ML17256A431

Advises That Exxon Nuclear Co Rept Re Upper Plenum Injection Will Be Submitted by mid-Feb 1983.Only Exxon Fuel Will Be in Reactor Until Spring 1984 Outage.Westinghouse Fuel Response Will Be Answered as Part of 1984 Fuel Reload

ML17256A431
Person / Time
Site:	Ginna
Issue date:	12/15/1982
From:	Maier J ROCHESTER GAS & ELECTRIC CORP.
To:	Crutchfield D Office of Nuclear Reactor Regulation
References
NUDOCS 8212220243
Download: ML17256A431 (4)

Text

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ACCES8ION NBR:8212220243 DOC ~ DATE! 82/12/15 NOTARIZED:

NQ DOCKET FACIL:50 244 Robert Emmet Ginna Nuclear Planti Unit ii Rochester G

05000204 AUTH BYNAME AUTHOR AFFILIATION MAIER~J ~ ED Rochester Gas 8 Electric Corp, RECIPeNAME RECIPIENT AFFILIATION CRUTCHFIELDtD ~

Operating Reactors Branch 5

S UBJECT: Advises "that Exxon Nuclear Co rept re upper plenum jnjection will be submitted by mid-Feb 1983.0n}y Exxon fuel wil'l be in reactor until Spring 1980 outage.l']estinghouse fuel response will be answered as part of 1984 fuel reload, DISTRIBUTION CODE!

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ROCHESTER GAS AND'LECTRIC CORPORATION

~ 89 EAST AVENUE, ROCHESTER. N Y. 14649 JOHN E. MAILER VICo VrookIont TC I.C P H0N f.

• RcA cooE TIo 546.2700 December 15, 1982 Director of Nuclear Reactor Regulation Attention:

Mr. Dennis M. Crutchfield, Chief Operating Reactors Branch No.

5 U.S. Nuclear Regulatory Commission Washington, D.C.

20555

Subject:

ECCS, Upper Plenum Injection R.

E. Ginna Nuclear Power Plant Docket No. 50-244

Dear Mr. Crutchfield:

Your letter dated November 15, 1982 requested that we submit ECCS models which specifically treat upper plenum injection.

As you noted, models have been developed as a part of the long-term effort to satisfactorily treat upper plenum injection since less sophisticated methods to bound upper plenum injection were developed in 1978.

We will submit by mid-February 1983, or reference on our docket, a report to be prepared by Exxon Nuclear Company.

Except for four demonstration assemblies in nonlimiting positions, only Exxon fuel will be in the Ginna reactor until the Spring 1984 outage.

Treatment of Westinghouse fuel response to upper plenum injection will be handled, if necessary, as a part of the 1984 fuel reload submittal.

The Exxon report to be submitted in February 1983 will include a set of sample calculations for a limiting break size for a generic two-loop plant with upper plenum injection and will include justification for not doing calculations for a spectrum of large break LOCAs.

We expect that the generic calculations will also show that existing ECCS calculations are conservative and will obviate the need for plant-specific calculations.

Very truly yours, 82i2220243 82i2i5 PDR ADQCK 05000244 P

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