ML20141F298

Forwards Request for Addl Info Re Fast Neutron Fluence Used in Derivation of PTS Ref Temp.Encl Describes Specifics of Info Needed.Info Requested within 45 Days of Ltr Receipt

ML20141F298
Person / Time
Site:	Beaver Valley
Issue date:	04/16/1986
From:	Tam P Office of Nuclear Reactor Regulation
To:	Carey J DUQUESNE LIGHT CO.
References
REF-GTECI-A-49, REF-GTECI-RV, TASK-A-49, TASK-OR TAC-59941, NUDOCS 8604220511
Download: ML20141F298 (4)

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APR 16 1986 Docket No. 50-334 DISTRIBUTION iNo- J. Partlow NRC PDR P. Tam

.. Local PDR D. Miller Mr. J. J. Carey, Vice President PAD #2 Rdg ACRS (10)

Duquesne Light Company T. Novak Tech Branch Nuclear Group OELD Gray File Post Office Box 4 E. Jordan G. Vissing Shippingport, PA 15077 B. Grimes R. Woods P. Randall

Subject:

Beaver Valley Unit 1, Request for Additional Information Regarding Neutron Fluence Estimates (TAC No. 59941)

By letter dated January 21, 1986, you submitted infonnation related to the fracture toughness regt.irements for protection against pressurized thermal shock events, as required by 10 CFR 50.61. We have reviewed your submittal and found that no justification was included for the fast neutron fluence which was used in the derivation of the RT PTS. The enclosure describes the specifics of our information needs.

Please provide the requested information within 45 days of your receipt of this letter. If additional time is needed for your response or if you need clarification (,f these questions, feel free to contact me.

This information request affects fewer than 10 respondents; therefore, OMB clearance is not required under P.L.96-511.

Sincerely, MI Peter S. Tam, Project Manager PWR Pro,iect Directorate #2 Division of PWR Licensing-A Office of Nuclear Reactor Regulation

Enclosure:

As stated cc: See next page L- D: PAD #2 PM:PADf4 PTam:hf) ,( LRubenstein er 4/[/86 4/g/80 4/16/86 1

8604220511 860416 PDR ADDCK 05000334 P PDR

Mr. J. J. Carey Beaver Valley 1 Power Station Duquesne Light Company CC:

Mr. W. S. Lacey Mr. Thomas J. Czerpah Station Superintendent Mayor of the Burrough of Duquesne Light Company Shippingport Reaver Valley Power Station Post Office Box 26 Post Office Box 4 Shippingport, Pennsylvania 15077 Shippingport, Pennsylvania 15007 Pennsylvania Power Company Mr. S. Sovick, Acting Superintendent James R. Edgerly of Licensing and Compliance Post Office Box 891 Duquesne Light Company New Castle, Pennsylvania 16103 Post Office Box 4 Shippingport, Pennsylvania 15077 Ohio Environmental Protection Agency Division of Planning Mr. John A. Levin Envi: onmental Assessment Section Public Utility Comission Post Office Box 1049 Post Office Box 3265 Columbus, Ohio 43216 Harrisburg, Pennsylvania 17120 Office of the Governor Gerald Charnoff, Esquire State of West Virginia o Jay E. Silberg, Esquire Charleston, West Virginia 25305 Shaw, Pittman, Potts and Trowbridge 1800 M Street, N.W. Charles A. Thomas, Esquire Washington, DC 20036 Thomas and Thomas 212 Locust Street Karin Carter, Esquire Box 999 Special Assistant Attorney General Harrisburg, Pennsylvania 17108 Bureau of Administrative Enforcement 5th Floor Executive House Irwin A. Popwsky, Equire Harrisburg, Pennsylvania 17120 Office of Consumer Advocate 1425 Strawberry Square Marvin Fein Harrisburg, Pennsylvania 17120 Utility Counsel City of Pittsburgh Governor's Office of State Planning 313 City-County Building and Development Pittsburg, Pennsylvania 15?19 ATTN: Coordinator, Pennsylvania State Clearinghouse Resident Inspector Post Office Box 1323 U.S. Nuclear Regulatory Commission Harrisburg, Pennsylvania 171?0 Post Office Box 298 Shippingport, Pennsylvania 15077 Mr. Jess T. Shuma h . Comissioner State of West V' .la Department Department of Environmental Resources of Labor ATTN: Director, Office of 1900 Washington Street, East Radiological Health Charleston, West Virginia 25305 Post Office Box 2063 Harrisburg, Pennsylvania 17105

.- w Duquesne Light Company Beaver Valley 1 Power Station cc:

David K. Heydinger, M.D.

State Director of Health State Department of Health 1800 Washington Street, East Charleston, West Virginia 25305 Regional Administrator, Region I U.S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, Pennsylvania 19406 Mr. Thomas M. Gerusky, Director Bureau of Radiation Protection Pennys1vania Department of Environmental Resources P.O. Box 2063 Harrisburg, Pennsylvania 17120 o

BEAVER VALLEY UNIT 1, REQUEST FOR ADDITIONAL INFORMATION REGARDING NEUTRON FLUENCE ESTIMATES TO THE PRESSURE VESSEL FOR 10 CFR 50.61 In tables I and II of the PTS submittal present and end-of-life peak fluence is given.

1. List the assumptions in the computer codes and the data used in the derivation of these values. -

2. Give the azimuthal distribution of the (Er,1.0MeV) neutron fluence to the inner surface of the pressure vessel, present and at the end of life.

3. Have core power distributions from the previous cycles been used in the evaluation of the present fluence?

4. Was a benchmarked code used for the estimation of the fluence?

5. Have the fluence values been compared to the results of surveillance capsules?

6. List the assomptions for future cycle power distributions.

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