ML20054L587
| ML20054L587 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 06/15/1982 |
| From: | Ray H SOUTHERN CALIFORNIA EDISON CO. |
| To: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| References | |
| RO-82-017, RO-82-17, NUDOCS 8207080270 | |
| Download: ML20054L587 (1) | |
Text
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U.S. Nuclear Regulatory Commission 3
Office of Inspection and Enforcement Region V 1450 Maria Lane, Suite 210 Walnut Creek, CA 94596-5368 Attention: Mr. R. H. Engelken, Regional Administrator
Dear Sir:
Subject:
Docket No. 50-206 Written Confirmation of Prompt Notification Licensee Event Report No.82-017 San Onofre Nuclear Generating Station, Unit 1 In accordance with Appendix B Technical Specification 5.6.3.a~.(2), to Provisional Operating License DPR-13, this submittal confirms the June 15, 1982, prompt notification of a reportable occurrence involving an unplanned i
release from the South Waste Gas Decay Tank at San Onofre Nuclear Generating Station, Unit 1.
Verbal notification was made to L.F. Miller, San Onofre Unit 1, Resident Inspector, and G.P. Yuhas, Region V Radiation Specialist.
At 0001 hours1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> on June 13, 1982, during routine surveillance, the South i
Waste Gas Decay Tank was observed to be pressurized to 25 psi (g). When
~
i next observed at 0210 on June 14, 1982, the pressure had fallen to,lessi i
than 1 psi (g).
Immediate actions included placing the Center Waste Gar Decay Tank into service and sampling the South Waste Gas Decay Tank.
The sample composition was determined to be approximately 94% nitrogen, 4% hydrogen, and 2% oxygen.
Radionuclide analysis of the 1260 c.c.
sample showed an activity of 1.034 x 10-4 uC/cc. Based on our preliminary-calculations, for a tank of the size and pressure in question, this
corresponds to a maxhnum release of 9.88 x 10-4 Curies.
This is a small fraction of the annual allowable release limit established in the Technical Specification.
At this time, the cause of the leakage has not yetlbeen identified and the investigation is continuing. A determination of the cause of the occurrence and a description of corrective actions will be detailed in the follow-up 14-day report and LER No.82-017 due June 28, 1982.
If you should have any questions about this matter, please contact me.
Sincerely, NM
/fy/En B2070s0270 820615
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PDR ADOCK 05000206 S
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cc:
L.F. Miller (USNRC Resident Inspector, San Onofre, Unit 1)
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