ML20214P501

Rept on Discharge Monitoring at Diablo Canyon Power Plant During Month of Aug 1986

ML20214P501
Person / Time
Site:	Diablo Canyon
Issue date:	08/31/1986
From:	PACIFIC GAS & ELECTRIC CO.
To:
Shared Package
ML20214P497	List: ML20214P494 ML20214P501
References
NUDOCS 8609230201
Download: ML20214P501 (20)

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PACIFIC GAS AND ELECTRIC COMPANY

' NUCLEAR PLANT OPERATIONS REPORT ON-DISCHARGE MONITORING AT DIABLO CANYON POWER PLANT DURING THE MONTH OF AUGUST 1986

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<c TABLE OF CONTENTS Page

' Overview..........................

1 Summary of Monitoring Progran 1

A - Monitoring of Plant Influent and Effluent B - Monitoring of Receiving Waters Appendix 1 - Influent and Effluent Monitoring for August 1986 -

Form Q-2 Appendix 2 - Sediment Analysis - August 15, 1986

. Appendix 3 - Surface Water Temperatures - August 1986 b

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OVERVIEW t

During the month of August, dischar paths 001 (main circulating pumps),ges were made from discharge 001-A, 001-8, 001-D, 001-E, 001-F, 001-G, 001-H, 001-J, 001-L, 002, 003, and 004 No discharges were made from discharge paths,001-C, 001-I, 001-K, nor 005-013.

Chemical, radiochemical, and toxicity' analyses were performed in accordance with chemi:a1 analysis procedures contained in the Diablo Canyon Power Plant, Units 1 and 2 Plant Manual, Volume 8, 4

by State approved laboratories, or by laboratories approved by the Regional Board staff.

"Two chlorination events during August required Regional Board staff notification. On August 16, 1986, one chlorine sample, for Circulating Water Pump (CWP) 1-2, exceeded the 200 ppb limit by 10 ppb. The average of the grab samples for the day is reported on the Q-2 form.

i Operations has been instructed to reduce chlorination to 80 percent of the previous values utilized. This ection further assists in staying within limits during chlorination.

On August 23,1986, the 1200 hours0.0139 days <br />0.333 hours <br />0.00198 weeks <br />4.566e-4 months <br /> chlorine sample for CWP 1-2 was not collected due to personnel error. The other-chlorination samples were within specification, and.it is believed no limits were exceeded. A letter has been sent to the L

appropriate personnel to affect the schedule of chlorination times, and instructions that the Chemistry General Fore: nan should be informed if that schedule is to be changed.

j On August 29 and 30, 1986, the Turbine Building Sump overfl. owed i

directly to Discharge 001 without. passing through the oily water separator (001-F). The sump pumos were out of service at this i

time due to maintenance activity. A temporary sump pump was not j

able to handle the flow and maintain the sump-level. On the L

August 29, approximately 75 gallons overflowed and sampling and

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analysis for nonfiltrable residue (NFR) and grease and' oil were i

performed. Results confirmed that the concentrations of NFR (20mg/1) and grease and oil (<3mg/1) remained below Discharge t

i 001-F daily maximum limits.

The August 30 overflow was of such snort duration that samples were not obtained. Visual inspection l

indicated no oil carryover.

I-On August 10, 1986, during the first heat treatment of the Unit 2.

saltwater cooling system, some heated saltwater entered the 1

Intake Cove. Both the Unit 1 and thit 2 Auxiliary Saltwater system ( ASW) were demusseled by cross-tying to the Unit 2 forebay I

which was at the demusseling temperature. The screenwash system (Discharge 003) was not demusseled during this operation. The i

duration of exposure at the elevated temperature, during heat treatment of Conduit 2-2, lasted 1.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> due to operational constraints which precluded attaining optimal treatment i

temperature, and to problems which arose with the traveling j

screens while the plant was at temperature. At no time did the i.

I.

daily average temperature difference between the intake and discharge exceed limits. PGandE is continuing to investigate demusseling strategies to minimize heat treatment discharges.

Due to biofouling, the seawater supply line to the Biology Laboratory.and Reverse Osmosis Unit was demusseled during demusseling of Conduit 2-2.

Seawater was routed from the 2-2 forebay, through.one of the paired laboratory supply lines, and back through the other paired line to a temporary flexible pipe which discharged to the 2-2 forebay. During this process, seawater at approximately 90 degrees F was released to the back of the Intake Cove through an aeration valve which was t

inadvertently left open.

Near the. end of the demusseling period, a small fissure in the flexible connector resulted in a discharge of seawater at approximately 95 degrees F to the Intake Cove adjacent to the east side of the intake structure. At the termination of demusseling, a rupture in the 8-inch supply line to the laboratory caused the discharge of several thousand gallons of ambient temperature seawater to the back of the Intake

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Cove.

The sites of the above mentioned discharges have been inspected for environmental effects. At no location were mortalities of marine organisms observed. No observable effects of the accidental discharges were seen at any location.

SUMMARY

OF MONITORING PROGRAM A.

Monitoring of Plant Influent and Effluent 1.

Results of monitoring of plant influent and effluent in August are reported on Form Q-2's found in Appendix 1.

2.

A static bioassay of Discharge 001 is performed quarterly in January, April, July, and October.

B.

Monitoring of Receiving Waters 1.

Ecological Studies at Diablo Canyon Ecological studies in accordance with the Thermal Effects Monitoring Program (Provision D.4) continue.

2.

Sediment Analysis Analysis sediment samples collected August 15, 1986, is presented in Appendix 2.

3.

Aerial Photography of Kelp Beds Aerial photography (infrared film type 2443) of kelp beds in the vicinity of Diablo Canyon is required in February, June, and 0/,tcber.

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4.

Surface Water Temperature Surface water temperatures are reported in Appendix 3.

5.

Stratified Water Temperatures Stratified water temperatures are measured in February, June, and October.

6.

pH and Dissolved Oxygen of Receiving Waters Monitoring of pH and dissolved oxygen in the receiving waters is seneduled in February, June, and October.

7.

Incident Light Measurements Incident light measurements are reported quarterly.in the reports submitted in January, April, July, and October.

8.

In situ Bioassay Results of the Mussel Watch program will be reported to the Board directly from the California Department of Fish and Game in their periodic report for this program.

i APPENDIX 1 Influent and Effluent Monitoring August 1986 i

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i 4 APPENDIX 2 Sediment Analysis - August 15, 1986

BROWN AND CALDWELL 2 ANALYTIC 4L LABORATORIES LOG NO: E86-08-343 Received: 18 AUG 86 Reported: 05 SEP 86 Mr. Charles White Pacific Cas & Electric Company 3400 Crow Canyon Road San Ramon, California 94583 Requisition: LO 814155 REPORT OF ANALYTICAL RESULTS Page 1 LOG NO SAMPLE DESCRIPTION, SOIL SAMPLES DATE SAMPLED __-_.-__--- -_= 08-343-1 DCN-A 14 AUG 86 08-343-2 DCN-B 14 AUG 86 08-343-3 DCN-C 14 AUG 86 08-343-4 FCS-A 14 AUG 86 08-343-5 DCS-B 14 AUG 86 PARtJETER 08-343-1 08-343-2 08-343-3 08-343-4 08-343-5 Moisture, Percent 31 31 24 30 29 Particle Size Clay, Percent 1.3 2.8 1.8 1.3 1.3 Sand, Percent 97.5 93.5 96.5 98.5 98.5 Silt, Percent 1.2 3.7 1.7 0.2 0.2 Arsenic, mg/kg 2.2 2.6 3.2 4.0 2.8 Cadmium, mg/kg (0.3 (0.3 (0.3 (0.3 (0.3 Chromium, mg/kg 8.8 10 7.9 11 12 Copper, mg/kg 4.9 5.8 5.8 8.0 7.0 Iriad, mg/kg 20 20 24 20 17 Mercury, mg/kg 0.04 0.03 0.03 0.03 0.04 Nickel, mg/kg 14 17 13 23 18 Silver, mg/kg (1.4 <1.4 (1.4 <1.4 (1.4 2inc, mg/kg 12 13 14 24 25 Nitric Acid Digestion, Date 08.22.86 08.22.86 08.22.86 08.22.86 08.22.86 Note: Results expressed as mg/kg dry weight 125S POAta SMEET EVERvmLE.C A 9460e 14'ti428 230C l

BROWN AND CALDWELL ANALYTICAL LABORATORIES LOG NO: E86-08-343 Received: 18 AUG 86 Reported: 05 SEP 86 Mr. Charles White Pacific Gas & Electric Company 3400 Crow Canyon Road San Ramon, California 94583 Requisition: LO 814155 REPORT OF ANALYTICAL RESULTS Page 2 LOG NO SAMPLE DESCRIPTION, SOIL SA . - _ - - - _ - --. -- _ _ _ - - _ -- -- _ _ - - -- -- _ - _ _ -- - MP LES DATE SAMPLED 08-343-6 DCS-C ___-----___ -_-___-_-_----__---------__---_--____-_____-_.-___-....-----__ 14 AUG 86 PARAMETER 08-343-6 ---____-_____-__-___-_-_______ -______-__ __=_ Moisture, Percent Particle Size 25 Clay, Percent Sand, Percent 1.3 Silt, Percent 98.7 Arsenic, mg/kg 0.1 Cadmium, mg/kq 2.4 Chromium, mg/kg 0.5 Copper, mg/kg 9.2 L ad, mg/kg 7.1 Mercury, mg/kg 16 Nickel, mg/kg 0.03 Silver, mg/kg 17 Zinc, mg/kg <l.4 Nitric Acid Digestion, Date 20 08.22.86 k D. A. McLean, Lbboratory Director 1255POWELL STREET f vfRYvut CA 94606 (415)428 2300

BROWN AND CALDWELL - 2 ANALYTICAL LABORATORIES LOG tJ0: E86-09-103 Received: 18 AUG 86 Reported: 08 SEP 86 Revised Report: 9/11/86 Pacific Gas & Electric Company Purchase Order: LO 814160 3400 Crow Canyon Road San Ramon, California 94583 REPORT OF ANALYTICAL RESULTS Page 1 LOG NO SAMPLE DESCRIPTION, SOIL SAMPLES DATE SAMPLED 09-103-1 PON-A 14 AUG 86 09-103-2 PON-B 14 AUG 86 09-103-3 P0tJ-C 14 AUG 86 09-103-4 POS-A 14 AUG 86 09-103-5 POS-B 14 AUG 86 PARAMETER 09-103-1 09-103-2 09-103-3 09-103-4 09-103-5 - - - = - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -. - - - - - - - - - - - - - - - Moisture, Percent 43 48 44 55 27 Particle Size Clay, Pecent 3.8 3.3 2.8 5.6 1.3 Sand, Percent 95.7 96.0 96.0 86.0 98.7 Silt, Percent 0.5 0.7 1.2 U.4 0.) Arsenic, mg/kg 2.1 1.5 1.4 2.2 2.2 Cadmium, mg/kg <0.3 (0.3 <0.3 (0.3 (0.3 Chromium, mg/kg 16 18 15 15 4.9 Copper, mg/kg 6.0 6.9 6.4 9.3 5.8 Lead, mg/kg 18 23 18 22 16 Mercury, ag/kg (0.02 0.02 0.02 0.07 0.03 Nickel, ag/kg 25 27 25 31 9.6 Silver, mg/kg (1.4 <1.4 <1.4 <1.4 (1.4 Zinc, mg/kg 19 18 18 76 30 Nitric Acid Digestion, Date 08.22.86 08.22.86 08.22.86 08.22.86 08.22.86 = - - _ = - - - - ---------- --- _ 1255 POWELL STREE T EVEnvV6LLE C A 94D8 (415 4282300 1

-+. BROWN AND CALDWELL - 2 ANALYTICAL LABORATORIES LOC NO: E86-09-103 Received: 18 AUG 86 Reported: 08 SEP 86 Mr. Charles White Pacific Gas & Electric Company Purchase Order: LO 814160 3400 Crow Canyon Road San Ramon, California 94583 REPORT OF ANALYTICAL RESULTS Page 2 LOG NO SAMPLE DESCRIPTION, SOIL SAMPLES DATE SAMPLED -= 09-103-6 POS-C 14 NJG 86 PARAMETER 09-103-6 Moisture, Percent 57 Particle Size Clay, Percent 3.8 Sand, Percent 91.2 Silt, Percent 5.0 Arsenic, mg/kg 2.3 Cadmium, mg/kg <0.3 Chromium, mg/kg 17 Copper, mg/kg 8.6 Lead, mg/kg 30 Mercury, mg/kg <0.02 Nickel, mg/kg 30 Silver, mg/kg (1.4 Zinc, mg/kg 35 Nitric Acid Digestion, Date 08.22.86

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mA.-Abu be Mr D. A. McLean, Laboratory tirector 1255 POWELL STREET EVE AmLLE C A 94508 (d'S'428 23X

.c t PONE o ea i 0 1500 f t. m s covt o 500m DCNo 'O - o cove oirei.o erwvon O C,b PACIFIC OCEAN p(TAKE 'E POS* \\ Diablo Canyon Power Plant NPDES Sediment Monitoring

} 6i e 2 I e APPENDIX 3 i Surface Water Temperatures 9 1 1

Diablo Canyon Power Plant Surface Water Temperature 2"F isotherms Survey Date: August 8,1986 6" Devd

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Time Period: 1315-1505 PDST ,/ J Ambient: 53.1*F

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,A Plant Conditions: Unit Discharge Cooling Water Fleactor ( Temperature ("F) Flow (cfs) Power (%) \\, "g / 1 69.4 2000 63 1 2 71.5 2000 100

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