ML19224B861

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Urges More Conservative 3-loop Requirement by Keeping Only One Reactor Coolant Pump in Operation,Ie Bulletin 79-068
ML19224B861
Person / Time
Site: Crane Constellation icon.png
Issue date: 05/07/1979
From: Williams F
Office of Nuclear Reactor Regulation
To: Eisenhut D
Office of Nuclear Reactor Regulation
References
NUDOCS 7906270101
Download: ML19224B861 (1)


Text

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7 5-7-79 Date MEMORAtlDUM FOR: Darrell G. Eisenhut, Deputy Director, Division of Operating Reactors THRU:

Steven A. Varga, Chief, Light Water Reactors Granch tio. 4, Division of Project Management FROM:

F. J. Williams, Jr., Technical Coordinator, Division of Project Management

SUBJECT:

PROBLEMS - T!il BULLETI 1 RESP 0 iSES Bulletin 79-068

, Pla t Maine Yankee j

Source S. Varga Review Group

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Resolution required for safety evaluation D Problem -

Generic -

The licensee (3 loppS 1 pump per loop CE Design) was advised that they must meet the ] 3 loo,p requirement, i.e., keep 2 RCP's in operation.

They will meet our requirement * ' think it would be more conservative to operate only 1 RCP thereby keeping 2 RCP's in reserve for longer term accident recosery and cooldown. This philosophy is applicable to other licensees.

Assessment by Problem Group -

Licensee may have valid concern. Should be reviewed on high priority basis.

Additional information available - Maine Yankee "esponse contains scme additional words in this regard.

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7 5-7-79 I. D.

Date MEMORAtiDUM FOR:

Darrell G. Eisennut, D.;uty Director, Division of Operating Peactors THRU:

Steven A. Varga, Chief, Light "ater Reactors Branch fio. 4 Division of Project Management FROM:

F. J. Williams, Jr., Technical Coordinator, Division of Project Management

SUBJECT:

PROBLEMS - TMI BULLETiti RESP 0liSES Bulletin 79-06B

, Plant Maine Yankee Source S. Varga Review Group Resolution required for safety evaluation fio Problem -

Generic -

The licensee (3 loppS 1 pump pec loop CE Design) was advised that they must meet the W 3 loo,p requirement, i.e., keep 2 RCP's in operation.

They will meet our requirement but think it would be more conservative to operate only 1 RCP thereby keeping 2 RCP's in reserve for longer term accident recovery and cooldown. This philosophy is applicable to other licensees.

Assessment by Problem Group -

Licensee may have valid concern.

dhould be reviewed on high priority basis.

Additional infonnation available - ffaine Yankee response contains some addi tiona' irds in this regard.

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