ML17286B180

Responds to Generic Ltr 91-11 Re Resolution of Generic Issues 48, LCOs for Class 1E Vital Instrument Buses & 49, Interlocks & LCOs for Class 1E Tie Breakers.

ML17286B180
Person / Time
Site:	Columbia
Issue date:	12/05/1991
From:	Sorensen G WASHINGTON PUBLIC POWER SUPPLY SYSTEM
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
REF-GTECI-048, REF-GTECI-049, REF-GTECI-NI, TASK-048, TASK-049, TASK-48, TASK-49, TASK-OR GL-91-11, GO2-91-222, NUDOCS 9112100323
Download: ML17286B180 (6)

Text

ACCEI!ERATED DEMONSTRATION SYSTEM

+v DILUTION REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)

ACCESSION NBR: 9112100323 DOC. DATE: 91/12/05 NOTARIZED: NO DOCKET FACIL:50-397 WPPSS Nuclear Project, Unit 2, Washington Public Powe 05000397 AUTH. NAME AUTHOR AFFILIATION SORENSEN,G.C. Washington Public Power Supply System RECIP.NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)

SUBJECT:

Responds to generic ltr 91-1l,re resolution of generic issues 48,"LCO's for Class lE Vital Instrument Buses," 6 49, Interlocks 6 LCO's for Class 1E Tie Breakers." D DISTRIBUTION CODE: AOOID TITLE: OR COPIES RECEIVED:LTR Submittal: General Distribution

/ ENCL

$ SIZE:

NOTES:

RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL PD5 LA 1 1 PD5 PD 1 1 D ENG,P.L. 2 2 D

INTERNAL ACRS 6 6 NRR/DET/ECMB 7D 1 1 NRR/DET/ESGB 1 1 NRR/DOEA/OTSB11 1 1 NRR/DST 8E2 1 1 NRR/DST/SELB 7E 1 1 NRR/DST/SICB8H7 1 1 NRR/DST/SRXB 8E 1 1 NUDOCS-ABSTRACT 1 1 - &/-BP 1 0 OGC/HDS1 1 0 REG FILE 01 1 1 RES/DSIR/EIB 1 1 EXTERNAL: NRC PDR 1 1 NSIC 1 1 D

D D

NOTE TO ALL "RIDS" RECIPIENTS:

PLEASE HELP US TO REDUCE WASTE! CONTACT THE DOCUMENT CONTROL DESK, ROOiVI P 1-37 (EXT. 20079) TO ELIMINATEYOUR NAME FROM DISTRIBUTION LISTS FOR DOCUMENTS YOU DON'T NEED!

TOTAL NUMBER OF COPIES REQUIRED: LTTR 24 ENCL 22

J k 5 f

ti WASHINGTON PUBLIC POWER SUPPLY SYSTEM P.O. Box 968 ~ 3000 George Washington Way ~ Richland, Washington 99352 December 5, 1991 G02-91-222 Docket No. 50-397 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D.C. 20555 Gentlemen:

Subject:

NUCLEAR PLANT NO. 2, OPERATING LICENSE NPF-21 RESPONSE TO GENERIC LETTER 91-11, RESOLUTION OF GENERIC ISSUES 48, "LCOs FOR CLASS lE VITAL INSTRUMENT BUSES," AND 49, "INTERLOCKS AND LCOs FOR CLASS lE TIE BREAKERS" PURSUANT TO 10 CFR 50.54(f)

Reference:

Generic Letter, 91-11, JG Partlow (NRR) to All Holders of Operating Licenses, same subject, dated July 18, 1991 The reference requested assurance that Licensees have procedures for control of time limitations and surveillance requirements for vital instrument buses, inverters or other power sources to vital instrument buses, and tie breakers between redundant Class lE buses. It further stated that implementation of the Standard Technical Specifications, such as those implemented on recently licensed plants, resolved the concerns addressed in the generic letter. WNP-2, as part of initial licensing, implemented the Standard Technical Specifications.

Specifically, Technical Specification Limiting Conditions for Operation 3.8.3. 1 and 3.8.3.2 "Onsite Power Distribution Operating" and "Shutdown" address these issues. Accordingly, the concerns of the generic letter were met for WNP-2 with implementation of the Standard Technical Specifications.

The Supply System has reviewed the concerns expressed in the generic letter, the related WNP-2 Technical Specifications and appropriate plant implementing procedures. Weekly breaker alignment checks verify the operability and availability of power supplies and direct the operator to compensatory actions and/or time limitations for off normal conditions. These surveillance procedures also measure the voltages at these buses and assure that they meet defined acceptance criteria. Further, during periods where temporary power from off normal sources such 's it is necessary to provide during an outage, plant procedures require completion of a 10CFR 50.59 review and, if required, a safety evaluation. Also WNP-2 has no tie breakers capable of cross connecting redundant Class lE buses.

p 9112i00323 911205 POR ADOCK 05000397 POR

Page Two RESPONSE TO GENERIC LETTER 91-11, RESOLUTION OF GENERIC ISSUES 48 AND 49 In summary, plant design, the implementation of Standard Technical Specifica-tions, and plant operating procedures resolve the concerns identified in the referenced generic letter.

Very truly yours, G. C. Sorensen, Hanager Regulatory Programs PLP/bk cc: JB Hartin - NRC RV NS Reynolds - Winston & Strawn PL Eng - NRC DL Williams - BPA/399 NRC Site Inspector - 901A

STATE OF WASHINGTON)

Subject:

Response to

) Generic Letter 91-11 COUNTY OF BENTON I. A. G. HOSLER, being duly sworn, subscribe to and say that I am the Manager, WNP-2 Licensing, for the WASHINGTON PUBLIC POWER SUPPLY SYSTEM, the applicant herein; that I have the full authority to execute this oath; that I have reviewed the foregoing; and that to the best of my knowledge, information, and belief the statements made in it are true.

DATE Q~a ~~ 4 ~~ 6, 1991 A. G. Hosier, Manager WNP-2 Licensing On this date personally appeared before me A. G. HOSLER, to me known to be the individual who executed the foregoing instrument, and acknowledged that he signed the same as his free act and deed for the uses and purposes herein mentioned.

GIVEN under my hand and seal this day of o ary Public in nd for the STATE OF WASHINGTON Residing at Kennewick Washin ton My Commission Expires A ril 28 1994

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