ML17285B350

Advises That Mods to Recirculation Pump Trip Sys Implemented During 1990 Spring Refueling Outage.Remaining ATWS Items to Be Resolved as Listed

ML17285B350
Person / Time
Site:	Columbia
Issue date:	06/22/1990
From:	Sorensen G WASHINGTON PUBLIC POWER SUPPLY SYSTEM
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
GO2-90-110, TAC-59158, NUDOCS 9006290042
Download: ML17285B350 (6)

Text

ACCELERATED DL TRJBUTION DEMONSTPWTION SYSTEM REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)

ACCESSION NBR:9006290042 DOC.DATE: 90/06/22 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:

Advises that mods to recirculation pump trip sys implemented during 1990 spring refueling oustage.

DISTRIBUTION CODE: A055D COPIES RECEIVED:LTR TITLE: OR/Licensing Submittal: Salem ATWS

'I ENCL f Events GL-83-28 SIZE:

NOTES RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL PD5 LA 1 0 PD5 PD 3 3 SAMWORTH,R 1 1 INTERNAL: ACRS 6 6 NRR/DEST/ESB 8D 1 1 NRR/DLPQ/LPEB10 1 0 NRR/DOEA/OGCB11 1 0 NRR/DST/SICB 7E 1 1 NRR/DST/SPLB 8D 1 0 bFN 1 0 OGC/HDS2 1 0 REG FIL 01 1 1 RES/DSIR/EIB 1 1 EXTERNAL: LPDR 1 1 NRC PDR 1 1 NSIC 1 1 NOTE TO ALL "RIDS" RECIPIENTS:

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

TOTAL NUMBER OF COPIES REQUIRED: LTTR 23 ENCL 17 pj"

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WASHINGTON PUBLIC POWER SUPPLY SYSTEM P.O. Box 96B ~ 3000 George Washington Way ~ Riclrland, Washington 99352 June 22, 1990 G02-90-110 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 ANTICIPATED TRANSIENTS WITHOUT SCRAM (ATWS)

DESIGN MODIFICATIONS (TAC No. 59158)

Reference:

1) Letter, G02-89-110, GC Sorensen (SS) to NRC, "Anticipated Transient Without Scram Implementation Schedule", dated June 16, 1989

2) Letter, G02-89-055, GC Sorensen (SS) to NRC, "Provisions for ATWS Recirculating Pump Trip,"

dated April 5, 1989

3) Letter, G02-89-231, GC Sorensen (SS) to NRC, "ATWS Resolution Schedule", dated December 28, 1989

4) Letter, G02-90-087, GC Sorensen (SS) to NRC, "Response to Generic Letter 89-21 Requesting Plant Status on Implementation of Unresolved Safety Issues Related to ATWS", dated May 1, 1990

5) Letter, RB Samworth (NRC) to GC Sorensen (SS), "ATWS Rule'0 CFR 50.62 Relating to ARI and RPT Systems", dated December 6, 1988 In Reference 1 the Supply System committed to make changes to the WNP-2 ATWS Recirculation Pump Trip (RPT) system as described in Reference 2. This letter is to inform the NRC that these modifications were implemented during our 1990 spring refueling outage. Specifically:

~ We now have the ability to test the logic and controls of the ATWS-RPT system up to, but not including, the final actuation device (i.e., not including the breaker trip coils) while at power.

PDR P 'DC 9006290042 900622 ADOCK 05000397

J

~ " ,)age Two "ANTICIPATED TRANSIENTS WITHOUT SCRAM (ATWS)

DESIGN MODIFICATIONS

~ The ATWS-RPT system has been modified to provide the RPT pump trip logic shown in the attachment to this letter. Changes from that proposed in Reference 2 are noted. These changes have no impact on the resolution of the concern raised by the NRC in Reference 5.

In Reference 4 we stated that no technical specification changes were required as a result of these changes.

Remaining ATWS items to be resolved for WNP-2 are:

~ A June 29, 1990 submittal to the NRC that addresses the environmental qualification of ATWS equipment as committed to in Reference 3.

~ Updating of FSAR Section 15.8 to include a new ATWS analysis. This will be included in the fall 1990 amendment to the FSAR.

Very truly yours, G. C. orensen, Manager Regul tory Programs AGH/bk Attachments cc: JB Hartin - NRC RV NS Reynolds - BCP8R RB Samworth - NRC DL Williams - BPA/399 NRC Site Inspector - 901A

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