ML20147C771

Request for Addl Info on Fire Protec W/Addl Staff Position Re Fire Rating of Barriers Separating Diesel Generator Rooms from Corridor to Screenhouse

ML20147C771
Person / Time
Site:	Kewaunee
Issue date:	10/06/1978
From:	Schwencer A Office of Nuclear Reactor Regulation
To:	James E WISCONSIN PUBLIC SERVICE CORP.
References
NUDOCS 7810130110
Download: ML20147C771 (4)

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October 6,1978

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Docket No. 50-305 Wisconsin Public Service Corporation ATTN: Mr. E. W. James-Senior Vice President Post Office Box 1200

• T Green Bay, Wisconsin 54305 Gentlemen:

We have completed our review of your responses to our previous requests for information and staff positions submitted by letters dated July 28, 1978 and August 4, 1978. As a result of our con-tinuing review and as a result of the meeting between your represent-atives and members of our staff on September 28-29, 1978, we have developed a request for additional information which is enclosed with this letter. We are also enclosing an additional staff position regarding the fi;e rating of barriers separating the diesel generator rooms fmm the corridor to the screenhouse.

You are requested to respond to the enclosed request for infor-mation and staff position by October 18, 1978.

Sincerely, t U

A. Schwencer, Chief Operating Reactors Branch #1 Division of Operating ',eactors

Enclosures:

1.

Request for Additional Infonnation and Staff Position cc: w/ enclosure See next page 77/ f f 3 9 Ilh A

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Enclosure Request for Additional Information j

and Staff Position 1

Kewaunee Nuclear Power Plant 1

4 Docket No. 50-305 40.

Provide the results of your evaluation of the adequacy of fire-rated barriers throughout the plant; indicate where j

upgrading of barriers is necessary. -(3.1.2, 3.1.8,3.1.26).

41.

Provide the results of your evaluation of the separation of safe shutdown cables in conduit from redundant cables.

Indicate where modifications will be required. (3.1.15)-

42.

Identify the motor control centers for safety-related equipment which require protection from water spray and flooding caused by fire protection system failure or inadvertent actuation and describe the protection to be provided.

(3.1.24) 1 43.

Identify which fire doors protecting safe shutdown areas from large fire hazards or separating areas containing redundant safe shutdown cables or equipment will be electri-cally supervised for fire protection.

(3.1.25)

I 44.

Provide the results of your evaluation of the ability of service water hose lines in the reactor building to reach i

significant concentrations of combustibles in safety-related areas.(3.1.29)

I 45.

Provide the results of your evaluation of the specifications and installation details for unlabeled fire door frames

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to demonstrate that the frames are equivalent to designs described in UL 63, " Standard for Safety of Fire Door Frames", Fifth Edition, November 19,1976.(3.1.30) l

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47.

Identify the function of the redundant cables in conduit l

located in the diesel generator rooms. (5.11.3)

48. > Provide the results of your evaluation of the postulated.

causes and consequences of a circulating water pump lube-oil fire. (5.15) 49.

Provide the results of your evaluation of means for providing safe shutdown independent of cabling and equipment in the relay room. (4.10.5.6.3)

P32. The fire barriers separating each diesel generator room from the corridor -to the screenhouse are 1-1/2 hour fire rated due to the 1-1/2 hour fire doors and dampers in each barrier.

l These barriers serve to separate diesel generator oil hazards from redundant service water pump power cables located in the corridor.

I To provide adequate protection for the service water pump power cables from potential diesel generator room exposure I

fires, these barriers should be upgraded to a three-hour fire rating or a sprinkler system should be provided for the electrical cables in the screenhouse corridor.

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. Wisconsin Public Service. Corporation

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cc: Steven E. Keane, Esq.uire Foley and Lardner 777 East Wisconsin Avenue Milwaukee, Wisconsin 53202 Kewaunee Public Library j

314 Milwaukee Street j

Kewaunee, Wisconsin 54216 4.$

Stanley Lacrosse Chairman, Town of Carlton Route 1 Kewaunee, Wisconsin 54216 l

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