ML20082E813

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RO 83-143:on 831111,w/units in Mode 1,Limiting Condition for Operation 3.0.3 Entered for Approx 12 Minutes as Result of Considering Emergency Chiller E336 Inoperable.Review Ongoing.Followup Rept Will Be Submitted by 831128
ML20082E813
Person / Time
Site: San Onofre, 05003628  Southern California Edison icon.png
Issue date: 11/14/1983
From: Haynes J
SOUTHERN CALIFORNIA EDISON CO.
To: Martin J
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
References
RO-83-143, NUDOCS 8311280328
Download: ML20082E813 (1)


Text

_.

Southern California Edison Company S AN ONOFRE.4UCLE AR GENER A TING ST ATION P.O. BO X 128 S AN CLEMENTE. C ALIFORNI A 92672 J. G. H AYN ES TELEPHONE November 14, 1983

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U. S. Nuclear Regulatory Commission s

Office of Inspection and Enforcement li!

Region.V

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2 1450 Maria Lane, suite 210 g

d Walnut Creek, California 94596-5368 g

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8!D Attention:

Mr.

J.'B.

Martin, Regional Administrator g

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Dear Sir:

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Subject:

Docket Nos. 50-361 and 50-362 Prompt Report Licensee Event Report No.83-143 (Docket No. 50-361)

San Onofre Nuclear Generating Station, Units 2 and 3 Pursuant to Section 6.9.1.12.b' of Appendix A,' Technical Specifications to Facility, Operating Licenses NPF-10 and NPF-15 for San Onofre Units 2 and 3, respectively, this submittal provides the written confirmation of'our~ November 12, 1983, notification to the..NRC of a reportable occurrence involving the onsite power distribution system.

On November 11, 1983, with Units 2 and 3 in Mode 1 at 100% and 80%

power, respectively, Limiting Condition for Operation 3.0.3 was entered for approximately-12.inutes beginning at 1430 as a result of considering Emergency Chiller E336 inoperable.

Subsequent

. review has identified the possibility that the chiller should not have been considered inoperable.

We are continuing our review of this matter and will keep you informed of the progress of our review.

If the event is confirmed to be reportable, a 14-Day Follow-Up Report and Licensee Event Report (LER) form will be submitted by November 28, 1983.

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

Sincere,1y, l'

i,

'v >,

4, cc:

A.

E. Chaffee (USNRC Resident Inspector, Units 1, 2 and 3)

J. P. Stewart (USNRC Resident Inspector, Units 2 and 3) 8311280328 831114

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gDRADOCK 05000361 i

PDR

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