ML20065H185

Forwards LERs 82-095/03L-0,82-097/03L-0,82-102/03L-0, 82-104/03L-0,82-106/03L-0,82-108/03L-0,82-109/03L-0, 82-110/03L-0 & 82-111/03L-0.Detailed Event Analysis Submitted

ML20065H185
Person / Time
Site:	San Onofre
Issue date:	09/24/1982
From:	Ray H SOUTHERN CALIFORNIA EDISON CO.
To:	Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
Shared Package
ML20065H188	List: ML20065H185
References
NUDOCS 8210050016
Download: ML20065H185 (2)

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Southern California Edison Company *y ,&5 S AN ONOFRE NUCLE AR GENER A TING S T A TION r P .O. B O X 128 ,

S AN C LEMENT E, C ALIFORNI A 92672 H. B. R AY m,,g,,

ST ATION M AN AGE R " " ' " ' "

September 24, 1982 U. S. Nuclear Regulatory Commission Of fice 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 Reports Licensee Event Reports Nos.82-095, 82-097,82-102, 82-104,82-106, 82-108,82-109, 82-110, and 82-111 San Onofre Nuclear Generating Station, Unit 2

Reference:

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

dated August 13, 1982 (Re: LER's82-044, 82-049,82-050, 82-051,82-053, 82-057,82-068 and 82-071),

and H.B. Ray (SCE) to R.H. Engelken (NRC), dated August 27, 1982 (Re: LER's82-074, 82-079,82-082, and 82-083)

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 Specifi-cation change has been submitted to NRC to alleviate this problem.

Pursuant to Section 6.9.1.13b of Appendix A, Technical Specifications to Operating License NPF-10, for San Onof re Unit 2, this submittal, therefore, provides the required 30-day written reports and copies of LER's for nine similar occurrences.

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 st-tus within four hours or be in at least hot 8210050016 820924 y 'ef PDR ADOCK 05000361 S

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. R. H. Engelken -

2- September 24, 1982 standby (Mode 3) within the next six hours and in hot shutdown (Mode 4) within the'fcilowing 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 />.

On August 25, 1982, with the plant in Mode 3, 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 Specficiation limit of 144,000 gallons. Thus, prompt operator action is required to prevent entering the LCO Action Statement.

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

This situation has no safety significance because the operating history at this point in plant startup precludes any significant decay heat.

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 ef forts of the operators to maintain tank level within the 5,000 gallons deadband. LER 82-095 addresses the cccurrence on August 25, 1982. LER's82-097, 82-102,82-104, 82-106,82-108, 82-109,82-110, and 82-111 address the same type of occurrences.

If there are any questions, please contact me.

Sincerely, k fllk}i t t

Enclosures:

LER's No: 82-095, -097, -102, -104, -106, -108, -109, -110, and -Ill cc: A. E. Chaffee (USNRC Rasident inspector, San Onofre Unit 2)

U. S. Nuclear Regulatory Commission Office of Inspection and Enforcement U. S. Nuclear Regulatory Commission Of fice of Management information and Program Control

! Institute of Nuclear Power Operations l 1

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