ML20234D040

Forwards Util Reporting Drift in Trip Level Settings of Two Reactor Protection Sys Instruments & Two Primary Containment Isolation Sys Instruments & 721202 Twx Re RCIC Isolation Valve Failing to Close.W/O Encls

ML20234D040
Person / Time
Site:	05000000, Quad Cities
Issue date:	12/08/1972
From:	Skovholt D US ATOMIC ENERGY COMMISSION (AEC)
To:	Seiss C Advisory Committee on Reactor Safeguards
Shared Package
ML20234A777	List: ML20234A773 ML20234A785 ML20234B065 ML20234B385 ML20234B393 ML20234B406 ML20234B432 ML20234B565 ML20234B626 ML20234B647 ML20234B673 ML20234B680 ML20234B689 ML20234B696 ML20234B714 ML20234B724 ML20234B742 ML20234B758 ML20234B774 ML20234B777 ML20234B794 ML20234B828 ML20234B839 ML20234B891 ML20234B899 ML20234B901 ML20234C039 ML20234C061 ML20234C089 ML20234C118 ML20234C134 ML20234C169 ML20234C181 ML20234C217 ML20234C241 ML20234C296 ML20234C306 ML20234C318 ML20234C355 ML20234C397 ML20234C403 ML20234C407 ML20234C411 ML20234C427 ML20234C429 ML20234C513 ML20234C519 ML20234C536 ML20234C540 ML20234C544 ... further results
References
FOIA-87-40 NUDOCS 8707070079
Download: ML20234D040 (1)

Text

_

[#

(5)['?

UNITED STATES ATOMIC ENERGY COMMISSION

[

WASHINGTON, D.C. 20545

'%[si,rn e,/

u.

December 8, 1972 Docket No. 50-265 D

i-32

,,EE

<J Dr. Chester P. Siess Chairman, Advisory Cormittee on Reactor Safeguards U. S. Atomic Energy Conmissian Washington, D. C.

20545

Dear Dr. Siess:

Sixteen (16) copies of the following am transmitted for the Conmittee's information:

Letter from Commonwealth Edison Company dated December 1, 1972, reporting a drift in trip level settings of two reactor protection system instruments and two primary containment isolation system instruments at Quad-Cities Unit 2.

1 WX from Commonwealth Edison Company dated December 2,1972, i

reporting that a RCIC isolation valve f ailed to close during 1

the monthly surveillance test at Quad-Cities Unit 2.

i l

}

Sincerely, j

1 V:V // ',' M, /r/

Donald J. e.ov6olt Assistant Director for Operating Reactors Directorate of Licensinc;

Enclosures:

As stated

/% _ _.., - -,

e e m 'f 7

[9 m r ;

l r

f

,y a

..../

f l

)

i

.,I.'

)

If kDfO 9 870610 THOMASey-40 PDR