ML17311A839

Advises NRC That MOVs within Scope of Program of Unit 2 Have Been Evaluated & Tested & Considered Operable Under All Design Basis Conditions & Normal Events

ML17311A839
Person / Time
Site:	Palo Verde
Issue date:	04/26/1995
From:	Stewart W ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
102-03332-WLS-S, 102-3332-WLS-S, GL-89-10, NUDOCS 9505030154
Download: ML17311A839 (6)

Text

if RIORITY1 ACCELERATED RIDS PROCESSING REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)

ACCESSION NBR:9505030154 DOC.DATE: 95/04/26 NOTARIZED: NO DOCKET FACXL:STN-50-529 Palo Verde Nuclear Station, Unit 2, Arizona Publi 05000529 AUTH.NAME AUTHOR AFFILIATION STEWART,W.L.

Arizona Public Service Co.

(formerly Arizona Nuclear Power RECIP.NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)

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SUBJECT:

Advises NRC that MOVs within scope of program of Unit 2 have R

been evaluated

& tested

& considered operable under all design basis conditions

& normal events.

I DISTRIBUTION CODE:

A064D COPIES RECEIVED:LTR 2 ENCL 4 SIZE:

Z TITLE: Response to Generic Ltr 89-10, "Safety-Related MOV Testing

& Surveill 0

NOTES:Standardized plant.

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NOTE To ALL"RIDS" RECIPIENTS:

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Arizona Public Service Company P.O. BOX 53999

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PHOENIX. ARIZONA85012-3999 WILLIAML. STEWART EXECUTIVEVICEPRESIDENT NUCLEAR 102-03332-WLS/SAB/TNW April 26, 1995 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Mail Station P1-37 Washington, DC 20555-0001

Subject:

Palo Verde Nuclear Generating Station (PVNGS)

Unit 2 Docket No. STN 60-529 Completion of Generic Letter No. 89-10, Safety-Related Motor Operated Valve Testing and Surveillance Generic Letter (GL) 89-10 requires licensees to advise the NRC in writing when the actions delineated in the first paragraph of item (i) of the GL have been completed.

Arizona Public Service Company (APS) has completed these actions for Unit 2 at PVNGS. The motor-operated valves (MOV'S) within the scope of the program for Unit 2 have been evaluated and tested and are considered operable under all design basis conditions and normal events.

Although development and implementation of the MOV program have been completed, actions remain to be taken to address additional MOV issues.

These actions include:

1)

Pressure Locking/Thermal Binding The evaluation of the potential for pressure locking and thermal binding of safety-related gate valves is ongoing.

A proposed GL on this issue was published for comment in the Federal Register on March 27, 1995.

A review of this proposed GL is in progress.

2)

Periodic Verification Although periodic verification requirements have been incorporated in the MOV program, an evaluation of the need to perform periodic dynamic testing is ongoing.

This evaluation will include a review of the MOV test program completed by the 9505030154

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U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Completion of GL 89-10, Safety-Related MOVTesting and Surveillance Page 2 Electric Power Research Institute (EPRI) and the test data from the three PVNGS Units.

3)

Valve Mispositioning The PVNGS MOVprogram currently incorporates elements of valve mispositioning in the program.

It is understood that Supplement 7 of GL 89-10 will address valve mispositioning and willbe issued in the near future.

The NRC conducted inspections of the MOV program on July 8-26,'991, (50-528/529/530/91-25), October 18-22, 1993, (50-528/529/530/93-32),

and April4-8, and 20,

1994, (50-528/529/530/94-11).

In the April 1994 inspection, the NRC inspectors concluded that the APS MOV program was generally capable of demonstrating the operability of MOVs subject to GL 89-10 and that the program was thorough and was being implemented in a manner consistent with the APS commitments to the GL.

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

WLS/SAB/TNW/rv cc:

K. E. Perkins L. J. Callan B. E. Holian K. E. Johnston

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