ML17310B386

Forwards SER Approving Licensee Requesting Six Months Before Next SG Tube Insp Based on Insp Results

ML17310B386
Person / Time
Site:	Palo Verde
Issue date:	06/22/1994
From:	Brian Holian Office of Nuclear Reactor Regulation
To:	Stewart W ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
Shared Package
ML17310B387	List: ML17310B386 ML17310B388
References
TAC-M86178, NUDOCS 9406280086
Download: ML17310B386 (10)

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UNITED STATES NUCLEAR REGULATORY COMIVllSSION WASHINGTON, D.C. 20555-000I June 22, 1994 Docket Nos.

STN 50-528, STN 50-529 and STN 50-530 Mr. William L. Stewart Executive Vice President, Nuclear Arizona Public Service Company P. 0.

Box 53999

Phoenix, Arizona 85072-3999

SUBJECT:

PALO VERDE UNIT NO.

2 OPERATING INTERVAL, BASED ON STEAM GENERATOR EDDY CURRENT INSPECTION RESULTS PALO VERDE NUCLEAR GENERATING STATION, UNIT NO.

2 (TAC NO. M86178)

We have reviewed your letter of March 8,

1994, which provided your Steam Generator Inspection Report and your safety assessment of restart and continued operation of Palo Verde Unit 2.

A meeting was held with your staff on March 15, 1994, to discuss in detail the results of your most recent inspection.

Based on our review, discussed more fully in the enclosed Safety Evaluation, we have concluded that Unit 2 can safely operate for six months before the next steam generator tube inspection, as proposed.

The staff will review additional information, that you committed to provide during our meeting of March 15, 1994, prior to addressing a longer cycle length.

Regarding the other units, Unit 3 has recently completed a refueling outage that included steam generator chemical cleaning and eddy current testing.

Several free-span axial crack indications were identified following chemical cleaning of steam generator number 32.

Based on your inspection results, by letter of June 20,

1994, you proposed to operate Unit 3 for six effective full-power months, not to exceed six calendar months in Modes 1, 2, or 3 after startup.

Your eddy current inspection results for Unit 3 indicate that Unit 2 tube degradation is limiting; therefore, your proposal for a six-month cycle length on Unit 3 is bounded by the safety evaluations performed to date on Unit 2.

Unit 1 has been operating for approximately seven months, following its steam generator eddy current inspection conducted in November 1993.

Although no free-span axial crack indications have been identified in Unit 1 steam generators to date, the last inspection did identify tubesheet circumferential 9406280086 940622

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Hr. William L. Stewart 3une 22, 1994 cracking.

You plan on submitting additional information in support of your position that Unit 1 can operate for a full cycle length.

The staff will review the additional information and propose a meeting with APS representatives to discuss the appropriate cycle length for Unit l.

Sincerely, ORIGINAL SIGNED BY'ri an E. Hol i an, Seni or Project Manager Project Directorate IV-2 Division of Reactor Projects - III/IV Office of Nuclear Reactor Regulation

Enclosure:

Safety Evaluation cc w/enclosure:

See next page DISTRI v

Docket Fi1 e NRC

& Local PDRs MR EAdensam BHolian LTran

OGC, 15B18 ACRS (10),

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KPerkins, WCFO RJones EHurphy DFoster-Curseen JStrosnider

• See revious concurrence OFFICE DRPW LA

-5 'H PDIV-2 BC EMCB D/PDIV-2 NAME DFoster-Curseen

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Tguay 4 i'lle4 DATE OFFICIAL RECORD COPY

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Mr. William L. Stewart June 22, 1994 cracking.

You plan on submitting additional information in support of your position that Unit 1 can operate for a full cycle length.

The staff will review the additional information and propose a meeting with APS representatives to discuss the appropriate cycle length for Unit 1.

Sincerely, ORIGINAL SIGNED BY:

Brian E. Holian, Senior Project Manager Project Directorate IV-2 Division of Reactor Projects III/IV Office of Nuclear Reactor Regulation

Enclosure:

Safety Evaluation cc w/enclosure:

See next page DISTRIBUTION:

Docket File NRC

& Local PDRs JRoe EAdensam BHolian LTran

OGC, 15B18 ACRS (10),

P315 PDIV-2 r/f TQuay KKarwoski

KPerkins, WCFO RJones EMurphy DFoster-Curseen JStrosnider

• See revious concurrence OFFICE NAME DRPW/LA DFoster-Curseen PM PDIV-2 BC EMCB 0/PDIV-2 g(4 BHolian JStrosni'der*

TQuay

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/. -/94 DATE OFFICIAL RECORD COPY

/- -/94 4/ ~94 6/2/94 DOCUMENT NAME:PV2SGSE.694

Hr. William L. Stewart cracking.

You plan on submitting additional information in support of your position that Unit I can operate for a full cycle length.

The staff will review the additional information and propose a meeting with APS representatives to discuss the appropriate cycle length for Unit l.

Sincerely,

Enclosure:

Safety Evaluation cc w/enclosure:

See next page Brian E. Holian, Senior Project Manager Project Directorate IV-2 Division of Reactor Projects III/IV Office of Nuclear Reactor Regulation

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Mr. William L. Stewart Arizona Public Service Company Palo Verde CC:

Mr. Steve Olea Arizona Corporation Commission 1200 W. Washington Street

Phoenix, Arizona 85007 T.

E. Oubre, Esq.

Southern California Edison Company P. 0.

Box 800

Rosemead, California 91770 Senior Resident Inspector Palo Verde Nuclear Generating Station 5951 S. Wintersburg Road

Tonopah, Arizona 85354-7537 Regional Administrator, Region IV U.

S. Nuclear Regulatory Commission Harris Tower L Pavillion 611 Ryan Plaza Drive, Suite 400 Arlington, Texas 76011-8064 Mr. Charles B. Brinkman, Manager Washington Nuclear Operations ABB Combustion Engineering Nuclear Power 12300 Twinbrook Parkway, Suite 330 Rockville, Maryland 20852 Mr. Aubrey V. Godwin, Director Arizona Radiation Regulatory Agency 4814 South 40 Street

Phoenix, Arizona 85040 Jack R.

Newman, Esq.

Newman E Holtzinger, P.C.

1615 L Street, N.W., Suite 1000 Washington, D.C.

20036 Mr. Curtis Hoskins Executive Vice President and Chief Operating Officer Palo Verde Services 2025 N. 3rd Street, Suite 220

Phoenix, Arizona 85004 Roy P.

Lessey. Jr.,

Esq.

Akin, Gump, Strauss, Hauer and Feld El Paso Electric Company 1333 New Hampshire Avenue, Suite 400 Washington, DC.

20036 Ms. Angela K. Krainik, Manager Nuclear Licensing Arizona Public Service Company P. 0.

Box 52034

Phoenix, Arizona 85072-2034

Chairman, Maricopa County Board of Supervisors 111 South Third Avenue

Phoenix, Arizona 85003

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