ML20028D927

Forwards LER 82-005/03L-0.Detailed Event Analysis Submitted

ML20028D927
Person / Time
Site:	San Onofre
Issue date:	01/04/1983
From:	Ray H SOUTHERN CALIFORNIA EDISON CO.
To:	Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
Shared Package
ML20028D928	List: ML20028D927 ML20028D948
References
NUDOCS 8301200093
Download: ML20028D927 (2)

Text

a U

Q Southern California Edison Company gE S AN ONOFRE NUCLE AR GENER A TING ST A TION P .O. B O X 128 S A N C LEMENT E. C A LIFORNI A 92672 H. B. R AY ,, ,, goy, nanON -aaaar a January 4,1983 <ri. ..,,,oo 4

g U.S. Nuclear Regulatory Commission c- TA Office of Inspection and Enforcement $1 ggj(

Region V 1450 Maria Lane, Suite 210 h -

Attention: Mr. R. H. Engelken, Regional Administrator o ,l, ha

Dear Sir:

Subject:

Docket No. 50-362 30-Day Report Licensee Event Report No.82-005 San Onofre Nuclear Generating Station, Unit 3 Pursuant to Section 6.9.1.13.b of Appendix A Technical Specification to Operating License NPF-15, this submittal provides the required 30-day written report and copy of Licensee Event Report (LER) for an occurrence involving Limiting Condition for Operation (LCO) 3.1.2.3 associated with Reactivity Control Systems. A completed copy of LER 82-005 is enclosed.

LC0 3.1.2.3 requires at least one charging pump or high pressure safety injection pump in the boron injection flow path to be operable and capable of being powered from an operable emergency power source during Modes 5 and 6.

On December 4,1982, at 2242, with Unit 3 in Mode 5, Train B Diesel Generator 3G003 was removed from service requiring entry into the Action Statement associated with LC0 3.1.2.3 since other boration paths were not available at the time because of various inoperable equipment.

Although the determination that the Action Statement was to be invoked was not made until 0545 on December 5,1982, the requirement of the Action Statement had been satisfied since no core alterations or positive reactivity changes were in progress at the time.

This occurrence was caused by failure to recognize the full impact of taking the Train B diesel out of service. Train B diesel generator was returned to service at 0600 on December 5,1982.

8301200093 830104 PDR ADOCK 05000362 S PDR BD 23-63

~

Mr. R. H. Engelken January 4,1983 As corrective action to prevent recurrence, responsible Operations personnel have reviewed the circumstances of this event and have been

directed to perform a more detailed review of the impact on plant operations of taking a diesel generator out of service. This will also be included in their monthly retraining session.

There was no impact on plant operation or the health and safety of plant personnel or the public associated with this event.

If there are any question regarding the above, please contact me.

Sincerely, HSg /n/%%

1 t

Enclosure:

LER 82-005 cc: A.E. Chaffee (USNRC Resident Inspector, San Onofre, Units 2 and 3)

R.J. Pate (USNRC Resident Inspector, San Onofre, Units 2 and 3)

U.S. Nuclear Regulatory' Commission Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Office of Management Information and Program Control (MIPC) i Institute of Nuclear Power Operations (INPO) l i

l l

1 l

, _ . . _ _ . - , ..._ , ,. _ = _