ML20217M432

Informs That Util Has Performed Actions Requested in GL 96-01, Testing of SR Logic Circuits, as Stated in 960418 Util Ltr to Nrc.Listed Review Methodology Was Used Since Songs,Units 2 & 3 Have Same Ts,Sps & Logic for GL 96-01

ML20217M432
Person / Time
Site:	San Onofre
Issue date:	08/20/1997
From:	Rainsberry J SOUTHERN CALIFORNIA EDISON CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
GL-96-01, GL-96-1, NUDOCS 9708220283
Download: ML20217M432 (3)

Text

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An HMSGN lYJLRN ATIONAL" Company August 20, 1997 U. S. Nuclear Regulatory _ Commission Attention: Document Control Desk Washington, D.C. 20555 Gentlemen:

Subject:

Docket Nos. 50-361 and 50-362 Response to Generic Letter 96-01: " Testing of Safety-Related Logic Circuits" San Onofre Nuclear Generating Station Units 2 and 3

References:

1. Generic Letter 96-01:

" Testing of Safety-Related Logic Circuits" issued on January 10, 1996.-

1

2. April 18,1996 letter from Walter C. Marsh (Edison) to Document Control Oesk.(NRC),

Subject:

Docket Nos. 50-361-and 50-362 Response to Generic Letter 96-01:

" Testing of Safety-Related Logic Circuits" San _0nofre Nuclear Generating Station Units 2 and 3

- This letter is to notify the NRC that Southern California Edison (Edison) has performed, prior.to startup from,the Unit 3 Cycle 9 refueling outage, the -

actions requested in NRC Generic Letter (GL) 96-01 for San Onofre Unit 3 as stated _in the April 18, 1996 Edison-letter to the NRCL (Reference 2). The Unit 3 surveillance test procedures have been reviewed and modified, as necessary, to ensure that the requirements of the Unit 3 Amendment No.J116 approved Technical Specifications (TS) are fulfilled.

Initial surveillance testing has been completed on Unit 3' to satisfy the recommendations of GL 96-01'.

Initial surveillance testing has been completed on Unit 2, through the use of

-interim' procedures, to satisfy the recommendations of-GL 96-01. As stated in Reference 2,,the review and modification of surveillance test procedures, as necessary, for ongoing surveillance testing to comply with the Unit 2 Amendment No.127 TS will be completed for Unit 2 prior to startup from the Unit 2 Cycle 10. refueling outage. The Unit 2 Cycle 10 refueling outage is currently scheduled to start in December 1998.

- San Onofre Nudear Generating Station

[OkO ' O i sC t, CA 92674-0128 -

714-368-7420 9708220283 9708207 PDR ADOCK 05000361 P

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t pocument Control Oesk The review of plant surveillance test procedures included a comparison to electrical schematic drawings and logic diagrams, as needed, for the reactor protection system, emergency diesel generator (EDG) load shedding and sequencing, and actuation logic for engineered safety features (ESF) systems.

Since San Onofre Units 2 and 3 have the same TS, surveillance procedures, and logic for the GL 96-01 affected systems, the following review methodology was used:

1. The affected systems and procedures for Unit 2 were reviewed.

Unit 3 documents were aviewed to verify that the logic was identical to Unit 2.

2. Where dual train redundancy occurs, one train (A) was reviewed.

The redundant train (B) documents were reviewed to verify that the logic was identical to the Train A.

3. " Third-of-a-kind" (or " swing") pump and valve logic wes reviewed for Unit 2.

4. All channels of reactor protective system and ESF actuation logic for both Unit 2 and Unit 3 were reviewed.

This review encompassed parallel logic, interlocks, bypasses, inhibit circuits, relay contacts, control switches, and any other relevant electrical components to ensure that TS mandated safety functions are adequately covered in surveillance procedures.

Please let me know if you have any additional questions.

Very truly yours, C

cc:

E. W. Merschoff, Regional Administrator, NRC Regio V

K. E. Perkins, Jr., Director, Walnut Creek Field Office, NRC Region IV J. A. Sloan, NRC Senior Resident Inspector, San Onefre Units 2 & 3 M. B. Fields, NRC Project Manager, San Onofre Units 2 and 3

o Document Control Desk 3-State-of California County of San Diego On D

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IND 7U/10 I7s personally appeared JULL L. - 4 ftv4Mrf l A

, personally known to me to be the person whose name is subscribed toJthe within instrument and acknowledged to me that he executed the same in his authorized capacity, and that by his signature on the instrument the person, or the entity upon behalf of which the person acted, executed the instrument.

WITNESS my hand and-official seal.

l-t smcHtz COMM. # 1033763 "SmucN

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