In September 1976, oxidation-reduction potential was added to the in, situ parameters. The method utilizes a silver-silver chloride reference electrode (Hydrolab Corp 1973). Light meter readings were not obtained during May and November due to instrumentation problems. In March of 1976, due to unsafe levels of phenol vapors, the analyses of ammonia nitrogen were discontinued pending an evaluation and correction of the problem. In July 1976 the method was changed from the Berthelot reaction to the Salicylate /nitroprusside method. Ortho-phosphate concentrations were not reported in March 1976 due to a malfunction in analytical instrumentation. The quarterly analysis of nickel was discontinued in January 1976 because no variations in nickel concentrations were observed in previous samples. Trace metals were not analyzed in November due to a malfunction in instrumentation. 1.3.1-1 ONS 12/76
III. RESULTS AND DISCUSSION Lake Keowee Temperature Temperature isopleths for 1976 appear in Figures 1.3.1-1 through 1.3.1-4 for Locations 501.0, 502.0, 504.0, and 506.0. Lake Keowee generally exhibited secondary thermoclines in the epilimnion. This situation is commonly found in reservoirs frcm which water is drawn from the lower strata to generate power (Hutchinson 1957, Odum 1971). Such a situation , modifies the use of the terms epilimnion and hypolimnion with respect to thermal stratification. Distinct chemoclines existed in Lake Keowee throughout the stratJfied period. Consequently, the terms epilimnion and hypolimnion are used in this report to describe chemical stratification of the lake. A minimum surface temperature observed on Lake Keowee during 1976 occurred in January at Location 500.0 (10.0 C). However, the lowest mean lake temperature occurred in February (Table 1.3.2). Spring warming was gradual with the highest mean lake surface (27.2 C) and bottom (20.3 C) temperatures occurring in September. Stratification began in March and overturn was complete by November. Although the lake temperatures continued to drop after November, the difference between surface and bottom temperatures increased in the Keowee River arm. From April through August, surface temperatures at the ONS discharge (Location 508.0) were slightly lower than surfacu temperatures at either Location 501.0 or 506.0 (Figure 1.3.1-5). Maximum surface temperature difference between locations 501.0 and 508.0 occurred in December (7.4 C'). Vertical thermal gradients existed at Location 503.0 in January, November, and December; however, near isothermal conditions existed at this location during the remaining months of 1976. Maximum surface temperature '(29.8 C) at Location 508.0 occurred in September. Dissolved Oxygen Dissolved oxygen isopleths for 1976 appear in Figures 1.3,1-6 through 1.3.1-9 for Locations 501.0, 502.0, 504.0 and 506.0. Maximum dissolved oxygen concentrations (11.8 mg/1) existed in February; however, surface dissolved oxygen concentrations aver. aged 10.6 mg/l for both January and - February. As thermal stratification progressed, the dissolved oxygen concentrations decreased steadily throughout the lake until lake mean concentrations reached 5.1 mg/l in August. Anoxic conditions existed in the hypolimnion of Lake Keowee during July and August. Fall overturn was acccmpanied by increasing dissolved oxygen concentrations in the hypolimnion. Dissolved oxygen concentrations were relatively homogeneous from surface to bottom in November when overturn was completed. Location 508.0 surface dissolved oxygen concentrations were generally less than concentrations at Locationa 501.0 and 506.0 from January through November (Figure 1.3.1-10). From April through October concentration 1.3.1-2 ONS 12/76
. .
. - _ .-. _ -.
differences between the ONS discharge (Location 508.0) and the two i reference locations (501.0 and 506.0) were greater than those observed from January through March. In November, the differences between dis-solved oxygen concentrations at Locations 501.0 and 508.0 were less than 0.1 mg/1. Minimum surface dissolved oxygen concentrations occurred during August in the intake canal (3.7 mg/1) and the ONS discharge (4. 3 mg/1) . 1 , A more detailed presentation of temperature and dissolved oxygen variations 4 is presented in Section 1.6 of this report and Section 1.3.1, Specification A (continued).
.
pH Lake Keowee pH values rarely exceeded 7.0, indicating the lake was mildly acidic. However, during June and July epilimnetic pH values in the Little River arm were slightly basic suggesting increased biological activity (Section 1.3.4). Generally, the Keowee River arm did not exhibi-these increases in pH and remained mildly ac.4.dic throughout most of the year. In November, the pH range for Lake Keowee was 5.4 to 7.9 (Figure , 1.3.1-11). This increase in pH occurred at the same time as an increase in phytoplankton densities (Section 1.3.4). Lake Keowee returned to its
,
mildly acidic character in December, with a pH range from 6.0 to 6.4. Surface pH values at Location 508.0 were slightly lower than those ooserved
; at Location 501.0. As observed in previous years, the Little River arm possessed slightly higher pH values than those observed in the Keowee , River arm (Duke Power Company 1974a, 1974b, 1975a).
Turbidity i A mean lake turbidity of 13 JTU indicated Lake Keowee was relatively free of particulate material during 1976. Occasionally bottom samples were contaminated with sediment resulting in abnormally high turbidities. Minimum turbidity values were recorded in thy (lake mean of 5 JTU). Turbidity values increased in the hypolimnion from July through' October indicating an increase in particulate material. In December, turbidity values returned to a homogeneous state throughout the lake. Specific Conductance
.
Specific conductance for 1976 was generally _less than 25 pmhos/ cm. Single highest specific conductance was 200 unhos/cm which occurred at the l
'
bottom of Location 50'.0 in September and_was attributed to sediment in the probe. An incre . in specific conductance occurred in the hypolimnion
-
from July through k t obo r. This' elevated conductance was accompanied by an increase in ionic .. istituents in the hypolimnion. This fact coupled
.
with increased? turbidity'from July through October indicated release of organic matter from the sediment. By December.-specific _ conductance values
.roturned to a homogeneous state wu % a_ lake mean of-18 pmhos/cm.
1.3.1-3 ONS 12/76
. _ _
. .-
Phosphorus l 4 Low phosphorus concent itions were recorded for Lake Keowee throughout 1976. Mininal spatial and temporal variations were recorded in ortho-phosphate concen.tations due to the extremely low concentration levels. Generally natura' lations in total phosphorus (0.005 to 0.089 mg/1-P) were recorded ou.ing the study period. However, the highest value (0.26 mg/1-P) was observed near the surface at Location 501.5 in July. This value was accompanied by an increase in pH and dissolved oxygen as well as a slight decrease in silica. Although phytoplankton were not < sampled at this location, these chemical cha ges indicated increased . biological activity. Total phosphorus appeared to exhibit slight vertical stratification in July. In August, total phosphorus was uniformly distributed (0.010 mg/1) throughout the lake. Minimum total phosphorus concentrations throughout the lake were recorded in September (0.006 mg/1).
- Nitrogen Ammonia was not naalyzed from March through June; consequently, any evaluation of the data was based on the remaining eight months of 1976.
1 The mean ammonia concentration of Lake Keowee for 1976 was 0.11 mg/1-N. l In January, ammonia concentrations were relatively homogeneous vertically i throughout the lake. However, elevated ammonia concentrations were ob-served in the Little River arm in February. These higher concentrations appeared to follow a point source trend extending from Location 500.0. When analyses resumed in July, hypolimnetic ammonia concentrations were
!. increased at Locations 500.0, 501.0 and 507.0. By August, elevated hypolimnetic ammonia concentrations were observed throughout the lake.
i This was accompanied by increased reducing conditions in the hypolimnioa j of Lake Keowee as evidenced by lower oxidation-reduction potentials. Ammonia concentrations had decreased by November to a mean of 0.048 mg/1-N. In December, ammonia concentrations were relatively homogeneous throughout the lake. , Highest ammonia concentrations at ONS discharge (Location 508.0) were
'
observed in August (location mean of 0.423 mg/1-N) and were accompanied by increased periphyton densities (Section 1.3.3). These higher concen-trations at the discharge corresponded to increased hypolimnetic ammonia , concentrations observed in the Lictie River arm during August. However, location means for 1976 revealed that the ONS discharge typically exhibited ammonia concentrations lower than those recorded at Location 501.0 and slightly higher than those at Location 506.0 (Figure 1.3.1-12). This
- phenomena was attributed to biological uptake and dilution of ammonia in the discharge water as it flowed toward Location 506.0.
Nitrate-nitrite concentrations ranged from 0.013 to 0.94 mg/1-N during 1976. Maximum lake concentrations occurred from January through March (Figure 1.3.1-13) and were associated Ach increased oxidation conditions I as a result of high dissolved oxygen cancentrations. The high lake mean in March was due'largely to elevated concentrations at Locations 501.0 i l 1.3.1-4 ONS 12/76 l i
, .. ._ _, .- -
_ --- - -
.
and 505.0. Following March, lake concentrations showed only slight variations until July. A vertical gradient with increased hypolimnetic concentrations existed in July and August. The lake mean concentrations diminished to 0.052 mg/1-N in September. This decrease in concentration was associated with increased reducing conditions and subsequent increased ammonia concentrations in the hypolimnion at this time. As fall overturn occurred and oxygenated water was returned to the lower depths, lake concentrations began to rise. By December, nitrate-nitrite concentrations had increased to a mean of 0.083 mg/1-N. The Little River arm exhibited slightly higher nitrate-nitrite concentrations than those observea in the Keowee River arm (Figure 1.3.1-12). Surface , nitrate-nitrite concentrations at ONS discharge were slightly higher than those observed at the surface of the reference locations (501.0 and 506.0). However, the concentrations observed on the surface of ONS discharge correspond to thosc observed in the hypolimnion of the Little River arm. Minerals A mean hardness of 6 mg/1-CACO 3 was recorded for Lake Keowee and was similar to 1975 observations (Duke Power Company 1975b). The annual molar percentages of the major mineral constituents were: bicarbonate (38%), sodium (15%), silica (13%), chloride (11%), calcium (9%), magnesium (5%), potassium (4%), aluminum (3%), iron (1%), and manganese (1%). Silica, bicarbonate, calcium, sodium, potassium, magnesium and chloride showed little spatial or temporal variations, uowever, iron and manganese varied to a greater degree both spatially and temporally than the above mentioned constituents (Figures 1.3.1-14 and 1.3.1-15). Mean lake iron concentrations reached a minimum in May (0.13 mg/1) and a maximum in October (0.56 mg/1). Maximum concentrations observed in October were attributed to elevated concen' rations in the hypolimnion of Lake Keowee. These elevated values were a result of lower hypolimnetic dissolved oxygen concentrations and increased turbidity. Both conditions generally accompany release of material from the sediment. In December, iron concentrations had decreased to a mean of 0.27 mg/l and were relatively homogeneous from surface to bottom. Mean lake manganese concentrations were at a maximum in September (0.34 mg/1), and were a result of elevated hypolimnetic values. Since manganese is reduced at a faster rate than iron, it was reasonable that manganese would reach its maximum concentration prior to iron. Increased oxidation in November and December resulted in a decrease in manganese concentrations to 0.1'4 mg/l in November and 0.04 mg/l in December. Iron and manganese exhibited similar spatial trends (Figure 1.3.1-14). Fbximum concentrations for these minerals occurred at Locations 500.0 and 505.0. Generally, the ONS discharge (Location 508.0) had lower iron and manganese concentrations than either Location 501.0 and 506.0 due to oxidation at the discharge. l.3.1-5 ONS 12/76
_ Lake Hartwell Tempera ture Temperature and dissolved oxygen isopleths for Locations 601.0, 603.0 and 604.0 are presented in Figures 1.3.1-16 through 1.3.1-18. Minimum temperatures on Lake Hartwell occurred in January (mean surface, 10.0 C; mean bottom, 8.4 C). Location 602.0 showed the lowest vertical temp-eratures. The lake warmed gradually through the spring until maximum temperatures were observed in August. Location 601.0 was stratified in June, July, and August with vertical gradients of 11.1 C*, 9.9 C", . and 8.5 C", respectively. The remaining locations on Lake Hartwell did not exhibit as distinct a stratification pattern as Location 601.0 due to their shallow depths. Overturn was completed by November as shown by the existence of near isothermal conditions (<1.0 C*, vertical AT) at all locations. Surface temperatures at Location 605 generally followed a similar temporal pattern to that observed at the ONS discharge (Location 508.0) on Lake Keowee (Figure 1.3.1-19). This indicated the influence of ONS operation on Lake Hartwell. Moreover, surface teuperatures at Locations 601.0 and 603.0 followed seasonal variations similar 'to Locations 501.0 and 506.0. Consequently, the majority of Lake Hartwell was not affected by ONS operation. Dissolved Oxygen Maximum surface dissolved oxygen concentrations were observed in February. Surface dissolved oxygen decreased only slightly until July; however, a steady hypolimnetic decrease in dissolved oxygen occurred until August. Anoxic conditions were observed initially at Location 601.0 in June. By August, anoxic conditions existed at Locations 601.0, 602.0, 603.0, 604.0. By October, dissolved oxygen concentrations in the bottom water increased to greater than 5.0 mg/1. All locations exhibited homogeneous dissolved oxygen concentrations by December. Location 605.0 exhibited lower surface dissolved oxygen concentrations than Locations 601.0 or 603.0 from April through September (Figure 1.3.1-20). Dissolved oxygen concentrations at Location 605 generally followed a seasonal pattern similar to that observed at Location 508.0 on Lake Keowee. The surface concentrations at Location 605.0 were not as low as those observed at Location 508.0. Location 601.0 exhibited lower surface dissolved oxygen concentrations than 605.0 from October through December (Figure 1.3.1-20). pH Natural variations (5.6 to 7.9) in pH occurred on Lake Hartwell during the study period. Generally, a distinct decreasing vertical gradient g existed on Lake Hartwell during thermal stratification. 1.3.1-6 ONS 12/76
-. -
Phosphorus Nutrient concentrations in Lake Hartwell were similar to Lake Keowee during 1976. Ortho-phosphate was the least abundant nutrient (0.008 mg/1-P mean). Total phosphorus renged from 0.005 to 0.155 mg/1-P and exhibited only slight spatial and temporal variations. The highest total phosphorus value (0.155 mg/1-P) occurred near the surface of Location 602.0 in July. This increased concentration was not accompanied by increases in any other parameters; consequently, this value was attributed to sample contamination at this location.
.
Nitrogen Ammonia concentrations for 1976 averaged 0.251 mg/1-N. Increased hypolimnetic ammonia concentrations during thermal stratification were largely responsible for this high mean concentration. These increased hypolimnetic concentrations were accompanied by anoxia in the same region. By November, the ammonia values had decreased to a mean of 0.092 mg/1-N. Nitrate-nitrite concentrations wera relatively low during 1976 with a mean of 0.129 mg/1-N. Only slight increases in nitrate-nitrite concen-
trations were recorded during thermal stratification. Due to the depth of Location 601.0, stratification in both ammonia and nitrate-nitrite was more extensive than the other locations on
- Lake Hartwell.
Minerals . Lake Hartwell appeared to be a soft water reservoir as evidenced by a mean hardness of 7 mg/1-CACO 3 (Hem 1971). The annual molar percentages of the mineral constituents on Lake Hartwell were bicarbonate (35%), sodium (16%), chloride (14%), calcium (13%), and silica (11%). Iron and manganese constituted less than three percent of the minerals measured on Lake Hartwell. However, both iron and manganese exhibited increased hypolimnetic concentrations during thermal stratification. These increased hypolimnetic concentrations were more pronounced at Locations 601.0 and 602.0 than at the other locations sampled. Comparison of Lake Keowee and Lake Hartwell Limnology Stratification and turnover occurred at approximately the same time on Lake Keowee and Lake Hartwell. Chemically, Lakes Keowee and Hartwell were similar. Temporal and spatial distribution of both nutrients and
. minerals followed classical patterns (Hutchinson 1957) on both lakes.
The major exception in the spatial comparison of the two lakes.is the apparent point source input of nutrients at Location 500.0 on Lake Keowee. 1.3.1-7 ONS 12/76-
Effects of ONS Seasonal temperature variations on Lake Hartwell approximated those of a classical lake (Hutchinson 1957) more closely than those of Lake Keovee. The major thermal differences between the two lakes were attributed to the operation of ONS and Jocassee Pumped Storage. Although temperature and dissolved oxygen concentrations in the upper reaches of Lake Hartwell (Location 605.0) were influenced by ONS operation, the majority of the lake was not directly influenced by ONS operation.
-
IV.
SUMMARY
AND CONCLUSIONS Limnology Lake Keowee did not follow classical patterns in the formation of summer thermoclines. The presence of secondary thermoclines was attributed to ONS and Jocassee Pumped Storage operations which induced partial destratification of the lake. Lake Keowee was a soft water lake with relatively low nutrient content. The Little River arm typically exhibited slightly higher nutrient concentrations than the Keowee River arm. In 1976 data, as in the past, it was apparent that these higher nutrients emanated from the vicinity of Location 500.0. Temporal and spatial distributions of nutrients and minerals followed similar patterns as classical lakes described by Hutchinson (1957). Effects of ONS, Evaluation of water chemistry data,1971 through 1976, revealed that the operation of ONS caused complex stratification of the lake (Hutchinson 1957). The operation of ONS produced surface temperatures at the discharge (508.0) which were warmer than those observed at the reference locations (501.0 and 506.0) during destratified periods. However, during stratified periods, hypolimnetic withdrawal by ONS produced cooler surface temperatures at the discharge (508.0) than those observed at the reference locations (501.0 and 506.0). This resulted in an increase of temperatures in the intermediate and lower strata of the lake. Another effect of ONS operation was the transport of nitrogen enriched hypolimnetic water from the Little River arm to the epilimnion of the Keovee River arm. However, these increased nitrogen concentrations were only observed in the immediate vicinity of the discharge. Phosphorus did not exhibit this trend of increased concentrations in the discharge area. These effects of ONS operation in the Keowee River arm were countered by biological uptake, dilution and mixing due to station operation. The operation of ONS did not appear to produce any major effects on the water chemistry of Lake Keowee. 1.3.1-8 ONS 12/76 ,
LITERATURE CITED Duke Power Company. 1973a. Appendix B to Facility Operating License Nos. DPR-38, DPR-47, and DPR-55, Technical Specifications for the Oconee Nuclear Station Units 1, 2, and 3 Duke Power Company. U. S. Atomic Energy Commission, Docket Nos. 50-269, 50-270, and 50-287 (revised August 1,1975, NRC), Washington, D. C. .
. 1973b. Oconee Nuclear Station. Semi-Annual Report, Period Ending June 30, 1973.
. 1974a. Oconee Nuclear Station. Semi-Annual Report, .
Period Ending June 30, 1974. ___. 1974b. Oconee Nuclear Station. Semi-Annual Report, Period Ending ' December 31, 1974. .
. 1975a. Oconee Nuclear Station. Semi-Annual Report, Period Ending June 30, 1975.
.
1975b. Oconee Nuclear Station. Semi-Annual Report, Period Ending December 31, 1975. Hem, J. D. 1971. Study and interpretation of chemical characteristics of natural water. Geological Survey Water Supply Paper 1473. U. S. Department of the Interior, Washington, D. C. 363 p. Hutchinson, G. E. 1957. A Treatise on Limnology. Vol. I, Wiley, New York. 1015 p. Hydrolab Corporation. 1973. Instructions for operating the Hydrolab Surveyor Model 6D in situ water qtality analyzer. Austin, Texas. 146 p. Odum, E. P. 1971. Fundamentals of ecology. W. B. Saunders Company. Philadelphia, Pa. 574 p.
I 1.3.1-9 ONS 12/76
.
I 1 I 1.3.1 WATER QUALITY Specification: A (continued) Dissolved oxygen will also be measured weekly from May through November at three locations: (1) the Oconee discharge, (2) the lake surface (0.3 meter depth) at the Keowee intake structure, and (3) the Keowee tailrace during hydroelectric plant operation. (Duke Power Company, 1973a). I. INTRODUCTION
*
.
ONS utilizes a hypolimnetic withdrawal (discussed previously, Duke Power Company, 1973c) from Lake Keowee for its condenser cooling water. During periods of lake stratification (May through November), this withdrawal of cool bottom water is low in dissolved oxygen (D0) and its subsequent discharge to the surface of Lake Keowee is the basis for the above Specification. II. METHODS AND MATERIALS Dissolved oxygen content and temperature levels were monitored weekly (duplicate samples) in Lake Keowee and the Keowee River from the following facility structures: ONS intake and discharge, Keowee Hydro Station intake and tailrace, and the S.C. Hig7way #183 Bridge (Station 605) . The methods and materials described previously (Duke Power Company, 1973b) were employed for D0 analysis. Station biologists performed the sampling and analyses. . III. RESULTS AND DISCUSSION The results of the weekly D0 monitoring program plus the associated percent saturation values and temperature measurements are pre-sented in Table 1.3.1 -3. Figure 1.3.1-21 illustrates the dissolved oxygen values for the five monitoring stations during the 1976 reporting period. Dissolved oxygen values for the ONS intake ranged from a low of 4.2 mg/l on August 19 to a high of 9.0 mg/l on November 24. DO values for the ONS discharge ranged from a low of 4.4 mg/l on August 19 to a high of 8.8 mg/l on May 6. The lowest value recorded for the Keowee Hydro intake, 5.3 mg/1, occurred on August 12. The lowest value of dissolved oxygen recorded for the Keowee Hydro discharge and Station 605 was 5.9 mg/1, recorded at both stations on September 2. Dissolved oxygen percent saturation values for'the ONS discharge ranged from 58.6 to 96.0%. Dissolved oxygen conditions less than 5.0 mg/l for the ONS intake and discharge extended from July 29 through September 2. Dissolved oxygen values for the Keowee Hydro intake did not fall beneath 5.0 mg/l (5.3 mg/l being the lowest value recorded on August 12) during the 1976 reporting period.
- 1.3.1-10 ONS 12/76 I~
l
Dissolved oxygen values at the ONS intake were slightly higher this reporting period than in the 1975 reporting period (Duke Power Company, 1975a, 1975b). The lowest value recorded at the ONS intake for 1976 was 4.2 mg/l on August 19 while in 1975 the lowest value reported was 3.6 mg/l on September 11. The duration of low dissolved oxygen (less than 5 mg/1) extended over a longer period in the 1976 reporting period, July 29 to September 2, as compared to 1975, August 14 through September 11. Temperatures for the ONS intake were slightly lower and peaked earlier for the 1976 re-porting period as compared to the same period in 1975. A high of 1 25.1 C was recorded on September 2, 1976 compared to a high of 26.0 C on September 11, 1975.
'
IV.
SUMMARY
AND CONCLUSIONS A general increase in dissolved oxygen values can be attributed to the following: (1) ONS discharge water mixing with lake water in the discharge cove; (2) aeration in the discharge cove; and (3) mixing and aeration in the Keowee Hydro tailrace during the opera-tion of the Keowee Hydro Station. With respect to dissolved oxygen, the impact of a hypolimnetic withdrawal and subsequent discharge to the surface waters of Lake Keowee is restricted to the immediate area of the ONS discharge cove. The short duration of conditions when the dissolved oxygen content was less than 5.0 mg/l and the relatively small area of Lake Keowee affected is not expected to appreciably affect the aquatic biota of the lake. LITERATURE CITED l Duke Power Company. 1973a. Appendix B to Eacility Operating License Nos. DPR-38, DPR-47, and DPR-55, Technical Specifications for the )
!
Oconee Nuclear Station Units 1, 2, and 3, Duke Power Company. U. S. Atomic Energy Commission, Docket Nos. 50-269, 50-270, and 50-287 (revised April 9, 1976, NRC), Washington, D. C. Duke Power Company. 1973b. Oconee Nuclear-Station. Semi-Annual Report, Period Ending June 30, 1973.
.
1973c. Oconee Nuclear Station. Semi-Annual Report, Period Ending December 31, 1973.
.
1975a. Oconee Nuclear Station. Semi-Annual Report, Period Ending June 30, 1975.
.
1975b. Oconee Nuclear Station. Semi-Annual Report, Period Ending December 31, 1975. Elmore, H.L. and T.W. Hayes. 1960. Soluability of Atmospheric oxygen in water. J. Sanit. Eng. Div. Amer. Soc. Civil Eng. 86th (SA4): 41-53. 1.3.1-11 ONS 12/76
1.3.1 WATER QUALITY Specification: B. Water temperature recording stations shall be established at Stations 502, 503, and 504. Temperature shall be monitored in a multi-point vertical profile, accurate to 0.5'C. Sensors shall be placed at a depth of 0.3 meters below the surface, on the bottom, and at a minimum of six (6) intervals to describe the temperature profile. A fourth temperature recording station shall be estab-lished to monitor the waters discharged from Lake Keowee through the Keowee Hydro Plant (Duke Power Company, 1973a). . I. INTRODUCTION Discussion of the significance of continuous temperature monitoring has
,
been presented (Duke Power Company, 1973b). II. METHODS AND MATERIALS Station 502.0, 503.0, 504.0, Keowee Tailrace , The methods and materials used in monitoring the water temperature profile at these staticas have been described (Duke Power Company, 1973c). Data Reduction The method of data reduction used for Stations 502.0, 503.0, 504.0, and Keowee Tailrace have been described (Duke Power Company, 1973c). III. RESULTS AND DISCUSSION The tabulated temperature data for the Keowee Tailrace and Stations 502.0, 503.0, and 504.0 are presented in Appendix A. Section V. A comparison of the 1976 summer mean monthly temperature profiles with those of 1973 (Duke Power Company, 1973b, 1973c) reveals that the lake has lost its characteristic of a distinct thermocline for this time of year. Instead of the normal "S" shape curve for summer stratification of a subtropical lake (Hutchinson, 1957) there is a gradual temperature gradient from the surface to the bottom with relatively little variation in slope. This is illustrated in Figure 1.3.1-22 which depicts a graph of the mean temperature versus depth for the months of July 1973 and July 1976 at Station 503.0. Using the data in Appendix A. Section V, the following water temperature trends were observed for Stations 502.0, 503.0, and 504.0. From April through August 1976, the mean monthly surface temperature was colder for Station 504.0 (in the ONS discharge plume) than for Station 502.0 (at the skimmer wall). During the remainder of the year, the mean monthly 1.3.1-12 ONS 12/76
surface temperature was warmer for Station 504.0 than for Station 502.0. The highest daily surface temperature was 31.6 C at Station 502.0 during July. Except for January and February of 1976, the average monthly bottom temperature at 502.0 was warmer than Station 503.0 and 504.0. The maximum bottom temperature (22.8 C) occurred during September at Station 502.0. Station 502.0 was near isothermal during the month of September (Figure 1.3.1-23). It occurred earlier than the fall turnover of the remainder of the lake.
.
Table 1.3.1-4 is a summary of Keowee Tailrace temperature data compiled in Appendix A, Section V. This table indicates the differences between temperatures recorded during hydro generation and those recorded during "no-generation" periods of the same day. For each month, the mean of these differences and the maximum daily difference are presented. These differences showed that temperatures recorded during generation were consistently higher than those during "no-generation." The mean differences were between 0.2 C' and 2.3 C' while maximum differences were between 1.0 C' and 3.6 C'. These differences were computed only for the days in which hydro power generation occurred. IV.
SUMMARY
AND CONCLUSIONS The ONS condenser cooling water system utilizes a skimmer wall. The inverted dam results in the condenser cooling water being pulled off the bottom of the lake, heated up in the ONS condenser, and discharged on the surface. During the spring and summer lake stratification, the hypo-limnetic withdrawal by ONS removes the cold bottom layers of water which are replaced by the warmer upper layers. During part of this period, the ONS discharge water was colder than the surface receiving water. This ONS-induced mixing of the lake was evidenced by the absence of a distinct thermocline and the reduction of the temperature difference between the surface and the bottom of the lake at Stations 502.0, 503.0, and 504.0. A mean increase of approximately 1.1 Co occurred in the Keowee Hydro tailrace temperature from non-generating to generating periods within each day during which generation occurred.
1.3.1-13 ONS 12/76
__
)
LITERATURE CITED Duke Power Company. 1973a. Appendix B to Facility Operating License
.Nos. DPR-38, DPR-47, and DPR-55 Technical Specifications for the Oconee Nuclear Station Units 1, 2, and 3, Duke Power Company. U. S.
Atomic Energy Commission, Docket Nos. 50-269, 50-270, and 50-287 (revised August 1, 1975, NRC), Washington, D. C.
. 1973b. Oconee Nuclear Station. Semi-Annual Report, Period Ending June 30, 1973.
*'
. 1973c. Oconee Nuclear Station. Semi-Annual Report, Period Ending December 31, 1973.
Hutchinson, G. E. 1957. A Treatise on Limnology. Vol. I, Wylie, New York. 1015 p. ' 4 ! ! l ' l 1.3.1-14 ONS 12/76
.
. . . . . _ __ _. . . . _ _ _ . _ _. -__m___ _ . . . , _ ,_, - _ _ _____ ._ _ ____m .._m._m
_ _ ._ _ _ _ _._. - _ _ __ _ _ _ _ __ _ _ _ _ _ _ _ . _ ._. . _ Table 1.3.1-1 Analytical Methods for Chemical Parameters Measured on Lake Keowee and Lake Hartwell
,-
l ' Preservation Detection (' Parameter' Hethod Referance Technique 1.imit
-Alkalinity, total Method 403 A.P.H.A. et.al., 1975 4C 1 mg/1-CACO 3 a >
' Aluminum,'. total Atomic Absorption-direct aspiration Perkin-Elmer Corp., 1973 HNO3 0.1 mg/l
;. -
. Atomic Absorption-graphite furnace Perkin-Elmer Corp., 1973 HNO3 0.1 mg/l
.
Ammonia Cas diffusion electrode Orion Research Inc., 1970 4C 0.01 mg/1-N Method 98-70W Technicon Industries Systras, 1972 4 C, filtration 0.005 mg/1-N Biochemical oxygen demand. Method 507 A.P.H.A. et.al., 1975 4C 0.5 mg/l Cadmium,' total Atomic Absorption-graphite furnace Perkin-Elmer Corp., 1973 m3 0.1 pg/l Calcium, total Atomic Absorption-direct aspiration Perkin-Elmer Corp., 1973 HNO3 0.01 ag/l .
"
. Chloride, soluble Specific lon Electrode Orion Research Inc., 1970 none 0.35 mg/l
{ Method 99-70W Technicon Ind. Systems, 1972 none 0.3 og/l l ' U e Chromium,' tota'i . Atomic .ibsorption-graphite furnace Perkin-Elmer Corp., 1973 HNO 3 1.0 pg/l-Conductance, specific , Hydrolab Surveyor 6-D Hydrolab Corp., 1973 in situ I pahos/cm Method 205 A.P.H.A. et.al., 1975 4C 1 pahos/cm ' Copper, total. Atomic Absorption-direct aspiration Perkin-Elmer Corp 1973 IINO3 0.1 ag/l Atomic Absorption-graphite furnace Perkin-Elmer Corp., 1973 HNO3 1.0 pg/l Hardness, total Method 309A A.P.H.A. et.al., 1975 none 1 ag/1-CACO 3 1 fron, total Atomic Absorption-direct aspiration Perkirt-Elear Corp., 1973 0.01 mg/l HNO3 lead, total- Atomic Absorption-graphite furance Perkin-Elmer Corp., 1973 HNO3 1 pg/l Magnesium, total Atomic Absorption-direct aspiration Perkin-Elner Corp., 1973 HNO3 0.01 ag/l Manganese, total Atomic Absorption-direct aspiration Perkin-Elmer Corp., 1973 HNO3 0.01 mg/l o Mercury, total Flameless Atomic Absorption U.S.E.P.A., 1974 HNO3 0.1 pg/l
-5
-
_. 3
.
.
T
,
_ _ _ _ _ _ _ . _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ . _ _ _ . _ _ _ _ _ _ . _ . _ -. .. , - . , - 3
___ _ _ _ _ _ _ . _ . _ _ _ _ _ _ _ . _ _ _ _ __ , _ _ __ __ . _ _ _ . _ . _ . _ _ _ _ _ . __.. _ . .__ .,_ .__m _ _ . . _ _ _ _ _ . _ . . m_ _ , . . . . _ m , . _ _ . _ . 4. e-Table 1.3.1-1 (Cont.) Analytir.nl Ntreods for Chemical Parameters , Measured m Lake Keowee and lake Hartwell 4 Nitrate-nitrite Method 158-71W Technicon Ind. Systems,1972 4 C, filtration 0.02 mg/l p Orthophosphate, soluble Method 155-71W Technicon Ind. Systems, 1972 4 C, filtration 0.005 mg/1-P
, Oxidat ion r .educ tion - Hydrolab Surveyor 6-D Hydrolab Corp., 1971 in situ -1000 av 3 pstentials Oxygen, dissolved Hydrolab Surveyor 6-D Hydrolab Corp., 1971 in situ 0.0 mg/l A.P.H.A. et.al. 19 i
pH Hydrolab Surveyor 6-D Hydrolab Corp., 1973 in situ 0.1 pH unit Method 442 A. P.H. A. et .al . , 19 7 5 4C 0.1 pH unit Phosphorus, total Method 00665 U.S.E.P.A., 1974 4C 0.005 mg/l-P
' Potassium, total Atomic Absorption-direct aspiration Perkin-Elmer Corp., 1973 HNO3 0.5 mg/l Silica, soluble - Method 105-71W Technicon Ind. Systems,1972 4C 0.2 mg/1-Si
' Sodium, eocal Atomic Absorption-direct aspiration Perkin-Elmer Corp., 1973 HN0g 0.2 agfl Traperature Hydrolab Surveyor 6-D Hydrolab Corp., 1971 in situ -5.0 C
. Method 212 A.P.H.A. et.al., 1976 in situ -1.0 C Turbidity Monitek Turbidimeter Monitor Tech. Inc., 1973 4C 1.0 .I.T.U.
Zinc, total Atomic Absorption-direct aspiration Perkin-Elmer Corp., 1973 HNO3 10 pg/l
.
b t f '
.@
.
O. a
.
_ _ _ . _ _ _ _ _ _ _ _ _ . _ _ _ _ _ _ _ _ . _ _ __ _ __
__ _ - . __
. . . _
O Table 1.3.1-1 (Cont.) Analytical Methods f'or Chemical Parameters Measured on Lake Keowee and Lake Hartwell American Public Health Association (APRA), American Water Works Association (AWWA) and Water Pollution Control Federation (WPCF). 1971. Standard methods for the examination of water and wastewater. 13th ed. Amer. Public Health Assoc., Washington, D. C. 874 pp. Hydrolab Corporation. 1973. Instructions for operating the Hydrolab - Surveyor Model 6D irl situ water quality analyzer. Austin, Texas. 146 pp. Monitor Technology, Inc. 1973. Monitek laboratory turbidimeter-Model 150-Operating and maintenance instructions. Redwood City, Calif. 13 pp. Montedora-Whitney Corporation. 1974. Operating instructions and maintenance manual for solar illuminance meters. Models LMA-8A, LMD-8A, and LMT-8A. San Luis Obispo, Calif. 5 pp. Orion Research Incorporated. 1970. Instruction manual. Cambridge, Mass. n.p. Perkin-Elmer Corporation. 1973. Analytical methods for atomic absorption spectroscopy using the HGA graphite furnace. Norwalk, Conn. n.p. Perkin-Elmer Corporation. 1973. Analytical methods for atomic absorption spectrophotometry. Norwalk, Conn. n.p. . Technicon Industrial Systems. 1972. Operation manual for the Technicon Autoanalyzer II System. Technical Publication No. IAl-0170-20. Tarrytown, N. Y. n.p. U. 3. Environmental Protection Agency. 1974. Methods for chemical analysis , of water.and wastes. Office Technol. Transfer, Washington, D. C. 298 pp. i 1.3.1-17 ONS 12/76
.
9
Table 1. 3.1-2 Descriptive Statistics for Lake Keowee for 1976. January February March April
,
han Maximum Minimum Mean Maximum Minimum Mean Knximum Minimum Mean Reximum Minimum T2mperature 11.4 17.5 8.8 11.0 13.9 8.5 12.2 18.0 9.1 14.1 17.5 9.9 Dissolved oxygen 10.2 !!.0 8.7 10.0 11.8 7.8 8.9 10.2 7.2 9.0 10.8 5.6 pl! 6.4 6.0 6.0 6.8 7.1 6.3 6.6 7.2 5.9 6.3 6.9 5.8 Specific Conductance 17 19 14 17 18 16 17 22 14 14 40 10.0 Alkalinity 8 9 7 9 14 7 8 13 7 8 9 7.0 Turbidity 22 480 5 12 175 4 6 32 3 11 62 4.0 Nitrate-nitrite .147 .458 .069 .178 .276 .125 .210 .102 .945 .119 .054 .198 Ammonia .102 .430 .042 .082 .196 .0 38 w
~ ortho-phosphate .009 .'014 .006 .007 .018 .005 .005 .005 .013 b C* Total phosphorus .018 .048 .007 .001 .020 .007 .018 .004 .330 .009 .005 ,02g tron .24 2.40 .040 .55 9.25 .110 .20 1.01 .0 30 . 19 3.71 .09 mnganese .04 .26 .010 .% 0.67 .010 .02 .38 .010 .o4 30 .01 Calcium .99 1.07 .850 . 42 1.74 1.21 1.66 'l.97 1.41 1.23 1.46 1.09 Magnesium .56 .64 .45 .50 .84 .43 .57 .78 .45 .51 .62 .42 Silica 3.61 3.88 3.19 3.61 3.81 3.38 3.27 4.01 2.79 3.83 4.11 3.49 8 . 3 a e
n 8 8 5 5 a s 2 0 0 9 ) 5 3 0 m 5 0 4 10 0 0 0 0 0 4 4 9 i n 2 0 5 ! 6 3 1 2 i 1 ! M s u 0 7 3 2 t 2 8 2 7 7 0 6 4 s m 8 5 5 3 7 0 0 6 9 3 9 9 ui . ga 8 8 7 2 7 5 3 1 3 3 u Am2 1 6 1 2 1 1 8 6 0 n 9 2 0 1 6 6 9 5 3 a 4 1 0 0 2 0 0 3 2 8 5 2 e M 3 5 6 7 8 l 1 3 2 1 I _m 0 6 5 5 u 2 2 0 0 8 3 9 0 m 1 0 6 0 0 0 0 10 0 5 3 9 i n 1 0 5 0 6 2 1 2 e i 1 1 M m 0 0 0 5 y u 5 2 2 5 3 3 4 0 0 l m 8 8 0 2 0 0 2 8 8 7 8 7 u i J x 7 9 8 4 ! 5 1 1 2 3 a 2 2 ! 8
. M 1 2 2 6 5 n 0 5 0 1 2 4 2 3 6
- 6. a 6 8 2 1 1 0 0 2 1 8 5 2 7 e 9 .M 0 5 6 4 7 2 1 3 1 2 1 1 r
o f
,m 8 5 6 e u 0 0 0 9 1 1 8 6 e m 0 4 8 2 0 0 0 0 1 3 4 w i
) o n 1 2 5 9 7 5 1 1
. e i 1 t K M n
o e C k ( I a. 2 m 3 6 %
- r u 7 1 3 8 5 7 4 9 1 o e m 2 1 0 2 0 0 1 8 7 8 f n i 5e. . b. . h.
3 uxa 7 9 8 1 4 0 2 1 3 s J t 2 2 1 7 1 c P 1 i e t l s b i a t 9 6 0 T a n 0 0 1 5 0 8 8 9 t a 2 3 4 1 0 0 3 1 3 4 0 S e . M 9 7 6 5 8 0 1 3 e 1 1 2 - v - i _ t _ p -
-
i m 2 7 6 . r u h 1 4 1 1 2 3 4 c m 5 8 0 0 0 0 0 0 0 0 4 8 s i J. e n 0 3 5. 1 i 2 1 2 D i 1 1 M
-
-
m 4 5 5 y u 5 0 0 9 0 0 9 7 a im 7 4 5 0 0 0 6 5 8 6 0 M - x 0 0 7 7 9 0 1 4 a 2 1 1 4
-
M . 1 5 9 n 1 0 0 3 5 7 2 6 . a 3 3 3 3 0, 0 1 0 2 5 2 _ e . . M
-
6 8 6 l 7 5 I 3 1 i
.
_ e c _ n _ a n t s e c . e e u g u t t r y d a o e o x n o ir t h p h p r u c y i s r d t y n o iu e m t e c i t - h s u a n l v i i e a p P e m i r l f i d t i - n u s a e u i l i a l a i e c p s c n. h r n. o. a n g c n i s . m i e k t t m lt t o n l g l e !1 p l u i n r o r a a i T D p S A l N A u T I N C M S
,
.
!' Om 89te
- - - __ _
Table 1.3.1-2 (Cont.) Descriptive Statistics for take Keewee for 1976. September October hovember Det'embe r
&an Mximum Minimum Mean Naimum Minimum Mean Lximum Minimum Mean M.aximum Minimum Tamperature 25.0 29.8 13.0 23.1 27.3 12.3 17.4 19.5 14.9 12.3 19.4 9.4 Dissolved oxygen 5.8 8.0 0.1 6.7 8.3 0.0 7.8 9.2 0.5 9.2 10.2 8.5 p!! 5.9 6.6 4.9 6.1 6.7 5.6 6.7 7.9 5.3 6.4 7.0 6.0 Specific conductance 22 200 11 16 35 13 18 24 15 18 21 15 Alkalinity 9 39 5 10 45 6 8 10 7 6 14 2 Turbidity 9 65 4 12 105 4 12 , 90 4 18 58 15 Nitrate-nitrite .052 .374 .013 .065 .257 .019 .066 .165 .016 .083 .136 .057
,
'
w Anmonia .191 .748 .020 .120 .820 .017 .048 .104 .012 .100 . 34 8 .021 L
/4 .005 O Ortho-phosphate .005 .008 .005 .005 .014 .005 .005 .011 .005 .005 .019 Total phosphorus .006 .020 .005 .008 .0 32 .005 .008 .049 .005 .007 .033 .005 Iron .36 5.6 .07 .56 11.8 .09 .35 3.74 .05 .27 .75 .00 Manganese . 34 2.09 .02 .30 3.0 .01 .14 1.0 .01 .04 .02 .01 Calcium 1.86 3.49 1.51 1.68 4.26 1.17 1.59 1.98 1.30 1.22 1. 32 1.04 Magnesium ,
.59 1.13 .15 .40 .94 .27 . 3t. .40 .26 .33 .39 .27 Silica 3.20 3.99 3.0 3.16 3.75 2.78 3.31 3.62 2.6 2.80 2.99 2.51 O
m ba 0e e _ - . - - - _ _ _ _ . -
Table 1.3.1-3 Page 1 of 6 Weekly DO Monitoring Program Oconee Nuclear Station May-November, 1976 DATE STATION
- TEMP.0C DO mg/l DO % Sat.**
5/6/76 Oconee Intake 15.0 7.8-7.9 78.3 Oconee Discharge 19.2 8.9-8.7 96.0 Keowee Hydro Intake 19.4 8.6-8.6 94.2 Keowee Hydro Discharge 18.1 9.8-9.8 104.5 Station 605 18.7 9.8-9.9 106.2
.
.
3/13/76 Oconie Intake 15.4 7.8-7.6 77.4 Oconee Discharge 19.8 8.5-8.5 93.8
,
Keowee Hydro Intake 19.9 8.3-8.5 92.9 Keowee Hydro Discharge 18.9 8.7-8.7 94.2 Station 605 18.9 8.8-8.6 94.2 5/20/76 Oconee Intake 14.6 7.3-7.0 71.1 Oconee Discharge 19.5 8.3-8.2 90.5 Keowee Hydro Intake 19.5 8.5-8.3 92.1 Keowee Hydro Discharge 17.9 9.3-9.8 101.4 Station 605 19.1 9.3-9.5 102.3 5/27/76 Oconee Intake 15.0 7.2-7.2 71.8 Oconee Discharge 20.5 8.3-8.3 92.9 Keowee Hydr- Intake 20.7 8.3-8.4 93.8 Keowes nydro Discharge 20.2 8.7-8.9 98.0 Station 605 20.1 9.5-9.5 105.6
~
6/3/76 Oconee Intake 15.7 7.0 6.8 69.8 Oconee Discharge 23.5 7.0-7.0 83.1 Keowee Hydro Intake 22.2 7.6-7.6 88.1 Keowee Hydro Discharge 21.0 7.5-7.6 85.4 Station 605 21.0 7.6-7.6 86.0
- Measurements were taken from facility structures.
** Values based on dissolved oxygen saturation values from air in dictilled water (Elmore & Hayes, 1960). % saturation values determined from average of the D0 mg/l replicates.
1.3.1-21 ONS 12/76
.
$ l
_ _ m ._ Table 1.3.1-3 (Ccit.) Page 2 cf 6 Weekly DO Monitoring Program Oconee Nuclear Sr.cion vav-November, 1976 DATE STATION TEMP.0C D0 mg/l DO % Sat. 6/9/76 Oconee Intake 16.1 6.2-6.5 64.9 Oconee Discharge 22.5 7.4-7.6 87.4 Keowee Hydro Intake 23.0 7.G-7.8 91.8 Keowee Hydro Discharge 21.3 8.3-8.4 95.0 Station 605 21.8 8.6-8.6 98.8 , i 6/16/76 Oconee Intake 18.0 6.4-6.6 69.1 Oconee Discharge 24.7 6.5-6.5 79.1 Keowee Hydro Intake 26.0 7.7-7.6 95.4 l Keowee Hydro Discharge 23.0 7.3-7.9 89.4 Station 605 23.2 7.6-7.5 89.2 4 6/24/76 Oconee Intake 18.0 6.3-6.2 66.5 Oconee Discharge 25.0 6.4-6.5 78.8 Keowee Hydro Intake 26.6 7.6-7.8 97.1 Keowee Hydro Discharge 22.7 7.5-7.5 87.7 Station 605 22.6 6.9-7.3 82.9 7/1/76 Oconee Intake 18.5 6.0-6.0 64.5 Oconee Discharge 25.6 6.1-6.1 79.2 4 Keowee Hydro Intake 26.0 7.7-7.6 95.4 Keowee Hydro Discharge 21.8 9.2-8.8 102.8 Station 605 21.6 8.5-9.0 100.1 7/7/76 Oconee Intake 19.0 6.3-6.2 67.9 Oconee Discharge 24.0 7.6-7.8 92.4 Keowee Hydro Intake 24.1 7.5-7.3 88.9 4 Keowee Hydro Discharge 23.0 7.6-7.3 87.6 Station 605 22.9 7.5-7.5 88.0 , f 1.3.1-22 ONS 12/76
.
l l f
Table 1.3.1-3 (Cont.) Page 3 of 6 Weekly DO Monito-ing Program Oconee Nuclear Sta* ion
- May-November, 15/6 DATE STATION TEMP.0C DO mg/l DO % Sat.
7/15/76 Oconee Intake 20.2 5.2-5.2 57.9 Oconee Discharge 26.8 5.2-5.3 66.4 Keowee Hydro Intake 28.5 7.6-7.6 99.3 Keowee Hydro Discharge 25.2 6.7-6.7 82.3 Station 605 25.2 6.7-6.8 82.9
.
7/22/76 Oconee Intake 20.3 5.1-5.1 58.0 Oconee Discharge 25.7 5.5-5.4 67.5 Keowee Hydro Intake 28.4 6.7-6.9 88.8 Keowee Hydro Discharge 24.8 7.1-7.2 87.1 Station 605 25.6 7.2-7.3 89.7 7/29/76 Oconee Intake 21.6 4.9-4.8 55.5 Oconee Discharge 25.8 5.1-5.3 64.6 Keowee Hydro Intake 28.7 7.0-7.3 93.8 Keowee Hydro Discharge 25.8 6.4-6.3 78.9
-
Station 605 26.3 6.0-6.0 75.2 8/5/76 Oconee Intake 21.3 4.4-4.3 49.5 Oconee Discharge 28.2 4.8-4.8 62.4 Keowee Hydro Intake 27.7 5.5-5.5 70.8 Keowee Hydro Discharge 26.5 6.8-6.8 85.5 Station 605 26.8 6.5-6.6 82.9 8/12/76 Oconee Intake 22.3 4.3-4.4 50.5 Oconee Discharge 28.7 4.5-4.5 59.0 Keowee Hydro Intake 29.0 5.2-5.4 69.9 Keowee Hydro Discharge 27.7 6.5-6.5 83.6 Station 605 27.8 6.5-6.5 83.9 1.3.1-23 ONS 12/76
!
l
Table 1.3.1-3 (Cont.) Page 4 of 6 b*eekly DO Monitoring Program Oconee Nuclear Station May-November, 1974 DATE STATION TEMP.0C DO mg/l DO % Sat. 8/19/76 Oconee Intake 22.9 4.2-4.2 49.3 Oconee Discharge 29.5 4.3-4.5 58.6 Keowee Hydro Intake 27.9 5.4-5.3 69.1 Keowee Hydro Discharge 28.2 7.1-6.8 90.4 Station 605 28.2 6.9-7.0 90.4-
.
8/26/76 Oconee Intake 24.2 4.7-4.5 55.4 Oconee Discharge 30.5 4.8-4.8 65.1 Keowee Hydro Intake 28.9 5.9-6.0 78.4 Keowee Hydro Discharge 26.9 7.4-7.0 91.2 Station 605 27.4 7.3-7.5 94.8 9/2/76 Oconee Intake 25.1 5.0-4.8 60.0 Oconee Discharge 31.7 5.1-5.0 69.5 Keovee Hydro Intake 29.6 6.0-5.8 78.8 Keowee Hydro Discharge 28.0 5.9-6.0 77.1 Station 605 28.3 5.9-6.0 77.5 9/9/76 Oconee Intake 24.9 5.0-5.0 61.0 Oconee Discharge 30.2 5.2-5.2 70.2 Keowee Hydro Intake 29.6 5.8-5.8 77.4 Keowee Hydro Discharge 28.5 7.5-7.2 96.1 Station 605 28.2 7.2-7.2 93.6 9/16/76 Oconee Intake 24.7 5.5-5.6 67.5 Oconee Discharge 30.1 5.6-5.7 76.1 Keowee Hydro Intake 29.0 6.2-6.2 81.8 Keowee Hydro Discharge 26.7 7.8-7.7- 97.8 Station 605 27.7 7.7-7.6 98.4 1.3.1-24 ONS 12/76
'
1-
Table 1.3.1-3 (Cont.) Page 5 of 6 Weekly DO Monitoring Program Oconee Nuclear Station May-November, 1976 DATE STATION TEMP,0C DO mg/l DO % Sat. 9/23/76 Oconee Intake 24.4 5.7-5.7 68.9 Oconee Discharge 28.1 6.0-5.9 77.2 Keowee Hydro Intake 27.0 6.4-6.4 81.3 Keowee Hydro Discharge 26.8 7.8-7.9 99.4 - Station 605 26.7 7.8-7.8 98.5 9/30/76 Oconee Intake 23.8 5.8-5.9 69.9 Oconee Discharge 30.3 5.8-5.8 78.4 Keowee Hydro Intake- 27.5 6.3-6.4 81.4 Keowee Hydro Discharge 25.9 7.7-7.6 95.1 Station 605 26.4 7.6-7.7 96.1 10/7/76 Oconee Intake 23.8 5.9-5.9 70.5 Oconee Discharge 28.5 5.9-5.9 77.1 Keowee Hydro Intake 26.7 6.5-6.6 82.7 Keowee Hydro Discharge 26.0 7.0-7.1 87.9 Station 605 26.2 7.4-7.8 95.1 10/14/76 Oconee Intake 22.9 6.0-6.1 71.0 Oconee Discharge 25.6 6.1-6.1 75.5 l Keowee Hydro Intake 25.6 6.6-6.7 82.3 I Keowee Hydro Discharge 24.1 7.9-8.2 96.8 Station 605 24.5 8.0-8.1 97.6 10/21/76 Oconee Intake 21.5 7.3-7.4 84.0 Oconee Discharge 26.7 6.9-6.9 87.1 Keowee Hydro Intake 24.0 7.0-7.0 84.0 Keowee Hydro Discharge 22.8 7.9-7.8 92.0 Station 605 22.9 7.8-8.0 92.7 1.3.1-25 ONS 12/76
Table 1.3.1-3 (Cont.) Page 6 of 6 Weekly DO Monitoring Program Oconee Nuclear Station May-November, 1976 DATE STATION TEMP."C DO mg/l DO % Sat. 10/28/76 Oconee Intake -19.9 7.7-7.7 85.2 Oconee Discharge 22.6 7.4-7.4 86.4 Keowee Hydro Intake 21.7 7.2-7.3 83.1 Keowee Hydro Discharge 21.3 7.3-7.3 83.0 Station 605 21.3 7.3-7.4 83.6 . 11/3/76 Oconee Intake 18.8 7.7-7.7 83.2 Oconee Discharge 20.7 7.6-7.6 85.4 Keowee Hydro Intake 20.4 7.5-7.6 84.4 > Keowee Hydro Discharge 19.9 7.7-7.8 85.7 Station 605 19.9 7.7-7.7 85.2 11/11/76 Oconee Intake 17.2 8.7-8.5 90.0 Oconee Discharge 19.6 7.9-8.0 87.4 Keowee Hydro Intake 18.7 8.5-8.3 90.6 Keowee Hydro Discharge 18.4 8.7-8.8 93.9 Station 605 18.5 9.1-9.1 97.8 11/18/76 Oconee Intake 15.8 8.5-8.5 86.2 Oconee Discharge 20.1 8.5-8,5 94.4 Keowee Hydro Intake 19.1 8.5-8.6 93.0 Keowee Hydro Discharge 16.9 9.0-9.6 96.0 Station 605 16.6 9.6-9.5 98.6 11/24/76 Oconee Intake 14.7 9.0-9.0 89.1 Oconee Discharge 18.7 8.7-8.7 93.8 Keowee Hydro Intake 18.4 8.9-9.0 96.0 Keowee Hydro Discharge 15.7 8.9-8.9 90.1 Station 605 16.3 9.0-9.3 93.8 1.3.1-26 ONS 12/76 i i
l ! L.
l Table 1.3.1-4.
SUMMARY
OF KE0 WEE TAILRACE TEMPERATURE Data: Amounts (average for month and maximum within month) by which temperatures recorded during generating mode exceeded those during non-generating mode of Keowee Hydro. (See text for further explanation). MONTH MEAN MAXIMUM (C*) (C*) - January +1.11 +2.8 February +0.95 +2.5 March +0.45 +2.8 April +0.91 +2.5 !
!
May I
+0.94 +2.2 l
!
l
.
June +2.29 +3.6 July +1.76 +3.6 August No Data No Data September +1.48 +2.2 October +1.26 +2.0 November +0.27 +1.4 December +0.47 +1.0
.
1.3.1-27 ONS 12/76
._. -
. _ _ _
STATION 601 W.LARY HeauAhr MAh ~et APast uny
., Juht AsLY August q(
n ., ., SEPTE Mai n OCTOel R NOVE D.E R
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nMPERATURE (C) im k Figure 1.3.1-1. Temperature isopleth for Location 501.0 on Lake Keowee for 1976. 5 i
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.
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.
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.
40 - - - - - - - - 5 10 3 20 25 30 35 40 45 WATER TEMPERATURE (*C) Figure 1.3.1-23. Lake Keowee Mean Monthly Water Temperature Profile for Station 502 for September, 1976. 1.3.1-50 ONS 12/76
1.3.2 FISH - POPULATION DYNAMICS AND REPRODUCTION Specification: A. Comparisons shall be made of the data obtained by systematic sampling of fishes using nets, electro-fishing and rotenone at ruitable locations both within and essentially out of the influence of the affluent. Significant changes in the composition, abundance, and growth of the major fishes in various areas of Lake Keowee shall be identified and the factors which cause change defined especially those relating to the affluent from Oconee Nuclear Station (Duke Power Company,1973a). I. TNTR0bUCTION ' A discussion of the effects of power plant operation on the population dynamics of fishes was presented in the Oconee Nuclear Station Semi-Annual Report for the period ending June 30, 1973 (Duke Power Company, 1973b). Those studies are being performed by the Southeast Reservoir Investigations (SER'), Fish and Wildlife Service, located in Clemson, South Carolina. II. METHODS AND MATERIALS Methods and materials used for fisheries research in connection with the operation of ONS have been summarized in the ONS Semi-Annual Report for the period ending June 30, 1974 (Duke Power Company, 1974). This program has continued through December 31, 1976, except for the dis-continuation of electrofishing after October 1975. This decision was made because of low numbers of fish collected with this technique. Electrofishing is now used only to collect fish for life history work or for special experiments. III. RESULTS AND DISCUSSION Data necessary to characterize the dynamics of fish populations of Lake Keowee have been collected using seines, gill nets, and rotenone. A discussion of these data is provided in SERI Reports for fiscal years 1975 and 1976 (Appendices C and D). Species composition and relative abundance have been analyzed. Seining data, collected at 20 stations, have indicated an apparent reduction in shoreline fish populations since sampling was initiated. This general trend has also been indicated by gill net and rotenone data. These data suggest that some species select cool water outside the areas sampled with rotenone and are subsequently collected by gill netting. Overall, rotenone and gill net sampling have not shown major changes in community structure or standing stock of the La!e Keowee fishery. Gill I net data indicate an increase in abundance of flat bullhead, largemouth ! bass, and black crappie from 1972 through 1976. Seven other major l 1.3.2-1
_ - . species have declined in abundance over the same period. The drop in the number of species present in Keowee is due, at least in part, to the alteration of the original riverine habitat. Age and growth estimates based on scale samples indicate that bluegill and yellow perch growth have been unchanged since 1972. Growth of black crappie and largemouth bass has increased between 1973 and 1974. Factors af fecting growth rates of these major species have not yet been specifically described. IV. SUMHARY AND CONCLUSIONS
-
The studies conducted by SERI have provided some valuable data concerning species composition, abundance, and growth of Lake Keowee fishes. These data do not reveal any apparently significant changes in the characteristics of the adult fish community.
.
LITERATURE CITED Duke Power Company. ,1973a. Appendix B to Facility Operating License Nos. DPR-38, DPR-47, and DPR-55, Technical Specifications for the Oconee Nuclear Station Units 1, 2, and 3, Duke Power Company. U. S. Atomic Energy Commission, Docket Nos. 50-269, 50-270, and 50-287 (revised August 1, 1975, NRC), Washington, D. C.
. 1973b. Oconee Nuclear Station. Semi-Annual Report, Period Ending June 30, 1973.
. 1974. Oconee Nuclear Station. Semi-Annual Report, Period Ending June 30, 1974.
l l t i 1.3.2-2 _ _ _
,. .
._
l.3.2 FISH - POPULATION DYNAMICS AND REPRODUCTION _ Specification: B. The reproduction of four (4) indicator species (large-nouth bass, black crappie, yellow perch, and bluegill) representative of the fish species in Lake Keowee shall be characterized by determining the environmental require-ments for reproduction. Pertinent data collected from other studies shall be utilized and results and obser-vations obtained for Lake Keowee shall be compared to those previously published. Spawning data for Lake Keowee shall be collected by - direct observation and the use of ichthyoplankton trawls. The sampling procedures, periods, and intensity related to Specifications A and B above will be based on those established by the Southeast Reservoir Investigations team of the Fish and Wildlife Service, Department of the Interior (Duke Power Company, 1973a). I. INTRODUCTION A discussion of the effects of power plant operation on the population dynamics of fishes was presented in the Oconee Nucle ; Station Semi-Annual Report for the period ending June 30, 1973 (Duke Power Company, 1973b). I II. METHODS AND MATERIALS The methods and materials used in studying the reproduction of Lake Keowee fishes have been previously described (Duke Power Company, 1974). This program has continued without change through December 31, 1976. III. RESULTS AND DISCUSSION Life history studies have continued on four indicator <.pecies representa-tive of the species in Lake Keowee (Appendices C and D). These are: largemouth bass, black crappie, bluegill, and yellow perch. Life history studies have been divided into three distinct parameters for each species. These are: (1) age and growth,- (2) reproduction and fecundity, and (3) food habits. Three study areas on Lake Keowee have been selected as sampling locations for life history data. These areas are: (1) pump back, (2) ONS discharge, and (3) a control located near Watergate Marina. Trawl sampling, conducted March - September 1971 through 1976, has resulted in a steadily declining catch of yellow perch, black crappie, and sunfishes during the study period. If these data represent an actual drop in abundance, competition from recently introduced threadfin shad may be an influencing factor. It is possible, however, that these data may indicate less efficient sampling as a result of changes in larval fish distribution af ter the operation of Oconee Nuclear Station.
.
1.3.2-3
Gonads have been collected and preserved from specimens since the 1973 field season began. Fecundity of females for some species has been determined (Appendix D). . Fecundity data are still.being analyzed. Comparisons will be made between pre-operational and operational periods. IV.
SUMMARY
AND CONCLUSIONS Data on the reproduction of largemouth bass, black crappie, yellcw perch, and bluegill have been collected using trawls, seines and by direct obse rvatiori. These data indicate a decrease in mean number of larval - fish per standard frame trawl haul at all stations from 1973 through 1976 (Appendix C). Adequate data are not yet available for an assessment of the effects of ONS on the reproduction of Lake Keowee fishes. LITERATURE CITED Duke Power Company. 1973a. Appendix B to Facility Operating License Nos. DPR-38, DPR-47, and DPR-55, Technical Specifications for the Oconee Nuclear Station Units 1, 2, and 3 Duke Power Company. U. S. Atomic Energy Commission, Docket Nos. 50-269, 50-270, and 50-287 (revised August 1, 1975, NRC), Washington, D. C.
. 1973b. Oconee Nuclear Station. Semi-Annual Report, Period Ending June 30, 1973.
. 1974. Oconee Nuclear Station. Semi-Annual Report, Period Ending June 30, 1974.
.
e 6 1.3.2-4
__ ___ l.3.3 PERIPHYTON Specification: Duplicate artificial substrates (plexiglass slides) shall be held in racks and submerged at a depth of five feet at three general locations in the lake (Stations 502, 504, and a station in the discharge area) that may be influenced by the plant discharge, and at two control locations in the lake (Stations 501 and 506) that shall be essentially out of the influence of the plant discharge. Dry and ash-free weights of each sample shall be determined so that compari-sons can be made of the relative productivity values between i
-
the different stations (Duke Power Company,1973a). I. INTRODUCTION A general discussion of the concepts involved in this study has been presented (Duke Power Company,1973b). II. METHODS AND MATERIALS Previously described methods and materials (Duke Power Company, 1973a, 1973b, 1975a, 1975b) were followed during this report period except for the following changes: 1 Beginning with the February 1976 sampling period, 2 replicates at each station, instead of one, were analyzed for species composition and density. l Beginning with the June 1976 sampling period, slides collected for species composition and density were preserved in the field and placed in separate plastic containers to prevent dessication and minimize distortion of algal cells. Density counts were made under a magnification of 500X and diatom proportional counts under oil immersion at 1250X. III. RESULTS AND DISCUSSION Organic Accumulation Periphyton production data for 1976 are presented in Table 1.3 3-1 2 The highest rate of organic accumulation for the year was 155.3 mg/m / day at station 506 in June and the lowest rate was 1.1 mg/m2 / day at Station 500 in January. Maximum rates for all stations occurred during summer (June, July and August), while minimum values occurred during late fall and winter (November, December and January) (Figure 1.3.3-1). Station 506 showed the maximum yearly mean while the minimum yearly mean was observed at Station 502.
'
The maximum yearly rate of organic accumulation during 1973 and 1975 1.3.3-1 ONS 12/76 I
occurr ed at Station 508, while the maximum yearly rate during 1974 occurred at Station 500 (Duke Power Company 1973a,1973b,1975a,1975b). A com-parf aon of organic accumulation rates in 1976 with those in 1975 showed an overall increase at Stations 500, 501 and 506 and an overall decrease in accumulation rates at Stations 502, 504 and 508 (Duke Power Company, 19 5) . Sida crystallina 0. F. Muller, a benthic cladoceran, was occasion-a14y found in abundance at Stations 500, 501 and 506 during the warmer months of 1976. Thf.s organism was seldom observed at Stations 502, 504 and 508. Its presence would account for an undetermined increase in total organic accumulation rates at these stations. Total Periphyt'on Community - A total of 221 algal taxa were observed during 1976, (Table 1.3.3-3), including 156 diatoms (Bacillariophyceae), 3 chrysophytes (Chrysophyceae), 37 greens (Chlorophyceae), 6 cryptophytes (Cryptophyceae),12 blue-greens (Myxophyceae), 1 euglenoid (Eugelncphyceae) and 6 dinoflagellates (Dinophyceae). One hundred and twenty-one new taxa were identified of which 70 were l diatoms. The large number of new taxa was probably due to more intense observation and improved sampling techniques rather than an actual increase in the diversity of periphytic algae in Lake Keowee. l Periphyton population densities and diatom proportional count data are presented in Appendix B, Section 1. Total periphyton densities are pre-sented in Table 1.3.3-2 and Figure 1.3.3-2. The highest density of total periphyton occurred at Station 508 during August (639,866 cells /cm2 ) while the lowest density was observed at Station 500 in January (2210 cells /cm2 ), , The lowest density corresponded to the lowest organic accumulation rate for the year and also the minimum recorded temperature (9.6 C; Section 1.3.1). Densities were generally low during the winter months, periods of < low temperatures and low light intensities, and increased as the lake became warmer. Diatoms continued to deninate the periphyton assemblages in Lake Keowee . during 1976, comprising over 60% of the total number of individuals at all locations except Station 508 in August and September. At Station 508 during these months, as in 1975, green algae, predominantly Mougeotia spp. comprised over 50% of the periphyton community. Both diatoms and green algae reached their highest observed densities at Station 508 in August (307,013 cells /cm2 and 321,369 cells /cm2 , respectively) (Figure 1. 3. 3-2) . This was probably due to an increase in nutrients (ammonia) at that time . I and not an effect of temperature in the ONS discharge area since temp-eratures in August at all stations varied less than 1 C. Mougeotia spp. also contributed over 30% to the periphyton assemblages at Stations 500 and 501 during September. Diogenes sp. (Nannochloris sp.), another green i ' alga, was found to comprise over 20% of the total densities at Stations 501 and 502 in June and 506 in August. Blue green algae are of interest in studies on thermal discharges since many species are tolerant of high temperatures. Blue greens were usually an unimportant part of the periphytic algal community and con-tributed less than 10% of the tctal density at all months except April l where they made up 13% of the deasity at Stations 501 and 506. Tempera tures l t 1.3.3-2 ONS 12/76 l
.-.
in the vicinity of the ONS discharge (maximum 29.5 C at Station 508 in September) were never high enough to cause a shift from diatoms and greens to blue green algae. Blue green algae typically become dominant et temperatures above 35 C (Patrick et al. 1969) and are often the sole algal component at temperatures above 40 C (Brock,1974). Lower pH conditions found in the discharge area during the stratified period also tend to favor production of green algae over blue greens by making more free CO2 available (Shapiro,1973). Green algae are generally considered more desirable than blue greens as they are within the food chain and do not form floating scums (Shapiro,1973). Epipyxis ramosa, an epiphytic colonial chrysophyte, was observed for the . first time at Station 504 in June when it comprised 22% of the total density (6426 cells /cm2 ). This taxon was common, although numerically less important throughout the summer. The appearance of this taxon may be due to improved preservation techniques instituted in June. None of the other classes of algae (cryptophytes, euglenoids, or dino-flagellates) ever contributed more than 2% to the total periphyton - density at any time. Diatom Community Structure Achnanthes microcephal'a dominated the periphytic diatom assemblages with a mean relative abundance for the year of approximately 61%. This taxon was especially important at Stations 500 and 501 from May through August, where it comprised over 80% of the diatom assemblages. Cholnoky (1968) characterizes this taxon as "the best indicator of permanent oxygen concentration in weakly acidic waters." This statement may be supported in Lake Keowee by its lowest percentages generally occurring in the ONS discharge which has the lowest dissolved oxygen concentrations (Section 1.3.1). Members of the genus Tabe11 aria (r. fenestrata and T. flocculosa) were of major importance from February through May at Station 508 and in March at Station 500. This is a colonial diatom of ten found attached to a variety of substrates (Patrick and Reimer,1966). Eunotia spp. (primarily E. naegelii) were observed in substantial numbers only at stations affected by the ONS discharge (Stations 508 and 504) from July through September. T. fenestrata, T. flocculosa and E. naegelii are all considered . acidophilous (Lowe,1974; Patrick and Reimer,1966). Several members of the genus Synedra (all varieties of S. rumpens and an unidentified species) comprised a large portion of the diatom community from November through February at all stations and reached a maximum relative abundance of 52% at Station 508 in December. These taxa are present under a wide temperature range and are " indifferent" to pH (Lowe, 1974). The relative abundance of Anomodheis vitrea ranged from less than 5% during all months at Station 500 to 33.7% at Station 504 in September. 1.3.3-3 ONS 12/76
.
It was especially prominent in the fall at all locations except Station 500. This species is found under a wide range of ecological conditions (Patrick and Reimer,1966) and its occurrence could not be related to the operation of ONS. The periphytic abundance of Cyclotella ste111gera increased during those times of year when it is most abundant in the phytoplankton (Section 1.3.4). C. ste111gera, a small centric diatom, is typically planktonic (Hutchinson, 1967) and probably settles onto exposed sub-strates. Another centric diatom, Melosira distans, was common throughout the year. This species was especially important at Stations 504 and 506 in February and Station 501 in March. Although frequently found among the - phytoplankton, this diatom is typically periphytic and is described by Lowe (1974) as being acidophilous and inhabiting both polluted and unpolluted waters. IV.
SUMMARY
AND CONCLUSIONS Yearly lows for both organic accumulation and total periphyton densities occurred in January at Station 500. Maximum rates of organic accumulation occurred at Station 506 in June and maximum periphyton density occurred at Station 508 in August. The presence of microinvertebrates on periphyton slides may have influenced the organic accumulation values obtained at Stations 500, 501 and 506. The trend of maximum organic accumulation rates during summer months, and minimum rates during winter months was observed for 1976 as in previous years. A total of 121 new taxa, including 70 new diatom taxa were recorded during 1976. This was attributed to more intense observation of periphyton samples and improved sampling methods rather than an increase in the diversity of Lake Keowee periphyton. Diatoms contributed more than 60% of the periphytic algal community during all months except August and September at Station 508 when green algae, predominantly Mougeotia spp., were most abundant. These same general trends were observed during 1975 (Duke Power,1975). The increased abundance ' of total periphyton at Station 508 in August was considered to be due to a higher concentration of nutrients (ammonia). Temperature and light were of primary importance in influencing the seasonal abundance of periphyton in Lake Keowee as a whole. Ecwever, no effect of temperature due solely to the operation of ONS was observed. Slightly more acidic conditions st Stations 508 and 504 brought about by the operation of ONS during the stratified period caused a shift in diatom species composition towards more acidophilous forms (esp. Eunotia spp.). Blue green algae were not observed to be enhanced by the operation of ONS. As compared with previous years, no net increase or decrease in the pro-ductivity of Lake Keowee periphyton was found. 1.3.3-4 ONS 12/76
LITERATURE CITED Brock T. D. and J. Hoffman. 1974. Temperature optimum of algae living in the outfall of a power plant on Lake Monona. Wis. Acad, of Sci. Art and Let. Vol. 62. p. 195-203. Cholnoky, B. J. 1968. The ecology of diatoms in inland water. J. Cramer. Lehre. 699 pp. Duke Power Company. 1973a. Appendix B to Facility Operating License Nos. DRP-38, DPR-47 and DPR-55. Technical Specifications for the Oconee Nuclear Station Units 1, 2 and 3, Duke Power Company. U. S. Atomic . Energy Commission, Docket Nos. 50-269, 50-270 and 50-287 (Revised August 1, 1975, NRC), Washington, D. C.
. 1973b. Oconee Nuclear Station Semi-Annual Report, Period Ending June 30, 1973.
. 1975a. Oconee Nuclear Station Semi-Annual Report, Period Ending June 30, 1975.
. 1975b. Oconee Nuclear Station Semi-Annual Report, Period Ending December 31, 1975.
Hutchinson, G. 1967. A Treatise on Limnology, Vol. II. J. Wiley and Sons, Inc. N. Y. 1115 pp. Lowe, R. L. 1974. Environmental requirements and pollution toicrance of freshwater diatoms. U.S.E.P.A. Cincinnati. 334 pp. Patrick, R., B. Crum, and J. Coles. 1969. Temperature and manganese as determining factors in the presence of diatom or blue-green algal floras in streams. Proc. Nat. Acad. Sci. 64, 472-478.
. and C. W. Reimer. 1966. The diatoms of the United States: Vol. I.
Monogr. No. 13 Acad. Nat. Sci., Philadelphia. 688 pp. Shapiro, J. 1973. Blue-green algae: Why they become dominant. Science, Vol. 179, pp. 382-384, 1.3.3-5 ONS 12/76
Table 1.3.3-1 Periphyton Organic Accumulation Racec in mg/m2/ day From December 31, 1975 through December 30, 1976 For Stations in Lake Keowee, S. C. (Values are Averages of Duplicate Samples). Exposure Period Sampling Stations Ending Date No. Days 500 501 502 508 504 506 - 1-31-76 31 1.1 3.9 2.3 5.2 5.7 ** 3-1-76 30 9.9 4.7 5.1 4.4 5.5 8.0 3-31-76 30 2.9 5.9 4.8 2.6 6.4 61.0 5-3-76 . 32 17.6 12.4 4.4 29.3 22.5 132.5 6-1-76 30 59.4 20.9 9.5 20.2 29.3 7.8' 6-29-76 29 9.1 78.5 18.8 21.8 68.8 155.3 7-28-76' 29 141.2 105.1 10.8 84.8 39.3 140.2 8-30-76 33 58.2 76.1 57.8 91.9
- 89.8 9-29-76 30 137.9 70.6 35.2 29.2 67.5 147.0 10-29-76 30 77.8 12.4 12.6
- 27.9 108.5 11-30-76 32t 14.1 2.0 2.1 3.6 4.7 9.9
#
12-30-76 30 5.2 2.3 3.1 4.0
- 8.0 Yearly Mean 44.5 32.9 13.9 27.0 27.8 78.9
.
- Sampler Missing
** Sample lost due to lab accident t Station 508 this date = 27 days 1.3.3 ONS 12/76 ,
___ Table 1.3.3-2 Total Periphyton Densities in Number of Cells per cm 2 From December 31, 1975 through December 30, 1976 for Stations in Lake Keowee, S. C. (Values are Averages of Duplicate Samples). Exposure Period Sampling Stations Ending Date 500 I 501 502 508 504 506 - 1-31-76 2,210 7,736 11,743 115,948 29,840 12,434 3-1-76 2,646 3,636 10,051 26,495 14,005 23,931 3-31-76 17,514 19,059 16,045 36,465 46,260 62,501 5-3-76 107,131 3,869 22,379 86,994 157,523 106,650 6-1-76 79,126 26,576 25,635 165,941 13,712 17,708 6-29-76 68,497 54,962 103,296 53,731 28,848 46,984 7-28-76 54,379 67,744 77,384 233,458 61,569 136,177 8-30-76 134,744 154,636 146,021 639,866
- 125,613 9-29-76 344,338 175,347 49,733 136,462 107,463 165,091 10-29-76 136,275 26,729 65,761
- 106,235 258,894 11-30-76 50,244 9,383 7,622 20,610 27,413 41,971 12-30-76 9,411 2,936 2,449 7,641
- 13,500
- Sampler Missing
.
l I i l 1 I 1.3.3-7 ONS 12/76 .
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'..._.__..
. _ _ . - _ - _ _ _ . _ _ _ _ _ _ _ _ _ _ . - - _ _ _ - _ - - - _ - - - _ - - . _ _ .
.
.
Table 1.3.3- 3 Periphyton Species List for Lake Keowee through DecentAr, 1976 Division: Chrysophyta Class: Bacillariophyceae
*Achnanthes deflexa Reim. .
*A. exigua Grun.
* *A. cf . hauckiana Grun.
*I. lanceolata (Breb.) Grun.
*A. lanceolata var. dubia Grun.
**A. lewisiana Patr.
*I. linearis "(W. Sm.) Grun.
*A. linearis f. curta H. L. Smith
* *I. marginulata Grun. -
* *A,. microcephala (Kutz.) Grun.
* *A. minutissima Kutz.
A. saxonica Krasske
*Imphora ovalis Kutz.
* *Anomoeneis exilis (Kutz.) Cl.
*A. serians (Breb. ex Iatz.) Cl.
*A. serians var. brachysira (Breb. ex Kutz.) Hust.
*A. vitrea (Grun.) Ross
*Asterionella formosa Hass.
* *Calone's '~SIillum (Grun.) Meres.
*
- C,. sy
*Cocc. .a placentula Ehr.
* *C. placentula var lineata (Zhr.) V. H.
*Cyclotella meneghiniana Kutz.
* *C. pseudostelligera Hust.
*C. stelligera C1. and Grun.
* *Cymbella cf. cesatii (Rabh.) Grun, ex A. S.
*C. gracilis (Rabh.) Cleve
*[.hybrida e run.
*C. microcephala Grun.
*C. naviculiformis Auerswald
*C. tumida (Breb.) Van Heurck
- C.. turgida (Greg.) Cleve
*C. ventricosa Kutz.
*Denticula elegans Kutz.
*
- D[. s p .
**Diatoma vulgare Bory
*Diploneis ellipica (Kutz.) C1.
*
- D. sp .
-
l
- Observed during the sampling period of January through December 1976.
! ** Observed for the first time during the above sampling period. l l < 1.3.3-10 ONS 12/76
,
Table 1.3.3-3 (Cont.) Page 2 of 6 Epithemia cebra (Ehr.) Kutz.
** Eunotia arcus var bidens Grun.
- E. curvata (Kutz.) Lagerst
*
- 5. curvata var. capitata (Grun.) Patr. comb. nov.
- 5. exigua (Breb. ex Kutz.) Rabh.
- 5. fallax A. C1. -
- 5. flexuosa Breb ex Kutz.
- 5. flexuosa var. eurycephala Grun.
E. incisa W. Sm. ex Greg.
*
- E. cf. incisa W. Sm. ex Greg.
- 5. naegelii Migula
- 5. pectinalis (O. F. Mull.?) Rabh
*
- 5. pectinalis var. minor (Kutz.) Ru ...
E. pectinalis var. ventricosa Grun.
- 5. perpusilla Grun.
E. zasuminensis (Cabejszekovna) Korner
- 5. sp .
- Fragilaria construens var. venter (Ehr.) Grun.
- F. crotonensis Kitton
** 5. pinnata Ehr.
- F. vaucheriae (Kutz.) Peters
**F. sp.
- Erustulia r. omboides (Ehr.) DeT.
- F. rhomboi20 var. amphipleuroides (Ehr.) DeT.
- 5. rhomboides var. ,capitata (A. Meyer) Patr.
F. rhomboides var. crassinervia (Breb. ex W. Sm.) Ross
- 5. rhomboides var. saxonica' (Rabh.) DeT.
- Gomphonema cf. abbreviatum (Ag) Kutz.
- G. cf. acuminatum Ehr.
- 5. acuminatum var. coronata W. Smith G. acuminatum var. turris Cleve
- 5. angustatum (Kutz.) Rabh.
- 5. angustatum var. producta Grun.
- 5. cf. apuncto J. Wallace
- 5. constrictum Ehr.
- 5. constrictum var. capitata (Ehr.) Cleve
- 5. p acile Ehr.
- G_. intricatum Kutz.
C. 1.anceolatum Ehr.
- G. larvulum (Kutz.) Grun.
G_. puiggarianum Grun.
- G. sp.
- h rosigma spencerii (W. Smith) Grif. and Henf.
Eantzschia amphioxys (Ehr.) Grun. 1.3.'3-11 ONS 12/76
- - Table 1.3.3-3 (Cont.) Page 3 of 6
*Melosira distans (Ehr.) Kutz.
*M. granulata (Ehr.) Ralfs
- M_ . granulata var. angustissima (Ehr.) Mull.
**M. italica (Ehr.) Kutz.
*
- M_.
_ italica var, tenuissima (Grun.) O. Mull.
*M. varians Ag. ,
M. sp.
**Meridion circulare (Grev.) Ag.
** Navicula accomoda Hust.
*sN. cf. accomoda Hust.
**N. cf. anglica Ralfs
'r*N_.
capitata var. htngarica_ (Grun.) Ross N. cocconeiformis (Grun.) Ross
**N. cryptocephala Kutz.
**N. contenta Grun.
@.decussis $str.
*N. exigua var. capitata Patr.
*
- 9,. gregaria Donk.
*1!. halophila (Grt'n . )
,
C1.
- 5. hambergii Hust.
*N. hustedtii Krasskt.
**N. lanceolata (Ag.) Ac*z.
*5. lateropunctata Wallace
**5. lapidosa Krasske
*N. minima Grun.
**N,. mutica Kutz.
*N_.
mutica var tropica Hust.
*N. notha Wallace
*N_.
paucivisitata Patr.
*N_. pupula Kutz.
*N_.
pupula var. capitata Sky. and Meyer N_. pupula var. elliptica Hust.
**N. pupula var. mutata (Krasske) Hust.
**N. radiosa var. parva Wallace
**5. rhynchocephala Kutz.
**N. rhynchocephala var. germainii (Wallace) Patr.
**N. schroeteri var. escambia Patr.
**N. cf. secura Patr.
*N. subtillissima Cleve
**N_. viridula (Kutz.) Kutz.
*N_. viridula var. linearis Hust.
viridula var, rostellata (Kutz.) C1.
**N_.
**N. sp.
1.3.3-12 ONS 12/76 [O
.
.
Table 1.3.3-3 (Cont.) Page 4 of 6 cf. Neidium affine var. humerus Reim.
**N. affine var. longiceps (Greg.) C1.
N. iridis var. amphigomphus (Ehr.) A. Mayer N, sp.
*Nitzschia acicularis W. Smith N. amphioxoides Hust. -
N. denticula Grun.
**N. dissipata (Kutz.) Grun.
**N. filiformis (W. Smith) Schutt
**N. frustulum (Kutz.) Grun.
*N. lorenziana var. subtilis Grun.
,N. obtusa W. Smith
*N. palea (Kutz.) W. Smith
,
**t.,J paleacea Grun.
*N. sigmoidea (Nitzsch) W. Smith
*N. sp.
**Pinnularia biceps Greg.
P. biceps f. petercenii Ross
**P. cf. borealis Ehr.
**P. braunii (Grun.) C1.
*F. braunii var. amphicephala (A. Mayer) Hust.
**P;. cf. divergens W. Smith
*P,. mesolepta (Ehr.) W. Smith P,. microstauron (Ehr.) C1.
**P;. subcapitata Greg.
P;. subcapitata var. paucistriata (Grun.) Cl.
*P,. sp.
, ' *Stauroneis amphioxys Greg. S. anceps Ehr.
*SL. anceps f. gracilis Rabh.
*S[. livingstonii Reim.
j,. phoenicenteron (Nitz.) Ehr.
*j,. phoenicenteron f. gracilis (Ehr.) Hust.
E.. sp.
**Stephanodiscus sp.
**Surirella angustata Kutz.
S. delicatissima Lewis
*],. linearis W. Smith S[. linearis var. helvetica (Brun.) Meister
**j,. ovata Kutz.
*S. sp.
**Synedra acus Kutz.
**SL. amphicephala Kutz.
*!,. famelica Kutz.
**],. cf. miniscula Grun.
*S,. parasitica (W. Sm.) Hust.
.
1.3.3-13 ONS 12/76
.
l Table 1.3.3-3 (Cont.) Page 5 of 6
** S. cf. parasitica (W. Sm.) Hust.
*[. radians Kutz.
*S. rumpens Kutz.
*S. rumpens var. familiaris (Kutz.) Hust.
**S. rumpens var, fragilariodes Grun.
*S. rumpens var meneghiniana Grun. .
*S. rumpens var. scotica Grun.
*S. socia Wallace
*S. ulna (Nitz.) Ehr.
"S. sp.
*Tabellaria fenestrata (Lyngb.) Kutz.
*T. flocculosa (Roth) Kutz.
Class: Chrysophyceae
**Dinobryon bavaricum Imhof
**Epipyxis ramosa (Lauterb.) Hilliard and Asmund
** Unidentified chrysophyte cyst Division: Chlorophyta Class: Chlorophyceae
*Ankistrodesmus falcatus (Corda \ Ralfs A. sp.
**Characium ambiguum Hermann
**C. sp.
- Chlamydomonas sp.
**Cosmarium angulosum var. concinnum (Rab.) 9. and G. S. West
*C, asphaerosporum var. strigosum Norst.
**C, cosmetum Norst.
**[.trilobatumvar,depressum Printz
*C. sp.
**Crucigenia sp.
- Diogenes sp.
**Monoraphidium contortum Thur.
**M. setiforme (Nygaard) Komarkov-Legnerova
*M. sp.
*Mougeotia sp. A
*M. sp. B
*0edogonium sp.
**Pediastrum duplex var. gracilimum West and West
*Pseudenoclonium basiliensis Vischer
**Scenedesmus abundans (Kirch.) Chod.
*S,. acuminatus (Lag.) 'Chod.
'
**S. armatus (Chod.) G. M. Smith
**l.cf.bijuga (Turp.) Lag.
**S. dimorphus (Turp.) Kutz.
**S. quadricauda (Turp.) Breb.
**S. sp.
1.3.3-14 ONS 12/76 .
.
.
__ _ _ _. __ s Table 1.3.3-3 (Cont.) Page 6 of 6
**Selenastrum minutum (Naeg.) Collins
**Spyrogyra sp.
**Staurastrum curvatum var. elongatum C. M. Smith
**S. dejectum Breb.
*S_. tetracercum Ralfs S.. sp.
**Tetraedron caudatum (Lorda) Hansgirg -
T_. enorme (Ralfs) Hansgirg
*
- T_. cf. limneticum Borge
**],'. minimum Braun
**]'.,
muticum (A. Braun) Hansgirg
** Coccoid greens
** Unidentified green flagellates Division: Cryptophyta Class: Cryptophyceae
**Cryptomonas ovata Ehr.
** C. phaseolus Skuja
** C. sp.
** Rhodomonas minuta Skuja
**cf. Rhodomonas minuta Skuja
** Unidentified flagellate Division: Cyanophyta Class: Myxophyceae
** Agmenellum quadriduplicatum (Menegh.) Breb.
- Anabaena sp. ,
** cf. Anabaena sp.
** Anacystis cyanea Drouet and Daily j
**A. incerta Drouet and Daily
;
, **A. thermale Drouet and Daily ,
** A. sp . ,
'
*0scillatoria geminata Menegh. '
*
- 0. sp.
** Phormidium angustissima West and West
_
*
- P,. sp .
** Unidentified blue green filament Division: Euglenopnyta Class: Euglenophyceae
** Euglena sp.
Division: Pyrrhophyta Class: Dinophyceae
** Glenodinium sp.
** Peridinium inconspicuum Lemm.
** P,. pusillun (Pen.) Lemm.
** P,. wisconsinense Eddy
*
- P,. s p . l
** Unidentified Dinoflagellate '
1.3.3-15 ONS 12/76
--
1.3.4 PHYTOPLANKTON-ZOOPLANKTON RECEIVING WATER STUDY Specification: Bimonthly sampling (6 times /yr.) shall be done at Stations 500, 503, 505, 506, 509.5 (intake structure), 508 (discharge cove), and 508.5 (approximately midway between 508 and 504). The latter two stations shall be geographically fixed points used for cooling water effects. Both whole water samples and samples concentrated using a plankton net will be collected. The sampling at stations affected by the discharge shall consist of samples taken at'sater depths, both affected and not affected by the plume. , At the control stations, samples will also be taken at these. cor responding depths (Duke Power Company,1973a). I. INTRODUCTION i A discussion of the importance of temperature regimes to phytoplankton and zooplankton has been tresented (Duke Power Company 1973b). II. METHODS AND MATERIALS " Previously described methods and materials were used in 1976 (Duke Power Company 1973b,1973c,1974a,1974b,1975a.1975b) except for the following amendments: Phytoplankton Sampling Lake Keowee phytoplankton were collected at nine stations on six
" occasions in 1976. Species composition, density, blovolume, and total chlorophyll determinations were made. Euphotic zone and secchi disc depths were also determined. Station 501.0 was added to the bimonthly frequency of staa. ding crop sampling. This station is deeper and more distant frcoi the Cane Creek watershed than Station 500.0. It also will serve ra an additional thermal control station, being located approxima*.ely 11 km from the ONS discharge cove. Duplicate algal density and biovolume results were reported as means for ' January only. Density and biovolume units have been changed from a per milliliter (prior to 1976) to a per cubic meter basis for consistency with chlorophyll units (mg/m 3). True chlorophyll and pheopigment data were not reported during this period because of instrument detection inadequacies. Duplicate total chlorophyll measurements were continued in 1976.
!
A one-way analysis of variance between stations (Sokal and.Rohlf 1969) was performed using density, biovolumes, and chlorophyll data for 1976. l l
'l.3.4-1 ONS 12/76
_ _ _
Duncan's mulsiple range test (Duncan 1955) was used for segregating significant station differences. Zooplankton Sampling Duplicate bottom to surface sampling was adopted at all designated zooplankton sampling stations in April 1976. Discrete depth sampling was discontinued due to inconclusive data obtained with the Schindler-Patalas plankton trap. Zooplankton Data Analysis . Standing crop (no/1) from 10 m to surface among sampling stations (500, 501, 502, 509.5, 503, 508, 508.5, 504, 505, 506) were compared statistical-ly as follows: 1) Data were tested for homogeneity of variances using Bartlett's Test (Sokal and Rohlf 1969) and for normality using the Kolmogorov-Smirnov Test (L1111efors 1967). 2) One-way analyses of variance (ANOVA) were performed on log 10 transformed data. 3) Duncan's New Multiple-Range Tests (Steele and Torrie 1960) were performed on data groups that yielded significant ANOVA results. All statistical tests were performed with a = 0.05. III. RESULTS AND DISCUSSION Phytoplankton Standing Crop i , Table 1.3.4-1 shows the depths of one percent light penetration (euphotic zone) and secchi disc visibility. Generally, the greatest measured depth of light penetration in Lake Keowee occurred during May (mean euphotic zone = 8.0 m, mean secchi disc = 3.6 m). November measurements of light penetration were the lowest of any date sampled (euphotic zone = 4.7 m, secchiSiisc = 2.3 m). The euphotic zone composite (EZC) samples typically possessed greater densities than lower sample depths (LSD) in 1976 (Table 1.3.4-2). Average Lake Keowee phytoplankton biovolumes were also greater for EZC than for LSD samples (Tabla 1.3.4-3). Generally, the chlorophyll concentrations were found to be higher in the EZC than in the LSD (Table 1.3.4-4) with the maximum differences for all three measurements occurring in the summer months. EZC densities for plume stations (grouped as 502.0, 503.0, 505.0, and 508.5) averaged 46% lower than lake control stations (grouped as 500.0, 501.0, and 506.0) densities (Table 1.3.4-2). Average densities in 1976 at the intake station (509.5) were considerably lower than lake control EZC densities, but only slightly lower than plume station densities. The average phytoplankton density for station 502.0 LLD samples was similar to the average intake and discharge density in 1976. Greatest densities occurred for the following stations during these months: 1.3.4-2 ONS 12/76
(1) lake control stations EZC in September; (2) plume stations EZC in July, and; (3) both the intake and the discharge in November. Yearly mean total biovolume for plume stations was 33% lower than the lake control EZC biovolume (Table 1.3.4-3). Intake and discharge bio-volumes averaged 43% and 56%, respectively, lower than biovolumes at the plume ctations in 1976. Station 502.0 LSD sample biovolume was similar to the average intake and discharge biovolumes. Greatest algal biovolumes were observed for these stations during the following months: (1) both lake control and plume EZC stations in July; (2) intake station in November, and; (3) discharge station in January. Receiving water peaka in algal biovolume during July coincided with slightly basic pH levels in the surface waters of the Little River arm of the reservoir ' (Water Quality, Section 1.3.1). EZC chlorophyll samples from the plume stations possessed 28% less chlorophyll than the lake control EZC samples (Table 1.3.4-4). Of all the stations, chlorophyll was typically the lowest at the intake and the discharge. The average chlorophyll in 502.0 LSD samples was similar to the levels in both the intake and the discharge samples during 1976. Maximum chlorophylls occurred at: (1) lake control stations and intake station in September; (2) plume stations in July, and; (3) discharge station in May. January and March densities, biovolumes, and chlorophyll measurements showed similar spatial variation (Figure 1.3.4-1 and 1.3.4-2). As thermal stratification began, spatial differences became more evident (Figuras 1.3.4-3 and 1.3.4-4). Cont ol stations standing crops were generally greater than standing crops measured at the plume stations. Maximum horizontal differences existed in the summer, coinciding with maximum vertical differencds in algal standing crops (Tables 1.3.4-3 through 1.3.4-5). After fall overturn, standing crops were again homogenously distributed in Lake Keowee (Figures 1.3.4-6). Phytoplankton standing crops at the cooling water stations (502.0 LSD, 509.5, and 508.0) were spatially similar on each date in 1976. The statistical analyses performed on density, biovolume, and chlorophyll indicated significantly greater: (1) densitics and biovolumes in 500.0 EZC samples as compared to 501.0 LSD, 508.5 LSD, and 509.5 LSD samples (p<0.001), and; (2) chlorophyll in 500 EZC samples than all other station samples (p<0.001) (Table 1.3.4-5). A total of 418 algal taxa have been recorded from Lake Keowee to date. There were 247 taxa identified in 1976, including 57 new taxa. Nineteen new chlorophyta, ten diatoms, eight chrysophytes, three cryptophytes, four blue-greens, two dinoflagellates, one chlorotonadophyte, and ten unknown species were found in the receiving water and entrained populations (Table 1.3.4-6). I Relative composition of the phytoplankton community varied considerably l in 1976 collections (Appendix B, Section 2). For EZC samples, diatoms l I 1.3.4-3 ONS 12/76
. _ _ _ _ _ _
l and green algae dominated the density, whereas diatoms and dinoflagellates ) contributed the g*eatest percentage of EZC biovolume. Diatoms dominated both the LSD densities and biovolumes on most occasions. These results were similar to the previous year during which diatoms and green algae had dominated the densities. In 1975 the biovolumes had been dominated by diatoms, dinoflagellates and a cryptophyte. During January, densities were dominated by Monoraphidium setiforme, whereas EZC biovolumes were dominated by Rhizosolenia eriensis. In March, coccoid green algae and M. setiforme dominated densities; Peridinium inconspicuum dominated biovolumes of EZC samples. In May, Erkenia subaequiciliata dominated densities; Cyclotella stelligera and R. eriensis , dominated biovolumes. In both July and September, coccoid greens usually dominated the density; Peridinium spp. dominated biavolumes. In November, coccoid greens dominated density; R. eriensis dominated biovolume. Lower sample depth (LSD) collections indicated that in January, M. setiforme dominated density (as with January EZC samples) and R. eriensis dominated biovolumes. In both March and May, 1976, C. stelligera dominated both density and biovolume estimates. C. stelligera, Chroomonas acuta and coccoid greens dominated densities, whereas C. stelligera contributed most of the biovolume during July. In September, coccoid greens dominated densities, P. spp. and Melosira _italica dominated biovolumes frequently. _ During November, R. eriensis and coccoid greens comprised most of the density; R. eriensis dominated biovolumes of LSD samples. There were minor differences in distribution of major species between lake control, plume, and cooling water stations EZC and LSD samples for 1976. Elevated pH values occurring in November, 1976 as compared to November, 1975 (Water Quality, Section 1.3.1) are attributed to increased EZC phytoplankton densities (44 to 60% greater in 1976) from 1975. Ammonia levels showed a decrease from October to November, 1976, in Lake Keowee and may be related to phytoplankton assimilation. The 1976 phytoplankton had smaller individual biovolume indicating higher metabolic rates. Algal productivity (carbon uptake) increased from September to November,1976, in entrained water for cooling at ONS (Phytoplankton-Zooplankton Entrainment Mortality, Section 1.5). November, 1976 entrainment productivity was typically four to five times greater than rates in November, 1975. Weather conditions (November,1976) consisting of mostly clear skies and diminished wind speeds for several days preceding sampling appear directly related to the stimulated algal productivity. The stimulation appears to have occurred in most of Lake Keowee surface waters, including both control and plume stations. At that time, ONS was operating at reduced CCW flows and inlet-outlet at (Section 1.1). Zooplankton Standing Crops (no./1) l Zooplankton standing crops in Lake Keowee were sampled monthly from ' January through December,1976. An additional 2 genera and 8 species were identified for 1976 (Table 1.3.4-7). Of the 44 genera found this l reporting period, 7 belonged to Copepoda (9 identified species),13 to l 1.3.4-4 ONS,12/76
.
Cladocera (16 identified species), and 24 to Rotifera (48 identified species). Only 2 to 6 adult taxa from each major taxonomic group were numerically dominant and they were: Copepoda - Diaptomus mississippiensis, Tropocyclops prasinus; Cladocera - Bosmina coregoni, Diaphanosoma leuchtenbergianum, Holopedium gibberum; Rotifera - Polyarthra cf. vulgaris, Synchaeta gectinata, Keratella spp., Collotheca spp., Conochilus unicornis, and Ptygura spp. Tables of major taxonomic group and individual taxa densities from bottom to surface and 10 m to surface tows for each month and station are given in Appendix B Section 3. Seasonal Trends - Standing crop data (expressed as number per liter) for lake stations (500, 501, 502, 503, 508.5, 504, 505, 506) were combined each month to yield a mean that estimated zooplankton abundance in Lake Keowee. It should be noted that these means were not weighted and are, therefore, plume station biased since the plume stations represent a relatively small percentage of the total lake volume. Total Zooplankton Total zooplankton densities from 10 m to surface peaked in March (66 no./1) and July (58 no./1) with the lowest densities occurring in January, February, November, and December (9 to 13 no./1) (Figure 1.3.4-7) . Zooplankton were more abundant in the upper 10 m strata from March through August and were more dispersed through the water column January, February, and September through December. Water temperature data indicated that the lake was thermally stratified from March through August with the destratified period occurring in January, February, and September through December (Water Quality, Section 1.3.1). The relative composition of zooplankton varied seasonally (Figure 1.3.4-8) but averaged 41% copepods, 14% cladocerans, and 45% rotifers for the combined lake stations. These percentages were similar to findings for 1975 (Duke Power Company 1975a, 1975b). Copepods were the dominant zooplankton from January to May, whereas, rotifers dominated from June to December. Copepoda Total copepod densities from 10 m to surface were lowest during the winter (2.2 to 5.5 no./1) and highest in the spring (28.6 to 34.1 no./1) (Figure 1.3.4-9). Copapods were more abundant in the upper 10 m strata during thermal stratification but were more dispersed through the vertical water column during the destratified period (Figure 1.3.4-9). Seasonal abundances from 10 m to surface for the dominant copepod taxa are presented in Figure 1.3.4-10. Diaptomus mississippiensis peaked in April (5.7 no./1) with density remaining below 2.1 no./l the remainder of the year. Tropocyclops prasinus did not exhibit a distinct peak; 1.3.4-5 ONS 12/76 l l m__.-___ _ f
--. - . _ -
density remained below 1.2 no./l during 1976. Nauplius exhibited a pronounced density pulse from March to June (18.1 to 19.7 no./1) with lowest density occurring in January, February, November, and December (1.4 to 3.0 no./1). Calanoid copepodid numbers were high-est in March and April (6.6 to 6.7 no./1) and lowest January, November and December (0.4 to 0.5 no.11). Cyclopoid copepodid density ranged from 0.1 to 0.3 no./1 during the winter and peaked in May (2.8 no./1). Combined, the immature forms comprised 90% of the total copepod standing crop with D. mississippiensis and T. prasinus comprising 80% of tha adult copepod standing crop during 1976; these findings were similar . to those for 1975. . Cladocera Total cladoceran standing crop from 10 m to surface for the combined
lake stations was consistently low throughout 1976 (Figure 1.3.4-9). Except for a March peak (16.3 no./1) density remained below 6.5 no./1. No seasonal differences in the vertical distribution of cladocerans were noted. Seasonal abundances from 10 m to surface of the numerically dominant cladoceran species are diagrammed in Figure 1.3.4-11. Bosmina coregoni density peaked in March (11.0 no./1) and September (4.8 no./1), Diaphanosoma leuchtenbergianum in March (2.0 no./1) and May (4.0. no./1), and Holopedium gibberum in March (1.5 no./1) and June (2.4 no./1) . Combined, these three species comprised 90% of the total cladoceran
,
standing crop for 1976. Rotifera Total rocifer density from 10 m to surface peaked in March (21.5 no./1) and July (41.7 no./1) (Figure 1.3.4-9). Density was lowest in January, February, and December (2.7 to 4.1 no./1). Rotifers were more abundant i in the upper 10 m strata during the thermally stratified months but l were more dispersed through the vertical water column during the de-stratified months. The seasonal abundances of six prevalent rotifer taxa are given in Figures 1.3.4-12 and 1.3.4-13. Polyarthra cf. vulgaris density was high during the spring and summer with peaks occurring in April (4.5 no./1) and July (3.5 no./1); density ranged from 0.3 to 1.0 no./1 during the fall and winter. Synchaeta pectinata peaked in March (3.8 no./1) and July (4.4 no./1) with numbers rarely exceeding 0.9 no./1 the remainder of 1976. Keratella spp. (predominantly K. crassa and cochlearis) exhibited a distinctive density peak in July (17.1 no./1)
.with density remaining below 5.9 no./l the remainder of the year.
Collotheca opp. (including C. balatonica, discophora, libera, and mutabilis) density peaks ~ occurred in March and August (6.1 no./1); 1.3.4-6 ONS 12/76
low density (0.4 to 0.7 no./1) occurred in January, April, May and October through December. Conochilus unicornis exhibited a distinctive density peak in March (5.0 no./1) with numbers remaining below 1.5 no./1 the remainder of the year. A Ptygura spp. (predominantly P. libera) density pulse was indicated from June to September (2.4 to 4.9 no./1); density remained below 0.3 no./l for the remaining months. The prementioned rotifer taxa comprised 75% of the total retifer community for 1976. Polyarthra spp., Synchaeta spp., Kernea?.la spp., Collotheca spp. , Conochilus unicornis and Ptygura spp, were common during 1975 and exhibited seasonal abundances that were generally similar to 1976 abundances.
.
Station Comparisons Zooplankton monthly standing crop data from 10 m to surface were grouped into two thermal period categories based on 1976 monthly water temperature data (Water Quality, Section 1.3.1): stratified (March through August) , and destratified (January, February, and September through December). ' Total Zooplankton Total zooplankton density from 10 m to surface at each station for each thermal period is presented in Figure 1.3.4-14. ANOVA and Duncan's Multiple-Range Test results indicated that total zooplankton density increased with distance from the ONS discharge during til stratified thermal period. For that period, density was significantly lower in the discharge (508) compared to all ONS plume stations (508.5, 504, 505, 503); densities at most plume stations (508.5, 504, 505) were significantly lower than at reference sentions (500, 501, 506) (Table 1.3.4-8). During the destratified period, total zooplankton densities in the discharge (508) and at plume stations in the immediate area of the ONS discharge i (508.5, 504) were significantly lower than density at two reference I stations (500,506); the density at station 500 was significantly higher l than the densities at all other stations but station 506 (Table 1.3.4-8). Total zooplankton densities in the intake (509.5) and discharge (508) were significantly lower than at the lake-side of the skimmer wall station (502) during the stratified thermal period but not during the destratified period (Table 1.3.4-8). Total zooplankton densities from 10 m to surface at the lake-side of the skimmer wall station, in the intake, and in the discharge are compared in Figure 1.3.4-18. During the stratified period (March through August), total zooplankton densities in the intake and discharge were 79 and 81% lower than the density at the lake-side of the l skimmer wall station. ' The percent composition of total zooplankton for the major taxonomic categories at reference stations (500, 501, 506), in the intake (509.5), in the discharge (508), and at ONS thermal plume stations (508.5, 504, 505) are given in Table 1.3.4-9 for the stratified and destratified i thermal periods. During the stratified period, copepods dominated the I 1 1.3.4-7 ONS 12/76 l l l
zooplankton standing crop at reference stations, in the intake, and in the discharge, comprising 40 to 48%; rotifers were the dominant group at the plume stations comprising 48% of the total zooplankton population. For the destratified period, rotifers dominated the reference stations comprising 49% of the total zooplankton community. Copepods and rotifers comprised 36 and 37%, respectively, in the intake and 40 and 38%, respective-ly, at the plume stations. Copepods, cladocerans, and rotifers contri-buted almost equally to the zooplankton standing crop in the discharge during the destratified period, comprising 34, 31 and 35%, respectively. Copepoda
.
Total copepod density from 10 m to surface at each station (exclud.'.ng 509.5) for stratified and destratified thermal periods is given in Figure 1.3.4-15. ANOVA and Duncan's Multiple-Range Test results indicated that copepod density increased with distance from the discharge during the stratified period. For that period, total copepod densities in the discharge (508) and at plume stations in the immediate area of .he discharge (508.5, 304) were significantly lower than the densities at plume stations more removed from the ONS discharge (503, 505); density at plume station 505 was significantly lower than densities at two reference stations (500, 501). Total copepod density'at reference station 506 was significantly greater than densities in the intake and at plume stations in the immediate area of the discharge for the stratified period. During the destratified period total copepod density was similar among stations except for a significantly higher density at station 500 (Table 1.3.4-8). Total copepod densities in the intake and discharge were significantly lower than density at the lake-side of the skimmer wall station during the strati-fied period but not during the destratification period (Table 1.3.4-8). To-tal copepod densities from 10 m to surface at the lake-side of the skimmer wall station, in the intake, and in the discharge are compared in Figure 1.3.4-18. During the thermally stratified period copepod densities in the intake and discharge were 79 and 82% lower than the density at the lake-side of the skimmer wall station. Cladocera Total cladoceran densities were low (16 no./1) at all lake stations during the stratified and destratified periods (Figure 1.3.4-16). ANOVA results indicated that there was no significant difference in standing crop among stations for either thermal period (Table 1.3.4-8). Rotifera Total rotifer density from 10 m to surface at each station (excluding 509.5) for each thermal period is indicated in Figure 1.3.4-17. ANOVA and Duncan's Multiple-Range Test results indicated that rocifer density increased with distance from the ONS discharge during the stratified 1.3.4-8 ONS 12/76
_
period (Table 1.3.4-8). For that period total rotifer density was significantly lower in the discharge (508) than at all ONS plume stations (508.5, 504, 503, 505); densities at plume stations in the immediate area of the discharge (508.5. 504) were significantly lower than densities at reference stations (500, 501, 506) (Table 1.3.4-8). During the destratified period rotifer densities were significantly lower in the discharge and at plume stations in the immediate area of the discharge compared to densities at two reference stations (500, 506); density at station 500 was significantly higher than at all other stations but station 506. Total ratifer densities in the intake (509.5) and discharge (508) were significantly lower than density at the lake-side of the skimmer wall
- station (502) during the thermally stratified period (Table 1.3.4-8).
During the destratified period there was no difference among those three stations. Total rotifer densities from 10 m to surface in the intake, discharge, and at the lake-side of the skimmer wall station are compared in Figure 1.3.4-19. During thermal stratification (March through August), rotifer densities were 79 and 84% lower in the intake and discharge than at the lake-side of the skimmer wall station. ONS Operation Effects Water temperatures in the immediate area of the discharge for 1976 (Water Quality, Section 1.3.1) did not reach thermal tolerance levels (30 C) for the majority of the zooplankton taxa (Bunting 1976). In fact, temperatures observed in the discharge and plume area during 1976 could stimulate zooplankton production (Coker 1934, Gelling et.al. 1972, Pourriot 1969, Robertson 1971). However, zooplankton densities were comparatively low in these areas, particularly during thermal stratifi-cation. Minimum dissolved oxygen concentrations observed in the dis-charge area (4.0 mg/1) during the year were not sufficiently low to be lethal to the zooplankton (<2.0 mg/1) (Sprague 1962, Bogatova 1962). The exclusion of zooplankton from the intake canal by the skimmer wall, particularly during the stratified period, accounted for the decreased standing crops observed in the discharge and plume areas. The ONS
,
l thermal effluent, significantly low in zooplankton density, diluted density in the discharge area. This dilution factor diminished with increased distance from the discharge area resulting in a gradual recovery of zooplankton density; it is speculated that increased secondary production could have contributed to the recovery of zooplankton density. During the stratified period zooplankton densities were significantly lower in the immediate discharge area than at plume stations more distant from the ONS discharge; densities at the more distant plume stations were significantly lower than at reference stations. During the destratified period, skimmer wall exclusion and dilution effects were greatly reduced. Zooplankton density was usually similar among ' stations except for a significantly higher density at station 500. It 1.3.4-9 ONS 12/76
_ _ - _ . _ _ - _ -___ __- - ____ _ should be noted that nutrient levels were characteristically high at station 500 (apparently originating from a point source) which could account "or the high density (Water Chemistry Section 1.3.1). Similar spatial trends were noted for 1975 (Duke Power Company 1975a, 1975b) but they were not statistically documented. IV.
SUMMARY
AND CONCLUSIONS Phytoplankton
"
Lake Keowee phytoplankton standing crops in 1976 collections showed maximum vertical differences (based on density, biovolume, and chlorophyll concentrations), from May through September when maximum thermal differences from surface to bottom occurred. Maximua horizontal differences persisted throughout the summer with lake control stations exhibiting greater standing crops than plume stations. This trend was also noted in 1975 (Duke Power Company 1975a, 1975b). When maximum vertical thermal grad-ients occurred, ONS intake and subsequent discharge of lower strata suter diluted the phytoplankton concentrations in the ONS discharge nixing zone. During isothermal conditions, the dilution effect was less pronounced since lower depth and surface phytoplankton concentrations were similar. Densities, biovolumes, and total chlorophylls averaged 46%, 33% and 28%, respectively, lower at the plume stations than at the lake controls during 1976. Thermal elevations could not account for the observed differences with the phytoplank-con community of Lake Keowee during 1976. Zooplankton Zooplankton standing crops were sampled monthly. Data for 1976 indicated that the numerically important species and their seasonal trends were similar to findings reported previously. Statistical comparisons of zooplankton standing crop data indicated that zooplankton density increased with distance from the discharge area during thermal stratification (March through August). During that period zooplankton densities were significantly lower in the immediate discharge area than at plume stations more distant from the ONS discharge; densities of the more distant plume stations were significantly lower than at reference stations. During the destratified period (January, February, and September through December) zooplankton densities were usually similar among stations except for significantly high standing crops at station i 300 which is characteristically high in nutrient concentrations (apparently l originating from a point source). Data indicated that the maximum water temp-l erature and minimum b0 concentration observed in the immediate discharge area during thermal stratification did not exceed max <<.um tolerance levels for most of the zooplankton taxa. The exclusion of zooplankton from the intake canal by the skimmer wall, particularly during thermal stratification, acccunted for the significantly low standing crops observed in the ONS discharge and thermal plume areas. 1.3.4-10 ONS 12/76
.
4 The ONS thermal effluent, significantly low in zooplankton density, diluted density in the discharge area. This dilution factor diminished with increased distance from the discharge area resulting in a gradual recovery of zooplankton density. Similar differences in zooplankton density among sampling stations were noted for 1975 but they were not statistically documented. LIfERATURE CITED ' Bogatova, I. B. 1962. Lethal ranges of 02 content, temperatures, and pH for come representatives of the family Chydoridae. (In Russian). Zool. Zhur. 41:58-62. Bunting, D. L. 1976. Zooplankton: Thermal regulation and stress. Proceedings of a symposium on " Energy production and thermal effects." Coker, R. E. 1934. Reaction of some freshwater copepods to high temperatures. J. Elisha Mitchell Sci. Soc. Duke Power Company. 1973a. Appendix B to Facility Operating License Nos. DP -38, DPR-47, and DPR-55, Technical Specifications for the Oconee Nuclear Station Units 1, 2, and 3, Duke Power Company. U. S. Atomic Energy Commission, Docket Nos. 50-269, 50-270, and 50-287 (revised August 1, 1975, NRC), Washington, D. C. ~
. 1973b. Oconee Nuclear Station. Semi-Annual Report, Period Ending June 30, 1973.
.
1973c. Oconee Nuclear Station. Semi-Annual Report, Period Ending December 31, 1973.
.
1974a. Oconee Nuclear Station. Semi-Annual Report, Period Ending June 23, 1974. '
.
1974b. Oconee Nuclear Station. Semi-Annual Report, i Period Ending Decembur 31, 1974.
. 1975a. Oconee Nuclear Station. Semi-Annual Report.
Period Ending June 30, 197.i.
.
1975b. Oconee Nuclear Station. Semi-Annual Report, Period Ending December 31, 1975. Duncan, D. B. 1955. Multiple range and multiple F tests. .Biometrics. 1 l 11: 1-42. ! 1.3.4-11
, ONS 12/76
Edmondson, W. T. 1960. Reproductive rates of rotifers in natural populations. Mem. 1st. Ital. Idrobiol. 12: 21-77. Celling el. al. 1972. The effect of temperature on the development rate of the major life stages of Diaptomus pallidus. Herrick. L. and O. 17: 304-307. Lilliefors, H. W. 1967. On the Kolmogorov-Smirnov test for normality with mean and variance unknown. Am. Stat. Assoc. J. 62: 399-402. Pourriot el. al. 1969. Research on the biology of some planktonic rotifers. - Soc. Zool. de France. 94: 111-118. Robertson, S. D. 1971. The effects of temperature on instar duration and egg development of Daphnia pluex Leydig. M. S. Thesis. University ! of Tennessee, Knoxville. 55 pp. Sokal, R. R. and F. J. Rohlf. 1969. Biometry. W. H. Freeman and Co., San Francisco. 776 p. Sprague, J. B. 1962. Resistance of four freshwater crustaceans to lethal high temperature and low oxygen. J. Fisheries Research Board Canada. 20: 2. Steele, R. G. D. and J. H. Torrie. 1960. Principles and Proce(-,ces of Statistics. McC;aw-Hill Book Company.
.
1.3.4-12 ONS 12/76 t
.
Table 1.3.4-1 Summary of Euphotic Zone (EZ), Lower Sample (LS) and Secchi Disc (SD) depths (meters) for phytoplankton collections, Lake Keowee, SC, 1970 Station January 13 Furch Ib May 12 July 9 September 14 November 9 EZ LS SD EZ LS SD EZ LS SD E2* 13 SD EZ LS SD EZ I,S SD 500 5.0 23 2.4 6.5 21 2.9 6.5 21 3. 5 7.0 20 2.1 5.0 20 2.2 5.0 20 2.h Lake Controt 501 5.0 20 2.6 7.5 22 3.6 10.0 30 5.1 12.0 30 4.6 8.0 30 3.9 5.0 10 2.4 Stations 506 5.0 32 2.4 6.0 35 3.4 8.5 30 3.3 8.0 35 2.5 4.0 33 2.9 5.0 30 2.0
.
Sa on 509.5 3.8 10 2.2 5.5 11 2.6 7.5 10 3.5 6.0 12 2.3 4.5 11 2.5 4.0 10 2.3 T
- "
I"fg'*[8' 508 5.5 10 2.5 6.5 9 2.8 8.0 10 3.5 7.0 9 2.0 5.0 12 2.4 5.0 10 2.4 502 5.0 25 2.2 6.5 27 3.0 8.0 24 3.7 8.0 25 3.4 6.0 25 3.0 4.5 25 2.4 503 5.0 22 2.4 6.0 23 2.6 7.0 24 3.3 9.0 25 2.7 5.0 23 2.3 5.0 25 2.2 Pl ume Stations 505 5.0 32 2.4 6.0 35 2.9 9.5 31 3.5 8.0 33 2.4 5.0 32 2.5 4.0 30 2.1 508.5 4.5 20 2.2 6.0 15 2.8 7.0 20 3.2 7.5 17 2.7 5.0 21 2.5 4.5 25 2.1 0 The euphotic zone was measured with a Montedoro-Whitney Solar Illuminance Meter Model LHT-8B; all other dates a Model I.MD-8A was used. 8 m 0 o
.
- . _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ - - _
. _ . - - - . _ - - _ - _ . _ _ _ - _ _ _ _ _ _ _ _ _ _ _ _ _ _ __ , _ _
.
Table 1. 3.4-2 Summary of rhytoplankton community densities (X10 units /m ) of Lake Keowee. SC in the vicinity of ONS. 1976. liay 12 July 9 September 14 November 9 Mean Station January 13* 2: arch 16 697 1197 3969 956 1255 500.0 EZC 515 195 774 410' 106 202 567 2d23 534 LSD 684 721 692 650
. 501.0 LZC 514 219 1073 n rol. 574
.489 224 314 1286 612 517 Stations- 506.0 EZC 287 204 112 158 602 253 192 LSD 695 1C56 1767 722 826 haan' EZC 500 213 154 521 1063 316 410 LSD 285 112 23C 270 517 567 342 Intake '509.5 EZC 278 188 164 298 483 483 297 Station LSD 238 129 7
t* 307 166 249 341 288 475 [ Cischarge 508.0 EZC 322 277
** - 244 160 270 521 270 194 Statien LSD 1026 462 530 $25 502.0 E2C ~589 264 200 31L 301 759 331 LSD 263 166 185 668 257 374 368 503,0 EZC 324 230 352 285 170 450 242 Plume LSD 2u1 176 172 509 478 Stations 505.0 EZC 542 203 174 .668 571 549 230 LSD 194 86. 94 305 154 300 479 428 508.5 . EZC 515 163 343 767 204 210 169 168 LSD 142 89 197 215 .287 832 398 473 450 Mean EIC 492 129 162 276 203 482 243 LSD. 200-
.g
- Values for January are averages of duplicate aanples.
4:
<Z ~EZC - Euphotic Zone Composite U LSD - Lower Sample Depth
.
__
.__4
Table 1. 3.4- 3 Summary of t hytoplankton community biuvolumes (mm /m ) of Lake Keowee. SC. in the vicinity of ONS. 1976. Station January 13* tbrch 16 tiay 12 July 9 September 14 November 9 Mean 500.0 EZC 346.4 170.6 225.2 1085.4 1334.7 463.7 604.3 LSD 303.6 08.7 65.6 169.8 641.3 416.2 277.5 501.0 EZC 373.h 111.9 472.8 1094.1 355.3 253.7 443.6 t;;;,,, tSD 163.7 89.0 37.0 79.2 57.2 144.5 95.1 Stations 506.0 LZC 357.8 63.8 234.0 714.6 424.7 268.7 34 3.9 LSD 129.0 56.1 73.9 340.2 127.5 . 145.1 145.3 Hean EZC 359.3 115.4 310.7 946.7 704.9 328.7 464.0 LSD 193.8 71.3 58.8 196.4 275.3 235.3 172.6 Intake 509.5 EZC 194.3 112.3 74.7 101.1 288.4 481.4 208.7 I* Station LSD 165.8 116.2 84.8 89.1 157.2 241.5 142.4 Y T C Disc La rge 508.0 LZC 195.0 102.6 118.2 143.2 96.1 129.8 1 30.8 Station LSD 157.3 88.0 137.7 137.0 158.0 161.8 140.1 502.0 EZC 398.9 1 31.2 117.2 1068.6 261.1 246.6 370.6 LSD 205.1 90.1 65.1 63.2 85.5 398.2 151.2 503.0 LZC 27 ) 5 118.5 142.1 811.9 69.9 175.7 255.3 Plume LSD ..6 114.8 67.5 91.6 110.8 267.6 125.6
' ' " "
5C5.0 L2C 335.4 158.7 90.7 1104.2 254.9 209.7 158.9 LSD 73.4 36.6 37.2 111.1 57.4 548.7 344.1 508.5 LZC 349.2 161.6 201.5 465.6 88.6 246.5 252.2 LSD 80.3 64.2 127.8 67.1 91.0 108.6 89.8 kan EZC 324.3 142.5 137.9 862.6 168.0 219.6 309.2 LSD 110.1 76.4 79.4 83.3 86.2 330.6 127.7
.
- Values for January are averages of duplicate camples.
C EZC - Euphotie Zone Composite {{ LSD - Lower Sample Depth
.
.- . ._. - .. . - . - . - . _ - -
Table 1. 3.4-4 Summary of Lake Keowee total chlorophyll concentrations (mg/m ). 1976. March 16 May 12 July 9 September 14 November 9 January 13 Replicate Replicate Rep 11cato Rcplicate Replicate _ deplicate_ flean A Mean A B Mean Mean A B Mean A B Mean A B !!ean A B B Station /Sar$_le 1.48 2.62 1.43 1.43 1.43 1.50 1.54 1.52 2.87 3.08 2.98 1.99 2.69 2.34 5.66 6.21 5.94 1.78 1.17 500 EZC 2.03 1.86 LSD 1.46' 1.10 1.28 0.79 0.75 0.77 0.71 0.78 0.74 0.38 0.44 0.41 5.45 6.42 5.94 2.07 1.99 3.19 2.90 2.40 2.65 0.98 0.90 0.94 1.84 501 E2C 1.08 1.21 1.14 1.18 1.02 1.10 1.99 2.07 2.03 3.69 2.69 0.29 0.65 0.60 0.62 1.27 0.95 1.11 0.84 Lake LSD 0.93 1.08 1.04 0.64 0.72 0.68 0.62 1.93 1.28 0.29 0.28 Control 2.25 0.53 0.84 0.68 2.03 Stations 1.52 1.52 1.52 2.13 1.89 2.01 1.61 1.78 1.70 4.00 4.00 4.00 2.13 2.37 500 EZC 0.79 1.66 1.26 1.46 0.99 LSD 1.10 1.44 1.27 0.61 0.61 0.61 0.81 0.62 0.72 1.07 1.15 1.11 0.81 0.77 2.24 3.18 3.61 1.03 2.16 Mean EZC 1.36 1.54 1.23 0.69 0.91 0.60 2.45 1.53 LSD 1.20 0.75 0.71 0.97 0.84 0.38 0.34 0.36 1.17 0.99 1.08 0.60 0.72 0.66 0.80 F Intake 509.5 EZC 1.08 1.08 1.08 0.61 0.89 0.83 0.88 0.99 0.63 0.81 1.07 1.00 1.04 1.00 1.11 1.06 0.54 0.43 0.49 0.92 1.24 1.08 0.85 0.81 y Station LSD I 0.8F, 1.20 0.57 1.19 0.88 0.83 1.11 1.00 0.71 0.78 0.74 0.93 Discharge 508 Etc 0.74 0.99 0.87 0.93 0.90 1.24 1.17 0.86 1.01 1.20 1.31 1.26 0.45 0.49 0.47 0.99 0.85 0.92 0.49 0.80 0.64 Station LSD 0.72 1.02 0.87 1.04 0.98 0.91 1.02 0.97 2.48 2.69 2.58 1.78 1.49 1.64 2.41 4.17 3.29 1.64 1.67 1.66 0.79 0.53 0.66 1.80 502 EZC 0.70 0.72 0.'71 LSD 0.97 1.02 1.00 0.68 0.68 0.68 0.70 0.88 0.79 0.36 0.37 0.36 0.69 0.71 0.69 0.75 1.38 1.68 1.84 1.20 1.52 0.81 0.61 0.71 1.37 503 LZC 1.27 1.21 1.24 1.78 1.64 1.71 1.26 1,49 1.96 1.40 0.69 0.71 0.87 1.02 0.91 0.96 0.84 1.06 0.95 0.30 0.31 0.31 0.45 0.56 0.50 0.69
- LSP 0.74 0.99 2.06 1.99 1.28 1.64 3.18 3.30 3.24 1.93 1.70 1.82 0.81 0.80 0.80 1.83 SC5 EC 1.49 1.32 1.41 2.17 1.96 0.66 0.48 0.41 0.50 0.46 0.59 0.57 0.58 0.47 0.47 0.47 0.b0 0.82 0.81 LSD 1.19 1.21 1.20 0.47 0.48 tafons 1.18 0.56 1.19 508.5 EZC 1.05 0.97 1.01 1.70 1.75 1.72 1.31 1.17 1.24 1.79 1.07 0.45 1.43 1.11 1.26 0.42 0.55 0.58 0.55 0.74 0.64 0.57 LSD 0.66 0.66 0.66 0.73 0.64 0.68 0.62 0.55 0.58 0.45 0.45 0.42 0.41 1.48 2.41 1.54 0.68 1.55 Mean EZC 1.16 2.02 0.66 0.70 0.70 0.42 0.52 0.72 LSD 0.93
@
m kk E2C - Euphotic Zone Composite y LSD - Lower Sample Depth
* - Sample tube broke in centrifuge ONS 12/76
.
-
.
.
Table 1.3.4- 5 Analysis of variance results for phytoplankton density, blovolume and total chlorophyll measurements for 18 stations (nine locations with EZC and LSD) on six dates,1976. , Source df SS MS F Probability Duncan's Range Test of Means Density among stations 17 3.839 0.226 3.37 (< 0.001) 500 EZC > 501 LSD, 508.5 LSD, 509.5 LSD Among e tes within stations (error) 90 6.0 0.067 (Data Log 10 transformed) Total 107 9.839 F.001 (15, 60) = 3.08 Biovolume among stations 17 4.762 0.281 3.18 (<0.001) 500 EZC > 501 LSD, 508.5 LSD, 509.5 LSD Among dates within stations (error) 90 7.935 0.088 (Data Log 10 transformed) I Total 107 12.697 Y T t; Chlorophyll among atations 17 1.959 0.115 .58 (<0.001) F.001 (15, 120) = 2.78
,Among dates within stations (error) 198 2.442 0.012 Total 215 4.401 Duncan's Range Test of Chlorophyll Samples (hlRheSt ++
lowest} 500E 506E 505E 501E 502E 5008 503E 508.5E 5068 508E 509.58 508B 501B 509.5E 5028 503B 505B 508.5B 8 E = EZC U B = LSD 3 a e _ . _ _ _ _ _ _ _ _ _ . _ _ _ _ _ _ _ __
_ _ _ _ Page 1 of 9 Table 1.3.4-6 Phytoplankton Species Checklist for Lake Keowee through December,1976 Division: Chlorophyta Class: Chlorophyceae
- Ankistrodesmus f alcatus (Corda) Ralfs
- j1._ f alcatus var acicularis (Braun) G. W. G. West W. West
- ji._ f alcatus var. mirabilis (West & West)
- A_. f usif ormis Corda sensu Korsch
**jl. spp.
_
- Arthrodesmus incus (Breb.) Hass.
- A. incus var, extensus Anderson
- A_. subulatus Kutz.
*31. spp.
G. M. Smith _ Asterococcus limneticus 32,spp.
- Bambusina brebissonii var. gracilescens Wolle.
** Binuclearia eriensis Wittrock Botryococcus sudeticus Lemm.
Carteria klebsii (Dang.) Dill Gj,spp. Cerasterias staurastroides West & West Chlamydomonas mucicola Schmidle
*Sb.spp.
Chlorella ellipsoiden Gerneck.
- C_._ homosphaera Skuja
- C. vulgaris Beyer.
*Sb.spp.
Closteriopsis longissima Lc:=. 56,longissima var. tropica West and West
** Closterium ceratium Perty Cb, gracile Breb.
C.,incurvum Breb.
- C. pusillum Hantz.
I (Breb.) Krieg.
*ji[venusvar.incurvum C6,spp.
- Coccomonas spp.
- Coelastrum cambricum Archer
- C_.,microporum Naeg.
_
- C. reticulatum (Dang.) Senn.
_ E sphaericum Naeg. Sb.spp. Cosmarium abbreviatum Raciborski C. abbreviatum var. minor West & West S asphaerosporum Nordst.
- Sb,asphaerosporum var. strigosum Nordst.
- Observed during the sampling period of January through December, 1976
** Observed for the first time during the above sampling period
-
1.3.4-18 ONS 12/76
,
Table 1. 3.4-6 (Cont. ) Page 2 of 9 C. botrvtis Meneg. C. cosmetum West & West Cb,phaseolus var. minor Boldt. Cb,portianum Archer L suberenatum Hantz.
*C. tenue Archer Cb,tinctum Ralfs
*C spp.
*Cosmocladium saxonicum DeBary Cb,spp.
*Crucigenia apiculata (Lemm.) Schmidle C. fenestrata Schmidle
**[[irregularis Wille Cb, quadrata Morren .
*C. tetrapedia (Kirch.) West & West
$b.spp.
Desmatractum indutum (Geitler) Pascher
*Dictyosphaerium ehrenbergianum Naeg. *D. pulchellum Wood *D.,spp.
Dysmorphococcus variabilis Takeda D.spp. ,
- Elakatothrix gelatinosa Wille Sb.spp.
**Euastrum spp.
Eudorina spp.
*Franceia droescheri (Lesa.) G. M. Smith *Gloeocystis gigas (Kutz.) Lag. *G. planctonica (West & West) Lemm. **G. vesiculosa Naeg.
Sb.spp. Golenkinia paucispina West & West
*Gy, radiata Chod.
Gonatozygon aculeatum Hast. E monotaerium DeBary
**Gyromitus cordiformis Skuja Haematococcus lacustris (Girod.) Rostaf.
'
,
Kirchnnriella contorta (Schmidle) Bohlin K. elongata G. M. Smith K. lunaris (Kirch.) Moebius j
}6,lunaris var, dianae Bohlin i *K spp.
Lagerheimia spp. Micractinium pusillum Fres. Eb.spp.
**Monoraphidium braunii Naeg.
*M. contortum Thur.
**pl. irregulare G. M. Smith
**M. pusillum Printz
*tl., saxatile Kom.-Legn.
**M. setiforme (Nyg.) Kom-Legn.
.Q. spp.
_ Mougeotia elegantula Wittrock
*M. spp.
Nannochloris spp. 1 1.3.4-19 ONS 12/76
. . _ - - _ _ 7
Page 3 of 9 Table 1.3.4 6 (Cont. ) iNephrocytium agardhianum Naeg. N. limneticum (G. M. Smith) G. M. Smith Docystis borgei Snow
- 0. elliptica W. West i[[lacustris Chod.
*0. parva West & West *0. pusilla Hansgirg *0. submarina Lag. *0 3 spp. *Pediastrum duplex Meyen duplex var. gracilimum West and West **P.~P. tetras ( Ehr. ) Ralfs Penium spp.
Planktonema lauterbornii Schmidle ,
*Planktosphaeria gelatinosa G. M. Smith *Quadrigula closterioides (Bohlin) Printz *g. lacustris (Chod.) G. M. Smith Sb.spp. ** Rhizoclonium spp. *Scenedesmus abundans (Kirch.) Chod. *S. abundans var. brevicauda G. M. Smith *S. abundans var. longicauda G. M. Smith *j[[acuminatus (Lag.) Chod. *Sb,armatus (Chod.) G. M. Smith S. armatus var. bicaudatus (Gug.-Printz) Chod.
S7 bernardii G. M. Smith
*][," bij uga (Turp.) Lag.
- S. brasilier.sts Bohlin
- S_._ denticulatus Lag.
~S. denticulatus var. linearis Hansgirg
- S. dimorphus (Turp.) Kutz.
- Sj, ecornis (Ralfs.) Chod.
S. granulatus West & West
- SC opoliensis var. contracta Prescott
*][[ quadricauda (Turp.) Breb.
- Sj, quadricauda var. longispina (Chod.) G. M. Smith
*$b.spp.
Schizochlamys spp. Schroederia setigera (Schroeder) Lemm. Selenastrum gracile Reinsch
*jb,minutum (Naeg.) Collins S. westii G. M. Smith
- Sphaerocystis schroeteri . Chod.
Sphaerozosma granulatum Roy & Biss. Staurastrum arctiscon (Ehr.) Lundell
** S. curvatum W. West
*j[[ curvatum var. elongatum G. M. Smith
- h cuspidatum Breb.
S. cuspidatum var. divergens Nordst.
*][[ dej ectum Breb.
*S. 11mneticum var. cornutum G. M. Smith
**57 megacanthum Lundell
- S[ ophiura var. cambricum (Lund.) West & West
*E paradoxum var. parvum W. West
*j][pentacerum (Wolle) G. M. Smith 1.3.4-20
-
ONS-12/76_. / -
. , _ . _ _ _ _,
,
, Table 1. 3.4-6 (Cont. ) .Page 4 of 9 Si quadricuspidatum Turner
*S. tetraccrum Ralfs.
**S: SpP. .
Tetraedron caudatum (Corda) Hansgirg.
*]., minimum Braun
** T. muticum (Braun) . Hansgirg Ji regulare var. incus Teiling
*T t spp.
**Tetraspora lamellosa Prescott Tetrastrum glabrum (Roll) Ahlstrom & Tiffany
**]. heteracanthum (Nordst.) Chod.
Treubaria setigerum (Archer) G. M. Smith
;
Xanthidium cristatum var, uncinatum f. mucronata W. West . Division: Chrysophyta ' Class: Bacillariophyceae Achnanthes inflata (Kutz.) Grun.
*A. microcephala (Kutz.) Cleve
'
*h minutissima Kutz.
;
- A_. spp.
*Asterionella formosa Hass.
*Attheya zachariasi Brun.
Cocconcis spp.
) Cyclotella kutzingiana Thwaites l *Cb,meneghiniana Kutz.
C. michiganiana Skvortzow
'*C. stelligera (Cleve) Van Heurck '
AC. spp. Cymbella affinis Kutz.
!
- Cy,naviculiformis Auerswald Cb,turgida Greg.
, *Ci spp.
! **Denticula thermalis Kutz.
Diploneis spp.
*Eunctia flexuosa (Breb.) Kutz.
- Eb,naegelii Migula l *Eb,zasuminensis (Cab.) Koerner
;
- E,_:,, s p . A, _
; *Ei.spp.
*Fragilaria crotonensis Kitt.
! F_:, s p p .
Frustulia spp. I Gomphonema constrictum Ehr.
**Ci parvulum (Kutz.) Kutz.
G spp. ,._ Gyrosigma spp. Hannaea arcus (Ehr.) Patr.
- c.Melosira distans var. alpigena Grun.
aM.'distans var. A.-
- i. }[._ granulata (Ehr.) Ralf s
- i. M . italica (Ehr.) . Kutz. ' _ _ ______ -
l ~ AM.~ italica var. tenuissima (Grun.) Mull. ANavicula cryptocephala Kutz. n L exigua-Greg. Ex Grun. N. gysingensis_ Foged. cN.Snotha Wallace,
,
$ 'l.3.4-21 ONS 12/76
;
4
^
, - r =-, v ..-- + r--, , , ;g- -- - , ,
Page 5 of 9 Table 1.3.4 6 (Cont.)
*N. pupula Kutz N. pupula var. el.iptica l Hust.
!b,pupula var. mutata (Krasske) Hust.
*h subtilissima Cleve
_N_.,viridula var. linearis Hust.
*N spp.
**Neidium spp.
*Nitzschia acicularis (Kutz.) W. Smith
*N. angustata (W. Smith) Grun.
_Ni dissipata (Kutz.) Grun.
- N_. filiformis
,
(W. Smith) Schutt
**N. gracilis Hantzsch -
*N. kutzingiana Hilse N. linearis (Agardh) W. Smith
*N. lorenziana var. subtilis Grun.
*1b,palea (Kutz.) W. Smith
*N. sublinearis Hust.
*N s spp.
**Pinnularia braunii var. amphicephala (A. Mayer) Hust.
*P. biceps Greg.
P. crucifera Cleve-Euler
**[.,gibba Ehr.
_P mesolepta (Ehr.) W. Smith _P.,mesolepta var. angusta Cleve
*P.z spp.
*Rhizosolenia eriensis H. L. S'mith
*R. longiseta Zach.
Rhoicosphenia curvata (Kutz.) Grun. Stauroneis phoenicenteron (Nitz.) Ehr. j[._ spp.
**Stenopterobia intermedia (Lewis) Breb.
Surirella linearis W. Smith jb spp.
*Synedra acus Kutz.
**S. nana Meister.
*5." radians Kutz.
{{.rumpens Kutz.
*S. rumpens var. scotica Grun.
*[5[ ulna (Nitz.) Ehr.
**S.,sp. A.,
*S spp.
*Tabellaria fenestrata (Lyngb.) Kutz.
*T_. flocculosa
_ (Roth) Kutz.
**T spp. __ _
.Terpsinoe americana (Bail.) Ralfs '
_' Class: Chrysophyceae __._ - Chromulina-stellataPascher
- ~* C_ . s p p .
**Chrysococcus spp.
*Chrysosphaerella longispina Laut.
*Dinobryon bavaricum Imhof-
**D _ campanulostipitatum Ahlstrom
_ i D;. cylindricum Imhof
,
*01 divergens Imhof D. pediforme (Lemm.) Stein.
1.3.4-22 ONS 12/76
- _
. _. . . - . .. __ _ _ _ _ . - _ . . _
Table 1.3.4 6 (Cont.) Page 6 of 9.
*D. sertularia . Ehr.
*D spp.
Epipyxis spp.
** Erkenia subaequiciliata Skuja
*Kephyrion spp.
Lagynion spp.
*Mallomonas acaroides Percy i ~M. allantoides Harris
} **[[alpina Pascher and Ruttner
<
M. caudata Conrad 4 M. elongata var. americana Bourrelly
**M. majorensis Skuj a
. M.,producta Iwaaoff . ,
- M.; pseudocoronata Prescott M.,tonsurata Teiling
*M spp.
}! *0chromonas chromata H. Meyer
- 0. variabilis H. Meyer
*0 spp.
**Pheaster spp.
- Pseudokephyrion latum (Schill.) Schmidle
- P. schilleri Conrad 1 P. spp.
- ** Pteridomonas pulex Penard j Synura adamsii G. M. Smith l' *S. spinosa Korsch.
** S. uvella Ehr.
- S spp.
Class: Haptophyceae
;
*Chrysochromulina parva Lackey Class: Xanthophyceae .
1 *0phiocytium capitatum var. longispinum (Moebius) Lemm. Division: Cryptophyta i Class: Cryptophyceae
- *Chroomonas acuta Utermohl
*C. caudata Geit.
!
**C. coerula (Ceit.) Skuja
**C norstedtii Hansgirg- . = -
' i AC. reflexa Kiss. _ _ . - -
~'
_
*C. spp. .- -~
i L Cryptomonas erosa . Eh r. ~~~~~
'
AC..marsonii~ Skuj a L- 7 ' E E obovata Skuja (C. ovata Eh r. 5C. phaseolus Skuja
*C. reflexa Skuja
'- C spp. ,
ACyanomonas spp. i Division: Cyanophyta Class: .Myxophyceae nAgmenellum quadriduplicatum. (Menegh.). Breb. ] *A. thermale .(Kutz.) Drouet and Daily j Anabaena catenula (Kutz.) Bornet and Flahault n*A. cylindrica Lemm.
'A. levanderi- Lemm.
j[[scheremetievi Elenkin A spp.
.l.3.4-23
. ONS 12/76 g - -,-- -w >-w
,, e .,.---.m4 y- .-, , r-, .s., - ,a e ,-
.
Page 7 of 9 Table 1. 3.4-6 (Cont .)
*Anacystis cyanea Drouet and Daily A. firma (Kutz.) Drouet and Daily
*A. incerta Drouet & Daily
**}}[ montana Drouet & Daily
*S2.spp.
Coccochloris stagnina (Sprengel)
*Cb,spp.
Coelosphaerium kutzingianum Naeg. fb_naegelianum Unger Cylindrospermum spp. Dactylococcopsis acicularis Lemm.
*D. rhaphidioides Hansgirg
*i[[ smithii Chod. & Chod.
Eb.spp.
- Gomphosphaeria lacustris Chod.
Sb.spp. Lyngbya contorta Lemm.
**0. acuminata Gomont
*0scillatoria acutissima Kuff Ob,agardhii Gomont
**Cb, amphibia Agardh Cb,angusta Koppe 03 angustissima West and West
- 0_,., geminata Menegh.
O. limnetica Lemm.
*Cb, tenuis Agardh O_._ spp.
- Phormidium angustissimum West and West P.,spp.
Radiocystis geminata Skuja Division: Euglenophyta Class: Euglenophyceae
- Euglena gracilis Klebs
- E. proxima Dang. _.
.
*Eb,spp. __ _ _.
- - - ' ~
Lepocinclis spp. - Tra chelomona s ab rup ta __ (Swir. ) ~~ Defl.
' _ h acanthostoma (Stokes) Defl.
.
-
T dubia (Swir.) Defl. Jb, intermedia Dang. T. mammillosa Prescott T. pulchella Drez. j[[ pulcherrima Playfair J'. superba (Swir.) Defl. T. volvocina Ehr.
][[volvocinavar. punctata Playfair
*]b.spp.
Division: Pyrrhophyta Class: Dinophyceae Ceratium hirundinella (Mull.) Duj .
*Glenodinium armatum Levander G2 gymnodinium Penard ib_palustre (Lemm.) Schiller
*Cb,pulvisculus (Ehr.) Stein Cb,quadridens (Stein) Schiller
*Cb.spp.
- Gymnodinium spp.
1.3.4-24 ONS 12/76
,
Table 1.3.4-6 (Cont.) Page 8 of 9 Hemidinium nasutum Stein H_:, spp.
- Peridinium aciculiferum (Lemm.) Stein
** P. af ricanum Lemm.
- E cinctum Ehr.
**[;teflandrei Lefevre P. garunense Nygaard
*P2 inconspicuum Lemm.
,
- P. pusillum (Pen.) Lemm.
*P2 wisconsinense Eddy
- P_._ s p p .
l Division: Chloromonadophyta j Class: Chloromonadophyceae ,
- Gonyostomum depressum (Laut.) Lemm.
**G. latum Iwanoff Unknown Species 0374-2-03 i
- 0574-2-02
- 0574-2-03
- 0574-2-04
,
- 0774-2-07
- 0774-2-15 0774-2-16 0774-2-17 0774-2-19
- 0774-2-22
'
- 0774-2-24 _ _ _ _
"
- 0774-2-28 -
0774-2-31 ~ ' _--
~~
- 0774-2-32 _
_ _ - - -
-
'
_ -.0774-2-34~
--
- 0974-2-07 0974-2-20 0974-2-24
- 1074-2-02
- 1074-2-04 1174-2-01
.
- 0175-2-01
- 0275-2-03
- 0675-2-01 0675-2-02 0675-2-05
,
- 0775-2-02 0775-2-03
- 0875-2-03 0975-2-01 1175-2-03
- 1175-2-04 1175-2-05
** 0176-2-01'
** 0176-2-02.
** 0776-2-01
** 0776-2 .
** 0776-2-03 1.3.4-25 ONS 12/76
--
_
--
-- _
_ Page 9 of 9
Table 1.3.4 6 (Cont.). ! '
** 0776-2-04
,
** 0976-2-01
' **0976-2-02 i **0976-2-03 i **0976-2-04 i i i f
.
k 4 ! ! 1
, _ _ - . - - ;
i
! , ; .
J ] ] 1 a
- Observed during the sampling period of January through December,1976
** Observed for the first time during the above sampling period
~ 1.3.4-26 ONS 12/76
. - . _. - ., .. . ., - . . . . . . . .. . -
Page 1 of 2 Table 1.3.4-7 Zooplankton Taxa of Lake Keowee Collected through December 1976 Arthropoda Crustacea Copepoda Calanoida
- Diaptomus mississippiensis Marsh Cyclopoida .
- Cyclops thomasi (Forbes)
- Eucyclops agilis (Koch)
- Eucyclops prionophorus Kiefer
- Mesocyclops edax (Forbes) -
-
- Orthocyclops modestus (Herrick)
Paracyclops cf. fimbriatus poppei (Rehberg)
- Tropocyclops prasinus (Fischer)
Harpacticoida
** Canthocamptus cf. assimilis Kiefer
** Canthocamptus cf. sinuus Coker Cladocera Alona affinis (Leydig)
- Alona gutatta Sars Alona quadrangularis (Mdller)
Alona rectangula Sars
- Alonella acutirostris (Birge)
- Bosmina coregoni Caird Camptocercus rectirostris Schydler
- Ceriodaphnia lacustris Birge
- Ceriodaphnia reticulata (Jurine)
Chydorus piger Sars
- Chydorus sphaericus (Muller)
- Daphnia ambigua Scourfield
- Daphnia laevis Birge
- Daphnia parvula Jordyce Diaphanosoma brachyurum (Liiven)
- Diaphanosoma,leuchtenbergianum Fischer
- Holopedium gibberum Zaddach
- Ilyocryptus spinifer Herrick
- Leptodora kindtii (Focke)
**Leydigia quadrangularis (Leydig)
- Sida crystallina (Muller)
- Simocephalus expinosus (Koch)
Rotifera Asplanchna amphora (Hudson)
- Asplanchna priodonta Ehrenberg Brachionus angularis Gosse
- Brachionus patulus (Muller)
- Chromogaster ovalis (Bergendel)
- Collotheca balatonica Varga
- Collotheca discophora (Skorikov)
- Collotheca libera (Zachairas)
- Collotheca mutabilis Hudson
- Conochiloides coenobasis (Skorikov)
- Conochiloides natans (Seligo)
ONS 12/76 1.3.4-27
_ _ _ - - _ _ ___ _ _ - _ _ _ Page 2 of 2 Table 1.3.4-7 Rottfera (continued)
- Conochilus unicornis Rousselet
- Dipleuchlanis spp.
- Euchlanis spp.
Filinia spp.
- Gastropus stylifer Imhof
- Hexarthra mira (Hudson)
- Kellicottia bostoniensis (Rousselet)
- Keratella americana Carlin
- Keratella cochlearis (Gosse)
- Keratella crassa Ahlstrom
**Keratella earlinae Ahlstrom
- Lecane acronycha Harring and Myers -
**Lecane crepi!a Harring and Myers Lecane depressa (Bryce)
**Lecane flexilis (Cosse)
- Lecane haliclysta Harring and Myers
- Lecane hornemani (Ehrenberg)
Lecane leontina (Turner)
- Lecane luna (Muller)
**Lecane mira (Murray)
- Lecane ploenensis (Voigt)
- Lecane spp.
- Lepadella spp.
- Macrochaetus subquadratus Perty
**Monostyla crenata Harring
- Monostyla lunaris (Ehrenberg)
Monostyla quadridentata Ehrenberg
**Monostyla stenroosi Meissener Monostyla spp.
- Noltholca spp.
- Platyias quadricornis (Ehrenberg)
- Ploesoma hudsoni (Imhof)
- Ploesoma truncatum (Levander)
- Polyarthra euryptera Wierzejski
- Polyarthra dolichoptera (Idelson)
- Polyarthra major Burckhardt
- Polyarthra vulgaris Carlin
- Ptygura libera Myers
- Ptygura spp.
- Synchaeta pectinata Ehrenberg
- Trichocerca capucina Wierz
- Trichocerca chattoni (de Beauchamp)
- Trichocerca cylindrica (Imhof)
- Trichocerca longiseta (Schrank)
- Trichocerca multicrinis (Kellicott)
**Trichocerca platessa (Meyers)
- Trichocerca porcellus (Gosse)
**Trichocerca pusilla (Jennings)
- Trichocerca similis (Wierzej ski)
- Trichocerca stylata (Gosse)
- Trichotria spp.
- Unidentified Bdelloidea
- Unidentified Rotifer
- Observed during this reporting period
**0bserved for the first time during this reporting period ONS 12/76 1.3.4-28
-
- . _ . _ _ ___ m __. ._ __ ___ _ _ _ _ _ . _ . _ _ _ _ . _ _ _ _ _ __ . _ . _ _ . _ - _. .- -
.
I
- Table 1.3.4-8. Summary of the statistical analyses perforsed on 10m to surface zooplankton standing crop (no./1) data follouing tests for normality and homoscedasticity. January through December, 1976.
One-Way ANOVA Results Taxonomic Thermal Data F-Ratio Probability Duncan's Hultiple-Range Category Period
- Transformation df Among Stations a Tests Results (a = 0.05)
Total -Stratified Log 10 (x) 9 18.725 0.001 500, 501>503, 505, 504, 508.5, 508, 509.5 Zooplankton 506>505, 504, 508.5, 508, 509.5 502>504, 508.5, 508, 509.5 503>508.5, 508, 509.5 , 505, 504, 508.5>508, 509.5 Destratified Log 10 (x) 9 3.496 0.002 500>501, 503, 505, 502, 508.5, 504, 508, 509.5 506>508.5, 504, 508, 509.5 2 Total Stratified Log 10 (x) 9 11.429 0.001 501>503, 505, 504, 508.5, 508, 509.5 t Copepoda 501>505, 504, 508.5, 508, 509.5 I' ' 506, 502>504, 508.5, 508, 509.5 La
- 503, 505>508, 509.5 ce- 504, 508.5>509.5 e
C$ Destratified Log 10 (x) 9 2.732 0.01 500>505, 502, 503, 508.5, 504, 509.5, 508 Total Stratified Lot 10 (x) 9 0.898 0.53 Cladocera Destratified Lot 10 (x) 9 0.972 0.47 Total Rotifera Stratified Lot 10 (x) 9 0.466 0.001 506, 500, 501>504, 508.5, 508, 509.5 502, 503, 505, 504, 508.5> 508, 509.5 Destratified Lot 10 (x) 9 3.120 0.005 500>505, 503, 502, 504, 508.5, 508, 509.5 506>504, 508.5, 508
,
- Stratified Period (March through August)
Destratified Period (January, February and September through December) o 2: tn FJ
~~
. %J
@
,
-- - - - - - - _ - - _ . .
Table 1.3.4-9 Percent composition of total zooplankton at reference stations, in the intake canal, in the discharge cove, and at ONS thermal plume stations. Reference Stations Intake Canal Dischaide Cove Plume Stations Thermal Taxonomic (508.5, 504, 505) (500, 501, 506) (509.5) (508) Period Category Stratified
- 40 47 39 Copepoda. 48 31 23 13 Cladocera 10 29 30 48 Rotifera 42 e
,
F . c.
& Destratified**
o 36 34 40 Copepoda 36 27 31 22 Cladocera 15 37 35 38 Rotifera 49
- March through August
** January, February, September through December O.
m 3 6
Distance from Keowee Dam (km) 14 12 10 8 6 4 2 0 2 4 6 8 10 4 3 2 1 0
= = a a > . . . . . . . . . . . . .
4000. 1500. January 13. 1976 6.0 3600 1350.
. 5.5 Ii 3200 1200 -
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- Phytoplankton standing crop parameters measured from selected water sampling stations Lake Keowee, SC, January 13, 1976.
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Distance from Keowee Dam (km) 14 12 10 8 6 4 2 0 2 4 6 8 10 4 3 2 1 0
. . . . . . . . . . . . . . . . . .
4000. 1500. September 14. 1976
. 6.0 3600., 1350-5.5 0 3200 1200 5,o O
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Phytoplankton standing crop parameters measured from selected water sampling stations. Lake Keovee. Q e SC. September 14 1976 1
.
_ _ . _ _ _ _ _ _ _ _ _ _ _ _ . _ _ _ . _ _ _ _ . _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ . _ _ _ _ _ _ _ _
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All values are expressed as a percent of total zooplankton. . 1.3.4-38 ONS 12/76
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1.3.4-39 ONS 12/76
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O i ; . l l [ , , . O - o e o e co to m N o O O 8 O O O OO O SAMPLING STATIONS Figure 1.3.4-14. Total zooplankton density (10 m to surface) among lake sampling stations for thermally stratified and destratified periods of 1976, Lake Keowee, S. C. All values are expressed as antilogarithms of log 10 (x) transformed station means from ANOVA.
.
1.3.4-44 - ONS 12/76 I
,
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SAMPLING ST ATIONC Figure 1.3.4-15. Total copepod density (10 m to surface) among lake sampling stations for thermally stratified and destratified periods of 1976. Lake Keowee, S. C. All values are expressed as antilogarithms of log 10 (x) transformed station means for ANOVA. 1.3.4-45 DNS 12/76 _
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o S8 88 S S S a S Figure 1.3.4-16. Total cladoceran density (10 m to surface) among lake sampling stations for thermally stratified and destratified periods of 1976, Lake Keowee, S. C. All values are expressed as antilogarithms of log 10 (x) transformed station means from ANOVA. 1.3.4-46 ONS 12/~i6
.
,
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.
RIVER KILOMETERS FROM KEOWEE DAM 10.0 , 7.5 5.0 2.,5 0 ,0 2.5 5.0 75 1 10.0 1,2.5 15.0 i . . . , . . . 30 __ - e DESTRATIFIED PERICD 0 - -O STRATIFIED PERIOD - 25 __
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,__ _ _ __ _ _ _ _ _ _ ____ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
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b 8 v d s_ g _ O 502 509.5 508 502 509.5 508 i Figure 1.3.4-18. Total zooplankton and total copepod density (10 m to surface) lakeside of the skimmer wall (502), in the intake canal (509.5), and in the discharge cove (508) during thermally stratified periods of 1976. Values are expressed as antilogarithms of log 10(X) transformed station means from ANOVA. 1.3.4-48 ONS 12/76 l ' _ _ _ ___.___ _. _ . _ __ _ _ _ _._ . . _ _ _ . _ , _ . _ . .
5 . - g 4 . - STRATIFIED DESTRATIFIED Y a $ o. = 3 .. < , 5 8 - g -
.
g2 . .2 h 2 1 - - 0 502 509.5 508 502 509.5 508 20 . . g 15 , , N 3 E ' 10 .. g W S STRATIF IED DESTR ATIFIED o e w J g5 .. R _ 0 502 509.5 508 502 509.5 508 Figure 1.3.4-19. Total cladoceran and total rotifer density (10 m to surface) lakeside of the skimmer wall (502), in the intake canal (509.5), and in the discharge cove (508) during thermally stratified and destratified periods of 1976. Values are expressed as antilogarithms of log 10(X) transformed station means of ANOVA. 1.3.4-49 ONS 12/76
1.3.5 BENTH0S Specification: The benthic macroinvertebrate populations of Lakes Keowee and Hartwell shall be sampled four (4) times per year. Sampling stations shall be located on the lake side of the skimmer wall (502), in the vicinity of the discharge (dis-charge canal and 504), at control stations on Lake Keowee (501 and 506), and in Lake Hartwell below Keowee Dam (604 and 606). Quantitative samples shall be taken with a modified Petersen grab. Qualitative samples (e.g. sweep-netting) shall be done along the shore nearest each of the stations listed above.
.
Benthic organisms collected shall be identified to the genus level where practicable. Diversity indices shall be cal-culated as well as data on standing crop of benthic organisms, s ich as number per square meter and/or grams per square meter (Duke Power Company, 1973a). I. INTRODUCTION A discussion of the value of benthic macroinvertebrates as environmental monitors was presented in the Oconee Nuclear Station Semi-Annual Report for the period ending June 30, 1973 (Duke Power Company, 1973b). II. METHODS AND MATERIALS The methods and materials were the same as described in previous ONS Semi-Annual Reports (Duke Power Company, 1973a and 1975) except as indicated herein. Core sampling was initiated in February to supplement qualitative littoral data. A cylindrical core (diameter: 5.1 cm) was pressed into the substrate to a depth of approximately 5 cm. Three replicate samples were taken at each station. A larger diameter core (12.7 cm) was sub-stituted in May because of the extremely low numbers of organisms collected with the small core in February. III. RESULTS AND DISCUSSION LAKE KE0 WEE: LITTORAL ZONE . Taxonomic Composition and Density Chironomid larvae were the dominant benthic organisms for all seasons in the littoral zone of Lake Keowee, comprising 73% of the benthos collected. Composition of midge fauna.did not vary markedly between stations.(Figure 1.3.5-1). Dominant chironomid larvae in littoral samples were Stictochironemus, Pseudochironomus, and Cryptochironomus. Other organisms occurring frequently included chironomid pupae and ceratopogonid pupae. Ceratopogonids were represented by Dasyhelea and Palpomyia complex. l- 1. 3. 5 -1 ONS 12/76 i i !
,
.- - _
Highest mean density of macroinvertebrates in the littoral zone 2 occurred in August (2,693/m2 ) and minimum occurred in February (366/m ) (Figure 1.3.5-2). Seasonal changes in total abundance were primarily related to changes in the density of chironomid larvae. Density did not fluctuate noticeably between stations in February; however, wide differences did occur between stations during other sampling periods (Figure 1.3.5-3). Standing Crop Seasonal changes in standing crop (biomass) closely paralleled changes in 2 density (Figure 1.3.5-2). Standing 2 crop was highest in August (1,558 mg/m ) and lowest in February (296 mg/m ), . 2 Maximum mean biomass occurred at Station 505 (1,409 mg/m ) and the minimum at Station 502 (378 mg/m2 ). The discharge (Station 508) did not have a noticeably lower biomass during 1976 (Tables 1.3.5-1 and 1.3.5-2). Diversity Seventy-three taxa were collected from the littoral zone in quantitative and qualitative samples (Table 1.3.5-3). Number of taxa ranged from one at Station 502 in February, to 17.at Station 508 in August. Diversity (H) was higher in the littoral zone than profundal zone. SUBLITTORAL AND PROFUNDAL ZONES Taxonomic Composition and Density Chironomidae larvae, Chaoborus larvae, and oligochaetes were the dominant benthic groups in the sublittoral and profundal zones, comprising 89% of the total number of organisms collected. Chironomids were the most diverse group with 23 taxa in three subfamilies. The subfamilies Chironominae and Tanypodinae accounted for 82% and 16%, respectively, of the chironomid fauna. The Orthocladiinae was represented by a single genus, Parakiefferiella, which comprised only 2%. Composition of the chironomid community is shown in Figure 1.3.5-5 Oligochaetes were represented by 6 species in 2 subfamilies, naioidae and Tubificidae. Chironomid larvae were the dominant taxa at all stations except Station 506. Important midges included Polypedilum (Tripodura group), Stictochironomus, Tanytarsus, Pseudochironomus, Micropsectra, and , Procladius bellus. Large numbers of Parakiefferiella were collected at Station 504 in May. Maximum mean density of macroinvertebrates occurred in Lake Keowee 2 in May (931/m2 ) and minimum mean density occurred in August (548/m ) (Figure 1.3.5-6). Chironomid density declined from 422/m2 in bby to 128/m 2 in August, probably indicating a major emergence sometime between May and August. Oligochaete densities fluctuated seasonally, with the highest density _ occurring in August (351/m ).2 Chaobcrus larvae numbers peaked'in 2 November with maximum numbers (866/m ) occurring at the discharge station. 1.3.5-2 .ONS 12/76
I l
.__
i "acroir; vertebrate density varied greatly between stations in all seasons (Figure 1.3.5-7 and 1.3.5-8). Low numbers f macroinvertebrates were collected at the discharge in February, lby, and August (Table 1.3.5-5). Densities were generally high in May with the exception of Station 508 (39/m2 ). Emergence of Chaoborus larvae, which normally occurs in April and May, may account for these low numbers. Densities at the discharge in the fall were higher than at all other stations with the exception of Station 506 which had a high population of oligochaetes. Gammon (1973) found increased populations of macroinvertebrates in areas receiving thermal effluent during the fall, when ambient water temperatures began to decline. . Standing Crop Biomass increased from a low in February (265 mg/m2 ) to a high in November (653 mg/m 2 ) (Figure 1.3.5-6). Chironomid larvae, oligochaetes, and Chaoborus larvae accounted for 89% of the standing crop with each group contributing 45%, 18%, and 26%, respectively. Standing crop of chironomids was highest in May, probably due to increased growth prior to emergence. Maximum biomass of oligochaetes and Chaoborus was recorded in August and November, respectively. Generally, biomass was higher at deep-water (>20 m) stations. High biomass at Station 506 was attributed to large tubific' ids. Although biomass at the discharge station was generally low, the biomass reached 888 mg/m 2 in November and was due to large numbers of Chaoborus larvae. Diversity A total of 45 taxa were collected from dredge samples in Lake Keowee. Station 501 had the most diverse fauna with 29 taxa, while Station 508 had the least variety with 14 taxa. Although oligochaetes were considered as a single group in calculating diversity indices, a qualitative checklist of species was compiled (Tables 1.3.5-4 and 1.3.5-5). Highest diversity occurred at all stations in November with the exception of Station 506. Number of taxa ranged from 3 at Station 508 in May to 16 at Station 501 in November. Station 501 had the highest number of taxa in February (12), May (13), and November (16). Station 505 had the highest number of taxa in August (10). Diversity (H) was generally low at Stations 502, 506, and 508 (Tables 1.3.5-4 and 1.3.5-5). Studies on the effects of heated water on insect fauna have shown sig-nificant reductions in diversity and nuebers of organisms (Coutant 1962; Gammon 1973). However, bottom temperatutes at the discharge were not
. higher than those at other stations; therefore, low diversity, density, and biomass in most seasons were apparently due to unfavorable substrate and scouring rather than to temperature.
1.3.5-3 ONS 12/76
.J
_ _ . LAKE HARTWELL: LITTORAL ZONE Taxonomic Composition and Density Chironomids, oligochaetes, and ceracopogonids were also the dominant organisms in the Lake Hartwell littoral zone (Table 1.3.5-6). Chironomid densities peaked in May, while oligochacte densities were highest in February (Table 1.3.5-6). Ceratopogonid larvae generally occurred in higher numbers in August and November. Chironominae was the dominant subfamily of chironomids in the littoral zone (Table 1.3.5-6), with , Micropsectra and Tanytarsus as the dominant genera. 2 Highest mean density of organisms occurred in May (4208/m ) and lowest in
.
February (1,628/m2 ). Mean densities for Station 604 and 606 were similar (Table 1.3.5-6). Standing Crop 2 Mean standing crop for Station 604 and 606 was 2,610 and 2,680 mg/m , respectively. Standing crop was lower in the littoral zone than sub-littoral zone (Figure 1.3.5-9). ' Diversity Sixty-two taxa were collected in the littoral zone with 50 taxa at Station 604 and 45 taxa at Station 606 (Table 1.3.5-7). Chironomids and oligochaetes were the most diverse groups with 25 and 11 caxa, respectively. SUBLITTORAL ZONE Taxonomic Composition and Density Chironomids, oligochaetes, chaoborids, and ceratopogonids were the dominant groups in the subli'ttoral zone. The Tanypodinae was the dominant subfamily of chironomids (Table 1.3.5-8) with Coelotanypus scapularis the most abundant. Other groups were of minor importance and occurred infrequently (Table 1.3.5-8). 2 Maximum'mean density occurred in November (1,204/m ) and lowest in August 2 2 (446/m ). Station 606 had a mean density of 1,034/m , whereas Station 604 2 had a mean density of 502/m , _ Standing Crop 2 Standing crop was high in February (32,043 mg/m2 ) and May (41,091 og/m ), The Asiatic clam, Corbicula manilensis, occurred in low numbers at Station 604 but contributed marke , to the standing crop of Lake 2 Hartwell. Minimum standing crop was observed in August (350 mg/m ), Diversity Forty-six taxa of macroinvertebrates were collected in the'sublittoral zone of Lake Hartwell. Total taxa did not fluctuate noticeablysby season or 1.3.5-4 ONS 12/76
,
, station. Highest number of taxa was recorded at Station 606 in August (16) and lowest number of taxa from Station 604 in August (7). Station 606 had a more diverse fauna than Station 604. Chironomids were the most diverse group with 23 taxa. IV.
SUMMARY
AND CONCLUSIONS Benthic macroinvertebrates of Lakes Keowee and Hartwell were sampled in accordance with Technical Specifications for ONS in 1976. As in past reports, chironomids, oligochaetes, chaoborids, and ceratopogo-nids were the dominant benthic groups in Lakes Keowee and Hartwell. Diversity increased from deep waters to shallow waters with chironomids - being the most diverse group in both lakes. Generally, profundal benthos at Station 508 (discharge station) had reduced density, biomass, and diversity when compared to other stations. Unsuitable substrate and scouring at this otation, rather than temperature, appear to be the limiting factors. Littoral benthic populations at the discharge were not similarly affected and had high numbers, biomass, and diversity throughout most of the year. Furthermore, no adverse effects from the ONS discharge were noted at Station 504. Literature Cited Coutant, C. C. 1962. The effects of heated water effluent upon the macro-invertebrate riffle fauna of the Delaware River. Proc. Penn. Acad. Sci. 37:58-71. Duke Power Company. 1973a. Appendix B to Operating License Nos. DPR-38, DPR-47, and DPR-55, Technical Specifications for the Oconee Nuclear Station Units 1, 2, and 3, Duke Power Company. U. S. Atomic Energy Commission, Docket Nos. 50-269, 50-270, and 50-287 (revised August 1, 1975 WRC) Washington, D. C.
. 1973b. Oconee Nuclear Station. Semi-Annual Report. 1 Period Ending June 30, 1973. '
. 1975. Oconee Nuclear' Station. Semi-Annual Report, Period Ending December 31, 1975.
Gammon, J. R. 1973. The effects of thermal imputs on the populations of fish and macroinvertebrates in the Wabash River. Purdue Univ. Water Res. Research Ctr. West Lafayette, Ind. .106 p. l l 1.3.5-5 ONS 12/76
Table 1.3.5-1 2 Density (mean No/m ) of Benthic Macroinvertebrates Collected with a Core Sampler in 1.ake Keowee in 1976. STATIONS 501 502 504 TAXA Sample Period Feb May Aug Nov Feb May Aug Nov Feb May Aug Nov Prostoma sp. 147 26 79 132 Nematoda 26 26 26 Ilirudinea 53 011gochaeta 26 237 658 26 79 26 ilydrachnellae 26 26 Collembola 73 Siphlonurinae 26 Didymops sp. 26 Statis sp. 26 Polycentropus sp. 53 occetis sp. 26 53 Chaoborus sp. (larvae) 26 Chironomidae (pupae) 53 26 H Cryptochironomus sp. 26 26 105 26 447
- Dicrotendipes sp. 26 73
- P.naciadopelnu sp. 26
, s Crypte.cladopelma sp. 53
- IElyis$~dilum (Nubeculosua group) 26 Polypedilum (Tripodura group) . 184 210 26 53 26 26 79 Pseudochironomus sp. 53 210 Stictochironomus sp. 73 79 842 1631 220 1578 73 26 548 1315 Pagastiella sp. 26 cladotanytarsa sp. 53 73 t
Micropsectra sp. 342 stempellina sp. 105 53 237 Tanytarsus sp. 73 53 Ahlabesmyia mallochi 26 Ahlabenmyia ornata 53 Ablabesmyia aspera 53 53 Procladius bellus 473 26 79 Parakiefferiella sp. 158 26 79 Psectrocladius sp. 26 53 Palpomyia complex (Palpomyia sp. Bezzia sp., Probezzia sp., Johannsenomyia sp.) Dasyhelea sp. 73 26 53 1973 79
@
en N O e
- _ _
_ _ . . _
~ _ . -
Table 1.3.5-1 (Continued) Density (mean No/a ) of Benthic Macroinvertebrates Collected with a Core Sampler in Lake Keowee in 1976. STATIONS 501 502 504 TAXA Sample Period Feb Hay Aug Nov Feb Hay Aug Nov Feb Hay Aug Nov Total Taxa 4 11 9 11 1 5 15 2 4 9 12 4 Heannumberorgangsas/n 366 736 2051 4734 220 499 2580 52 292 287 2263 1630 Wet weight (ag)/m - 426 752 1328 610 81 355 1068 8 88 736 1031 284 Botton Temperature (*C) 9.5 20.5 28.6 18.0 11.5 20.7 28.5 18.5 15.0 19.6 28.3 20.0 . F Y'
~
l
. .
4 O C 23 , cn e
_ Table 1.3.5-2 Core Sampler in Lake Keowee in 1976. 2 Density (mean No/m ) of Benthic Macroinvertebrates Collected with a 508 506 _ Nov 505 May Aug _ _ Aug Nov Feb STATIONS Feb_ _ Mag _ Aug "Nov Feb May Sample Period TAXA 26 53 26 79 79 53 26 342 Prostoma.sp. 26 289 26 Nematoda 1552 500 26 26 26 26 011gochaeta Hydrachnellae 294 26 26 Collembola ' 26 26 26 Hexagenia sp. Polycentropus sp. 26 26 147 73 132 Decetis sp. 26 105 26 chaoborus sp. (larvae) 210 26 210 Chironomidae (larvae) 342 158 105 237 26 53 Chironomidae (pupae) 263 53 105 105 53 Chironomus_ sp. 316 158 ra Cryptochironomus_ sp. 132
- c, plerotendipes sp. 53 526
,
Glyptotendipes sp. 184 105
- Par.achironomus sp. 26 263 0" Cryptociadopelma_ sp. 79 53 26 53 1657 islypedilum (Nubeculosum group) 395 626 26 53 184 421 1657 132 26 Polypedilum (Tripodura group) 53 2235 294 26 736 684 26 Pseudochironomus sp. 395 26 220 316
~Stietochironomus sp. 79 316 53 53 53 Cladotanytarsus_ sp. 26 73 132 289 132 158 Ilicropsectra. sp. 158 263 26 289 Stempc111na- . 763 26 53 53
_anytarsus T sp. 263 26 105 Ablabesmyia mallochi- 53 158 26 53 53 Coelotanypus scapularis _ 26 263 Procladius bellus_ 79 Parakiefferiella sp. O m N
- 2 w .
_ - . . _ _ . - - _ -
., _ - . _ . _ - - - - .
.
Table 1.3.5-2 (Continued) Density (mean ho/m ) of Benthic Macroinvertebrates Collected with a Core Sampler in Lake Keowee in 1976. STATIONS 505 506 508 TAXA ' Sample Period M M Aug Feb M A3 M Now Nov Feb M M Psectrocladius sp. 921 53 Ceratopogonidae (larvae)' 73 Palpomyia complex (Palpomyia sp. 26 26 26 132 26 Bezzia sp., Probezzia sp., i Johannsenomyia sp.) Dasyhelea sp. 73 53 73 105 Total Taxa 5 16 12 9 2 14 16 9 2 13 17 6 2 Mean number organisms /n 733 5685 4718 394 367 1445 2262 1235 220 1150 2289 3683 Wet weight (ag)/m2 807 1510 3119 202 176 252 1184 957 198 558 1617 368 Botton Temperature ('C) 1].5 20.2 28.5 20.0 1; 6 *a.1 28.6 20.0 18.5 19.4 28.2 20.0 w LJ 5F e
-
i m W 3
.
Table 1.3.5-3 Checklist of Benthic Macroinvertebrates Collected in the Littoral Zone of Lake Keowee, 1976. , 501 502 504 505 506 508 Taxa S Hydra sp. C C S C,5 C,S S Prostoma sp. C,5 C C,5 S C C,S Fematoda C liirudinea C,5 C,S C,S C,5 C,S ' Oligochaeta C,5 S S Nais variabilis C
~
gis pristina C S C Nais communis S S S Stylaria fossularis S S Stylaria lacustris C,S S CS C,S . C.S C Tubificidae Peloscolex sp. C C S C S Limnodrilus sp. C Limnedrilus hoffmeisteri C,S Aulodrilus limnobius S Bothrioneum vejdovskenum C C C C C C,S Hydrachnellae C C S C Collembola C C S C isotoma sp. S Gyraulus sp. Sialis sp. C,S S Ephemeroptera C Siphlonurinae C,S l!exagenia sp. S Centroptilum sp. S Caenis sp. S C C,5 C,5 Polycentropus sp. C,S C C,S S C,5 Decetis sp. S 0xeythira sp. S Coenagrionidae S Argia sp. Gomphus sp. C Didymops sp. C S Periodidae C C C S S Chaoborus (larvae) S Chaoborus (pupae) _ C,S C,5 C,S C,5 C,S Chironomidae (pupae) S S C C Chironocidae (larvac) C C,5 S Chironomus sp. C C C,S C,S C,5 C,S Cryctochironomus spp. C,5 C,S C Cryptocladopelrut sp. C,S C S C,S C Dicrotendipes spp. C Glyptetendipes sp. S Harnischia sp. Paraciadopelma sp. C C Parachirenomus sp. 1.3.5-10' -ONS 12/76
i Table 1.3.5-3 (Cont.) Checklist of Benthic Macroinvertebrates Collected in the Littoral Zone of Lake Keowee,1976. Taxa 501 502 504 505 506 508 Polypedilum sp. S Polypedilum (Nubeculosum) grp. S S C,S C S S Polypedilum (Tripodura) grp. C C C,S C C,S C Pseudochironomus sp. C,S CS C,S C,S C,5 Stictochironomus sp. C,S C,S C,S C,S C,5 C,S Stenochironomus sp. S S Pagastiella sp.
'
C,5 S Cladotanytarsus sp. - C C C C , Micropsectra sp. S C,S C,S C,S C,S Stempellina sp. C C C,S C,S C,S C,S Tanytarsus sp. C C C.S C C.S Ablabesmyia mallochi C C C Ablabesmyia ornata C C S S Ablabesmyia aspera C,S C,S S Coelotanypus tricolor C Coelotanypus scapularis S Coelotanypus sp. S Procladius sp. S Procladius bellus C C C,S C,S C Procladius (Procladius) S Cricotopus sp. S S Parakiefferiella sp. C C,S C C,S C,5 C Psectrocladius sp. C,S C,S C,5 C,S S Ceratopogonidae (larvae) C Palpomyia Complex C,S C,S C,S C,S C,S C,S Palpomyia Complex (pupae) S S Dasyhelea sp. C,S C C C,S Total Taxa 39 30 29 41 30 42 C = Core S = Sweep Net
.
1.3.5-11 ONS 12/76 l
.
_ _ _ - _ _ _ _ - _ _ _ _ _ _ - - _ _ _ __ Table 1.3.5-4 Density (No/a ) of Benthic Macroinvertebrates Collected with a Hodified Petersen Grab in Lake Keowee in 1976. 502 504 STATIONS 501 Aug Nov Feb_ May Aug Nov
'
May Aug Nov Feb Hay TAXA Sample Period Feb._ 13 26 Prostoma sp. 52 142 90 129 26 39 401 011gochaeta P P Nais variabilis P
-Aulophorus sp. P P P
Tubificidae P Ilydrilus templetoni P Limncfrilus sp. 13 13 liydrachnellae 13 Polycentropus sp. 65 13 39 Decetis sp. 65 103 90 103 Chaoborus punctlpennis (larvae) 245 142 39 39 13 Chaoborus punctipennis (pupae) 13 26 Chironomidae (larvae) 13 13 13 13 Chironomidae (pupae) 13 26 r Chironomus_ sp. 39 13 65 52
- w m ptochironomus sp. 13
. Cryptocladopelma sp. 26 Y Dicrotendipes sp. 26 llarnischia sp. 129 [ Lauterborniella sp. 13 116 65 65 13 13 Pacantiella sp. 52 Paraciadopelm.s sp. 26 13 Polypediluti (Kubeculosua group) 323 13 26 103 310 78 181 Polypedilum (Tripodura group) 52 1667 52 78 39 65 Pseudochironomus sp. 26 78 65 13 13 90 sticrochironomus sp. 78 336 Cladotanytarsus sp. 90 26 103 13 26 13 Micropscctra sp. 13 26 13 13 Sccmpellina sp. 13 26 1059 26 26
'lanytarsus sp.
Ablabesmyia mallochi 26 Ablabesmyia ornata 65 Coelotanypus concinnus 52 O un C 0
.
_
.
Table 1.3.5-4 (Continued) Density (No/a)ofBenthicMacroinvertebrate!n196. Lake Keovee Col ected with a Modified Petersen Grab in STATIONS 501 502 504 Taxa Sample Period Feb Hay Aug Nov Feb May Aug Nov Feb May Aug Nov Coelotanypus scapularis 103 26 13 26 Procladius bellus 129 65 52 13 13 13 13 Procladius (Procladius) 13 Parakiefferiella sp. 13 207 52 Palpomyia complex (Palpomyia sp., 39 116 26 39 65 52 Bezzia sp., Probezzia sp., Johannsenomyia sp.) Bezzia (pupa) 13 Total Taxa 12 13 6 16 6 6 7 11 8 10 4 11 ! Meannumberorgar.jsma/m 1950 2754 285 558 427 466 234 375 465 854 182 648 Wet weight (ag)/m 643 654 289 84 156 824 133 123 114 191 96 127 H =,(Diversity) 1.62 1.52 1.400 2.59 0.92 0.63 1.77 1.84 1.92 1.73 1.10 2.13 R = (Redundancy) 0.43 0.47 0.44 0.15 0.78 1.00 0.25 0.58 0.13 0.30 0.45 0.19 Botton Temperature ('C) 9.5 19.0 25 17 9.5 14.5 16.5 18.0 12.5 19.5 25.5 20.0* P = Presence
."
Y' C
. .
m tJ b.
.
4
. _ _ _ _ _ _ _ _ _ __ _ _ _ _ _ _ _ _ _ _ _
___ Table 1.3.5-5 Density (mean No/a ) of Benthic Macroinvertebrates Collected with a Modified Petersen Grab in Lake Keovee in 1976. 505 506 308 STATIONS Feb May Aug Nov Feb May Aug Nov TAXA Sample Period Feb May Aug Nov 52 Nematoda Polychaeta 13 26 388 762 1990 1214 13 Oligochaeta
'Naididae P P
Nais variabilis P Aulophorus borelli P P P Tubificidae P Ilydrilus templeton1 P P Limnodrilus sp. P Tubtfex tubifex Hydrachnellae 13 Leptoceridae 13 13 Decetis sp. 26 866 78 65 129 258 26 65 Chaoborus sp. (larvae) 13 13 13 7 Chaoborus sp. (pupae) 13 u Chironomidae (larvae) 13 13 'u Chironomidae (pupae) 13 13 8 Chironombs sp. 13 13 13 26 $ Cryptochironomus sp. Cryptocladopelma sp. 39 Lauterborniella sp. 13 26 26 13 Parastiella sp. 26 181 26 Paracladopelma sp. 13 181 65 90 52 39 39 52 Polypedilum (Tripodura group) 155 39 Pseudochironomus sp. 13 13 13 13 13 13 13 Stictochironomus sp. 26 13 Cladotanytarsus sp. 13 39 Micropsectra sp. 13 13 Stempellina sp. 13 26 Tanytarsus sp. 13 13 13 13 13 Ablabesmyia mallochi 13 13 26 39 26 90 13 13 13 Procladius bellus 78 Procladius (Procladius) 13 Palpomyia complex (Palponyla sp., 26 13 P y Bezzia sp., Probczzia sp., Cn Johannsenomyia sp.) U 3m . O
-
-_ - __ _
Table 1.3.5-5 (Continued) Density (near. No/a ) of Benthic Macroinvertebrates Collected with a Modified Petersen Grab in Lake Keowee in 1976. STATIONS 505 506 508 TAXA Sample Period Feb May Aug Nov Feb May Aug Nov Feb May Aug _Nov Total Taxa 9 9 10 Il 7 7 7 4 4 3 5 6 Mean number organisms /n 311 466 325 298 815 879 2107 1498 130 39 143 931 Wet weight (ag)/m2 93 122 212 264 525 495 2416 2433 61 31 115 888 H = (Diversity) 1.71 1.49 2.09 2.07 1.57 0.61 0.31 0.55 1.28 1.10 1.37 0.36 R = (Redundancy) 0.57 0.59 0.24 0.46 0.26 0.90 0.95 0.67 0.24 0.00 0.54 1.00 Botton Temperature (*C) 12.5 17.0 25.5 20.0 10.6 12.5 19.0 18.0 12.5 16.0 21.5 19.0 P = Presence Y " . Y 0; O N-C 3
.
- _ _ _ _ _ _ _ _ _ . _ , _ - - - _ . __ _ _. .. _ . - _- .- . . - -
Table 1.3.5-6 Density (mean No/m ) of Benthic Macroinvertebrates Collected with a Core Sampler in Lake llartwell in 1976. 604 606 STATIONS Nov Feb Hay Aug Nov Sample Period Feb Hay Aug Taxa P P P P P- P Pectinatella magnifica Prostoma sp. 184 53 26 73 53 Nematoda 53 Hirudinea 815 587 2499 1657 631 011gochaeta 3817 552 789 . Pelecypoda 26 26 Corbicula manilensis 26 Hydroptilidae (pupae) 26 79 53 Decetis sp. 26
- r. Comphus sp. 26
- w Stalis sp. 26
- n Chironomidae (larvae) 26 316 26 Chironomidae (pupae) 447
- d. 26
- Chironomus sp. 184 73 26 Cryptochironomus sp. 26 26 132 Dicrotendipes sp. 53 552 Cryptotendipes sp. 53 105 26 Cryptocladopelma sp.
Polypedilum (Tripodura group) 53 26 26 Stictochironomus sp. 147 Phaenopsectra (Tribelos) sp. 73 Pagastiella sp.. 53 73 447 26 Micropsectra sp. 1525 105 369 237 Tanytarsus sp. 815 Ablabesmyia aspera 158 53 Ablabesmyia mallochi 132 o Ablabesmyia ornata 53 E Coelotanypus sp. '
.Coelotanypus tricolor 53
$
.
a 4.- - -R- -
._
Table 1.3.5-6 (Continued) Density (mean No/m ) of Benthic Macroinvertebrates Collected with a Core Sampler in Lake llartwell in 1976. ' STATIONS 604 606 Sample Period Feb May Aug Nov Feb May Aug Nov Taxa Procladius bellus 73 105 105 289 Tanypus sp. 26 Cricotopus sp. 53 26 105 Parakiefferiella sp. . 368 79 . 26 53 Psectrocladius sp. 79 79 Smittia sp. 73 Ceratopogonidae (larvae) 26 Palpomyia Complex (Palpomyia) 184 184 220 158 421 473 Dasyhelea sp. 26 26 F liydrophoem-' sp.
~
-
26 p2 Y Total Ta:w 9 5 11 16 9 7 15 15 11
-tl Mean Numb'e 4:n9.'nisms/m' 4110 4101 1947 1787 1125 4315 2734 1788 Wet weigL ,.5 1/*? 1820 1675 6585 360 279 6622 1723 2096
. Bo t tom Tcmper at ers ( *C) 13.8 21.0 28.5 20.0 12.8 21.0 28.0 20.0 P = Presence O
m N 3. a .
.
G _ - _ _ _ _ _ . . _ _ - - . - _ _ - ___
Table 1.3.5-7 Checklist of Benthic Macroinvertebrates Collected in the Littoral Zone of Lake Hartwell, 1976. Taxa 604 606 Pectinatella magnifica C,S C Prostoma sp. C,S S Nematoda C,S C,5 C S Hirudinea C,S C,S Oligochaeta S C,S Lumbriculidae , Lumbriculus varigatus C S Naididae C,S C,S Nais variabilis Dero sp. C S S Stylaria fossularis Aulophorus vagus C,S C,S Tubificidae C,S C Limnodrilus sp. C C S Aulodrilus limnobius Bothrioneum vejdovskyenum C,S C,S Pelecypoda C,S Corbicula manilensis C,S Isotoma sp. S S
- Hydrachnellae
' Hydroptilidae (pupae) C 0xeythira sp. S S Polycentropus sp. S Oecetis sp. C,S C,S S Centroptilum sp. Gomphus sp. C Macromia sp. S Sialis sp. S C Periodidae S Chaoborus punctipennis S Chironomidae (larvac) C Chironomidae (pupae) C,S C,S Chironomus sp. C,S C,S Cryptochfronomus sp. S C Dicrotendipes sp. C,S C Cryptotendipes sp. C Cryptocladopelma sp. C C Polypedilum (Tripodura) grp. C,S S Polypedilum (Nubeculosum) grp. S Stictochironcmus sp. C,S C Phaenopsectra (Tribelos) C Pegastiella sp. C,S Micropsectra sp. C C,S Tanytarsus sp. C,5 C,S Stempellina sp. E S Ablabestyia aspera C,S 1.3.5-18 ONS 12/76
.
i Table 1.3.5-7 (Cont.) Checklist of Benthic Macroinvertebrates Collected in the Littoral Zone of Lake Hartwell, 1976. Taxa 604 606 Ablabesmyia mallochi C Ablabesmyia ornata S C,S Coelotanypus sp. C Coelotanypus tricolor C Procladius bellus C,5 C,S Tanypus sp. C,S Orthocladiinae S - , Parakiefferiella sp. C C,S Esectrocladius sp. S C,S Cricotopus sp. S C,S Smittia sp. C Ceratopogonidae (larvae) C Ceratopogonidae (pupae) C Palpomyia Complex (Palpomyia sp. C,S C,S Bezzia sp., Probezzia sp., Johannsenomyia sp.) Dasyhelea sp. C C Hydrophorus sp. S C,5 Total Taxa 50 45 C = Core S = Sweep Net
.
1.3.5-19 ONS 12/76 l l
.
. - -- . _. .
'
.
Table 1.3.5-8 Density (mean No/m ) of Benthic Macroinvertebrates Collected with a Modified Petersen Grab in Lake Hartwell in 1976. STATIONS 604 006 Ng Feb May A3 Nov Sample Period Feb May A3 Taxa P P P P Pectinatella magnifica P P 26 78 13 Prostoma sp. 13 13 13 Nematoda 788 39 13 52 116 181 297 011gochaeta P Nais variabilis P Stylaria fossularis P P P Tubtficidae P Limnodrilus hoffmeisteri P Aulodrilus limnobius P P s Aulodrilus piquetti P P
'w Bothrioneum vejdovskyenum
'
13 13 26 129 u Pelecypoda 13
.b Corbicula manilensis 13 116 13 Ephemeroptera. 13 13 13 Hexagenia sp.
13 Comphus sp. 13 Phylocentropus sp. 13 26 26 Decetis sp. 13 142 724 26 52 Chaoborus sp. (larvae) 13 13 Chironomidae (larvae) 258 Chironomidae (pupae) 13 39 Chironomus sp. 13 26 26 Cryptochironomus sp. 26 Cryptocladopelma sp. 13 39 13 13 Dicrotendipes sp. Glyptotendipes sp. 13 o 13 z Harnischia sp.
*[~Pagastiellasp.
- 13 e
a
.
4
..
i '
. _ _
Table 1.3.5-8 (Continued) ' Density (mean No/m ) of Benthic Macroinvertebrates Collected with a Modifed Petersen Grab in Lake Hartwell in 1976. STATIONS 604 606 Sample Period Feb May Aug Nov Feb May Aug Nov Taxa Polypedilum'(Tripodura group) 13 13 l Pseudochironomus sp. 26 13 65 l Stictochironomus sp. 13 l Cladotanytarsus sp. 39 Micropsectra sp. 39 Tanytarsus sp. 13 Ablabesmyia sp. 13 Ablabesmyia mallochi 26 13 Ablabesmyia ornata 116 l coelotanypus sp. 13 l 7' Coelotanypus scapularis 155 78 168 39 78 13 F Coelotanypus tricolor 39 26 Y Procladius bellus 39 13 26 If Procladius (Procladius) 13 13 Cricotopus sp. 13 103 13 Psectrocladius sp. 26 568 Palpomyia complex (Palpomyia, 13 13 65 258 39 13 297 Bezzia sp., Probezzia sp., Johannsenomyia sp.) Total Taxa 2 11 12 7 10 13 12 16 14 Meannumberorgangsms/m 337 298 272 1100 737 1434 661 1306 Wet weight (mg)/m 61,437 83,020 292 1063 2650 783 408 2313 Ti 1.90 2.13 1.40 1.25 2.00 1.88 2.05 1.35 R 0.57 0.48 0.62 0.60 0.37 0.32 0.53 0.66 Bottom Temperature (*C) 13.5 19.0 28.0 20.0 12.8 19.0 27.0 20.0 O m l [ P = Presence D a
- .
, ! .
____ . _ _ - . . ._ . . _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ , Chironominae Orthocladiinae ___ , Tanypodinae 2 Chironomidae (Unidentified) _ _ 100 - 'emma
-
g-
- _LLL 90 -
___ m l 80 - l 70 - 60 -
..
50 - 40 - 30 - j 20 - 10 - 5 01 502 508 504 505 506 l l I Figure 1.3.5-1. Mean Percent Composition of Chironomidae Subfamilies l in Lake Keowee Littoral Zones in 1976. 1.3.5-22 ONS 12/76
_- __- ._ __ __ - - _ ___ . _ _ _ _ _ l ! ! 10000-
-
Density (No/m ) Standing Crop (ma/m )
-
-
-
1000 -
_ _ _ _ _ 100 - ^
~_
i _ _ _ _ _ FEB MAY AUG NOV l Figure 1.3.5-2. Mean Density (No/m ) and Standing Crop (mg/m ) of Benthic Invertebrates in Lake Keowee Littoral Zones, 1976. 1.3.5-23 ONS 12/76
,
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Figure 1.3.5-4. Density (No/m ) and Standing Crop (mg/m ) of Benthic Macroinvertebrates in
] Lake Keowee Littoral Zones in August and November, 1976.
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. . _
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.
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506 l Sb! 502 508 504 505 l Figure 1.3.5-5. Mean Percent Composition of Chironomidae Subfamilies in Lake Keowee Sublittoral and Profundal Zones in 1976. I 1.3.5-26 ONS 12/76 i
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l _ FEB MAY AUG NOV
j ' Figure 1.3.5-6. Mean density (No/m ) and Standing Crop (mg/m ) of Ben.nic Invertebrates in Lake Keowee Sublittoral and Profunda 1 Zones, 1976. l 1.3.5-27 ONS 12/76 l l
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__ _. _ . _ - . . - _ . .. .-, -.
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-
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1.4 FISH IMPINGEMENT ON INTAKE SCREENS AND ENTRAINMENT OF FISH EGGS AND LARVAE Specification: A. A detailed analysis of fish impinged upon the intake screens of the Oconee Nuclear Station shall be con-ducted by species, size and number and weight each time one or more intake screens are pulled due to reduced pumping efficiency of the associated con-denser cooling water pumps. Quarterly, an inspection of six intake screens (two from each unit) will be performed. The screens to be inspected will be ' - cleaned one week prior to inspection so that the rate of fish impingement during the week can be determined. A detailed analysis of the fish impinged shall be conducted by species, size and number and weight. The data collected fram these inspections will be recorded in tabular form (Duke Power Company, 1973a). I. INTRODUCTION Fish impingement at Oconee Nuclear Station has been discussed in the Oconee Nuclear Station Semi-Annual Report for the period ending June 30, 1973 (Duke Power Company, 1973b). II. METHODS AND MATELIALS Weekly inspection of intake screens ' Weekly visual inspections for evidence of fish impingement from the intake structure were conducted from January 6 through April 29 when a change in the Technical Spec _lications, Appendix B, on April 9 deleted this requirement. Underwater visual inspection At Oconee Nuclear Station, representative screens were being inspected quarterly using SCUBA by certified divers from the Duke Power Company Environmental Sciences Unit. A change in the Oconee Nuclear Station Technical Specifications, Appendix B, deleted this requirement April 9. One inspection was made on March 30, 1976. All fish observed were counted, lengths estimated, and each fish identified to species when possible. Inspection of screens after being pulled When debris accumulates on the intake screens to the point that pumping efficiency is reduced the screens are removed and cleaned. Each tLae a screen is removed station biologists inspect the screens for fish impingement. Impinged fish are identified, counted, lengths estimated, and degree of decomposition determined. 1.4-1 ONS 12/76
..
As reported in the previous report (Duke Power Company,1975b) a quarterly screen inspection was initiated to quantitatively assess fish impingement at Oconee Nuclear Station on a seasonal basis. A change in the Technical Specifications, Appendix B on April 9, 1976, made these inspections a requirement. Represen-tative screens (LAl, lA2, 2A1, 2A2, 3Al, and 3A2) were pulled, cleaned and replaced and the associated randenser Cooling Water (CCW) pumps were operated for a one iaek period. At the end of the week the same screens were e ,ain pulled and the impinged fish are counted, identified to species when possible, weighed, lengths are estimated, and degree of decomposition determined. This gives an impingement rate over a specified time period with constant CCW pump operation.
.
III. RESULTS AND DISCUSSION Weekly visual inspection of screens Seventeen inspections were conducted from January 6 to April 29, 1976. During this period a total of 143 fish, all threadfin shad, (Dorosoma petenense), were observed (Table 1.4-1). Underwater visual inspection One inspection was conducted on March 30, 1976. A total of 9939 fish was observed impinged on the six representative screens in-spected (Table 1.4-2). Four species of fish were found impinged. The species and numbers were: threadfin shad, 4014; yellow perch, (Perca flavescens), 913; black crappie, (Pomoxis nigromaculatus),1; and 1 unidentifiable chub. Of the total numbers impinged, 5010 fish were unidentifiable due to decomposition. No live fish were seen impinged on the screens or swimming in front of the intake screens. Inspection of screens after being pulled During 1976, a total of seventy-eight CCW intake screens were pulled due to reduced pumping efficiency of the associated CCW pumps. A total of 112,505 fish was impinged. Species, numbers, and percent abundance of identifiable fish impinged were: threadfin shad, 50,082, 96.6%; yellow perch, 1703, 3.3%; and bluegill, (Lepomis macrochirus), 70, 0.1%. A total of 60,650 fish, 53.9% of the total fish impinged, were unidentifiable. A detailed summary of data for the above screen inspections is presented in Table 1.4-3. On February 19 the first quarterly screen inspection was conducted. A total of 6547 fish was impinged (Table 1.4-3). Species, numbers and percent abundance of identifiable impinged fish were: threadfin shad, 4885, 91.0%; yellow perch, 480, 8.9%; bluegill, 5, 0.1%. A total of 1177 fish, 17.2% of the total fish impinged, were uniden-tifiable. The 6547 fish weighed 23.78 kg for an average of 3.6 g per fish. The length frequencies of impinged fish were: 2-4 cm - 1562, 23.9%; 4-6 cm - 3,185, 48.6%, 6-8 an - 1795, 27.4%; and 8-10 cm - 5. 0.1%. 1.4-2 ONS 12/76
. _ _ _ - _ - - _ _ - _ _
!
.
!
On June 25 the second screen inspection was conducted. A total of 739 fish was impinged (Table 1.4-3). Species, numbers and percent abundance of identifiable impinged fish were: bluegill, 128, 68.8%; and yellow perch, 58, 31'.2%. A total of 553, 74.8% of the total impinged fish were unidentifiable. The 739 fish weighed 5.32 kg for an average of 7.2 g per fish. The length frequencies of impinged fish were: 4-6 cm - 427, 57.8%; 6-8 cm - 311, 42.1%; and 10 cm and larger - 1, 0.1%. On September 17 the third screen inspection was conducted. A total of 71 fish was impinged (Table 1.4-3). Species, numbers, and percent abundance of identifiable impinged fish were: bluegill, . 17, 89.5%; and threadfin shad, 2, 10.5%. A total of 52 fish, 73.2% of the total fish impinged, were unidentifiable. The 71 fish weighed 0.34 kg for an average of 4.8 g per fish. The length frequencies of impinged fish were: 2-4 cm - 1, 1.4%; 4-6 cm - 69, 97.2%; and 10 cm and larger - 1, 1.4%. On December 8 the fourth screen inspection was conducted. A total of 3614 fish was impinged. Species, number and percent abundance of identifiable fish were: threadfin shad, 3551, 99.1%; yellow perch, 31, 0.8%; and bluegill, 2, 0.1%. A total of 30 fish, 0.8% of the total fish impinged were unidentifiable. The 3614 fish weighed 10.81 kg for an average of 3.0 g per fish. The length frequencies were: 4-6 cm - 3582, 99.1%; 6 7 cm - 2, 0.1%; and 8-10 cm - 30, 0.8%. IV.
SUMMARY
AND CONCLUSIONS The number of fish observed in the weekly visual inspection and the fact that all fish observed were threadfin shad is the result of the low temperature in the intake canal. Fish were observed only in January, February, and early March. The one SCUBA screen inspection carried out on March 30 showed a majority
.
of the fish impinged were threadfin shad (81.4% of identifiable impinted , fish). The low water temperature in the intake, common for this time of l year, explains the high numbers of fish observed during the inspection (Figure 1.1-1). l The numbers, species, and sizes of fish impinged during the 1976 reporting period, compared with impingement data for 1974 (Duke Power Company,1974a,1974b) and 1975 (Duke Power Company,1975a, 1975b), show a seasonal impingement trend in both numbers and l species. The summer and fall inspections indicate low impingement I rates with bluegill and yellow perch being the dominant species impinged. From late fall to late spring, when the intake water temperatures were low, threadfin shad were impinged in large numbers ! due to their susceptibility to low water temperatures (Parsons and Kimsey ! ' 1954; Strawn, 1965). For the quarterly screen inspections, the most common size group impinged was 4-6 cm (66.2% of the total fish impinged).
.
1.4-3 ONS 12/76
The numbers, kinds, and sizes of fish impinged on the intake screens at Oconee Nuclear Station are not considered to have been detrimental to the fishery resource of Lake Keowee. LITERATURE CITED Duke Power Company. 1973a. Appendix B to Facility Operating License Nos. DPR-38, DPR-47, and DPR-55, Technical Specifications for the Oconee Nuclear Station Units.1, 2, and 3, Duke Power Company, U. S. Atomic Energy Commission, Docket Nos. 50-269, 50-270, and 50- - 287 (revised April 9,1976, NRC), Washington, D. C. Duke Power Company. 1973b. Oconee Nuclear Station. Semi-Annual Report. Period Ending June 30, 1973.
. 1974a. Oconee Nuclear Station. Semi-Annual Report. Period Ending June 30, 1974.
. 1974b. Oconee Nuclear Station. Semi-Annual Report. Period Ending December 31, 1974.
. 1975a. Oconee Nuclear Station. Semi-Annual Report. Period Ending June 30, 1975.
. 1975b. Oconee Nuclear Station. Semi-Annual Report. Period Ending December 31, 1975.
Parsons, J. W. and J. B. Kimsey. 1954. A rep 6rt on the Mississippi threadfin shad. Prog. Fish Culturist. pp. 179-181. Strawn, K. 1965. Resistance of threadfin shad to low temperatures. Proc. 19th Ann. Conf. S. E. Assoc. Game and Fish Conn. pp. 290- " 293. 1.4-4 ONS 12/76 i
s
.
1.4 FISH IMPINGEMENT ON INTAKE SCREENS AND ENTRAINMENT OF FISH EGGS AND LARVAE Specification: B. The entrainment of fish eggs and larvae in the cooling water system shall be monitored biweekly (every other week) during the major spawning period of April through July and an estimate made of the total number of fish eggs and larvae entrained and their survival. C. If the quantity or type of fish, or their eggs or - larvae, is determined to be of significance or to have a significant detrimental impact on the pro-pagation of fish of recreational importance, then plans for corrective action will be developed (Duke Power Company, 1973a). I. INTRODUCTION The effects of entrainment of fish eggs and larvae have been discussed previously (Duke Power Company, 1973b). II. METHODS AND MATERIALS The Condenser Cooling Water (CCW) System at ONS was sampled weekly for entrainment of fish eggs and larvae during the months of March through August. The sample procedure remained the same as discussed previously (Duke Power Company, 1975). Supplementary sampling was carried out in the ONS intake canal once a week during the same time period. This sampling consisted of two samples, one collected from the surface and one collected at a depth of five (5) meters. A #0 nylon mesh meter net was towed behind the boat for a 15 minute period at each depth. Duplicate samples were collected at each depth. A yard net, made of #0 nylon mesh material, was suspended under the skimmer wall for a period ranging from 20 to 110 minutes while the other tows were being made. A flow meter was used to calculate both the velocity and volumes of water sampled. A temperature and dissolved oxygen profile was taken each week on the plant side of the ONS intake skimmer wall. III. RESULTS AND DISCUSSION The results of the fish eggs and larvae entrainment sampling in the CCWsystemagesummarizedinTable1.4-4. The sample size ranged from 117.4 m to 200.4 m3 . One fish larvae was collected during the 1976 sampling period. On August 10, a threadfin shad larvae 25 mm long was collected from the precondenser outlet on-Unit 1 CCW system. The supplemental sampling in the ONS intake canal was composed of 123 samgles of which3 52 were surface tows with volumes ranging from 355.9 m to 1286.3 m . Two larvae fish were collected on June 2 from the surface tows: 1 yellow perch, 34 mm long and 1 threadfin shad, 20 mm in length. From a depth of five meters 48 samples, ranging in volume from 310.2 m3 to 882.1 m3 , were collected. Ne fish eggs or larvae were collected at this depth. Twenty-three (23) sa. es were collected 1.4-5 ONS 12/76
from the opening in the skimmer wall at a depth of approximately 3 23 meters. Sample volumes ranged from 101.2 to 743.2 m . Three larval fish and 3 fish eggs were collected: one threadfin shad, 4 mm in length, on May 28, three threadfin shad eggs on June 8; one black crappie, 19 mm in length, on June 22; and one threadfin shad, 5 mm in length, on August 18. IV.
SUMMARY
AND CONCLUSIONS
'
The sampling program for entrainment of fish eggs and larvae was increased in 1976 from April through July to March through August. The one larval fish found in the CCW system came from an August sample and is the first larval fish found in four years of sampling. The low numbers of fish eggs and larvae found in the ONS intake , canal plus the one larval form found in the increased CCW sampling indicates that entrainment of fish eggs and larvae is minimal and does not have a significant detrimental impact on the fishery resource in Lake Keowee. LITERATURE CITED Duke Power Company. 1973a. Appendix B to Facility Operating License Nos. DPR-38, DPR-47, and DPR-55, Technical Specifications for the Oconee Nuclear Station Unita 1, 2, and 3, Duke Power Company. U. S. Atomic Energy Commission, Docket Nos. 50-269, 50-270, and 50-287 (revised April 9,1976, NRC), Washington, D. C. Duke Power Company. 1973b. Oconee Nuclear Station. Semi-Annual Report, Period Ending June 30, 1973.
. 1975. Oconee Nuclear Station. Semi-Annual Report, Period Ending June 30, 1975.
1.4-6 ONS 12/76
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. _.
.
Table 1.4-1 Page 1 of 2 Results of Weekly Visual Inspections Of All Intake Screens Oconee Nuclear Station January-April, 1976 NUMBER CCW PletP DATE TIME FISH SIZE INTAKE OPERATING SPECIES NUMBER GROUPS (CM) TEMP (*C) MODE ON/0FF OBSERVED 1/06/76 1400 1A2 2 Threadfin Shad 4-6 11.6 ON 1B1 11 Threadfin Shad 4-6 11.6 0FF 1B2 9 Threadfin Shad 4-6 11.6 0FF 1C2 2 Threadfin Shad 4-6 11.6 ON 3Al 9 Threadfin Shad 4-6 11.7 ON 3A2 28 Threadfin Shad 4-6 11.7 ON 3B1 1 Threadfin Shad 4-6 11.7 ON I 3D2 1 Threadfin Shad 4-6 11.7 0FF I 1/14/76 1000 3B1 5 Threadfin Shad 4-6 10.8 0FF 3B1 5 Threadfin Shad 6-8 10.8 0FF 3B2 5 Threadfin Shad 4-6 10.8 0FF 1/22/76 1000 1A2 3 Threadfin Shad 4-6 10.3 ON 1/30/76 0900 1A1 2 Threadfin Shad 4-6 9.3 0FF 1A2 4 Threadfin Shad 4-6 9.3 0FF IB2 1 Threadfin Shad 4-6 9.3 ON 1C1 2 Threadfin Shad 4-6 9.3 0FF 1C2 2 Threadfin Shad 4-6 9.3 0FF IDI 2 Threadfin Shad 4-6 9.3 ON ID2 4 Threadfin Shad 4-6 9.3 ON 2A1 1 Threadfin Shad 4-6 9.5 0FF 2D1 1 Threadfin Shad 4-6 9.5 ON 3Al 1 Threadfin Shad 4-6 9.4 ON 3A2 2 Threadfin Shad 4-6 9.4 ON , O un
- C l hk O Dash indicates no fish observed.
'
.
_ . - - _ . _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ . . - _ _ _ - - - - _ _ - -
- - _ - . _ -_. _ .- - . ._. .- _-
Table 1.4-1 (Cont.) Page 2 of 2 Results of Weekly Visual Inspections of All Intake Screens Oconee Nuclear Station January-April, 1976 CCW PUMP l NUMBER SIZE INTAKE OPERATING SCREEN DATE TIME NUMBER G OUPS (CM) TEFT (*C) MODE ON/0FF__ OB ER ED 7 Threadfin Shad 4-6 9.3 OFF 2/06/76 1300 1A1 4 Threadfin Shad 4-6 9.3 0FF 1A2 3 Threadfin Shad 4-6 9.3 0FF 1C1
'Threadfin Shad 4-6 9.3 OFF IC2 4 9.3 ON 1D1 2 Threadfin Shad 4-6 1 Threadfin Shad 4-6 9.5 ON 2A2 0FF 1 Threadfin Shad 4-6 9.5 2D1 2 Threadfin Shad 4-6 9.4 0FF I 2/12/76 0900 1A2 Threadfin Shad 4-6 9.4 ON i'"- 2A2 3 2 Threadfin Shad 4-6 9.4 ON 2/19/76 0900 2A1 Threadfin Shad 4-6 9.4 ON 2A2 1 0FF 4 Threadfin Shad 6-8 9.7 2/27/76 1300 IB2 9.7 0FF 1 Threadfin Shad 4-6 IDI Threadfin Shad 6-8 9.6 0FF 2A2 1 2 Threadfin Shad 4-6 10.4 ON 3/04/76 1400 1A2 1 Threadfin Shad 4-6 9.9 ON 2D1 1 Threadfin Shad 4-6 10.2 ON 3/11/76 1300 2A1 -
-
3/18/76 0900 - -
-
-
-
3/25/76 1300 -
-
-
-
4/01/76
~
1400 -
-
-
-
4/08/76 1500 -
-
-
-
4/15/76 1400 -
-
-
0945
-
4/22/76 -
-
-
-4/29/76 1000
-
O un
-
C ! D '
- Dash indicates no fish observed.
.
.
% Table.l.4-2 Page 1 of 1 Summary of FI'.sh Impingement by SCUBA Inspection Oconee Nuclear Station March 30, 1976
.
*
.
I SPECIES COMPOSITION SIZE C"'.0UPS (C:0 ECREEN TOTAL
,: g7?.GR_ _Gi;*BE3]YELT.0:1 PERCli TliRE.*DFIN SliAD BLACK CRAPPIE Cl!UB_ IINIDENTTFTABLE. _2-LLe.=s ! 6-s I s-10 i ic+
1 1A1 726 16 159 1 0 550 0 708 16 1- 1 1A2 1410 60 525 0 0 825 0 1350 60 0 0 2A1 2368 107 1050 0 1 1210 1050 1210 108 0 0 I" 2A2 2855 150 1355 0 0 1350 1055 1650 150 0 0 i I
- 3Al 1255 230 450 0 0 575 0 1025 0 2 0 l3A2 1325 350 475 0 0 500 0 975 350 0 0
'l
! TOTAL 9939 913 4014 1 1 5010 2105 6918 912 3 ,
1 1, 0 4
. 1 O
v. l D_ ! e
. . - - - - . . _ , -
Page i of 7 Table 1.4-3 Sunniary of Fish Impingement Data Per Screen inspection Oconee Nuclear Station January-December, 1976 DECOMPOSITION CLASS ! D.O. TEf7 SIZE CEOUPS (cm) SCREEN WFI NFI SPECIES Cole 051 TION 4 mg/l C LATE 8-10
'
10+ 2 3 U M '2-4 4-6 6-8 1 YP TS i (kss) i BG 0 0 0 352 0 360 335 360 0 0 102 610 S-11.4 3Al' 1.8 712 0 17 0 0 0 379 0 210 1/09/76 375 210 0 0 525 64 560
- 3A2 1.5 '589 0 4 0 670 18 0 0 0 120 8 688 .0 8 120 560 0 45 15 575 B-10.8 381 1.7 0 620 15 0 0 0 0 15 45 575 0 015
.382. 1.6 635 50 1025 2 0 0 0 150 2 3.0 1077. 0 2 150 525 0 0 100 2 800 3C1 75 825 2 0 0 0 2 100 800 0 0 280 3C2 2.3 902 0 355 0 0 0 0 75 0 0 75 280 0 O 10 375 3D1 0.9 355 0 385 0 0 *O O 0 0 10 375 0 0 0 1221 37 4085 3D2 0.8 385 125 4507 711 0 0 48 1210 4085 0
-TOTAL 13.6 5343 0 0 0 275 2025 0 2300 0 0 S-10.8 0 0 275 2025 0 0 0 0 150 1810
.1/14/76 1A1 .5.98 2300 1810 0 0 1960 0 0 1325 .2050 B-10.7 1960 0 0 150 0 0 0 0 875 IA2 4.9 2200 2050 0 0 4250 750 1800
,
11.48 4250 0 0 0 0 0 0 450 181 1800 0 0 3000 800 2100
,
7.8 3000 0 0 1200 0 0 0 0 50
,1. IB2 850 2100 0 0 2950 0 950 2400 7.38 2950 0 0 1075 0 0 0 0 1C1 2400 0 0 2275 565 600 9.04 3350 0 0 950 0 0 0 0 335 IC2 600 0 0 1500 400 1100_
3.75 1500 0 0 900 0 0 0 50 IDI 0 450 1100 0 0 1400 150 1760 5215 13885 1D2 4.03 1550 0 1225 0 0 0 13885 0 0 19635 0 0 6975 TOTAL 54.36 20860 0
- 0 0 0 335 665 0 0 0 910 80 0 S-10.5 990 0 10 980 0 0 0 450 1140 1/16/76 381 2.48 0 0 0 1325 265 0 0 15 1575 0 0 0 800 1450 382 3.98 159u 0 0 0 1875 '375 0 B-10.4 2250 0 0 2250 0 0 0 750 1425 3C1 5.62 0 2175 0 0 0 1475 700 2115 4670 0 3C2 5.48 2175 0 5585 1420 0 0 0 25 6980 0 0- 0 .
-TOTAL. 17.56 7005 0 u
- Quarterly inspection - Screens pulled 7 days prior, cleaned, returnedh CCW andpump.
fish and debris allow to accumulate for a
-
Screen # - Represents Condenser Cooling Water (CCW) intake screen; two sets of screens for eac U WFI - Represents the weight of fish impinged (kgs). llaneous 5 N Q - Represents the number of fish impinged. Species Composition - BG = Bluegill, YP = Yellow perch, TS = Threadfin shad,
= No visible ' signs of. decomposition, 2 = slightly decomposed 3 = ba Decomposition Class -.1 unidentifiable S = nurface and B = bottom measurements. . . _ . .
Temp._ - Represents the lake temperatures in the intake canal: .-. I 4
r ,
.-
TABLE 1.4-3 (Cont.) Page 2 of 7 Summary of Fish Impingement Data Per Screen Inspection Ocor.ee Nuclear Station January-December, 1976 NTI SIZE CROLTS (cm) DECOMPOSITION CLASS D.O. TEMP DATE SCBEEN UFI SPECIES COhPOSITION 2-4 4-6 6-8 8-10 10+ 2 3 4 eg/l C f (kgs) # BC YP TS U H 1 6860 6 0 3500 2508 804 61 1 0 4300 2574 0 1/20/76 IDI 17.87 6874 10 4 978 0 S-10.2 43 9316 0 0 6050 2889 373 51 0 0 8385 1D2 24.34 9363 4 0 0 15000 B-10.0 2D1 37.50 15000 0 0 0 15000 0 8000 7000 0 0 0 0 0 0 0 12000 0 5000 7000 0 0 0 0 0 0 12000 2D2 30.00 12000
~ TOTAL 109.71_ 4,3237 3 14 47 16176 7 7000 0 _225g ~7 300T9gT7F7F T- 0Z y [B E755LT]7g . _ _ .
1/30/76 2A1 25.25 10100 0 0 6600 3500 0 0 ]1 00 0 0 0 900 T06~ ~3300 S-09.4 700 0 0 2700 450 0 0 0 700 1750 700 B-09.6 2A2 7.88 3150 0 0 2450 0 0 9050 4200 0 0 11000 2250 0 0 0 1600 7450 4200 TOTAL 33.13 13250 0 45 300 1150 0 0 1300 195 0 0 0 0 345 1150 2/12/76 1A1 3.9 1495 0 750 S-10.2 750 0 0 1025 90 0 0 0 365 1A2 2.9 1115 0 30 335 0 4.2 0 40 1510 0 0 0 1350 200 0 0 0 575 975
.2A1 1550 0 9.6 B-09.8 2.0 725 0 75 650 0 0 0 375 350 0 0 0 200 525 2A2 400 700 0 0 875 275 0 0 0 50 400 700
.~ 3Al 3.0 1150 0 50 450 0 0 825 177 0 0 0 100 452 450 7 3A2 2.6 1002 0 52 500 355 F 0 3050 0 0 5750 1287 0 0 0 975 3062 C TOTAL 18.6 7037 292 36J5 0 S-11.1 9f
-
0 0 92 0 0 0 1 0 91 22/19/76 1A1 ' O.25 92 0 0 1 0 0 0 13 1A2. 0.03 15 0 0 2 13 0 0 14 1 1 1 2025 245 0 0 1550 835 5 0 0 250 1395 245 B-10.0 2A1 4.80 2390 5 115 9.8 0 828 0 1562 794 354 0 0 0 1165 717 828 2A2 9.00 2710 295 1587 0 0 60 810 0 0 0 460 410 0 0 0 460 410 3Al 5.00 870 0 0 460 0 0 0 275 195 0 0 0 150 320 3A2 3.70 470 10 TOTAL _ 23.78 6547 5 480 4'fi 1177 0 1562 3185 1795 5 0 2 2525 2843 1177
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TABLE 1.4-3 (Cont.) 'page 4 og y Summary of Fish Impingement Data Per Screen Inspection Oconee Nuclear Station
- January-Decembe r. 19 76
-
DATE SCREEN - kTI ' NFI SPECIES C0!TOSITION SIZE CROUPS (cm) DEC0!TOSITION CLASS b.O. TCT
-# (kas) #. . EC ' YP TS U H 2-4 4-6 6-8 8-10 10& 1 2 3 4 mC/1 C
.
'6/06/76 1A1 3.0 1060 ~ .0 210 80 770 0 0 0 1060 0 0 0 0 290 770
-
IA2- 1. 6 - 590 0' 200 145 245 0 0 145 445 0 0 0 0 345 245 S-15.3 181 1. 6 . 565. 0 '180. 0 385 0 0 0 565 0 0 0 0 180 385 182 3.1 1055 0 10 0 1045 0 0 0 1055 0 0 0 0 10 1045 B-14.2 ICI 1.5 545 0 0 0- ~545 0 0 545 ,o 0 0 0 0 0 545 IC2 1.2 435 0 .0 0 435 0 0 0 435 0 0 0 0 0 435 1D1 1.0 375 10 115: 100 150 0 0 130 245 0 0 0 75 150 150 102 0.9 315 5 80 20 2I0 0 0 5 310 0 0 0 0 105 210 TOTAL 13.9 4940 15 795 '54 5 3785 0 0 825 4115 0 0 0 /> 1050 378 F~ 6/18/76 1A1 2.6 598 0 20 0 575 3 0 0 595 0 3 0 .0 23 575 IA2 0.9 331 16 95 50 170 0 0 76 225 0 0 'O O 161 170 S-18.0 2Al- 0.5 170 0 - 35 0 135 0 0 45 125 0 0 0 0 35 135 6.0 B-17.2-w -2A2. 0.1 ' - 30 0 0 'O 30 0 0 0 30 0 0 0 0 0 30
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h 3A2 0 0 0 0 0- 0 0 0 0 0 0 0 0 0 0 0 TOTAI. 4.1- 1129 16 150 50 910 3 0 121 1005 0 3 0 0 219 910
*6/25/76 1A1 1.65 .267 3 5 0 259 0 0 166 100 0 1 0 0 7 259 1A2. 1.22 158L 72 .47 0 39 0 0 47 111 0 0 0 0 119 39 S-18.0 2A1 1.58 200 35. 0 0' 165 0 0 109 91 0 0 0 0 35 165 6.2
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TABLE 1,4-3 (Cont.) Page 6 of 7 Summary of Fish Impingement Data Per Screen Inspection Oconee Nuclear Station Janua ry-Decembe r, 1976 LTI NFI SPECIES COMPOSITION SIZE CROUPS (ca) DEGitTOSITION CLASS D.O. TE?T LATE SCPZEN (kgs) YP TS U H 2-4 4-6 6-8 8-10 10+ 1 2 3 4 zg/l C i # BC 11/17-18J 2A1 1.50 500 0 0 350 150 0 500 0 0 0 0 0 0 350 150 74 2A2 0.19 65 0 0 35 30 0 35 30 0 0 0 0 0 35 30 2B1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2B2 0 0 -0 0 0 0 0 0 0 0 0 0 0 0 0 0 2Cl 0.13 47 0 0 2 45 0 2 45 0 0 0 0 0 2 45 2C2 0.18 60 0 0 0 60 0 0 60 0 0 0 0 0 0 60 2D1 0.45 160 0 0 75 85 0 130 30 0 0 0 0 0 75 85 2D2 0.06 20 0 0 5 15 0 5 15 0 0 0 0 0 5 15 __ TOTAL 2.51 85L 0 _ 0 467 385 0 672 lo6 0 0 0 u o 467 7BF 12/01-02; 1A1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 7t IA2 0 0 0 0 0 0 0- 0 0 0 0 0 0 0 0 0 2A1 2.20 785 0 0 285 500 0 0 785 0 0 0 0 285 0 500 7' 2A2- 4.65 1662 0 0 662 1000 0 0 1662 0 0 0 0 662 O 1000 3Al 0.01 7 0 0 7 0 0 0 7 0 0 0 0 7 0 0 f 0 0 0 0 0 0 0 0 0 G 3A2 0 1 0 0 1 1 1 3D1 ' 0.01 6 0 0 1 5 0 0 6 0 0 0 0 1 0 5 3D2 0.36 127 0 0 27 100 0 0 127 0 0 0 0 27 0 100 TOTAL 7.23 2588 0 0 983 1605 0 Oj 2588 0 0 0 0 983 0 1 TOT . O
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4 Page 7 of 7 TABLE 1.4-3 (Cont.) Sunnaary of Fish Impingement Data Per Screen Inspection
'
Oconee Nuclear Statton January-December, 1976
.
DECOMPOSITION CLASS D.O. TEMP t SIZE CEOUPS (cm) IuTE SCREE 4 WF1 3FI SPECIES COttPOSITION C 8-10 10+ 2 3 4 m6/1 YP TS U M 2-4 4-6 6-8 1
# (Lgs) i BC 1 0 20 0 0 0 855 0 0 20 835 0 0 0 835
*12/08/76 1A1 2.56 855 0 910 0' O O O 910 0 0 s.12.7 ;
2.73 910 0 0 910 0 0 0 0 9.5 t 1A2. 1150 0 10 0 0. 1160 3.48 1160 0 10 !!50 0 0 0 0 B-12.6 2Al 575 0 0 0 0 575 0 2A2 1.72 575 0 0 575 0 'O O 73 5 0 0 78 1 0 0 0 1 3Al 0.22 79 1 0 73 5 8 25 25 0 0 34 1 0 0 0 2 8 3A2 0.10 35 1 2 1 _._3H L .O __ _q_ __.utE ._._ z 3q _ _.g _ _ q_ 2654 __i30_ JF l _.IDIA1A.10.8LJ61L 31__ 30_ 800 0 0 0 0 0 0 800 0 0- 800 0 0 12/29/76 2C1 '1.76 800 0 0 260 0 0 0 0 0 0 260 0.60 260 0 0 0 260 0 800 2C2 0 1700 0 0 0 0 0 90C 3.91 1700 0 0 900 800 0 625 2D1 0 1525 0 0 0 0 350 550 3.51 1525 0 0 900 625 0 645 2D2 0 895 0 0 0 0 0 250 1.97 895 0 0 250 645 0 20 3C1 0 265 0 0 0 0 0 245 0.65 265 0 0 245 20 0 300 I. 3C2 0 670 0 0 0 0 0 370 1.47 670 0' O 370 300 0 0 870 0 7- '3D1 0 0 0 850 20 0 0 0 2.00 870 0 0 870 5 ~ 3D2 0 0 3535 3450 0 0 6% 5, 20 0 0 0 _ 350 _3185 _3450 TOTAL 15.87 6985 650 0 0 1055 0. 0 0 0 405 2.53 4055 0 0 1055 0 0 0 12/30/74 2A1 . 0 0 0 226 360 586 0 585 0 0 0 585 1 2A2 1.35 1 0 1550 0 0 0 0 0 925 625 3.72 1550' O O 975 625 0 750 281 0 0 0 0 0 885 0 0 885 750 0 0 1635 2B2 3.92 _1635 0 4825 1 0 Q 0 631 2820 1375 TrrrAl- 11 A2 _&&2 L. 0 1 1450 L1Z$_ 0 _ km .
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Table 1.4- 4 Page I of I Results of Ichthyoplankton Survey Oconee Nuclear Station March-August, 1976 Intake Discharge CCW Pumps Sample Number of Number of SUPPLIMENTAL SAMPLit4 ONS INTAEE Duration Temp Temp Operating Flow Fish Eggs Fish Larvae SURrACE 5 HETERS SKHMER k'ALL Date Time Houre *C 'C f Volp)e (m (m3 / min) Entrained Entrained A gflana eI e D #I
'
3/02/76 0830 24.0 9.9 10.6 1 120.0 0.083 0 0 0 0 0 0 0 0 3/09/76 0815 24.0 9.8 9.8 1 136.3 0.095 0 0 889.2 0 N64.0 0 0 0 1/16/76 0815 24.8 10.0 10.1 2 134.9 0.091 0 0 847.2 0 574.2 0 0 0 3/23/76 0820 24.0 11,1 11.3 2 141.8 0.098 0 0 775.8 0 472.8 0 =118.9 0 3/30/76 0820 24.1 11.2 11.6 2 131.3 0.091 0 0 692.4 0 0 0 0 0 4/05/76 G830 24.0 11.8 13.5 2 130.8 0.091 0 0 705.9 0 s88.8 0 167.3 0
"
- 4/13/76 0830 23.5 12.2 20.8 3 117.4 0.083 0 0 740.3 0 726.0 0 129.9 0
.7 4/21/76 0810 24.0 12.4 42.4 2 125.4 0.087 0 0 679.8 0 t> 31. 2 0 304.3 0 0 4/27/76 1100 27.1 12.8 12.8 2 135.4 0.083 0 0 696.4 0 584.3 0 158.5 0 5/05/76 0815 24.2 13.2 13.3 2 126.3 0.087 0 0 688.0 0 h45.0 0 132.3 0 5/11/76 1135 23.1 13.5 13.6 3 125.8 0.091 0 0 964.7 ,* O t> 26. 0 0 138.1 0 5/18/76 0818 24.0 14.2 14.3 2 136.3 0.095 0 0 71. . O 679.0 0 146.6 0 5/25/76 0820 24.1 14.3 14.4 2 136.8 0.095 0 0 720.5 0 b62.3 0 118.7 1 6/02/76 0825 23.8 15.2 26.4 3 140.3 0.098 0 0 763.6 2 536.8 0 145.1 0 6/Os/76 0830 26.2 15.7 25.8 3 160.5 0.102 0 0 547.2 0 428.2 0 144.7 3 eggs 6/15/76 0820 24.0 16.1 27.2 3 130.9 0.091 0 0 777.4 0 b53.8 0 196.8 0 6/22/76 0805 24.8 16.4 25.9 3 146.7 0.098 0 0 692.7 0 580.2 0 135.2 1 6/29/76 0805 24.4 17.1 28.0 3 155.3 0.106 0 0 473.2 0 0 0 105.0 0 7/07/76 0820 24.5 17.5 28.3 3 144.7 0.098 0 0 650.8 0 b88.3 0 130.6 0 7/13/76 3815 24.0 18.4 27.7 4 130.8 0.091 0 0 747.2 0 712.7 0 743.2 0 7/20/76 1115 25.2 19.2 29.7 3 171.5 0.114 0 0 1002.9 0 B15.2 0 222.7 0 7/27/76 0805 24.8 19.7 29.1 4 169.2 0.114 0 0 710.2 0 b79.0 0 101.2 0 8/03/76 0815 24.2 20.7 29.9 4 148.2 0.102 0 0 750.0 0 729.0 0 194.3 0 8/10/76 0830 24.0 21.2 28.8 4 141.8 0.098 0 1 714.0 0 b22.4 0 221.3 0 8/17/76 1100 24.0 21.9 30.9 4 190.8 0.132 0 0 515.9 0 350.2 0 121.8 1 8/24/76 0815 24.5 23.1 32.2 4 200.4 0.136 0 0 696.6 0 705.3 0 127.4 0 8/31/76 0845 24.0 24.1 31.3 3 163.6 0.114 0 0 781.6 0 740.9 0 146.0 0 3,
u s i M S
1.5 PHYTOPLANKTON-ZOOPLANKTON ENTRAINMENT MORTALITY STUDY Specification: At least 6 times per year water samples will be collected by either plankton nets or pumps at the condenser cooling water systems intake and at the heated water discharge before it enters the receiving water. Samples will be analyzed for types, quantities and survival of the various planktonic groups. Sampling will be such to encompass the range of temperature rises across the condenser (e.g., 16*-28'F) (Duke Power Company, 1973a). I. INTRODUCTION , The effects of entrainment in condenser cooling water on planktonic organisms have been discussed previously (Duke Power Company, 1973b). II. METHODS AND MATERIALS Previously described methods and materials were used in 1976 (Duke Power Company, 1973b, 1973c, 1974a, 1974b, 1975a, 1975b) except for the following amendments: Phytoplankton Entrainment. Phytoplankton were collected on six occasions during 1976 from the condenser cooling water (CCW) system at ONS. Algal density and biovolume units have been changed from a per milliliter basis to a cubic meter basis for consistency with chlorophyll units. Carbon uptake rates for 1976 were determined using an amended inorganic carbon calculation. Carbon uptake rates previously reported in 1974 and 1975 should be reduced by 4.17 when comparing with either 1973 or 1976 rates. True chlorophyll and pheopigment data are not included this period because of instrument detection inadequacies. One-way (factor) analysis of variance was performed on density, biovolume, and carbon assimilation data to identify station differences in means (Sokal and Rohlf, 1969). Chlorophyll data were analyzed by a two-way (factor) analysis. When significant differences were detected, Duncan's New Multiple Range Test was used to segregate differences in means (Steele and Torrie, 1960). Zooplankton Entrainment, , Regular zooplankton entrainment studies were conducted in January, March, May, July, September, and November of 1976. A'special entrainment study to determine entrainment effects at varying power levels of Unit I was conducted on April 3, 6, 9, and 14. The procedures for determining effects of entrainment upon the zooplankton were the same as discussed in previous semi-annual reports (Duke Power Company, 1973b, 1973c, 1974b, 1975a, 1975b) with the following exceptions: [ 1.5-1 ONS 12/76 l
(a) Afternoon samples were taken~at the intake and discharge on each sampling date. , (b) Physical damage data were processed using the same basic technique as used for motility-immotility analysis. (c) A special entrainment study was conducted April 3 through April 14 to determine if there were changes in Crustacea immotility and damage as Unit I was taken from zero power to near full power output. During a this varying power level study, immotility and damage analyses were ( conducted at four power levels ranging from zero percent (megawatt thermal) output to 86% of Unit I maximum thermal capacity. - In conjunction with the varying power level entrainment study, open lake zooplankton immotility was studied at Station 502.0 on April 7, 1976. Samples were collected in the morning and afternoon with a 0.5 meter net tow from ten meters to surface (10-s) and bottom to surface (b-s). Immotility analyses were performed utilizing the same metheds as were used for the intake site. The purpose of open lake zooplankton immotility and damage analyses was to compare lake immotilities with those at the intake (509.5). (d) A diel study was conducted in the intake canal on 9 and 10 August 1976. The objective of this study was to document diel patterns, if any, of zooplankton being entrained through ONS. Two stations, 509.0 (near the skimmer wall) and 509.5 (near the intake structure) were sampled at approximately four hour intervals (1430,1830, 2230, 0230, 0630, and 1030 hrs.). Triplicate bottom to surface tows were taken using a
.5 meter (mouth diameter) 76 micron (mesh size). zooplankton net. Data for Station 509.5 at 0230 hrs. is not available because these samples were not preserved. Subsampling and counting techniques have been previously described (Duke Power Company, 1973b, 1973c) with the following exceptions. A single subsample was removed from each sample for each Crustacea and Rotifera count. Population means for each time period were derived from standing crop estimations of three replicate samples.
The standing crop data were then transformed to either logio or log 10 (X 10) and were then tested for homogeneity of variance and normality using Bartlett's test (Sokel and Rohlf, 1969) and the Kolmogorov-Smirnov statistic (Steel and Torrie, 1960; Lilliefors, 1967), respectively. A one-way analysis of variance (ANOVA) was used to test for significant standing crop differences among times for the major taxonomic categories. If the standing crops were found to differ significantly over time with the ANOVA, then Duncan's New Multiple Range Test (Steele and Torrie, 1960) was applied to determine which times were significantly similar or different. All statistical results were considered significant with
= = 0 05 or less.
(e) On September 19, 1976, a stain study was conducted during the regular morning entrainment study. Duplicate samples were collected at the q ( f) 1.5-2 ONS'12/76
-
L
!
i intake and discharge sites using the same methods as used for collecting immotility samples. The samples were placed in bottles with sufficient Neutral Red stain to obtain a 1:1000 stain dilution and allowed to stand for 20 minutes before preservation and rinsing. After rinsing, the samples were examined and mortality determined by lack of staining. These results were then compared to the regular immotility analysis. IV. RESULTS AND DISCUSSION ,
,
Phytoplankton Standing Crops.
.
Estimates of algal density and biovolume in the CCW system at ONS are presented in Table 1.5-1. Average algal densities reached a peak in July (429 X lo sunits /m )3 and were lowest in May (130 X los units /m3 ). Densities were dominated by Bacillariophyceae (diatoms) in March, May, and November (Appendix B, Section 4) . Chlorophyceae (green algae) dominated densities during January, July, and September. In 1976, algal species which dominated densities were the following: (1) Monoraphidium setiforme in January; (2) Cyclotella stelligera and Nephrocytium agardhianum in March; (3) C. stelligera in May; (4) coccoid green algae in July and September, and; (5) Rhizosolenia eriensis in November. Average algal biovolume in the CCW system was greatest in November (179.5 mm 3 3/m ) and lowest, of all the sampling dates, in May (73.2 mm3/m3 ) (Table 1.5-1). Algal biovolume during 1976 consisted mainly of diatoms in January, May, July, and November. Dinoflagellates (Dinophyceae) dominated biovolumes in March and September samples (Appendix B, Section 4). Species which dominated biovolumes were the following: (1) R. eriensis
-
in January and November; (2) Peridinium spp in March and September; (3) C. stelligera in May, and; (4) certain diatoms, cryptophytes, and green algae in July. Mean algal chlorophyll from the CCW system showed minor spatial variation I (0.97 to 1.00 mg/m3 ) during 1976 (Table 1.5-2). Maximum mean chlorophyll ! was noted for September (1.25 mg/m3 ) and the minimum mean occurred in July ' (0.68 mg/m3 ). The statistical analyses (ANOVA)-performed on density, biovolume, and chlorophyll data (Table 1.5-3) indicated the following: (1) no significant
- differences among stations were detected for all three phytoplankton parameters; (2) the significant time difference for chlorophyll was attributed to greater chlorophylls entering the CCW system in January, March, and September than during July and November. The significant chlorophyll interaction was caused by a time effect on relative chlorophyll levels among stations. This effect indicated that a more frequent sampling schedule was required to separate any possible station differences.
l I ' Phytoplankton Metabolism: Carbon Assimilation. j l Carbon uptake rates per volume of water (m3 ) were used in past reports l to estimate algal retabolism as related to cooling water use at ONS. 1 1.5-3 ONS 12/76 ! !
.
An additional measure for this reporting period, assimilation ratio (the rate of organic matter synthesis per unit of standing crop), was also used to estimate algal metabolism (Odum,1971). 4 Generally, mean monthly carbon uptake and assimilation ratios were highest in November (2.38 mgC/m /hr. and 3.64 mgC/mg Chlorophyll /hr., 3 respectively)'but lowest in July (0.50 and 0.69, respectively) (Table 1.5-4). Measures of surface pH were also elevated in November indicating algal productivity was increased over November,1975 productivity (Water Quality, Section 1.3.1). The low July metabolism was prob.ibly related to thermal stratification which caused vertical differences 12 standing crops (Phytoplankton-Zooplankton Receiving Water Study, Section 1.3.4). .. The effects of thermal elevation, mechanical agitation (abfasion), and total CCW passage on phytoplankton metabolism were analyzea by the following ratios: (1) thermal ef fect - heated intake water metabolisa: control intake water metabolism; (2) mechanical effect - heated disclarge metabolism: heated intake metabolism, and; (3) total effect - heated disclarge metabolism: control intake metabolism. Table 1.5-5 shows the results of a one-way ANOVA for metabolism data. Significan* differences between the ratios were observed in May and September, 19/6 studies. Thermal elevations significantly inhibited carbon assimilation ratios by 41% ia September. This was probably related to a high intake temperature (24.6 C) observed at that time (Figure 1.5-1). Mechanical factors caused a stimulation in May (24%) and September (158%). Thus in September studies, the thermal inhibition and mechanical stimulation, combined, created a net stimulation of algal metabolism (Figure 1.5-2) . The May and September mechanical stimulations of metabolism also were shown in the total CCW effect. Carbon uptake rates showed significant changes at other times but when the rates were corrected for standing crop, the
- significance was lost.
Zooplankton Entrainment: Assessment of Immotility. Data for each study date indicating taxa observed, time of sampling, number of organisms observed, percent immotile, corrected percent immotile (CPI) and collective corrected percent immotile (CCPI) are presented in Appendix B, Section 5, pp. 7-95. Entrainment field data are presented in Appendix B, Section 5, pp. 1-6. Collective corrected percent immotile (CCPI) is a value resulting from mathematically compositing raw count data for morning and afternoon samples. Negative CPI and CCPI values resulted when the
' percent of immotile organisms at the post-condenser.or discharge sites was lower than the percent of immotile organisms in the pre-condenser or intake sites, respectively. Zooplankton immotility should not decrease
as a result of condenser or station passage, therefore, negative CPI's
~
i and CCPl's were assumed to be zero. Zooplankton Entrainment: Pre-condenser - Post-condenser Sites. t The CCPI values'at the pre- and post-condenser sites for' the major taxonomic categories are presented _in Figure 1.5-3. The CCPI's of all three major-1.5-4 ONS 12/76 , ,
- ,, _
taxonomic categories were highest in January (Lcustacea, 7.6; Copepoda, 7.9; Cladocera, 6.6). This corresponded with the highest AT (12.8 C*) for the dates sampled (Figure 1.5-4). The CCPI's of the Cladocera, Copepoda, and Crustacea for the remainder of the sample periods ranged from 0.0 to ' l.3. Figures 1.5-5 and 1.5-6 indicate CCPI levels for the prevalent Copepoda and Cladocera. The CCPI values for Bosmina coregoni and cyclopoid copepodids w,ee greatest in January and July. There were no apparent explanations j for the trends exhibited. Zooplankton Eatrainment: Intake - Discht.rge Sites.
.
.
CCPI values for the major taxonomic categories studied at intake - discharge sites are presented in Figure 1.5-7. Crustacea CCPI values were greatest in July (38.1) and November (13.5). For the remainder of the months sampled, CCPI's ranged from 0.0 to 4.8. The Copepoda and Cladocera CCPI's were analyzed separately. Their values followed the same trends as
, Crustacea. The intake - discharge CCPI trends for Cladocera, Copepoda, 1 and Crustacea generally followed the same pattern as those reported previously (Duke Power Comoany, 1975a, 1975b), with increased CCPI from January to the greatest CL.I in July followed by a decrease through the remainder of the year.
Zooplankton Entrainment at Varying Unit I Power Levels. The major taxonomic category CCPI. values for the dates of the special study are presented in Figures 1.5-8. The pre-condenser - post-condenser values for Crustacea were 16.9, 0.0, 0.6, and 10.5, from April 3 through April 14. There was no apparent explanation for the high initial CCPI values of April 3. With the exception of the 16.9 CCPI on April 3, the Crustacea CCPI values increased as the Unit I power level and AT increased (Figure 1.5-9). The Unit I AT decreased (1.0 C') on April 14. This decrease was caused by the increased CCW flow created by turning on an . additional Unit I CCW pump. The increased CCW flow and related stresses probably more than offset the benefit (to the zooplankton) of the decrease in AT; hence, the increase in Crustacea CCPI from April 8 to April 14. Copepoda and Cladocera pre-condenser - post-condenser CCPI's followed the same general trend as Crustacea. Little effect was noted on the Copepoda as Unit I power levels and AT's were increased. From April 6 through April 14 a steady increase in CCPI vas noted for the Cladocera (Figure o 1.5-10). It appearea that the Clalocera were more susceptible to AT, flow changes, and related stressea than the Copepoda. As with the pre-condenser - post-condenser values, CCPI's for intake-discharge on April 3 were much nigher than the other days sampled. Reasons for the high immotility values were not apparent. Intake-discharge CCPI for Cruttacea and Copepoda, April 6 through April 14 follow the same trend as station power level (Figures 1.5-9 and 1.5-8). Cladocera CCPI increased as station (intake - discharge) AT increased from
$
1 1.5-5 ONS 12/76 -
. . - .
April 6 to April 8 and decreased as station (intake - discharge) AT decreased from April 8 to April 14. These were the only apparent trends for the major taxa. A comparison of percent immotility data for Station 502 (b-s, 10-s) and the intake canal (509.5, 10-s) is presented in Figure 1.5-14. The Crustacea percent immotility at Station 502 was slightly greater in the b-s sample (4%) than the 10-s sample (2%). The percent immotility was probably greater The b-s, 502, sample was biased than 4% in the water column below 10 m. with the filtering of 10-s water during collection. . in the upper , Correspondingly, greater densities of Crustacea were present 10 m of the water column during thermal stratification (Section 1.3.4) which supports the theory that the Crustacea in the lower depths are unable to orient or maintain themselves vertically in the water column due to stress or death. This theory is further supported by the compara-tively high range of percent immotility of Crustacea in the intake canal (7-19%) between 3 Ayll and 14 April 1976, compared to the 2% immotility lakeside of the skimmer wall (10-s) on 4 April 1976. Future comparisons of immotility between the intake and the lake may provide the accessary information to determine if a greater percentage of zoo-plankton in the lower portion of the water column are stressed or immotile prior to induction into the intake canal. Zooplankton Entrainment Damage Analysis Zooplankton damage assessment methods and their possible applications were discussed previously (Duke Power Company, 1975a). In general, two Damaged categories were established, damaged and not apparently damaged. organisms were defined as those showing any obvious physical disruptions (e.g. torn carapace, nissing or broken parts) . Daphnia carapace balooning is a common result of preservation and was therefore not considered damage. Data including taxa, number observed, time of sampling, percent damaged, corrected percent damage, and collective corrected percent damage are presented in Appendix B, Section 5, pp. 96-172. Percent damage data for the Crustacea with the exceptions of th9 post-condenser in January and the discharge in May, indicated consistently higher damage at the pre-condenser, post-condenser, and discharge sites than was encountered at the intake. With the exception of September, Crustacea percent damage was consistently lower at the post-condenser than at the pre-condenser. There was no apparent explanatior. for this trend. Figures 1.5-10 and 1.5-11 show collective percent damage for Cladocera, Copepoda, and Crustacea for each regular sampling date. Damage to Cladocera and Copepoda followed the same general trends discussed for the Crustacea. Collective corrected percent damage (CCPD) data for Cladocera, Copepoda, and Crustacea are-presented in Figure 1.5-12. CCPD for the intake-1.5-6 ONS 12/76
discharge indicate a net increase due to ONS condenser cooling water sysccm passage on each study date. Crustacea CCPD values (intake - discharge) were greatest in July and September (of the months regularly sampled). July and September (of the months sampled) showed greatest intake and discharge temperatures (Appendix B, Section 5, pp. 4 and 5). Zooplankton Entrainment Damage Analysis at Varying Unit I Power Levels. The CCPD values of Cladocera, Copepoda, and Crustacea for the dates studied are presented in Figure 1.5-13. The pre-condenser - post-condenser CCPD values for the Crustacea were 0.0, 0.0, 0.0, and 5.8 from April 3 through April 14. Copepoda CCPD's were 0.0, 1.2, 0.0, and 5.2 from April 3 through Cladocera CCPD's were 0.0, 0.0, 2.1, and 5.1 from April 3 through
~
April 14. April 14. ,There was a general increate in pre-condenser - post-condenser CCPD values itom April 3 to April 14 as Unit I increased power output. Intake-discuarge CCPD values were variable through the four dates studied. There were no obvious trends noted. Percent damars values for the open lake portion of this study (April 7) are presented in Figure 1.5-14 along with intake percent damage values for April 3, 6, 8, and 14. Station 502 b-s percent damage was greater overall than 10-s percent damage. Percent damage in the intake (509.5) was variable, but tended toward being higher than Station 502 b-s percent damage. The need for future studies during thermally stratified and isothermal periods was indicated. Zooplankton Entrainment: Intake Canal Diel Study Results of Bartlett's test showed homogeneity of variances for all the major taxonomic categories (a = .05). The data were considered to be normal or close enough (Kolmogorov-Smirnov Test, a = 0.05) to be treated as such for the objectives of this investigation. Standing crop data (no/1) for the major taxonomic categories are presented in Table 1.5-6. Results of ANOVA and Duncan's New Multiple Range Test (Duncan's Test) are presented in Table 1.5-7. Mean standing crop, percent of taxa and percent of total zooplankton data are presented in Tables 1.5-8 and 1.5-9 for selected representative species and life stages present at each sampling time. The predominant rotifers found during this study included Kellicottia i bostoniensis, Collotheca spp., Conochilus unicornis, and Conochiloides spp. Results of the ANOVA revealed that the total Rotifera densities were sig- ] nificantly different (a = 0.05) among sample collection times at both stations. The greatest Rotifera standing crops occurred at the skimmer wall station in the early morning, 0630 hr (4.7 no/1), and near midnight, 2230 hr.(2.8 no/1). Total Rotifera standing crop maxima near the intake structure were 5.4 no/l and 5.1 no/1 at 0230 hr and 0630 hr, respectively (Figure 1.5-15) . Bosmina coregoni, Daphnia laevis, and Diaphanosoma leuchtenbergianum were. the predominant cladocerans collected during this study. Results of ANOVA~ for total Cladocera showed that densities at both stations differed significantly among sampling times. Duncan's test revealed that signifi-cantly greater densities occurred at the skimmer wall station in the late 1.5-7 ONS 12/76 I
.. -
evening at 1830 hr (9.2 no/1) and midmorning at 1030 hr (6.9 no/1). At Station 509.5 densities were significantly larger at midday (21.4 no/1) than early morning (2.9 no/1). Total Cladocera densities at each sampling time is presented in Figure 1.5-15. Juvenile copepods, (nauplii and copepodids) were the predominant organisms comprising the total Copepoda community. The major adult copepods included Diaptomus mississippiensis, Cyclops thomasi, and Tropocyclops_prasinus. Analysis of variance revealed significant diel differences in standing crops at both stations. Near the skimmer wall, a significantly greater density 1830 hr compared to other (26.4 no/1) of total Copepoda were present at
.
'
sampling times with a minimum of 3.9 no/l found at 1430 hr. A similar
.
diel distribution was found near the intake structure, with maximum density of 37.7 no/l at 1430 hr and the minimum (6.0 no/1) occurring 4 hours later (Figure 1.5-15). Total zooplankton standing crops differed,significantly over time at both stations. At the skimmer wall station, the major peak was observed at 1830 hr (37.3 no/1) which was significantly greater than other sampling times (Figure 1.5-15). At Station 509.5, a density of 63.3 no/1 at 1430 br was significantly greater than densities collected at other sampling times. Several explanations were considered to account for these diel var.iations in zooplankton density. Horizontal " clumping" or " patchiness" by the zoo-plankton was believed to be a major factor accounting for these diel variations. This type of clumping, as documented by Tonolli (1949, 1958) and Comita and Comita (1957) has most often been ascribed to reactions by the zooplankton to physical changes such as light, temperature, and Langmuir spirals (Stavn,1971; McNaught and Hasler,1961). Cassie (1961) asscciated clumping with different organisms having comparable ecological requirements. Hydrodynamics have been associated with clumping by several insrestigatirs (Ragotzkie and Bryson, 1953; McNaught and Hasler, 1961). The Jocassee Pumped Storage Hydro facility which is located at the upper end of the Keo-wee River Arm of Lake Keowee, is capable of causing flows (either into or out of Lake Keowee) on the order of six to seven times those of Oconee's maximum cooling water flow rate. Jocassee typically generates during the day (flow into Keowee) and pumps at night (flow out of Keowee) as indica-ted in Figure 1.5-16. The variations in both the magnitude and direction of Jocassee's flows could affect the distribution of zooplankton in the strata of water that is drawn into the intake canal. However, the results of this study did not show any clear relationship between Jocassee opera-tion and patches of zooplankton in the intake canal. Although " patches" were discovered near the mouth of the intake canal, the time rate for a patch to flow through the canal and to the intake structure could not be determined from the standing crop data. Based on the lake' level at the time of this study, (795 mal) and the number of CCW water pumps operating (avg. = 10), the water retention timea in When the intake
" clump" canal of plankton would have been about 6 hours (Table 1.5-10).
was found near the skimmer wall (Station 509), for example, the total 1.5-8 ONS 12/76
zooplankton at 1430 hr, no obvious pulse af this magnitude was observed at Station 509.5 at either 1830 hr or 0230 hr, 4 and 8 hours later, respectively. The affect (s) of hydrodynamic, within the intake canal were also considered as potential factors influencing the zooplankton distribution. Near the skimmer wall, turbulence with obvious upwellings and eddy currents are present. Current patterns, with eddies and probably Langmuir type movement (Stavn, 1971) probably develop near the intake structure. The extent to which these intake canal hydrodynamics can influence or structure the zooplankton community distribution is unknown; however, these factors , probably exert a secondary role in effecting " patchiness" as compared to ,l ecological and physical factors lake-side of the skimmer wall. l Zooplankton Entrainment: Stain Study. The results of the stain study are presented along with results from the regular motilit- analysis in Table 1.5-12 (although some problems ensue from consideri: immotile organisms dead, this assumption is made in Table 1.5-15) The results from the staining technique were, at best, variable. Th- mortality estimations for the filter feeding organisms , were generally lower than those arrived at by the motility analysis while those of the raptorial organisms and the nauplii were higher. Therefore, the use of the 1:1000 dilution of Neutral Red stain was rejected as a suitable entrainment study aid. V. Sf"C'AEi AND CONCLUSIONS l 4 Phytoplankton Entrainment i Entrainment-mortality studies of phytoplankton were completed on six dates l in 1976. Algal densities were dominated by diatoms and green algae. Bio-volumes were dominated by dinoflagellates and diatoms. Statistical analvses of standing crop data indicated a lack of any signifi-cant sampling station differences for density, biovolume, and chlorophyll measurements as water passed through the CCW system at ONS. Time (season) differences in standing crops did occur. Chlorophyll from entrained - phytoplankton was maximum in September and was lowest during July. Assimilation ratios of entrained phytoplankton at ONS were greatest after j fall overturn. July assimilation ratios were the lowest of any measured ' durinh 1976, probably related to thermal stratification in Lake Keowee. In May and September, assimilation ratios were significantly elevated due to CCW passage at ONS. Mechanical factors induced changes in algal j metabolism more often than thermal elevations. Benda et al. (1975) ; reported detrimental mechanical effects on carbon uptake of Lake Michigan i phytoplankton. Miller et al. (1976) have shown that carbon uptake rates of entrained Ohio River phytoplankton were regularly stimulated at dis-charge temperatures up to -25 C, but decreased rates were noted above that discharge temperature. For ONS phytoplankton metabolism studies, a significant inhibition of carbon metabolism (41%) was observed at a 1.5-9 ONS 12/76 j
O No other discharge temperature of ~30.5 C conjunction with a AT of ~7 C . thermal effects were noted for 1976 studies. Zooplankton Entrainment Regular entrainment studies were conducted on January 14, March 17, May 11, July 8, Setember 15, and November 10, 1976. Results of motility-immotility studies indicated no clear relationship between Cladocera, Copepoda, and Crustacea CCPI for pre-condenser to post-condenser and time of year, ambient temperature, or discharge temperature. The highest CCPI for the three major groups at pre-condenser - post-condenser ' occurred in January which coincided with the highest AT for the months sampled. The pre-condenser - post-condenser CCPI values throughout the year were in general lower than in 1975. Analysis of intake-discharge CCPI's for Cladocera, Copepoda, and Crustacea revealed the same general pattern in 1976 as was found in 1975. CCPI increased from January to a peak in July followed by decreases in September and November. The special stody performed April 3 through April 14 showed little effect on Copepoda CCPI's at pre-condenser - post-condenser as Unit I power levels and AT's increased. Cladocera data at that site demonstrated an increase in CCPI from April 6 to April 8 with a slight decrease on April 14. It appears that the Cladocera were more affected by temperature and pressure changes than Copepoda. Total Crustacea CCPI values for pre-condenser - post-condenser showed no clear trends related to AT or Unit I power level. Intake-discharge Copepoda and Crustacet CCPI's for April 6 through April 14 followed the same trend as station power level. Cladocera CCPI's varied with AT April 6 through April 14. No other trends were apparent in the immotility study. A study of open lake (502.0) immotility showed that the percent of immotile organisms in the intake was greater than the percent of immotile organisms at Station 502 10-s and 502 b-s. Percent damage values were generally higher in the intake than at 502 b-s, and 502 10-s. Future comparisons of immotility and damage between the intake and Station 502.0 are indicated to determine if a greatt? percentage of zooplankton in the lowcr portion of the water column are stressed or immotile prior to induction into the intake canal. Damage analysis on the regular sample dates indicated that damage at pre-condenser, post-condenser, and discharge consistently exceeded damage at the intake. With few exceptions, there was a net increase in damage due to plant passage. Damage at the pre-condenser was generally higher than damage at the post-condenser. There was no apparent explanation for this trend. CCPD for intake-discharge was'most pronounced in July and September which were the months (of 6 sampled) of greatest intake and discharge tem-peratures. This indicated that damage susceptibility could be related to temperature. 1.5-10 CNS 12/76
..
-.
Damage analysis for the dates of the special study indicated a net increase in pre-condenser - post-condenser CCPD valuas from April 3 to April 14 as the Unit I power level increased. CCPD values varied for intake-discharge through the four dates studied. No strong trends were noted for intake-discharge. The lack of apparent CCPD at intake-discharge was probably a result of varying station power levels and subsequent AT's. Significant diel zooplankton population density changes were documented in the intake canal on 9 and 10 August 1976, at Stations 509 and 509.5. Several explanations were explored to explain these findings including vertical migration and horizontal plankton patchiness. Patchiness of this plankton as influenced by the synergistic action of light, phototaxic . responses, Langmuir spirals and the hydrodynamics of Lake Keowee as influenced by Jocassee Hydro were believed to be the primary factors causing the diel population changes in the intake canal. For future studies with similar objectives, it is recommended that the time interval between samples be lessened to 2 or 3 hours. The station by the skimmer wall should be eliminated and more effort directed toward the task of defining the diel patterns of zooplankton passing through the CCW system of Oconee by sampling only at Station 509.5 in front of the intake structure. Results indicated that the stain technique was not suitable for mortality determinations in Lake Keowee.
-
1.5-11 ONS 12/76
LITERATURE CITED Benda, R. F., J. Gulvas, and T. Neal. 1975. Effects of condenser passage on alge.1 primary productivity. Proc. Indiana Acad. Sci. 84:85-88. Duke Power Company. 1973a. Appendix B to Facility Operating License Nos. DPR-38, DPR-47, and DPR-55, Technical Specifications for the Oconee Nuclear Station Units 1, 2, and 3, Duke Power Company. U. S. Atomic Energy Commission, Docket Nos. 50-269, 50-270, and 50-287 (revised August 1, 1975, NRC), Washington, D. C.
. 1973b. Oconee Nuclear Station. Semi-Ahnual Report, ,
Period Ending June 30, 1973.
. 1973c. Oconee Nuclear Station. Semi-Annual Report, Period Ending December 31, 1973.
.
1974a. Oconee Nuclear Station. Semi-Annual Report, Period Ending June 30, 1974.
. 1974b. Oconee Nuclear Station. Semi-Annual Report, Period Ending December 31, 1974.
. 1975a. Oconee Nuclear Station. Semi-Annual Report, Period Ending June 30, 1975.
. 1975b. Oconee Nuclear Station. Semi-Annual Report, Period Ending December 31, 1975.
Cassie , R. M. 1961. The correlation coefficient as an indix of ecological affinities in plankton populations. Memorie Ist. Ital. Idrobiol. 13:151-177. Comita, G. W. and J. J. Comita. 1957. The internal distribution patterns of a calanoid copepod population and a description of a modifed Clarke-Bumpus plankton sampler. Limnol. Oceanogr. 2:321-332. Keppel. G. 1973. Design and Analysis, A Researcher's Handbook. Prentice-Hall, Inc., Englewood Cliffs, N. J. 658 p. Lilliefors, H. W. 1967. On the Kolmogorov-Smirnov test for normality with mean and variance unknown. Am. Stat. Assoc. J. 62:399-402. McNaught, D. C. and A. D. Hasler. 1961. Surface schooling and feeding behavior in the White Bass, Roccus chrysops (Rafinesque), in Lake Mendota. Limnol. Oceanogr. 6:53-60. Miller, M. C., G. R. Hater, T. W. Federle, and J. P. Reed. 1976. Effects of power plant operation on the biota of a thermal discharge channel,
- p. 251-258, In: Thermal Ecology II. G. W. Esch and R. W. McFarlane, eds.
ERDA Conf-750425, 404 p. 1.5-12 ONS 12/76
.
.
Table 1.~5-1 Summary of phytoplankton community densities (X10 units /n ) and blevolumes (ma /m ) in the CCW system at DNS,1976 May 11 July 10 September 15 November 10 Mean Station January 14* March 17 DENSITIES 120 93 350 251 326 226
' Intake 530.0 214 176 156 488 299 -- 280 Precondenser 530.3 283 128 505 290 252 258 Postcondenser 530.6 240 132 189 153 374 347 176 236 Discharge 530.9 176 w
- B10 VOLUMES
.w 123.2 189.6 95.0 50.5 100.7 78.3 225.0 . h: Intake 530.0 114.7 98.0 176.2 195.3 --- 162.7 Precondenser 530.3 229.4 104.8 68.2 111.6 174.1 189.7 138.7 Postcondenser 530.6 183.6 69.6 76.0 98.6 153.2 123.8 105.5 Discharge 530.9 111.8
- Values for January are averages of duplicate samples.
E, u 21
.
_
s
. _ . .
Odum, E. P. 1971. Fundamentals of Ecology. W. B. Saunders Co., 3rd Ed. Philadelphia. 574 p. Ragotzkie, R. A. and R. A. Bryson. 1953. Correlation of currents with the distribution of adult Daphnia in Lake Mendota. J. Mar. Res. 12:157-172. Stavn, R. N. 1971. The horizontal-vertical distribution hypothesia: Langmuir circulations and Daphnia distributions. Limnol. Oceanogr. 16(2):453-466. Steele, R. G. D. and J. H. Torrie. 1960. Principles and Procedures of Statistics. McGraw-Hill Book Company, New York. 481 p.
.
Sokal, R. R. and F. J. Rohlf. 1969 Biometry. W. H. Freeman and Company. San Francisco. 776 p. Tonolli, V. 1949. Struttura spaziale del popolamento mesoplanctico. Eterogeneita delle densita dei popolamenti orizzontalie sua variozione in furzione della quota. Mem. Ist. Ital. Idrobiol. 5:191-208.
. 1958. Richerche sulla microstructura di distribuzione dello zooplankton net Lago Maggiore. .Mem. Ist. ital. Idrobiol. 10:125-152.
i e 1.5-13 ONS 12/76
- . _ _
-
- . _ _ _ __ . - .
Table 1.5-2 Total chlorophyll concentrations (ma/m ) in the CCW system at ONS,1976. Station Replicate January 14 March 17 May 11 July 8 September 15 November 10 Hean 1steke (530.0) A 1.19 1.13 1.01 0.77 1.17 0.64 B 1.27 1.80 0.91 0.52 1.02 0.55 Hean 1.23 1.46 0.96 0.64 1.10 0.60 1.00 Pre-condenser (530.3) A 1.32 1.C4 0.80 0.76 1.19 Unit I reactor was B 1.08 0.98 0.90 0.73 1.20 down . ' Mean 1.20 1.01 0.85 0.75 1.20 1.00 $ Past-condenser (530.6) A 0.91 1.04 1.00 0.52 , 1.64 0.75 B 1.21 0.98 0.86 0.57 1.46 0.93 Mean 1.06 1.01 0.93 0.55 1.55 0.84 0.99 Dircharge (530.9) A 0.86 1.31 1.06 0.77 1.20 0.60 B 0.77 1.40 0.99 0.82 1.11 0.69 Mean 0.82 1.36 1.02 0.60 1.16 0.64 0.97 Mean 1.08 1.21 0.94 0.68 1.25 0.69
.
. _ . _ . _ _ _ . _ _ - _ . _ __ .-. _
Table 1.5-3 s
'
Analysis of variance (ANOVA) of phytoplankton density, blevoltane, and chlorophyll measurements from four CCW stations at ONS 1976.
- MS F Frobability Duncan's Range Test of Means di SS Source 3 8"986.5 2995.5 0.22 N.S.*
Density among stations Among dates within stations (error) 20 268447.0 13422.4 Total 23 277433.0
<
g F.025 (3.20). 3.86 4 o e 11651.2 3883.7 1.46 N.S.* 4 sinvolume anung stations 3 s 20 53374.2 2668.7 L Among dates within stations (error) Total 23 65025.4 5 2.4552 0.4910 27.58 <0.001 C41orophy11 among dates Sep hr Jan May Nov Jul 3 0.0187 0.0062 0.35 N.S.* Among stations 15 0.9529 0.0635 3.57 <0.005 1.25 1.21 1. 94 0.69 0.68 Dates a stations (interaction)
- 0.4272 0.0178
- Error 24 e <
47 3.854 E $ Total 2 o. F.025 (5,24)" 3*II' F.001 (5.24)= 5.98 F.025 (3.24)= 3.72. F.005 (15.24)= 3.25 0 2 Analysis of simple main effects of dates (D) for four chlorophyll stations MS F Frobability Source. .di SS 5 1.14 0.228 12.81 <0.05 D at intake 0.53 0.106 5.96 <0.05 D at precondenser 5 1.08 0.216 12.13 <0.05 D at post condenser 5 0.69 0.1 38 7.75 <0.05 D at discharge 5 Error, 24 0.0178 o E
3 e *Non Significant i
-
- l
_ _ _ _ . _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ . . _ . _ .
_ _ - _ _ _ _ . _ . . _ _ , _ . . . _ . _ __ _ . . _ _ . _ ._ . . _ . _ . __ . . . . . . . _ . . - _ 1able 1.5-4 Phytoplankton metabellem data for light-dark bottle incubations at ONS. 1976 January 14 March 17 May 11 July 8 September 15 November 10 Sample Placement Replicate CU AR CU AR CU AR CU 1 CU AR CU AR Intake at lower MIT 1 0.98 0.82 1.55 1.37 1.56 1.54 0.57 0.74 1.10 0.94 2.66 4.16 2 1.13 0.89 1.61 0.89 1.32 1.45 0.16 0.30 1.26 1.23 2.55 4.63 Intake at higher MIT 1 0.94 0.7) 1.52 1.35 1.00 1.59 0.44 0.57 0.63 0.54 2.39 3.74 2 0.98 0.77 1.60 0.89 1.25 1.37 0.30 0.57 0.74 0.73 2.61 4.75 Precondenser at lower HIT 1 1.04 0.79 0.81 0.78 1.18 1.48 0.62 0.81 1.83 1.54 -- - 2 0.63 0.58 0.76 0.78 1.36 1.51 0.22 0.30 1.48 1.23 - -
- '
Precondenser at higher ttIT 1 1.25 0.95 1.02 0.98 1.27 1.59 0.28 0.36 1.39 1.17 - - 2 0.55 0.51 1.01 1.03 1.18 1.31 v.38 0.53 0.98 0.82 -- -- Postcondenser at lower illT 1 0.84 0.93 1.05 1.01 1.29 1.29 0'.55 1.06 0.55 0.90 2.19 2.92 2 1.27 1.05 1.16 1.18 1.32 1.53 0.38 0.67 1.00 0.68 2.08 2.24 Y Postcondenser at higher IllT 1 0.72 0.79 1.65 1.59 1.31 C 1.31 0.41 0.79 C.71 0.44 2.45 3.27 2 1.32 1.09 1.22 1.25 1.23 1.43 0.23 0.40 0.58 0.40 2.32 2.50 Discharge at lower !!!T 1 0.71 0.83 2.31 1.76 1.96 1.85 1.09 1.41 2.34 1.95 2.29 3.82 2 0.71 0.92 2.90 2.08 1.86 1.88 1.06 1.29 2.06 1.86 1.% 2.84 Discharge at higher IIIT 1 0.90 1.04 2.12 1.62 1.89 1.79 0.40 0.52 1.85 1.54 2.14 3.56 2 0.82 1.07 2.36 1.69 1.85 1.87 0.51 0.63 1.93 1.74 2.20 3.18 Lower PitT 10.9 11.6 14.4 17.7 23.8 17.3 tilgher MIT 20.8 18.9 21.3 26.9 30.6 23.1 At, c' 9.9 7.3 6.9 9.2 6.8 5.8 8
.
U 3 MIT - Hean incubation temperature in water baths. C.
- CU - Carbon uptake rate, og carbon /m3/hr.
AR - Assimilation ratio of enclosed phytoplankton, mg carbon /ag chlorophyll /hr.
.
.
G 4
-- - . - - - _ . -.
..
Table 1.5-5 Results of Analysis of Variance expressed as an effect attributed to entrainment of Lake Keowee Phytoplankton at ONS,1976. Effect Thermal Mechanical Total CCW l AR CU AR CU AR Date CU January 14 March 17 44% S*** 24% S*** 42% S*** May 11 31% S** 30% S** 22% S*** 7 y July 8 5 September 15 41% I** 176% S** 158% S*** 51% S*** 17% I* 13% 1*
,
November 10 ,
,
_
- CU - carbon uptake, mgC/m /hr.
AR - assimilation ratio, agC/mg chlorophyll /hr. S - stimulation of phytoplankton metabolism I - inhibition of phytoplankton metabolism
* - significance probability,
"
<0.1
* * - " , <0.05 g *** _ " " ., <o,01 un
'O
- r e
e
= __ .- - ._ .
Table 1.5-6 Standing crops (no./ liter) of major zooplankton taxa in the intake canal at different sampling times on 9, 10 August at Stations 509.0 (near the skimmer wall) and 509.5 (near the intake structure). STATION Rotifera Cladocera Copepoda Total Crustacca Total Zooplankton 509 09 Aug 76 1430 0.3 4.3 3.9 8.2 8.5 1830 1.8 9.2 26.4 35.5 37.3 2230 2.8 2.6 8.9 11.5 14.3 i
'
10 Aug 76 0230 * * * *
- 0630 4.7 3.9 14.0 18.0 22.7
, 1030 1.6 6.9 13.4 20.4 22.0 I
5' 509.5 09 Aug 76 1430 4.4 21.4 37.7 59.2 63.6 1830 3.3 7.8 6.0 13.9 17.2 2230 3.7 6.5 13.0 19.4 23.1 10 Aug 76 0230 5.4 2.9 7.1 9.9 15.3 0630 5.1 3.1 9.0 12.1 17.2 1030 2.6 4.9 7.8 12.7 15.3 0 m
- r.
- Sample not preserved Z
e
.
, - - ,
_ _ _ _ _ . _ ._ __ _ _ _ . . . . _. Table 1.5-7 Transformations (log 10) fZ Pl ankton standing crops (#/ liter) and the standard deviation (S) of three replicate samples in the intake canal on 9, 10 August 1976, for the major zooplankton taxa. log 10 4 log 10 3 10810 4 10810 5 Station Date Time 0.622 0.142 0.586 0.034 0.926 0.080 509 09 Aug 76 1430 0.460 0.151 0.098 0.961 0.041 1.414 0.099 1.569 0.069 1830 1.248 0.063 1.428 0.156 0.419 0.037 0.946 0.045 1.152 2230
* * * * *
-* *
- 10 Aug 76 0230 0.046 1.666 0.058 0.589 0.088 1.146 0.046 1.354 '
0630 0.055 1030 1.204 0.109 0.831 0.103 1.127 0.045 1.341
,
.
F 0.102 1.319 0.115 1.566 0.124 1.795 0.105 509.5 09 Aug 76 1430 0.636 0.068 0.864 0.190 0.758 0.169 1.213 0.155 1830 0.506 ,' 0.568 0.024 0.812 0.029 1.111 0.043 1.365 0.015 2230 0.078 0.446 0.126 0.821 0.185 1.172 0.129 10 Aug 76 0230 0.725 0.703 0.051 0.485 0.096 0.046 0.102 1.230 0.079 0630 0.415 0.017 0.657 0.211 0.882 0.109 1.174 0.116 1030
- Sample not preserved
-
O~ w 3
- I
. _ _ _ . _ - . . . . -- -
s Table 1.5-8 Results of One-Way Analysis of Variance, and Duncan's New !!ultiple-Range Test for the major taxonomic categories. ONE-WAY ANALYSIS RESULTS OF DUNCAN'S TAXONOMIC OF VARIANCE RESULTS MULTIPLE RANCE TEST STATION . CATEGORY df F-ratio (a = 0.01)
-509' Total Rotifera 4 42-567* 0630, 2230> 1430 2230, 1830, 1030< 1430 Total Cladocera 4 16.352* 1830> 1430, 0630, 2230 1030> 0630, 2230 Total Copepoda 4 82.086* 1830> 0630, 1030, 2230> 1430 Total Crustacea 4 40.732* 1830> 1030, 0630> 2230, 1430 7
L Total Zooplankton 4 43.188* 1830> 0630, 1030> 2230, 1430
'509.5' Total Rotifera 5 10.469* 0230, 0630> 1830> 1030 1430> 1030 Total Cladocera 5 15.392* 1430> 0630, 0230 1830> 0230 Total Copepoda 5 15.426* 1430> 2230, 0630, 1030, 0230 2230> 1830 Total Crustacea 5 14.401* 1430> 2230> 1830, 1030, 0630, 0230 O
un
~ Total Zooplankton 5 14.525* % 1430> 2230, 0630, 1830, 1030, 0230
- Highly significant-(p = 01)
.
- -- --_- _ _ _ _ - _ _ _
.
Table 1.5-9 Standing Crop, Percent of Taxa, and Percent of Total Zooplankton Data for the Predominant Taxa at Station 509.5. Time 1430 1830 2230 0230 0630 1030
% 1 1 1 Z % 2 2 % 2 x No/1 Tama Total No/1 Taxa Total No/1 Taxa Total No/1 Taxa Total No/1 Tasa Total No/1 Taxa Total ROTIFERA
- 2. 0(1 45.4 3.1 0.87 26.4 5.1 1.10 29.7 4.8 1.98 36.7 12.9 1.96 38.4 11.4 1.03 39.6 6.7 retlicottia bostoniensis Collotheca spp. 0.56 12.7 0.9 0.71 21.5 4.1 0.84 22.7 3.6 1.17 21.7 7.6 0.73 14.3 4.2 0.37 14.2 2.4 conochttus unicornis 0.54 12.3 0.8 0.87 26.4 5.1 0.93 25.1 4.0 0 80 14.8 5.2 0.89 17.4 5.2 0.44 16.9 2.9 Conochiloides spp. 0.59 13.4 0.9 0.35 10.6 2.0 0.41 11.1 1.8 0.63 11.7 4.1 0'.51 10.0 3.0 0.39 15.0 2.5 CIAlhYERA Bossina coreroni 19.2 89.7 30.2 7.2 92.3 41.9 5.7 87.7 24.7 2.6 89.6 17.0 2.7 87.1 15.7 4.5 91.8 29.4 1.5 0.4 0.1 3.4 3.2 4.1 y Daphnia laevis 0.6 2.6 0.9 0.1 1.3 0.6 0.1 0.6 0.1 0.6 0.6 0.2 0.2 4.1 1.3 1.3 y Diaphanosoma leuchtenbcratanum 1.2 5.6 1.9 0.5 6.4 3.0 0.7 10.8 3.0 0.2 6.9 1.3 0.1 3.2 COPEPODA Tropocyclops prasinus 0.2 0.6 0.3 0.2 3.3 1.2 0.2 1.5 0.9 0.2 2.8 1.3 0.1 10.0 0.6 0.3 3.8 2.0 Mesocyclops edan 2.8 7.4 4.4 0.0 0.0 0.0 1.1 8.5 4.8 0.5 7.0 3.3 0.5 5.5 2.9 0.1 1.3 0.6 Diantomus mississipotensis 14.0 37.1 22.0 0.3 5.0 1.7 1.6 12.3 6.9 0.9 12.7 5.9 0.6 6.7 3.5 0.4 5.1 2.6 nauplii 7.9 21.0 12.4 2.9 48.3 16.9 4.1 31.5 17.7 3.2 45.1 21.0 4.8 53.3 27.9 4.4 56.4 28.8 copepodida 12.8* 34.0 20.1 '2.5 ~41.7 14.5 5.9 45.4 25.5 2.3 32.4 15.0 3.0 33.3 17.4 2.6 33.3 17.0
. o ut (n F* . M N N 0% o a . 4
--. ~ - . -. - ~. - . - _ . _ _ . . - . _ ~ . . - _ _ -- __. __-. - - ..
l _ Table 1.5-10 Standing Crop, Percent of Taxa, and Percent of Tota; Zooplankton Data for the Predominant Taxa at Station 509. Time 1430 1830 2230 0630 1030
% 1 1 % 1 1 % 1 No/1 Taxa Total No/I Taxa Total No/1 Taxa Total No/1 1
Taxa Total No/1 ' Taxa Total ., ROTIFF.RA Kellicottia y stollensis 0.20 73.3 2.6 0.6 36.1 1.7 0.9 32.1 6.3 1.8 39.6 8.2 0.75 Collotheca spp. 0.01 46.9 3.4 3.3 0.1 0.2 15.0 0.7 0.3 12.1 2.4 0.5 11.9 2.5 0.09 5.6 0.4
- Conochilus _ unicornis 0.05 16.7 0.6 0.1 7.8 0.4 0.5 20.7 4.1 0.7 16.2 3.3 p>nochiloides spp. 0.23 14.4 1,0 0.03 0.,11 0.4 0.A 26.7 1.3 0.6 24.3 4.8 0.7 15.3 3.2 0.34 21.2 1.5 CtaDorERA Bosmina coregoni 4. 0 - 93.0 47.1 8.3 90.2 22.2 2.3 88.5 16.1 Daphnia laevis 3.1- 79.5 13.6 6.0 87.0 27.3 0.1 2.3 1.2 0.3 3.3 0.0 0.1 3.8 0.7 0.3 7.7 1.3 0.1 1.4 Diaphanosoma leuchtenberaianum 0.2 4.7 2.4 0.5 0.4 4.3 1.1 0.1 ".8 0.7 0.3
. .t-*
,
7.7 1.3 0.6 8.7 2.7
'Y N COPyroaA W Tropocyclops prasinus 0.1
,
2.6 1.2 0.3 1.1 .8 0.1 1.1 Meancyclops edax 0.7 0.2 1.4 0.9 0.2 1.5 0.9 0.0 0.0 0.0 ' 3.4 12.9 9.1 0.5 5.6
>
3.5 1.2 8.6 5.3 0.7 5.2 3.2 Diaptomus mississippiensis 5.1 2.4 0.2. 7.7 29.2 20.1 0.7 7.9 4.9 0.3 nauplit 2.1 1.3 2.6 19.4 11.9 2.1 53.8 24.7 4.2 15.9 11.3 4.8 53.9 33.6 7.4 52.9 32.6 5.9 44.0 copepodids 1.5 38.5 26.8 17.6 10.5 39.8 28.2 2.7 30.3 18.9 4.9 35.0 21.6 4.1 30.6 19.6 o
-2 to H
N
- N
%J 0%
- e
_ _ _ _ _ ____ _ _______. _
_ Table 1.5-11 Retention Times of Intake Canal (using Planimetering of Entire Canal) in Hours
.
At Elev. 800 At Elev. 795 l At Elev. 790 4 pumps / Unit x3 units (4,530 cfs) 6.4 5.5 4.7 3 pumps / Unit x3 units (3,972 cfs) 7.3 6.3 5.4 2 pumps / Unit x3 units (3,027 cfs) 9.6 8.3 7.0 1.5-24 ONS 12/76
.
.__
Table 1.5-12 A Comparison of Stain Technique and Immotility Analysis Results
- for Zooplankton Entrainment Studies
% Mortality Estimates Intake Discharge Taxon Analysis: Neutral Red Imotility Neutral Red Imotility Diaptomus mississippiensis 0 13 0 4 Calanoid copepodid 0 37 0 34 Tropocyclops prasinus 100 11 33 0 Cyclopoid copepodid 54 17 43 33
' Nauplii 29 7 18 4 , Bosmina coregoni 13 13 10 5 Diaphanosoma leutchenbergianum 0 17 33 71 1.5-25 ONS 12/76
1l Pam 0 $ aTEmD. mC0oo mO o. aU- a" gg e u 9 b 0 0 0 0 0 0 0 0 o. 6 5 1 0 8 7 3 2 1 1 1 1
, - _ - - - - _ -
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1.25- y 1.00- A ; d. O.75-0.50-o .
.
$ January March May i
i i i July September
- 14 17 11 November m 8 15 10 D'
- Figure 1.5-2. Ratios of average photosynthetic activity (mg carbon /mg chlorophy11/hr : mg carbon /
mg chlorophyll /hr) between selected light-dark bottle incubations of cooling water at ONS, 1976. Key: a thermal effect (heated intake efficiency: control intake efficiency) a; mechanical effect (heated discharge: heated intake)= 0; total CCW passage effect (heated discharge: control intake)O O.
.
_ _ . . _ _ _ _ _ _ _ _ _ _ _ _ _ . _ _ _ _ _ _ _ _ _ _ _ _ _ . _ _ _ _ _ - _ - - - _ - _ _ - - - - - - -
. . __ - - _ _ = _ _. -- _. .. - _ . . _ _ _ - . . . - . . .
_ s 60 - _ __ _ CLADOCERA w d -- COPEPODA
.
O CRUSTACEA 2 50 2_ t-z 4a, w _ u E w
.
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-
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1- - U i I l i e I JAN MkR MAY JUL SEP NOV 1976 , ' r' i gu re 1. 'n 't . Correc t eil Percent i minu t i l e ILit a for florning plus At ternoon Samples .it P re- contlense t l'os t --conilense r f or tiie Tlirc e M;i jor Teixonomic Ca t er,o r i er. . O z 7.
,== %
N 7 i 4
-
._.
.
UNIT 1 138~~
\ - - - - - STATION 3 \
< \
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$ 75
\ / \
p \ / \ Q \ / 3 % -1
< \
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. CC W -.
JAN MAR MAY JOL SEP NOV 14- PRE-CONDENSER-POSTCONDENSER
.- - - - INTAKE-DISCHARGE vs W 12-g -
.
O \ W \ o 10-- w _ O \
< \
e 8- g g f\
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.
SEP NOV 1976 Figure 1.5-4 AT in Centigrate Degrees and Percent Power Level in Megawatts Thermal. 1.5-29 ONS 12/76
. . ...
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ - _ - _ .. __ 90.0- - NAUPLil _ CALANOID COPEPODID 80.0- -
- - CYCLOPOID COPEPODID
-- . . . . . Di.iOMUS s MISSISSIPPIENSIS w;
70.0.. -
-
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.
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O.0 - - l a e a a a JA'N MAR MAY J0L ShP NdV 1976 1.'i- i. Co r rec i cal Percent immotile llata f or florn i sy; l' I n s Al t ernoon Simples at
'
3 l'i no s .
- 7. 1* c-contlenser - l'os t -contlense r for Major liepresen t a t i ves 01 tlu- (:o pe pott a .
T-0 6 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
- - - . _ - - . _ . _ . - _ . - . .. .. . _ . . . _ . -. ,
. .
N.O . .
.
e 0. _ _ ClAPHANOSCf.1A LEUCHTENBERGIANUM
.- - - SOSMINA COREGONI 70.0_g.
L."
.' '
.
'
' f C?.. d. 2 2 H 2 m 53.0-H
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-
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. . i JAN f.1AR MdY JU' L s
SE'P NOV . 1976 Figure 1.5-6. a Corrected Percent Immotile Data for Morning plus Afternoon Samples at z Pre-condenser.- Post-condenser for two major taxa of the Cladocera. to l W
,
w , N N
@
. 4
. _ _ . _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __ _ __ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ______ _ _ _ _ _ _ ___
_ _ - _ CLADOCEM
- COPEPODA CRUSTACEA SC --
w E F-o : 50.,-
$_
w / g eo- - U x
" \
~
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w U N w
= . .I < -
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w i
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" /
a s f,
, C ,
____-----W_
- ,
N ,
'
e g 9 1 e i JN Mk3 MkV JhL SEP NOV 1976 Figure 1.5-7. Corrected Percent Immotile Data for Morning plus Afternoon Samples at Intake - O
" Discharge for the Three Major Taxonomic Categories.
-
N N
- M o%
i
.
4
- - _ _ _ . - _ . - _ . - - - - - - - - -
_ _ _ _ _
.-. - -
2 COLLECTIVE CORRECTED COLLECTIVE CORRECTED COLLECTIVE CORRECTED
$ PERCENT IMMOTILE PERCENT IMMOTILE PERCENT IMMOTILE W 7 1' Y Y f U l l l e *
- i s s -
to 8
> > I
;-- ;-- >
3- -
.
" j f g I
=
>n mo f f i w I L, z a I Hm m" S I nm on f
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w mm > f
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l g - n g* u wa n a o I u ma , / o W n y / n n 3 m
,
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~ - - INTAKE - DISCH \RGE:
us w a__ m C v o w <%
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. 4 6 i APH 3 APR 6 APRS APR 14 1976 Figure 1.5-9. AT in Centigrade Degrees and Percent Power Level in Megawatts Thermal.
l 1.5-34 - ONS 12/76
! , ' l
.
-- _
CLADOCERA 15--
-- COPEPODA w
C -- CRUSTACEA JANU *.R Y F
< 1r-O k.
2 U e w L w b. . 3 G w
-j -.
_ - e _ 8 c_. _ _ _ _ _ _ _ _ _ --
~- -
' ' ' ,
INThKE ' PRE-CONDENSER 4 POST-CONDENSER DtSCHARGE 15- ., w 0
< ,
F MARCH 4 - 0 s IJ-- 2
$
m w A w D 8i- - r ' N 0 a /
----
~
~~ -
8 0- -
/g _-________._______-
.
i 1
'
INTAKE PRE-CONDENSER POST-CONDENSER DISCHARGE 15-- w 0
< .
k MAY O
- r. 10-.-
a w u
- E .
1 1 l w s-- ' 2
'/' \
2 ti I l __ 5 ' o u 0- -
- ~ ~ ~
C ' ' ~ ~__._ ~~ 1 f, '
'
INIAKE s' . l PR E-COND!'NSE R POST- CONDENSE R DISCHARGE Figure 1.5-10. Percent Damage for Morning plus Afternoon Samples for the Three Major Taxonomic Categories. 1.5-35 ONS 12/76
.
- - - CLA00CER A w 15.. - . _ rOPEPOD A 0 /N CRUST A",E A "E
/ N 2 N e NLY Q / N N
F- 1 __ f % 2 N W /
\
$ /
w / . w 5-. / - y ,
/ -- ~~
5 m __
-
-_
J 2 l,-- O ' i e t
' s s s INTAKE PR E- CONDENS E R POST-CONDENSER DISCHARGE 1!i-W 0
4 2 SEPTEMBER
' <
O g U-- Z w o W w
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INTkKE PRE -CONDENGER POST-CONDENSER DISCHARGE w is_ . 0 4 h NOVEMBER O F 10. . Z w o C w
'
I
- w 5- -
l
>
l G w 3 o U e_. C'N _ ______ ______ ___-____ _ _
,
- s. - _
,
_ __
-
,
t 9
,
l i a 4 ' INTAKE PdE-CONDEN0Eli POST-CONDENSER DISCHARGE Figure 1.5-11. Percent Damage for Morning plus Afternoon Samples for the Three Major Taxonomic Categories. 1.5-36 ONS 12/76
_ - - _ _ _____ __ _ __ -- PRE-CONDENSER POST - CONDENSE R
- - INTAKE- DISCHARGE 1C-.
O w F- CLADOCERA w 80 xs x < O < uC 5-- m ^
> P- -
\
g2 ,
/
s U w b -
'
.
a a 5 m
,
' s O 3__ - - -
'
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O t t t JN MkR MkY JbL SEP NbV w 13-- 2 6- COPEPODA W
.
80
=
O < s u Q m p 5--
> Z PU o cc UE s
,
i g , u - '
- 's ' :
_, _ _ _ _ _ __ _- - _, l
. ,
,
,
JNN MR MdY JbL SEP NbV 10-- W
> CRUSTACEA o ew la_
- x .*.
x& O" oO 5- . W F-
>P C$ .
l S j '5 '
- s O - 's o 0--
- - -
__ - ,- --
' ~ ~
.
- _ _
,
JNN MkR MkY JbL S$P NdV 107G Figure 1.5-12. Corrected Percent Damage for Morning plus Afternoon Samples for the Three Major Taxonomic Categories. 1.5-37 ONS 12/76
.
PRE-CONDENSER-POST-CONDENSER O U- _ _ _ _ INTAKE-DISCHARGE w bW w C c: < o CLADOCERA OO w p 5- - 2 EU - H U O c ~ . w J wo. -
, . . s
%
,
'
O - N O ' ' 0-
- APR 3 APR 6 APR 8 .APR 14
--
O 10- - w OW w C . . m < COPEPODA E l2 0 < U O W H 5-- 2z
& w U U w c:
$ %
'
C s "-% U s s '
- g. .
' . , " .
f i e f APR 3 AP'R 6 APR 8 APR 14 10-. O w Dw w C CRUSTACEA e5 ee O 4 o a 5 . m b 2e % ' ro 0 0; / w w %
/ s J O. / %
%
/ %
o 0- - APR 3 APR 6 APR 8 AP 14 1976 Figure 1.5-13. Corre:ted Percent Damage during the Special Study for Morning plus Afternoon for the Three Major Taxocomic Categories. 1.5-38 ONS 12/76
A CLADOCERA
**
, , COPE PODA
_ 40,_ CRUSTACEA
-
_ m .. e iS_ .. s 4 .. O F 10 ** z --
..
-
- y ..
-
.. -
?5_ .. -
_
.. .. _
7
*
..
..
- .*
.. .. 7 .. /
0 P; : _ .. . ., :: p .. c - ' '.'
.
502 502 509.5 509.5 509.5 509.5 10 S P-S BS B-S BS B- S 25 _ _ 4776 4776 4-3 76 4-6 76 4 8-76 _ 41476
.
un h
- iO __ -
..
-
..
15_, - .. m .. .. _a _
.. ..
s o *. .. - g iO _. .. .. - ..
-
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.. 7
.. _
.. - ..
__
.. ..
- , ..
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,-
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_
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-
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- ..
0- .. .. -. ..
-
- .. - .. -
o
- .. $ .. -
- - :: - .. -
..
..
y 502 502 509.5 509.5 509.5 509.5 10 S BS BS B-S BS BS y 4 776 4776 4-3-76 4-6-76 4 8-76 4 14-76 %
- Figure 1.5-14. Percent Immotile and Percent Damage for Open 1.ake (502) and intaha (509.5).
l
.
!
_ _____ _ - _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ -_
4
- : ST ATION 509 O ---- - --- - - - -- e S T A T I O N 509.5 70 70 _ .
_, Q 60
,60 --
--
g
-
3
- '.
i g _50 . ', w 50 -- I c ', - w ,
'40 .. i e 40_.
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1.6 PLUME MAPPING FOR TEMPERATURE AND DISSOLVED OXYGEN Specification: At least four times per year, special sampling studies shall be made to identify and characterize the cooling water discharge plume with respect to dissolved oxygen and temperature. Data shall be collected from a minimum of 1 30 sampling points, following a sampling pattern designed to achieve coverage of the plume. Three of the surveys shall be conducted during periods when the following conditions are expected: -
- 1) Maximum condenser cooling water discharge temperature
- 2) Maximum acreage of discharge plume
- 3) Minimum condenser cooling water dissolved oxygen con-centration.
(Duke Power Company, 1973a). I. INTRODUCTION Plume mapping for 1976 consisted of six surveys. Surveys conducted on September 1, September 15, and October 6, were scheduled to satisfy condition 1 and condition 3 of the specification. Plume surveys conducted on March 11, November 18, and December -7, were scheduled to meet condition 2 of the specification. II. METHODS AND MATERIALS Temperature and dissolved oxygen (DO) measurements were obtained by an in-situ sonde; a description of this method was contained in the Water Quality Section of a previous ONS Semi-Annual Report (Duke Power Company, 1973b). Temperature and DO measurements were taken in a vertical profile starting one meter from the bottom. Temperature was determined to 0.1 C and D0 was determined to 0.1 mg/1. Stations for the surveys were located by visual alignment between established reference points. The majority of the reference points were located by survey crews by triangulation for placement on a map (Duke Power Company, 1973b). The remainder were visually located on a map. Figure 1.6-1 shows the locations of 50 stations. At least 47 of these stations were sampled during each survey. As data were collected and inspected, additional sample effort was shifted to various areas of the lake to achieve coverage of the plume. Interpretstion of Data Data for each plume survey were analyzed by the following method. Stations 1.6-1 ONS 12/76
which. comprised a lake transect were grouped together and data were averaged to obtain an average temperature and D0 value for each depth sampled at that transect (Figure 1.6-1). Isopleths were then drawn using the averaged temperature and D0 values (Figures 1.6 1.6-13). Since examination of the data indicated that the major extent of the thermal plume was in the Keowee River arm of Lake Keowee, data from the Little River arm were not used in these graphs but serve as supplemental data. For each survey, the average surface temperature for Stations 30, 31, and 32 was used as a reference temperature. Stations 30, 31, and 32 are located in the Keowee River arm 9 km from the ONS discharge and were chosen as a - reference since they were less influenced by the ONS discharge than any other stations sampled in that arm; and therefore, they should be a better approximation of the ambient temperature in that arm. These stations were usually warmer (0.5 C* to 2.0 C*) at the surface than Station 500.0. Using the surface temperature for each station sampled, and the reference temperature, isopleths depicting surface areas affected by the plume were constructed for each survey (Figures 1.6 1.6-19). Temperature and D0 isopleths that were previously included in the Water Quality Section of the Semi-Annual Report (Duke Power Company,1973b, c, 1974a, b; 1975 a, b) are included here as supplemental data (Figure 1.6 1.6-32). III. RESULTS AND DISCUSSION Data collected from each of the six plume surveys are presented in Appendix E, Tables E-1 thcough E-6. Temperature and DO isopleths are presented in Figures 1.6-2 through 1.6-32. The operation of Oconee Nuclear Station during 1976 resulted in displacing an average of 7.8 x 106 m 3 of water per day from near the bottom of the Little River arm of Lake Keowee to the upper strata (10m to surface) of the Keowee River arm of the lake (Section 1.1). Temperature elevations between the ONS intake and discharge sites ranged from 0.8 to 13.2 C'. The average temperature elevation for 1976 was 7.7 C . Discharge temperatures ranged from 10.4 C in February to 33.4 C in September (Section 1.1). Temperature data indicates that a large portion of the Keowee River arm was affected by the thermal effluent from ONS (Figures 1.6-21 through 1.6-32). Stations 508.5, 508.0, 505.0, 504.0 and 503.0 are all influenced by the thermal effluent. During stratification the intake of cool hypolimnetic water allows the discharge of condenser cooling water which is approximately r.he same temperature as the surface temperature at these stations (Figures 1.6-24 through 1.6-28), Under destratified conditions discernable tencera-ture gradients were noted between the surface temperatures at these stations and the discharge temperature (Fieures 1.6-21 through 1.6-23, and 1.6-29 i through 1.A-12). The submerged discharge of ONS allows rapid mixing and dilution of discharged water (Duke Power Company, 1973b). During destratified conditions, the 1.6-2 ONS 12/76
,
.
surface temperatures at Stations 508.5, 508.0, 505.0, 504.0, and 503.0 averaged only 3 C* to 5 C* above the surface temperature at Station 500.0. March 11 The first plume survey for 1976 was conducted on March 11. On that day, ONS operated at 65% of full capacity with condenser cooling water flows averaging 69% of the total possible flow. The maximum discharge temp-erature recorded during the March 11 survey was 20.0 C and the minimum recorded discharge D0 concentration was 9.8 mg/1. The plume remained in the top 5 m of the water column (Figure 1.6-2). Surface temperatures in the Keowee River arm were 0.5 C* or less above the reference temperature within 5 km of the ONS discharge (Figure 1.6-14). Approximately 4.8 km2 (6.5%) of the total surface area of Lake Keowee was affected by temperatures - of 0.5 C* or more above the reference temperature (Figure 1.6-14). September 1 On September 1, ONS operated at 86% of full capacity with condenser cooling water flows averaging 96% of the total possible flow. This operating cap-acity was the highest encountered during plume surveys conducted in 1976. The maximum recorded discharge temperature for September 1 of 31.5 C was 2.8 C* higher than the reference temperature. Due to this small temperature difference, the plume extent was minimal as Indicated in Figure 1.6-3. The 0.5 C' isotherm in Figure 1.6-15 encompasses a surface area of only 4.0 km2 (5.3%) of the total surface area of Lake Keowee. The minimum condenser cooling water DO concentration of 4.7 mg/l recorded on September 1 was the lowest condenser cooling water DO concentration recorded for the six surveys. The 6.0 mg/l isoline in Figure 1.6-9 surfaces approximately 3.3 km from the discharge. D0 values averaged 7.2 mg/l at the reference stations (9 km from the ONS discharge). The lowest discharge DO concentration recorded for the weekly DO monitoring program (Section 1.3.1, Specification A continued) was 4.3 mg/l and was recorded on August 19. Since this value was recorded prior to the September 1 plume survey, a DO isopleth from the synoptic water quality survey (Section 1.3.1, Specification A) for August is included (Figure 1.6-20). Values for discharge DO concentrations of 4.8 mg/l for August 5, and 4.5 mg/l for August 12 were recorded for the weekly DO monitoring program (Section 1.3.1, Specification A continued). The synoptic water quality data was recorded on August 9 and indicates that the discharge of such DO concentrations appears to havr negligible effects on the receiving water body.since surface DO concentrations of 6.0 mg/l or less were only recorded in the Keowee River arm within 3 km of the discharge (Figure 1.6-20). September 15 On September 15, ONS operated at 83% of full capacity with condenser cooling water flows averaging 98% of the total possible flow. These were the highest average flows recorded during plume surveys conducted in 1976. 1.6-3 ONS 12/76
.
__
The maximum discharge temperature recorded during plume surveys for' 1976 was 31.9 C and was recorded during both the September 15 and October 6 plume surveys. These two surveys bracket temperatures recorded on September 25 when the maximum discharge temperature (33.4 C) was recorded for the condenser cooling water temperature monitoring program (Section 1.1). More surface acreage was affected by the plume on September 15 than for any other plume survey conducted during 1976. The plume affected the Surface temperatures in the Keowee River top 11 m of the water column. arm were 0.5 C' or less above reference at a distance of , discharge. Approximately 10.6 km2 (14.3%) of the surface area of Lake Keowee was affected by temperatures of 1.0 C" or more above the reference temperatures (Figura 1.6-16) . Due to a malfunction in the D0 subsystem of one instrument on Septemoer 15, DO was not measured at every sampling station where temperature was measured. The minimum discharge DO concentration recorded for that day was 4.9 mg/1. Surface concentrations of 6.4 mg/l were recorded less than
0.5 km from the discharge indicating only minimal effects were noted by discharging water containing low concentrations of DO.
October 6 During the October 6 plume survey ONS operated at 66% of full capacity with condenser cooling water flows averaging 69% of the total possible i flow. The reference temperatures for the October 6 survey was 0.7 C* 1ess than that for September 15 although the maximum recorded discharge temp-erature of 31.9 C was the same. The majority of the plume remained in the top 8 m of the water column (Figure 1.6-5) . Surface temperatures of 0.5 C* or less above the reference temperature were recorded in the Keowee River arm 6.5 km from the ONS discharge. The 0.5 C* isopleth in Figure 1.6-16 encompassed approximately 13.62km (18.3%) of the total surface area of 1 Lake Keowee. l Due to a malfunction in the D0 subsystem of one instrument on OctoberThe 6, DO was not measured at all stations where temperature was measured. minimum recorded discharge DO concentration of 6.0 mg/l did not extend far into the receiving waters (Figure 1.6-11). Surface DO concentrations of 7.0 mg/l were recorded within 1 km of the ONS discharge. November 18 During the plume survey conducted on November 18, ONS operated at 86% of full capacity with condenser cooling water flows averaging 85% ofDue the to the maximum possible flow. Windy conditions prevailed on that day. inability to maintain the boat on station, sampling was concentrated in the top 10 m of the water column. The majority of theAsplume remained indicated in Figure in the top 8 m of the water column (Figure 1.6-6). 1.6-18 surface temperatures in the Keowee River arm 5 km from the discharge2 were 0.5 C* or less above the reference temperature. Approximately 6.0 km 1.6-4 ONS 12/76
! (8.0%) of the total surface area of Lake Keowee was affected by tempera-tures of 0.5 C* or more above the reference temperature (Figure 1.6-18) . The minimum discharge D0 concentration for November 18 was 8.2 mg/1. Values of 8.6 mg/l were recorded 0.7 km from the discharge and 8.8 mg/l was recorded 9 km from the discharge. December 7 During the plume survey conducted on December 7, ONS operated at 55% of full capacity with condenser cooling water flows averaging 62% of the maximum possible flow. The maximum discharge temperature recorded was 22.7 C and the minimum DO concentration was 9.0 mg/1. The majority of the , plume remained within the top 10 m of the water column (Figure 1.6-7). Surface temperatures in the Keowee River arm were 0.5 C* or less above the reference temperature within 5 km of the ONS discharge. The 0.5 C* isotherm in Figure 1.6-19 encompasses approximately 9.0 km2 (12.1%) of the total surface area of Lake Keowee. Surface isopleths (Figures 1.6-14 through 1.6-19) indicate that the direction of the discharge plume for the six surveys was similar. The plume flowed toward the west bank of the discharge cove and then changed course flowing northward out the Keowee River arm. The extent of the plume through the connecting canal was minimal or nonexistent during the surveys for 1976. Surface isopleths indicate only small areas in the Little River arm of the lake were affected by temperatures 0.5 C or less above the reference temperature. IV.
SUMMARY
AND CONCLUSIONS l During 1976 the operation of ONS displaced an average of 7.8 x 10 6m3 of ! water per day from the bottom of the Little River arm of Lake Keowee to the , upper strata of the Keowee River arm of the lake. Temperature elevations between the intake and discharge averaged 7.7 C* while discharge temperatures l ranged from 10.4 C to 33.4 C. Temperature data indicates that Stations 508.5, 508.0, 505.0, 504.0, and 503.0 were influenced the most by the ONS discharge. These stations had surface temperatures approximately the same as the discharge temperature when the lake was stratified and surface temperatures of 3 C* to 5 C* above the surface temperature at Station 500.0 during destratified conditions. The maximum condenser cooling water discharge temperature recorded during the plume surveys conducted in 1976 was 31.9 C and was observed on September 15 and October 6. This was only 2.9 and 3.5 C* higher than the l respective reference temperatures recorded for those days. l The maximum acreage of discharge plume was observed during the September 15 survey. The majority of the plume remained within the top 11m of the water column. Surface temperatures on September 15 in the Keowee River arm were 0.5 C* or less above the reference temperature within 7 km from the ONS discharge. Approximately 10.6 km2 (14%) of the surface area or Lake Keowee was affected by temperatures of 1.0 C' or more above the reference temperature (26.6 C). 1.6-5 ONS 12/76
The minimum condenser cooling water DO concentration recorded during the six plume surveys was 4.7 mg/l and was observed on September 1. Due to rapid mixing and dilution in the discharge cove the effect of discharging water containing low concentrations of DO was minimal. Values of 6.0 mg/l were recorded in the Keowee River arm within 3.3 km from the ONS discharge. Surface isopleths for the plume surveys conducted during 1976 indicate that the extent of the plume in the Little River arm was minimal. During all of the surveys the plume moved along the west bank of the discharge cove and then flowed northward out the Keowee River arm.
.
LITERATURE CITED Duke Power Company. 1973a. Appendix B to Operating License Nos. DPR-38, DPR-47, and DPR-55, Duke Power Company. U. S. Atomic Energy Commission, Docket Nos. 50-269, 50-270, 50-287 (revised August 1, 1975, NRC), Washington, D. C.
. 1973a. Oconee Nuclear Station. Semi Annual Report.
Period Ending June 30, 1973.
. 1973b. Oconee Nuclear Station. Semi Annual Report.
Period Ending December 31, 1973.
.
1974a. Oconee Nuclear Station. Semi Annual Report. Period Ending June 30, 1974.
. 1974b. Oconee Nuclear Station. Semi Annual Report.
Period Ending December 31, 1974.
.
1975a. Oconee Nuclear Station. Semi Annual Report. Period Ending June 30, 1975.
.
1975b. Oconee Nuclear Station. Semi Annual Report. Period Ending December 31, 1975.
.
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O i I i i 2 i i 3 i f 4 i i I 5 i i I 6 i i lii 7 8 i i FIGURE : I.6-13 9 DISTANCE FROM THE DISCHARGE (KILOMETERS) OCONEE NUCLEAR STATION PLUME MAPPING STUDY DATE : 12-7-76 PARAMETER : DISSOLVED OXYGEN (mg/l )
*
. _ _ _ . . _ _ _ _
c' REFERENCE TEMPERATURE
- O
# 0 S ,s 8 7 xM _
O
,
s, 9W 0.5 c* G I d ga
%,
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- J Ss o 4
e k gxM loc
- j s
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3 03 SURFACh {ThMP RE _ A f u o i 2 1 0 1.0C*-1.3kmf-1.8% SCALE IN K tLOMETERS 0.5 C* - 4.8 km' - 6.5% %g DATE: 3/11 / 7 6 OCONEE NUCLEAR STATIO N PLUME MAPPING STUDY C* ABOVE REFERENCE l ONS 12/76 l FIGURE'. I.6-14 1.6-20
REFERENCE TEMPERATURE 28.7C *
- O
+* O I
% to 3 '
R E .. 7KM C D 0 " KM n 0 V a
'l 0
4 3 KM
,
*
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- KE0 WEE DAM
'
l 4C N O O SC GE f TEMPERATURE
\ m, 2
1.5 C* - 0.2 km - 0.3% 'k 1.0 C* - 0.5 km2 - 0.7% 3 0 1 2 0.5 C* - 4.0 km - 5.3% SCALE IN KILOMETERS
%o DATE: 9/ I /76 OCONEE NUCLEAR STATION l
PLUME MAPPING STUDY t C* ABOVE REFERENCE
~
FIGURE : 1.6- 15
- 0
'
REFERENCE TEMPERATURE 266C e , o G O r l a# s ,s
,
w 3 8 vgM N p
#
.
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tc;o KM O b o
,. l.5 C*
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.
2.5 2.0cc to KE0 WEE CAM - 1 #oC ' N E E TURE i , I 2.5C*-0.4kmj-0.5% " 2.0 C' - 3.7 km - 5.1% 2 1.5 C* - 8.3 km .,- 11.1% 1" 0 1 2 3 1.0 C* - 10.6 km' - 14.3% ?g SCALE IN KILCMETERS 1 t iTE: 9/IS/ 76 OCONEE NUCLEAR STATION PLUME MAPPING STUDY C' A BOV E REFERENCE
.GU RE : 1.6- 16 1.6-22 ONS 12/76
_ _ _ _ _ _____ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ . l
- i REFERENCE TEMPERATURE 25.9 o' '
o O
# 0 1
% =b .
/ 3 l
# !
8 7xM o : 0;5co (
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b N fM E URE 2.0 C* - 0.2 km2 - 0.3% 1.5 C' - 2.9 km2 - 3.8% $
. 13 6 km -1 3% 5
% l OATE. lO/6/76 l
l OCONEE NUCLE AR STATION I PLUME MAPPI N G STUDY l Co ABOVE REFERENCE I FIGUR E : 1.6- 17 1.6-23 ONS 12/76
i l
!
.
T4 c' REFERENCE TEMPERATURE n e+ 1 % b
?
#
8 7 KM o
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KEOWEE CtM 1 N h C 23 0C fE P R TURE
+
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" \
1.5 C* - 2.7 km2 - 3.6%
': : : :"b::: %
l DATE:ll/18/76 OCONEE NUCLEAR STATION PLUME MAPPING STUDY , C' ABOVE REFERENCE l FIGURE: 1.6 -18 1.6-24 ONS 12/76
_ _
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TE RE . . _ . _ . .. A*/ . L
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[ 0.5 C o OE DAM l b ts c f I!URE 4.0 C* - 0.1 km - 0.1% 3.0 C* - 0.6 km - 0.8% 2.0 C* - 2.4 kra - 3.3% P
-
k - 2 % DATE.12/ 7/76 OCONEE NUCLEAR STATION PLUME MAPPING STUDY C* ABOVE REFERENCE . FIGURE : 1.6- 19 1.6-25 ONS 12/76
i
.
-
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.
DISSOLVED OXYGEN CONCENTRATION (7'1Lt.! suns / LITER) RIVER KILOMETERS MbvE KEOVEE DAM - LAKE KEcVEE 08/09/75 STATION- 507 506 505 504 508 502 501 ECC
'
I
*
.
NU l I 1 2.5 5.0 ' 8. o , jj 3.0 {
,, g 7.5 7 .0 6 g
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15.0 [ 6. 0 & ; G / 4,0 17.5
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[ (f ~ _ 3.0 5 20.0 2.0 6 4,o 22.5 A j 25.0 3.0
- 2.0' f 27.5 1.0 30.0 32.5 N
35.0 37.5 l 4 40.0 0.0 2.5 5.0 7.5 10.0 12.5 15.0 20.0 17.5 15.0 12.5 10.0 7.5 5.0 2.5
~
RIVER KILOMETERS Figure 1.6-20 ! t.6 16 ONS i1/76
~
- -
-,
TEMPERATURE 'C RIVER KILOMETERS ABOVE KE0 VEE DAM - LAKE KE0 VEE 01/12/76 STATION- 507 506 505 504 508 502 501 500 l I SURFACE 2.5
'g 0
\ 16 0
'
I
- 5.0
'
'
, 13 0 10.0 12.0 12.5
- 15.0 0 V O 17.5
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s l2 5 5 20.0
$ 11.0 22.5 ll, g [
t 25.0
/
IOD 27.5 30.0 l 32.5 35.0 37.5 40.0 20.0 17.5 15.0 12.5 10.0 7.5 5.0 2.5 0.0 2.5 5.0 7.5 10.0 12.5 15.0 . RIVER KILOMETERS Figure 1.6-21 1.6-27 ONS 12/76
_ - - _ _ _ - - _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ l _ TEMPERATURE 'C RIVER KILOMETERS ABOVE KE0 VEE DAM - LAKE KE0 VEE i 02/23/76 scs 50+ soe 502 501 500 sTAttcp- 507 ses }
-
.
SURFACE 2.5 . 5.0 \ 7.5 B,0 4D
%_
l
._ ' 10.0 II,0
_ f 12.5
- 15.0 E
17.5 h20.0 g.D 9,0 b r 22.5 25.0 27.5 f 30.0 f , 32.5 35.0 37.5
.
40.0 20.0 17.5 15.0 12.5 10.0 7.5 5.0 2.5 0.0 2.5 5.0 7.5 10.0 12.5 15.0 i i
'
RIVER KILOMETERS Figure 1.6-22 l 1.6-28 ONS 12/76
-- . . . . . _ . ._ __..
. . . . .
,
TEMPERATURE 'C RIVER KILOMETERS A80VE KE0 WEE OAM - LAKE KE0 VEE 03/17/76 STAT 10N- 507 506 505 504 508 502 501 500
$URFRCE I
25 I IE 5.0 U (15.016- h 13.0 14.
,
10.0 1 12.5 i _ _ 15.0 m 12.0
\
1 13.0
-
f [ 5 12 0 h o 11.0 r 20 0 - 22.5 25.0
,
27.5 30.0 32.5 \ 35.0 k 37.5 40.0 20.0 17.5 15.0 12.5 10.0 7.5 5.0 2.5 0.0 2. 5 5.0 7.5 10.0 12.5 15.0 RIVER KILOMETERS Fi3 pire 1.6-23 1.6-29 ONS 12/76
~
.
1 m
- e -- . . .
TEMPERATURE 'C RIVER KILOMETERS ABOVE KE0 VEE DAM - LAKE KE0 VEE 04/12/76 504 506 502 501 500
- 507 506 505 5iAT!CW-
.
StW ACE 2.5 I&O 5.0 - i
'
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7'5 1 5. O~- - -- l _ 10.0 L A- 'O 12.5 15.0 g3
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22.5 25.0 , 27.5 10.0 30.0 32.5 35.0
l 37.5 40.0 20.0 17.5 15.0 12.5 10.0 7.5 5.0 2.5 0.0 2.5 5.0 7.5 10.0 l'. 5 15.0 R1VER KILOMETERS , F i gu r.: 1.6 .!a l 1.6-10 oNs 12/76
-
- =-
, I
.
TEMPERATURE 'C RIVER KILOMETERS ABOVE KE0 VEE DAM - LAKE KE0 VEE 05/10/76
'
STAT!ON- 507 506 505 504 508 502 501 500 l
.
I SURFACE g g y-
&
2.5 u 20.0 0 5.0 \_ - 19.0
I8W 10.0 _ N _
^ ' - l 7. O V b
,.
12.5 l s,0 g.O 15.0 / g a: 1
$ 17.5 !
5
'
0.0 4.0 -
,
22.5 j ~ 13 0 N N - 13.0 I 25.0 g O _- @' I 27.5 9 30.0 *N
'
'
32.5
/
35.0 37.5 l
'
40.0 20.0 17.5 15.0 12.5 10.0 7.5 5.0 2.5 0.0 2.5 5.0 7.5 10.0 12.5 15.0 RIVER KILOMETERS I i Figure 1.6-25 1.6-31 ONS 12/76
--. . . . _ . .-
TEMPERATURE 'C RIVER KILOMETERS ABOVE KE0 VEE CAM - LAKE KE0 VEE 06/14/76 l
! 501 500
- 50s 505 504 508 502 sinitoN. Su7
- !
t I NE ' 26.V '
,
\
2.5 p.O 50 A 22.0 ^ w 7.5
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=
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i 25.0
- 14. 0 27.5
'
I- . 30.0 32.5 35.0 37.5 40.0 - 10.0 7.5 5.0 2.5 0.0 2.5 5.0 7.5 10.0 12.5 15.0 , 20.0 17.5 15.0 12.5 i RIVER K!LOMETERS Fi).ure 1.5-lh
.
1.6-32 OSS 12/76 l __ _ _ _ _ _ _
-
___ . _. TEMPERATURE 'C RIVER KILOMETERS ABOVE KE0 VEE DAN - LAKE KEDVEE' 07/12/76 STATIED6- 507 506 505 504 500 502 501 553
.
2.5
'
Os [ ~
- 5. 0 2 4. 0 % .
(p 4.0 +_ _
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l'S
.
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-
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, 15.0 m
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-
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)
!
37.5 '
!
40.0 20.0 17.5 15.0 12.5 10.0 7.5 5.0 2.5 0.0 2.5 5.0 7.5 10.0 12.5 15.0 RIVER KILOMETERS Figure 1.6-27 , i.s-33 oss i2/7s !
- . . . . . . . .
-- -
.
.
_._ TEt1PERATURE 'C RIVER XILCMETERS ABOVE KEcVEE DAM - LAKE KE0 VEE 08/09/75 506 504 508 502 501 500 STATION- 507 506
** # 28.0 N-2.5 Y 5.0 ,
7.5 26.0 10 0 l l _ l 12.5 U 22.0 . _ _ 17.5 w [ 20.0 - f 20.0/ ( 22.O v s i; 22.5
\ 6-
-
25.0 27.5 p\ 6 e g/ _ t s,/ 30.0 g 4,0 g
,
_ t j 32.5 '
- I
- 35.0 i
37.5 l 40.0 2.5 C.0 2.5 5.0 7.5 10.0 12.5 15.0 20.0 17.5 15.0 12.5 10.0 7.5 5.0 RIVER KILCMETERS Figure 1.h-28 l.6- 34 ONS 12/76
'
. _ .
L
_ TEMPERATURE 'C RIVER KILOMETERS ABOVE KE0 VEE DAN - LAKE KE0 VEE 09/13/76 starIm . 507 50s 505 504 50s 502 501 500
-- -
SURFnCE 2.5 5.0 -
.
7.5 8.0h 10.0 260 4 12.5 u , 15.0 h 17.5 .0-_ - ___
, ! E #
5
'
20.0 I 22.5
'[
_
~240 25.0 27.5
~20.o C {
/
30.0 6-16.0 N 32.5
'
35.0 37.5 40.0 20.0 17.5 15.0 12.5 10.0 /.5 5.0 2.5 0.0 2.5 5.0 7.5 10.0 12.5 15.0 , RIVER KILOMETERS , , Figure 1.6-29 t l
*
- 1. 6-- Ti ONS 12/76
( l
--
, - - - - - - - -..~ _ ..-.. ._. . . . . _ . . . __ ,, _
--
-
T l TEMPERATURE 'C - RIVER KILOMETERS ABOVE KE0 VEE OAM - LAKE KE0 VEE 10/11/76 501 500 507 506 505 504 500 502 STATICN- . I SURFACE 2.5 26.0 5.0 7.5 24,0
) * '
10.0 12.5 m 15.0
$
N 17.5 W
-
5 20.0 b Q 22.5 22.0 /
-
'
25.0 ' 0 27.5 20.0 A J o.O 18.0 l 8.0 30.0 16.0 16 0 32.5
,
I
'
,
'5.0 .!
37.5 40.0 7.5 5.0 2.5 0.0 2.5 5.0 7.5 10.0 12.5 15.0 20.0 17.5 15.0 12.5 10.0 1 RIVER KILOMETERS ! Figure 1. 8 -- m l I . 6 - 16 ONS 12/76 ,
- - ~ ~ ~
.. ... . .-
_
__ TEMPERATURE 'C RIVER KILOMETERS A80VE KE0 VEE CAM - LAKE KE0 VEE 11/08/76 STRTI N- 507 506 506 504 500 502 501 500 sunrntc , 1 2.5 18 0
,
5'0
- 19. 0 170
~
- . :i 40.0 17.0 12.5 '
, 15.0 b ! '
+ 17.5 W
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-
l .
? (8.0 8
22.5 25.0 27.5
!
A I ', 0 35.0 37.5 l 40.0 1 20.0 17.5 15.0 12.5 10.0 7.5 5.0 2.5 0.0 2.5 5.0 7.5 10.0 12.5 15.0 RIVER KILOMETERS F l y,u ri- 1.6-31 1.6- 17 UNS 12/76
.
.- __
TEMPERATURE 'C RIVER KILOMETERS ABOVE KE0 VEE OAM - LAKE KE0 VEE 12/13/76 see sc2 so sm , stans. w sos sos so
'
l 2.5 l&O 13.0 15.0 ?
.0 l 14.0 I
\/ !
7.5 10.0 12.5
- 15.0 E
17.5
- 110 5 20.0 22.5 IIO
_l3. 25.0 27.5 30.0 32.5 i 35.0 ! l 37.5
'
i *f0.0 17.5 15.0 12.5 10.0 7.5 5.0 2.5 0.0 2.5 5.0 7.5 10.0 12.5 15.0 RIVER KILOMETERS , rigure i .6 81 . { oss i2ns . i .8- m
.
O
- __.
1.7 CAS BUBBLE DISEASE STUDY Specification: A. The fish collected as a part of the population dynamics study (1.3.2) shall be examined for symptoms of gas-bubble disease. Those fish which exhibit symptoms of gas-bubble disease shall be identified, weighed, and measured; this data plus the date and location of capture will be tabulated (Duke Power Company, 1973a). I. INTRODUCTION The relationship between gas-bubble disease and the operation of , steam electric stations has been discussed previously (Duke Power Company, 1973b). II. METHODS AND MATERIALS
.
the methods and materials used in monitoring gas-bubble disease in Lake Keowee fishes were presented in the Oconee Nuclear Station, Semi-Annual Report for the period ending June 30, 1973 (Duke Power Company, 1973b). III. RESULTS AND DISCUSSION Southeast Reservoir Investigations has not observed gas-bubble disease in Lake Keowee fishes for this reporting period. ! IV.
SUMMARY
AND CONCLUSIONS The lack of observed gas-bubble disease symptoms in Lake Keowee fishes to date indicates that the problem does not exist in the lake. . LITERATURE CITED Duke Power Company. 1973a. Appendix 3 to acility perating icense Nos. DPR-38, DPR-47, and DPR-55. Technical Specifications for the Oconee Nuclear Station Units 1, 2, and 3, Duke Power Company, U. S. Atomic Energy Comrission, Docket Nos. 50-269, 50-270, and 50-287 (revised August 1, 1975, NRC), Washington, D. C. Duke Power Company. 1973b. Oconee Nuclear Station. Semi-Annual Report, Period ending June 30, 1973. 1.7-1 ONS 12/76 4 0
1.7 CAS BUBBLE DISEASE Specification: B. Determination of the percent saturation values of the gases oxygen and nitrogen dissolved in Lake Keowee waters shall be made at $tations 502, 504, 505, intake structure, discharge structure, and discharge cove at depths of 1, 5, 10 and 20 feet. The study shall be perforged monthly during the winter period, November to April, starting in November, 1973 (Duke Power Company, 1973a). I. INTRODUCTION l - Supersaturation of dissolved gases has previously been found in the discharge of steam plants. A discussion of this phenomenon may be found in the ONS Semi-Annual Report for the period ending June 30, 1973 (Duke Power Company, 1973b). II. METHODS AND MATERIALS A discussion of the methods and materials used in this study for j January through December, 1976, may be found in the Oconee Nuclear Station Semi-Annual Report for the period ending June 30, 1974 l (Duke Power Company, 1974). III. RESULTS AND DISCUSSION The results of sampling during 1976 are summarized in Table 1.7-1 as dissolved gas concentrations (ml/l of oxygen and nitrogen) and in Table 1.7-2 as percent saturation of oxygen and nitrogen. Figures 1.7-1 through 1.7-6 show the percent saturation of oxygen and nitrogen for each station for each month of sampling. Figures 1.7-1 through 1.7-6 illustrate the percent saturation {
,
values of oxygen and nitrogen for Lake Keowee at a control station (501) and seven stations which are influenced to varying degrees by e ONS operations (502, ONS intake,0NS discharge, 508, 503, 504. and 505) . l The figures shew the average, minimum and maximum percent saturation values recorded for each station. Generally the highest average saturation values were recorded for the ONS discharge and Station 508, immediately out from the discharge structure. The following is a summary of the sampling station , , minimum and maximum values for the six sampling periods (station , + values were decermined by averaging the four sampling depths): 1.7-2 ONS 12/76 l
- ,
% Nitrogen Saturation Date Minimum Maximum 1/7/76 88.2% - Station 504 105.9% - Station 508 2/20/76 96.7% - Station 503 105.6% - Station 508 3/4/76 89.3% - Station 505 104.8% - Station 508 4/1/76 94.4% - Station 501 102.9% - Station 508 11/11/76 95.5% - Station 502 110.2% - Station 505-12/16/76 91.3% - Station 502 103.5% - ONS Discharge
% 0xygen Saturation Date Minimum Maximum
~
1/7/76 82.8% - ONS Intake 99.3% - Station 508 2/20/76 87.7% - ONS Intake 98.9% - Station 505 3/4/76 79.4% - ONS Intake 100.5% - Station 501 4/1/76 76.8% - ONS Intake 96.6% - Station 505 , 11/11/76 81.2% - Station 503 94.5% - Station 505 12/16/76 84.9% - Station 501 97.7% - ONS Discharge The average nitrogen values were generally highest at Station 508 and the discharge, however, the highest average value was recorded for Station 505 in November (110.2%). Supersaturation of nitrogen was recorded for all sampling stations at individual depths for at least one of the six sampling periods. Supersaturation of oxygen was less evident. Average oxygen saturation values show that Station 501, the control station, exhibited supersaturation of oxygen in March (100.5%). IV.
SUMMARY
AND CONCLUSIONS Nitrogen supersaturation as reported in previous Semi-Annual Reports was again evident in,the ONS discharge. Supersaturation of dissolved gases can be attributed to the increase in temperature (at) and pressure as the water passes through the Condenser Cooling Water system during ONS operations. Nitrogen supersaturation due to the operation of ONS is primarily limited to the discharge area and with similar conditions occurring in the control area the impact on the fishery resource of Lake Keowee is insignificant for this reporting period. LITERATURE CITED Duke Power Company. 1973a. Appenaix B to Facility Operating License Nos. DPR-38, DPR-47, and DPR-55, Technical Specifications for the Oconee Nuclear Station Units 1, 2, and 3, Duke Power Company. U. S. Atomic Energy Commission, Docket Nos. 50-269, 50-270, and 50-287 (revised August 19, 1974, NRC), Washington, D. C. Duke Power Company. 1973b. Oconee Nuclear Station. Semi-Annual Report, Period Ending June 30, 1973. __
.
1974. Oconee Nuclear Station. Semi-Annual Report, Period Ending June 30, 1974. 1.7-3 ONS 12/76
~ . - . - - .~ - - - _ - _ . .- . . _ -.-
i Page I of 2 TABLE 1.7-1 DISSCLVED CAS CONCENU ATION VALtIES FOR LAKA KE0 WEE OCONEE NUCLEAR STATION 1976 SAMPLING STATIONS 503 SC4 535 Intake Discharge 503 501 502 al/l Temp al/l al/l Temp ml/l al/l Tcmp al/l al/l Temp al/l ul/l Date Depth Temp ml/l al/l Tenp nl/l nl/l Tcmp ml/l ml/l Temp ml/l 0 ( C) 0 N ( C) 0 N ( C) N ( C) 0 N ( C) 0 N ( C) 0 2 N 2 ( C) 0 2 N 2 2 2 2 2 2 (m) ( C) O 2 2 2 2 2 13.85 15.5 6.56 12.53 16.2' 6.14 11.10 15.4 6.80 12.21 U.3 10.6 7.31 13.99 12.3 6.99 13.21 11.7 5.90 12.2) 19.1 6.20 13.25 16.8 7.11 16.1 6.18 11.29 15.4 6.94 12.44 01/07 13.24 18.7 6.12 12.14 17.0 6.19 12.83 15.0 6.76 12.51 10.4 6 65 13.09 12.1 7 . 0 ". 11.14 11.6 6.12 16.2 6.78 11.77 15.5 6.73 12.54 1.5 14.5 6.33 12.27 10.8 6.73 13.13 12.4 6.81 12.90 11.6 6.11 13.15 17.5 5.71 11.91 16.7 6.95 13.65 6.07 10.97 15.2 6.59 11.86 3.0 13.2 6.47 13.23 16.1 6.66 13.51 12.1 7.05 13.30 11.6 7.10 15.17 17.9 6. 16 12.77 15.4 6.88 13.48 6.1 10.7 13.97 13.0 6.98 11.59 13.9 7.12 14.07 14.7 7.00 13.16 14.15 13.7 7.10 11.70 10.6 6.81 11.81 15.4 6.70 11.52 14.5 7.05 6.88 ;11.10 02/20 0.3 12.5 7.43 14.44 12.7 6.91 13.48 13.5 7.05 13.89 13.9 1.5 11.9 7.41 14.04 12.9 7.02 IJ.64 10.1 7.04 I4.58 14.4 7.54 14.98 13.9 7.21 13.5 6.80 13.48 13.6 7.25 '11.54 7 14.42 L3.6 6.87 13.97 13.5 7.08 14.15 12.5 6.21 12.61 11.5 7.56 84.25 12.7 1.20 13.65 9.5 7.04 !).3 6.91 13.77 13.5 7.43 13.88
- i' 3.0 13.81 13.4 6.74 13.56 13.1 6.98 14.09 12.3 6.85 13.39 6.4 11.2 7.50 14.23 12.5 1.17 ll.82 9.4 6.74
- (
. .
.
11.58 17.5 6.25 13.10 15.7 6.29 11.26 14.7 6.56 12.63 14.4 5.72 11.73 14.6f>.04g2.07 16.6 6.69 12.51 11.1 6 . 19 03/04 0.3 16.5 6.81 12.61 5.59 12.42 17.4 6.30 13.38 15.4 7.77 14.87 14.6 6.73 13.06 14.3 6.26 12.62 14.5 6.05 a l.86 10.8 1.5 16.) 6.98 12.84 16.7 h.86 12.95 6.40 !).25 16.7 6.26 13.30 14.6 6.41 13.45 14.4 6.63 12.81 14.1 6.74 13.32 14.5 5.94fil.60 3.0 16.0 7.01 12.68 15.5 6.71 12.78 10.6 6,80 13.28 14.0 7.44 14.21 13.7 b.08 11.82 10.3 6.27 11.19 13.5 6.44 13.44 13.8 6.45 13.36 13.9
'6.1 14.6 6.99 12.67 14.1 n.88 12.89 12.86 14.5 6.44 11.9) L5.1 5.87 12.45 14.5 6.68 13.51 15.3 6.58 12.56 14.7 6.38 L1.91 15.2 b.15 12.55 l2.2 5.51 13.26 14.5 5.58 12.97 15.3 b.Sl 13.00 04/01 0.3 11.12 14.6 6.26 13.83 15.3 5.92 12.91 14.7 6.34 1.5 14.8 6.61 12.54 15.2 b.74 13.21 12.0 5.68 13.40 14.5 5.62 14.56 14.6 6.51 13.60 15.3 h.72' l.19 6.06 13.98 14.5 6.06 11.64 14.4 6.08 13.13 15.3 6.36 14.7 6.71 L2.64 15.1 6 . 10 12.85 II.9 13.11 14.5 6.62 13.71 1.48 3.0 4.46 L1.25 11.9 5.88 11.80 L4.6 5.61 12.74 14.2 6.30 13.57 15.1 6.15 15.2{>.95 6.1 14.5 6.65 12.61 15.1 n
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-
.
Page 2 of 2 TABLE 1.7-1 (Cont'd) DISSCLVED Ct.S CONCENTRATION VALUES FOR LAKE KECWEE OCONr.E NUCLEAR STATION 1976 SAMPLING STATIONS 501 502 Intake Discharge 503 503 504 505 Date Ocpth Temp ml/l nl/l Temp cl/l al/l Temp ml/l al/l Temp ml/l al/l Temp ml/l al/l Temp ml/l ml/l Temp nl/l al/l Tcap ml/l nl/l (m) { C) 0 N ( C) 0 # ( C) 0 .N2 ( C) 0 Ny 2 2 2 2 2 2 ( C) Oy Ng ( C) 0 2 N ( C) Oy N ( C) 0 N 2 2 7 11/11 0.' 16.5 5.89 12.23 17.3 5.57 11.36 16.1 6.08 12.64 19.9 6.14 12.27 20.0 t 47 12.62 18.3 5.13 12.33 18.8 6.02 12.16 17.9 6.31 14.38 1 16.2 5.70 11.83 17.0 5.99 12.48 16. fi 6.14 12.70 20.1 6.01 11.88 19.8 5.58 11.99 17.7 5.30 12.17 18.8 5.90 12.17 17.8 6.37 14.50
, 16.2 6.03 12.46 16.9 6.73 13.16 16. ti 6.01 12.51 20.0 5.83 !!.80 19.2 5.79 12.49 17.6 5.46 12.74 18.8 5.54 12.!! 17.9 6.07 11.39
.1 16.2 5.71 12.84 16.8 5.36 11.07 16. fi 4.99 11.53 19.8 5.84 11.55 18.1 5.81 12.11 17.3 5.71 12.87 18.5 5.21 11.59 17.8 6.32 14.31 1: ~ 0.3 11.4 7.02 13.46 12.8 6.26 12.24 12.1 6.58 13.06 19.1 6.92 13.34 17.0 6.60 13.13 13.7 6.88 12.85 15.5 6.94 13.36 13.6 6.50 12.51 7" 1.5 !!.4 6.48 13.46 12.7 6.54 12.52 11.8 7.01 13.84 18.5 6.64 13.07 15.8 6.53 12.95 13.6 6.51 12.29 15.5 6.53 12.71 13.5 6.62 12.65 Y 1.0 11.4 6.93 13.98 12.6 6.29 i2.38 !!.8 6.96 13.84 18.2 6.73 13.18 14.4 6.64 12.92 13.4 6.30 12.12 15.5 6.20 12.14 13.5 6.84 13.35
- 6.1 11.3 5.52 10.65 12.5I6.74 12.98 11.8 7.00 13.77 16.1 5.54 11.46 13.9 6.59 13.02 13.0 6.68 12.77 14.0 6.09 12.33 13.2 6.44 12.38
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.
;
O. a . 4
- _ - - - - - - - - ._ - __ - _ __ __________ _ __
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1*.s ge L of 2 TABLE 1.7.2 DIS 30LVED CAS SATURATION VALUES FOR LAKF. KE0 WEE i OCONEE KJCLEAR STATION 1976 SAMPLUlG STATIONS 503 534 505 Intake Discharge 503 I
'
501 502 Temp % Sat. 1 Sn. Temp t %t . Temp % Sat. Temp % Sat. Temp % Sat. Date Depth Temp % Sat. Tcmp % Sat. 0 N 0 N ( C) 0 N ( C) 0 N ( C) 2 0 N ( C) 0 N ( C) 0 N ( C) 2 2 2 2 2 2 (m) ( C) Oy N 2 ( C) 2 2 2 2 2 2 2 15.5 94.2 76.8 16.2 89.4 86.7 15.4 97.3 94.1 97.7 12. l 93.4 95.6 11.7 77.7 87.4 19.1 95.9 109.5 16.8 104.E 109.7 15.4 99.3 95.8 01/07 10.6 )),1 15.0 95.9 35.6 16.1 89.N 88.2 0.3 91.7 97.6 11.6 80.6 94.,4 18.7 91.9 99.7 17.0 91.0 102.0 1.5 10.4 :s 94.0 12.1 14.5 88.9 32.6 to.2 98.7 92.1 15.'i 96.6 96.9 92.1 12.4 91.3 91.6 11.6 80.3 93.8 17.5 85.4 95.6 16.7 102.1 107.9 85.7 15.2 93.9 91.1 1.0 10.8 ;6 17.9 95.9 103.3 15.4 98.0 103.8 13.2 88.2 )7.6 16.1 88.' , 10.7 15,4 94.5 12.3 94.1 96.3 11.6 92.7 108.2 h.I 19.8 13.9 14.7 98.7 100.0 15.4 96.0 104.2 14.5 100.(I 105.8 13.0 94.8 98.7tos.3 12.5 99.h102.8 13.7 97.9 l01.3 10.6 87.5 96.4 98.4 13.5 96.8l03.0 13.9 95.4 98.0 b!/20 0.3 12.9 95.l l00.0 10.5 90.3 101.6 14.4 105.6 113.2 13.9 100.0 108.0 12.7 93.1 13.6 99.7 100.6 1.5 11.9 - .100. 7 91.7 13.5 93.4 l00.0 13.6 94.6 103.9 13.5 97.1 105.0 12.5 83.4
'.,8. .-
99.2101.4 12.7 97.1 99.6 9.5 88.1 98.3 96.9 13.3 94.8l01.7 13.5l02.0 103.0 U 1.0 11.5 9.4 84.3 94.1 13.4 92.4 100.4 13.1 95.1 103.7 12.3 91.6
/> 6.1 11.2 97.7 l00.7 12.5 96.3 l00.5 14.4 80.1 88.6 14.6 85.0 98.C 98.8 11.1 83.1 95.'8 17.5 93.5 106.7 15.7 90.7 102.8 14.7 92.4 36.0 14.3 87.5 95.2 14.5 84,9 89.8
'03/04 0.3 16.5 99.' 99.1 in.6 98.2
,10.8 72 4 87.1 17.4 94.1 107.2 15.4 111.2 114.5 14.6 94.7 39.0 14.5 83.4 87.8 16.7 100.9l02.3 14.1 93.h100.0 1.5 16.3 ;01.F 100.7 av.6 82.3 92.5 16.7 92.2 105.1 14.6 90.2 102.0 14.4 92.9 96.9 13.7 83.H 88.0 3.0 16.0 102.1 98.8 I5.5 96.6 98.7 88.5 99.7 13.8 89.2 99.8 13.9 94.2 601.4 14.0 101.4 106.6 L4.1 96.1 96.8 10.3 80.1 92.9 13.5 6.1 14.6 98.' 96.1 1 93.9 96.h I
12.2 73.5 95.7 14.5 78.4 97.3 14.5 90.4 105.5 15.3 83.8 95.7 14.5 93.7102.2 15. 15.1 97.2 100.0 0.3 14.7 90.0 90.5 15.2 90.4 96.3 88.1 104.9 15.3 84.6 99.3 14.7 89.3 96.6 04/01 96.0101.6 12.0 75.4 96.4 14.5 78.9 99.3 14.6 15.3 96.0 101.4 1.5 14.8 93.1 95.5 15.2 89.6 98.4 11.9 80.2 100.4 14.5 85.1 103.2 14.4 85.1 99.2 15.3 90.9 111.9 14.6 91.5l03.2 15.7 99.1 103.5 3.0 14.7 94.5 96.1 15.1 11.9 77.9 99.1 14.6 78.7 96.7 14.2 87.8 102.1 15.3 87.9 100.8 14.5 92.9103.8 6,1 14.5 93.1 95.5 15.1 91.9 l01.5 8 m b Oe &
.
- . .
P. age 2,uf 2 TABLE 1.7.2 (cont'd) DISSCLVED CAS SATURATION VALUES FOR LAKE KE0tJEE OCONEE NUCLEAR STATION 1976 SAMPLING STATIONS 501 502 Intake Discharge 503 503 504 505 Date Depth Temp % Sat. Temp % Sat. Temp 2 Sat. Temp % Sat. Temp 2 Sat. Temp t Sat. 2 S:t. Temp 7 Ur-(m) ( C) 0 2 N 2 ( C) 0 2 N 2 ( C) Oy N ( C) 0 Ny ( C) 0 N ( C) 0 Ny ( C) 0 N ( C) 0 N 2 2 2 2 2 2 2 2 2 11/11 0.3 16.5 86.3 96.3 17.3 8 3. t' 90.8 16.1 88.3 98.8 19. 'l 96. '. 102 . *, 20.0 95.5 106.0 18.J 78.0 100.5 18.8 92.6 100.0 17.9 1.5 95.1 116.2 16.2 83.0 92.6 17.0 88.0 99.2 16.6 90.1 100,2 20.1 94.8 100.0 19.8 87.4 100.4 17.7 79.6 98.0 18.8 90.7 100.0 17.8 3.0 87.8 95.4 117.0 16.2 97.5 16.9 99.4 104.4 16.6 88.2 98.7 20.0 91.8 99.2 19.2 89.7 103.5 17.0 81.9 102.5 18.8 85.1 99.6 b?.9 6.1 16.2 83.2 100.5 16.8
- 91. t, 92.1 79.1 87.7 16.6 73.3 91.0 19.e 91. f. 96.7 18.1 88.1 98.3 17.1 85.1 102.9 18.5 79.6 94.7 :7.8 95.1 115.5 12/16 0.3 11.4 92.0 95.6 12.8 79.' 89.5 12.1 87.6 94.1 19.1 106.9 110.3 17.0 97.7 104.4 13.7 94.9 95.7 15.5 99.6 103 2 13.6 1.5 89.4 93.0 7 11.4 84.8 95.6 12.7 88.2 91.3 !!.8 92.9 99.1 18. 'l 101.4 106.9 15.8 94.3 100.6 13.0 89.6 91.3 15.5 93.7 98.1 13.5 90.9 y 3.0 11.4 99.3 12.6 93.9 90.8 8 4. ti 90.2 11.8 92.0 99.1 18.2 102.1 107.1 14.4 92.9 '97.6 13.4 86.3 89.7 15.5 88.9 93.7 13.5 94.0
"
6.1 11.3 72.1 75.5 12.5 90.4 94.3 11.8 92.6 99.0 98.6 16.1 80.5 89.5 13.9 91.2 97.4 13.0 90.7 93.7 14.0 84.6 92.4 13.2 87.9 91.3 l R v. >J O e a
- _ _ _ _ _ _ _ _ . _ - _ - . _ _ _ . _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ - - _ - _ - -_ __ _
e
.
Figure 1.7-1 Dissolved Gas Saturation Values for Lake Keowee* Oconee Nuclear Station January 1, 1976 115
.
.
112 109
,s 106 l s' \
103 o
,' N s
,
' ---
'
100 ------------- -,- ---- -- x----- l / \
/ s +
i c i
, , , , _ _/
i 3 l o 97 - N u \ # l l 2 94 g
/ N
\ /
/
u N i e' r2 91
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v' 88 -
- 85 82 79 76 '
i 1 i i i i i I 73 is i i # a Intake Discharge 508 503 504 505 501 502 ( Sampling Stations Oxygen saturation (average of four sampling depths)
--- Nitrogen saturation (average of four sampling depths)
- Vertical bars depict range of saturation values per sampling station
.
1.7-8 ONS 12/76
, I Figure 1.7-2 Dissolved Gas Saturation Values for Lake Keowee* Oconee Nuclear Station February'20, 1976 l 115 112 . 109 106 g_____
< \
103 / \
~~, / \ - m~~ '
/ \ / -
, ,
100 -- -----%---- s /- - ---- ---A-- 7'----- -
'
c 97 j
..
, u l 2 a 94 I h 91 / N 88 85 82 79 76 73 , , , , , , , , , , , , , , , , 501 502 Intake Discharge 508 503 504 505 Sampling Stations Oxygen saturation (average of four sampling depths)
- Nitrogen saturation ,(average of four sampling depths)
- Vertical bars depict range of saturation values per sampling station.
1.7-9 ONS 12/76
-
Figure 1,7-3 Dissolved Gas Saturation Values for Lake Keovee*
,
Oconee Nuclear Station March 4, 1976 115 112 . 109 106 ,_ -s %
- e i \
103 / 1
%
'
- - - '- - -
t-
---
100 -- -, g - - - - - - r- - - - - s
-
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s .
=
o
,, A / t ,
s
;
/ .
N u s !
<
s e 94
- l. \ 's' 5 91 N 88
{ 85 82
,
79 76
, , , , ,, ,;
73 , , , , , ,
, ,
508 503 504 505 501 502 Intake Discharge Sampling Stations ! 0xygen saturation (average of four sampling depths)
--- Nitrogen saturation (average of four sampling depths)
*- Vertical bars depict range of saturation values per samplin<, station ,
[ !- 'ONS 12/76 1.7-10
.
- t
. _ -__ _ __ - __ __ _-
1 Figure 1.7-4 Dissolved Gas Saturation Values for Lake Keowee* Oconee Nuclear Station April 1, 1976 115 112 - 109 106 103 ,___
,s ~ ~ - - - _ _
100 -------- ----------
-
- ---- -----
_~~~.
----
,
,
'~ ~~_____ - !
c 97 ,'
'
. ,
"'
% 94
"
5 % S 91 ; u 88 -
~
85 82 79 76 73 i e i i i e i i e i i i i e i a 501 502 Intake Discharge 508 503 504 505 Sampling Stations Oxygen saturation (average of four sampling depths)
- Nitrogen saturation (average of four sampling depths)
- Vertical bars depict range of saturation values per sampling station i
I i i i ! 1.7-11 ONS 12/76 !
._ _ - __
. . . - ,
Figure 1. 7 -5 Dissolved Gas Saturation Values for Lake Keowee* Oconee Nuclear Station November 11, 1976
.
I 115 l
, ,
112 /'
/
109 /
/
'/
106 /
/
/
103 ,/~~~~ __ i
-- .- ---- - ,-
'
'
-- ---- ',#--,
-
/
100 --
- ,
/
'
-
-
g 97 - ~ _ _I, l 0e 94 i i 64 0 l e 91 i
'
I l '
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- 88 i !
85 , I l'
'
82 i j I 79 76
, i i i ii i i 73 ,, , , ,, .. i 508 1503 504 505 501 502' Intake Discharge Sampling Stations
.
I Oxygen saturation (average of four sampling depths)
--- Nitrogen saturation (average of four 'aampling depths) .
- Vertical bars depict' range of saturation values per sampling station
! ! 1.7-12' 'ONS 12/76 l
. . - , ,, . - - . - . . . . - - ,
I
-
Figure 1.7-6 Dissolved Gas Saturation Values for Lake Keowee* Oconee Nuclear Station December, 1976 l-115 112 - 109 106 103 , e's s
/ %
100 --------------/-/ -
---'% ---------
\
----
c ' N o 97 ~
/ N N 's s ,' N ,'
'
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w 94 s f s ,' 3 s v S 91 s
e - #
n
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88 85 82 79 76 73 a i i i i a i i i e i i i i e i 501 502 Intake Discharge 508 503 504 505 Sampling Stations Oxygen saturation (average of four sampling depths)
- Nitrogen saturation (average of four sampling depths)
- Vertical bars depict range of saturation values per sampling station l
l
,
1.7-13 , ONS 12/76 1 1
,
.
.
SECTIONII NUUALOPERATItraREPORT
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_ . _ _ _ . . . . .. . . . . _ _ l-
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f I I 2. INTRODUCTION This section of the Annual Operating Report is submitted pursuant to Section J 6.6.1.2 of the Oconee Nuclear Station Technical Specifications. This section
- summarizes operation of Oconee Nuclear Station Units 1, 2, and 3 from January
- 1, 1976 through December 31, 1976.
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2.1 REPORT FOR JANUARY,1976
.
2.1-1
I 2.1.1. OPETaTIONS
SUMMARY
2.1.1.1 Unit 1 2.1.1.1.1 Operating Experience Oconee Unit 1 operated at 100 percent full power until January 10,1976 when power was reduced to 65 percent full power to repair a weld leak between "A" feedwater pump turbine and feedwater valve FDW 281. Full power operation was resumed on January 11, 1976, despite some difficulty with high negative im-balance during the power increase. On Janury 16, 1976, power was reduced to 93 percent full power to repair a leaking expansion joint on the D1 heater. Power was reduced to 90 percent full power on January 18, 1976 to perform a -
" Reactivity Coefficients at Power" test. The unit was returned to 100 percent full power the same day.
Unit 1 tripped on January 22, 1976 due to protective relaying on the generator. The alterex bus bars affected were repaired and unit resumed 100 percent full power operation on January 27, 1976. Power was reduced the same day to 94 percent full power in order to reduce the temperature rise across the "C" heaters. While returning to 100 percent full power the limiting control rod position was reached requiring deboration of the system. On January 28, 1976 the unit was returned to 100 percent full power and continued full power operation the duration of the month. 2.1.1.1.2 Changes, Tests and Experiments not requiring prior NRC approval. The following changes, tests and experiments were carried out without prior NRC approval pursuant to the provisions of 10CFR50.59 during January,1976,
- 1. Station modification ON-171 was completed. The modification involved the installation of a quick disconnect, flexible hose, sightglass and stain-less steel pipe to the control rod drive filters. This will prevent contaminated water spills in the auxiliary building.
- 2. Station modification SPR-267 was ccmpleted. This modification involved the installation of additional lighting in the steam generator cavities.
The modification provided a safe level of lighting for work in the cavities.
- 3. Revisions 0 and 1 of station modification ON-432 were completed. This modification involved installation of additional fire detection equipment to the main turbine oil lif t pumps. This will provide more reliable and ;
increased fire protection. t
- 4. Revisions 0 and 1 of station modification ON-492 were completed. The modification involved removing the pipe connecting the component drain I pump discharge header to the condensate storage tank inlet header and cap-welding the pipe'end. This modificatioa will aid in preventing unplanned radioactive liquid releases.
.
- 5. Station modification ON-519 was completed. This modification provided l borated water storage tank level transmitters with independent heat l tracing circuits for Dekoron tubing on instrument impulse line. The independent circuits will prevent total transmitter failure on the loss l l of one power supply. I j 2.1-2
- 6. Station modification ON-542 was completed. The modification involved the replacement of Velan valve, LWD-334, with more reliable Kerotest valves.
2.1.1.1.3 Maintenance The following safety related maintenance was' performed during January, 1976. This section excludes major safety related corrective maintenance reported in 2.1.1.1.4. The mechanical seal in "1C" low pressure injection pump was replaced.
.
E 2.1-3 d;;
;
'
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_ _ DOCKET NO. 50 - 269 2.1.1.1.4 OUTAGES OR FORCED REDUCTIONS IN POWER UNIT NAME oconee Unit I (Over 20 Percent of Design Power Level and Longer Than Four Hours) REPORT MONTH January, 1976 SYSTEM CAUSE OR CORRECTIVE SAFETY-RELATED COMPONENT DURATION REPORTABLE ?CTIONS MAINTENANCE DATE . AFFECTED (HOURS) REASON OCCURRENCE [ NUMBER 1/10/76 Power was reduced from 100 percent to 4.54 A The "A" feedwater pump turbine was 65 percent full power due to a weld leak between "A" feedwater pump isolated and the weld was repaired. turbine and valve FDW - 281 1/22/76 The. unit tripped from 100 percent full 82.23 A power when the generator exciter The generator exciter was cleaned and repaired. (Alterex) bus har vibrated loose , resulting in a phase to phase short. Sumenry: There was no single release of radioactivity or unusual radiation exposure specifically associated with any outage which accounted for more than 10 percent of the allowable annual
- values.
D'
'T .
>
A-EQUIPMENT FAILURE (EXPLAIN) E-0PERATOR TRAINING AND LICENSE EXAMINATION
- B-MAINTENANCE OR TESTING F-ADMINISTRATIVE C-REFUELING G-0PERATIONAL ERROR (EXPLAIN)
., .u . ... , . ni v i . a .. i r i n . n nnine o vPi ano
2.1.1.2 Unit 2 2.1.1.2.1 Operating Experience The unit operated at 100 percent full power until January 10, 1976 when the reactor was brought to hot standby due to unidentified reactor coolant leakage. The leak was identified as a packing leak on an upper instrument root valve to pressurizer level transmitter LT-1 and was repaired. Unit startup was commenced but on January 11, 1976, power was held at 60 percent full power to repair a faulty suction relief valve on "A" feedwater pump. A steam leak on a high pressure stop valve drain was also repaired and, on January 14, 1976, the reactor was returned to 100 percent full power. The unit power was reduced to 19 percent full power to irspect the generator exciter on January 23, 1976, ~ and on January 26, 1976 power was returned to 100 percent full power. The unit continued power operation the duration of the month. 2.1.1.2.2 Changes, Tests and Experiments not requiring prior NRC approval. The following changes, tests and experiments were carried out without prior NRC approval pursuant to 10CFR50.59 during January,1976.
- 1. Revisions O end 1 of station modification ON-432 were completed. This modification involved the installation of additional fire detection equipment to the main turbine oil lift pumps. This modification will provide more reliable and increased fire protection.
- 2. Revisions 0,1 and 2 of station modification ON-492 were completed. The modification involved removing the pipe connecting the component drain pump discharge header to the condensate storage tank inlet header and cap-welding the pipe end. This modification will aid in preventing unplanned radioactive liquid releases.
2.1.1.2.3 Maintenance The following safety related maintenance was performed during January, 1976. This section excludes major safety related corrective maintenance reported in 2.1.1.2.4. One coolant storage system valve was repaired by replacing the valve diaphragm. 2.1-5 . _ _
i
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_ _ . . _ . . DOCKET NO. 50 - 270 2.1.1. 2 . 4 OUTAGES OR FORCED REDUCTIONS IN POWER UNIT NAME oconen unit ? (Over 20 Percent of Design Power Level and Longer Than Four Hours) REPORT MONTH _ r, n iin ,v ion SYSTEM CAUSE OR CORRECTIVE SAFETY-RELATED COMPONENT DURATION REPORTABLE ACTIONS MAINTENANCE DATE AFFECTED (HOURS) REASON OCCURRENCE NUMBER 1/10/76 The reactor was shutdown from 100 18.72 A RO 270/76-1 The pressurizer level transmitter LT-1 was percent full power to identify isolated and the valve packing repaired. reactor coolant system leakage. A packing leak on an upper instrument root valve to pressurizer level trans-mitter **LT-lwas found. 1/11/76 Power was held at 60 percent full 13.16 A The relief valve and a steam Icak on a high power during power escalation due pressure stop valve drain were repaired, to a faulty suction relief valve on "A" feedwater pump. 1/23/76 The unit was placed in hot standby 7.82 B Generator exciter inspected. from 99 percent full power to inspect the generator exciter.
,
Summary: There was no single release of radioactivity or unusual radiation exposure specifically associated with any outage which accounted for more than 10 percent of the allowable annual values.
."
7
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A-EQUIPMENT FAILURE (EXPLAIN) '-OPERATOR TRAINING AND LICENSE EXAMINATION i
- B-MAINTENANCE OR TESTING F-ADMINISTRATIVE C-REFUELING G-0PERATIONAL ERROR (EXPLAIN)
............,..c...... u nuie. ,frvueasui
_ _ _ _ . - _ _ _ _ - - _ _ - - - _ _ _
__- __________ _ _ _ _ _ _ 2.1.1.3 Unit 3 2.1.1.3.1 Operating Experience The unit began January,1976 operating at 75 percent full power with one re-actor coolant pump inoperable due to a low oil level alarm received on
~
December 31, 1975. The unit was shutdown on January 2,1976 to correct the problem. Full power operation was resumed on January 6,1976 and continued until January 30, 1976 when the unit tripped due to temporary loss of DC power to the turbine Electro-Hydraulic controls. After investigation of the incident, power was escalated and the unit finished the month at 80 percent full power awaiting xenon equilibrium before increasing to 100 percent full , power. 2.1.1.3.2 Changes, Tests and Experiments not requiring prior NRC approval. The following changes, tests and experiments were carried out without prior NRC approval pursuant to the provisions of 10CFR50.59 during January,1976.
- 1. Revisions 0 and 1 of station modification ON-492 were completed. The modification involved removing the pipe connecting the componenu drain pump discharge header to the condensate storage tank inlet header and cap welding the pipe end. This modification will prevent unplanned radioactive liquid releases.
2.1.1.3.3 Maintenance The following safety related maintenance was performed during January,1976. This section excludes major safety related corrective maintenance reported in 2.1.1.3.4. No safety related maintenance was performed. 1 , l 2.1-7 ,
_
. . _ .
DOCKET NO. 50 - 269 OUTAGES OR FORCED REDUCTIONS IN POWER UNIT NAME n . . , ,, i,,,, , 2.1.1.3.4 (Over 20 Percent of Design Power Level and Longer Than Four Hours) REPORT MONTH January. 1976 SYSTEM CAUSE OR CORRECTIVE SAFETY-RELATED COMPONENT DURATION REPORTABLE ACTIONS MAINTENANCE DATE AFFECTED (HOURS) REASON OCCURRENCE NUMBER 1/1/76 Continuation of previous power 45.18 A corrective action taken during January reduction (75 percent full power) due 2, 1976 outage. to low oil level on "3A l" reactor coola nt pump 1/2/76 Reactor uns shutdown from 75 percent 20.90 B 011 was added to the reactor coolant pump. full power to ir.vestigate a low oil Investigation of possible long term level alarm received on December 31, solution undertaken. 1975 on the "3Al" reactor coolant pump. 1/30/76 A temporary loss of 24VDC power to the 5.63 A Two lug bolts on the DC power supply turbine Electro-ilydraulic Control cables to the EllC system circuit board System (EllC) resulted in a unit trip. were tightened. The cause was undetermined. . Summary: There was no single release of radioactivity or unusual radiation exposure specifically y associated with any outage which accounted for
- more than 10 percent of the allowable annual
.& values.
I A-EQulPMENT FAILURE (EXPLAIN) E-0PERATOR TRAINING AND LICENSE EXAMINATION B-MAINTENANCE OR TESTING F-ADMINISTRATIVE C-REFUELING G-OPERATIONAL ERROR (EXPLAIN)
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i 2.2 REPORT FOR FEBRUARY, 1976
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h l l l 2.2-1
! 2.2.1 OPERATIONS
SUMMARY
2.2.1.1 Unit 1 2.2.1.1.1 Operating Experience Oconee Unit 1 operated at approximately 100 percent full power until February 7, 1976 when the unit was shutdown at the end of Cycle 2 for the refueling
- outage.
2.2.1.1.2 Changes, Tests and Experiments not requiring prior NRC approval. The following changes, tests and experiments were carried out without prior NRC approval pursuant to 10CFR50.59 during February, 1976. ,
- 1. Revision 1 of station modification ON-13 was completed. This modification replaced the Electro Hydraulic Control first stage pressure transmitters with more reliable Rosemount transmitters.
- 2. Revisions 0 and 1 of station modification ON-47 were completed. The modification involved the installation of a drain valve connection between the turbine oil valve T0-ll and the tank on the bottom of the drain line.
The modification will facilitate the sampling and draining of water from the tank.
- 3. Parts one throug'h four of station modification ON-ll8 were completed. The modification involved various changes to the 230 KV switchyard including increasing the threshold voltage of breaker failure relays, separating various cables from the five transformer lockout relay circuits, changing the coils on interposing relays and installing overcurrent monitor relays.
4 Revisions 2 through 13, and 15 and 16 of station modification ON-203 were completed. The modification included various revisions to the laundry and hot shower system, mainly involving rerouting of piping and addition and deletion of various valves. These changes were necessary to assure proper operation of the system.
- 5. Station modification ON-227 was completed. This modification involved the installation of a manual / auto station on the auxiliary shutdown panel to control pressurizer level control valve HP-120. The manual / auto station will allow pressurizer level control outside the control room.
- 6. Station modification ON-354 was completed. The modification revised the 7 KV switchgear sychronizing circuits to eliminate sychronizing check relay .
contact arcing. An arc suppressor was added and an auto / manual switch interlock was installed in order to lessen the duty cycle.
- 7. Station modification ON-362 was completed. The modification involved the installation of PA speakers in each steam generator cavity to insure adequate communications to all personnel. 1
- 8. Station modification ON-366 was completed. The modification altered !
Reactor Building cooling f an logic to assure that all fans operate at slow speed on the receipt of an engineered safeguard signal.
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l 2.2-2
- 9. Revision 1 of station modification ON-367 was completed. The modification involved changing the direction sensing and signal conditioning of the control rod drive direction f ault circuitry to prevent random trips of the control rod drive system.
- 10. Revision 1 of station modification ON-370 was completed. The modification deleted the auto-start creep function on the reactor coolant pumps oil lif t AC circuits and added a three minute time out on the DC lif t pumps.
This change will f acilitate the control and monitoring of the oil lif t pump operation.
- 11. Station modification ON-378 was completed. The modification involved the addition of isolation valves in the generator core monitor impulse lines at ,
a different location from the present isolation valves to improve access to these valves.
- 12. Station modification ON-379 was completed. The modification involved the addition of two retaining clips on each reactor coolant pump motor upper oil pot air seal. The modification will increase the integrity of the air seal.
- 13. Station modification ON-380 was completed. The modification raised the upper oil pot overflow drain opening on the reactor coolant pump motor to a point above the normal oil level. The change will help eliminate problems due to oil leaking from these pots.
- 14. Station modification ON-381 was completed. The modification involved the cutting of four holes in each upper oil pot baffle of the reactor ceolan:
pump motors to relieve air pressure.
- 15. Station modification ON-382 was completed. The modification involved the relocation of one reactor coolant pump upper oil pot vent and installed splash deflectors on both vents of each reactor coolant pump motor to pre-vent oil splashing.
- 16. Revision 1 of station modification ON-395 was completed. The modification involved the replacement of the original high pressure injection pump recirculation orifices with improved assemblies. This change will help alleviate erosion problems.
- 17. Revisions 0,1, 2 and 3 of station modification ON-402 was completed. The modification provided an outside hose header on the High Pressure Service Water System for conducting fire capacity tests.
- 18. Station modification ON-413 was completed. This change involved various electrical modifications to the "D" and "E" heater drain controls. This modification will allow better and smoother control of the heater drains system.
- 19. Station modification ON-422 was completed. To conform with standards for Class F insulation, this modification established the correct setpoints for temperature alarm on various motors.
2.2-3
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- 20. Revisions 0 and 1 of station modification ON-436 was completed. The modification involved the installation of various deadbands in the Integrated Control System to impreve control stability.
- 21. Station modification ON-452 was completed. The modification involved the installation of correctly sized thermal overloads in the motor control centers for all 208V and 600V engineered safeguard components.
- 22. Station modification ON-454 was completed. This modification involved the installation of isolation valves between the. upper and lower gauge glasses of the moisture separator and the moisture separator drain tank. The modification will facilitate maintenance on the gauge glasses.
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- 23. Station modification ON-456 was completed. The modification added a totalizing gas meter with isolation and bypass valves to the lines which supply hydrogen to the generator.
- 24. Station modification ON-466 was completed. The modification involved the installation of drain piping from the emergency feedwater pump turbine atmospheric discharge to the floor drain. This change will provide a method to drain any water accumulation in the discharge.
- 25. Station modification ON-475 was completed. The modification involved the str.engthening of the weld connection to all drain and performance con-nections on the main steam leads between the turbine control valves and the high pressure turbine.
- 26. Station modification CN-476 was completed. The modification revised drawings of electrical meters to agree with field conditions. The meter
' cables had been altered from design drawings to produce the right potential for obtaining the correct 4160 volt switchgear load to transducers.
- 27. Station modification ON-480 was completed. The modification involved the
replacement of Veland valves, GWD-58 and CWD-59, in the Gaseous Waste ! Disposal System, with more reliable Kerotest valves.
- 28. Revisions 0, 1, and 2 of station modification ON-496 were completed. This modification revised the unit motor operated disconnect auxiliary switches to prevent the trip of the unit main lockout relay.
- 29. Revisions 0, 2, 3, 4 and 5 of station modification ON-497 were completed.
The modification involved the replacement of various high pressure injection and liquid waste disposal valves with more reliable Kerotest-valves.
- 30. Station modification ON-498 was completed. The modification involved the installation of a new weldolet adjacent to the relief valve on the Electro Hydraulic-Control System (EHC) piping and moved the air bleed valve on the EHC piping to reduce the vibration of the air bleed valve.
- 31. Revisions 0 and -1 of station modification ON-500 were completed. The modification replaced the existing main fuel bridge control rod mast grapple with an improved model.
2.2-4
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- 32. Station modification ON-512 was completed. The modification involved the replacement of the existing reactor coolant pressure transmitters with more reliable Rosemount transmitters.
- 33. Station modification ON-522 was completed. This modification involved
, the removal of shield blocks from the stairway access to the Reactor Building basement. This change will allow easier access to the Reactor Building.,
- 34. Station modification ON-541 was completed. This modification involved the replacement of the Gerotor reactor coolant pump oil lift system pumps by Dynex pumps.
- 35. Station modification ON-544 was completed. This modification involved the .
installation of a spare source range detector in the spare detector well as an alternate to NI-2 in the Reactor Protection System.
- 36. Station modification ON-556 was completed. This change modified the suction pipe on the concentrate recirculation pump on radwaste evaporator 4
to allow addition of a compound gauge for measuring pressure.
- 37. Station modification ON-557 was completed. This modification added a re-lay in the control rod drive gate drive assembly power supplies. The relay will prevent the possible ratchet trip of control rod groups in the case where a single relay momentarily sticks.
]
- 38. Station modification ON-560 waa completed. The modification involved the addition of an isolation valve in the seal water supply line to the "lD2"
" heater drain pump. This isolation valve is independent of the other isolation valves on the seal supply line and allows isolation of one pump without affecting the other pump. .
- 2. 2.1.1. 3 Maintenance ,
The following safety related maintenance was performed during February,1976. This section excludes major safety related corrective maintenance reported in 2.2.1.1.4. Maintenance activities during the refueling outage included control rod drive uncoupling and coupling, reactor vessel head removal and replacement, and reactor vessel plenum removal and replacement. The seals in the reactor coolant pumps were inspected and replaced. Several safety related motors were inspected such as HPI pump motor, LP1 pump motor, and reactor building spray motor. Also, cpproximately eighty (80) valves were repaired by either repacking, replacing gaskets or diaphragms, or replacing the valves. All the repairs would be classified as minor repairs. Additional maintenance work done during the Unit i refueling outage is listed on the monthly data sheet for March.
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2.2-5 w-
_ DOCKET NO. 50 - 269 2.2.1.1.4 00TAGLS OR IiRCED REDUCTIONS IN POWER UNIT NAME o r , m ,,, irn i e i (Over 20 Ps:rcent ol' Des i si.. Power Level and Longer Than Four Hours) REPORT HONTH February, 1976 ___ SYSTEM CAUSE OR CORRECTIVE SAFETY-RELATED C OMPONElli DURATION REPORTABLE ACTIONS MAINTENANCE
'UATE AFFECIED (HOURS) REASON OCCURRENCE NUMBER 2/7/76 The unit was shutdown from 100 528.92 C percent full power for the annual refueling outage Summary: There was no single release of radioactivity
{e or unusual radiation exposure specifically associated with any outage which accounted for
"
more than 10 percent of the allowmale annual va lues. ~ A-EQVlFf)ENT FAILURE (EXPLAIN) E-OPERATOR TRAINING vhD LICENSE EXAMINAll0:4 D-MAIN 1ENANCE OR TESTil:G F-ADMINISTRATIVE C-REFUELING G-OPERATIONAu_ EHROR (EXPLAIN) D-REGULATORY RESTRICTION H-0TiiLR tr4g.LAlk)
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2.2.1.2 Un_it 2 2.2.1.2.1 Operating Experience The unit operated at 100 percent full power until February 13, 1976 when re-actor power was reduced to approximately 60 percent full power due to an inoperable control rod in group 8 resulting from a blown fuse, and a stator short. On February 14, 1976 the reactor was shutdown to repair the stator short on control rod 1 of group 8 and to replace the reactor coolant pump seals. The unit was returned to 99 percent full power on February 24, 1976, but power was reduced to 70 percent full power the same dav due to the loss of the "B" feedwater pump during a turbine trip test. The unit was returned to 100% full power on February 25, 1976. On February 26, 1976, rod 5 in group 2 dropped ~ during control rod movement periodic test due to a shorted stator resulting The in a power runback to 58 percent power and eventually a reactor shutdown. stator was replaced and on February 27, 1976, power escalation was commenced. The unit was awaiting xenon equilibrium at 80 percent full power as the month ended. 2.2.1.2.2 Changes, Tests and Experiments not requiring prior NRC approval. The following changes, tests and experiments were carried out without prior NRC approval pursuant to 10CFR50.59 during February,1976.
- 1. Station modification ON-131 was completed. The modification involved the shortening of a festoon system of cable drape on the refueling machine and pravided a sliding anchor system for attaching safety belts while work! he refueling canal.
- 2. Revisions 2 through 13, and 15 and 16 of ststion modification ON-203 were completed. The modification included various revisions to the laundry and hot shower system, mainly involving rerouting of piping and addition and deletion of various valves. These changes were necessary to assure proper operation of the system.
- 3. Station modification ON-211 was completed. This codification involved the replacement of the plastic insulation on the reactor coolant pump motor thermocouples with more durable rubber insulation.
- 4. Station modification ON-226 was completed. This modification involved the replacement of the relaye for the 600 ounce per hour high upper seal leak-age alarms on the reactor coolant pumps with higher sensitivity relays.
- 5. Station modification ON-422 was completed. To conform with standards for Class F insulation, this modification established the correct setpoints for temperature alarm on various motors.
Revisions 0 and 1 of station modification ON-436 were completed. The 6. modification involved the installation of various deadbands in the Integrated Control System to improve control stability.
- 7. Station modification ON-501 was completed. The modification involved the replacemeat of the existing 20 horsepower Auxiliary Building ventilation fan motors with 30 horsepower motors. This change will increase the performance of the ventilation system.
2.2-7
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- 8. Station modification ON-506 was completed. The modification involved changing the Electro-dydraulic Control - Integrated Control System contact from normally closed to normally open for the turbine control valve indication.
2.2.1.2.3 Maintenance The following safety related maintenance was performed during February, 1976. This section excludes major safety related corrective maintenance reported in 2.2.1.2.4. No safety related maintance was performed.
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_ DOCKET NO. 50 - 270 UNIT NAME Oconee Unit 2 2.2.1.2.4 OUTAGES OR FORCED REDUCTIONS IN POWER REPORT HONTH February. 1976 (over 20 Percent of Design Power Level and Longer Than Four Hours) 1 [SYST OR EM CORRECTIVE SAFETY-RELATED CAUSE ACTIONS MAINTENANCE DURATION REP 6RTABLE COMPONEtlT (HOURS) REASON OCCURRENCE D/. I t AFFECTED NUMBER 16.71 A Corrective action was taken during the 2/13/76 Power level was reduced to approxi- following outage. mately 60 percent full power due to a inoperable control rod (rod 1, group 8) resulting f rom a blown fuse and stator short. 201.0S B The stator was replaced. Also the "A2" and 2/14/76 The reactor was shutdown to repair a "B1" reactor coolant pump seals were replaced, stator short on control rod 1 of group 8. 7.11 A RO 270/76-3 Corrective action was taken during the 2/26/76 Power was reduced from 100 percent following outage. to 58 percent full power due to a dropped control rod (rod 5, group 2) resulting from a shorted stator.
- The stator was replaced. All stators Reactor was shutdown to repair a 40.12 B 2/27/76 of this type were scheduled to be stator short on control rod 5 of replaced during the Unit 2 refueling group 2 outage in April 1976.
Stannary: There was no single release of radioactivity or unusual radiation exposure specifically associated with any outage which accounted fo r more than 10 percent of the allowable annual y
- values, '
g l d2 A-EQulPMENT FAILURE (EXPLAIN) E-OPERATOR TRAINING SND LICEN5E EXAMINATION
- 3-MAINTENANCE OR TESTING F-ADMINISTRATlWE C-REFUELING G-OPERATIONAL ERROR (EXPLAIN)
D-RECULATORY RESTRICTION H-OlHER ,(EXPLAIN) < - - - - _ - - - __._ _
i 2.2.1.3 Unit 3 2.2.1.3.1 Operating Experience The unit began the month at the power level cutoff, awaiting xenon equilibrium before increasing to 100 percent full power. The unit reached 100 percent full power on February 2, 1976 and remained at that power level until February 8, 1976 when power was reduced below 75 percent full power due to a reactor coolant pump upper oil pot low level alarm. The reactor coolant pump was isolated and the unit ran at 73 percent to 74 percent full power until January 23, 1976 when the unit was shutdown for repair work on the reactor coolant pump seals. The unit remained shutdown throughout the remainder of the month.
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2.2.1.3.2 Changes, Tests and Experiments not requiring ?rior NRC approval. The following changes, tests and experiments were carried out without prior NRC approval pursuant to 10CFR50.59 during February,1976.
- 1. Revisions 2 through 13, and 15 and 16 of station modification ON-203 were completed. The modification included various revisions to the laundry and hot shower system, mainly involving rerouting of piping and addition and deletion of various valves. These changes were necessary to assure proper operation of the system.
- 2. Station modification ON-211 was completed. This modification involved the replacement of the plastic insulation on the reactor coolant pump motor thermacouples with more durable rubber insulation.
- 3. Station modification ON-422 was completed. To conform with standards for Class F insulation, this modification established the correct setpoints for temperature alarm on various motora.
- 4. Revisions 0 and 1 of station modification ON-436 was completed. The modification involved the installation of various deadbands in the Integrated Control System to improve control stability.
- 5. Revisio..s 0, 2 and 3 of station modification ON-496 were completed. This modification revised the unit motor operated disconnect auxiliary switches to prevent the trip of the unit main lockout relay.
2.2.1.3.3 Maintenance The following safety related maintenance was performed during February, 1976. This section excludes major safety related corrective maintenance reported in 2.2.1.3.4. No safety related maintenance was performed. 2.2-10
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DOCKET NO. 50 - 287 UNIT NAME oconee Unit 3 OUTAGES OR FORCED REDUCTIONS IN POWER 2.2.1.3.4 REPORT HDHTH February, 1976 (over 20 Percent of Design Power Level and Longer Than Four Hours)
-
$YSTEM CORRECTIVE SAFETY ~RElATED CAUSE OR ACTIONS MAINTENANCE DURATION REPORTABLE COMPONENT (HOURS) REASON OCCURRENCE Dr 8i AFFECTED
- .
NUMBER
..
Correct ive action was taken during the Power level was reduced to slightly 360.10 A 2/8/76 following outage. below 75 percent full power due to
- a reactor coolant pump upper oil pot low level alarm on reactor coolant pump "3Al" .
The reactor coolant pump seals were Reactor was shutdown from 75 percent 153.0 A 2/23/76 replaced and oil was added to the
.f ull power f or repair work on the reactor coolant pump upper oil pot.
reactor coolant pump seals. Summary: There was no single release of radioactivity or unusual radiation exposure specifically associated with any outage which accounced f cr more than 10 percent of the allowable annual n values.
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.L A-EQUIPMENT FAILURE (EXPLAIN)
E-CPERATOR TRAINING AND LICEN5E EXAMI N F-APMINISTRATIVE 0-MAINTENANCE OR TESTING G-OPERATIONAL ERROR (EXPLAIN) C-REFUELING H-0THER (L1 PLAIN) B-RECULATORY RESTRICTION ,
- _ _ - _ _ .
- 2. 3 REPORT FOR MARCH, 1976
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2.3.1 OPERATIONS
SUMMARY
2.3.1.1 Unit 1 2.3.1.1.1 Operating Experience Oconee Unit 1 remained shutdown for the refueling outage until March 31, 1976 when criticality was achieved through deboration to begin the Cycla 3 Zero Power Physics Test. . 2.3.1.1.2 Changes, Tests and Experiments not requiring prior NRC approval. The following changes, tests and experiments were carried out without prior NRC , approval pursuant to 10CFR50.59 during March, 1976.
- 1. Revisions 0,1 and 2 of station modification ON-68 were completed. The modification consisted of adding a two-ton jib crane in the Reactor Building. The crane will expedite maintenance activities.
- 2. Revision 4 of station modification ON-74 was completed. This modification involved the rewiring of a heat tracing circuit on the portable demineralizer system in order to obtain the proper wattage.
- 3. Revision 1 of sta' tion modification ON-ll7 was completed. The revision in-volved the addition of reactors to the generator differential relay circuits. This factory recommended change improved the reliability of the type sal relays.
- 4. Station modification ON-234 was completed. The modification involved the installation of new orifices in the test solenoids of main steam stop valves 1, 3 and 4. This change will decrease closure time to 15 seconds or less.
- 5. Revisions 0 and 1 of station modification ON-287 were completed. The modificaton involved the installation of a Calgon metering pump and mechanical mixer interlocked with the existing filter pumps on the water treatment system. When either pump is operated the metering pump and mixer will both run, and therefore will enhance the efficiency of the water treatment.
- 6. Revisions 0 and 1 of station modification OH-353 were completed. The modification added ladders and platforms to allow easier access to the reactor coolant pump motors, seals and upper oil pots.
- 7. Station modification ON-377 was completed. The modification involved the installation of pushbuttons on the heater panels to bypass the emergency high interlock on the heater extractions. This change will allov safer operation of the heaters.
- 8. Station modification ON-397 was completed. The modification 1tvolved the remachining of the #1 seal runner retainer sleeve on the eactor coolant pumps. This change will prevent the sleeve from contacting the seal ring during operation.
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2.3-2
_ _ _ . . _ _ _ _ _ . . _ _ _ Station modification ON-430 was completed. The modification involved the 9. addition of internal and external structural supports to the Alterex generator air cooler housing. This addition will reduce vibrations on the bearings. The
- 10. Revisions 0,1 and 2 of station modification ON-448 were completed.
modification involved the . revision and rewiring of the PCB breaker f ailure circuits in the 525 KV suitchyard. This change will prevent the overheating of components,
- 11. Revision 1 of station modification ON-453 was completed. The revision 2 involved the installation of check valves in the reheat stop/ intercept valve steam leakoff lines. The check valves will prevent air flow into .
the system during shutdown.
- 12. Station modification ON-474 was completed. The modification revised the The master / slave arrangement of the intercept valves in the reheaters.
change will prevent excessive flow in the reheaters.
- 13. Station modification ON-490 was completed. The modification involved the installation of a remote alarm in the guard house for the dry pipe This change will provide increased sprinkler system in the #4 warehouse.
fire protection.
- 14. Part 2 of station modification ON-493 was completed. The modification re-vised and strengthened safety related hangers.
The
- 15. Revisions 0 and 1 of station modification ON-495 was completed.
revisions involved the installation of portable shield blocks in the let-down filter hatch area to f acilitate letdown and seal supply filter changes. A new hoist was also added in this area.
- 16. Station modification ON-503 was completed. The modification replaced the annular flow elements on the A, B, D, and S extraction lines for feedwater heating with improved, stronger elements.
- 17. Revisions 0, 1 and 2 of station modification ON-504 were completed. The revisions involved the installation of additional orifices on the first stage reheat supply piping to the moisture separator reheaters to increase the sensitivity ofLthe main steam relief header leak detection system.
- 18. Revisions 1, 4, 6, 8 and 10 of Part 1 of station modification ON-507 were completed. The revisions involved various piping and electrical changes in the low pressure injection system to prevent undesired boron con-centration after a postulated loss of coolant accident.
'
- 19. Station modification ON-508 was completed. The modification involved the the
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. addition of a microwave telephone extension in'the relay house at 230 KV switchyard to facilitate fuel transfer carrier testing.-
' 20. Station modification ON-528 was completed. The modification involved the ' replacement of the reactor coolant pump. motor oil drain tank level alarms, which are also called capacitance probas, with'J0-BELL switches to reduce sensitivity and false alarms. 2.3-3 i I. I ! _ _ . ___ .-
- 21. Revisions 0,1 and 2 of statica modification ON-530 were completed. The
- rcvisions involved the installation of jib cranes above each reactor coolant pump cavity on the fourth level. The jib cranes will eliminate the need to use the polar crane for reactor coolant pump maintenance.
- 22. Station modification ON-533 was completed. The modification involved the replacement of a section of the carbon steel generator hydrogen drain line with stainless steel pipe. This change will prevent an electrically in-duced fire in the case of a line rupture.
- 23. Station modification ON-546 was completed. The modification replaced six pressurizer instrumentation root valves on the pressurizer with more reliable Kerotest valves.
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- 24. Station modification ON-562 was completed. The modification involved the installation of a manual bypass switch for the control rod mast tele-scopic cylinder down limit switch. This switch replaced the inoperative telescopic cylinder down limit switch.
- 25. Station modification ON-565 was completed. The modification replaced the power supply board in the Rosemount first stage pressure transmitter with a more reliable unit.
- 26. Station modification CN-569 was completed. The modification involved the replacement of the Electro-Hydraulic Control accumulator 2nks with AJME
, code tanks.
- 27. Station modification ON-570 was completed. The modification involved the revision of the switch logic for the " Turbine Rotor Stopped" annunciator.
For correct operation the parallel contacts were changc4 to series contac ts.
- 28. Station modification ON-571 was completed. The modification involved the replacement of Velan valves, FDW-299 and HD-100, with more reliable Kerotest valves.
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- 29. Station modification ON-572 was completed. The modification changed the reactor vessel specimen holder tubes spring cartridge assembly design.
- 30. Station modification ON-576 was completed. The modification involved installation of backup plates to stiffen the oil pans on the reactor coolant pump motor lower oil pots. The plates will reduce oil leakage from the pots.
2.3.1.1.3 Maintenance The foilowing safety related maintenance was performed during March,1976. This section excludes major safety related corrective maintenance reported in 2.3.1.1.4. During the refueling outage three feedwater nozzle flenge gaskets were replaced, one gasket.was replaced in an electrical penetration, and a seal in a Reactor Building purge valve was adjusted. The normal maintenance activities performed
- during a reactor refueling outage were also performed during this outage.
2.3-4
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DOCKET NO. 50 - 269 UNIT NfME Oconee linit 1 OllTAGES OR I 1RCED REDUCTIONS IN POWER 2.3.1.1.4 REPORT MOHTH Harch, 1976 (Over 20 Percent of Desigi Power Level and Longer Than Four Hours)
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SYSTEtt CORRECTIVE SAFETY-RELATED CAUSE OR ACTIONS MAINTENANCE DURATION REPORTABLE COMPONENT (HOURS) REASON OCCURRENCE D Al' E AlFEC1ED NUMBER _ Continuation of refueling outage 744.0 C 3/1/76
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Summary: There was no single release of radioactivity or unusual radiation exposure specifically associated with any outage which accounted for more than 10 percent of the allowable annual w values.
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& I E-OPERATOR TRAINING AND LICENSE EXAMINAll0N A-EQUlPHENT FAILURE (EXPLAIN)
F-ADMINISTRATIVE
. B-HAlNTEllANCE OR TESTING G-OPERATIONAL ERROR (EXPLAIN)
C-REFUEt!NG D-RECULATORY RESTRICTION H-0THER,(EXPLAIN) "
- 21. Revisions 0,1 and 2 of station modification ON-530 were completed. The revisions involved the installation of jib cranes above each reactor coolant pump cavity on the fourth level. The jib cranes will eliminate the need to use the polar crane for reactor coolant pump maintenance.
- 22. Station modification ON-533 was completed. The modification involved the replacement of a section of the carbon steel generator hydrogen drain line with stainless steel pipe. This change will prevent an electrically in-duced fire in the case of a line rupture.
- 23. Station modification ON-546 was completed. The modification replaced six pressurizer instrumentation root valves on the pressurizer with more reliable Kerotest valves. .
- 24. Station modification ON-562 was completed. The modification involved the installetion of a manual bypass switch for the control rod mast tele-scopic cylinder down limit switch. This switch replaced the inoperative telescopic cylinder down limit switch.
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- 25. Station modification ON-565 was completed. The modification replaced the power supply board in the Rosemount first stage pressure transmitter with a more reliable unit.
,
- 26. Station modification ON-569 was completed. The modification involved the replacement of the Electro-Hydraulic Control accumulator tanks with ASME code tanks.
- 27. Station modification ON-570 was completed. The modification involved the revision of the switch logic for the " Turbine Rotor Stopped" annunciator.
For correct operation the parallel contacts were changed to series contacts.
- 28. Station modification ON-571 was completed. The modification involved the replacement of Velan valves, FDW-299 and HD-100, with more reliable Kerotest valves.
- 29. Station modification ON-572 was completed. The modification changed the reactor vessel specimen holder tubes spring cartridge assembly design.
- 30. Station modification ON-576 was completed. The modification involved installation of backup plates to stiffen the oil pans on the reactor coolant pump motor lower oil pots. The plates will reduce oil leakage from the pots.
2.3.1.1.3 Maintenance The following safety related maintenance was performed during March,1976. This section excludes major safety related corrective maintenance reported in 2.3.1.1.4. During the refueling outage three feedwater nozzle flange gaskets were replaced, one gasket was replaced in an electrical penetration, and a seal in a Reactor Building purge valve was adjusted. The normal maintenance activities performed during a reactor refueling outage were also perforced during this outage. 2.3-4
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DOCKET NO. 50 - 269 UNIT NAME oconee tinit I OllTAGES OR flRCED RE00CT10NS IN POWER 2.3.1.1.4 REPORT MONTH Harch, 1976 (Over 20 Percent of Desiip Power Level and Longer Than Fou'r Hours) SYSTEH CORRECTIVE SAFETY-RELATED CAUSE OR ACTIONS MAINTENANCE DURATION REPORTABLE COMPONENT (HOURS) REASON OCCURRENCE DATE AffEC1ED NUMBER _ Continuation of refueling outage 744.0 C 3/1/76-1 Summary: There was no single release of radioactivity or unusual radiation expcsare specifically associated with any outage which accounted foe more than 10 percent of 'the allowable annual y values.
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& I E-0PERATOR TRAINING AND LICENSE EXAMINATIOl4 A-EQu(PHENT FAILURE (EXPLAIN)
F-ADMINISTRATIVE B-MAINTEf4ANCE OR TESTING G-OPERATIONAL ERROR (EXPLAIN) C-REFUELING D-REGULATORY RESTRICTION H-011tER ,(EXPLAIN)
2.3.1.2 Unit 2 2.3.1.2.1 Operating Experience On March 1, 1976 the unit was at 80 percent full power awaiting xenon equilib-rium. The power level was reduced to approximately 20 percent full power on the same day to return "2Bl" reactor coolant pump to service. On March 2, 1976 the unit was returned to 99 percent full power and remained at this power level until March 5, 1976 when the dispatcher ordered the power level reduced to 80% full power. The reactor was returned to 100 percent full power on March 8, 1976. On March 26, 1976 an oil pot low level alarm on "2Al" RCP resulted in a power decrease to 70 percent full power. The unit remained at 70 percent full power for the remainder of the month.
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2.3.1.2.2 Changes, Tests and Experiments not requiring prior NRC approval. The following changes, tests and experiments were carried out without prior NRC approval pursuant to 10CFR50.59 during March, 1976.
- 1. Revision 4 of station modification ON-74 was completed. This modification involved the rewiring of a heat tracing circuit on the portable deminer-alizer system in order to obtain the proper wattage.
- 2. Revisions 0, 1 and 2 of station modification SPR-193 were completed. The revisions added a permanent ammonia addition line downstream to the powdex units. The ammonia addition line will allow more accurate control of the addition of ammonia to the secondary system.
- 3. Station modification ON-570 was completed. The modification involved the revision of the switch logic for the " Turbine Kotor Stopped" annunciator.
For correct operation the parallel contacts were changed to series contacts. - 2.3.1.2.3 Maintenance The following safety related maintenance was performed during March, 1976. This section excludes major safety related corrective maintenance reported in 2.3.1.2.4. No safety related maintenance was performed. l l i ! ! 2.3-6 _- -
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DOCKET NO. 50 - 270 UitlT NAME o r. n n .w trn i r + OUTAGES OR FORCED REDUCTIONS IN POWER 2.3.1.2.4 REPORT MONTH Harch, 1976 (Over 20 Percent of Design Power Level and Longer Than Four Hours) SYSTEM SAFETY-RELATED CORRECTIVE CAUSE OR MAINTENANCE DURATION REPORTABLE ACTIONS COMPONENT AFFECTED (HOURS) REASON OCCURRENCE DATE NUMBER The "2Bl" reactor coolant pump was placed
'lhe power level was reduced from 80 13.90 B 3/1/76 in service, percent to approximately 20 percent full power to return the "2B1" reactoi coolant pump to service.
129.27 A Corrective action was taken during next 3/26/76 The power level was reduced to 70 outage which began April 7, 1976, percent full power due to an oil pot low level alarm on the "2Al" reactor coolant pump. , i Summary: There was no single release of radioactivity or unusual radiation exposure specifically associated with any outage which accounted for more than 10 percent of the allowable annual values. y Y u
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E-OPERATOR TRAINING AND LICENSE EXAMINATION A-EQulPMENT FAILURE LEXPLAIN) - F-ADMINISTRATIVE 8-MAINTENANCE OR TESTING C-REFUELING G-OPERATIONAL ERROR (EXPLAIN)
.........u.. .. . orienu et sissst et li ps ases)
2.3.1.3 Unit 3
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2.3.1.3.1 Operating Experience Oconee Unit 3 was shutdown for repair of reactor coolant pump seals until March 3, 1976. The unit reached 100 percent full power on March 9,1976 and continued operation at full power until March 20, 1976 when the unit was shut-down to remove reactor vessel surveillance specimens and work on the specimen holder tubes. The outage continued through the end of the month. 2.3.1.3.1 Changes, Tests and Experiments not requiring prior NRC approval. The following changes, tests and experiments were carried out witl out prior NRC approval pursuant to 10C7R50.59 during March, 1976. ~
- 1. Revision 5 of station modification ON-52 was completed. The revision made electrical drawing changes to reflect the as-built conditions of the interim radwaste system.
- 2. Revision 4 of station modification ON-74 was completed. This modification involved the rewiring of a heat tracing circuit on the portable deminer-alizer system in order to obtain the proper wattage.
- 3. Station modification ON-84 was completed. The modification involved the installation of a three point recorder to provide continuous recording of the quench tank temperature, pressure and level.
j 4 Revisions 0 and 1 of station modification ON-354 were completed. The revisions changed the 7 KV switchgear synchronous check circuits in order
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to eliminate synchronous check relay contact arcing.
- 5. Station modification ON-463 was completed. The modifiestion involved the remounting of the Agastat time delay relays in the Electro-Hydraulic Control system.
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- 6. Part 2 cf station modification ON-493 was completed. The modification re- >
vised and strengt.hened safety related hangers.
- 7. Revision 0 of Part 1 of station modification ON-494 was completed. The modification revised the non-saf ety-related pipe hangers.
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- 8. Revisions 0 and 1 of station modification ON-523 were completed. The
, I modification involved the connection of the Unit 3 " Seismic. Trigger" statalarm to permit intended operation.
- 9. Station modification ON-564 was completed. The modification added a check valve in the interim waste evaporator distillate recycle line downstream of LWD-678.- The check valve will prevent the discharge of evaporator feedwater into the distillate discharge line.
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2.3.1.3.3 Maintenance The following safety related maintenance was performed during March, 1976. This section excludes major safety related corrective maintenance reported in 2.3.1.3.4. Two Grinnell Saunders valves in the Coolant Storage System were repaired by replacing the diaphragas within the valves. Also, one limit switch on one of the valves had to be adjusted to prevent the valve from opening too far.
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DOCKET NO. 50 - 287 ' OUTAGES OH ! eRCED REDUCTIONS IN POWER UNIT NAME Oconee Unit 3 2.3.1.3.4 (Over 20 Percent of Desip i Power Level and Longer Than Four Hours) REPORT HONTH Harch, 1976
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SYSTEM CAUSE OR CORRECTIVE SAFETY-RELATED COMPONENT DURATION REPORTABLE ACTIONS HAINTENANCE
.DATE AFFECTED (HOURS) REASON OCCURRENCE NUMBER .
3/1/76 Continuation of previous outage 59.13 A Reactor coolant pump seals were repaired. for reactor coolant pump seal repair. 3/20/76 The unit was shutdown for removal of 271.87 H As an interim solution, the specimen the reactor vessel surveillance capsules were removed from the holder specimens and repairs to the specimen tubes. A special restraining mechanism holder tubes. was also installed on the holder tube. Also during the outage the following maintenance work was performed: 1. Fifteen valves were repaired, 2. Two body-bonnet valve leaks were repaired by replacing the gaskets, 3. One , injection orifice flange leak was repaired by replacing the flange gasket,
- 4. The O' ring in the flange on one electrical penetration was replaced.
. Summary: There was no single release of radioactivity or unusual radiation exposure specifically associated with any outage which accounted foi
. .more than 10 percent of the allowable annual
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Y 5 l A-EQUIPHENT FAILURE (EAPLAIN) E-OPERATOR TRAIMNG AND LIEENSE EkAMMi' B-MAINTENANCE OR TESTiuG F-ADn1NISTRATIVE C-REFUELING G-OPER2T10NAL ERROR (EXPLAIN) D-REGutATORY RESTRICTION H-0THER (EXPLAIN) ,
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I 2.4 REPORT FOR APRIL, 1976
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2.4.1 OPERATIONS SLM!ARY 2.4.1.1 Ur.it 1 2.4.1.1.1 Operating Experience Oconee Unit 1 Zero Power Physics testing was completed on April 4.1976. Power increase was begun as per the cycle 3 Power Escalation Test. but the unit was shutdown from 13 percent full power due to high shaf t vibration on a reactor coolant pump. The reactor coolant pumps were balanced and the unit restored. The turbine tripped as it was being brought on line because the main seal oil pump had not been started. The turbine was reset and the generator was brought ! on line. On April 6,1976, at 15 percent full power, heat balance data was taken per the Power Escalation Sequence procedure and then power was increased ~ to the 40% testing plateau. On April 8, 1976 the 40% FP PES testing was completed. Power was then increased to 75 percent full power, but due to a high incore tilt indication, caused by incorrect substitutions for failed neutron detectors in the reactor calculations package, the power was decreased to 65 percent full power. Several incore detector inputs to the reactor calculations package were deleted decreasing indicated tilt and allowing power to be returned to 75 percent full power on April 9, 1976. On April 11, 1976 a new set of correct factors were placed in the reactor calculations package resulting in a realistic and accept-able incore tilt indication. A power imbalance detector correlation was made and the 75 percent full power plateau testing was completed on April 12, 1976. Unit power was then reduced to 60 percent full power for maintenance on a feed-water pump turbine. Power was returned to 75 percent full power and held at that point to reduce imbalance. Power was increased to 90 percent full power on April 13, 1976. High turbine bearing vibrations caused a power decrease to 76 percent full power on April 14, 1976. General Electric represetitatives were contacted and 92 percent full power was established as a safe operation level. The unit was then brought to that power level. On April 18, 1976 the unit was shutdown to begin surveillance specimen holder modifications and remained shutdown for the duration of the month. 2.4.1.1.2 Changes, Tests and Experiments not requiring prior NRC approval. The following changes, tests and experiments were carried out without prior NRC approval pursuant to 10CFR50.59 during April, 1976.
- 1. Revisions 0, 1, 2, 3 and 4 of station modification ON-51 were completed.
The modification provides a system of air filtration for the fuel pool exhaust system.
- 2. Revisions 0, 1, 2 and 3 of station modification ON-284 were completed. The modification installed additional ventilation equipment to reduce the temperature in the turbine building.
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- J 3, Revision 1 of station modification ON-474 was completed. The modification revised the master / slave arrangement of the intercept valves in the re-heaters. The enange will prevent excessive flow in the reheaters.
> 4 Revision 0 of station modification ON-477 was completed. The modification involves the installation of a temperature switch and computer alarms in , the 230KV and 525KV relay houses. The alarms will provide a warning of the failure of the air conditioning system.
- 5. Revision 0 of Part 1 of station modification ON-493 was completed. The modification revised the design safety related hangers, made changes to existing hangers and installed one additional hanger. ,
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- 6. Revisions 0, 2 and 5 of Part 1 and revisions 3, 7 and 9 of Part 2 of station modification ON-507 were completed. The modification will pre-vent undesired boron concentration after a postulated loss of coolant accident.
- 7. Revision 0 of station modification ON-553 was completed. The modification involved the replacement of the internal neutral main generator busing current transformer by a shielded transformer. -
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- 8. Revision 0 of station modification ON-587 was completed. The modification relocated the 75KVA - 600V Westinghouse BT-3 transformer from the first floor of the Administration Building to the second floor.
2.4.1.1.3 Maintenance t The following safety related maintenance was performed during April, 1976. This section excludes major safety related corrective maintenance reported in 2.4.1.1.4. No safety related maintenance was performed. i 1 1 I 9 i L i 2.4-3
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DOCKET NO. 50 - 269 Oconee Unit 1 2.4.1.1.4 OUTAGES OR FORCED REDUCTIONS IN POWER UNIT NAME April, 1976 (over 20 Percent of Design Power Level and Longer Than Four Hours) RLPORT HONTil
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SYSTEM CAUSE OR CORRECTIVE SAFETY-RELATED C0tlPONENT DLRAT'.,N REPORTABLE ACTIONS HAINTENANCE DATE AFFECTED (HOURS) REASON OCCURRENCE NUMBER f
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4/1/76 Continuation of refueling outage 120.55 C 4/5/76- Unit was shutdown from 13 percent full 7.50 11 The reactor coolant pumps were balanced. power due to high shaft vibration on a reactor coolant pump. 21.73 The reactor was held at 76 percent full 4/13/76 Power was reduced f rom 90 percent full 11 power to 76 percent due to high tur- power to reduce vibrations. bine bearing vibrations, s 4/18/76 Unit was shutdown from 92 percent 297.25 B The reactor vessel specimens push rods and full power.for modification of the holders were removed, surveillance specimen holders. Summary: There was no single release of radioactivity or unusual radiation exposure specifically associated with any outage which accounted f ir , more than 10 percent of the allowable annual w values,
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A-EQUlfhEteT FAILURE (EXPLAIN) E-OPERATOR TRAINING AND*LICtNSE EXAttlNATION 0-MAINTENANCE OR TESTING F-ADnINISTRATIVE C-REFUElll4G G-CPERATIONAL ERROA (EXPLAIN)
.D-REGULATORY RESTRICTION li-0THER (EXPLAIN)
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2.4.1.2 Unit 2 2.4.1.2.1 Operating Experience The unit operated at 71 percent full power until April 7,1976 when the unit was shutdown for reactor vessel surveillance specimen holder tube modification. The unit remained shutdown for the balance of the month. 2.4.1.2.2 Changes, Tests and Experiments not requiring prior NRC approval. The following changes, tests and experiments were carried out without prior NRC approval pursuant to 10CFR50.59 during April,1976. , The modifi- -
- 1. Revisions 0 and 1 of station modification ON-47 were completed.
cation involved the addition of a three-fourths inch drain valve connection between the main turbine oil tank drain and the storage tank on the bottom of the drain line. The
- 2. Revisions 0,1, 2, 3 and 4 of station modification ON-51 were completed.
modification provides a system of air filtration for the fuel pool exhaust system.
- 3. Revision 0 of station modification ON-174 was completed. The modification involved the removal of the platform hanging below the polar crane.
The 4 Revisions 0, 1, 2 and 3 of station modification ON-284 were completed. modification installed additional ventilation equipment to reduce the. tem-perature in the turbine building.
- 5. Revision 0 of station modification ON-354 was completed. The modification involved the revision of 7 KV switchgear synchronizing check circuits to eliminate synchronized check relay contact arcing. ,
The modification
- 6. Revision 0 of station modification ON-362 was completed.
involved the addition of public address system speakers at the top and bottom of each steam generator cavity. The speakers will improve com-munication in the Reactor Building.
- 7. Station modification ON-377 was completed. The modification involved the installation of pushbuttons on the heater panels to bypass the emergency high interlock on the heater extractions. This change will allow safer operation of the heaters.
Revision 0 of station modification ON-378 was completed. The modification 8. invcived the addition of isolation valves in the generator core monitor impulce lines at a dif ferent location f rom the present isolation valves to improve access to these valvea.
- 9. Revisions 0 and 1 of station modification ON-413 were completed. The changes modify the D and E feedwater heater drain controls to allow manual control for system startup and to facilitate overall control of the heater drain system.
2.4-5
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- 10. Revision 0 of station modification ON-456 was completed. The modification added a totalizing gas meter with isolation and bypass valves to the line which supplias hydrogen to the generator,
- 11. Revision 0 of station modification ON-465 was completed. The modification involves changing a pipe hanger in the low pressure injection system to agree with design specifications and to improve nuclear safety.
- 12. Station modification ON-466 was completed. This modification involved the installation of drain piping from the emergency feedwater pump turbine atmospheric discharge to the floor drain. This change will provide a method to drain any water accumulation.
- 13. Revision 0 of station modification ON-468 was completed. The modification .
Involved the addition of diodes across the coils of relays in the Electro-Hydraulic Control system. The diodes will suppress signal spiking.
- 14. Revision 0 of station modification ON-477 was completed. The modification involves the installation of a temperature switch and computer alarms in the 230KV and 525KV relay houses. The alarms will provide a warning of the failure of the air conditioning system.
- 15. Part 2 of station modification ON-493 was completed. The modification re-vised the design of engineered safety related hangers, made changes to existing hangers and installed additional hangers.
- 16. Revisions 0 and 2 of station modification ON-496 were completed. The modification revised the unit motor operated disconnect auxiliary switches.
This change affects the operation of the generator breakers when the unit is off the line.
- 17. Revisions O and 3 of station modification ON-497 were completed. The modification involved the replacement of Veland valves, HP-154, HP-155 and HP-156, with more reliable Kerotest valves.
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- 18. Revision 0 of station modification ON-498 was completed. The modification involved the installation of a new weldolet adjacent to the relief valve on the Electro-H 7draulic Control System (EHC) piping and moved the air bleed valve on the EHC piping to reduce the vibration of the air bleed valve.
- 19. Revisions 0 and 1 of station modification ON-511 were completed. The modification involved the installation of a small access door to the feed pump turbine oil sump to facilitate sampling.
- 20. Revision 0 of station modification ON-514 was completed. The modification l involved the installation of low point drains on the feedwater pump turoine steam sealing exhaust lines.
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- 21. Revision 0 of station modification ON-517 was completed. The modification replaced the existing Cutler Hammer switch operators with new series A-3 operators. This change will provide more reliable switch operation.
- 22. Revision 0 of station modification ON-565 was completed. The modification I
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replaced the power supply board in the Rosemount-first stage pressure l transmit ter with a more reliable unit. '
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- 23. Revision 0 of station modification ON-587 was completed. The modification floor relocated the 75KVA - 600V Westinghouse BT-3 transformer from the first of the Administration Building to the second floor.
- 24. Revision 0 of station modification ON-591 was completed. The modification involved the replacement of the "2A2" feedwater heater Magnatrol isolation ,
valve with Kerotest valves. 2.4.1.2.3 Maintenance The following safety related maintenance was performed during April, 1976. This section excludes major safety related corrective maintenance reported i in 2.4.1.2.4. . During the April and May outage for spacimen holder tube modification and during the refueling outage that immediately followed, 75 safety related valves were repaired. All of the repairs were minor. Minor repairs were also made to a reactor building cooling unit, a transformer, the polar crane,
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the control-rod drive mast, one HPI Pump, one power-circuit breaker, the
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personnel hatch, the shutdown panel, three pipe flanges, and two electrical penetrations. All safety related hydraulic suppressors were inspected and repaired during i this outage. i'
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DOCKET NO. 50 - 270 2 .1.1. 0 2 .'4 OUIAGt'S OR FORCED REDUCTIONS IN POWER UNIT NAttE oconee Unit 2
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(Over 70 Percent of Design Power Level and Longer Than four llours) REPORT HotlTH April, 1976
!SYSTEM CAUSE OR CORRECTIVE SAFETY-RELATED
' l COMPONENT DURATION REPORTABLE ACTIONS MAINTENANCE
- DAIE AFFECTED (NOURS) REASON OCCURRENCE I. HUMBER 16
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161.30 A Corrective action was taken during next 4/1/76 Continuation of previous reduction in I power for low oil level in"2Al" outage. reactor coolant pump upper oil pot. 1 Unit shutdown f rom approxin.Mely 71 558.72 C The reactor vessel specimen holder tubes i4/7/76 were removed. Oil was added to the "2Al" l percent full power for reactor vessel reactor coolant pump upper oil pot, i surveillance holder tube modification. j t
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Summary: There was no single release of radioactivity i or unusual radiation exposure specifically associated with any outage which accounted foi
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more than 10 percent of the allowable annual values. l. N
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A-EQUIPMENT FAILURE (EXPLAIN) E-OPERATOR TRAINING AND LICEN5E [XAMINATION
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8-MAINTENANCE OR TESTING F-ADMINISTRATIVE C-REFUELING C-0PERATIONAL ERROR (EXPLAIN)
- D-REGULATORY RESTRICTION H-0THER (EXPLAIN)
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2.4.1.3 Unic 3 2.4.1.3.1 Operating Experience Following completion of maintenance on the reactor vessel specimen holder tubes, heatup was begun on April 17, 1976. The unit reached 100 percent full power on April 19, 1976. On April 20, 1976 the unit tripped due to a Reactor Protective System flux /fiow imbalance. Power level was returned to 95 percent full power on April 21, 1976. During the performance of a test on the backup power supply to che control roa drives on April 22, 1976, control rod group 7 dropped into the core from a 15 percent withdrawn position resulting in a reactor power runback to 75 percent ~ full power. The problem was identified as a defective relay, which was replaced. The unit returned to 94 percent full power on April 23, 1976. On April 27, Ja76 a feedwater flow alarm was received indicating high flow in the "A" feedwater loop. Power was reduced to 60 percent full power. The problem was identified as an instrument malfunction and was corrected. The unit returned to 94 percent full power on April 28, 1976 and remained at this power level through the end of the month. 2.4.1.3.2 Changes, Tests and Experiments not requiring prior NRC approval. The following changes, tests and experiments were carried out without prior NRC approval pursuant to 10CFR50.59 during April,1976.
- 1. Revision 1 of station modification ON-13 was completed. The modification replaced the first stage pressure transmitters with Rosemount transmitters.
- 2. Revisions 0, 1, 2, 3 and 4 of station modification ON-51 were completed.
The modification provides a system of air filtration for the fuel pool ex-haust system. Revisions 0,1, 2 and 3 of station modification ON-284 were completed. The 3. modification installed additional ventilation equipment to reduce the temperature in the Turbine Building.
- 4. Revisions 0 and 1 and Parts 1, 2 and 3B of station modification ON-401 were completed. The modification increased the storage capacity of the Unit 3 All spent fuel pool from 216 to 480 assemblies by installing new racks.
questions of nuclear safety were evaluated and prior NRC approval was obtained.
- 5. R3 visions 0,1, 2, 3 and 4 of station modification ON-417 were completed.
The modification added a rotary actuator to the door of the emergency hatches. The change will eliminate the bounce of the door when it hits the seals.
- 6. Revision 0 of station modification ON-477 was completed. The modification involves the installation of a temperature switch cri computer alarms in the 230KV and 525KV relay houses. The a?. arms will provide a warning of possible air conditioning system failure.
- 7. Revision 0 of station modification ON-565 was completed. The modification
! replaced the power supply board in the Rosemount first stage pressure transmitter with a more reliable unit. 2.4-9
- 8. Revision 0 of station modification ON-570 was completed. Tha modification involved the revision of the switch logic for the " Turbine Rotor Stopped" annunciator. For correct operation the parallel contacts were changed to series contact.
- 9. Parts 1 and 2 of station modification ON-582 were completed. The modifi-cation involved the installation of spring cartridge adapters on the reactor vessel speciment holder tubes. The reactor vessel surveillance specimen holder tube was cut at approximately the six and one-half feet level from the core support flange to facilitate the installation. Prior FRC approval of this modification was obtained.
- 10. Revision 0 of station modification ON-587 was completed. The modification -
relocated the 75KVA - 600V Westinghouse BT-3 transformer from the first floor of the Administration Building to the second floor. 2.4.1.3.3 Maintenance The following safety related maintenance was performed during April,1976. This section excludes major safety related corrective maintenance reported in 2.4.1.3.4. ' The concentrated boric acid storage tank pump "3A" had to be timed because it did not pump properly. The motor failed in one ES valve (3 PR-6) and had to be relaced. One RC System valve had a packing leak. The valve was replaced with a diaphragm sealed valve. 2.4-10
DOCKET NO. 50 -287 '2.4.1.3.4 UNIT NAME Oconee Unit 3 OUTAGES Olt FORCED REDUCTIONS IN POWER REPORT MONTH April, 1976 (Over 20 Percent of DesiUn Power Level and Longer Than fou6- Hour.) SYSIEM SAFETY-RELATED CORRECTIVE
.CAUSE / OR MAINTENANCE DURAT10N REPORTABLE ACTIONS
. COH1'ONt NT AFFECTED (HOURS) REASON OCCURRENCE D/ 11 NUMBER
_ 405.78 11 See March, 1976 corrective action. 4/1/76 Continuation of previous outage. 6.11 Investigation revealed no cause for the 4/20/76 Reactor tripped from 97 percent full G incident. power on Reactor Protective System Flux / Flow / Imbalance. 5.84 RO 287/76-4 Def ective relay which caused the control 4/22/76 Power runback from 100 percent to 75 B rod drop was replaced. percent tuli power due to a control xod group 7 drop during a hapkup power supply test.
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Summary: There was no single release of radioactivity or unusual radiation exposure specifically associated with any outage which accounted fo r
." more than 10 percent of the allowable annual values.
7 l U ELDPERATOR TRAINING AND LICEN5E EXAMINATION A-EQulPHENT FAILURE (EXPLAIN) B-MAINTENANCE OR 1ESTING F-ADMINISTRATIVE C-REFUELING G-0PERATIONAL ERROR (EXPLAIN) 0-R[tuLA10RY RESTRICTION N-0THER (EMPLAIN)
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2.5 REPORT FOR MAY, 1976
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SUMMARY
2.5.1.1 UNIT 1 2.5.1.1.1 Operating Experience The outage for specimen holder tube modification continued until May 31, 1976 when criticality was attained. However, the reactor tripped from 14 percent full power on high reactor coolant system pressure when FWPT 1A lost speed as its steam supply was swapped from startup steam to extraction steam. The reactor was restarted and the unit reached approximately 50 percent full power by the end of the month.
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2.5.1.1.2 Changes, Tests and Experiments not requiring prior NRC approval. The following changes, tests and experiments were carried out without prior NRC approval pursuant to 10CFR50.59 during May,1976.
- 1. Revision 5 of station modification ON-98 was completed. The modification made various system improvements to the non-radioactive liquid wastewater treatment system.
- 2. Revision 0 of station modification ON-131 was completed. The modification shortened the system of cable drape on the refueling bridge and provided a sliding anchor system for attaching safety belts. These changes will provide added safety for personnel working near the refueling bridge.
- 3. Revision 0 of station modification ON-236 was completed. The modification involved the installation of fans and relief vents to avoid heat buildup in '
the leakrate compressor building.
- 4. Revisions 0 and 1 of station modification ON-263 were completed. The modification involved the installation of two isolation valves between the Unit 1 and Unit 2 reactor coolant bleed storage header and the reactor coolant bleed flush header.
- 5. Revision 0 of station modification ON-368 was compl'eted. The modification revised the control rod drive logic so that rod groups 1, 2, 3 and 4 are not controlled by the Integrated Control Syerem. These gro~ups will be controlled
'by the operator in the manual sequence override mode.
- 6. Revision i of station modification ON-403 was completed. The modification involved the installation of a service air system to allow the use of port-able pneumatic tools.
- 7. Revision 0 of station modification ON-437 was completed. The modification installed a temporary reactor coolant bleed evaporator feed pump stator assembly. A permanent stator will be installed when it is available. A review determined that there were no nuclear safety implications.
8 Revisions 0 and 1 of station modification ON-443 was completed. The modification replaced the inboard reactor coolant pump seal supply filter isolation valves with more reliable Westinghouse valves.
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2.5-2
The
- 9. Revisions 0 and 1 of station modification ON-449 were completed.
modification added level switches to the turbine drain pots for the "C" bleed lines.
- 10. Revision 0 of station modification ON-450 was completed. The modification installed a deflector plate around the quench tank rupture disc.
The
- 11. Revisions 0 and 1 of station modification ON-511 were completed.
modification installed a small access door to the feed pump turbine oil sump to facilitate sampling.
- 12. Revision 0 of station modification ON-517 were completed. The modification replaced the existing Cutler Hammer switch operators with new series A-3 ,
operators. This change will provide more reliable switch operation.
- 13. Revision 0 of station modification ON-601 was completed. The modification installed a two inch brass globe isolation valve downstream of the polymer pump storage tank outlet which is located in the interim liquid radwaste solidification unit.
- 14. Revision 0 of station modification ON-610 was completed. The modification involved the removal of the control room statalarm indicating feedwater heater panel trouble. The alarm continuously gave faulty indications.
2.5.1.1.3 Maintenance This The following safety related maintenance was performed during May,1976. section excludes major safety related corrective maintenance reported in 2.5.1.1.4. During the month of May one saf ety related valve in the HP1 System was repacked. 2.5-3 J
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DOCKET NO. 50 - 269 OUTAGES OR FORCED REDUCTIONS IN POWER UNIT NAME Oconee Unit I 2.5.1.1.4 (Over 20 Percent of Design Power Level and Longer Than Four Hours) REPORT MONTH May, 1976 SYSTEM CAUSE OR CORRECTIVE SAFETY-RELATED
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COMPONENT DURATION REPORTABLE ACTIONS MAINTENANCE DATE AFFECTED (HOURS) REASON OCCURRENCE NUMBER 5/1/76 Continuation of previous outage. 736.47 B See corrective action in April, 1976.
~5/31/76 Reactor tripped from approximately 1.97 11 The operating procedure was changed to assure 14 percent f ull power due to high extraction steam was at correct pressure reactor coolant pressure when feed- before switch was made.
water pump turbine "lA" lost sned as its steam sunniv was switched from startun steam to ext ract ion steams. . Summary: There was no sincle release of radioactivity or unusual radiation exnosure snecifically associated with any outaue which accounted f or y
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more than 10 nercent of the allowable annual j, values. I A-EQUlPMENT FAILURE (EXPLAIN) E-OPERATOR TRAINING AND LICENSE
- EXAMINATION i
' 3-KAINTENANCE OR TESTING F-ADMINISTRATIVE C-REFUELING G-OPERATIONAL ERROR (EXPLAIN) a .,i n.ai,m v us ii.iriq,ui ii ) tiiis (i vs.: aq ))
.
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2.5.1.2 Unit 2 2.5.1.2.1 Operating Experience Repairs Octnee Unit 2 remained shutdown for the ratire month of May,1976. were made to the reactor vessel surveil'ance specimen holder tubes and on May 15, 1976 refueling for Cycle 2 war hagun. 2.5.1.2.2 Changes, Tests and Experiments not requiring prior NRC approval. l The following changes, tests and experiments were carried out without prior NRC approval pursuant to 10CFR50.59 during May, 1976.
-
The
- 1. Revisions 0,1 and 2 of station modification ON-68 were completed.
modification consisted of adding a two-ton jib crane in the reactor building. The crane will expedite maintenance activities. The modification
- 2. Revision 5 of station modification ON-98 was completed.
made various system improvements to the non-radioactive liquid wastewater treatment system.
- 3. Revision 0 of station modification ON-236 was completed. The modification involved the installation of fans and relief vents to avoid heat buildup in the leakrate compressor building.
- 4. Revision 0 of station modification ON-739 was completed. The modification added a control rod mast reset button to the main fuel bridge controls for improved operation of fuel crane.
- 5. Revision 0 and 1 of station modification ON-263 were completed. The modifi-cation involved the installation of two isolation valves between the Unit 1 and Unit 2 reactor coolant bleed storage header and the reactor coolant bleed flush header.
The modification
- 6. Revision 0 of station modification ON-303 was completed.
involved the addition of weight to the inner basket of the east and west fuel transf er baskets to shif t the center of gravity so the basket would not be top heavy.
- 7. Revision 0 of station modification ON-329 was completed. The modification added a 15 second time delay relay in the frame down-carriage movement cir-cuit of the fuel transfer system. The change will prevent the movement of the carriage before the frame is completely down.
- 8. Revision 0 of station modification ON-366 was completed. The modification altered Reactor Building cooling fan logic to assure that all fans at The new operate at slow speed on receipt of an engineered safeguard signal. <
logic will reflect FSAR requirements.
- 9. Revision 0 of station modification ON-368 was completed. The modification revised the control rod drive logic so that rod groups 1, 2, 3 and 4 are not controlled by the Integrated Control System. These groups will be controlled by the operator in the manual sequence override mode.
2.5-5
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- 10. Revision 2 of station modification ON-370 was completed. The modification deleted the auto-start on creep function on the reactor coolant pump oil lif t AC circuits and added a three minute time out on the DC lif t pumps.
This change will facilitate the control and monitoring of the oil lift pump operation,
- 11. Revision 1 of station modification ON-379 was completed. The modification added radial retainer clips on the thrust runner air seal in the reactor coolant pump motor oil system to prevent fretting of the seal ring and the loss of oil from the upper oil pot.
- 12. Revision 1 of station modification ON-403 was completed. The modification involved the installation of a service air system to allow the use of pneumatic tools.
,
- 13. Revision 0 to station modification ON-430 was completed. The modification added internal and external structural supports to the generator excitor.
- 14. Revision 0 of station modification ON-437 was completed. The modification installed a temporary reactor coolant bleed evaporator feed pump stator assembly. A permanent stator will be installed when it is available. A review determined that there were no nuclear safety implications.
- 15. Revisions 0 and 1 of station modificatior. ON-449 were completed. The modification added level switches to the turbine drain pots for the "C" bleed lines.
- 16. Revision 1 of station modification ON-453 was completed. The modification involved the installation of check valves in the reheat stop intercept valve steam leakoff lines from the high pressure turbine to the low pressure turbine to prevent air leakage to condenser steam leakoff line.
- 17. Revisions 0 of station modification ON-458 was completed. The modification rerouted the emergency feedwater bypass line around the tendon anchor.
- 18. Revision 0 and 1 of station modification ON-500 were completed. The modification replaced the existing main fuel bridge control rod grapple with an improved model.
- 19. Station modification ON-503 was completed. The modification replaced the annubar flow elements on the A, B, D, and E extraction lines for feedwater heating with improved stronger elements.
- 20. Revision 0 of station modification ON-512 was completed. This modification involved the replacement of the existing reactor coolant pressure trans-mitters with more reliable Rosemount transmitters.
'
- 21. Revision 0 of station modification ON-522 was completed. The modification involved removing the floor slab from the Reactor Building stairway opening to the basement area and properly storing the slab. Remo al of the slab
-will facilitate maintenance activites and has no safety-related implications.
2.5-6
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- 22. Revision 0 of station modification ON-528 was completed. The modification involved the replacement of the roactor coolant pump motor oil drain tank level alarms, which are also called capacitance probes, with J0-BELL switches to reduce sensitivity and false alarms.
- 23. Revision 0 of station modification ON-533 was completed. The modification involved the replacement of a section of the carbon steel generator hydrogen drain line with stainless steel pipe. This change will prevent an electri-cally induced fire in the case of a line rupture.
- 24. Revision 0 of station modification ON-553 was completed. The modification involved the replacement of the internal neutral main generator bushing cur-rent transformer by a shielded transformer,
.
- 25. Revision 0 of station modification ON-557 was completed. The modification added a relay in each gate drive assembly of control rod groups 5, 6, 7 and in the auxiliary supply.
- 26. Revision 0 of station modification ON-569 was completed. The modification involved the replacement of the Electro-Hydraulic Control accumulator tanks with ASME code tanks.
- 27. Revision 0 of station modification ON-574 was completed. The modification upgraded the isolated phase bus duct that extends from the generator to the turbine. The change replaced the isolated phase bus duct linkages with external linkages and the duct damper pivot shafts with stronger shafts.
- 28. Revision 0 of station modification ON-576 was completed. The modification involved installation of backup plates to stiffen the oil pans on the reactor coolant pump motor lower oil pots. The plates will reduce oil leakage f rom the pots.
- 29. Revision 0 of station modification ON-589 was completed. The modification involved the addition of an inspection port in the low pressure turbine ex-haust piping to f acilitate inspection of valves 2LPE-8 and 2LPE-10 .
- 30. Revision 0 of station modification ON-609 was completed. The modification involved the replacement of Velan valves FS/2/51/290 and FS/2/51/28 with more reliable Kerotest valves.
2.5.1.2.3 Maintenance The following safety related maintenance was performed during May, 1976. This section excludes major safety related corrective maintenance reported in 2.5.1.2.4. Saf ety related maintenance performed during May,1976 is listed under the maintenance section for April, 1976. 2.5-7
_ _. _ _. - _ . . _ _ . _ _. . . .
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DOCKET AG. 50 - 270
~ 2.5.1.2.4' _0UTAGES O'R FORCED REDUCTIONS IN POWER UNIT hAME oconee Unit 2 (Over 20 P'ercent of Design Power Level and Longer Than Four Hours) REPORT MONTH May, 1976 1
SYSTEM CAUSE OR- SAFETY-RELATED
, CORRECTIVE.
COMPONENT DURATION REPORTABLE ACTIONS MAINTENANCE DATE AFFECTED (HOURS) REASON OCCURRENCE l NUMBER I 5/1/76. Continuation of previous outage. 360.0 A See corrective action in April, 1976. 5/15/76 Refueling outage. 384.0 C 4 5 I
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Summary: There was no single release of radioactivity y or unusual radiation exposure specifically
*
, associated with any outage which accounted for
. J: more than 10 percent of the allowable annual values, t
.
, A-i(USPr. INT FA..uhi (i.u tA 4 N) i-O?;&ATGn TAA..thG AND LICEh5E EXAMINATION 3-MA:NTENANCE OR TESTIN; F-A3r.: .;ST?.ATIVE C-REFbEw.NG 0-CPERAT G?.AL ERROR (EXPLAIN) D-REGULATORY RESTRICTICh H-0THER (EXPLAIN)
.
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2.5.1.3 Unit 3 2.5.1.3.1 Operating Experience Oconee Unit 3 began the month at 94 percent full power due to a reactor coolant flow problem which was under evaluation. On May 2, 1976 power was increased to 99 percent full power and remained between 97 percent and 99 percent full power until May 5, 1976. On May 5, 1976, the Unit 3 on-line computer calculation for reaccct coolant flow was updated to reflect the best available data resulting in an indicated power of 93 percent full power. The power level was increased to 100 percent full power by May 7,1976 and remained at that level for the re-mainder of the month. ~ 2.5.1.3.2 Changes, Tests and Experiments not requiring prior NRC approval. prior NRC The following changes, tests and experiments were carried out withor _ approval pursuant to 10CFR50.59 during May,1976. The modification
- 1. Revision 5 of station modific stion ON-98 was completed.
made various system improvements to the non-radioactive liquid wastewater treatment system. Revision 4.of station modification ON-369 was completed. The revision con-2. sisted of various drawing carrections to the Keowee Pilot wire monitor relay.
- 3. Revision 1 of station modification ON-403 was completed. The modification involved the installation of a service air system to allow the use of port-able pneumatic tools.
- 4. Revision 0 of station modification ON-437 was completed. The modification installed a temporary reactor coolant bleed evaporator feed pump stator A assembly. A permanent stator will be installed when it is available.
review determined that there were no nuclear safety implications. 2.5.1.3.3 Maintenance This The following safety related maintenance was performed during May,1976. section excludes major safety related corrective maintenance reported in 2.5.1.3.4. No safety related maintenance was performed. 2.5-9
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DOCKET NO. 50 - 287 OUTAGES OR FORCED REDUCTIONS IN POWER UNIT NAME n , n n . ,,, uns, 3 2.5.1. 3. 4 May, 1976 (Over 20 Percent of Design Power Level and Longer Than Four Hours) REPORT MONTM
/
SYSTEM CAUSE OR CORRECTIVE SAFETY-REL TED COMPONENT DURATION REPORTABLE ACTIONS MAINTENANCE DATE AFFECTED (HOURS) REASON OCCURRENCE NUMBER
,
I summarve There was no sinele release of radioactivity , or unusua1 radlation exposure snecifica11v associated with any ouraee which accounted for more than 10 percent of the allowable annual y values. No outages or forced ' reductions in power *
*
,
this month. '
+
l A-EQUIPMENT FAILURE (EXPLAIN) E-OPERATOR TRAINihG AND LICENSE EXAMINATION
- B-MAINTENANCE OR TESTING F-ADMINISTRATIVE C-REFUELlHG G-OPERATIONAL ERROR (EXPLAIN) u ninin fivesann!
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i 2.6 REPORT FOR JUNE, 1976 O
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l I i t l l l i 2.6-1 _
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2.6.1 OPERATIONS
SUMMARY
2.6.1.1 Unit 1 2.6.1.1.1 Operating Experience The unit operated at 100 percent full power until June 3,1976 when power was reduced to 75 percent full power for a core physics test. The unit returned to 100 percent f ull power the same day. On June 8,1976, the unit tripped due to a Group 5 control rod drop. Full powcr operation was again reached on June 9, 1976 and continued until shutdown was required on June 21, 1976 to repair a leak on a turbine generator bearing oil supply line. The unit was returned to full power the same day. On June 27, 1976 the unit - tripped due to the failure of a reactor coolant system flow indicator. The unit returned to 90 percent full power to await xenon equilibrium on the same day and was returned to 99 percent full power on June 28, 1976. The unit operated at full power for the remainder of the month. 2.6.1.1.2 Changes, Tests and Experiments not requiring prior NRC approval. The following changes, tests and experiments were carried out without prior NRC approval pursuant to 10CFR50.59 during June, 1976.
- 1. Revision 1 of station modification ON-471 was completed. The modification extended the security f ence behind the hydrogen storage tanks to allow for an enclosed area for materials storage.
- 2. Revision 0 of station modification ON-624 was completed. The modification upgraded the Keowee Unit 1 turbine guide bearing oil cooler by replacing the heat exchangers in the oil cooler.
2.6.1.1.3 Maintenance i The following safety related maintenance was performeo during June,1976. This section excludes major safety related corrective maintenance reported in 2.6.1.1.4. The diaphragm in concentrated boric acid storage tank pump "3A" had to be replaced.
.
2.6-2
. DOCKET NO. 50 - 269 UNIT NAME Oconee Unit I OUTAGr5 OR FORCED REDUCTIONS IN POWER 2.6.1.1.4 RIPORT HONTH June, 1976 (Over 20 l'ercent of Design Power Level and Longer Than Four Hours) SYSll H CORRECTIVE SAFETY-RELATED CAUSE OR ACTIONS HAINTENANCE DURATION REPORTAlLE C 0llPONI N T AFFECIlp (HOURS) REASON OCCURREdCE Di.t l NUMBER
._.
A complete checkout of the CRD power supply Reactor tripped from 100 percent full 11.00 11 revealed no reason for the drop. 6/8/76 power due to a group 5 control rod drop during movement testing. 6.28 A Leak repaired. Also balanced turbine generator 6/21/76 Unit was taken off line to repair shaft. leak on #12 turbine generator bearing oil supply line. The PPS Channel E Loop A signal amplifier Unit tripped due to the failure of the 4.44 A 6/27/76 was replaced. RPS Channel E Loop A flow signal. t Summary: There was no single release of radioactivity or unusual radiation exposure specifically y associated with any outage which accounted for p more than 10 percent of the allowable annual l a values. A-EQulPMENT FAILURE (EXPLAIN) E-OPERATOR TRAINING AND LIEENSE EXAMINAT10N 8-MAINTENANCE OR TESTING F-ADMINISTRATIVE C-REFUELING G-OPERATIONAL ERROR (EXPLAIN) H-0THER (EXPLAIN) D-REGULATORY RESTRICTION
.
I . 2.6.1.2 Unit 2 2.6.1.2.1 Operating Experience Unit 2 was in annual refueling shutdown for the entire month of June,1976. 2.6.1.2.2 Changes, Test and Experiments not requiring prior NRC approval. The following changes, tests and experiments were carried out without prior NRC approval pursuant to 10CFR50.59 during June,1976.
- 1. Revision 1 of station modification ON-192 was completed. The modification replaced the speed reference board of the main turbine speed controller to put the turbine on hold at 800 rpm versus 500 rpm during unit startup. -
- 2. Revision 0 of station modification ON-234 was completed. The modification involved the installation of new crifices in the test solenoids of main steam stop valves 1, 3 and 4. This change will assure closure time of less than 15 seconds and also prevent valves from slamming closed.
- 3. Revisions 0,1, 3 and 4 of station modification ON-417 were completed. The modification added a rotary actuator to the emergency hatch door. The
,
addition will eliminate bounce of the door when it hits the seals.
- 4. Revision 0 of station modification ON-441 was completed. The modification involved the replacement of a single turn potentiometer in the closing bias assembly of the turbine Electro-Hydraulic Control System with a ten turn potentiometer. The change will allow finer adjustment of the assembly.
- 5. Reviatons 0 and 1 of station modification ON-443 were completed. The modification replaced the inboard reactor coolant pump seal supply filter isolation valves with more reliable Westinghouse valves.
- 6. Revisions 0 and 1 of station modification ON-471 were completed. The modification extended the security f ence behind the hydrogen storage tanks ;
to allow for an enclosed storage area for materials storage. l
- 7. Revisions 0 and 1 of station modification ON-474 were completed. The l
modification revised the master / slave arrangement of the intercept valves in the reheaters. The change will prevent excessive flow in the reheaters.
- 8. Revisions 1 and 2 of station modification ON-479 were completed. The modification replaced the stop check valve 2HP-283 with a more reliable Kerotest check valve and a Kerotest globe valve. )
I
- 9. Revisions 0 and 1 of station modification ON-495 were completed. The revisions involved the installation of portable shield blocks in the letdown filter hatch area to facilitate letdown and seal supply filter changes. A new hoist was also added in this area.
,
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2.6-4 -
- 10. Revisions 1, 4, 6, 8 and 10 of Part 1 of station modification ON-507 were' comp.leted. The revisions involved various piping and electrical changes in the low pressure injection system to prevent undesired boron concentration after a postulated loss of coolant accident.
- 11. Revision 0 of station modification ON-606 was completed. The modification removed the reactor vessel surveillance specimen holder tubes.
- 12. Revision 0 of station modification ON-610 was completed. The modification will prevent the f eedwater heater hi-lo statalarms from ar.tuating the control room heater panel.
- 13. Revision O of station modification OL '24 was completed. The modification '
involved the upgrading of the Keowee Un .t 1 turbine guide bearing oil cooler by replacing the heat exchangers in the oil cooler. 14.-Revisions 0 and 1 of station modificction ON-627 were completed. The modifi-cation involved changes to the Grinnell shock suppressors on the pres-surizer piping which increased the overall length of the suppressors to allow proper tension settings to be made. 2.6.1.2.3 Maintenance This The following safety related maintenance was performed during June,1976. section excludes major safety related corrective maintenance reported in 2.6.1.2.4. Saf ety related maintenance performed during June,1976 is listed under the maintenance section for April,1976. 2.6-5
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DOCKET NO. 50 - 270 3.6.1.2.4 OUTAGES OR FORCED REQUCTIONS IN POWER LAIT NAME _ Oconee Unit 2 (Over 20 Percent of Design Power Level 'and Longer Than Four Hours) REPORT MONTH _i,,n,. iq76
'
l SYSTEM i CAUSE OR ; CORRECTIVE. SAFETY-RELATED COMPONENT DURATION REPORTABLE ACTIONS MAINTENANCE DATE AFFECTED (HOURS) REASON' OCCURRENCE NUMBER I 6/1/76 Continuation of refueling outage. 720 C
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i s' i Summary: There was no single release of radioactivity or unusual radiation exposure specifically associated with any outage which accounted foi more than 10 percent of the allowable annual y values. 6- !
. I A-dib.Pr. INT FA..uRi (EXP6AIN) E-CPLr$TO.4 TAA.?.thG AND LICENSE EXAM 4 NATION i B-MAINTEt4ANCE OR TESTING F ~ J.*.iiii STRATIVE C-REFLEL;NG G-CPERATiGNAL ERROR (EXPLAlti)
D-REGULATORY RESTRICTION H-0THER (EXPLAIN)
.
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2.6.1.3 Unit 3 2.6.1.3.1 Operating Experience The unit operated at essentially 100 percent full power until June 15, 1976 when the "3B" feedwater pump turbine tripped causing a forced reduction to 67 percent full power. The turbine was reset and power was increcsed to 80 percent full power to await xenon equilibrium. Full power operation was resumed on June 16, 1976 and the unit remained at 100 percent full power for the remainder of the month. 2.6.1.3.2 Changes, Tests and Experiments not requiring prior NRC approval.
- The following changes, tests and experiments were carried out without prior NRC approval pursuant to 10CFR50.59 during June, 1976.
- 1. Revision 0 of Part 4 of station modification ON-401 was completed. The modification increased the storage capacity of the Unit 3 spent fuel pool from 216 to 480 assemblies by installit.g new racks. All questions of nuclear safety were evaluated and prior NRC approval was received.
- 2. Revisions 0 and 1 of station modification ON-471 were completed. The modification extended the security fence behnd the hydrogen storage tanks to allow for an enclosed area for material storage.
- 3. Revision 0 of station modification ON-624 was completed. The modification upgraded the Keowee Unit 1 turbine guide bearing oil cooler by replacing the heat exchangers in the oil cooler.
o 2.6.1.3.3 Maintenance The following safety related maintenance was performed during June, 1976. This , section excludes major safety related corrective maintenance reported in 2.6.1.3.4. No safety related maintenance was perforned. < 2.6-7
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DOCKET NO. 50 - 287 OUTAGES OR FORCED REDUCTIONS IN POWER UNIT NAME oconee Unit 3 2.6.1.3.4 (Over 20 Percent of Design 'ower Level and Longer Than Four Hours) REPORT HONTH June, 1976 SYSTEM CAUSE OR CORRECTIVE SAFETY-RELATED COMPONENT DURATION REPORTABLE ACTIONS MAINTENANCE DATE AFFECTED (HOURS) REASON OCCURRENCE NUMBER 1 Summary: There was no single release of radioactivity or unusual radiation exposure specifically associated with any outage which accounted for more than 10 percent of the allowable ar.nual values. No outages or forced reductions in power longer than four hours decurred this F month. T
=
A-EQUlPMENT FAILURE (EXPLAIN) E-OPERATOR TRAINihG AND LICENSE EXAMINATION
- B-MAINTENANCE OR TESTING F-ADMINISTRATIVE
"
C-REFUELING G-OPERATIONAL ERROR (EXPLAIN)
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I 2.7 REPORT FOR JUI.Y,1976
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O l 2.7-1 ,
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2.7.1 OPERATIONS SC0fARY 2.7.1.1 Unit 1 2.7.1.1.1 Operating Experience Oconee Unit 1 began the month of July at 100 percent full power. On July 7, 1976, the reactor tripped on high pressure due to the valving out of a turbine header pressure transmitter. The unit was brought back on line the same day and reached 100 percent full power on July 9,1976. On July 14, 1976, the loss of manual Integrated Control System power caused the reactor to trip on high pr es sure . The unit was brought back on line the same day, reached 100 percent ! power on July 15, 1976, and remained at 100 percent power for the remainder of - the month. 2.7.1.1.1 Changes, Tests and Eaperiments not requiring prior NRC approval. The following changes, tests and experiments were carried out without prior NRC approval pursuant to 10CFR50.59 during July, 1976.
- 1. Revision 4 of station modification ON-284 was completed. The modification installed additional ventilation equipment to reduce the temperature in the Turbine Building.
- 2. Revision 1 and 2 of station modification ON-330 was completed. The modifi-catior. involved the construction of a fire barrier, with a roof, around the existing oil and grease storage area in the turbine building basement.
- 3. Revision 0 of station modification ON-586 was completed. The modification involved the reconnection of directional ground relays which initiate automatic reclosing on Jocassee breakers. The change was made to correct a design discrepancy.
- 4. Revision 0 of station modification ON-608 was completed. The modification added a manual bypass switch on the main fuel bridge to simulate fuel mast grapple tube down; when the grapple tube is down, the limit switch is inoperable.
- 5. Revision 0 of station modification ON-612 was completed. The modification involved the installation of a "T" connection and one-fourth inch tubing to provide for a caustic injection pump pressure gauge.
- 6. Revision 0 of station modification ON-633 was completed. The revision added gravel to the bottom of the protected area fence.
- 7. Revision 0 of station modification ON-637 was completed. The modification added a temporary off-line radiation monitor in parallel with radiation monitors RIA 33 and 34. The off-line monitor will monitor total liquid ef-fluent released from the station and these values will be correlated with the on-line monitors and laboratory samples.
2.7-2
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2.7.1.1.3 Maintenance The following safety related maintenance was performed during July,1976. , This section excludes major safety related corrective maintenance reported in 2.7.1.1.4. Two Grinnell Saunders valves in the Coolant Storage System were leaking past the seats. The valves were repaired by replacing the diaphragms. , j i i e i 0 1
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'2.7-3
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DOCKET NO _ 2.7.1.1.4 Oconee Unit 1 OUTAGES OR FORCED REDUCTIONS IN POWER UNIT NAME (Over 20 Percent of Design Power Level and Longer Than Four Hours) REPORT MONTH i,,1 y . 1976 SYSTEM CAUSE OR CORRECTIVE SAFETY-RELATED COMPONENT DURATION REPORTABIE ACTIONS MAINTENANCE DATE AFFECTED (HOURS) REASON OCCURRENCE NUMBER '7/7/76 Reactor tripped from 100 percent full 8.63 G Administrative action was taken which included power due to the valving out of a a training session and procedure change, turbine header pressure transmitter. 4.11 G The ICS hand power circuit breaker was reset anc 7/14/76 Reactor tripped from 100 percent full power during maintenance on the the power outlet causing overload was removed. Integrated Control Sy. item due to overloaded circuit. Summary: There was no single release of radioactivity or unusual radiation exposure specifically associated with any outage which accounted for more than 10 percent of the allowable annual
.N values.
Y
> l A-EQUIPMENT FAILURE (EXPLAIN) E-OPERATOR TRAINING AND LICENSE EXAMINATION 8-MAINTENANCE OR TESTING F-ADMINISTRATIVE C-REFUELING G-OPERATIONAL ERROR (EXPLAIN) li kl f.ill A10HY lil'.lklrilHH 11 OllllP N Xi'l AlN)
2.7.1.2 Unit 2 2.7.1.2.1 Operating Experience On July 8, 1976 Unit 2 went critical and began Zero Power Physics Testing for the beginning of Cycle 2 which continued until July 10, 1976 when the Power Escalation Test began. Turbine control problems caused the unit to remain at 15 percent full power until July 12, 1976 when the power level was increased to 40 percent full power and testing was begun at that level. A power level decrease was begun the same day due to a leaking pressure tap from the turbine. At 35 percent full power a feedwater swing developed and the unit tripped. Repairs were made and the 40 percent testing plateau was reached on July 13, 1976. Testing at this . plateau was completed on July 15, 1976 and the 75 percent full power testing plateau was reached the same day. During the testing at the 75 percent full power level, the Power Imbalance Detector Correlation Test was repeated due to Testing inaccurate calibration of the NI6 bian amplifier during the first test. at the 75 percent full power level was concluded on July 17, 1976 and power in-crease to the 90 percent full power level was begun. Af ter the xenon equilibrium hold on July 18, 1976, pow r was increased and reached 100 percent full power on July 19, 1976. Testing at the 100 percent full power level was completed successfully on July 21, 1976. On July 26, 1976, power was decreased to 70 percent full power due to a low oil level in the upper oil pot of reactor coolant pump "2A1." Power was held at 70 percent full power until July 27, 1976 when the reactor was shutdown to repair the oil leak on reactor coolant pump "2Al" and a ruptured quench tank disc. The unit remained shutdown for the remainder of the month. 2.7.1.2.2 Changes, Tests and Experiments not requiring prior NRC approval. The following changes, tests and experiments were carried out without prior NRC approval pursuant to 10CFR50.59 during July,1976.
- 1. Revision 4 of station modification ON-172 was completed. The nodification involved the removal of boronmeters on Oconee Units 2 snd 3. The boron-meters were originally installed to cut down on the need for lab sampling during boron concentration changes but the boronmeters were found to be unreliable and were removed.
- 2. Revision 4 of station modification ON-284 was completed. The modification installed additional ventilation equipment to reduce the temperature in the curbine building.
- 3. Revisions 0, 1, 2, 3 and 4 of station modification ON-502 were completed.
The modification involved the replacement of the pressurizer relief isolation valve with a more reliable Westinghouse valve.
- 4. Revisions 0, 11, 12, 13 and 15 of station modification ON-507 were completed.
The modificaton involved changes in the low pressure injection system to prevent undesired boron concentrations af ter a postulated loss of coolant accident. 2.7-5
2 3
- 5. Revisions 0,1 and 2 of station modification ON-519 were completed. The modification provided the borated water storage tank level transmitters with independent heat tracing circuits to provide redundant heat tracing circuits which will prevent these lines from freezing during cold weather.
- 6. Revision 0 of station modification ON-546 was completed. The modification replaced the pressurizer root valves with more reliable Kerotest valves.
- 7. Revisions 0,1, 2, 5 and 6 of station modification ON-547 were completed.
The modification deleted the reactor coolant pump seal leakage standpipe and associated transmitters and added a new flow measuring device.
- 8. Revision 0 of station modification ON-551 was completed. The modification replaced the two stage seals in the lower reactor coolant pump seal cavities '
with a more reliable three stage seal packages.
'9. Revision 0 of station modification ON-586 was completed. The modification reconnected the directional ground relays to initiate automatic teclosing on the Jocassee breakers. The change was made to correct a design discrepancy.
- 10. Revision 0 of station modification ON-604 was completed. The modification involved the installation of a mounting pad on the bottom of the incore tank for a moveable incore detector drive.
- 11. Revision 0 of station modification ON-633 was completed. The modification involved the addition of gravel to the base of the protected area fence.
- 12. Revision 0 of station modification ON-637 was completed. The modification added a temporary off-line radiation monitor in parallel with radiation monitors RIA 33 and 34. The off-line monitor values will be correlated with the on-line monitors and laboratory samples.
2.7.1.2.3 Maintenance The following safety related maintenance was performed during July,1976. This section excludes major safety related corrective maintenance reported in 2.7.1.2.4. One Con'ensate Storage System valve, one HPI valve, one LPI valve, one Main Steam valve and one Reactor Coolant. System valve was repaired by replacing the packing in the valves. One reactor building cooling unit fan motor controller i was repaired by cleaning contacts that control the fan speed. One Reactor Building Purge valve would not seal properly and had to be repaired by replacing ! the valve stem and diaphragm. I 1 l
. 2.7-6
50 - 270 DOCKET NO. UNIT NAME oconee Unit 2 DUTAGES OR FORCED REDUCTIONS IN POWER 2.7.1.2.4 REPORT HONTH n , n. inn (Over 20 Percent of Design Power Level and Longer Than Four Hours) SYSTEM CORRECTIVE SAFETY-RELATED OR ACTIONS MAINTENANCE CAUSE REPCRTABLE COMPONENT DURATION (HOURS) REASON OCCURRENCE DATE AFFECTED NUMBER _ Continuation of refueling outage. 265.15 C 7/1/76 r Repairs were made to the high pressure Reactor tripped froin approximately 9.05 B turbine pressure tap. 7/12/76 35 percent full power due to a feed-water swing. The unit was being shut-down at the time for high pressure turbine pressure tap leak repair. Corrective z.ction taken during next outage, 37.84 A 7/26/76 Power level was r.luced from 100 percent full power to approximately 70 percent full power due to low oil level in the upper oil pot of reactor coolant pump "2A1.". 011 added to reactor coolant pump "2Al." Reactor shutdown from 70 percent full 15.68 B 7/27/76 power to repair oil leak on reacter coolant pump "2A1." Quench tank disc replaced. In addition, the Remained shutdown from previous out- 84.00 B root valves on the pressurizer were inspected 7/28/76 age to replace ruptured quench tank for possible damage caused by the disc disc. I on the quench tank being ruptured. No problems were found. During the outage one diaphragm valve was repaired by replacing the valve Summary: There was no singic release of radioactivity diaphragm. Also, the control rod drive breaker or unusual radiation exposure specifically in the electrical power supply system was associateri with any outage which accounted fo : replaced due to a breaker that would not close more than 10 percent of the allowable annual
.N l properly.
y values. E-OPERATOR TRAINING AND LICENSE EXAMINAll0N
'
u A-EQUIPMENT FAILURE (EXPLAIN) F-ADMINISTRATIVE B-MAINTENANCE OR TESTING G-OPERATIONAL ERROR (EXPLAIN) C-REFUELING 1101111H llXi'l AIN) h HiI HI AlHity Hl'ilklf 11011 . - - _ . _ - - _ _ . _ _ _ _ _ . _ _ _ _ _ _ _ _ - _ _ _ -
2.7.1.3 Unit 3 2.7.1.3.1 Operating Experience The unit began the month at 98 percent full power. On July 1,1976 the turbine tripped due to low shaft pressure. The reactor was shutdown and remained down for an inspection of the Reactor Coolant System hydraulic suppressors until July 9,1976 when power was increased to 60 percent full power. On July 10, 1976 power was increased to 80 percent full power to await xenon equilibrium. The unit decreased power to 15 percent full power on July 11, 1976 due to a generator field ground, and was returned to 80 percent full power for xenon hol? on July 12, 1976. Power was increased to 97 percent full power on July 13, 1976, and remained at this power level until July 21, 1976 when the unit was brought down
,
due to steam generatcr tube leaks. The unit remained down until July 31, 1976 when power was increased to 60 percent full power. 2.7.1.3.2 Changes, Tests and Experiments not requiring prior NRC approval. The following changes, tear = and experiments were carried out without prior NRC approval pursuant to 10t .59 during July,1976.
- 1. Revision 1 of station modification ON-73 was completed. The modification involved the installation of low yield blast doors at the access areas to the control room for protection against pipe whip in the event of high energy pipe breaks.
- 2. Revision 4 of station modification ON-172. The modification involved the re-moval of the boronmeters on Oconee Units 2 and 3. The bcronmeters were originally installed to cut down on the need for lab sampling during boron concentration changes but the boronmeters were found to be unreliable and were removed.
- 3. Revision 4 of station modification ON-284 was completed. The modification installed additional ventilation equipment to reduce the temperature in the Turbine Building.
- 4. Revision 0 of station modification ON-303 was completed. The modification involved the addition of weight to the inner basket of the east and west fuel transfer baskets to shif t the center of gravity so the basket will not be top heavy.
- 5. Revision 1 of station mcdification ON-379 was completed. The modification e
' added radial retainer clips on the thrust runner air seal in the reac tor coolant pump motor oil system to prevent the fretting of the seal ring and the loss of oil from the upper oil pot.
- 6. Revisions 0, 2 and 3 and Part 3A of station modification ON-401 were completed. The modification involved the installation of new spent fuel storage racks which increased the storage capacity of the Unit 3 spent fuel pool from 216 assemblies to 480 assemblies. All questions of nuclear safety were evaluated and prior NRC approval was granted.
2.7-8
-
. _ _ _ _ . __ _ . _ _ - _ _ _ _ _ _ _ _ _ _ _ _
- 7. Revision 0 of station modification ON-517 was completed. The modification replaced the existing Cutler Hammer switch operators with new serf as A-3 operators. This change will provide more reliable switch operation.
- 8. Revisions 0, 1, and 2 of station modification ON-519 were completed. The modification provided the borated water storage tank level transmitters tracing circuits with independent heat tracing circuits to provide redundant heat which will prevent these lines from freezing during cold weather.
- 9. Revision 0 of station modification ON-576 was completed. The modification involved installation of backup plates to stiffen the oil pans on the reactor coolant pump motor lower oil pots. The plates will reduce oil leakage from ,
the pot. .
- 10. Revision 0 of station modification ON-586 was completed. The modification reconnected the directional ground relays to initiate automatic reclosing on the Jocassee breakers. The change was made to correct a design discrepancy.
- 11. Revisions 0 and 1 of station modification ON-628 were completed. The modification involved the replacement of drain piping on the "3Bl" and "3B2" moisture separator reheaters with heavier schedule piping and added a valve to each ene and one-half inch line.
- 12. Revision 0 of station modification ON-631 was completed. The modification involved the connection of the instrument air supply system to the powdex air wash supply. This change will supply supplemental air to the powdex system.
- 13. Revision 0 of station modification ON-633 was completed. The modification added gravel to the base of the protected area fence.
- 14. Revision 0 of station modification ON-637 was completed. The modification added a temporary off-line radiation monitor in parallel with radiation anitors RlA 33 and 34. The of f-line monitor will monitor total liquid effluent released f rom the station and these values will be correlated with the on-line monitors and laboratory samples.
1%. Revision 0 of station modification ON-638 was completed. The modification relocated a pipe restraint guide for the pressurizer piping to clear a damaged area in the concrete wall. 2.7.1.3.3 Maintenance The following safety related maintenance was performed during July,1976. This section excludes major safety related corrective maintenance reported in 2.7.1.3.4. The "3A" concentrated boric acid storage tank pump was repaired by replacing an O' ring that had failed allowing water leakage. 2.7-9 .
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DOCKET NO. 50 - 287 OUTAGES OR FORCED REDUCTIONS IN POWER UNIT NAME Oconee Unit 3 2.7.1.3.4 (Over 20 Percent of Design Power Level and Longer Than Four Hours) REPORT HONTH July, 1976 SYSTEM CAUSE OR CORRECTIVE SAFETY-RELATED COMPONENT DURATION REPORTABLE ACTIONS MAlHTENANCE DATE AFFECTED (HOURS) REASON OCCURRENCE NUMBER 7/1/76 Reactor shutdown due to spurious 3.10 11 The lubrication oil pressure on the turbine turbine trip. was corrected. 7/1/76 "aactor remained shutdown from 183.35 D One hydraulic suppressor was repaired. previous outage while the reactor coolant system hydraulic suppressors were inspected. 7/11/76 The unit decreased power from 80 4.10 11 The circumstances causing the ground were percent to 15 percent full power due corrected. to a generator field ground. 7/21/76 Unit was shutdown from 97 percent full 238.76 A RO 287/76-10 The leaking tube and two other questionable power due to steam generator tube tubes were plugged. One valve was repacked leaks. In the RC System. Also, one of the detectors in the Nuclear Instrumentation System was repaired by replacing a shorted lead. Summary: There was no single release of radioactivity y or unusual radiation exposure specifically
- y asso lated with any outage which accounted fo r more than 10 percent of the allowable annual 4o values.
A-EQUIPMENT FAILURE (EXPLAIN) E-uPERATOR TRAINING AND LICENSE EXAMINATION 8-MAINTENANCE OR TESTING F-ADMINISTRATIVE C-REFUELING G-OPERATIONAL ERROR (EXPLAIN) n i.o niaiony m inirlinN N oiinn (ixil AlN)
,
. .
, 2.8 REPORT TC~E AUGUST, 1976
.
S e 2.8-1
i 2.8.1 OPERATIONS
SUMMARY
2.8.1.1 Unit 1 2.8.1.1.1 Operating Experience Unit 1 began the month at 100 percent full power and remained at this power level until August 9,1976 when power was decreased to 74 percent full power due to the low oil level in the lower oil pot of reactor coolant pump "lA1." On August 14, 1976 the reactor tripped on high pressure due to a feedwater swing resulting from the drop of Group 6 control rods. The unit was returned to 100 percent full power on August 17, 1976 and remained at that power level until August 29, 1976 when power was reduced to 40 percent full power to replace a turbine oil ~ cooler. Power was increased to 100 percent full power on the same day. The unit continued at 100 percent full power operation until August 31, 1976 when the reactor tripped due to the drop of Group 5 control rods during a performance test. 2 . 8.1.1. 2 Changes, Tests and Experiments not requiring prior NRC approval. The following changes, tests and experiments were carried out without prior NRC approval pursuant to 10CFR50.59 during August, 1976.
- 1. Revision 0 of staticn modification ON-10 was completed. The modification involved the installation of a key-operated bypass switch to allow operation of the fuel transfer carriage drive mechanism from outside the Reactor Building. The bypass switch will eliminate the need for personnel to enter the Reactor Building for fuel transfer carriage testing.
- 2. Revision 14 of station modification ON-203 was completed. The modification involves the installation of a new system for processing laundry and hot
,
'
shower radioactive wastewater.
- 3. Revisions 0, 1, and 2 of station modification ON-253 were completed. The modification provided an improved plant security system.
.
- 4. Revision 1 of station modification ON-394 was completed. The modification involvedcounting Physics the installation room. of an air conditioner and air lock in the Health
!
- 5. Revision 0 of station modification ON-506 was completed. The modification changed the Electro-Hydraulic Control - Integrated Control System contact for the tur'oine control valve indication from normally closed to normally open.
The change will correct the indication and provide for proper operation of the Integrated Control System.
- 6. Revision 0 of station modification ON-540 was completed. The modification involved the installation of a Hankicon Trip-L-Trap in the blowdown line off the air receiver of the air compression system. The Trip-L-Trap will re-move moisture from the air receiver.
- 7. Revision 0 of station modification ON-555 was completed. The modification involved the installation of an instrument line and gauge connection on the moisture separator reheater drain pumpe and heater drain pumps.
2.8-2
L The modification
- 8. Revision 0 of station modification ON-578 was completed.
deleted the RIA 4X and 3RIA 4X relays from the circuitry on the spent fuel The change removes the automatic shutdown by high pool ventilation system. radiation signal which would cause vented air to bypass the filte The modification
- 9. Revision 0 of station modification ON-599 was completed. to allow changes the input pin to the backup incore detector system chart proper backup detection to be utilized for flux tilt calculations.
2.8.1.1.3 Maintenance . 1976. The following safety related maintenance was performed during August, - This section excludes major safety related corrective maintenance reported in 2.8.1.1.4. An The core flood tank level instrumentation indicated an erratic reading. amplifier was replaced in the system correcting the problem. 4 s ' 2.8-3
. _ - -. _. - _. .. . _ - - . -- .-. - - - - - - -
DOCKET NO. 50 - 269 2.8.1.1.4 OUTAGES OR FORCED REDUCTIONS IN POWER UNIT NAME oconee Unit 1 (Over 20 Percent of Design Power Level and Longer Than Four Hours) REPORT HONTH Annust. 1976 SYSTEM
.CAUSE- 03 CORRECTIVE SAFETY-RELATED COMPONENT DURATION REPORTABLE ACTIONS MAINTENANCE DATE AFFECTED (HOURS) REASON OCCURRENCE NUMBER 8/9/76 Power was reduced to 74 percent full 112.79 A During next outage oil was added to the reactor power from 100 percent due to a low coolant pump oil pot.
oil level in the lower oil pot of reactor coolant pump "lA1." 8/14/76- Reactor tripped from 74 percent full '32.41 A Investigation revealed that the problem resulted power on high pressure due to a , _r d- from heat and moisture from an open door to the water swing resulting from the drop penetration room. The door was closed and all of group 6 control rods. personnel were advised to observed door markings. 8/31/76 Reactor tripped from 100 percent due 1.94 A Control rod assemblias group 5 and 8 were to the drop of group 5 control rods swapped. during a performance test due to a control rod drive power supply malfunction. Summary: There was no single release of radioactivity or unusual radiation exposure specifically associated with any outage which accounted for
, more than 10 percent of the allowable annual g values.
l A-EQulPMENT FAILURE (EXPLAIN) E-OPERAT6T~ TRAINING AND LICENSE EXAMINATION B-MAINTENANCE OR TESTING F-ADMINISTRATIVE C-REFUELING G-OPERATIONAL ERROR (EXf'L AIN) H "Illi H ll yPl(lli) 11 l'l # lit e ino V I'l
- IP lt I inh
.
2.8.1.2 Unit 2 2.8.1.2.1 Operating Experience Repairs on the quench cank were completed on August 2,1976 and reactor heatup commenced. Control Rod 7 in Group 5 dropped due to a blown fuse and the reactor was shutdown. Repairs, which included replacing the fuses and a stator assembly, were completed on August 3,1976. During heatup an oil leak was found on a steam line snubber. The snubber was repaired. Also, control rod breakers 3, 4 and 11 failed to close due to a blown fuse. The fuse was replaced and heatup con-tinued. Reactor startup was commenced but the reactor was shutdown from approximately 10 percent full power due to an inoperable control rod position indication tube on rod 4 group 6. . After the position indication tube was repaired, reactor startup was again initiated. At approximately 10 percent full power the turbine tripped due to turbine thrust bearing wear. Repairs were made and power was increased to 70 percent full power on August 5,1976. The power level was held Power at 70 was percent then full power for a fuel heat soak for approximately nine hours. increased to 100 percent full power. On August 27, 1976 power was decreased to 65 percent full power to analyze noise in the "2A" once-through steam generator (OTSG). After five hours power was increased to 87 percent full power but the noise level increased and the reactor was shutdown on August 28, 1976. The noise was determined to origi-nate from a loose handwheel on the "2A" OTSC level transmitter root valve. The handwheel was repaired. During the ou: age, repairs were made to the "2A" feedwater pump casing vent and a "2D2" flash tank pipe union. Power was increased the same day to 80 percent full power and held for five hours as prescribed by a B6W manevering recommendation dated December 25, 1975. Power was increased to 100 percent power on August 30, 1976 and remained at this level for the duration of the month. 2.8.1.2.2 Changes, Tests and Experiments not requiring prior NRC approval. ' The following changes, tests and experiments were carried out without prior NRC approval pursuant to 10CER50.59 during August, 1976.
- 1. Revision 14 of station modification ON-203 was completed. The modification involves the installation of a new system for processing laundry and hot shower radioactive waste water.
- 2. Revisions 0, 1, and 2 of station modifiction ON-253 were completed. The modification provided an improved plant security system.
- 3. Revision 1 of station modification ON-394 was completed. The modification involved the installation of an air conditioner and air lock in the Health Physics counting room.
- 4. Part 4 of Revision 0 of station modification ON 493 was completed. The modification revised and strengthened safety related hangers.
2.8-5
- 5. Revisions 0, 3 and 4 of station modification ON-547 were completed. The modification deleted the reactor coolant pump seal leakage standpipe and associated transmitters and installed a new flow measuring device.
- 6. Revision 2 of station modification ON-551 was completed. The modification replaced the two stage seal in the lower reactor coolant pump seal cavity with a more reliable three stage seal package.
- 7. Revision 0 of station modification ON-555 was completed. The modification involved the installation of an instrument line and gauge connection on the moisture separator reheater drain pumps and heater drain pumps.
- 8. Revision 0 of station modification ON-578 was completed. The modification deleted the RIA 4X and 3RIA 4X relays from the circuitry on the spent fuel '
pool ventilation system. The change removes the automatic shutdown by high radiation signal which would cause vented air to bypass the filters.
- 9. Revison 0 of station modification ON-599 was compler.ed. The modification changes the input pin to the backup incore detector system chart to allow proper backup detection to be utilized for flux tilt calculations.
- 10. Revision 0 of station modification ON-602 was completed. The bridge trolley / bridge limit switches were modified to allow mast access to rows of new high density fuel storage racks.
2.8.1.2.3 Maintenance The following safety related maintenance was performed during August, 1976. This section excludes major safety related corrective maintenance reported in 2.8.1.2.4. One valve packing the LPI System was adjusted and the packing was replaced in another valve, in the LPI System due to stem leakage.. The concentrated boric acid storage tank pump was repaired by replacing the coupling on the drive shaft. 2.8-6
_ - DOCKET NO. 50 - 270 ui;*T NAME Oconee Unit 2 OUTAGES OR FORCED REDUCTIONS IN POWER 2.8.1.2.4 August, 1976 REPORT MONTH (Over 20 Percent of Design Power Level and Longer Than Four Hours) i SYSTEM CORRECTIVE SAFETY-RELATED CAUSE OR ACTIONS MAINTENANCE DURATION REPORTABLE COMPONENT (HOURS) REASON OCCURRENCE DATE AFFECTED NUMBER
,
See corrective action for July, 1976. Also, " Continuation of previous outage. 90.29 B fuses and a stator assembly for group 5 control 8/1/76 rods were replaced. A hydraulic snubbor was repaired and fuses in control rod breakers 3, 4 and 11 were replaced. Noise became faint so unit was taken up in 22.90 F 8/27/76 Power was reduced from 100 percent to power. Eventually the noise lead to the 65 percent f ull power to analyze following outage, noise in the "2A" once through steam generator. Noise originated from a loose handwheel on Unit was shutdown to investigate 12.19 F 8/28/76 the "2A" OTSG 1evel transmitter root valve. noise in the "2A" steam generator Repairs were made to the handwheel, a "2A" feedwater pump casing vent and a "2D2" flask tank pipe union. Sunnary: There was no single release of radioactivity or unusual radiation exposure specifically , associated with any outage which accounted fo -
.N more than 10 percent of the allowable annual i values.
w E-OPERATOR TRAINING AND LICENSE EXAMINATION A-EQUIPMENT FAILURE (EXPLAIN) F-ADHlNISTRATIVE 8-MAINTENANCE OR TESTING C-REFUELING G-OPERATIONAL ERROR (EXPLAIN) e- ... . ..e m i eusv p s e t u t t' l l ori ll IllitLit fl yl'l e l H) _- _ _ . _ _ .
-- -
r 2.8.1.3 Unit 3 2.8.1.3.1 Operating Experience
!
The unit began the month at 60 percent full power recovering from a previous
) . outage for steam generator tube repair. On August 1, 1976 the power was in- >
creased to 80 percent full power for xenon hold. Reactor power was then in-creased to 100 percent full power on August 2, 1976. On August 8, 1976 reactor power was reduced to 50 percent full power to install an amplifier in "B" channel flow. Power was then increased to 80 percent full power for xenon hold and then to 100 percent full power. The unit remained at this level until August 17, 1976 when power was reduced to 60 percent full power due to a condenser tube leak. Repairs were made and the unit was brought to 80 per-k cent full power for xenon hold. Reactor power was increased to 100 percent
- j full power on August 19, 1976 and remained at this power level for the re-
, mainder of the month. . 2.8.1.3.2 Changes, Tests, and Experiments not requiring prior NRC approval.
' The following changes, tests and experiments were carried out without prior NRC approval pursuant to 10CFR50.59 during August, 1976.
- 1. Revision 14 of station modification ON-203 was completed. The modification involves the installation of a new system for processing laundry and hot shower radioactive wastewater.
>
- 2. Revisions 0,1, and 2 of station modification ON-253 were completed. The modification provided an improved plant security system.
- 3. Revision 1 of station modification ON-394 was completed. The modification involved the installation of an air conditioner and air lock in the Health Physics counting room.
4. Part 5 of Revision 0 of station modification ON-401 was ccmoleted. The ! modification involved the installation of new spent fuel storage racks which ! increased the storage capacity of the Unit 3 spent fuel pool from 216 l assemblies to 480 assemblies.
!
- 5. Revision 0 of station modification ON-555 was completed. The modification 4
involved the installation of an instrument line and guage connection on the j moisture separator reheater drain pumps and heater drain pumps.
- 6. Revision O. of station modification ON-599 was completed. The modification
;
changes the input pin to the backup incore detector system chart to_ allow proper backup detection to be utilized for flux tilt calculations. , 7. Revisions 0,1 and 2 of station modification ON-600 were completed. The
)
modification relocated several valves associated with the spent resin storage ' tank. The valves were in a high radiation area which limited assessibility for operation.
- 8. . Revision 0 of station modification ON-642 was completed. The modification added a funnel with an isolation valve to che blank flanged chemical addition line to the interim radwaste evaporator.
.
2.8-8 l l r ! !
- , - ~ - , - , . , . . , . - - - - , , - , .- - - n. ., w
- - -- - - _ _ -
.
. 2.8.1.3.3 Maintenance The following safety related maintenance was performed during August, 1976. This section excludes major safety related corrective maintenance reported in 2.8.1.3.4. ! 4 One RC System valve would not operate due to a broken yoke. The yoke was replaced. One RB cooling unit fan would not operate due to the failure of a wire in the control circuit. The wire was replaced and the cooling unit operated properly.
.
f 2.8-9 1
DOCKET NO. 50 - 287 2.8.1.3.4 OUTAGES OR FORCED REDUCTIONS IN POWER UNIT NAME Oconee Unit 3 (Over 20 Percent of Design Power Level and Longer Than Four Hours) REPORT HONTH Aucust. 1976 SYSTEH CAUSE OR CORRECTIVE SAFETY-RELATED COMPONENT DURATION REPORTABLE ACTIONS MAINTENANCE DATE AFFECTED (110URS) REASON OCCURRENCE NUMBER 8/17/76 Power was reduced from 100 percent to 20.84 A Condenser tube was plugged. 60 percent full power due to a condenser tube leak. Summary: There was no single release of radioactivity or unusual radiation exposure specifically
,N associated with any outage which accounted fo r y more than 10 percent of the allowabic annual g values. I A-EQUIPHENT FAILURE (EXPLAIN) E-OPERATOR TRAINING AND LICENSE EXAMINATION 8-HAINTENANCE OR TESTING F-ADMINISTRATIVE C-REFUELING G-OPERATIONAL ERROR (EXPLAIN) 0-REGULATORY RESTRICTION 6-0THER (EXPLAIN)
.
_ . _ - _ . - _ . . . _ _ . . . . _ _ _ _ _. .___
.
2.9 REPORT FOR SEPTEMBER, 1976
.
.
l 1 l 2.9-1
2.9.1 OPERATIONS
SUMMARY
2.9.1.1 Unit 1 2.9.1.1.1 Operating Experience On September 1, 1976 the unit began power increase and recched 100 percent full power on September 2, 1976. On September 4, 1976 the unit was shutdown for a control rod repatch. Power increase began on September 5, 1976 and 100 percent full power was reached on September 7, 1976. Power was decreased to 75 percent full power on September 9,1976 for a turbine trip test and on September 10, 1976 power was returned to 100 percent full power. On September 26, 1976 power was reduced to 93 percent full power for three hours due to system load demand. Power was returned to 100 percent full power and remained at the level for the - remainder of the month. 2.9.1.1.2 Changes, Tests and Experiments not requiring prior NRC approval. The following changes, tests and experiments were carried out vithout prior NRC approval pursuant to 10CFR50.59 during September,1976.
- 1. Revision 3 of station modification ON-253 was completed. The modification provided an improved plant security system.
- 2. Revision 3 of station modification ON-394 was completed. The modification involved the installation of ar. air conditioner and air lock in the Health Physics counting room.
- 3. Revision 0 of station scdification ON-400 was completed. The modification involved the installation of six booster fans in the chemistry and health physics labs.
- 4. Revisions 1, 2 and 3 of station modification ON-421 were completed. The modification involved the installation of a cooling system for the generator Alterex excitor.
- 5. Revisions 0, 1, 2 and 3 of station modification ON-440 were completed. The modification involved the installation of an air conditioner for the emergency batteries.
- 6. Revision 0 of station modification ON-510 was completed. The change will modify the fire detection system to initiate the statalarm in the control room each time a fire detector goes to the alarm state.
- 7. Revision 0 of station modification ON-550 was completed. The modification adds three hundred permanent and two hundred temporary parking spaces for station parking. '
- 8. Revision 0 of station modification ON-584 was completed. The modification involved moving the refueling phone jack from Oconee Unit 1 control board to the Keowee control board for' easier access.
. 2.9.2
- 9. Revision 0 of station modification ON-634 was completed. The modification involved the installation of fuses in line with limit switches to protect the ES power source f rom power disturbances.
- 10. Revision 0 of station modification ON-647 was completed. The modification involved the installation of a new design of Grinnell figure 200 shock and sway suppressors to replace the old design.
- 11. kevisions 0 and 1 and Part 1 of station modification ON-674 were completed.
The modification involved the installation of a power supply to the new PBX telephone system and microwave f eeder. This change will assure a non-inter-ruptible power supply. . 2.9.1.1.3 Maintenance The following safety related maintenance was performed during September, 1976. This section excludes major safety related corrective maintenance reported in 2.9.1.1.4. During the month three valves were repaired as follows: (1) a leaking gasket was replaced on the hinge pin on one valve on the Feedwater System, (2) a diaphragm was replaced. in a coolant storage valve that was leaking past the seat, (3) one feedwater valve packing leak was repaired by ad-justing the packing. K 2.9-3 <
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _. _. . . _ _ DOCKET NO. 50 - 269 2.9.1.1.4 OUTAGES OR FORCED REDUCTIONS IN POWER UNIT NAME Oconee Unit 1 (Over 20 Percent of Design Power Level and Longer Than Four Hours) REPORT HONTH September, 1976 SYSTEM CAUSE OR CORRECTIVE SAFETY-RELATED COMPONENT DURATION REPORTABLE ACTIONS MAINTENANCE DATE AFFECTED (HOURS) REASON OCCURRENCE NUMBER
'9/1/76 Continutation of previous outage. 5.06 B See corrective action in August, 1976.
9/4/76 Unit was shutdown from 100 percent 26.40 11 Control rod was repatched. full power for control rod repatch. . Summary: There was no single release of radioactivity or unusual radiation exposure specifically associated with any outage which accounted f c> r more than 10 percent of the allowable annual
,N values, i.
A-EQUIPMENT FAILb?F. (E*PLAltt) E-Ol' ERA 10R 1 RAINING ATU LICENSE EXAMINAl10N B-MAINTENANCE OR TESTING F-ADillill 5T RAT IVE C-REFUELING G-UPERAT10taAL ERROR (EXPLAIN) __ . _ _ _ _ . _ _ _ _ - _ - _ _ _ _ _ - _ _ _ _ _ _ - _ _ _ _ _ _ _ _ _ _ _ _ _- ______
~ -- ~ ~ ~~ " c ~ m nn _
_ y-nm a arm a na
2.9.1.2 Unit 2 2.9.1.2.1 Operating Experience The unit operated at 100 percent full power until September 7,1976 when the reactor tripped on high reactor coolant system pressure due to a backup speed amplifier f ailure during a turbine trip test. During the outage the amplifier and inoperable Control Rod Drive breakers were repaired and NSM-ON-0468 which corrected diode voltage spikes in the turbine control mechanism was completed. Power was then increased to 80 percent full power and held at this point due to feedwater swings. Power was increased to 90 percent full power to await xenon equilibrium. The unit was returned to 100 ~ percent full power on September 9,1976 and remained at this level until September 18, 1976 when power was reduced to 65 percent full power to repair a piping f ailure on "2A" feedwater pump. Power was then increased to 90 percent full power to await xennon equilibrium on September 19, 1976 and was returned to 100 percent f ull power the same day. The unit was at 100 percent full power for the remainder of the month. 2.9.1.2.2 Changes, Tests and Experiments not requiring prior NRC approval. The following changes, tests and experiments were carried out without prior NRC approval pursuant to 10CFR50.59 during September,1976.
- 1. Revision 5 of station modification ON-172 was completed. The modification involved the removal of boronmeters on Oconee Units 2 and 3. The boron-meters were originally installed to cut down on the need for lab sampling during boron concentration changes but the boronmeters were found to be unreliable and were removed.
- 2. Revision 3 of station modification ON-253 was completed. The modification provided an improved plant security system.
- 3. Revision 2 of station modification ON-394 was completed. The modification involved the installation of an air conditioner and air lock in the Health Physics counting room.
- 4. Revision 0 of station modification ON-400 was completed. The modification involved the installation of six booster fans in the chemistry and health physics labs. .
- 5. Revision 1, 2 and 3 of station modification ON-421 were completed. The modification involved the installation of a power supply network and cooling water for the voltage regulator cabinets.
Revision 0, 1, 2 and 3 of station modification ON-440 were completed. The 6. modification involved the installation of an air conditioner for the emergency batteries.
- 7. Revision 0 of station modification ON-468 was completed. The modification involved the addition of diodes across the coils of relays in the Electro-Hydraulic Control system. The diodes will suppress signal spiking.
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- 2.9-5
8 Revision 0 of station modification ON-510 was completed. The change will modify the fire detection system to initiate the statalarm in the centrol room each time a fire detector goes to the alarm state.
- 9. Revisions 0,1and2ofstationmodificationON-519werec5$pleted. The modification provided the borated water storage tank level transmitter with an independent heat tracing circuit for the instrument impulse line.
- 10. Revision 0 of station modification ON-634 was completed. The modification involved the installation of fuses inline with limit switches to protect the ES power source from power disturbances.
- 11. Revisions 0 and 1 of Part 1 of station modification ON-674 were completed. .
The modification involved the installation of a power supply to the new PBX telephone system and microwave feeder. This change will assure a non-interruptible power supply.
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2.9.1.2.3 Maintenance The following safety related maintenance was performed during September,1976. This section excludes major safety related corrective maintenance reported in 2.9.1.2.4. No safety related maintenance was performed.
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I 2.9-6 1 l ' I
_ _ _ _ _ _ _ _ _ _ _ _ _ _ .._ _____ ___ DOCKET NO. 50 - 270 UNIT NAME Oconee Unit 2 OUTAGES OR FORCED REDUCTIONS IN POWER 2.9.1.2.4 REPORT HONTH September. 1976 (Over 20 Percent of Design Power Level and Longer Than Four Hours) SYSTEM CORRECTIVE SAFETY-RELATED CAUSE OR ACTIONS HAINTENANCE DURATION REPORTABLE COMPONENT (HOURS) REASON OCCURRENCE DATE AFFECTED NUMBER A Nuclear Station Modification was completed Unit tripped from 100 percent full 15.14 A which corrected the diode voltage spikes in 9/7/76 power due to a speed amplifier the turbine control mechanism. circuit failure during a scheduled turbine trip test. Power was held steady to eliminate the feed-Power held at 80 percent full power 4.08 H 9/8/76 water swings. due to feedwater swings. 10.98 A Piping failure was repaired. 9/18/76 rower was reduced from 100 percent to 65 percent full power due to piping failure on "2A" feedwater por
.
Summary: There was no single release of radioactivity or unusual radiation exposure specifically w associated with any outage which accounted for
- e more than 10 percent of the allowable annual 1, values.
I E-OPERATOR TRAININr. AND LICENSE EXAMINATION A-EQL IPMENT FAILURE (EXPLAIN) F-ADMINISTRATIVE 3-MAINTENANCE OR TESTING G-OPERATIONAL ERROR (EXPLAIN) C-REFUELING n verm aiony pisinicilon u artlin Oxl> LAIN) . _ - - _ _ _ _ _ _ _
2.9.1.3 Unit 3 2.9.1.3 Operating Experience The unit operated at 100 percent full power until September 10, 1976 when a power reduction to 50 percent full power to extend fuel cycle life was begun. During the reduction, a trip in the Reactor Protection System Channel B caused the unit to run back to 36 percent full power. The power level was returned to 50 percent full power on September 13, 1976. The unit remained ae this power level unt September 17, 1976 when the unit tripped during maintenance on the power / loan im-balance runback circuitry. Reactor power was then increased to 80 percent full power and held at this level until September 18, 1976 when the unit was shutdown for refueling.
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2.9.1.3.2 Changes, Tests and Experiments not requiring prior NRC approval. The following changes, rests and experiments were carried out withoue prior NRC approval pursuant to 10CFR50.59 during September,1976.
- 1. Revisions 0 and 1 of station modification ON-47 were completed. The modifi-cation involved the addition of a three-fourths inch drain valve connection between valve T0-11 and the tank on the bottom of the drain line.
- 2. Revision 5 of station modification ON-172 was completed. The modification involved the removal of boronmeters on Oconee Units 2 and 3. The boron-meters were originally installed to cut down on the need for lab sampling during boron concentration changes but the boronmeters were found to be unreliable and were removed.
- 3. Revision 3 of station modification CN-253 was completed. The modification provided an improved plant security system.
- 4. Revision 0 and 1 of station modification ON-164 were completed. The modification involved the installation of a solenoid valve in the suction supply lines of the oil purifier. The valve will be open when the purifier is running and will close on loss of power or stopping of the purifier.
- 5. Revisions 1 and 2 of station uodification ON-314 were completed. The modification installed space heaters and additional lighting in the Auxiliary Building truck bay extention.
- 6. Revision 1 of station modification ON-329 was completed. The modification added a 15 second time delay relay in the frame down-carriage movement l circuit of the fuel transfer system. The change will prevent movement of '
the carriage before the frame is all the way down.
- 7. Part 2 of revision 1 of station modification ON-379 was completed. The modification added radial retainer clips on the thrust runner air seal in the reactor coolant pump motor oil system to prevent fretting of the seal ring and the loss of oil from the upper oil pot.
- 8. Revision 2 of station modification ON-394 was completed. The modification
!
j involved the installation of an air conditioner and air lock in the Health Physics counting room. l i l 2.9-8 l 1 . 1
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1
- 9. Revisions 1, 2 and 3 of station modification ON-421 were completed. The modification involved the installation of a power supply network and cooling water for the voltage regulator cabinets.
The
- 10. Revisions 0,1, 2 and 3 of station modification ON-440 were completed.
modification involved the installation of an air conditioner for the emergency batteries.
- 11. Revisions 0 and 1 of station modification ON-443 were completed. The modifi-cation replaced the inboard reactor coolant pump seal supply filter isolation valves with more reliable Westinghouse valves. .
- 12. Revision 0 of station modification ON-456 was completed. The modification added a totalizing gas meter with isolation and bypass valves to the lines which supply hydrogen to the generator.
- 13. Revision 0 and 1 of station modification ON-500 were completed. The modifi-cation replaced the existing main fuel bridge control rod grapple with an improved model.
- 14. Revision 0 of station modification ON-510 was completed. The change will modify the fire detection systea to initiate the statalarm in the control room each time a fire detector goes to the alarm state.
- 15. Revision 0,1 and 2 of station modification ON-519 were completed. The modification provided the borated water storage tank level transmitter with an independent heat tracing circuit for the instrument impulse line.
- 16. Revison 3 of station modification ON-579 was completed. The modification replaced several Velan valves on steam generators "3A" and "3B" with more re-liable Kerotest valves. The Velan valves were beyond repair and no spare parts were available.
- 17. Revision 0 of station modification ON-583 was completed. The modification adds a low flow alarm to the interim waste building ventilation system's exhaust to radiation monitor RIA-53.
- 18. Revision 0 of station modification ON-612 was completed. The modification involved the installation of a "T" connection and one-fourth inch tubing to provide for a caustic iajection pump pressure gauge.
- 19. Revision 1 of station modification ON-631 was completed. The modification involved the connection of the instrument air supply system to the powdex air wash supply. This change will supply supplemental air to the powdex system.
- 20. Revisions 0 and 1 of Part 1 of station modification ON-674 were completed.
The modification involved the installation of a power supply to the new PBX telephone system and microwave f eeder. This change will assure a non-interruptible power supply. 2.9-9
i 2.9.1.3.3 Maintenance The following safety related maintenance was performed during September,1976. This section excludes major safety related corrective maintenance reported in 2.9.1.3.4. Three valves in the Spent Fuel Cooling System were repacked. One line in the Coolant Storage System clogged due to the solidification of boric acid. This line was unclogged. A flash leak developed on one of the concentrated boric acid storage tank pumps and was repaired by replacing the O' ring and the flange. One of the reactor coolant pump seal supply fil*.ers leaked slightly due to a failed O' ring. The O' ring was replaced.
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2.9-10 1
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DOCKET NO. 50 - 287 UNIT NAME Oconee Unit 3 2.9.1.3.4 OllT AGES OR FOPCED nEDUCTIONS IN POWER September, 1976 REPORT HONTH (Over 20 Percent of Design Power Level and Longer Than Four Hours) SYSTEH CORRECTIVE SAFETY-RELATED CAUSE OR ACTIONS HAINTENANCE DURATION REPORTABLE COMPONENT (HOURS) REASON OCCURRENCE DATE AFFECTED NUMBER Faulty socket in power / load imbalance test Reactor tripped from 50 percent full 2.95 B circuit was replaced. 9/17/76 power during maintenance on the Power / Load imbalance runback circuit. Unit shutdown from 80 percent full 294.51 C 9/18/76 power for refueling outage.
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Summary: There was no single release of radioactivity or unusual radiation exposure specifically associated with any outage which accounted for
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' more than 10 percent of the allowable annual y values. I "o E-OPERATOR TRAINING AND LICENSE EXAMINATION
.L A-EQUIPMENT FAILURE (EXPLAIN) F-ADMINISTRATIVE
~ 8-MAINTENMCE OR TESTING G-0PERATIONAL ERROR (EXPLAIN)
C-REFUCLING N-0THER (EXPLAIN) 0-REGULATORY RESTRICTION
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l l l 2.10 REPORT FOR OCTOBER, 1976 l l l i
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I s a e 2.30-1
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! 2.10 OPERATIONS
SUMMARY
2.10.1 Unit 1 2.10.1.1 Operating Experience
' The unit operated at 100 percent full power until October 9, 1976, when power was reduced to 46% full power because of hi lower bearing oil temperature of the 1A, IB and 1C hotwell pumps. On October 10, 1976, power was increased to 88 percent full power and held to await xenon equilibrium until October 11, 1976, when power was increased to 100 percent full power. The unit remained at 100 percent full power until October 27,19/6, when the unit tripped due to a dropped control rod group while performing a control rod test. Power was increased to 88 percent full power to await xenon equilibrium on the same day. - On October 28, 1976, power was increased to 100 percent full power. A power reduction began on October 31, 1976, due to tube leaks in the 1A steam gener-ator and the unit was shutdown for the duration of the month. 2.10.1.2 Changes, Tests and Experiments Not Requiring Prior NRC Approval The following changes, tests and experiments were carried out without prior NRC 1 approval pursuant to 10CFR50.59 during October,1976.
- 1. Revision 0 of station modification ON-254 was completed. The change modi-
, fied the pneumatic operator on all the 230 KV PCB's to reduce high stress in ! the latch assemblies and mountings due to pressure buildup in the pneumatic operator.
- 2. Revision 0 of station modification ON-643 was completed. The modification involved the addition of a resistor to the spare 4160v circuit breaker.
The modification will provide a spare 1200 amp breaker for use in safety
.
related circuits. l
- 3. Revisions 0 and 1 of station modification ON-653 was completed. This modification will allow verification of grounding and will ground spare
- wires and shields in the underground control and instrument cables between Oconee and Keowee.
- 4. Revisions 0 and 1 of Part 1 of station modification ON-674 were completed.
The modification involved the installation of a power supply to the new PBX telephone system and microwave feeder. The change will assure a non-interruptible power supply to the telephone system. 2.10.1.1.3 Maintenance The following safety related maintenance was performed during October,1976. This section excludes major safety related corrective maintenance reported in 2.10.1.1.4. No safety related maintenance was performed. i 4 1 2.10-2 f
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4 4 f _. . . . _ _ . . , .,...,y_ . , . , . - . _ . . , , . _ . , _ . _ , , - . _ , -
_ _ _ _ _ _ _ _ _ _ - - - _ _-_ _ __ _. _ _. . . __ DOCKET NO. 50 - 269 UNIT NAME Oconee Unit 1 2.10.1.1.4 OUTAGES OR FORCED REDUCTIONS IN POWER REPORT HONTH October, 1976 (Over 20 Percent of Design Power Level and Longer Than Four Hours) _
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[ SYSTEM CORRECTIVE SAFETY-RELATED CAUSE OR ACTIONS MAINTENANCE OURATION REPORTABLE COMPONENT (HOURS) REASON OCCURRENCE Dhll' AFFECTED NUMB'ER
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Contaminated oil was changed. Power reduced f rom 100 percent to 46 20.95 A 10/9/76 percent full power due to high lower bearing oil temperature in the 1A,1B and 1C hotwell pumps. 10.51 A A control rod drive fuse was replaced, 10/27/76 Unit tripped from 100 percent full power due to a dropped control rod group during a scheduled test. 15.92 A 10 269/76-17 The leaking tube and one other tube with 10/31/76 Unit was shutdown from 100 percent questionable eddy current signals were plugged. full power due to tube leaks on the Also during the outage tMrty-three valves
'1A~ steam generator. were repacked to prevent auditional leakage from the valves. Three valves were repaired by replacing the body to bonnet gaskets. One reactor building cooling unit fan motor bearing was replaced due to high vibrations in the motor.
Summary: There was no single release of radioactivity or unusual radiation exposure specifiully - associated with any outage which accounted fo more than 10 percent of the allowable annual values. w ~ E-OPERATOR TRAINING AND* LICENSE EXAMINATION A-EQUIPMENT FAILURE (EXPLAIN) F-ADMINISTRATIVE b B-HAlNTENANCE OR TESTING G-OPERATIONAL ERROR (EXPLAIN) C-REFUELING H-0THER (EXPLAIN) 0-REGULATORY RESTRICTION
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2.10.1.2 Unit 2 2.10.1.2.1 Operating Experience The unit operated at 100 percent full power until October 3, 1976, when power was reduced to 65 percent full power to repair a casing vent line flange on"2B" feedwater pump. Power level was returned to 100 percent full power on October 4, 1976. Due to Turbine Building basement flooding, power was reduced to 86 percent full power on October 9, 1976, to check out secondary side pumps. The uni-c was returned to 100 percent full power on October 11, 1976. On October 12, 1976, while performing a turbine trip test, the*2B*feedwater pump turbine tripped when the auxiliary lube oil pump was started. The Inte-
- gratei 'ntrol System reduced power to 64 percent full power and repair work was in ted. Power was further reduced to 55 percent full power due to an alarm and readout inhibit on the rod 6 group 6 position indication tube.
The alarm cleared whan group 6 was withdrawn to 75 percent. On October 13, 1976, it was discovered that due to a cracked insulator, a Reactor Building electrical penetration, WMV-1, had lost SF gas pressure. Power reduction began on October 15, 1976, as required by Technical Specifi-cations and was at 45 percent full power when WMV-1 was returned to service. On October 16, 1976, the unit was reduced to 20 percent full power to put
*2Bl* reactor coolant pump back in service. Due to a low oil level alarm which was received when*2Bl*RCP was started, a reactor shutdown was initiated to correct the problem. Repair work on the*2Bfeedwater pump which consisted of repair of the pumps inboard bearing oil supply line and on feedwater pump bearings was also completed. The unit was back on line on October 17, 1976, and reached 91 percent full power to await xenon equilibrium on October 18, 1976. The power level was increased to 100 percent full power the same day.
On October 21, 1976, power was reduced to 55 percent full power to replace an inoperable fuse on a group 2 control rod. The unit was returned to 100 percent full power on the same day and maintained this power level for the remainder of the month. 2.10.1.2.2 Changes, Tests and Experiments Not Requiring Prior NRC Approval The following changes, tests and experiments were carried out without prior NRC approval pursuant to 10CFR50.59 during October, 1976.
- 1. Revision 0 of station modification ON-254 was completed. The change modi-fled the pneumatic operator on all the 230 KV PCB's to reduce high stress in the latch assemblies and mountings due to pressure buildup in the pneumatic operstor.
- 2. Revision 0 of station modification ON-643 was completed. The modification involved the addition of a resistor to the spare 416v circuit breaker.
The modification will provide a spare 1200 amp breaker for use in safety related circuits. ' 2.10-4 .
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Revisions 0 and 1 of station modification ON-653 was completed. This 3. modification will allow verification of grounding and will ground spare wires and shields in the underground control and instrument cables between Oconee and Keowee.
- 4. Revisions 0 and 1 of Part 1 of station modification ON-674 were completed.
The modification involved the installation of a power supply to the new PBX telephone system and microwave feeder. The change will assure a non-interruptible power supply. 2.10.1.2.3 Maintenance
.
The following safety related maintenance was performed during October,1976. This section excludes major safety related corrective maintenance reported in 2.10.1.2.4. A valve on the Liquid Waste Disposal System was repaired by replacing the motor on the electric operator, and replacing the roll pin the diaphragm of the valve body. A valve on the Chemical Addition System was repaired i by replacing the diaphragm in the valve. , 2.10-5
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DOCKET NO. 50 - 270 2,10.1.2.4 OUTAGES OR FORCEO REDUCTIONS IN POWER UNIT NAME Oconee Unit 2 (Over 20 Percent of Design Power Level and Longer Than Four Hours) REPORT HONTH october. 1976
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SYSTEM CAUSE OR CORRECTIVE SAFETY-RELATED COMPONENT DURATION REPORTABLE ACTIONS MAINTENANCE
- 01. f t AFFECTED (HOURS) REASON OCCURRENCE NUMBER
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10/3/76 Power reduced from 100 percent to 65 9.94 A Casing vent line flange on 2B feedwater pump percent full power to repair a casing was repaired. vent line flange on the 2B feedwater pap-10/12/76 Power was reduced from 100 percent ta 88.26 A RO 270/76-13 64 percent full power due to a loss The oil supply line to the "2B" feedwater pump of oil to the bearings on the "2B" turbine was repaired. Withdrawal of the group 6 feedwater pump turbine. Power was control rods cleared the alarm on the control further reduced to 55 percent full rod readout inhibit. The electrical penetration was repaired, power due ta an alarm and readout inhibit on the rod 6 group 6 position Indication tube. On 10/15/76 power was reduced to 45 percent full power due to a cracked insulator on a RB electrical penetration.
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10/16/76 Unit was reduced from 53 percent to 10.03 B Oil was added to the 2B1 reactor coolant pump 20 percent full power to put 2B1 and the pump was placed back in service. Repair reactor coolant pump back in service, were made on the pumps inboard bearing oil Unit was then shutdown to add oil to supply line and on feedwater pump bearings, alsc the pump. 10/21/76 Power was reduced from 100 percent to 12.57 A The control rod fuse was replaced. F 55 percent full power to replace an g inoperable fuse on a group 2 control
& rod.
Summary: There was no single release of radioactivity -l or unusual radiation exposure specifically A-EQUIPMENT FAILURE (EXPLAIN) E-OFERATOR TRAINING AND LICCNSE EXAMINATION associated with any outage which accounted for B-MAINTENANCE OR TESTING F-ADMINISTRATIVE C-REFUELING G-0PERATIONAL ERROR (EXPLAIN) more than 10 percent of the allowable annual 0-REGULATORY RESTRICTION ti-0THER (EXPLAIN) values.
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1 a l 2.10.1.3 Unit 3 2.10.1.3.1 Operating Experience
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The unit was shutdown for refueling for the entire month of October. I 2.10.1.3.2 Changes, Test and Experiments not requiring prior NRC approval The following changes, tests and experiments were carried out without prior NRC approval pursuant to 10CFR50.59 during October,1976. 1 Revisions 0 and I of station modification ON-47 were completed. The modi-a 1. i fication involved the addition of a three-fdurths inch drain valve connection ' ' between the main turbine oil tank drain and the storage tank on the bottom of the drain line, a
Revisions 1 and 4 of station modification ON-68 were completed. The modi-
- 2. '
l fication consisted of adding a two-ton jib crane in the reactor building. The crane will expedite maintenance activities. Revision 1 of station modification ON-192 was completed. The modification 1 3. i replaced the speed reference board of the main turbine speed controller to put the turbine on hold at 800 RPM instead of 500 RPM during unit starting.
- 4. Revision 0 of station modification ON-254 was completed. The change modi-fled to pneumatic operator on all the 230 KV PCB's to reduce high stress' in the latch assemblies and mountings due to pressure build-up in the pneu-matic operator.
- 5. Revisions 2 and 3 of station modification OH-370 were completed. The modifi-cation deleted the auto-start on creep function on the reactor coolant pump A.C. oil lif t circuits and added a three minute time out on the DC lif t pumps. This change will facilitate the control and monitoring of the oil lif t pump operation.
- 6. Revision 0 of station modification ON-377 was completed. The modification
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involved the installation of pushbuttons on the heater panels to by-pass the emergency high interlock on the heater extractions. This change will
- allow safer operation of the heaters.
Revision 1 of Part 2 of station modification ON-379 was completed. The 7. modification added radial retainer clips on the thrust runner air seal in the reactor coolant pump motor oil system to prevent the fretting of the , seal ring and loss of oil from the upper oil pot. <
- 8. Revision 1 of station. modification ON-404 was completed. The modification l
relocated the thermocouple wells on the 3A1, 3A2, .and 3B2 moisture seperator The change will improve ' reheaters to a location closer to the reheater. the accuracy of the thermocouples by eliminating signal errors.
- 9. Revision 0 of station modification ON-413 was completed. . The changes modify the C and E feedwater heater drain controls to allow manual control for , system startup and to facilitate overall control of the heater drain system.
2.10-7
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- 10. Revision 0 and 1 of station modification ON-443 were completed. The modi-fication replaced the inboard reactor coclant pump seal supply filter iso-lation valves with more reliable Westinghouse 7alves.
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- 11. Revision 0 and 1 of station modification ON-468 were completed. The modi-fication involved the replacement of diodes in the Electro-Hydraulic Control System to prevent spiking when the relays are being tested.
- 12. Revision 0 and 1 of station modification ON-474 were completed. The modi-fication revised the master / slave arrangement of the intercept valves in the reheaters. The change will prevent excessive flow in the reheaters.
- 13. Revision 0 of station modification ON-498 was completed. The modification
- involved the installation of a new weldolet adjacent to the relief valve on the Electro-Hydraulic Control System (EHC) piping and moved the air bleed valve cr the EHC piping to reduce the vibration of the air bleed valve.
- 14. Revision 0 of station modification ON-503 was completed. The modification replaced the annubar flow elements on the A, B, D, and E extraction lines for feedwater heating with *mproved stronger elements.
- 15. Revisions 0,1, and 2 of station modification ON-504 were completed. The revisions involved the installation of additional orifices on the first stage reheat supply piping to the moisture separator reheaters to increase the sensitivity of the main steam relief header leak detection system.
- 16. Revisions 0 and 1 of station modification ON-511 were completed. The modi ~
fication involved the installation of a small access door to the oil sump to facilitate sampling.
- 17. Revision 0 of station modification ON-514 was completed. The modification involved the installation of low point drains on the feedwater pump turbine steam sealing exhaust lines.
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- 18. Revision 0 of station modification ON-528 was completed. The modification involved the replacement of the reactor coolant pump motor oil drain tank level alarms, which are also called capacitanau orobes, with J0-BELL switches to reduce sensitivity and false alarms.
- 19. Revisions 0 and 1 of Part 2 of system modification ON-530 were completed.
The revisions involved the installation of jib cranes above each reactor coolant pump cavity on the fourth level. The jib cranes will eliminate need to use the polar crana for reactor coolant pump maintenance.
- 20. Revision 0 of station modification ON-533 was completed. The radification involved the replacement of a section of the carbon steel generator hydrogen drain line with stainless steel pipe. This change will prevent an elec-trically induced fire in the case of a line rupture.
- 21. Revision 0 of station modification ON-553 was completed. The modification involved the replacement of the internal neutral main generator bushing current transformer by a shielded transformer.
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2.10-8
- 22. Revision 0 of station modification ON-569 was completed. The modification involved the replacement of the Electro-Hydraulic Control accumulator tanks with ASME code tanks.
- 23. Revision 3 of station modification ON-579 was completed. The modification replaced several Velan valves on ste.am generator 3A and 3B with more reliable Kerotest valves. The Velan valves were beyond repair and no spare parts were available.
The modifi-
- 24. Revision 0 and 1 of station modification ON-597 were completed.
cation involved the inetallation of voltmeter indicators in the Unit 3 Con-trol Room for the 3CA and 3CB control batteries. . Revision 0 of station modification ON-634 was completed. The modification
- 25. switches involved the installation of fuses in the circuits from the limit of letdown cooler isolation valves, HP-3 and HP-4, andThe quench tank change suction will pre-valve, CS-5 to the engineered safeguards cabinet 8.
- clude the possibility that the flooding of the limit switches on these valves would result in a loss of normal control power to ES cabinet 8.
Revision 0 of station modification ON-643 was completed. The modification
- 26. The
' involved the addition of a resistor to the spare 4160v circuit breaker. modification will provide a spare 1200 amp breaker for use in safety related circuits. Revision 0 and 1 of station modification ON-653 were completed. This modifi-27. cation will allow verification of grounding and will ground spare wires and shields in the underground control and instrument cables between Oconee and Keowee.
- 28. Revisions 0 and 1 of Part 1 of station modification ON-674 were completed.
The modification involved the installation of a power supply to the new PBX This change will assure a non-telephone system and microwave feeder. interruptible power supply.
- 29. Revision 0 of station modification ON-686 was completed. The modification replaced 3FDW-58 and 60,Velan valves,with more reliable Kerotesc valves.
The valves are located in the feedwater pump warming line. 2.10.1.3.3 Maintenance The following safety related maintenance was performed during October,1976. This section excludes major safety related corrective maintenance reported in 2.10.1.3.4. The refueling outage began September 18, 1976 and lasted until November The 13, 1976. During the outage the surveillance specimen holder tubes were removed. normal maintenance work associated with head removal and installation was per-fo rmed. Also, during the outage 38 valves were repacked on safety-related systems. Bonnet / gaskets were replaced on six valves that had leaks on safety related systems. The O' ring on one electrical penetration flange had to be replaced when it would not pass the acceptance test. Two Grinnell Saunders valves were repaired by replacing the valve diaphragms. One Icw pressure The injection pump motor was running with the oil temperature above normal. alignment was checked on the motor and corrected to eliminate the problem. 2.10-9
. During the refueling outage the personnel hatch door had to be repaired three separate times. Two of the times the gests had worked loose due to the f requent operation during the refueling outage. One time the interlocks would not release and allow the door to be opened. The inter-locks had to be readjusted. Several tube fitting leaks occurred on the concentrated boric acid storage tank pump and were repaired by placing teflon on the threads and fittings and reinstalling them. The bearings were replaced on the emergency feedwater pump when the bearings began to run above normal temperature during operation. The power actuated relief valve on the pressurizer was repaired by taking 'the valve off and - sending it to the manufacturer. The manufacturer repaired the cracked seat. A flange on one of the building pumps had a small leak and was repaired by replacing the flange and gasket. Three valves were leaking through the seat were repaired by either lapping the seats or replacing the disc in the valve. One pneumatic operated valve did not operate properly. It was repaired by replacing the solenoid in the air supply line.
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_ DOCKET NO. 50 - 287 UNIT NAME oconee Unit 3 2.10.1.3.4 OllTAGES OR FORCED REDUCTIONS IN POWER REPORT HONTH october, 1976 (Over 20 Peri:ent of Design Pwer Level and Longer Than Four Hours) SYSTEM CORRECTIVE SAFETY-RELATED CAUSE OR ACTIONS MAINTENANCE DURATION REPORTABLE COMPONENT (HOURS) REASON OCCURRENCE DATE AFFECTED NUMBER Continuation of refueling outage. 744.0 C 10/1/16 aummary: There was no single release of radicactivity or unusual radiat. ion exposure specifically associated with any outage which accounted for N more than 10 percent of the allowable annual
. l values.
5: A-EQUlPMENT FAILURE (EXPLAIN) E-OPERATOR TRAINihG AND LICENSE EXAMINATIO F-ADMINISTRATIVE [ 8-HAINTENANCE OR TESTihG G-OPERATIONAL ERROR (EXPLAIN) C-REFUELING H-0THER (EXPLAIN) D-REGULATORY RESTRICTION
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2.11 REPORT FOR NOVEMBER, 1976
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2.11.1 OPERATIONS
SUMMARY
2.11.1.1 Unit I f 2.11.1.1.1 Operating Experience Oconee Unit I was shutdown for repairs to the#1AIsteam generator, the*1A2'reector coolant pump and valve RC-4 until November 15, 1976 when the unit was placed back in service. The unit reached 100 percent f ull power on November 17, 1976. On November 18, 1976, the unit was taken out of service due to high vibration on a turbine generator bearing. The unit remained shutdown through the end of the month. 2.11.1.1.2 Changes, Tests and Experiments not requiring prior NRC approval.
- The following changes, tests and experiments were carried out without prior NRC
, approval pursuant to 10CFR50.59 during November,1976. '
- 1. Revisions 0 through 8 of station modification ON-140 were completed. The modification moved PCB #25 to position #28 and placed a new breaker in position #30. The change will improve the reliability of the auxiliary power circuits through transformers CT2 and CT3.
- 2. Revisions 0 and 1 of station modification ON-264 were completed. The modi-fication involved the installation of a solenoid valve in the suction supply lines of the oil purifier. The valve will be open when the purifier is run-ning and will close on loss of power or stopping of the purifier.
- 3. Revision 0 and 2 of station modification ON-442 were completed. The modi-fication involved the installation of an interlock on the Reactor Building purge which will prevent the operation of the mini-purge fans when the large purge fans are operation.
4 Revision 0 of station modification ON-469 was completed. The modification added lock cylinders and thumb turns to the cable room doors to allow these doors to be locked with a key from the outside.
- 5. Revision 0 of station modification ON-514 was completed. The modification involved the installation of low point drains on the fr.edwater pump turbine steam exhaust lines.
- 6. Revision 0 of station modification ON-598 was completed. The modification involved the installation of visual targets in the Type SBFU Westinghouse ;
breaker failure relays. The targets provide visual indication of breaker j failure relay operation. l
- 7. Revisions 1 and 2 of station modification ON-686 were completed. The modi-fication replaced valves 3FDW-58 and 60 with more reliable Kerotest valves.
The va.1ves are located in the feedwater pump warming line.
- 8. Revision 0 of station modification ON-693 was completed. The modification added a manual valving arrangement to the air piping on the condenser dis-charge valve operators. The manual valves will vent air from the opening side of the condenser discharge valve and supply air to the closing side
- to assure closure of the cylinder, j 2.11-2
._ _- .- - . - - - .
4 2.11.1.1.3- Maintenance The following' safety related maintenance was performed during November,1976. I This section excludes major safety related corrective maintenance reported in 2.11.1.1.4.
.
1
.
No safety related maintenance was performed. l 1 , i f
*
! I i 4 0 4 i 4 4 i 1 1 i
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2.11-3
-. . . _ _ _ , - . _ _ _ _ _ _. ._. - .,_ .- _. ._ ._ . . _ _
_ _. __ _ ___ _ DOCKET NO. 30 - 269 2.11.1.1.4 OUTAGES OR FORCED REOUCTIONS IN POWER UNIT NAME oconee Unit 1 (Over 20 Percent of Design Power Level and Longer Than Four Hours) REPORT MONTH nm. ,ms ,. ion SYSTEM CAUSE OR CORRECTIVE SAFETY-RELATED COMPONENT OURATION REPORTABLE ACTIONS MAINTENANCE DATE AFFECTED - (HOURS) REASON OCCURRENCE NUMBER 11/1/76 Continuation of previous outage. 352.35 A 11/18/76 The unit u a s'hutdown from 100 290.57 B Maintenance on the turbine generator alterex perces' f Al power due to high includes regrouting and, machining the alterex vibration on a turbine generator base plate replacing the bearings, and hearing. realignit.g the alterex. Summary: There was no single release of radioactivity or unusual radiation exposure specifically associated with any outage which accounted fo r g more than 10 percent of the allowable annual
- g values.
Y
^
l ' A-E40!PMENT FAILURE (E"' LAIN) E-OPERATOR TRAINING AND LICENSE EXAMINATION B-MAthTENANCE OR TESTie F-ADMINISTRATIVE C-REFUILING G-0PERATIONAL ERROR (EXPLAIN) n nion Alony susl>Irilou H niinin ilxPI Alli)
2.11.1.2 Unit 2 2.11.1.2.1 Operating Expr-ience Oconee Unit 2 operated at e untially 100 percent full power for the entire month of November. Changes 'ests and Experiments Not Requiring Pric- NRC 2.11.1.2.2 Appr. .; The following changes, tests and experiments were carried out without prior NRC approval pursuant to 10CFR50.59 during November,1976. The Revisions O through 8 of station modification ON-140 were completed.
,
1. modification moved PCB #25 to position #28 and placed a new breaker in position #30. The change will improve the reliability of the auxiliary power circuits through transformers CT2 and CT3.
- 2. Revision 0 of station modification ON-469 was completed. The modification added lock cylinders and thumb turns to the cable room doors to allow these doors to be locked with a key from the outside.
- 3. Revision 0 of station modification ON-484 was. completed. The modification -
involved the addition of permanent access ladders to the Turbine Building turbine aisle and heater bay cranes to provide a safe means of egress to the Turbine Building cranes.
- 4. Revision 13 of station modification ON-547 was completed. The modification deleted the reactor coolant pump seal leakage standpipe and associated transmitters and added a new flow measuring device.
- 5. Revision 0 of station modification ON-596 was completed. The interim radwaste gas decay tank isolation valves were modified to provide auto-matic termination of a gaseous waste release on a radiation alarm from RIA 37 or 38. This change will correct a design deficiency.
- 6. Revision 0 of station modification ON-598 was completed. The modification involved the installation of visual targets in the Type SBFU Westinghouse breaker failure relays. The targets provide visual indication of breaker failure relay operation.
- 7. Revision 0 of station modification ON-687 was completed. The modification replaced the vent line of f of the "2A" f eedwater pump with a new flange, nipple and Kerotest globe valve to eliminate vibrational weld fatigue.
- 8. Revision 0 of station modification ON-699 was completed. The modification replaced the drain line from the Decon Room glove box and Change Room l showers with a straight run of piping to eliminate a low point water trap.
2.11.1.2.3 Maintenance The following safety related maintenance v'? performed during November,1976. This section excludes major safety relatea corrective maintenance reported in 2.11.1.2.4. No' safety related maintenance was performed. 2.11-5
._. . . _ _ _ _ . _ _ _ _ _ .
.
DOCKET NO. 50 - 270 2.11.1.2.4 OUTAGES OR FORCED REDUCTIONS IN POWER UNIT NAME nenng, unte 9 (Over 20 Percent of Design Power Level and Longer Than Four Hours) REPORT MONTH um.m mu, ,- tou
.
SYSTEM CAUSE OR CORRECTIVE SAFETY-RELATED COMPONENT DURATION REPORTABLE ALTIONS MAINTENANCE DATE AFFECTED (HOURS) REASON OCCURRENCE NUMBER Summary: There was no single release of radioactivity or unusual radiation exposure specifically
." associated with any outage which accounted for U more than 10 percent of the allowable annual 5 values.
I Unit operated at essentially 100 a.E@ IPMENT FAILURE (EXPLAIN) E-DPERATOR TRAINING AND LICEN5E EX N percent full power for the entire g. MAINTENANCE OR TESTING F-ADMINISTRATIVE month
- C-REFUELING G-0PERATIONAL ERROR (EXPLAIN)
R NFr.lil A10RY Pf 5TRICTinff 11 GillfR IIXPI AIN)
.
2.11.1.3 Unit 3 2.11.1.3.1 Operating Experien-Following completion of the refueling outage, heatup was conducted on November 11, 1976. At approximately 20 percent full power control rod 3The in group 6 dropped unit was brought back into the core due to a shorted control rod drive stator. on-line on November 13, 1976. On November 14, 1976 the reactor was tripped from 38 percent full power when a test was performed on the turbine thrust bearing wear detector circuitry. The reactor was brought to 23 percent full power on the same day but due to high vibration on the*3B1" reactor coolant pump the reactor was brought to hot standby. On November 15, 1976 the generator was brought on-line On November 17, 1976 and power sas held at 40 percent full power for equilibrium. Test- , power was increased to 7520,percent 1976 full power for power escalation testing.and ing was completed on November power. The unit continued power operation the duration of the month. 2.11.1.3.2 Changes, Tests and Experiments not requiring prior NRC approval. The following changes, tests and experiments were carried out without prior NRC approval pursuant to 10CFR50.59 during November,1976. The
- 1. Revisions 0 through 8 of station modification ON-140 were completed.
modification moved PCB #25 to position #28 and placed a new breaker in posi-tion #30. The change will improve the reliability of the auxiliary power circuits through transformers CT2 and CT3.
- 2. Revision 0 of station modification ON-234 was completed. The modification involved the installation of new orifices in the test solenoids of main steam stop valves 1, 3, and 4. The change will assure closure time of 15 seconds or less, and prevent the valves from slamming closed.
- 3. Revision 0 of station modification ON-362 was completed. The modification involved the addition of public address system speakers at the top and bottom of each steam generator cavity. The speakers will improve communi-cation in the Reactor Building.
- 4. Revisions 0 and 1 of station modification ON-366 were completed. The modi-fication altered Reactor Building cooling fan logic to assure that all fans The new run at slow speed on receipt of an engineered safeguard signal.
logic will reflect FSAR requirements. The
- 5. Revision 1 of Part C of station modification ON-367 was completed.
direction error sensing signal fault circuitry in the control rod drive system was modified to eleminate spurious signals.
- 6. Revision 0 of station modification ON-368 wao completed. The modification revised the control rod drive logic so that rod groups 1, 2, 3, and 4 are not controlled by the integrated Control System. These groups will be controlled by the operatcr in the manual sequence override mode.
- 7. Revision 0 of station modification OS-450 was completed. The modification installed a deflector plate around the quench tank rupture disc.
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2.11-7 i L
- 8. Revisions 0 and 3 of station modification ON-458 was completed. The modifi-cation rerouted the emergency feedwater bypass line around the tendon anchor.
- 9. Revision 0 of station modification ON-466 was completed. The modification involved the installation of drain piping from the emergency feedwater pump turbine atmospheric discharge to the floor drain. This change will provide a method to drain any water accumu.'ation in the discharge. *
- 10. Revision 1 of station modification 0.1-468 was completed. The modification involved the addition of diodes across the coils of relays in the Electro-Hydrualic Control System. The diodes will suppress signal spiking.
- 11. Revision 0 of station modification ON-469 was completed. The modification .
added lock cylinders and thumb turns to the cable room doors to allow these doors to be locked with a key from the outside.
- 12. Revisions 0, 1, 3, and 6 of station modification ON-497 were completed. The modification involved the replacement of Velan valves, HP 154, HP 155 and HP-156, with more reliable Kerotest valves.
- 13. Revisions 0, 1, 3, 6, and 7 of station modification ON-502 were completed.
The modification replaced and relocated valves RC-4 and RC-66 to increase the reliability of these valves.
- 14. Revisions 0, 16, 17, and 18 of station modification ON-507 were completed.
The modification will prevent undesired boron concentration after a postu-lated loss of coolant accident.
- 15. Revision 0 of station modification ON-512 was completed. This modification involved the replacement of the existing reactor coolant pressure transmitters with more reliable Rosemount transmitters.
- 16. Revision 0 of station modification ON-546 was completed. The modification re-placed six pressurizer Instrumentation root valves on the pressurizer with more reliable Kerotest valves.
- 17. Revisions 0, 6, 7, 9, 10, 11, 12, and 13 of station modification ON-547 were completed. The modification deleted the reactor coolant pump seal leakage standpipe and associated transmitters and added a new flow measuring device.
- 18. Revision 0 and 1 of station modification ON-551 were completed. The modifi-cation involved the replacement of the two stage seal assembly in the 3A1, and 3A2 reactor coolant pumps with a more reliable three seal assembly.
- 19. Revision 0 of station modification ON-557 was completed. The modification added a relay in each gate drive assembly of control rod groups 5, 6, 7 and in the auxiliary supply.
- 20. Revisions 0 and 1 of station modification ON-563 were completed. The modifi-cation involved the addition of one, three-phase, overvoltage relay to ini-tiate a timer on the 525 KV switchyard South Mountain Line shunt reactors.
The timer will trip the shunt reactor lockout relay at a pre-determined time after a phase to neutral overvoltage occurs. This change will protect the shunt reactors from overvoltage conditions. 2.11-8
- 21. Revision 0 of station modification ON-574 was completed. The modification upgraded the isolated phase bus duct that extends f rom the generator tolinkages with the turbine.
The change replaced the isolated phase bus duct external linkages and the duct damper pivot shaf ts with stronger shaf ts. The
- 22. Revision 0, Part B of station modification ON-576 was completed.
modification involved installation of backup plates to stiffen the oil pans on the reactor coolant pump motor lower oil pots. The plates will reduce oil leakage from the pots.
- 23. Revision 4 of station modification ON-579 was completed. The modification replaced several Velan valves on steam generator 3A and 3B with more reliable l
Kerotest valves. The Velan valves were beyond repair and no spare parts were , available,
- 24. Revision 0 of station modification ON-598 was completed. The modification involved the installation of visual targets in the Type SBEU Westinghouse breaker failure relays. The targets provide visual indication of breaker failure relay operation.
- 25. Revisions 0 and 1 of station modification ON-605 were completed. The "D" heater emergency bypass piping to the condenser was modified to allow the "D" flash tank to properly dump to the condenser.
The
- 26. Revisions 0, 1, 2, and 3 of station modification ON-640 were completed.
modification replaced the existing pressurizer spray control valve, 3RC-1, with a canned solenoid operated valve to provide for proper operation of the valve.
- 27. Revision 0 of station modification ON-657 was completed. The spent fuel cask decontamination pit cover was modified to facilitate handling of the cover lids.
- 28. Revision 0 of station modification ON-658 was completed. The modification involved the removal of the surveillance specimen holder tubes from the reactor core support assembly and the damaged sections of the shroud tub es . The surveillance specimen holder tubes are no longer functional as installed.
Revision 0 and 1 of ctation modification ON-681 were completed. The modi-29. fication involved the removal of the fixed bleed orifice plugs from the snubber valve on various hydraulic suppressors to allow the suppressors to be set at appropriate bleed rates.
- 30. Revision 0 oi station modification ON-693 was completed. The modification added a manual valving arrangement to the air piping on the condenser dis-charge valve operators.
The manual valves will vent air from the opening side of the condenser discharge valve and supply air to the closing side to assure the closure of the cylinder.
'
- 31. Revision 0 of station modification ON-696 was completed. The modification replaced the guide and snubber on the axial power shaping control rod drive mechanism to provide better clearance between the torque taker and motor tube.
2.11-9
,
d
- 32. Revision 0 of station modification ON-707 was completed. The modification involved the addition of a tanker to the upper settling basin for removal and storage powdex backwash f rom the polishing demineralizer.
2.11.1.3.3 Maintenance The following safety related maintenance was performed during November,1976. This section excludes major safety related corrective maintenance reported in 2.11.1.3.4. See the October data sheet for details of the refueling outage which continued through the month of November.
.
d f I 1 i 3 i i i 2.11-10 1
-.g _.f-,
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DOCKET NO. 50 - 287 Oconee Unic 3 UNIT NAME OUTAGES OR FORCED REDUCTIONS IN POWER 2.11.1.3.4 REPORT M0filH November, 1976 (Over 20 Percent of Design Power Level and Longer Than Four Hours) SYSTEM CORRECTIVE SAFETY-RELATED CAUSE OR ACTIONS MAINTENANCE DURATION REPORTABLE COMPONENT (HOURS) REASON OCCURRENCE DATE AFFECTED NUMBER Continuation of refueling outage. 260.48 C 11/1/76 Control rod drive stator was replaced. 40.11 A 11/11/76 Unit tripped from 20 percent full power when control rod 3 in group 6 dropped into the core due to a shorted control rod drive stator. The Westinghouse llCA type relays will be 4.80 B 11/14/76 Unit trpppied from 30 percent full replaced and the test circuiting will be power during a test of the turbine modified. thrust bearing wear detector test circuiting. 9.70 A The problem resulted from a faulty vibration 11/14/76 Reactor brought to hot standby f rom probe which was repaired. 23 percent f ull power due to high vibration on the#3BI reactor coolant Pump. Summary: There was no single release of radioactivity or unusual radiation exposure specifically u associated with any outage which accounted fo r L more than 10 percent of the allowable annual 7 values. l
~ E-OPERATOR TRAINING AND LIEEN5E EXAMINAll0N A-EQUlPHENT FAILURE LEXPLAIN) F-ADMINISTRATIVE B-MAINTENANCE OR TESTING G-OPERATIONAL ERROR (EXPLAIN)
C-REFUELING H-0THER (EXPLAIN) 0-REGULATORY RESTRICTION *
.- . - _ - _ _ _ _ - . - _ _ _ _ -
2.12 REPORT FOR DECEMBER, 1976
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2.12-1
2.12.1 OPERATIONS
SUMMARY
2.12.1.1 Unit 1 2.12.1.1.1 Operating Experience Oconee Unit I was shut down for repair work on the turbine-generator bearings at the beginning of December,1976. Reactor criticality was reached on December 7,1976, and 90 percent full power was reached the same day. On December 8, 1976, the unit was shut down to repair a steam generator tube leak in the "1B" once through steam generator. The outage was further extended on December 20, 1976, to repair hydraulic shock suppressors. The unit was placed back in service on December 21, 1976, and reached 100 percent full power on December 23, 1976. The unit continued full power operation the duration of - the month. 2.12.1.1.2 Changes, Tests and Experiments Not Requiring Prior NRC Approval The following changes, tests and experiments were carried out without prior NRC approval pursuant to 10CFR50.59 during December, 1976.
- 1. Revision 3 of station modification ON-118 was completed. The modification involved the addition of resistors on breaker failure relays in the 230 KV switchyard to scrrect a low energy instability problem and insure coil.
operation on the respective target relays for Control Room indication.
- 2. Revision 0 of station modification ON-552 was completed. The modification involved the replacement of the present governor pressure pump pilot valve springs with higher scaled springs to increase governor pressure.
- 3. Revision 0 of station modification ON-710 was completed. The modification added seismic restraints on the concrete base for the 230 KV transformer at Keowee. The restraints will prevent the transformer from sliding in case of an earthquake.
- 4. Revision 0 of station modification ON-722 was completed. The main steam radiation monitors, RIA-16 and 17, were modified to improve check source operation.
- 5. Revision 0 of station modification ON-725 was completed. The modification involved the plugging and stabilizing of leaking and questionable "1B" steam generator tubes.
2.12.1.1.3 Maintenance The following safety related maintenance was performed during December, 1976. This section excludes major safety _ related corrective maintenance reported in 2.12.1.1.4. One valve on the Demineralized Water System was repaired by replacing the diaphragm in the valve. Two gaskets were replaced in the letdown storage tank filters housing due to leaks. The concentrated boric acid storage tank pump was repaired by adjusting the compensator relief valve on the - pump. 2.12-2
DOCKET NO. 50 - 269 UNIT NAME Oconee Unit 1 OUTAGES OR FORCED REDUCTIONS IN POWER 2.12.1.1.4 ' REPORT MONTH December, 1976 (Over 20 Percent of Design Power Level and Longer Than Four Hours) SYSTEM CORRECTIVE SAFETY-RELATED CAUSE OR ACTIONS MAINTENANCE DURATION REPORTABLE COMPONENT (HOURS) REASON OCCURRENCE DATE AFFECTED NUMBER See corrective action for November, 1976. Continuation of previous outage. 145.56 A 12/1/76 RO 269/76-19 one leaking tube and two questionable tubes Unit was shutdown from 90 percent 287.46 A 12/8/76 were plugged. Investigation is being conducted full power to repair "1B" steam by Babcox and Wilcox the NSSS vendor. generator tube leaks. 36.77 A During the outage eight hydraulic suppressors 12/20/76 The previous outage was extended to were replaced. Also, one low pressure injection repair hydraulic shock suppressors. root valve was repaired by adjusting the packing. Summary: There was no single release of radioactivity or unusual radiation exposure specifically associated with any outage which accounted fo - more than 10 percent of the allowable annual
.N
[ values. l l E-CPERATOR TRAINING AND LICENSE EXAMINATION A-EQUIPMENT FAILURE (EXPLAIN) F-ADMINISTRATIVE 0-MAINTENANCE OR TESTING C-REFUELING G-OPERATIONAL ERROR (EXPLAIN) 11 tilill H, l1111'l AlN) h Hiltli AIONY Hi%lHlfilnN
i 1 2.12.1.2 Unit 2 l 2.12.1.2.1 Operating Experience l Oconee Unit 2 continued essentially full power operation until December 4,1976, when the unit was shut down to repair a steam generator tube leak in the "2B" OTSG. Repairs were completed on December 19, 1976, but the outage was extended to replace valve 2HP58, the "B" letdown filter outlet valve. The unit was placed back on line on December 25. 1976. Full power operation was reached on i December 27, 1976, but the reactor tripped shortly thereafter due to control rod groups 6 and 7 falling into the core during a control rod drive test. The unit was brought back on line on December 28, 1976, and reached 100 percent full power on December 29, 1976. Full power operation was maintained for the duration of the month. , 2.12.1.2.2 Changes, Tests and Experiments Not Requiring Prior NRC Approval. The following changes, tests and experiments were carried out without prior NRC approval pursuant to 10CFR50.59 during December, 1976.
- 1. Revision 1 of station modification ON-73 was completed. The modification involved the installation of low yield blast door.a at the access area to the Control Room for protection against pipe whip in the event of high energy pipe breaks.
- 2. Revision 3 of station nodification ON-118 was completed. The modification involved the addition of resistors on breaker failure relays in the 230 KV switchyard to correct a low energy instability problem and insure coil operation on the respective target
- relays for Control Room indication.
- 3. Revision 0 of station modification ON-552 was completed. The modification involved the rnplacement of the present governor pressure pump pilot valve springs with higher scaled springs to increase governor pressure.
- 4. Revision 0 of station modification ON-673 was completed. The modification involved changes to the resistor and potentiometers of all area radiatior monitors except RIA-16 and 17. The chrages will allow proper correlatiot, between actual monitor setpoints and setpoints shown < 1 the module meter.
- 5. Revision 0 of station modification ON-593 was completed. The modification added a manual valving arrangement to the air piping on the condenser dis-charge valve operators. The manual valves will vent air from the opening side of the condenser discharge valve and supply air to the closing side to assure closure of the cylinder.
- 6. Revisions 0 and 1 of station modification ON-708 were completed. Velan valves 2MS-141 and 2MS-142 and Velan valve 2RC-31 were replaced by Kerotest valvec. The Velan valves showed poor performance and no spare parts were available.
- 7. Revision 0 of station modification ON-710 was completed. The modification added seismic restraints on the concrete base for the 230 KV transformer at Keowee. The restraints will prevent the transformer from sliding in case of an earthquake.
2.12-4
Velan
- 8. Revisions 1 and 2 of station modification ON-716 were completed.
valve 2HV-56 was replaced by a Kerotest valve. The Velan valve showed ' poor performance and no spare parts were available.
- 9. Revision 0 of station modification ON-722 was completed. The main steam radiation monitors, RIA-16 and 17, were modified to improve check source operation.
2.12.1.2.3 Maintenance ! The following safety related maintenance was performed during December,1976. This section excludes major safety related corrective maintenance reported in 2.12.1.2.4. ,
.
No safety related maintenance was performed. i
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j 2.12-5
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_ _ _ _ . - . .. - . _ - - . -- - DOCKET NO. 50 - 270 2.12.1.2.4 OUTAGES OR FORCED REDUCTIONS IN POWER UNIT NAME Oconee Unit 2 (Over 20 Percent of Design Power Level and Longer Than Four Hours) REPORT MONTH December, 1976 SYSTEM CAUSE OR CORRECTIVE SAFETY-RELATED COMPONENT DURATION REPORTABLE ACTIONS MAINTENANCE DATE AFFECTED (HOURS) REASON OCCURRENCE [ NUMBER -12/4/76 Unit was shutdown from 97 percent 344.90 A RO 270/76-15 Sections of the leaking tube and one other full power to repair a "2B" steam questionable tube were removed for analysis. generator leak. These tubes and another tube with possible damage were plugged. Fifteen valves were repacked in the following systems, eight in the Feedwater System, three in the Main Steam , one in the I.PSW, two in the HP, and one in the SO. Also during the outage four hydraulic suppressors were repaired by replacing the piston rod seals. One core flood tank level transmitter required recalibration. A transmit ter was replaced in the Reactor Protection System, and an amplifier required recalibration on the Reactor Building pressure detector. A valve on the Building
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Purge System was repaired by replacing a diaphragm in the air vent valve. The auxiliary feedwater nozzles were inspected and a weld was replaced on the nozzle retaining collar on all of the feedwater nozzles. A flange gasket was replaced in the header for the main feedwater nozzles. Two body to bonnet leak on two safety-related valves one in the MS and one in the RC were repaired by replacing the B/B gasket. Suneary: There was no single release of radioactivity or unusual radiation exposure specifically y associated with any outage which accounted for
- g more than 10 percent of the allowable annual y values, os A-EQLilPMENT FAILURE (EXPLAIN) E-OPEAATOR TRAINING AND LICENSE EXAMINATION 3-MAINTENANCE OR TESTING F-ADMINISTRATIVE C-REFUELING G-0PERATIONAL [RROR (EXPLAIN) n pionsiony pisipirienn n oiiiin fixit rin)
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DOCKET NO. 50-270 UNIT NAME oconee Unit 2 9 2.12.1.2.4 OUTAGES OR FORCED REDUCTIONS IN POWER December, 1976 (page 2) REPORT MONTH (Over 20 Percent of Design Power Level and Longer Than Four Hours)
,
SYSTEM CORRECTIVE SAFETY-RELATED CAUSE OR ACTIONS MAINTENANCE DURATION REPORTABLE COMPONENT OCCURRENCE AFFECTED (HOURS) REASON DATE NUMBER
!
One hinge pin gasket was replaced on a check valve in the Feedwater System. Two valves were repaired by relapping the seats, one in the CWD System and one in the llP System. The ; e main flange gasket on the pressurizer relief valve required replacement due to leakage, i One letdown body gasket was replaced due to leakage. An oil leak resulted from a failed gasket on a bearing oil inlet on the emergency feedwater pump turbine. 147.30 A The "B" letdown filter outlet valve was 12/19/76 Previous outage was continued to replaced. replace the "B" letdown f11ter outlet valve. A RO 270/76-17 The control rod power supplies for groups 6 13.73 12/27/76 Unit' tripped from 100 percent full and 7 were repaired by replacing two gate power due to control rod groups 6 drive modules, a blown fuse, and two diodes and 7 falling into the core during a that had failed. control rod drive test. There was no single release of radioactivity (y Summary: or unusual radiation exposure specifically
" associated with any outage which accounted fo r more than 10 percent of the allowable annual l E-OPERATOR TRAINING AND LICEN5E EXAMINATI A-EQUlPMENT FAILURE (EXPLAIN) F-ADMINISTRATIVE values. 3-NAINTENANCE OR TESTING G-OPERATIONAL ERROR (EXPLAIN) ,
C-REFUELING n nini,e (lxrlain) n niini simiy pr ,ipirlinn 1
2.12.1.3 Unit 3 2.12.1.3.1 Operating Experience Oconee bnit 3 continued full power operation until December 1, 1976, when power was reduced to 95 percent full power for physics testing. Full power operation was resumed on December 2, 1976, but was reduced to 92 percent full power on the same day for physics testing. On December 3, 1976, the unit resumed 100 percent full power operation for the duration of the month. 2.12.1.3.2 Changes, Tests and Experiments Not Requiring Prior NRC Approval The following changes, tests and experiments were carried out without prior NRC " approval pursuant to 10CFR50.59 during December,1976.
- 1. Revision 3 of station modification ON-118 was completed. The modification involved the addition of resistors on breaker failure relays in the 230 KV switchyard to correct a low energy instability problem and insure coil operation on the respective target relays for Control Room indication.
- 2. Revision 0 of station modification ON-552 was completed. The modification involved the replacement of the present governor pressure pump pilot valve springs with higher scaled springs to increase governor pressure.
1
- 3. Revision 0 of station modification ON-672 was completed. The modification involved the installation of monorails over the condensate booster pumps, low pressure service water pumps and "E" heater drain pumps for use in pump and motor maintenance.
- 4. Revision 0 of station modification ON-710 was completed. The modification
'
added seismic restraints on the concrete base for the 230 KV transformer at Keowee. The restraints will prevent the transformer from sliding in case of an earthquake. 2.12.1.3.3 Maintenance The following safety related amintenance was performed during December,1976. This section excludes major safety related corrective maintenance reported in 2.12.1.3.4. A feedwat,r system valve motor operator was repaired by replacing the torque switch which failed. A valve was not sealing properly in the HPI System and a diaphragm had to be replaced in the valve. A neutron detector in the Reactor Protective System had to be recalibrated. A filter element in the Low Pressure Service Water had to be replaced due to the clogging of the filter. One channel of the Reactor Protective System had to be recalibrated. Several tendon caps on the reactor building had to be repaired by replacing rubber rashers on the caps. 2.12-8
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DOCKET NO. 50 - 287 UNIT NAME Oconee Unit 3 OUTAGES OR FORCED REDUCTIONS IN POWER 2.12.1.3.4 December. 1976 REPORT MONTH (Over 20 Percent of Design Power Level and Longer Than Four Hours) SYSTEM CORRECTIVE SAFETY-RELATED I OR ACTIONS MAINTENANCE CAUSE REPORTABLE COMPONENT DURATION (HOURS) REASON OCCURRENCE DATE AFFECTED NUMBER
!
t i
!
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l
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i i Summary: There was no single release of radioactivity or unusual radiation exposure specifically associated with any outage which accounced for - l I more than 10 percent of the ' allowable annual ! values. There were no outages or forced w
,
reductions in power over 20 percent of design g power during the month. 4
-
l E-OPERATOR TRAINING' AhD LICEN5E EXAMINATIO A-EQulPMENT FAILURE (EXPLAIN) "-ADMINISTRATIVE 3-MAINTENANCE OR TESTING C-REFUELING
- s. 0?E,RATI,O,NAL, . ERROR (EXPLAIN)
..,u,,,, , , , . . .
.--.............
, 2.13 ENVIRONMENTAL MONITORING' Table 2.13-1 summarizes the environmental monitoring program for the period of this report. For each medium sampled, the following information is presented: Column 1 - Number of sampling locations 2 - Total number of samples . 3 - Number of locations at which levels were found to be significantly above local background 4 - Highest concentration or radiation level for the sampling point with the highest average 5 - Lowest concentration or radiation level for the sampling point with the highest average - 6 - Annual average concentration or radiation level for the sampling point with the highest average 7 - Location of the sampling point with the highest average Tables 2.13-2 and 2.13-3 provide the locations of milk animals determined by survey for the area within a five-mile radius of the site. Within the 15 mren/ year isodose line a door-to-door or equivalent counting technione was utilized. Outside the 15 mrem / year isodose line, but within five miles, reliakle sources such as county agricultural agents were used to ob ain t nilk animal numbers and locations. 2.13-1
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SD11-A:!NUAL PERIOD g
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JANUARY-JU:!E 1976 ,
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MILCH A'il !ALS ,
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DIRECTION ;
NAME FROM STATION COWS COATS i
' B. Powall 4.5 mi. U 65
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J. G. Dyar 1.25 mi. WSW 2*
- j J. Smith 4.25 mi. E NOT AVAILABLE SOLD COW W. E. Steele 3.25 mi. E NOT AVAILABLE SOLD COW M. Ladd 3.5 mi. W NOT AVAILABLE
- SOLD COW Stephens 3.6 mi. E 1*
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C. Hale 4.5 mi. W 1* , T. I. Miller 2.8 mi. ESE 1*
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F. M. Crana 3.75 mi. SE 3 1* 1 1 I
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- Have milk for persons 1 usa only; vill not sell milk for our sacples. I
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- Table ?. 13-3 Semi-Annual Period July - December 1976 Milch Animals Direction From Goats Station Cows _
Name 4.5 mi. W 65 B. Powell 1 J. G. Dyar 1.25 mi. WSW Stephens 3.6 mi. E. Not Available ' 4 1* C. Hale 4.5 mi. W. 2.8 mi. ESE 1* T. I. Miller 3* 1* F. M. Crane 3.75 mi. SE . 4 mi. ENE 1 L. C. Few 2 E. H. Holder 3 mi. SE . 1 H. A. Merril 4 ,mi. NNW 3 mi. E 1* David Merch 3 mi. E 1* W. M. Lusk 4.5 mi, ESE 1* A. M. Rampey
- Have milk for personal use only; will not sell milk for our samples.
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2.13-4
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_ i 1 2.14 PERSONNEI EXPOSURE AND MONITORLNG ' l Table 2.14-1 contains a tabulation (supplementing the requirements of 10 CFR 20.407) of the number of personnel reuaiving ixposures greater than 100 mrem ! in the reporting period and their associated man-rem exposure, according to i duty function, e.g., routine plant surveillance and inspection, routine plant. j maintenance, special plant maintenance, routine fueling operation, special refueling operation, and other job-related exposures for the period January 1, 1976 through December 31, 1976.
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TN11ATlat & MMIR & IUGIHl. NO FDGil-fiM BY WIK #0 JE RfCT!01 RR IT6
- NUMBER OF PERSONNEL (*l00 MREM) TOTAL PERSON-REM STATION UTILITY CONTRACT WORKERS STAfl0N UTILITY CONTRACT WORKERS AND OTHERS (MPLOYEES EPPLOYfE5 ANO OTHERS EMPLOYEES EMPLOYEES R_f ACTOR OPERATION 5 $ SURvtILLANCE 2.46 -
i 2
- 1.52 Malatenance Personnel -
30.22 0.57 - 27 2 Operating Personnel 5.21 1.53 3.47 3 Health Physics Persorial 5 8
- - 1.56 -- -
supervisory Personnel 5 14.13 6.54 3.4 17 2 3 Engineering Personnel ROUTINE MAINTENANCE 46 7 26.61 55.03 7.5 Maintenance Personnel 18 2 22.6 0.43 -- Operating Personnel 20 I.56 3.52 Health Physics Personnel 5 I 3 5.28 -- Supervisory Personnel 3
- - 0.27 --
i I 4 0.99 0.43 3.8 Engineering Personnel INSERvlCl $NSPECTION 3 7.26 15.72 2.47 Malatenance Personnel 5 13 -- --
- --
-
Cperating Personnel - 1.46 0.43 0.99 Health Physics Personnel I I i
-
- -- 0.35 --
Supervisory Personnel 1 2.06 2.3 20.01 2 3 26 Engineering Personnel SPftlAL MAINTENANCf 30 106.32 219.9) 29.96 Maintenance Personnel 71 183 -- 2
- 30.96 0.59 Operating Personnel 27 6.65 16.79 20 5 13 22.97 Health Physics Personnel - 2.53 n.17 --
7 I Supervisory Personnel 23.1 11.07 102.l7 27 19 134 Engineering Personnel WAsif PAOCES$1NG I 2.06 4.25 0.59 Maintenance Personnel I 4 18 I - 20.81 0.39 -- Operating Personnel 0.RI 0.77 -- Health Physics Personnel i I -
--
- - 0.12 --
Supervisory Personnel 1
- 0.05 -- 0.19 1 1 Engineering Personnel
*E FUE L ING 7 23.9 49.43 6.7%
16 41 Malatenance Personnel - 37.79 0.72 -- Cperating Personnel 34 3 --
-
- 3.4 --
Health Physics Personnel 1
- - -- -- --
-
Supervisory Personnel 4.04 1.74 12.61 Engineering Personnel $ ) 16
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TOTAL N 48 167.67 346.82 47.27
- Malatenance Personnel 112 289 --
126 to - 142.3% 2.7 Operating Personnel 71 Health Physics Personnel 33 9 20
-
37.13 4.48 10.9% 0.72 24.76
--
Supervisory Personnel 14 2 N 182 44.37 la.09 339.49 Engineering Personnel 53 24 196.03 181.26 211.58 338 338 250 CRAM TOTAL 6
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2.15 FUEL EXAMINATIONS 2.15.1 Unit 1 Post Irradiation Examination was conducted on sixteen fuel assemblies at the end of Oconee Unit I cycle 2. The PIE program included measurements of assembly growth and rod growth, line scan profilomety and distructive examination of one discharged assembly. No indications of failed fuel were found. A small tear was found on the lower grid skirt of fuel assembly 1C66 but the tear did not affect the integrity of the fuel and was corrected. 2.15.2 Unit 2
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Two programs were carried out using the PIE equipment in the spent fuel pool. One was a first-cycle NDT inspection of two fuel assemblies with special fuel and clad specimens being conducted for the Electric Power Research Institute. The other was a detailed visual examination of two assemblies for evidence of lift. No indications of failed fuel were found. 2.15.3 Unit 3 There were no fuel examinations conducted on Oconee Unit 3 during 1976. 2.15-1 -.
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NOTICE - THE ATTACHED FILES ARE OFFICIAL RECORDS OF THE DIVISION OF DOCUMENT CONTROL. THEY HAVE BEEN CHARGED TO YOU FOR A LIMITED TIME PERI,OD AND MUST BE RETURNED TO THE RECORDS FACILITY BRANCH 016. PLEASE DO NOT SEND DOCUMENTS CHARGED OUT THROUGH THE M AIL. REMOVAL OF ANY PAGE(S) FROM DOCUMENT FOR REPRODUCTION MUST BE REFERRED TO FILE PERSONNEL.
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STEAM PRODUCTION DEPARTMENT i ' OCONEE NUCLEAR STATION i ANNUAL OPERATING REPORT
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l 1976 l
VOLUME 2
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DUKE POWER COMPANY STEAM PRODUCTION DEPARTMENT OCONEE NUCLEAR STATION
ANNUAL OPERATING REPORT , 1976 VOLUME 2
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TABLE OF CONTENTS VOLUME I
- 1. Non-Radiological Environmental Surveillance Report
- 1. Introduction 1.1 Station Cooling Water Systems Thermal Limits 1.2 Chemical Discharge Limits 1.3 General Aquatic Surveillance 1.3.1 Water Quality 1.3.2 Fish-Population Dynamics and Reproduction 1.3.3 Periphyton 1.3.4 Phytoplankton-Zooplankton Receiving Water Study 1.3.5 Benthos 1.4 Fish Impingement on Intake Screens and Entrainment of Fish Eggs and Larvae 1.5 Phytoplankton-Zooplankton Entrainment Mortality Study 1.6 Plume Mapping for Temperature and Dissolved Oxygen 1.7 Gas-Bubble Disease Study II. Annual Operating Report
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- 2. Introduction 2.1 Report for January,1976 2.2 Report for February, 1976 2.3 Report for March, 1976 2.4 Report for April, 1976 2.5 Report for May, 1976 2.6 Report for June, 1976 2.7 Report for July, 1976 2.8 Report for August, 1976 2.9 Report for September, 1976 2.10 Report for October, 1976
, 2.11 Report for November, 1976 2.12 Report for December, 1976 2.13 Environmental Monitoring 2.14 Personnel Exposure and Monitoring 2.15 Fuel Examinations
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TABLE OF CONTENTS VOLUME II Appendix A - Tabulated Water Quality Data Lakes Keowee and Hartwell Appendix B - Tabulated Biological Data VOLUME III
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Appendix C - SERI Highlights of Activities for Fiscal Year 1976 Appendix D - SERI Report of Progress and Evaluation for Fiscal Year 1977 and Excerpts from Proposed Annual Work Plan for Fiscal Year 1978 Appendix E - Oconee Nuclear Station i Plume Mapping Studies Appendix F - Operational Environmental Radioactivity Monitoring Data l l
APPENDIX A TABULATED WATER QUALITY DATA
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LAKES KE0 WEE AND HARTWELL SECTION I TYPE I DATA SECTION II TYPE II DATA SECTION III TYPE III DATA SECTION IV TYPE IV DATA SECTION V CONTINUOUS RECORDING DATA Negative Values -1.0 through -3.0 Used in Depth Columns Represent:
-1.0 = Composites taken from 0.3 m, mid-depth and bottom -2.0 = Composities taken from each depth sampled -3.0 = Composities taken from 0.3 m, mid-deph euphotic zone, and at depths of 1% incident light
APPE MIX A SFCTION I WATER OPALITY TYPE I DATA LAKES KF0 VEE A'T ITARTNELL YEAR 1976 (Pages 1-265 Contained in Previous Oconee Semi annital "enorts)
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