ML17310A472

Forwards SE Concluding That CEOG Rept CEN-387-P,rev 1, Pressurizer Surge Line Thermal Stratification Evaluation Adequately Demonstrates That Bounding Surge Line & Nozzles Meet ASME Code Stress & Fatigue Requirements

ML17310A472
Person / Time
Site:	Millstone, Calvert Cliffs, Palisades, Palo Verde, Saint Lucie, Arkansas Nuclear, Waterford, San Onofre, Maine Yankee, Fort Calhoun
Issue date:	07/16/1993
From:	Linh Tran Office of Nuclear Reactor Regulation
To:	Conway W ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
Shared Package
ML17310A474	List: ML17310A472 ML17310A476
References
IEB-88-011, IEB-88-11, TAC-M72152, TAC-M72153, TAC-M72154, NUDOCS 9308040142
Download: ML17310A472 (7)

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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 July 16, 1993 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 85072-3999

SUBJECT:

SAFETY EVALUATION FOR COMBUSTION ENGINEERING OWNERS GROUP REPORT CEN-387-P, REVISION 1, "PRESSURIZER SURGE LINE THERMAL STRATIFICATION EVALUATION" BULLETIN 88-11 (TAC NOS.

M72152, M72153, AND M72154)

By letter dated March 6,

1989, as supplemented by letter dated April 3,

1990, you responded to NRC Bulletin 88-11 and indicated that you were participating in the Combustion Engineering Owners Group (GEOG) effort to evaluate pressurizer surge line thermal stratification.

The staff and its consultant, Brookhaven National Laboratory, have completed their review of the CEOG Report

, CEN-387-P, "Pressurizer Surge Line Flow Stratification."

The staff concludes that the CEOG analysis adequately demonstrates that the bounding surge line and nozzles meet ASME Code stress and fatigue requirements for the 40-year design life of the facility considering the phenomenon of thermal stratification and thermal striping.

The staff's safety evaluation of CEN-387-P, Revision 1, is enclosed.

Action 1.d of Bulletin 88-11 required licensees to update their stress and fatigue analyses to ensure compliance with applicable Code requirements.

The GEOG Report can be used to update plant-specific Code stress reports as required by Item 1.d.

Please verify the applicability of the GEOG bounding analysis in CEN-387-P, Revision 1 to Palo Verde Nuclear Generation Station, Units 1, 2, and 3.

In addition, please confirm that all actions required by Bulletin 88-11, including the updating of the plant-specific stress and fatigue analyses required by Action 1.d, have been completed.

Your response is requested within 60 days of receipt of this letter.

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Hr. William F.

Conway July 16, 1993 This request is covered by Office of Management and Budget Clearance Number 3150-0011, which expires June 30, 1994.

The estimated average number of burden hours was already accounted for in the original bulletin, NRC Bulletin 88-11, "Pressurizer Surge Line Thermal Stratification," dated March 29, 1989.

Sincerely, Origina! signed tip Linh N. Tran, Project Manager Project Directorate V

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

Enclosure:

Safety Evaluation cc w/enclosure:

See next page DISTRIBUTION:

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Mr. William F.

Conway This request is covered by Office of Management and Budget Clearance Number 3150-0011, which expires June 30, 1994.

The estimated average number of burden hours was already accounted for in the original bulletin, NRC Bulletin 88-11, "Pressurizer Surge Line Thermal Stratification," dated March 29, 1989.

Sincerely, Linh N. Tran, Project Manager Project Directorate V

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

Enclosure:

Safety Evaluation cc w/enclosure:

See next page

I

Mr. William F.

Conway Arizona Publ ic Servi ce Company Palo Verde CC:

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

Phoenix, Arizona 85007 James A. Beoletto, Esq.

Southern California Edison Company P. 0.

Box 800

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

Tonopah, Arizona 85354-7537 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 Rockville, Maryland 20852

'r.

Aubrey V. Godwin, 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 5 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.

Bradley W. Jones, Esq.

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

20036 Mr. Thomas R. Bradish, Manager Nuclear Regulatory Affairs Arizona Public Service Company P. 0.

Box 52034

Phoenix, Arizona 85072-2034