ML20090G971

Concurs That PRA Methodology Helpful in Highlighting Aspects of Design & Operation Important to Reactor Safety,Per NRC .Aspects of Future PRA Use Listed.Consultant Engaged to Identify Alternate Risk Assessment Uses

ML20090G971
Person / Time
Site:	Limerick
Issue date:	07/23/1984
From:	Boyer V PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	Harold Denton Office of Nuclear Reactor Regulation
References
OL, NUDOCS 8407260026
Download: ML20090G971 (3)

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PHILADELPHIA ELECTRIC COMPANY 2301 MARKET STREET P.O. BOX 8699 l l

PHILADELPHIA. PA.19101  !

84b4500 V. S. BOY ER -

c ,R. v,C E ,a== = = ~ r N UCl.E A R PC WE R JUL 2 31984 Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation $j_3g~9/3g7J l U.S. Nuclear Regulatory Ccmnission.

Washington, D.C.- 20555

SUBJECT:

-Limerick Generating Station, Units 1 and 2 NRC Review of Limerick Risk Assessment 1ert.KtzJCE: Letter: H. R. Denton to V. S. Boyer, dated June 7, 1984

Dear Mr. Denton:

We appreciate your providing us with suggested insights relating to .the use of risk methodology during Limerick Generating Station

. operation. We concur that probabilistic risk assessmnt methodology has been, and can continue to be, helpful in highlighting those aspects of' design and operation which are particularly important to reactor safety. As' a result, Philadelphia Electric Ccmpany is evaluating ways

-in-which risk assessment technology can be most effectively applied to tid operation of Limerick Generating Station.

Our; initial assessment has identified the following aspects of

.futum PRA use:

• . Philadelphia Electric Cmpany will take steps to maintain and use- the PRA methodology to develop safety and reliability insights.

• The continuina PRA maintenance and associated analyses will be an engineering function in support of both operations and engineering activities.

Operating personnel will use the results and will have the authority to request non-routine analyses or studies frcxn the engineering service organization.

• - The primary quantitative measure of safety impacts would be core melt frequency due to internal initiators.

• JIhe insights gained through- probabilistic analysis will be disseminated throughout our existing organization, which has effectively assured safety and quality over the years.

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8407260026 840723 p{ l PDR ADOCK 05000 A ig

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G. We have engaged a consultant to identify alternate ways in which we can use risk assessment at' Limerick. We will review the results in combination with additional information, including the insights 3ou

'have provided, arxl will establish an ongoing scope of work which incorporates the items highlighted above. Our plans will include periodic. reevaluations to assure that our resources are being expended effectively and that the results of ongoing rulemaking, research and experience of others are all reficded in our efforts.

~We are hopeful that this report on the status of Philadelphia

. Electric. Canpany's thinking in the area of continued use of PRA concepts is responsive to your June 7,' 1984 letter.

Sincerely, n

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- 'ARD/dg/07128402 Copy to: See Attached Service List r

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- cc:.-Judge Lawrence Brenner Judge Richard F. Cole

~ Troy B. Conner, Jr. , Esq.

Ann P. Hodgdon, Esq.

Mr. Frank R. Rmano Mr. Bobert L. Anthony Charles W. Elliot, Esq.

Zori G. Ferkin, Esq.

/Mr. Thmas Gerusky Director, Penna.. Emergency ManagementiAgency Angus R. Inve, Esq.

David Wersan,.Esq.

Robert J. Sugarman, Esq.

Spence W. Perry, Esq.

l Jay M. Gutierrez, Esq.

Atmic Safety & Licensing

-- Appeal Board 1 Atmic Safety & Licensing n Board Panel b . Docket & Service Section-Martha W. Bush, Esq.

-Mr.. James Wiggins

.Mr. Timothy R. S. Campbell

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- : Ms;- Phyllis Zitzer .

i ' Judge Peter A. Morris

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