ML18136A112

Request for Review & Issuance of Safety Evaluation,Submitted on Behalf of Util Group for Regulatory Application

ML18136A112
Person / Time
Site:	Surry, North Anna
Issue date:	10/22/1979
From:	Ragone S VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	Harold Denton, Schwencer A Office of Nuclear Reactor Regulation
Shared Package
ML111230353	List: ML111230352 ML18136A112
References
NUDOCS 7910290277
Download: ML18136A112 (4)

Text

.,.

e e VIH.OINIA ELECTRIC A.ND POWER COMPANY RICHMOND, VIRGINIA. 23261 STANL'EY HAOONI!

J>JiEHIDHN"l' October 22, 1979 Mr. Hatold.R. Denton, Director Office of Nuclear Reactor Regulation*

Attn: Mr. Robert Baer, c;::hief Light Water Reactors Branch No. 2 Division of Project Management United States Nuclear Regulatory Commission Washington, DC 20555

Dear Mr *. Denton:

The Utility Group for.Regulatory Application has been chartered by 20

.. utilities holding nuclear constr~ction and/or operating licenses to obtain the generic review.of the RETRAN computer code .. The RETRAN computer code, which was developed under. the sponsorship of the Electric Power _l{esearch Institute, is rapidly becoming the principal system safety analysis capability for a substantial

. portion of the utility industry. RETRAN was developed from the RELAP-4 series of codes and reference data derived from extensive analytical and experimental work for clescribfo::i; the thermal-hyd:rnulic behavior .of LWR' s under postulated accident and operational transient conditions. Thus, RETRAN includes proven thermal-hydrau-lic models obtained from curre~t accide.nt and transient analysis codes, as well as other improvedmodels. For.this reason, it is now desirable to have the NRC become familiar with the RETRAN code and to resolve any technical* concerns that the NRC may have with the code's application to utility licensing submittals.

Due to the large.number of potential applications .of the RETRAN code, which will.require NRC *Licep.sing action, a topical review is appropriate.*

Therefore, it is requested that the NRG formally review the RETRAN computer code documentation (EPRI-CCM-5 Volumes 1-4). The appropriate number of copies of these topical reports will be provided by EPRI under separate cover. Among the intended applications are the use of RETRAN to evaluate and improve system design and operation, to evaluate safety considerations, and to support licensing

• subrnittals. It is the desire of this* group to have the NRC review the applicabi-lity of the RETRAN computer code for performing accident and transient analysis (excluding analysis performed in compliance ,.iith .Appendix K to 10 CFR 50) for both PWR's and BWR's and issue a Safety Evaluation Report. Plant specific applica,tion and qualification will be the responsib:i.lity of each utility using the RETRAN computer code.

To support your review, members of the group will .submit, by separate letter, their intenrled plans for application .0f RETRAN and commitment that the fee for this review (up to a maximum of $20,000) will be paid on an equal share basis by all the member companies. The list of member companies is provided in At ta ch men t. 1.

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VIHOINIA ELECTJIIC AND POWEH COMPANY TO Mr. Denton 2 October 22, 19 79 The*utility group consists of a chairman, an executive connnittee, and members. The executive committee is charged with providing the coordination

.necessary to accomplish the NRC review of RETRAN as a method for performing reactor transient*and accident analysis. The executive committee members are identified in Attachment 2.

Your timely review and issuance of a Safety Evaluation Report on the RETRAN topic.al report documentation will be appreciated, Should you have questions or desire technical briefings, please contact the group's chai'rman, Mr *. M*. L. Bowling (Virginia Electri~ and Power Company - 8o"4~771-3183).

Very*

Attachments*

cc: Director, Division of Operating Reactors, NRC Director, Division of System Safe i:y, Hl.'.C Dr. Floyd L. Culler, EPRI Dr *. B.. R. Seghal, EPRI Dr. S. H. Weiss, Reactor Safety Branch, NRC Utilities Shown On Attachment 1

• ATTACHMENT 1 ARIZONA PUBLIC SERVICE COMPANY COMNONWEAL111 EDISON COMPANY CONSOLIDATED EDISON COMPANY CONSln-IERS POWER COMPANY DETROIT EDISON COMPANY DUKE POWER COHPANY FLORIDA POWER & LIGHT COMPANY GPU SERVICE CORPORATION LONG ISLAND LIGHTING COMPANY MIDDLE SOUTH SERVICES INCORPORATED NORTHEAST UTILITIES PENNSYLVANIA POWER AND LIGHT COMPANY PHILADELPHIA ELECTRIC COMPANY POWER AUTHORITY OF THE STATE OF NEW YORK PUBLIC SERVICE ELECTRIC AND GAS COMPANY SOUTHERN cm!P ANY SERVICES, INC.

TENNESSEE VALLEY AUTHORITY VIRGINIA ELECTRIC Ai."'lD POWER COMPANY WASHINGTON PUBLIC POWER SUPPLY SYSTEH YANKEE ATm!IC ELECTRIC COMPANY

t ...; . , * \.

I' ATTACIIMENT 2 t.

EXECUTIVE COMMITTEE MEMBERS -*

VIRGINIA ELECTRIC & POWER COMPANY* - M. L. BOWLING (804) 771-3183 COVi.110NWEALTH EDISON COMPANY - C. W. SOLBRIG (312) 294-8150 MIDDLE SOUTH SERVICES COMPANY - R. T. FINCH (504) 529-5262 YANKEE ATOMIC ELECTRIC COMPANY - P.A. BERGERON (617) 366-9011