ML20196C893

Requests That Util Address Generic Ltr 88-17 Re Loss of DHR During Nonpower Operation.Industry Response to Generic Ltr 87-12 Deficient in Areas of Prevention of Accident Initiation & Mitigation of Accidents

ML20196C893
Person / Time
Site:	Prairie Island
Issue date:	12/02/1988
From:	Murley T Office of Nuclear Reactor Regulation
To:	Howard J NORTHERN STATES POWER CO.
References
GL-87-12, GL-88-17, NUDOCS 8812080122
Download: ML20196C893 (3)

Text

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Dockets Nos. 50-282 and 50-306 DEC m 2 m3 Mr. James J. Howard, President and Chief Executive Officer Northern States Power 414 Nicollet Mall Minneapolis, Minnesota 55401

SUBJECT:

LOSS OF DECAY HEAT REMOVAL We have just issued Generic letter 88-17 which addresses loss of decay heat removal (DHR) during nonpower operation.

This letter was issued because of the potential serious consequence of loss of shutdown cooling concurrent with significant core decay heat. Further, it is our belief that the industry as a whole has not aggressively responded to resolve the concern following its identification in our earlier Generic letter 87-12. In particular, the industry's response to the Generic Letter 87-12 was deficient in the areas of (1) prevention of accident initiation, (2) mitiga-tion of accidents before they potentially progress to core damage, and (3) control of radioactive material if a core damage accident should occur.

Generic Letter 88-17 prescribes expeditious actions which should immediately ease the concern; and parallel, but longer term, programmed enhancements which effectively address the root cause of the problems and permit greater flexi-biiity in operation.

We consider this issue to be of high priority and request that you assure that your organization addresses it accordingly.

Sincerely, Originni signed by Tho:.asE. L:rlcy Thomas E. Murley, Director Office of Nuclear Reactor Regulation cc: See next page g Office: LA/PDIII-1 PM/PDIII-1 (A)D/P -1 (A)Ab/DRSP Surname: RIngram h DDilanni:cr TQuay MVirgilio Date: 11/ A /88 g /;( /88 l'/v/88 y /,9 /88 Office: JhDfAR (

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• • "Occkets Nos. 50-282 and 50-306 Mr. James J. Howard, President and Chief Executive Officer Northern States Power 414 Nicollet Hall Minneapolis, Minnesota 55401

SUBJECT:

LOSS OF DECAY HEAT REMOVAL We have just issued Generic Letter 88-17 which addresses loss of decay heat removal (DHR) during nonpower operation.

This letter was issued because of the putential serious consequence of loss of shutdown cooling concurrent with significant core decay heat. Further, it is our belief that the industry as a whole has not aggressively responded to resolve the concern following its identification in our earlier Generic Letter 87-12. In particular, the industry's response to the Generic Letter 87-12 was deficient in the areas of (1) prevention of accident initiation, (2) mitiga-tion of accidents before they potentially progress to core damage, and (3) control of radioactive material if a core damage accident should occur.

l Generic Letter 88-17 prescribes expeditious actions which should immediately l Oase the concern; and parsliel, but longer term, programmed enhancements which i effectively address the root cause of the problems and permit greater flexi-l bility in operation.

We consider this issue to be of high priority and request that you assure that your organization addresses it accordingly.

Sincerely, 1 AWE k .

Thomas E. Murley, Director Office of Nuclear Reactor Regulation cc: See next page l

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Mr. James J. Howard Prairie Island Nuclear Generating Plant  ;

cc: l Gerald Charnoff, Esq.

Shaw, Pittman, Potts and Trowbridge 2300 N Street, N.W.

Washington, DC 20037 Dr. J. W. Ferman Minnesota Pollution Control Agency 520 Lafayette Road ,

St. Paul, MN 55155 Mr. E. L. Watzl, Plant Manager i Prairie Island Nuclear Generating Plant Northern States Power Company Route 2 Welch, Minnesota 55089 i

Jocelyn F. Olson, Esq. i Assistant Attorney General '

Environmental Protection Division Suite 200 l 520 Lafayette Road St. Paul, Minnesota 55155  !

U.S. Nuclear Regulatory Commission [

Resident Inspector's Office ,

1719 Wakonade Drive East Welch, Minnesota 55089

, Regional Administrator, Region III -

U.S. Nuclear Regulatory Commission  !

Office of Executive Director for Operations '

799 Roosevelt Road l Glen Ellyn, Illinois 60137 I

Mr. William Miller, Auditor  !

Goodhue County Courthouse  ;

Red Wing, Minnesota 55066 -

Mr. D. M. Musolf, Manager  !

l Nuclear Support Services '

Northern States Power Company I 414 Nicollet Mall Minneapolis, Minnesota 55401

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