05000361/LER-1982-124, Forwards LER 82-124/03L-0.Detailed Event Analysis Submitted

Forwards LER 82-124/03L-0.Detailed Event Analysis Submitted

ML20071P202
Person / Time
Site:	San Onofre
Issue date:	10/21/1982
From:	Ray H SOUTHERN CALIFORNIA EDISON CO.
To:	Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
Shared Package
ML20071P205	List: 05000361/LER-1982-124, Forwards LER 82-124/03L-0.Detailed Event Analysis Submitted
References
NUDOCS 8211020388
Download: ML20071P202 (2)

LER-2082-124, Forwards LER 82-124/03L-0.Detailed Event Analysis Submitted

Event date:
Report date:
3612082124R00 - NRC Website

text

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7 IlECEIVED liRC c r-Southern California Edison Company C;?- C S AN ONOFRE NUC LE AR GENER A TING S T A TION P .O. B O X 128 S AN C LEMENTE. C A LIFORNI A 926F2 ucr.o~-A~Ao.a October 21, 1982 " ' ' ' ' " " "

U. S. Nuclear Regulatory Commission Office of Inspection and Enforcement Region V 1450 Maria Lane, Suite 210 Walnut Creek, California 94596-5368 Attention: Mr. R. H. Engelken, Regional Administrator

Subject:

Docket No. 50-361 30-Day Report Licensee Event Report No.82-124 San Onofre Nuclear Generating Station, Unit 2

Reference:

Letters, H. B. Ray (SCE) to R.,H. Engelken (NRC),

dated October 8, 1982, September 24, 1982, August 27, 1982 and August 13, 1982.

The referenced letters transmitted 30-day written reports and Licensee Event Reports (LER's) for occurrences involving the Condensate Storage Tank T-121 low water level. As noted in those letters, violations of Technical Specification 3.7.1.3 continue to occur. A Technical Specification change request has been submitted to the NRC to alleviate this problem.

Pursuant to Section 6.9.1.13b of Appendix A, Technical Specifications to Operating License NPF-10, for San Onofre Unit 2, this submittal provides the required 30-day written report and copy of LER for an occurrence similar to those described in the referenced letter.

Limiting Condition for Operation (LCO) 3.7.1.3 requires that while in Modes 1-3, the Condensate Storage Tank T-121 must be operable with a contained volume of at least 144,000 gallons. The associated Action Statement requires that with the tank declared inoperable, it must be returned to operable status within four hours or be in at least het shutdown (Mode 4) within the following six hours. The Surveillance Requirement 4.7.1.3 requires verification of the contained water volume at least once each 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.

[0211020388 821021 PDR ADOCK 05000361 H-n 3 PDR ft2 d%8

Mr. R. H. Engelken October 21, 1982 On September 22, 1982, with the plant in Mode 2, while feeding the steam generators using the Auxiliary Feedwater Pumps, the water level in Tank T-121 fell below the allowable limit. This tank has its overflow set about 5,000 gallons above the Technical Specification limit of 144,000 gallons.

Thus, prompt operator action is required to prevent entering the LC0 Action Statement.

The cause and corrective action of these events were identified in the referenced letters and remain unchanged. It should be noted that modifications have been made to the level indications available to the operators to facilitate precise control.

The violations of Technical Specification 3.7.1.3 occurred numerous times and may continue to occur until the proposed Technical Specification change is approved, notwithstanding the very best efforts of the operators to maintain tank level within the 5,000 gallons deadband. Enclosed LER 82-124 addresses the occurrence on September 22, 1982.

If there are any questions, please contact me.

Sincerely, f

Enclosure:

LER 82-124 cc: A. E. Chaffee (USNRC Resident Inspector, San Onofre Unit 2)

U. S. Nuclear Regulatory Commission Office of Inspection and Enforcement -

U. S. Nuclear Regulatory Commission Office of Management Information & Program Control Insititue of Nuclear Power Operations (INPO) i

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