ML14183A983
| ML14183A983 | |
| Person / Time | |
|---|---|
| Site: | Robinson  |
| Issue date: | 03/30/1983 |
| From: | Starkey R Carolina Power & Light Co |
| To: | O'Reilly J NRC Office of Inspection & Enforcement (IE Region II) |
| Shared Package | |
| ML14183A984 | List: |
| References | |
| RSEP-83-393, NUDOCS 8304060066 | |
| Download: ML14183A983 (61) | |
Text
)RET mTRF1L Shearon Harris Energy & Environmental Center Carolina Power & Light Company New Hill, North Carolina ENVIRONMENTAL RADIOLOGICAL MONITORING REPORT FOR H. B. ROBINSON-STEAM ELECTRIC PLANT JANUARY 1, 1982, THROUGH DECEMBER 31, 1982 Prepared By:
Don H. Edwards Senior Specialist -
Environmental Reviewed By:
Ron Shearin Project Specialist - Environmental Approved By:
Principal Specialist - Environmental March 18, 1983
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Carolina Power & Light Company H. B. ROBINSON STEAM ELECTRIC PLANT POST OFFICE BOX 790 HARTSVILLE, SOUTH CAROLINA 29550 MAR 321983 Robinson File No:
12510C Serial:
RSEP/83-393 Mr. James P. O'Reilly Regional Administrator U. S. Nuclear Regulatory Commission Region II 101 Marietta Street, Suite 3100 Atlanta, Georgia 30303
Dear Mr. O'Reilly:
The Annual Environmental Radiological Monitoring Report for 1982 is enclosed for your review. If you have any questions concerning this report, please feel free to contact me.
Very truly yours, R. B. Starkey, J General Manager H. B. Robinson S. E. Plant BAC/bw Enclosure cc:
Harold Denton (17) 9304O60066 830330 PDR ADOCK 05000261 R
TABLE OF CONTENTS Page
1.0 INTRODUCTION
1-1 1.1 Plant, and Location...
0.......*.........................
1.2 Radiological Impact Considerations...................
1-1 1.3 Environmental Monitoring Program.....................
1-1 2.0 PROGRAM
SUMMARY
2-1 3.0 INTERPRETATIONS AND CONCLUSIONS............................
3-1 3.1 Air Samples................................... *.....
3-1 3.2 Aquatic Vegetation and Bottom Sediment...............
3-9 3.3 Fish...........................
3-11 3.4 Vegetation...........................................
3-15 3.5 Groundwater......
3-16 3.6 Milk Samples......
3-16 3.7 Soil Samples....................
3-17 3.8 Surface Water...
3-18 3.9 Thermoluminescent Dosimetry Area Monitors............
3-26 3.10 Summary...........
3-26 4.0 MISSED SAMPLES AND ANALYSES......................
4-1 4.1 Air Particulate (Weekly).....................
4-1 4.2 Fish................................................
4-1 4.3 Environmental TLDs.............
4-1
LIST OF TABLES Table Page 1-1 Environmental Radiological Monitoring Program.............
1-5 2-1 Environmental Radiological Monitoring Program Summary..............................................
2-2 3-1 Radionuclides Detected During 1982 in Monthly Composited Air Particulate Sample and Fractional Occurrence...........................................
3-2 3-2 Average Concentration (pCi/g dry) and Fractional Occurrences of Radionuclides in Bottom Sediment and Aquatic Vegetation....................................
3-9 3-3 Average Concentration of Radionuclides in Fish Flesh......
3-11 3-4 Fish in Lake Bee Compared to Fish in H. B. Robinson Lake......................................................
3-12 3-5 Average Concentration (pCi/g dry) and Fractional Occurrences of Radionuclides in Cattle Feed and Food Crops...........................................
3-15 3-6 Ion Exchange Resin....................................
3-21 11
LIST OF FIGURES Figure Page 1-1 H. B. Robinson Unit No. 2 Environmental Radiological Sampling Points............
1-3 1-2 H. B. Robinson Unit No.-2 Environmental Radiological Sampling Points On Site..................
1-4 3-1 Plot of Air Particulate Gross Beta Activity by Date at Station 02 Versus Control Station Activity..
3-3 3-2 Plot of Air Particulate Gross Beta Activity by Date at Station 09 Versus Control Station Activity..............................................
3-4 3-3 Plot of Air Particulate Gross Beta Activity by Date at Station 17 Versus Control Station Activity..............................................
3-5 3-4 Plot of Air Particulate Gross Beta Activity by Date at Station 34 Versus Control Station Activity.................................
3-6 3-5 Plot of Air Particulate Gross Beta.Activity by Date at Station 35 Versus Control Station Activity........... *.....
..... 0...
3-7 3-6 Plot of Air Particulate Gross Beta Activity by Date at Station 36 Versus Control Station Activity................... o...................o........
3-8 3-7 Plot of Surface Water Gross Beta Activity by Date at Station 05 Versus Control Station Activity..............................
3-22 3-8 Plot of Surface Water Gross Beta Activity by Date at Station 08 Versus Control Station Activity...................
3-23 3-9 Plot of Surface Water Gross Beta Activity by Date at Station 11 Versus Control Station Activity,
.. oo..
3-24 3-10 Plot of Surface Water Gross Beta Activity by Date at Station 32 Versus Control Station Activity.......
1.0 INTRODUCTION
The following report summarizes the Environmental Radiological Monitoring conducted for the H. B. Robinson Steam Electric Plant during the calendar year 1982. This is the sixth year in which the program's sample analyses and data interpretation have been entirely performed by Carolina Power & Light Company.
1.1 Plant and Location The H. B. Robinson Steam Electric Plant is located in northeastern South Carolina near Hartsville and approximately 25 miles northwest of Florence.
This site includes a fossil-fueled plant, Unit 1, which was placed in service in
- 1960, and a pressurized water nuclear power reactor, Unit 2, which entered commercial operation on March 7, 1971.
The Robinson Impoundment (hereafter referred to as Lake Robinson) on the plant site was created for Unit 1 and is also a cooling reservoir for Unit 2. Lake Robinson has an area of 2,250 acres with plant intake at the south end, adjacent to the dam. Following condenser use, the water is returned by a 4.2-mile canal to the north end of Lake Robinson near the mouth of Black Creek which flows into the lake from the north.
1.2 Radiological Impact Considerations The most significant mode of population exposure due to plant operation is direct external radiation exposure due to the elevated plume of noble gases.
Other potentially important exposure path ways to man are the airborne radioiodine-pasture-milk and consump tion of fish from Lake Robinson.
Although a relatively insignifi cant dose is involved, contact with Lake Robinson including fish ing, boating, and immersion (swimming) is a secondary dose path to man.
1-1
1.3 Environmental Monitoring Program The significant elements of these exposure pathways were used to establish the present surveillance program.
The program, as pres ently implemented, is *an expansion of that required by the H. B.
Robinson Environmental Technical Specifications.
Table 1-1 details the surveillance program, and Figures 1-1 and 1-2 show the environ mental monitoring locations.
A tabulation of the specific methods used in monitoring the various pathways of exposure to man is as follows:
Gaseous Effluent Path Submersion Dose and Thermoluminescent Dosimetry other External Dose Area Monitors Vegetation Path Vegetation Samples Soil Samples Air Samples Inhalation Path Air Samples Milk Path Milk Samples Feed and Fodder Crop Air Samples Liquid Effluent Path Fish Path Surface Water Samples Bottom Sediment Samples Aquatic Vegetation Samples Fish Samples Water and Shoreline Dose Thermoluminescent Dosimetry Area Monitors Surface Water Samples Bottom Sediment Samples Shoreline Sediment Drinking Water Path Groundwater Samples 1-2
(39)
S.R. 102 S.R. 28 (40)
PRESTWOOD (22 LAKE (32)
HARTSVILLE S.R. 403 Station No. 36 Florence BLACK CREEK (41)(42)(43)(44)(45)
VARY Symbol Sample Type (17)
(29)
ROBINSON IMPOUNDMENT (20)
(19)
(18)
AC Air Cartridge AP Air Particulate (31)
AV Aquatic Vegetation SD Bottom Sediment FC Food Crop FH Fish (28)
FO Fodder and Feed (30)
GW Ground Water MK Milk (8)
SS Soil SW Surface Water (21)TL TLD (21)
H.B. ROBINSON T
L (7)
UNIT NO. 2 (5
CREEK Number Symbol
- 8.
- 15.
TL
- 17.
AC,APTL
- 18.
TL
- 19.
SS,TL
- 20.
TL.
- 21.
- 22.
- 27.
- 28.
TL
- 29.
TL
- 30.
TL
- 31.
TL
- 32.
- 36.
- 38.
FH
- 39.
MK FIGURE 1-1
- 40.
MK H. B. ROBINSON UNIT NO. 2
- 42.
FO MCBEE ENVIRONMENTAL RADIOLOGICAL SAMPLING POINTS
- 43.
FC
- 45.
FC
- 48.
FH
- 50.
NUMBER SYMBOL STATION SNUMBER SYMBOL
- 1.
TL
- 2.
- 12.
TL
- 3.
TL
- 13.
TL
- 4.
TL
- 14.
TL
- 5.
SD, R&GSW
- 16.
TL
- 6.
TL
- 23.
GW
- 7.
TL
- 24.
GW
- 9.
- 33.
- 10.
TL
- 35.
- 11.
- 49.
SS (12)
(4 9)
(35),
(1 0)
S(23)
(4)
(9)
(7)(6)(33)
(50)(24)
.3 UNIT NO. 1 (34)
((3)
UNIT NO. 2.
VISITOR CENTER SYMBOL SAMPLE TYPE AC Air Cartridge (18),
AP Air Particulate AV Aquatic Vegetation sD Bottom Sediment GW' Ground Water R&G Resin and Glasswool SS Soil SW Surface Water TL TLD FIGURE 1-2 H. B. ROBINSON UNIT NO. 2 1VIRONMENTAL RADIOLOGICAL SAMPLING POINTS ON SITE 1-4
TABLE 1-1 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM H. B. ROBINSON STEAM ELECTRIC PLANT Sampl e Sampling Type Sampling Point and Description Frequency Sample Size Sample Analysis Air 2-Visitors Center Weekly 300 cu. m.
Iodine Cartridge 9-Microwave Tower (AC) 17-East Shore of Lake Across from Plant Intake 22-Hartsville 34-End of Construction Road West of Plant 35-Dam (West End) 36-Florence Air 2-Visitors Center Weekly 300 cu. m.
Weekly--Gross Alpha Particulate 9-Microwave Tower and Gross Beta; Gamma (AP) 17-East Shore of Lake Across if Grgss Beta > 100 from Plant Intake pCi/mn, Monthly Com 22-Hartsville posite Gamma and 34-End of Construction Road Sr-89, 90 West of Plant 35-Dam (West End) 36-Florence
TABLE 1-1 (cont'd)
Sample Sampling Type Sampling Point and Description Frequency Sample Size Sample Analysis Aquatic 8-Discharge Canal Outfall Quarterly 500 grams Gross Beta, Gamma, and Vegetation 11-Black Creek at Road 1623 Sr-89, 90 (AV) 21-Bridge at North End of Lake 27-Black Creek at U.S. 1 32-Prestwood Lake 33-Ditch Behind Visitors Center Monthly 2 500 grams Gross Beta, Gamma, and 3
Sr-89, 90 50-Ash Pond Quarterly 500 grams Gamma Bottom 5-Plant Intake Quarterly 500 grams Gross Beta, K-40, Sediment 8-Discharge Canal Outfall Gamma, and Sr-89, 90 (SD) 11-Black Creek at Road 1623 21-Bridge at North End of Lake 27-Black Creek at U.S. 1 32-Prestwood Lake 33-Ditch Behind Visitors Center Monthly 2 500 grams Gross Beta, Gamma, and Sr-89, 90 Feed Crop 39-Lyndales's Farm Twice during 500 grams Gamma (FO) 40-Fink's Farm growing season (started 1977)
Fish 38-Site Varies within Quarterly 500 grams Flesh--Gross Beta, (FH)
Lake Robinson K-40, Gamma, and Sr-89, 90, Bone--Sr-89, 90
TABLE 1-1 (cont'd)
Sarmpl e Sampling Type Sampling Point and Description Frequency Sample Size Sample Analysis Food Crop 43-Varies One tobacco 500 grams Gamma (FC) sample during growing season and one sample after it has been cured (started 1977) 44-Varies Twice during 500 grams Gamma 45-Varies growing season (started 1977)
Groundwater 22-Hartsville Quarterly 4 liters Gross Alpha, Gross (GW) 23-Unit 1 Well near Site Entrance (started 1st Beta, Tritium, Gamma, 24-Well at West Side of Unit 2 quarter, 1977) and Sr-89, 90 Milk 39-Lyndale's Farm Monthly 8 liters Iodine, Gamma, and (MK) 40-Fink's Farm Sr-89, 90
TABLE 1-1 (cont'd)
Sample Sampling Type Sampling Point and Description Frequency Sample Size Sample Analysis Soil 2-Visitors Center
- Every 3 years 500 grams Gross Beta, K-40, (SS) 9-Microwave Tower Gamma, Sr-89, 90, 11-Black Creek at Road 1623 Single sample on a composite of each 19-East Shore of Lake taken at each station.
(North of 18) station, 1 22-Hartsville square foot 27-Black Creek at U.S. 1 by 1-inch deep 32-Prestwood Lake 34-End of Construction Road West of Plant 35-Dam (West End) 0o 36-Florence 49-East Shore of Lake at Semiannual 500 grams Gross Beta, K-40, Gamma Boat Launch (1 square foot by 1-inch deep) 50-Ash Pond3 Semiannual 500 grams K-40, Gamma (1 square foot by 1-inch deep)
- Two sample locations will be sampled semiannually on a rotating basis.
TABLE 1-1 (cont'd)
Sample Sampling Type Sampling Point and Description Frequency Sample Size Sample Analysis Surface 5-Plant Intake Weekly 2.5 liters Weekly--Gross Alpha, Water 8-Discharge Canal Outfall Gross Beta, and (SW) 32-Prestwood Lake Tritium, (Gamma and 11-Black Creek at Road 123 Twice Weekly 4 Sr-89, 90 if Gross 27-Black Creek at U.S. 1 Weekly Beta > 100 pCi/1)
(started on Monthly Composite-3/4/77)
Gross
- Alpha, Gross Beta, Tritium,
- Gamma, and Sr-89, 90 Quarterly Composite-Gross Alpha, Gross Beta, Tritium (Gamma Sr-89, 90 if Gross Beta > 100 pCi/1) 5-Plant Intake (Ion Exchange Weekly 2,000 liters Gamma Resin) 5-Plant Intake (Glasswool) 50-Ash Pond 4 Monthly 2.5 liters Gamma
TABLE 1-1 (cont'd)
Samipl e Sampling Type Sampling Point and Description Frequency Sample Size Sample Analysis External 1-South Property Line near Monthly Not TLD Readout Radiation Construction Road Applicable Dose 3-South Property Line near (TL)
Visitors Center 4-South Property Line near Road 1623 6-Robinson Unit 1 7-Robinson Unit 1 9-Microwave Tower 10-Picnic Area 11-Black Creek at Road 1623 12-Intersection of Roads 1623) and 1639 13-West Property Line near Construction Road 14-Intersection Area for Road 1623 and Route 151 15-Pine Ridge Baptist Church and Route 151 16-Route 151 -
0.5 mile North of Road 1623 17-East Shore of Lake across from Plant Intake 18-East Shore of Lake (North of 17) 19-East Shore of Lake (North of 18)
TABLE 1-1 (cont'd)
Sample Sampling Type Sampling Point and Description Frequency Sample Size Sample Analysis External 20-East Shore of Lake Monthly Not TLD Readout Radiation (North of j9)
Applicable Dose 22-Hartsville (TL) 28-Intersection of Transmission Lines and Route 151 (cont'd) 29-Intersection of S.C. 200 and Route 151 30-Intersection of S.C.
200 and S.C.
53 31-Kelly Town IControl Station 2This particular sampling station is an alternate pathway for low-level liquid releases to the environment.
Based on previous results, a more frequent sampling program has been implemented.
3This location was added in 1981 and will be sampled montly for surface water, semiannually for soil, and quarterly for aquatic vegetation.
4This location was sampled twice weekly as a result of a directive by the NRC to CP&L due to no composite sampler being available until the week of April 6, 1982.
2.0 PROGRAM
SUMMARY
The purpose of the Environmental Radiological Monitoring Program is to measure any release and accumulation of radioactivity in the environment, to determine whether this radioactivity is the result of the operation of the H. B. Robinson Plant, and to interpret the potential dose to off-site populations based on the cumulative measurement of radiation of plant origin.
Control stations are not specified in the technical specifications to the operating license.
For this report, the following locations were used as the control locations for the respective measurements and were intended to indicate conditions away from the H. B. Robinson Plant influence:
Hartsville (Sample Station 22)
Thermoluminescent Dosimetry Area Monitors Air Particulate Samples Charcoal Cartridge Samples - Airborne 1-131 Black Creek above Lake Robinson at U.S. #1 (Sample Station 27)
Aquatic Vegetation Bottom Sediment Surface Water No specific control locations have been designated for food crops, feed crops, soil, milk, fish, and groundwater, since none of the stations sampled are points selected to be unaffected by station effluents.
Table 2-1 summarizes the environmental radiological monitoring data for the entire year of 1982.
2-1
TABLE 2-1 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM
SUMMARY
H. B. Robinson Steam Electric Plant Docket Numbers -
50-261 Darlington County, Sorth Carolina Calendar Year 1982 Medium or Pathway Type and Minimum All Indicator Location w/Highest Annual Mean Control Locations
- of Nonroutine Sampled or Measured Total # of Detectable Locations (2)
Name Mean Mean Reported (Unit of Measurement) Measurements Activity Mean Distance &
Range (2)
Range (2)
Measurements (3)
Performed (MDA) (1)
Range Direction Air Cartridges 1-131(4) 7.OE-2 All less than MDA All less than MDA All less than MDA N/A (pCi/m )
363 Air Particulate Gross Alpha 2.OOE-3 1.09E-2 (301/310)
Visitor's Center 1.33E-2 (52/52) 1.30E-2 (49/52)
N/A (pCi/m )
362(4) 8.25E 5.55E-2 0.2 ml SW 1.00E 5.55E-2 1.12E 5.59E-2 Gross Beta 3.00E-3 2.89E-2 (309/310)
Visitor's Center 3.33E-2 (52/52) 3.O1E-2 (52/52)
N/A 362 (4 5.13E 8.79E-2 0.2 ml SW 7.74E 8.79E-2 1.09E 9.56E-2 Sr89 1.40E-3 3.73E-3 (3/72)
End of Con-7.43E-3 (1/12)
All less than MDA N/A 84 8.48E 7.43E-3 struction Road -
(single value)
West of Plant 0.2 mi W Sr90 9.OOE-4 5.99E-3 (1/72)
Visitor's Center 5.99E-3 (1/12) 5.93E-4 (1/12)
N/A 84 (single value) 0.2 ml SW (single value)
(single value)
TABLE 2-1 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM
SUMMARY
H. B. Robinson Steam Electric Plant Docket Numbers -
50-261 Darlington County, Sorth Carolina Calendar Year 1982 Medium or Pathway Type and Minimum All Indicator Location w/Highest Annual Mean Control Locations
- of Nonroutine Sampled or Measured Total # of Detectable Locations (2)
Name Mean Mean Reported (Unit of Measurement)
Measurements Activity Mean Distance &
Range (2)
Range (2)
Measurements (3)
Performed (MDA) (1)
Range Direction Air Particulate Gamma 3
(pCi/m )
84 Cs-137 6.OOE-3 5.46E-3 (2/72)
Visitors Center 7.02E-3 (1/12)
All less than MDA N/A 3.91E 7.02E-3 0.2 mi SW (single value)
Aquatic Vegetation Gross Beta 4.OOE+O 1.46E+1 (28/28)
Prestwood Lake 2.35E+1 (4/4) 6.42E+O (4/4)
N/A (pCI/gram) dry 32 1.29E+0 -
4.89E+1 4.9 ml ESE 1.04E+1 -
4.89E+1 2.59E+O -
1.25E+1 Sr-89 1.30E-1 2.02E-1 (5/28)
Bridge at N 3.23E-1 (1/4) 6.78E-1 (1/4)
N/A 32 4.32E 3.23E-1 End of Lake (single value)
(single value) 4.7 ml N Sr-90 6.1OE-2 9.97E-2 (7/28)
Discharge Canal 8.92E-2 (3/4) 8.64E-2 (2/4)
N/A 32 2.87E 2.02E-1 Outfall 6.54E 1.25E-1 8.55E-2 8.73E-2 3.8 mi N Gamma 36 Mn-54 6.50E-2 2.75E-1 (5/32)
Discharge Canal 5.28E-2 (2/4)
All less than MDA N/A 9.28E 9.15E-1 Outfall 2.42E 8.15E-1 3.8 mi N
TABLE 2-1 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM
SUMMARY
H. B. Robinson Steam Electric Plant Docket Numbers -
50-261 Darlington County, Sorth Carolina Calendar Year 1982 Medium or Pathway Type and Minimum All Indicator Location w/Highest Annual Mean Control Locations
- of Nonroutine Sampled or Measured Total # of Detectable Locations (2)
Name Mearf Mean Reported (Unit of Measurement) Measurements Activity Mean Distance &
Range (2)
Range (2)
Measurements (3)
Performed (MDA) (1)
Range Direction Aquatic Vegetation Gamma (pCI/gram) dry 36 Co-58 6.00E-2 6.80E-1 (9/32)
Discharge Canal 1.29E+O (2/4)
All less than MDA N/A 1.85E 2.13E+O Outfall 4.44E 2.13E+O 3.8 mi N Co-60 6.50E-2 8.79E-1 (11/32)
Discharge Canal 2.12E+O (3/4)
All less than MDA N/A 5.82E 5.37E+O Outfall 4.87E 5.37E+O 3.8 ml N Nb-95 6.OOE-2 1.68E-1 (1/32)
Bridge at N 1.68E-1 (1/4)
All less than MDA N/A (single value)
End of Lake (single value) 4.7 ml N Cs-134 6.50E-2 3.64E-1 (3/32)
Ditch Behind 3.64E-1 (3/12)
All less than MDA N/A 2.59E 4.25E-I Visitors Center 2.59E 4.25E-1 0.1 ml SW
TABLE 2-1 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM
SUMMARY
H. B. Robinson Steam Electric Plant Docket Numbers -
50-261 Darlington County, Sorth Carolina Calendar Year 1982 Medium or Pathway Type and Minimum All Indicator Location w/Highest Annual Mean Control Locations
- of Nonroutine Sampled or Measured Total # of Detectable Locations (2)
Name Mean Mean Reported (Unit of Measurement) Measurements Activity Mean Distance &
Range (2)
Range (2)
Measurements (3)
Performed (MDA)
(1)
Range Direction Aquatic Vegetation Gamma (pCi/gram) dry 36 Cs-137 7.OOE-2 1.03E+O (28/32)
Ditch Behind 1.86E+O (12/12) 4.97E-1 (4/4)
N/A 1.16E 4.83E+O Visitors Center 1.47E 4.83E+O 1.90E 6.89E-1 0.1 mi SW Ce-144 2.65E-1 7.33E-1 (4/32)
Bridge at N 7.70E-01 (1/4)
All less than MDA N/A 6.83E 7.70E-1 End of Lake (single value) 4.7 mi N Bottom Sediment Gross Beta 1.10E-1 1.29E+O (29/32)
Ditch Behind 2.45E+O (12/12) 3.43E-1 (4/4)
N/A
. (pCi/gram) dry 36 1.06E 4,44E+O Visitors Center 6.27E 4.44E+O 7.02E 8.84E-1 0.1 ml SW Sr-89 5.OOE-1 1.OOE-1 (1/32)
Plant Intake 1.OOE-1 (1/4)
All less than MDA N/A 36 (single value) 0.1 ml E (single value)
Sr-90 5.00E-1 2.75E-1 (5/32)
Ditch Behind 2.82E-1 (3/12)
All less than MDA N/A 36 9.78E 4.31E-1 Visitors Center 1.93E 3.60E-1 0.1 mi SW
TABLE 2-1 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM
SUMMARY
H. B. Robinson Steam Electric Plant Docket Numbers -
50-261 Darlington County, Sorth Carolina Calendar Year 1982 Medium or Pathway Type and Minimum All Indicator Location w/Highest Annual Mean Control Locations
- of Nonroutine Sampled or Measured Total # of Detectable Locations (2)
Name Mean Mean Reported (Unit of Measurement) Measurements Activity Mean Distance &
Range (2)
Range (2)
Measurements (3)
Performed (MDA) (1)
Range Direction Bottom Sediment Gamma (pCi/gram) dry 36 K-40 2.30E-1 5.86E+O (26/32)
Ditch Behind 1.05E+1 (12/12) 4.14E-1 (4/4)
N/A 2.05E 2.12E+1 Visitors Center 8.52E 2.12E+1 2.76E 6.23E-1 0.1 mi SW Co-60 3.OOE-2 3.04E+O (19/32)
Ditch Behind 4.56E+O (12/12)
All less than MDA N/A 1.46E 1.18E+1 Visitors Center 7.66E 1.18E+1 0.1 ml SW Cs-137 2.80E-2 5.22E-1 (21/32)
Ditch Behind 6.67E-1 (12/12).
1.60E-1 (2/4)
N/A 3.23E 1.94E+O Visitors Center 5.55E 1.94E+O 2.67E 2.94E-1 0.1 ml SW Ce-141 4.30E-2 2.23E-1 (1/32)
Black Creek 2.23E-1 (1/4)
All less than MDA N/A (single value) at Road 1623 (single value) 0.6 ml ESE
TABLE 2-1 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM
SUMMARY
H. B. Robinson Steam Electric Plant Docket Numbers -
50-261 Darlington County, Sorth Carolina Calendar Year 1982 Medium or Pathway Type and Minimum All Indicator Location w/Highest Annual Mean Control Locations
- of Nonroutine Sampled or Measured Total # of Detectable Locations (2)
Name Mean Mean Reported (Unit of Measurement) Measurements Activity Mean Distance &
Range (2)
Range (2)
Measurements (3)
Performed (MDA) (1)
Range Direction Fish Bone Sr-89 2.OOE+O 1.51E+O (2/3)
Site varies within 1.51E+O (2/3)
No Control N/A (pCi/gram) dry 3(5) 9.03E 2.IIE+O Lake Robinson 9.03E 2.11E+0 (Bottom Feeders)
Sr-90 2.OOE+O 7.19E+O (3/3)
Site varies within 7.19E+O No Control N/A 3 (5) 8.16E 9.88E+O Lake Robinson 8.16E 9.88E+O Fish Bone Sr-89 2.OOE+O 1.46E+O (3/4)
Site varies within 1.46E+O (3/4)
No Control N/A (pCi/gram) dry 4
1.49E 3.66E+O Lake Robinson 1.49E 3.66E+O (Free Swimmers)
Sr-90 2.OOE+O 6.27E+O (2/4)
Site varies within 6.27E+O (2/4)
No Control N/A 4
5.53E+O -
7.O1E+O Lake Robinson 5.53E+O -
7.O1E+0 Fish Flesh Gross Beta 4.OOE+O 1.37E+1 (3/3)
Site varies within 1.37E+1 (3/3)
No Control N/A (pCi/gram) dry 3(5) 1.28E+1 -
9.70E+O Lake Robinson 1.28E+1 -
9.70E+0 (Bottom Feeders)
(Free Swimmers)
Gross Beta 4.OOE+O 1.36E+1 (4/4)
Site varies within 1.36E+1 (4/4)
No Control N/A 4
1.17E+1 -
1.61E+1 Lake Robinson 1.17E+1 -
1.61E+1
TABLE 2-1 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM
SUMMARY
H. B. Robinson Steam Electric Plant Docket Numbers -
50-261 Darlington County, Sorth Carolina Calendar Year 1982 Medium or Pathway Type and Minimum All Indicator Location w/Highest Annual Mean Control Locations
- of Nonroutine Sampled or Measured Total #.of Detectable Locations (2)
Name Mean Mean Reported (Unit of Measurement) Measurements Activity Mean Distance &
Range (2)
Range (2)
Measurements (3)
Performed (MDA) (1)
Range Direction Fish Flesh Sr-89 2.OOE-1 6.IOE-1 (1/3)
Site varies within 6.10E-1 (1/3)
No Control N/A (pCi/gram) dry 3(5)
(single value)
Lake Robinson (single value)
Bottom Feeders Sr-90 1.00E-1 4.60E-1 (3/3)
Site varies within 4.60E-1 (3/3)
No Control N/A 3(5) 2.33E 6.32E-1 Lake Robinson 2.33E-1
- 6.32E-1 00 Free Swimmers Sr-89 2.OOE-1 5.38E-1 (1/4)
Site varies within 5.38E-1 (1/4)
No Control N/A 4
(single value)
Lake Robinson (single value)
Sr-90 1.OOE-1 1.84E-1 (3/4)
Site varies within 1.84E-1 (3/4)
No Control N/A 4
8.04E 2.81E-1 Lake Robinson 8.04E 2.81E-1 (Bottom Feeders)
Gamma 3(5)
K-40 3.0OE-1 8.OIE+O (3/3)
Site varies within 8.OIE+O (3/3)
No Control N/A 6.92E+O -
9.12E+O Lake Robinson 6.92E+O -
9.12E+O
TABLE 2-1 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM
SUMMARY
H. B. Robinson Steam Electric Plant Docket Numbers -
50-261 Dariington County, Sorth Carolina Calendar Year 1982 Medium or Pathway Type and Minimum All Indicator Location w/Highest Annual Mean Control Locations
- of Nonroutine Sampled or Measured Total # of Detectable Locations (2)
Name Mean Mean Reported (Unit of Measurement) Measurements Activity Mean Distance &
Range (2)
Range (2)
Measurements (3)
Performed (MDA) (1)
Range Direction Fish Flesh Gamma (pCi/gram) dry 3(5)
(Bottom Feeders)
Cs-137 7.OE-2 5.75E-1 (3/3)
Site varies within 5.75E-1 (3/3)
No Control N/A 3.21E-8.29E-1 Lake Robinson 3.21E 8.29E-1 Free Swimmers Gamma 4
K-40 3.OOE-1 6.51E+O (4/4)
Site varies within 6.51E+O (4/4)
No Control N/A 7.34E 9.83E+O Lake Robinson 7.34E 9.83E+O Cs-137 7.OOE-2 6.98E-1 (4/4)
Site varies within 6.98E-1 (4/4)
No Control N/A 9.86E 1.30E+O Lake Robinson 9.86E 1.30E+O Gamma Fodder and Feed 4
(pCi/gram) dry Cs-137 7.OOE-2 2.65E-1 (3/4)
Lyndale's Farm 2.98E-1 (2/2)
No Control N/A 1.98E 3.52E-1 11.3 mi SSW 2.45E 3.52E-1 Gamma Food Crop(6) 6 (pCi/gram) dry Cs-137 7.OOE-2 3.52E-1 (3/6)
Howle's Farm 4.60E-1 (2/2)
No Control N/A 1.36E 5.36E-1 5.0 ml ESE 3.84E 5.36E-1
TABLE 2-1 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM
SUMMARY
H. B. Robinson Steam Electric Plant Docket Numbers -
50-261 Darlington County, Sorth Carolina Calendar Year 1982 Medium or Pathway Type and Minimum All Indicator Location w/Highest Annual Mean Control Locations
- of Nonroutine Sampled or Measured Total # of Detectable Locations (2)
Name Mean Mean Reported (Unit of Measurement) Measurements Activity Mean Distance &
Range (2)
Range (2)
Measurements (3)
Performed (MDA) (1)
Range Direction Groundwater Gross Alpha 2.OE-1 9.74E-1 (8/12)
Well at West 1.03E+O (2/4)
No Control N/A (pCI/liter) 12 6.57E 140E+O Side -
Unit 2 6.57E 1.40E+O 0.1 mi SW Gross Beta 8.20E-1 9.44E-1 (9/12)
Unit I Well Near 1.06E+O (4/4)
No Control N/A 12 4.56E 2.03E+O Site Entrance 5.73E 2.03E+0 0.1 ml SSE Sr-89 5.OOE+O All less than MDA All less than MDA No Control N/A 12 Sr-90 1.20E+O All less than MDA All less than MDA No Control N/A 12 Tritium 3.50E+2 2.11E+2 (2/12)
Hartsville 3.17E+2 (1/4)
No Control N/A 12 1.60E+2 -
3.17E+2 5.8 ml ESE (single value)
TABLE 2-1 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM
SUMMARY
H. B. Robinson Steam Electric Plant Docket Numbers -
50-261 Darlington County, Sorth Carolina Calendar Year 1982 Medium or Pathway Type and Minimum All Indicator Location w/Highest Annual Mean Control Locations
- of Nonroutine Sampled or Measured Total P of Detectable Locations (2)
Name Mean Mean Reported (Unit of Measurement) Measurements Activity Mean Distance &
Range (2)
Range (2)
Measurements (3)
Performed (MDA) (1)
Range Direction Gamma Groundwater 12 (pCi/liter)
Cs-137 8.OOE+O 7.35E+O (2/12)
Well at West 7.51E+O (1/4)
No Control N/A 7.19E+0 -
7.51E+O Side of Unit 2 (single value) 0.1 mi SW Milk 1-131 1,50E-1 6.91E-1 (3/24)
Lyndale's Farm 6.91E-1 (3/12)
No Control N/A (pCI/liter) 24 4.90E 9.60E-1 11.3 ml SSW 4.90E 9.60E-1 Sr-89 3.OOE+O 3.65E+O (4/24)
Lyndale's Farm 3.97E+O (2/12)
No Control N/A 24 1.97E+O -
4.70E+O 11.3 mil SSW 3,79E+O -
4.16E+O Sr-90 2.OOE+O 2.37E+O (8/24)
Fink's Farm 2.48E+O (4/12)
No Control N/A 24 1.38E+O -
3.76E+O 7.0 ml SE 1.38E+O -
3.76E+O Gamma 24 K-40 3.OOE+2 9.OOE+2 (24/24)
Fink's Farm 1.08E+3 (12/12)
No Control N/A I.20E+2 -
1.46E+3 7.0 ml SE 1.20E+2 -
1.46E+3
TABLE 2-1 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM
SUMMARY
H. B. Robinson Steam Electric Plant Docket Numbers -
50-261 Darlington County, Sorth Carolina Calendar Year 1982 Medium or Pathway Type and Minimum All indicator Location w/Highest Annual Mean Control Locations
- of Nonroutine Sampled or Measured Total # of Detectable Locations (2)
Name Mean Mean Reported (Unit of Measurement) Measurements Activity Mean Distance &
Range (2)
Range (2)
Measurements (3)
Performed (MDA) (1)
Range Direction Gamma Milk 24 (pCi/liter)
Cs-137 9.0OE+O 7.55E+0 (5/24)
Fink's Farm 7.56E+O (2/12)
No Control N/A 4.47E+O -
1.03E+1 7.0 mi SE 6.50E+O -
8.63E+O Soil Gross Beta 9.OOE-2 5.06E-1 (6/6)
Hartsville 1.48E+O No Control N/A (pCi/gram) dry 6
9.88E 1.48E+O 5.8 mi ESE (single value)
Sr-89 2.70E-1 AlI less than MDA AlI less than MDA No Control N/A 4
Sr-90 1.30E-1 3.68E-1 (1/4)
Black Creek 3.68E-1 (1/1)
No Control N/A 4
(single value) at US I (single value) 5.1 mi ESE Gamma 8
K-40 2.30E-1 1.34E+O (6/8)
Ash Pond 3.27E+O (2/2)
No Control N/A 1.26E 4.47E+O
.9 mi NNW 2.08E+O -
4.47E+O
TABLE 2-1 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM
SUMMARY
H. B. Robinson Steam Electric Plant Docket Numbers -
50-261 Darlington County, Sorth Carolina Calendar Year 1982 Medium or Pathway Type and Minimum All Indicator Location w/Highest Annual Mean Control Locations of Nonroutine Sampled or Measured Total # of Detectable Locations (2)
Name Mean Mean Reported (Unit of Measurement) Measurements Activity Mean Distance &
Range (2)
Range (2)
Measurements (3)
Performed (MDA) (1)
Range Direction Gamma Soil 8
(pCi/gram) dry Co-60 3.OOE-2 2.02E+O (2/8)
Ash Pond 2.02E+O (2/2)
No Control N/A 6.37E 3.40E+O 0.9 mi NNW 6.37E 3.40E+O Cs-137 2.80E-2 2.97E-1 (5/8)
Hartsville 7.70E-1 (1/1)
No Control N/A 8.83E 7.70E-1 5.8 mi ESE (single value)
Surface Water Gross Alpha 2.0OE-1 1.22E+O (117/221)
Prestwood Lake 1.33E+O (34/52) 1.1OE+0 (24/52)
N/A (pCi/liter) 273 (7 4.42E 3.66E+O 4.9 mi ESE 5.27E 3.66E+O 4.50E 2.37E+O (Sampled Weekly)
Gross Beta 8.20E-1 1.59E+O (193/221)
Black Creek 1.68E+O (55/65) 1.19E+O (42/52)
N/A (7) 273 5.42E 5.13E+O at Road 1623 7.93E 5.13E+O 4.93E 2.33E+O 0.6 ml ESE Tritium 3.50E+2 7.19E+2 (160/221)
Discharge Canal 7.81E+2 (40/52) 4.10E+2 (8/52)
N/A (7) 273 3.24E+2 -
2.58E+3 Outfall 3.51E+2 -
2.26E+3 3.31E+2 -
4.94E+2 3.8 mi N
TABLE. 2-1 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM
SUMMARY
H. B. Robinson Steam Electric Plant Docket Numbers -
50-261 Darlington County, Sorth Carolina Calendar Year 1982 Medium or Pathway Type and Minimum All Indicator Location w/Highest Annual Mean Control Locations
- of Nonroutine Sampled or Measured Total # of Detectable Locations (2)
Name Mean Mean Reported (Unit of Measurement) Measurements Activity Mean Distance &
Range (2)
Range (2)
Measurements (3)
Performed (MDA) (1)
Range Direction (Monthly Composite)
Gross Alpha 2.O0E-1 1.16E+O (29/48)
Prestwood Lake 1.21E+O (7/12) 1.01E+O (3/12)
N/A 60 4.69E 2.27E+O 4.9 ml ESE 5.74E 1.73E+O 6.39E 1.32E+O Gross Beta 8.20E-1 1.55E+O (47/48)
Plant Intake 1.67E+O (12/12) 1.31E+O (11/12)
N/A 60 6.59E 2.39E+O 0.1 ml E 6.49E-1 2.30E+0 5.35E 2.02E+O Sr-89 5.OOE+O 2.OE+O (1/48)
Plant Intake 2.OOE+O (1/12)
All less than MDA N/A 60 (single value) 0.1 ml E (single value)
Sr-90 1.20E+0 5.56E+O (3/48)
Black Creek 8.61E+O (1/12) 3.21E+O (1/12)
N/A 60 3.80E+O -
8.61E+O at Road 1623 (single value)
(single value) 0.6 mi ESE Surface Water Tritium 3.50E+2 6.54E+2 (43/48)
Discharge Canal 7.51E+2 (11/12) 3.69E+2 (2/12)
N/A (pCi/IIter) 60 4.31E+2 -
1.36E+3 Outfall 4.45E+2 -
1.36E+3 3.29E+2 -
4.10E+2 (Monthly Composite) 3.8 ml N
TABLE 2-1 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM
SUMMARY
H. B. Robinson Steam Electric Plant Docket Numbers -
50-261 Darlington County, Sorth Carolina Calendar Year 1982 Medium or Pathway Type and Minimum All Indicator Location w/Highest Annual Mean Control Locations
- of Nonroutine Sampled or Measured Total # of Detectable Locations (2)
Name Mean Mean Reported (Unit of Measurement) Measurements Activity Mean Distance &
Range (2)
Range (2)
Measurements (3)
Performed (MDA) (1)
Range Direction Gamma Surface Water 72 (pCi/liter)
Cs-137 9.OOE+0 5.29E+O (4/60)
Black Creek 5.84E+O (1/12)
All less than MDA N/A (Monthly Composite) 4.44E+O -
5.84E+0 at Road 1623 (single value) 0.6 mi ESE Surface Water Gross Alpha 2.OOE-1 8.70E-1 (13/16)
Prestwood Lake 1.OOE+O (4/4) 6.79E-1 (3/4)
N/A (pCI/Hlter) 20 3.16E 1.30E+0 4.9 ml ESE 8.06E 1.26E+0 3.09E 1.31E+O (Quarterly Composite)
Gross Beta 8.20E-1 1.67E+O (16/16)
Prestwood Lake 1.76E+O (4/4) 1.30E+O (4/4)
N/A 20 9.73E 2.30E+O 4.9 ml ESE 1.31E+O -
2.20E+O 9.40E 1.95E+O Tritium 3.50E+2 6.59E+2 (12/16)
Discharge Canal 8.24E+2 (3/4)
All less than MDA N/A 20 3.29E+2 -
1.06E+3 Outfall 6.80E+2 -
1.06E+3 3.8 ml N Gamma Surface Water 52 (pCi/liter)
Mn-54 8.OOE-3 3.77E-2 (8/52)
Plant Intake 3.77E-2 (8/52)
No Control N/A (Ion Exchange 1.57E 8.03E-2 0.1 mil E 1.57E 8.03E-2 Resin)
TABLE 2-1 ENVIRONMENTAL RADIOLOGICAL MONITORING PROGRAM
SUMMARY
H. B. Robinson Steam Electric 'lant Docket Numbers -
50-261 Darlington County, Sorth Carolina Calendar Year 1982 Medium or Pathway Type and Minimum All Indicator Location w/Highest Annual Mean Control Locations
- of Nonroutine Sampled or Measured Total # of Detectable Locations (2)
Name Mean Mean Reported (Unit of Measurement) Measurements Activity Mean Distance &
Range (2)
Range (2)
Measurements (3)
Performed (MDA) (1)
Range Direction Gamma Surface Water 52 (pCi/lter)
Co-58 9.OOE-3 1.01E-1 (32/52)
Plant Intake 1.01E-1 (32/52)
No Control N/A (ion Exchange 6.61E 2.50E-1 0.1 mi E 6.61E 2.50E-1 Resin)
Co-60 9.OOE-3 1.61E-1 (32/52)
Plant Intake 1.61E-1 (32/52)
No Control N/A 1.08E 4.36E-1 0.1 mi E 1.08E 4.36E-1 Cs-137 9.OOE-3 1.12E-1 (37/52)
Plant Intake 1.12E-1 (37/52)
No Control N/A 2.71E 4.07E-1 0.1 mi E 2.71E 4.07E-1 Surface Water Gamma N/A All less than MDA All less than MDA No Control N/A (pCi/liter) 52 (Glass Wool)
TLD TLD 3.0OE-1 1.91E+0 (249/249)
Robinson Unit 1 4.65E+O (12/12) 1.61E+O (12/12)
N/A (millirem per wk) 261(8) 6.00E 7.30E+O
.02 ml E 2.90E+O -
7.30E+O 1.10E+O -
2.40E+O
FOOTNOTES:
- 1. Calculated based on three standard deviations above background, using typical sample size in a given counting time.
Due to counting statistics and varying volumes, occasionally lower minimum detectable activities are achieved.
- 2. Mean and range are based on detectable measurements only.
The fractions of detectable measurements at specific locations are indicated in parentheses.
- 3. Measurements in excess, at the 99.5 percent confidence level of ten times the control station value or ten times the minimum detectable activity (MDA)--whichever is larger.
Present environmental technical specifica tions do not require such reports.
- 4. Air particulate and charcoal cartridges are collected weekly for a possi ble 364 samples. However, samples collected on January 18 and April 5 at Station 17 and Station 35 were unavailable due to burned-out compressor and to wind blowing air filter into creek.
- 5. Third quarter bottom feeder flesh and bone samples were lost in analysis.
- 6. Tobacco samples (cured and uncured) are considered to be food crops.
- 7. Surface water was sampled twice a week at Station 11 during the first quarter of 1982 as a result of not having a composite sample. There was a total of 273 samples collected during 1982 of which 26 samples were for the first quarter at Station 11, plus 39 samples for the remaining three quarters, plus 4 other stations times 52 weeks.
- 8. Three TLDs were reported as missing in the field:
Stations 11, 30, and 12 for the month of October, September, and June, respectively.
2-17
3.0 INTERPRETATION AND CONCLUSIONS 3.1 Air Samples Air samples collected during 1982 contained no unusual levels of radioactivity.
Gross alpha concentrations were measurable in 301 of 310 samples, averaging 1.09 E-2 pCi/m 3, compared to the control station average of 1.30 E-2 pCi/m 3.
Measurable gross beta concentrations were observed in 309 of 310 samples, averaging 2.89 E-2 pCi/m 3, compared to the control station average of 3.01 E-2 pCi/m 3.
These levels are consistent with preoperational data obtained for the H. B. Robinson Plant. Graphs of the individual air sampling station (gross beta activity) compared to control station gross beta activity are included as Figures 3-1 through 3-6 to demonstrate that all stations were comparable to the control station with no large deviation at any single location.
The monthly composite gamma and radiostrontium analyses for air particulate samples revealed only three radionuclides during 1982 as summarized in Table 3-1.
3-1
Table 3-1 Radionuclides Detected During 1982 in Monthly Composited Air Particulate Samples and Fractional Occurrence Month Location Radionuclides (pCi/m 3 )
February Florence (1/12)
Sr-89 2.90 E-3 March Microwave Tower (1/12)
Sr-89 8.48 E-4 May Visitors Center (1/12)
Sr-90 5.99 E-3 May Hartsville -
Control (1/12)
Sr-90 5.93 E-4 May End of Construction Road Sr-89 West of Plant (1/12) 7.43 E-3 October Visitors Center (1/12)
Cs-137 7.02 E-3 October Microwave Tower (1/12)
Cs-137 3.91 E-3 The concentrations and sporadic appearances of these radionuclides are consistent with ambient levels observed in recent years.
In
- general, these radionuclides do not indicate the Robinson Plant as their source since other shorter-lived fission products would likewise be detected in these samples.
3-2
CP&L ENVIRONMENTAL MONITORING SYSTEM Figure 3-1 GROSS BETA AIR PARTICULATE (PICOCURIES PER CUBIC METER)
STAR IS SAMPLE STATION ACTIVITY DIAMOND IS CONTROL STATION ACTIVITY PLANT=HBR POINT=02 ACTIVITY 0.0900 0.0600 0.0300 0.0000 0
2 2
2 2
2 1
1 1
00 3
1 9
6 3
1 8
6 3
0 8
5 3
1 J
J F
M A
M U
J A
S 0
N D
D A
A E
A P
A U
U U
E C
0 E
E N
N B
R R
Y N
L G
P T
V C
C 88 8
8 8
8 2
2 2
2 2
2 2
2 2
2 2
2 2
2 DATE
CP&L ENVIRONMENTAL MONITORING SYSTEM Figure 3-2 GROSS BETA AIR PARTICULATE (PICOCURIES PER CUBIC METER)
STAR IS SAMPLE STATION ACTIVITY DIAMOND IS CONTROL STAT!ON ACT1VITY PLANT=HBR POINT=09 ACTIVITY 0.0900 0.0600 0.0300 0
2 2
2 2
21 1
1 0
0 0
3 16 6
3 8
6 3
0 8
5 3
1 JF M
A M
UJ A
S 0
N D
D A
A E
A P
A U
U U
E C
0 E
E N
N B
R R
Y N
L G
P T
V C
C 8
8 8
8 8
88 88 8
8 8
2 2
2 2
2 2
2 2
2 2
2 2
2 2
DATE
CP&L ENVIRONMENTAL MONITORING SYSTEM Figure 3-3 GROSS BETA AIR PARTICULATE (PICOCURIES PER CUBIC METER)
STAR IS SAMPLE STATION ACTIVITY DIAMOND IS CONTROL STATION ACTIVITY PLANT=HBR POINT=17 ACTIVITY 0.0900 0.0600 Ln 0.0300 0.0000 j
11 "
I l
'I nI" 1
'I I
l" gi 0
2 2
2 2
2 1
1 1
1 0
0 0
3 1
9 6
6 3
1 8
6 3
0 8
5 3
1 J
J F
M A
M UJ A
S 0
N D
D A
A E
A P
A U
U U
E C
0 E
E N
N B
R R
Y N
L G
P T
V C
C 8
8 8
8 8
8 8
8 8
8 8 8 8
8 2
2 2
2 2
2 2
2 2
2 2
2 DATE
CP&L ENVIRONMENTAL MONITORING SYSTEM Figure 3-4 GROSS BETA AIR PARTICULATE (PICOCURIES PER CUBIC METER)
STAR IS SAMPLE STATION ACTIVITY DIAMOND IS CONTROL STATION ACTIVITY PLANT=HBR POINT=34 ACTIVITY 0 0900 0.0600 0.0300
.0 2 2
2 2
2 1
1 1
- 1.
0 3
1 9
6 6
3 1
8 6
3 0
8 5
3 1
J J
F M
A M
J J
A S
0 N
D D
A A
E A
P A
U U
U E
C E
E N
N B
R R
Y N
L G
P T
V C
C 8
8 8
8 8
8 8
8 8
888 8
2 2
2 2
2 2
2 2
2 2
2 2.2 DATE
CP&L ENVIRONMENTAL MONITORING SYSTEM Figure 3-5 GROSS BETA AIR PARTICULATE (PICOCURIES PER CUBIC METER)
STAR IS SAMPLE STATION ACTIVITY DIAMOND IS CONTROL STATION ACTIVITY PLANT=HBR POINT=35 ACTIVITY 0.0900 0.0600 0.0300 0.000_
0 2
2 2
2 2
1 1
1 1
0 0
0 3
9 6
6 3
1 8
6 3
0 8
5 3
1 J
J F
M A
M J
J A.
S 0
N D
D A
A E
A P
A U
U U
E C
0 E
E N
N B
R R
Y N
L G
P' T V
C C
8 8
8 8
8 8
8 8
8 8
8 8
8 2
2 2
2 2
2 2 2 2
22 2
2 2
DATE
CP&L ENVIRONMENTAL MONITORING SYSTEM Figure 3-6 GROSS BETA AIR PARICULATE (PICOCURIES PER CUBIC METER)
STAR IS SAMPLE STATION ACTIVITY DIAMOND IS CONTROL STATION ACTIVITY PLANT=HBR POINT=36 ACTIVITY 0.0900 0.0600 0.0300 0
.0 0
0 0
7 1.....
I.
P.
.1_
0 2
2 2
2 2
0 0 0
3 9
6 6
3 1
8 6
3 0
8 5
3 1
J F
M A
M J
J A
S 0
N D
D AA E
A P
A U
U U
E C
0 E
E N
N B
R R
Y N
L G
P T
V C
C 8
8 8
8 88 8
8 88 8
8 8
2 2
2 2
2 2
2 2
2 2
2 2
2 DATE
3.2 Aquatic Vegetation and Bottom Sediment Aquatic vegetation and bottom sediment samples are taken quarterly at five locations to monitor the expected effluent path from the Robinson Plant.
An additional bottom sediment sample is taken quarterly at the plant intake.
Monthly bottom sediment and aquatic vegetation samples are taken from the open ditch.(Station
- 33) near the Visitors Center in order to monitor any liquid effluent from those locations where only low-level activity concentrations are expected.
Gamma analyses revealed the continued presence of several radionuclides predominant in plant liquid effluent as well as fission products attributed to old debris from nuclear testing. These radionuclides are summarized in Table 3-2.
Table 3-2 Average Concentration (pCi/g dry) and Fractional Occurrences of Radionuclides in Bottom Sediment and Aquatic Vegetation BOTTOM SEDIMENT Annual Average Location with Highest Isotope (pCi/g dry)
Annual Mean Co-60 3.040 (19/32)
SD-33 Sr-89 0.100 (1/32)
SD-5 Sr-90 0.275 (5/32)
SD-33 Cs-137 0.522 (21/32)
SD-33 Ce-141 0.223 (1/32)
SD-11 3-9
Table 3-2 (Continued)
AQUATIC VEGETATION Annual Average Location with Highest Isotope (pCi/g dry)
Annual Mean Mn-54 0.275 (5/32)
AV-8 Co-58 0.680 (9/32)
AV-8 Co-60 0.879 (11/32)
AV-8 Sr-89 0.202 (5/28)
AV-21 Sr-90 0.099 (7/28)
AV-8 Nb-95 0.168 (1/32)
AV-21 Cs-134 0.364 (3/32)
AV-33 Cs-137 1.030 (28/32)
AV-33 Ce-144 0.733 (4/32)
AV-21 Most occurrences of activity observed were at Station 33. The activity at this location is lower than previous years and is within the confines of the plant.
It discharges just below the spillway where the general public has minimum access.
The samples collected at Station 11, located approximately 200 yards downstream from the discharge point of Station 33, showed no significant increases in comparison to previous data.
Bottom sediments and aquatic vegetation are not con sumed by man but are useful for documentation of trends in plant effluent.
Review of past data indicates that there is no continuous increase in the concentrations observed at any sampling locations.
3-10
3.3 Fish Fish samples are analyzed quarterly for radiostrontium and gamma-emitting radionuclides.
Strontium-89 was observed once in free swimmers during the fourth quarter of 1982 and once in bottom feeders during the first quarter of 1982 at the concentration of 0.538 pCi/g (dry) and 0.610 pCi/g (dry),
respectively.
The concomitant dose to man is insignificant
(<0.001 mrem/year).
The strontium-90 and cesium-137 continued to manifest itself in fish flesh as summarized in Table 3-3.
Table 3-3 Average Concentration of Radionuclides in Fish Flesh (pCi/gram dry)
Radionuclide Bottom Feeders Free Swimmers Sr-90 0.460 (3/3) 0.184 (3/4)
Cs-137 0.575 (3/3) 0.698 (4/4)
It is worthy of note that strontium-90 and cesium-137 concentrations are lower in comparison to previous years.
During the fourth quarter of 1982, a special study was performed to evaluate the strontium-90 and cesium-137 activity in fish samples.
Samples were collected from Lake Bee (9.0 miles NW) which is totally unaffected by nuclear operations of H. B. Robinson.
These special samples, as well as the usual quarterly Lake Robinson samples, were separated by species and analyzed for strontium-90 and cesium-137.
These results are compared in Table 3-4.
3-11
Table 3-4 Fish in Lake Bee Compared to Fish in H. B. Robinson Lake (pCi/kg wet)
Collection H. B. Robinson Date Species Radionuclide Lake Bee Lake 10/18/82 Chub Sucker Cs-137 133.0 290.0 Sr-90 344.0 227.0 10/18/82 Sun Fish Cs-137 116.0 311.0 Sr-90 732.0 150.0 10/18/82 Large Mouth Bass Cs-137 259.0 No Sample Sr-90 120.0 No Sample 10/18/82 Pickeral Cs-137 No Sample 336.0 Sr-90 No Sample 359.0 10/18/82 Yellow Bull Head Cs-137 346.0 231.0 Sr-90 49.1 80.8 11/10/82 Spotted Sucker Cs-137 No Sample 37.2 Sr-90 No Sample 117.0 3-12
Table 3 (Continued)
Fish in Lake Bee Compared to Fish in H. B. Robinson Lake (pCi/kg wet)
Collection H. B. Robinson Date Species Radionuclide Lake Bee Lake 11/10/82 Chub Sucker Cs-137
- 173.0 72.1 Sr-90
- 353.0 89.0 11/10/82 Sunfish Cs-137
- 184.0 No Sample Sr-90
- 504.0 No Sample 11/10/82 Pickeral Cs-137
- 394.0 309.0 Sr-90
- Collected on 12/01/82 3-13
A statistical t-test*
was.
performed on cesium-137 and strontium-90 data for bottom feeders and free swimmers to determine if fish from Lake Robinson exhibited significantly higher concentrations of these radionuclides than those observed in fish from Lake Bee.
At the 95 percent confidence level, no significant difference was determined to exist.
- This test performed as described by Section 3-3.2, Page 3-4, Experimental Statistics, Handbook 91, United States Department of Commhaerce, National Bureau of Standards, August 1, 1963.
3-1
3.4-Vegetation Cattle feed (FO) and locally grown food crops (FC) were sampled and analyzed for gamma-emitting radionuclides.
The only radionuclide detected was cesium-137 as summarized in Table 3-5.
The low-level cesium-137 activity detected is believed to be attributable to contamination of the Ge(Li) detectors at the time of analysis.
Table 3-5 Average Concentration (pCi/g dry) and Fractional Occurrences of Radionuclides in Cattle Feed and Food Crops Cattle Feed (FO)
Isotope Annual Avg. (pCi/g)
Fractional Occurrence Cs-137 0.265 3/4 Food Crop (FC)
Isotope Annual Avg. (pCi/g)
Fractional Occurrence Cs-137 0.352 3/6 3-15
3.5 Groundwater Quarterly groundwater samples for all three sampling stations showed no indication of plant-contributed radioactivity.
Gross alpha activity was observed in 8 of 12 samples averaging 9.74 E-1 pCi/l.
Gross beta activity was detected in 9 of 12 samples averaging 9.44 E-1 pCi/l.
This average is comparable to data obtained during preoperational surveillance.
Radio strontium analyses revealed no measurable activity.
Tritium was detected in 2 of 12 analyses at an average concentration of 211 pCi/l with high relative counting errors.
This average is considerably lower than the normal minimum detectable activity of 350 pCi/l.
Gamma analyses revealed cesium-137 activity at an average concentration of 7.35 pCi/l in 2 of 12 samples.
This is not possible since it is 7 times higher than the gross beta analysis.
Again, contamination is suspected.
Subsequent samples contained no detectable levels of cesium 137.
3.6 Milk samples Monthly milk samples were taken at two locations and analyzed for radioiodine, radiostrontium, and gamma-emitting radionuclides.
Radiochemical determination of 1-131 yielded measurable activity in 3 of 24 samples analyzed.
For the collection periods of 4/19/82, 5/10/82, and 9/13/82, iodine-131 activity concentrations were 0.49 pCi/l, 0.96 pCi/l, and 0.623 pCi/l, respectively.
The samples collected on 4/19/82 and 9/13/82 were counted by a low-beta counter.
These activities were at or below the required minimum detectable activity of 0.5 pCi/1 and appears to be statistical artifacts.
The sample collected on 5/10/82 was counted by a beta-gamma coincidence system.
This system was recalibrated using a new detector and standard 3-16
on 5/3/82.
It appears in retrospect that this sample was analyzed immediately following a
QC check and may be attributed to contamination of the detector.
Radiostrontium analyses of milk revealed Sr-89 in 4 of 24 samples averaging 3.65 pCi/l.
Strontium-90 was detected in 8 of 24 samples averaging 2.37 pCi/l.
These concentrations are in agreement with averages from previous years and do not indicate that the Robinson operation affects the milk pathway to man during 1982.
Gamma isotopic analyses detected Cs-137 in 5 of the 24 samples averaging 7.55 pCi/1.
These levels of Cs-137 in milk are representative of data obtained over the last several years and reflect the accumulation of debris from old and recent nuclear weapons testing.
3.7 Soil Samples Ten sampling locations are sampled every three years.
Two sample locations are sampled semiannually on a rotating basis.
During 1982, Station 2 (Visitors Center),
Station 9 (Microwave Tower),
Station 22 (Hartsville),
and Station 24 (Black Creek at U.S.
- 1) were sampled and analyzed for gross beta, strontium, and gamma emitters.
Station 49 (East Shore of Lake at Boat Launch) is sampled semiannually as shoreline sediment and is analyzed for gross beta and gamma emitters.
In addition, Station 50 (Ash Pond) was added to the sampling program in 1981.
This station is sampled semiannually and analyzed for gamma-emitting radionuclides. Station 50 is located within the site boundary and was added to the environmental program as a directive from the Company's Nuclear Safety and Research Department.
3-17
Gross beta activities were detected in 6 of 6 samples analyzed averaging 5.06 E-1 pCi/g.
This is in agreement with gross beta activities observed on the same sample type during preoperational surveillance.
Gamma analyses revealed cesium 137 in 5 of 8 samples analyzed.
All concentrations observed were comparable to previous data reported for the area.
Low levels of Co-60 and Cs-137 were detected at Station 50.
Since this is a new station, there is no previous data with which to compare the activities measured.
The results are comparable to those observed in bottom sediment sampled at Station 33 which is also located on site.
3.8 Surface Water Gross alpha and gross beta activities in weekly surface water samples were generally consistent with previous surveillance data.
Gross alpha concentrations were measurable in 117 of 221 samples. analyzed.
The average of 1.22 E+) pCi/l was comparable to the control station average of 1.10 E+0 pCi/l.
Measurable gross beta concentrations were reported in 193 of 221 samples averaging 1.59 E+0 pCi/l.
These gross beta activities are comparable to the average of 4.08 E+O pCi/l reported during preoperational surveillance. These activities were consistent at all stations, with no one station showing significant deviation as shown in Figures 3-7 through 3-10.
Monthly composites of the weekly samples showed measurable gross alpha and beta activities in 29 of 48 and 47 of 48 cases, respectively.
The average concentration for gross alpha and gross beta in these samples was 1.16 E+0 pCi/l and 1.55 E+O' pCi/l, respectively.
These compare favorably with the control station averages of 1.01 E+0 pCi/l and 1.31 E + 0 pCi/l for gross alpha and gross beta, respectively.
3-18
Quarterly composites of the monthly composites revealed measurable alpha and beta activities similiar to the monthly samples.
Gross alpha activity was detected in 13 of 16 samples, averaging 8.70 E-1 pCi/l compared to 6.79 E-1 pCi/l at the control station.
Measurable gross beta activity was observed in 16 of 16 samples averaging 1.67 E+0 pCi/l.
This is comparable to 1.30 E+0 pCi/l detected at the control location.
Tritium activity concentrations were determined in weekly
- samples, monthly composites, and quarterly composites.
The tritium measured in the composites was consistent with that reported in samples from which the composites were made.
All activities are comparable to previous data revealing no increase in activity.
The tritium data is summarized by station below:
Tritium Concentrations (pCi/1)
Weekly Samples SW-5 SW-8 SW-11 SW-32 Average 703 781 729 650 Range 337-1830 351-2260 324-2580 331-1590 Monthly Composite Average 652 751 598 614 Range 484-911 445-1360 431-794 431-1150 Quarterly Composite Average 632 824 636 497 Range 507-766 680-1060 435-803 329-665 3-19
Specific isotopic analyses of monthly surface water composites were accomplished through high resolution gamma spectrometry.
In 68 of 72 samples
- analyzed, no fission or activation products were measurable. The four exceptions are given below:
Cs-137 pCi/l September Composite SW-11 5.84
- 1.28 November Composite SW-05 5.26 1 1.24 SW-08 4.44 +/- 1.26 SW-50 5.64
- 1.53 The sporadic appearance of cesium-137 in several isolated cases does not clearly indicate the Robinson Plant as the source.
The activities observed are below the typical minimum detectable activity of 9.0 pCi/l with high relative counting errors.
Radiostrontium analyses of monthly composited surface water samples revealed a single incidence of Sr-89 activity at the concentration of 2.00 pCi/l during May at Station 5.
Strontium-90 activity was quantified in 3 of 60 analyses at an average concentration at Station 5 at a concentration of 5.56 pCi/l.
The sporadic appearance of strontium-90 in surface water does not clearly indicate the Robinson Plant as the source.
The measurement of very low levels of fission and activation products in lake water was also performed during the year.
Weekly samples on the order of several thousand liters were concentrated on mixed bed ion exchange resin (for ion collection) and glasswool (for suspended particulate collection).
Thus, the analytical sensitivity for gamma isotopic analyses was improved sufficiently to allow measurement of many fission and activation products.
The radionuclides measured by this method are listed in Table 3-6.
3-20
Table 3-6 Ion Exchange Resin (pCi/1)
Average High Low Radionuclide Occurrence (pci/1)
(pCi/1)
(pCi/1)
Mn-54 8/52 3.77 E-2 8.03 E-2 1.57 E-2 Co-58 32/52 1.01 E-1 2.50 E-1 6.61 E-3 Co-60 32/52 1.61 E-1 4.36 E-1 1.08 E-2 Cs-137 37/52 1.12 E-1 4.07 E-1 2.71 E-2 Comparison of radionuclide concentrations collected on the resin and glasswool indicates a much greater fraction of the radionuclides appear in ionic form rather than as suspended particulates.
3-21
CP&L ENVIRONMENTAL MONITORING SYSTEM Figure 3-7 GROSS BETA SURFACE WATER (PICOCURIES PER LITER)
STAR IS SAMPLE STATION ACTIVITY DIAMOND IS CONTROL STATION ACTIVITY PLANT=HBR POINT=05 ACTIVITY 6.0000 4.0000 2.0000 0.0000 0
22 2
2 2
1 1
1 1
0 0
0 3
1 9
6 6
3 1
8 6
3 0
8 5
3 1
J F
M A
M J -
A S
0 N
D D
A A
E A
P A
U U
U E
C 0
E E
N N
B R
R Y
N L
G P
T V
C C
8 8
8 8
8 8
8 8
8 8
8 8
8 22 2
2 2
2 2
2 2
2 2
2-2 2
DATE
CP&L ENVIRONMENTAL MONITORING SYSTEM Figure 3-8 GROSS BETA SURFACE WATER (PICOCURIES PER LITER)
STAR IS SAMPLE STATION ACTIVITY DIAMOND IS CONTROL STATION ACTIVITY PLANT=HBR POINT=08 ACTIVITY 6.0000 4.0000
- 2. 0000 0.00002 2
2 2
20 0
2 2
2 2
2 1'
1 1
1 0
0 0
-3 1
9 6
6 3
1 8
6 3
0 8
3
.1 J
J F
M A
M J
J A
S 0
N D
D A
A E
A P
A U
U U
E C
0 E
E N
N B
R R
Y N
L G
P T
V C
C 8
8 8
8 8
8 8
8 8
8 8
8 8
8 2
2 2
2 2
2 2
2 2
2 2
2 2
2 DATE
CP&L ENVIRONMENTAL MONITORING SYSTEM Figure 3-9 GROSS BETA SURFACE WATER (PICOCURIES PER LITER)
STAR IS SAMPLE STATION ACTIVITY DIAMOND IS CONTROL STATION ACTIVITY PLANT=HBR POINT= 1I ACTIVITY 6.0000 4.0000 2.0000 0.00002 2
2 2
2 1
1 1
1 0
0 0
2 2
2 2
- 2.
1 1
1 1
0 0
0 3
6 6
3 1
8 6
3 0
8 5
3 1
J
-j F
M A
M
-J J
0 N
D '
A A
E A'PA U
U E
C 0
E E
N N
B R
R Y
N G
P T
V C
C 8.8 8
8 8
8 8
8 8
8 8
8 2
2 2
2 2
2 2
2 2
2 2
2 2
DATE
CP&L ENVIRONMENTAL MONITORING SYSTEM Fgre 3-10 GROSS BETA SURFACE WATER (PICOCURIES PER LITER)
STAR IS SAMPLE STAT!ON ACTIVITY DIAMOND IS CONTROL STATION ACTIVY PLANT=HBR POINT=32 ACTIVITY 6.0000 4.0000 2.0000 0
2 2
2 2
2 1
1 1
1 0
0 0
3 9
6 6
3 1
8 6
3 0
8 5
3 1
J U
F M
A M
J J
A S
0 N
D D
A A
E A
P A
U U
U E
C E
E N
N B
R R
Y N
L G
P T
V C
C 88 8
8 8
8 8 88 8
8 2
2 2
2 2
2 2
2 2
2 2
2 2
DATE
3.9 Thermoluminescent Dosimetry Area Monitors The average dose rate from all indicator stations 1.91 mrem/wk which is comparable to the control station average of 1.61 mrem/wk..
The only significantly higher reading was observed at Station 7 (Robinson Unit 1).
This station has tradition ally exhibited higher readings and shows no significant change from previous years.
3.10 Summary In summary, the following statements can be made in regard to all radioactive effluents (air particulate, gaseous, and liquid) from the H. B. Robinson Steam Electric Plant:
- 1.
All detectable radioactivities have been below the levels set forth in the Code of Federal Regulations, Title 10, Part 20.
- 2. The radioactivity released from the H. B. Robinson Steam Electric Plant has not significantly increased the amount of radioactivity detected in the environs surrounding the plant.
- 3. The environmental analyses performed during 1982 demon strate that the H. B. Robinson Steam Electric Plant and the environment can exist in harmony and produce electri city safely while ensuring the safety of the general public.
3-26
4.0 MISSED SAMPLES AND ANALYSES 4.1 Air Particulate (Weekly)
Samples collected January 18,
- 1982, and April 5, 1982, at Station 17 and Station 35 were unavailable due to a burned out compressor and due to wind blowing air filter into creek, respectively.
4.2 Fish Third quarter bottom feeder flesh and bone samples were lost in analysis.
4.3 Environmental TLDs The following thermoluminescent dosimeter results were missing in 1982:
Month Sample Station Reason January 12 Badge Lost in Field September 30 Badge Lost in Field October 11 Badge Lost in Field 4-1