ML20084U695

Telecopy Ao:Weld Cracks Identified on Discharge Bypass Valve MO-1-0202-7 a & B.Final Analyses & Plans Incomplete.W/ Incomplete Ltr to J Eilberg Re AO & Similar Incident

ML20084U695
Person / Time
Site:	Quad Cities
Issue date:	01/10/1975
From:	Kalivianakis N COMMONWEALTH EDISON CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20084U697	List: ML20084U695
References
NJK-75-23, NUDOCS 8306290185
Download: ML20084U695 (3)

Text

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• Quad-Cities Noctest Power Station l PostOmcaBox 216

) Cordova.litmors 61242

Telephone 309/654 224r I

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ll NJK-75-23 . . . ...

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li j Teslecopy- Region- f il, Attention: Mr. C. FeIerabend i

J- Janua ry - 10, 1975- -

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! J.. Xeppler, Regional Director l Directorate of Regulatory Operations 3

Region. t il

U. S. Atomic Energy Commission

! 799 Roosevelt Road j G1ca: Ellyn, IIlinois 60337' ,

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! Reference r Quad-Cities Nuclear Power Station, Unit 1

Docket No. 50-25%, DPR-20

! Appendix. A. Sections 1.0. A.5. and 6.6,a.11 a.

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Dear Mr. Keppler:

! The purpose- of this letter is to provide you.with notification of an Ah- ,

! normal Occurrence as required, by Technical Spect fication. 6.6.8~.1.a within:.

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24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> of the occurrence .

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! WIthiquad-C1 ties Unit 1 in, the ColdsShutdown Condition-, weld. examinations l were conducted on the reactor recirculation discharge bypass lines. Two j weld- cracks were identified, at the Junction of each. of' the discharge.by-

pass valve. (M0-1-0202.~7 A&B) four-inch downstreme sections and the 28-

j inch discharge h4ader.- Two indications have been~ found at the junction i of the upstream four-inch; section and the 28 inch: line. Final.amelyses 6

and, plans are not complete

at this time..

I l This occurrence was discussed by" telephone with. Mr. Feierabend of your

! office on January- 10, 1975 Fur:ther infonnation wl1-1 be provided by Ah-l normal. Occurrence Report AO 50-254/75-3 which.will be..submi tted within. i

10. days of the date of this occurrence. i l

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Very- truly yours, I COMMONWEALTH' EDISON COMPANY j QUAD-ClTlES. NUCLEAR POWER STATION:

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J. Kalivianakis[

} N j Station Superintendent i

i NJK/LFG/lk.

k i cc: Directorate.of Licensing l J. S. Abei l 8306290185 751017

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3 " ^ DUCK 05000254 /h- h _ __ ___ _

/7 t/. s o o nu, y s :. l mmMFMfMamm DIRECTORATE OF REGULATORY OPERATIONS

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1+o . REGION III -h-

• f 5 d 799 ROOSEVELT ROAD p yrtgpwoug _

GLEN ELLYN. ILLINOIS 6o137 (312) 858-2660 o t h' , 2

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(/,/ 9 A. R0 Inspection Report No. i-Transmittal Date  : 4 Distribution: Distribution:

R0 Chief, FS&EB R0 Chief, FS&EB -f RO:HQ (5) RO:HQ (4) .-

DR Central Files L:D/D for Fuels & Materials s Regulatory Standards (3) DR Central Files ]

Licensing (13) RO Files i R0 Files -

e B. RO Inquiry Report No. Y I

Transmittal Date  :

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Distribution: Distribution:

R0 Chief, FS&EB R0 Chief, FS&EB [

RO:HQ (5) RO:HQ J DR Central Files DR Central Files 7 Regulatory Standards (3) R0 Files -

Licensing (13) i R0 Files ,

C. Incident Notification From: Commonwealth Edison Co., Docket No. 50-254 5 (Licensee & Docket No. (or License No.)

Transmittal Date  : bN '

a Distribution: Distribution: -

RO Chief,_FS&EB_ R0 Chief, FS&EB g RO:HQ (4) RO:HQ (4) 4 Licensing (4) L:D/D for Fuels & Materials i DR Central Files DR Central Files A R0 Files R0 Files

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- . T Honorable Joshua Eilberg , .

. J House of Representatives .

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Dear Mr. E11 berg. ,

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The following'181in reply to your letter of October 10,,1974, to . l Mr. Robert D., Ofjfeill'regarding cracks identified in auxiliary piping of ~. three bo.ilin.g water r. eac' tor facilities.; ,,3 a 0- --

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Aftercrackbwerefoundinmid-Septecher1974infour,relativelysmall-

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(4-inch diameter),bypans' links.,in r.e. act '

vater reactors in Illinois ~and a third,or. .c. o.olant' systems'at.two boi. ling

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in Connecticut, the AEC on e .-

g- Septe$ber 19 ' notified 'alfftiliti%h'aYin(one or.cora operhting. boiling' '^

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water reactors 'to czanine" these. bypass lines for evidence of cracks f '

within 60 days. AEC's notification covered _a total of 21 boiling water ~. >' '

g j reactors with AEC licenses authorizing their_ operation.. , .dt - y ,. ' t 9 , . . .r . .. .s ..

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I Fifteen of the facilities, including the three whero cracks.were found ' '

O initially, have similar bypass piping systems. As of October 18,'tvelva ,

of theso had coupleted detailed examinations of their bypass piping V

systems. No additional cracks have been , identified in the 4-inch bypass b lines.

The utility operator of one of.the facilities in this category , . c - -

reported to AEC that examination of their piping system had been conducted ? -

I in December 1973, and the plant had not yet commenced power operation.c.~ - ~

AEC has not required reexamination of this facility.3Theiremaining two " " '

I facilities plan' examinations of their piping systems 1974.

by.mid-Novemberj '

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Six additional' operating boiling' . water. reactors of e,arlier' design eitheru....

(( do not hive' the bypass" piping syste:s ofjoncern'or~haveja' markedly dif-2

[' forent piping configuration (generally ' smaller) from those where cracks

• have been identified. . AEC is ,not rcquiring an' examination of the piping .

systems of these facilities 'at this' time.n The utility operators of four .

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of these plants h'ave, however, notified the.AEC of plans to examine at , . - -

least portion's of their' piping ' systems'. ~

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The AEC Regulatory staff has been informed by' its licensecs, assisted

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by the Ceneral Electric Company and AEC's Argonne National Laboratory [] f{ h.[

that preliminary findings indicate stress-assisted corrosion, caused, V _ .-

the cracks identified in mid-September. However, the sources of the i d - - ,

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