ML20235D277

Forwards Util Re Damaged Restraints & Hangers on RHR Sys & Re Unit Failing to Operate Due to High Crankcase Pressure.W/O Ltrs

ML20235D277
Person / Time
Site:	05000000, Quad Cities
Issue date:	04/20/1972
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 8707100110
Download: ML20235D277 (2)

Text

---

(

1 f4 u /. -

",,,,,'*e,,,'t UNITED STATES h,

ATCMIC ENERGY COMMISSION I 'l C4*

/*

WASHINGTON, D.C. 20545

• o,l ^l

FECitVEG 4ern e April 20, 1972 E!?!R 21 IM ll 45 Docket No. 50-25/4 COMM. '3. Asau.. ,u DVISOftY COMcillTEE ON .El.CTOs 5AFEGUARDS Dr. Chester P. Siess Chairman, Advisory Comittee on Reactor Safeguards U. S. Atomic Energy Cm mission Washington, D. C. 20545

Dear Dr. Siess:

1 Sixteen (16) copies of the following are transmitted for the Conmittee's information: Letter from Commonwealth Edison Company dated April 11, 1972, reporting that during a routine inspection at Quad Cities Unit #1 seismic restraints and pipe hangers on the residual heat removal system were found to be damaged. I TWX from Commonwealth Edison Company dated April 14, 1972, reporting that during a startup test on Quad Cities Unit #1, the unit failed to operate because of high crankcase pressure. ig, 34 p(, y* - . Strt? pg, fl51), In Tj 2 I a- 'y r Q Gs !l Sincerely, I $ sstQ Ek \\' '7 * {kQ c g, . < yy .4 b4 / Donald J. Skovholt Assistant Director for Reactor Operations Division of Reactor Licensing i

Enclosures:

As stated ._., e - P. O

t. ' :.]

&P gg%w e g 8707100110 870610 PDR FOIA THOMASB7-40 PDR

A: /0A y 1 . w. OFFICIAL USE ONLY 4 -- 6 % gg. SUPPLEMENT No. 154 CATEGORY B l l Quad Cities 1 HMH 6 ACRS Water Hammer June 7, 1972 By letter dated 4/11/72 Coranonwealth Edison reported damage to the RHRS seismic restraints and pipe hangers, attributed to water hausser due to improper venting. Analysis and selected dye checks indicate obe over-stressing and no weld damage. The restraints and hangers were repaired (with the advice of Sargent and Lundy) by GE and the filling and venting procedure was changed to eliminate the water hamer. No ACRS action is recomended. The enclosed material may be discarded after your review. 1 Diesel Failure Br WX dated 4/14/72 Consmonwealth Edison reported the f ailure to start on test of the Unit I diesel because of high crank case pressure. The " swing" diesel was started imediately; Unit I was at hot standby at 910 psig. No other details are available. No ACRS action is recomended. The enclosed material may be discarded after your review. WL FILE: Quad Cities 1 Project File and Cat B File a OFFICIAL USE ONLY OrrlCE > h- - EURN AME > DATE > Form ALC41B gRn. 9-53) AFCM 0240 po .u-as-swH +4 m L .... _.... _}}