ML20090B392

Disputes NRC Contention That Util Proposed Confirmatory Tests on Electrical Connectors Must Include Addl Margin at Temp of 1-h for Any Temp Transient Calculated to Be Less than 1-h.Clarification Requested

ML20090B392
Person / Time
Site:	Mcguire, McGuire, 05000000
Issue date:	11/09/1981
From:	Sniezek J Office of Nuclear Reactor Regulation
To:	Vollmer R Office of Nuclear Reactor Regulation
Shared Package
ML20090B024	List: ML20090B046 ML20090B392 ML20090B566 ML20091S205 ML20091S333
References
FOIA-83-765 NUDOCS 8203030187
Download: ML20090B392 (2)

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MEMORANDUM FOR: Richard H. Vollmer. Director. Division of Engineering. MR i

i FROM:

James H. $ntezek. Director. Division of Resident and Reglenal Reacter laspecties. IE l

SUSJECT:

DUKE pWM CarANY (DPC) PR0p0$D CONFIRMATORY TEST 5 W ELECTRICAL COMECTORS AND STAFF INTRpRETATIM OF REqu! RED TEST MAasins.

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l As you know DpC is conducting additional polification tests on the Mcesire l

electrical penetration assablies (epa) including the mating connectors and cables. These confirmatory tests are being conducted as the result of failures in the electrical connectors which have been attributed to the accelerated aging method used during RC sponpred. Sandia-conducted tests on a similar i

unit. Durias recent discussioes of the proposed OpC testing which is scheduled -

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to start november 2.1981. Zoltaa Rosatecay espressed his vise that all current testing of electrical epipment must include an addittenal margie at temperature

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l of I hour for any temperature treastant calculated te he less than as hear. f c, Therefore, equipment required to.functica dettag or after the high temperstere, I

short duration'N5LA event would had.to be tested to the peak temperature for l

i the additional I hour. We are not sunre of any reptrement or technical argument to support this view.

j IEEE 323-1974 Section 6.3.1.5. provides the basis for applying margin and l

identifies the subject values. None of the values exceed 10% of the service i

j conditions.

The staff has endorsed these values in NURES-0588. Section 3(2).

l The only requirment for a 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> margin is in NUREG-0588. 5ecedon 3(4). This requirement is for.the add.itional time that equipment must remain functional i

if it performs its safety function during the initial portion"ef an event.

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The arbitrary imposition of a 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> margin at taperatore to short ters high tosperature transients will impact those industry tests which are in progress (e.g. Westinghouse tests on Limiterque valve operators and the Wisconsin

, Electric power Campany trans..mitter tests being. conducted...f.or.s.e.v. era.l..util.it.i.e.s) i CONTACT:

D. a. Mcdonald. IE 49-24766

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NOV 9 1981 R.H. Yelled '

This matter came to my attention because of It's involvesent in laboratory accreditation and verification testing. We feel there must be some misces.

munication regarding the time at temperature matter.

Please advise.

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James N. Seierek. Mrector Divisten of Resident and Regional Reacter Inspection i

Office of Inspection and Enforcement i

scs R. C. Defoung. IE W. R. Danten. NRR V. Stello, DEDROGR I

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VSP:RRRI !E C VSP:RRR!:!E 0 DRRRI IE 0 Mcdonald GWReinmuth JH$nierek l

11/ / 8ttjr 11/ /81 11/ /81 i