ML17312B403

Submits Final Response to GL 96-01, Testing of SR Logic Circuits. Requested Actions Have Been Completed

ML17312B403
Person / Time
Site:	Palo Verde
Issue date:	04/26/1997
From:	James M. Levine ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
102-03922-JML-S, 102-3922-JML-S, GL-96-01, GL-96-1, NUDOCS 9705050135
Download: ML17312B403 (7)

Text

CATEGORY 1 REUULATL~ iNFORMATION DISTRIBUTIONSTEM (RIDE) fl ACCESSION NBR:9705050135 DOC.DATE: 97/04/26 NOTARIZED: YES DOCKET g

FACIL:STN-50-528 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 05000S30 AUTH.NAME AUTHOR AFFILIATION LIVINE,J.M.

Arizona Public Service Co.

(formerly Arizona-Nuclear Power RECIP.NAME

'ECIPIENT AFFILIATION Document'Control Branch (Document Control Desk)

SUBJECT:

Submits final response to GL 96-01, "Testing of SR Logic Circuits." Requested actions have been completed.

DISTRIBUTION CODE:

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TITLE: GL 96-01 Response-Testing of Safety-Related Logic NOTES:STANDARDIZED PLANT Standardized plant.

Standardized plant.

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N NOTE TO ALL "RIDS" RECIPIENTS:

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 TOTAL NUMBER OF COPIES REQUIRED:

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Cnmmltmenr. Inmnmtlen. Energy.

Generic Letter 96-01 Pah Verde Nuciear Generating Station James M. Levine Senior Vice President Nuclear TEL (602)393-5300 FAX(602)3934077 Mail Station 7602 P.O. Box 52034 Phoenix, AZ 85072-2034 102-03922-JML/SAB/RMW April26, 1997 U. S. Nuclear Regulatory Commission ATIN: Document Control Desk Mail Station P1-37 Washington, DC 20555-0001

Subject:

Palo Verde Nuclear Generating Station (PVNGS)

Units 1, 2, and 3 Docket Nos. STN 50-528/529/530 Final Response to Generic Letter 96-01, "Testing of Safety-Related Logic Circuits".

Generic Letter 96-01, "Testing of Safety-Related Logic Circuits", requested that APS take two actions to address potential problems with logic testing of safety-related circuits. This letter is to inform you that APS has completed the requested actions.

APS completed the requested actions of this Generic Letter in February of 1997.

During this effort, two speciTic instances were identified in which existing surveillance test procedures did not fully test the logic circuits in accordance with the existing Technical Specification Surveillance Requirements.

The affected logic circuits were associated with the Plant Protection System (PPS). In the Reactor Protection System portion of the PPS the redundant shunt and undervoltage trip functions for the reactor trip circuit breakers were not adequately tested.

In addition, in the Nuclear Steam Supply 'System-

- Engineered Safety Features Actuation System portion of the PPS, testing of the Auxiliary Feedwater Actuation System lockout relays was inadequate.

Each unit immediately entered the 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> provision of Technical Specification 4.0.3 when each deficiency was identified.

Testing of the logic circuits was performed during this time frame to demonstrate the operability of these circuits.

Each circuit performed as designed.

AP has incorporated instructions into the appropriate surveillance testing procedures t

ensure that these circuits continue to be tested in accordance with the Technica SpeciTications.

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U. <. Nuclear Regularoty Commission ATTN: Document Control Desk Final Response to Generic Letter 96-01 Page 2 During this review several minor deficiencies, such as drawing inaccuracies, incomplete information in design basis documents and procedural inadequacies were identified in plant documents.

In addition, enhancements to existing surveillance testing procedures for other circuits, or portions thereof, were identified that will result in improved rigor and methodology for testing the logic circuits and increased plant reliability.

In these cases, the issues identified did not result in operability concerns for the affected circuits. APS is addressing these issues through our Condition Reporting/Disposition Request process.

Please contact Mr. Scott Bauer at (602) 393-5978 if you have any questions or comments.

Sincerely, JML/SAB/RMW/mah cc:

E. W. Merschoff K. E. Perkins J. W. Clifford K. E. Johnston

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STATE OF ARIZONA

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COUNTY OF MARICOPA )

I, J. M. Levine, represent that I am Senior Vice President - Nuclear, Arizona Public Service Company (APS), that the foregoing document has been signed by me on behalf of APS with full authority to do so, and that to the best of my knowledge and belief, the statements made therein are true and correct.

J. M. Levine Sworn To Before Me This DayOf, 1997.

Notary Public My Commission Expires

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