ML20062C394

Application for Amend to License NPF-3,revising Tech Spec Table 3.7-3 to Reflect Steam Generator Auxiliary Feedwater Header Mod.Identification of Snubbers Removed & Relocated During Mod to Header Encl

ML20062C394
Person / Time
Site:	Davis Besse
Issue date:	07/30/1982
From:	Crouse R, Murray T TOLEDO EDISON CO.
To:
Shared Package
ML20062C380	List: ML20062C379 ML20062C394 ML20062C407
References
TAC-48349, NUDOCS 8208050242
Download: ML20062C394 (2)

Text

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APPLICATION FOR AMENDMENT TO FACILITY OPERATING LICENSE NO. NPF-3 FOR

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DAVIS-BESSE NUCLEAR POWER STATION UNIT NO. 1 Enclosed are forty-three (43) copies of the requested changes to the Davis-Besse Nuclear Power Station Unit No. 1 Facility Operating License No.' NPF-3, together with the Safety Evalution for the requested change.

The proposed changes include Table 3.7-3.

A Safety Evaluation for the Steam Generator Auxiliary Feedwater lleader overall modification is included.

By /49 b Station Superintendeht For R. P. Crouse Vice President, Nuclear Sworn and subscribed before me this 30th day of July, 1982.

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My Commission Expires June 30, 1987.

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q' 8208050242 820730 PDR ADOCK 05000346 c.

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.M Docket No.1 50-346 i 4

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July 30', 1982,<

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Attachment I r g

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1,nAppendix A

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Char.ges to Davis' Besse Nuclear Power Station Unit j

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Techijical Specifications, Table 3.7-3

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A.

Time r equired to Implement.

T'.11s change l's to be ef fective

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tryon NRC approval.

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Reason for Change (Facility Change Request d2-CW);

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The snubbers were' removed and relocated during the modific-

' ations to the Steam Generator Auxiliary Feedwater Header.

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33f. sty uvaluation '

Turine the current refueling outage (1982) at Davis-Besse

~. Nuclear Power Station Unit No. 1, tht: auxiliary feedwdter

< headers in the steam' generators were found damaged. As a result of this situation /an external, header way installed on teach s;. cam generator with'some rerouting,of piping,and ropports.

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,s With yhe rerouting of supports, two (2) s~nnbbers were removed (6C-E'!B-4-li6 and,6C-EBB-4-1(7) and one',(1): was relocated x

(6C-/FB-4-H15) at a dif ferent elevatiun. The dafety function df' hydraulic-snubbir~s is to' ensure that the structural v 6

integrity of the saf' ty "related Mtees is.=dintained during e

and following a seismic or other' event causing initiation of

, dynamic loads.'

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,1 Thq T.nalysis' of the rerouted ytpinc and header has concluded that;the relocation of one and remocal 4 tvo snubbers would neet ' the design objective to pro,1de structural integrity of the affected system during!and following al seismic or other

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event initiating dynamic loads. The reloca:ei snubber will cer.tinue to perform its intended safety fundtion and the retsoved snubbers will not adversely affect.the safety function of--the Auxiliary Feedwater systecG Therefores this is not a unreviewed safety question.

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