ML20055D623

Advises of Decision to Proceed W/Leak Testing of Sys During Plant Refueling Outage Due to Delay in Delivery of Gamma-Metrics Hardware Fix Kits.Test Revealed That Both in-containment Cable & Detector Assembly Cable Had Leaks

ML20055D623
Person / Time
Site:	Point Beach
Issue date:	06/22/1990
From:	Fay C WISCONSIN ELECTRIC POWER CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
CON-NRC-90-063, CON-NRC-90-63, REF-PT21-90, RTR-REGGD-01.097, RTR-REGGD-1.097 VPNPD-90-306, NUDOCS 9007090197
Download: ML20055D623 (2)

Text

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POWER COMPANY .

[ 231 W Michgort Po. Box 2046. Mdwoukee, WI 53201 (414)221 2345

, VPNPD-9 0'- 30 6 -

NRC-90-063 June 22', 1990 Document Control Desk U.S. Nuclear: Regulatory Commission iMail Station P1-137

' Washington,.DC 20555 Gentlemen:

DOCKETS 50-266 AND 50-301 ENVIRONMENTAL OUALIFICATION PROGRAM FOR REGULATORY GUIDE-1.97 INSTRUMENTS POINT BEACH NUCLEAR PLANT. UNITS 1 AND 2 On'May 10, 1988, Gamma-Metrics issued a 10CFR Part 21 notification

' stating.that, due to manufacturing problems, leaks may exist in the e

solder joints of either the detector essembly cable . or the. in-containment cable of their environmentally _ qualified Neutron Flux Monitor _- Systems. This system is installed -in each unit at Point Beach.- In a' letter to you~ dated February 17, 1989-(Ref..VPNPD 089/NRC-89-020),_ 'we notified you- that _e w were awaiting _the

-availability of qualified test procedures, hardware : fix kits, and-installation procedures from: Gamma-Metrics for our system.- The

%< confirmation-of the environmental qualification of our neutron flux 1 monitors was being: delayed >until the first refueling outage for each o unit after Gamma-Metrics provided the qualified items:to us. 'At the

% time'the letter was. written, iti was believed that the qualified kits-would-be available< for our Fall .1989 refueling outage. Gamma-Metrics has still not made these' items available to'us. Hrvtever, due-to the.

" lengthy delay in receipt of these< items, we have decided to-proceed 1

with the leak testing of our systems during each' dnit's 1990 refueling outage.

~ During our Spring 1990 refueling: outage, a Gamma-Metrics field service representative pressure tested our Unit 1 neutron flux monitor system

-i cables. 'It was determined by the test that both the in-containment

( cable and the -detector aesembly's cable had leaks. Since repair kits

[4 were not'available, both of the defective components were replaced.

=si The final system'was again pressure tested and was found to exhibit

, no measurabin pressure drop over the 10 minute test period.- As a result, .ths Unit i uystem han been certified to be environmentally

. qualified by Gamma-Metrics.. Testing of the Unit 2 system is scheduled

f or . the Fall 1990 refueling outage at which time any defective E components will be replaced. The justification for continued k

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_.iNRC Document' Control DDsk'

. M+ Juni 22, 1990,

, Page 2-I s operation provided with our:- August 9, 1988 letter- (Ref. VPliPD ,

411/NRC-88-07 3 ) ~, which _ concludes that - we can continue to safely ,

i operate the Point Beach Nuclear Plant with this condition, is-still j applicable'to Unit-2. '!

Very truly.yours,

.) )

C. W. Fay.  !

.Vice President Nuclear Power

SWO/a.lg  !

Copy-.to: NRC Resident' Inspector NRC Regional Administrator, Regien.III s s i:

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