ML17312B347

Informs NRC That Proposed Amend to PVNGS TS Table 3.7-2 to Revise Maximum Allowable Steady State Power Levels & Variable Overpower Trip Setpoints When One or More Main Steam Safety Valves Are Inoperable Is No Longer Necessary

ML17312B347
Person / Time
Site:	Palo Verde
Issue date:	03/27/1997
From:	James M. Levine ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
102-03902-JML-A, 102-3902-JML-A, NUDOCS 9704020252
Download: ML17312B347 (6)

Text

CA,TEQORY 1-REGULATC INFORMATION DISTRIBUTION TEM (RIDS)

ACCESSION NBR:9704020252 DOC.DATE: 97/03/27 NOTARIZED: NO, DOCKET FACIL:SR~A'"~>-,528 Palo Verde Nuclear Station, Unit 1, Arizona Publi 05000528 STN-50-529 Palo Verde Nuclear Station, Unit 2, Arizona Publi 05000529 STN-50-530 Palo Verde Nuclear Station, Unit 3, Arizona Publi 05000530 AUTH. NAME AUTHOR AFFILIATION LEVINE,J.M. Arizona Public Service Co. (formerly Arizona Nuclear Power RECIP.NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)

SUBJECT:

Informs NRC that proposed amend to PVNGS TS Table 3.7-2 to C revise maximum allowable steady state power levels s variable overpower trip setpoints when one or more main A steam safety valves are inoperable is no longer necessary.

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

NOTES:STANDARDIZED PLANT 05000528 Standardized plant. 05000529 Standardized plant. 05000530 0 RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL PD4-2 LA PD4-2 PD CLIFFORD,J INTERNAL: ACRS FILE CE NRR/DE/ECGB/A 1 E EMCB NRR/DRCH/HICB 1 NRR/DSSA/SPLB NRR/DSSA/SRXB 1 NUDOCS-ABSTRACT D OGC/HDS2 1 0

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PLEASE HELP US TO REDUCE WASTE. TO HAVE YOUR NAME OR ORGANIZATION REMOVED FROM DISTRIBUTION LISTS OR REDUCE THE NUMBER OF COPIES RECEIVED BY YOU OR YOUR ORGANIZATION, CONTACT THE DOCUMENT CONTROL DESK (DCD) ON EXTENSION 415-2083 CO TOTAL NUMBER OF COPIES REQUIRED: LTTR 14 ENCL

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James M. Levine TEL (602)393-5300 Mail Station 7602 Palo Verde Nuclear Senior Vice President FAX (602)3934077 P.O. Box 52034 Generating Station Nuclear Phoenix, AZ 65072-2034 102-03902- JMLNKKI,GAM March 27, 1997 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Mail Station P1-37 Washington, DC 20555-0001

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References 1. Letter no. 102-03578 dated January 5, 1996, from W. L. Stewart, Executive Vice President - Nuclear, APS, to NRC, "Proposed Amendments to Facility Operating Licenses and to Technical SpeclTications and Various Bases, Related to Power Uprate."

2. Letter no. 102-03678 dated April 19, 1996, from W. L. Stewart, Executive Vice President - Nuclear, APS, to NRC, "Responses to Questions Related to Power Uprate Amendment Request."

Subject:

Palo Verde Nuclear Generating Station (PVNGS)

Units 1,2, and 3 Docket Nos. STN 50-528/529/530 Cancel Commitment to Revise the Technical Specification Limits Associated With Inoperable Main Steam Safety Valves This letter is to inform the Nuclear Regulatory Commission (NRC) that a proposed amendment to the PVNGS Technical Specifications (TS) Table 3.7-2 to revise the maximum allowable steady state power levels and variable overpower trip (VOPT) setpoints when one or more main steam safety valves (MSSVs) are inoperable is no longer necessary. In References 1 and 2, APS stated that analysis had been performed in response to NRC Information Notice 94-60, "Potential Overpressurization of Main Steam System." At that time, the analysis identified the need to revise the limits in TS Table 3.7-2 for reactor power and VOPT setpoints with inoperable MSSVs to ensure operation within the safety analysis at the power uprate (3876 Mwt) conditions. However, the changes to the VOPT setpoints were not included with the power uprate amendment request because in IN 94-60 the NRC Staff stated that it did not expect licensees to prepare TS changes while the Staff was considering the need for generic resolution of the issue. In Reference 2, APS indicated that proposed TS changes were planned to be submitted by the end of 1996.

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U.S. Nuclear Regulatory Commission Cancel Commitment to Revise the Technical Specification Limits Associated with Inoperable Main Steam Safety Valves Page 2 APS updated the inoperable MSSV analysis prior to the end of 1996 based on reduced core inlet temperatures associated with the PVNGS reactor coolant system temperature reduction and power uprate design changes. The updated analysis identified that the current limits in TS Table 3.7-2 for reactor power and VOPT setpoints with inoperable MSSVs would ensure operation within the safety analysis at the power uprate (3876 Mwt) conditions. Therefore, no TS changes will be submitted.

Should you have any questions, please contact Scott A. Bauer at (602) 393-5978.

Sincerely, JML/AKK/GAM/rlh CC: E. Merschoff K. E. Perkins J. W. Clifford K. E. Johnston

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