ML17285A610

Safety Evaluation Supporting Amend 71 to License NPF-21

ML17285A610
Person / Time
Site:	Columbia
Issue date:	06/23/1989
From:	Knighton G Office of Nuclear Reactor Regulation
To:
Shared Package
ML17285A611	List: ML17285A610 ML17285A612
References
IEB-88-007, IEB-88-7, NUDOCS 8907130085
Download: ML17285A610 (6)

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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION SUPPORTING AMENDMENT N0.71 TO FACILITY OPERATING LICENSE NO.

NPF-21 WASHINGTON PUBLIC POWER SUPPLY SYSTEM NUCLEAR PROJECT NO.

2 DOCKET NO. 50-397

1.0 INTRODUCTION

In a letter from G. Sor ensen, Washington Public Power Supply System (WPPSS) to the NRC dated March 31, 1989 (Ref. 1),

WPPSS proposed Technical Specification (TS) changes for Nuclear Plant No.

2 (WNP 2).

The proposed changes would alter some of the boundaries of, and allowed or required operations within, regions of the power-flow map with potential for thermal hydraulic stability (THS) problems.

WPPSS further proposed to augment the surveillance of instability in the regions by using the Advanced Nuclear Fuels (ANF) ANNA Stability Monitoring System (ASMS).

There were several discussions between the NRC and WPPSS staff resulting in a June 1, 1989 letter from WPPSS (Ref. 2) providing details of ASMS hardware implementation and proposing several modifications in the previously submitted TS clarifying the intent and language of the specifications.

The June I letter did not alter the action noticed in the Federal Register on May 3, 1989 and did not affect the initial no significant hazards determination.

The proposed changes are to specifications 3/4.2.6, designating a region in which operation is prohibited, 3/4.2.7 providing for instability monitoring in a designated region during two (recirculation) loop operation (TLO), 3/4.2.8 (a

new specification) providing for instability monitoring in a designated region during single loop operation (SLO), and 3/4.4.1, designating (as the primary change) a region to be avoided in SLO.

(3/4.4.1 is the primary specification providing for actions to be taken on going to SLO.)

The proposed

regions, and operation within these

regions, are modifications of current WNP2 regions and are in general accord with the General Electric "Interim Recommendations for Stability Actions"

( IRSA) presented in NRC Bulletin 88-07, Supplement I (December 30, 1988).

The bulletin supplement requested that licensees implement the recommendations (along with additional actions relating to scram with recirculation pump trip and region boundary justification) by modifying relevant procedures.

Modification of TS was not requested since it is expected that long term solution implementation will begin within a year.

WPPSS has responded (Ref. 3) to the bulletin supplement and has indicated that the requested changes have been made to the procedures.

The proposed TS changes for WNP2 result in several differences from the IRSA in region boundaries or allowed operations.

These differences are either pgp

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UNITE0 STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION SUPPORTING AMENDMENT N0.7l TO FACILITY OPERATING LICENSE NO.

NPF-21 WASHINGTON PUBLIC POWER SUPPLY SYSTEM NUCLEAR PROJECT NO.

2 DOCKET NO. 50-397

1.0 INTRODUCTION

In a letter from G. Sorensen, Washington Public Power Supply System (WPPSS) to the NRC dated March 31, 1989 (Ref. 1),

WPPSS proposed Technical Specification (TS) changes for Nuclear Plant No.

2 (WNP 2).

The proposed changes would alter some of the boundaries of, and allowed or required operations within, regions of the power-flow map with potential for thermal hydraulic stability (THS) problems.

WPPSS further proposed to augment the surveillance of instability in the regions by using the Advanced Nuclear Fuels (ANF) ANNA Stability Monitoring System (ASMS).

There were several discussions between the NRC and WPPSS staff resulting in a June 1, 1989 letter from WPPSS (Ref. 2) providing details of ASMS hardware implementation and proposing several modifications in the previously submitted TS clarifying the intent and language of the specifications.

The June 1 letter did not alter the action noticed in the Federal Register on May 3, 1989 and did not affect the initial no significant hazards determination.

The proposed changes are to specifications 3/4.2.6, designating a region in which operation is prohibited, 3/4.2.7 providing for instability monitoring in a designated region during two (recirculation) loop operation (TLO), 3/4.2.8 (a

new specification) providing for instability monitoring in a designated region during single loop operation (SLO), and 3/4.4.1, designating (as the primary change) a region to be avoided in SLO.

(3/4.4.1 is the primary specification providing for actions to be taken on going to SLO.)

The proposed

regions, and operation within these

regions, are modifications of current WNP2 regions and are in general accord with the General Electric "Interim Recommendations for Stability Actions" ( IRSA) presented in NRC Bulletin 88-07, Supplement 1 (December 30, 1988).

The bulletin supplement requested that licensees implement the recommendations (along with additional actions relating to scram with recirculation pump trip and region boundary justification) by modifying relevant procedures.

Modification of TS was not requested since it is expected that; long term solution implementation will begin within a year.

WPPSS has responded (Ref. 3) to the bulletin supplement and has indicated that the requested changes have been made to the procedures.

The proposed TS changes for WNP2 result in several differences from the IRSA in region boundaries or allowed operations.

These differences are either I

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Accordingly, the license is amended by changes to the Technical Specifications as indicated in the attachment to this license amendment and paragraph 2.C.(2) of Facility Operating License No. NPF-21 is hereby amended to read as follows:

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Technical S ecifications and Environmental Protection Plan The Technical Specifications contained in Appendix A, as revised through Amendment No.

71, and the Environmental Protection Plan contained in Appendix 8, are hereby incorporated in the license.

The licensee shall operate the facility in accordance with the Technical Specifications and the Environmental Protection Plan.

3.

This amendment is effective as of the date of issuance.

FOR THE NUCLEAR REGULATORY COMMISSION George M. Knighton, Director

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Division of Reactor Projects - III, IV, V and Special Projects Office of Nuclear Reactor Regulation

Attachment:

Changes to the Technical Specifications Date of Issuance:

June 23, 1989

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