ML17305B008

Advises That Adequate Basis Not Provided for NRC to Conclude That Pressurizer Surge Line Meets All Appropriate Code Limits for 40-yr Plant Life,Per 890306 & 900413 Response to Bulletin 88-011

ML17305B008
Person / Time
Site:	Palo Verde
Issue date:	08/15/1990
From:	Peterson S Office of Nuclear Reactor Regulation
To:	Conway W ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
References
IEB-88-011, IEB-88-11, TAC-72152, TAC-72153, TAC-72154, NUDOCS 9008230188
Download: ML17305B008 (6)

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UNITEDSTATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 August 15, 1990 give.i~i Docket Nos. 50-528, 50-529 and 50-530 Mr. Milliam F.

Conway Executive Vice President Arizona Public Service Company Post Office Box 52034 Phoenix, Arizona 85072-2034

SUBJECT:

NRC BULLETIN NO. 88-11, "PRESSURIZER SURGE LINE THERMAL STRATIFICATION"'

EVALUATION OF COMBUSTION ENGINEERING OWNERS GROUP BOUNDING ANALYSIS (TAC NO. 72152,

72153, AND 72154)

By letters dated March 6, 1989 and April 13, 1990, Arizona Public Service Company (APS) responded to Item 1.b of NRC Bulletin No. 88-11, "Pressurizer Surge Line Thermal Stratification."

The letters stated that APS supported the bounding analysis performed by the Combustion Engineering Owners Group (GEOG) for which Palo Verde Nuclear Generating Station (PVNGS) Units 1, 2 and 3 are applicable.

The analysis indicated that the integrity of the pressurizer surge line (PSL) satisfies the ASME Section III Code criteria for the life of the plant, taking into account the effects of thermal stratification.

The staff has completed its review of the GEOG bounding analysis and finds that although sufficient information has been provided to justify continued plant operation until PVNGS completes its final report in accordance with the schedule delineated by the Bulletin, adequate bases have not been provided for the staff to conclude that the PSL meets all appropriate Code limits for 40-year plant life.

A copy of the evaluation which was sent to the GEOG is enclosed for your information.

Also enclosed is the staff's evaluation of CE's response to items discussed during a September, 1989 audit at CE's office.

APS may work collectively through the GEOG effort to address the issues identified in the evaluation, but APS is responsible to ensure that the Bulletin requested actions are fully implemented at PVNGS.

The staff will assess the conformance of the PSL to applicable Codes and 9008230188 90081='DR ADOCK 05000528 PDC

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Mr. William F.

Conway August 15, 1990 regulatory requirements for 40-year plant life when the CEOG report regarding Item 1.d of the Bulletin is submitted.

S incere ly,

Enclosures:

As stated cc w/enclosure:

See next page Oliginal Sign+ g~:

Sheri R. Peterson, Project Manager Project Directorate V

Division of Reactor Projects - III, IV, V and Special Projects Office of Nuclear Reactor Regulation DISTRIBUTION BBoger EJordan NRC 5 Local PDRs PDV r/f DFoster SPeterson OGC ACRS(10)

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Mr. William F.

Conway Arizona Public Service Company Palo Verde CC:

Arthur C. Gehr, Esq.

Snell 5 Wilmer 3100 Valley Center Phoenix, Arizona 85073 Charles R. Kocher, Esq. Assistant Council James A. Boeletto, Esq.

Southern California Edison Company P. 0.

Box 800

Rosemead, California 91770 Senior Resident Inspector U.S. Nuclear Regulatory Commission HC-03 Box 293-NR Buckeye, Arizona 85326 Regional Administrator, Region V

U. S. Nuclear Regulatory Commission 1450 Maria Lane Suite 210 Walnut Creek, California 94596 Mr. Charles. B. Brinkman Washington Nuclear Operations Combustion Engineering, Inc.

12300 Twinbrook Parkway, Suite 330 Rockvi lie, Maryland 20852 hlr. Charles Tedford, Director Arizona Radiation Regulatory Agency 4814 South 40 Street Phoenix, Arizona 85040 Chairman Maricopa County Board of Supervisors 111 South Third Avenue Phoenix, Arizona 85003 Mr. Jack R.

Newman Newman E Holtzinger P.C.

1615 L Street, NW, Suite 1000 Washington, DC 20036

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