ML17305B560

Forwards Audit of Facility Conducted on 910220-21 to Review Implementation & Results of Util Program to Address NRC Bulletin 88-011 Issues Re Pressurizer Surge Line Thermal Stratification

ML17305B560
Person / Time
Site:	Palo Verde
Issue date:	05/17/1991
From:	Catherine Thompson Office of Nuclear Reactor Regulation
To:	Conway W ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
References
IEB-88-011, IEB-88-11, NUDOCS 9106030175
Download: ML17305B560 (5)

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t UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON. D.C. 20555 May 17, 1991 9dMer wi~~-

Docket Nos.

50-528, 50-529 and 50-530 Mr. William F.

Conway Executive Vice President, Nuclear Arizona Public Service Company P. 0.

Box 53999 Phoenix, Arizona 85073-3999

SUBJECT:

AUDIT OF PALO VERDE NUCLEAR GENERATING STATION (PVNGS)

ON BULLETIN 88-11 ISSUES REGARDING SURGE LINE THERMAL STRATIfICATION The staff of the Mechanical Engineering Branch of the Nuclear Regulatory Commission and its consultant, the Brookhaven National Laboratory, conducted an audit of the Palo Verde Nuclear Generating Station (PVNGS) on February 20-21, 1991.

The purpose was to review the implementation and results of your program to addressBulletin 88-11 issues regarding pressurizer surge line thermal stratification.

The Bulletin requested all PWR plants to conduct an inspection of the surge line and its supports for possible distress or damage, and to perform reanalysis to confirm that the surge line meets the applicable code requirements for the licensed life of the plant.

During the audit, technical details and status of your program were discussed.

The team also reviewed several selected documents including inspection reports, operating logs and procedures, calculation

packages, monitoring data, and plant

- drawings.

A detailed audit report which delineates our efforts, findings and conclusions is enclosed.

Inspection of the surge line in all three units has been completed with no evidence of degradation.

Temperature and displacement data in Unit 3 were monitored.

PVNGS is a participant of the CE Owners Group (CEOG), which is scheduled to complete a generic detailed analysis for all CE plants by July 1991.

The completion of an additional plant specific analysis, which is needed to verify code compliance and to close out the Bulletin, is scheduled for October 1991.

The audit team concluded that your program for addressing the Bulletin issues is acceptable and proceeding well.

However, 13 technical

issues, 10 generic to GEOG and 3 specific to PVNGS were identified as open (see Section 3.0 of the enclosed report) and require resolution.

The 10 generic issues were Vi06OS0S75 9>05>7 PDR ADOCK 05000528 P

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Mr. William F.

Conway discussed in a meeting with GEOG on May 7 and 8, 1991, and will be addressed in subsequent correspondence.

PVNGS agreed to address the 3 specific issues before their final submittal in October 1991.

Sincerely,

Enclosure:

As stated cc w/enclosure:

See next page Catherine Thompson, Project Manager Project Directorate V

Division of Reactor Projects III/IV/V Office of Nuclear Reactor Regulation DISTRIBUTION

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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 James A. Beoletto, 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, Manager Washington Nuclear Operations ABB Combustion Engineering Nuclear Power 12300 Twinbrook Parkway, Suite 330 Rockv i 1 le, Maryland 20852 Mr. 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 Jack R.

Newman, Esq.

Newman

& Holtzinger, P.C.

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

20036 Ignacio R. Troncoso Senior Vice President El Paso Electric Company Post Office Box 982 El Pasco, Texas 79960 Roy P. Lessey, Jr.,

Esq.

Bradley W. Jones, Esq.

Akin, Gump, Strauss, Hauer and Feld El Paso Electric Company 1333 New Hampshire Ave., Suite 400 Washington, D.C.

20036