ML17300B335

Informs That Repairs to Plant EDG 2A Jacket Water Cooling sub-sys Were Completed & EDG Was Declared Operable on 990903 at Approx 21:45 Mst.Noed Was Not Necessary,Since 72 Hour Completion Time Was Met

ML17300B335
Person / Time
Site:	Palo Verde
Issue date:	09/08/1999
From:	Overbeck G ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
102-04343-GRO-S, NUDOCS 9909220010
Download: ML17300B335 (6)

Text

CATEGORY 1 REGULAT Y INFORMATION DISTRIBUTIO YSTEM I(RXDS)

ACCESSION NBR:9909220010 DOC.DATE: 99/09/08 NOTARIZED: NO FACIL:STN-50-529 Palo Verde Nuclear Station, Unit 2, Arizona Publi DOCKET 05000529 I

.'UTH.NzzME )a AUTHOR AFFILIATION OVERlhECK,G.R. Arizona Public Service Co. (formerly Arizona Nuclear Power RECIP.NAME RECIPIENT AFFILIATION Records Management Branch (Document Control Desk)

SUBJECT:

Informs that repairs to plant EDG 2A jacket water cooling sub-sys were completed 5 EDG was declared operable on 990903 at approx 21:45 MST.NOED was not necessary, since 72 hour8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> completion time was met.

DISTRIBUTION CODE: AOOID COPIES RECEIVED:LTR i ENCL L2 SIZE:

TITLE: OR Submittal: General Distribution NOTES:Standardized plant. 05000529 RECIPIENT COPIES ,

RECIPIENT COPIES 0 ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL JAMERSON,C FIELDS,M SC INTERNAL: ACRS 1 FILE CENTER 01 1 NRR/DSSA/SPLB 1 1 NRR/DSSA SRXB 1 1 NUDOCS-ABSTRACT 1 OGC/RP 1 0 EXTERNAL: NOAC NRC PDR D

0 II~M~ U NOTE TO ALL "RZDS" 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: LTTR 11 ENCL

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Gregg R. Overbeck Mail Station 7602 Palo Verde Nuclear Senior Vice President TEL (623) 393-5148 P.O. Box 52034 Generating Station Nuclear FAX (623) 393-6077 Phoenix, AZ 85072-2034 102-04343 GRO/SAB/DGM September 8, 1999 U. S. Nuclear Regulatory Commission ATl N: Document Control Desk Mail Station P1-37 Washington, DC 20555-0001

Reference:

1. APS Letter 102-04341-GRO/SAB/REB, Enforcement Discretion to Technical Specification Section 3.8.1, "AC Sources - Operating", dated September 3, 1999.

Subject:

Palo Verde Nuclear Generating Station (PVNGS)

Unit 2 Docket No. STN 50-529 Enforcement Discretion to Technical Specification Section 3.8.1, "AC Sources - Operating" On September 3, 1999, Arizona Public Service Company (APS) requested enforcement discretion to Technical Specification -Section 3.8.1, "AC Sources - Operating". The Nuclear Regulatory Commission granted a verbal notice of enforcement discretion at approximately 18:10 MST on September 3, 1999. The enforcement discretion allowed, on a one-time basis, extension of the Completion Time in Required Action BA of Technical Specification 3.8.1 from 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> to 108 hours0.00125 days <br />0.03 hours <br />1.785714e-4 weeks <br />4.1094e-5 months <br />. APS submitted a written follow-up (reference 1) on September 3, 1999.

The revised completion time was requested to allow repairs to be completed on Unit 2 emergency diesel generator 2A. The Unit 2 emergency diesel generator (EDG) 2A had developed a leak in the jacket water sub-system that was large enough to affect the operation of the EDG. The EDG had previously been removed from service on September 1, 1999 at 0447 MST to repair a problem with the 3R cylinder and was being run to perform testing when the leak developed. A review of the required work scope determined that it could take an additional 1.5 days to repair the EDG and return it to an operable status, This would have exceeded the 72-hour completion time in required PG action B.4 of Technical SpeciTication 3.8.1. Therefore, the Palo Verde Technical Specifications would require a plant shutdown prior to completing the repairs on EDG 2A.

99092200%0 990'IlQB PDR AGGCK 0500052'll' PDR

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~Enforcement Discretion to Technical Specification Section 3.8.1, "AC Sources - Operating" The repairs to the Unit 2 emergency diesel generator 2A jacket water cooling sub-system were completed, and the EDG declared OPERABLE on September 3, 1999 at approximately 21:45 MST. The action statement did not expire until September 4, 1999 at 04:47 MST, therefore, the 72 hour8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> completion time was met and the NOED was not necessary. Even though the enforcement discretion was not needed, at the time of the request APS could not predict the extent of repairs that would be necessary to correct the EDG jacket water leak. APS acknowledges and appreciates the effort expended to grant the discretion.

No commitments are being made to the NRC by this letter.

Should you have any questions, please contact Dan Marks at (623) 393-6492.

Sincerely, GRO/SAB/DGM/kg cc: E. W. Merschoff P. H. Harrell N. Kalyanam J. H. Moorman

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