ML20035E902
| ML20035E902 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 04/12/1993 |
| From: | Marsh W SOUTHERN CALIFORNIA EDISON CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9304200044 | |
| Download: ML20035E902 (5) | |
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1 Southem Califomia Edison Company i
23 PARKER STREET tRVINE. CALWORNIA 92718 h
l WALT E R C. M ARSH April 12 -1993 mu xmc
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U. S. Nuclear Regulatory Commission j
Attention: Document Control Desk -
i Washington, D.C. 20555 i
Subject:
Docket No. 50-361 and 50-362 Report of NPDES permit. Violations
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San Onofre Nuclear Generating Station, Unit:; 2 and 3 j
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References:
Letter from H. W. Newton (SCE).to 'A. L. Coe (California ~
Regional' Water Quality Control Board, San Diego Region),
NPDES Monitoring Report Unit 2, March 2, 1993 j
Letter from H. W. Newton (SCE) to A. L. Coe (California Regional Water Quality Control Board, San Diego. Region)', NPDES' i
l Monitoring Report Unit 3, March 2, 1993
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l Section 3.2 of Appendix B to Facility License No. NPF-15 and~ NPF-10 for San-
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Onofre Nuclear Generating Station (SONGS),= Units 2 and 3, requires Southern l
California Edison to report violations of the National Pollutant Discharge.
Elimination System (NPDES). permit. This-is accomplished by submitting copies of the reports required by the NPDES permit to the NRC.
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l During January 1993 all sampled water sources were found to be within permit j
limits with the following exceptions. There was one instance in which two l
chemical limits were exceeded and one~ instance of a time limit being exceeded.
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Both violations occurred on January 23rd and stemmed from the same event i
involving the circulating water intake chlorination systems-for both Units 2 i
and 3.
These violations were reported ir. the-above referenced letters as required by the NPDES permit.
Per the above mentioned NRC reporting requirement, a copy of the two referenced reports are enclosed.
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If you have any questions, please contact me.
Sincerely, M6 I.-
Enclosures cc:
J. B. Martin', Regional Administrator, NRC Region V M. B. Fields, NRC Project Manager, San Onofre Units 2 and 3_
C. W. Caldwell, NRC Senior Resident Inspector, San Onofre Units 1, 2.& 3 '
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[/6 9304200044 930412 PDR ADOCK 05000361
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l March 2,1993 l
California Regional Water Quality Control Board San Diego Region l
9771 Clairemont Mesa Boulevard, Suite B i
l San Diego,' California 92124-1331 l
Attn: Mr. AJthur L. Coe 1
SUBJECT:
NPDES Monitoring Report San Onofre Nuclear Generating Station, Unit 3
Dear Mr. Coe:
The NPDES Discharge Monitoring Report (DMR) for San Onofre Unit 3 covering the month of January is submitted in accordance with the requirements of Order No.
85-13 (NPDES Permit No. CA0108181). A summany of the generating unit's status and significant analytical results is provided below.
The unit was in operation all month and all sampled water sources were found to be within permit limits with one exception. The measured total residual chlorine on the combined discharge on January 23 was 0.31 ppm. It was also determined that the reportable quantity value of 100 pounds of sodium hypochlorite was exceeded. An estimated amount of approximately 260 pounds of sodium hypochlorite was released.
All applicable regulatory agencies were notified. Because of inoperable equipment, Unit 3 was chlorinated with Unit 2 pumps.
During the cross chlorination, flow was mistakenly read from the Unit 2 flow meter.
Because some leakage existed past the Unit 2 block valves, the pump speed setting was increased to try and achieve the normal flow of 2 GPM, as indicated on the Unit 2 flow gauge. The flow to Unit 3 exceeded the normal flow rate and resulted in the violation.
1 Mr. Arthur L. Coe March 2,1993 Once the violation was discovered, the chlorine pump stroke was reduced and a subsequent sample taken 20 minutes later showed chlorine below permit limits.
Corrective actions were taken to restore the system to hormal configuration and schedule repairs. Administrative controls have also been put in place to prevent cross chlorination until the leaking block valves have been repaired. in addition, one of the Unit 3 chlorination pumps has been returned to service. It is believed that these actions will prevent reoccurrence of this problem in the future.
Pursuant to Order No. 85-13, Reporting Requirement 12, the following representative has prepare,d and is authorized to sign the reports required by this order: Robert K.
Heckler, Environmental Engineer.
I certify under penalty of law that I have personally examined and am familiar with the information submitted in the attached document, and based on my inquiry of those individuals immediately responsible for obtaining the information, I believe the submitted information is true, accurate, and complete. I am aware that there are j
significant penalties for submitting false information, including the possibility of fine and imprisonment.
Sincerely, H. /. NEWTON Manager, Site Support Services RKH:rkh\\U3JAN93.NPD Enclosure cc:
Environmental Protection Agency, Region IX bec:
R. M. Rosenblum H. W. Newton /M. J. Johnson - w/o enclosure R. V. D. Reid N. J. Mascolo - w/o enclosure G. E. Hammond - w/o enclosure G. Shelton (approval per E-mail)
R. Burton (approval per E-mail)
Z. Veress (approval per E-mail)
K. T. Herbinson CDM Files Environmental Protection Files
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2 March 2,1993 l
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California Regional Water Quality Control Board
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San Diego Region i
9771 Claire[nont Mesa Boulevard, Suite B l
San Diego, Califomia 92124-1331-l Attn: Mr. Arthur L.Coe j
SUBJECT:
NPDES Monitoring Report San Onofre Nuclear Generating Station, Unit 2
Dear Mr. Coe:
t The NPDES Discharge Monitoring Report (DMR) for San Onofre Unit 2 covering the l
month of January is submitted in accordance with the requirements of Order No.
85-11 (NPDES Permit No. CA0108073). A summary of the generating unit's status i
and significant analytical results is provided below.
j The unit was in operation all month and all sampled water sources were found to be l
within permit limits. However, on January 23 the two hour chlorination daily time limit l
was exceeded due to leakage past Unit 2 block valves while chlorinating Unit 3 using j
a Unit 2 pump. Earlier in the day, Unit 2 was chlorinated for an hour and was witbic permit limits. Later that same day, the system was cross connected with Unit 2.
chlorination pumps supplying Unit 3. This was because the Unit 3 pumps were '
l inoperable. Unit 3 was chlorinated for one hou'r and thirteen minutes. The leakage j
past the block valves resulted in Unit 2 being chlorinated for a total of two hours and-i thirteen minutes for the day..Since that time,'one of the Unit 3 chlorination pumps has-been repaired and returned to service. The leaking valves have been identified.
Administrative controls have also been put in place to prohibit chlorinating a Unit using j
the other Units pumps until the leaking valves have been repaired.
l Pursuant to Order No. 85-11, Reporting Requirement 12, the following representative has prepared and is authorized to sign the reports required by this orderi Robert K.
l Heckler, Environmental Engineer.
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Mr. Anhur L Coe March 2,1993 I certify under penalty of law that I have personally examined and am familiar with the information submitted in the attached cocument, and based on my inquiry of those individuals immediately responsible for obtaining the information, I believe the submitted information is true, accuru.te, and complete. I am aware that there are significant penalties for submitting false information, incfuding the possibility of fine and imprisonment.
Sincerely, C.
4 H. W. NEWTON Manager, Site Support Services
_RKH:rkh\\U2JAN93.NPD Enclosure cc:
Environmental Protection Agency, Region IX bcc:
R. M. Rosenblum H. W. Newton /M. J. Johnson - w/o enclosure h \\
R. V. D. Reid
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N. J. Mascolo - w/o enclosure lG.~E:Ha~mmorid';w/o enclosure
~'G75hedon (appro~v'aijei55 ail)
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R. Burton (approval per E-mail)
Z. Veress (approval per E-mail)
K. T. Herbinson CDM Files Environmental Protection Files %
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