ML17285B344

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Advises That Util Intends to Utilize R-value of 0.13% Delta K/K in Cycle 6 Implementing Procedures.Should R-value Change in Final Startup & Operations Rept,Changed Value Shall Be Used Instead
ML17285B344
Person / Time
Site: Columbia Energy Northwest icon.png
Issue date: 06/20/1990
From: Sorensen G
WASHINGTON PUBLIC POWER SUPPLY SYSTEM
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
GO2-90-108, NUDOCS 9006270005
Download: ML17285B344 (2)


Text

ACCELERATED DISTRIBUTION DEMONST$&TION SYSTEM REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)

ACCESSION NBR:9006270005 DOC.DATE: 90/06/20 NOTARIZED: NO DOCKET g 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 util intends to utilize R-value of .13% delta K/K in Cycle 6 implementing procedures.

DISTRIBUTION CODE: AOOID TITLE: OR Submittal: General Distribution COPIES RECEIVED:LTR Q ENCL 0 SIZE:

NOTES'ECIPIENT RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL PD5 LA PD5 PD SAMWORTH,R INTERNAL: ACRS NRR/DET/ECMB 9H NRR/DOEA/OTSB11 NRR/DST 8E2 NRR/DST/SELB 8D NRR/DST/SICB 7E c4<~~'OPIES NRR/DST/SRXB 8E OC/LFMB NUDOCS-ABSTRACT OGC/HDS2 LE 01 RES/DSIR/EIB EXTERNAL: LPDR NRC PDR NSIC gg NOTE TO ALL "RIDS" RECIPIENTS'LEASE HELP US TO REDUCE WASTE! CONTACT THE DOCUMENT CONTROL DESK, ROOM Pl-37 (EXT. 20079) TO ELIMINATEYOUR NAME FROM DISTRIBUTION LINIS FOR DOCUMENTS YOU DON'T NEEDI TOTAL NUMBER OF COPIES REQUIRED: LTTR ~Q g ENCL ~ (A

WASHINGTON PUBLIC POWER SUPPLY SYSTEM P.O. Box 968 ~ 3000 George Washington Way ~ Richland, Washington 99352 June 20, 1990 G02-90-108 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 WNP-2 CYCLE 6 SHUTDOWN MARGIN REACTIVITY DEFECT VALUE

Reference:

1) Letter G02-90-075, GC Sorensen (SS) to NRC, "Modification to the WNP-2 Cycle 6 Reload Submittal and Response to NRC Bulletin No. 90-02: Loss of Thermal Margin Caused by Channel Box Bow", dated April 13, 1990.
2) ANFWP-90-0069, Hay 29, 1990, YU Fresk (ANF) to Supply System, "WNP-2 Cycle 6 Interim Startup and Operations Report".

Attached to Reference 1) was the "WNP-2 Cycle 6 Reload Summary Report", Revision

1. On Page 25 of that report, Table 8. 1 contains a Reactivity Defect/R-Value of 0.21  % delta K/K. This value was based on an assumed Cycle 5 energy of 225 effective full power days (EFPD). The WNP-2 Cycle 6 Interim Startup and Operations Report (Reference 2) gives an R-value of 0. 13 % delta K/K. This value was calculated based on an actual Cycle 5 energy of 254 EFPD. This final R-value differs from the previously reported value of 0.21 % delta K/K because the actual end of Cycle 5 energy (254 EFPD)is greater than the projected end of Cycle 5 energy (225 EFPD) used in the bounding licensing analysis. At the present time, the Supply System intends to utilize the R-value of 0. 13 % delta K/K in its Cycle 6 implementing procedures. Should the R-value change in the "final" Startup and F'l Operations Report, that value shall be used instead.

Very truly yours, G. C. orensen, Manager Regulatory Programs CC: JB Hartin - NRC RV NS Reynolds - BCP&R RB Samworth - NRC DL Williams - BPA/399 NRC Site Inspector - 901A 9o062 70005 90062005000397 F DR ADD tlat