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

'w y,

ft Wisconsin;

\\ Electnc

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 solder joints of either the detector essembly cable. or the. in-e 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 _e were awaiting _the 089/NRC-89-020),_ 'we notified you-that w

-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 monitors was being: delayed >until the first refueling outage for each 1

unit after Gamma-Metrics provided the qualified items:to us. 'At the o

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

[4

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

Since repair kits 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 components will be replaced.

The justification for continued E

k yR7 KM Ek?

A suMthydHinvasia EnessCmwaim k_

1-1

_.iNRC Document' Control DDsk'

. M+

Juni 22, 1990, Page 2-I operation provided with our:- August 9,

1988 letter- (Ref. VPliPD '

s 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 i:

s s i

i i

I 4

-i

~i l

1 i

i r'

i i

l

'i,) ' -

t