ML17252A507

Letter Confirming a 08/08/1974 Conversation Concerning a Failure of the Solenoid Operated Isolation Valve Associated with the 3B Traversing Encore Probe to Close - Dresden Unit 3

ML17252A507
Person / Time
Site:	Dresden
Issue date:	08/14/1974
From:	Stephenson B Commonwealth Edison Co
To:	James Keppler US Atomic Energy Commission (AEC)
References
Download: ML17252A507 (3)

Text

UNITED STATES ATOMIC ENERGY COMMISSION DIRECTORATE OF REGULATORY OPERATIONS.

REGION Ill 799 ROOSEVELT ROAD TELEPHONE GLEN ELLYN, ILLINOIS~_ ~0~_37 _:__ _ .. _ -- * ** *(31Z)85a:;;2660 ---*.

A. RO Inspection Report No.

Transmittal Date Distribution: Distribution:

RO Chief, FS&EB RO Chief, FS&EB RO:HQ (5) RO :HQ (4) I DR Central Files L:D/D for Fuels & Materials Regulatory Standards (3) DR Central Files Licensiµg (13) RO Files RO Files B. RO Inquiry Report No.

Transmittal Date Distribution: Distribution:

RO Chief, FS&EB RO Chief, FS&EB RO:HQ (5) RO:HQ DR Central Files DR Central Files Regulatory Standards (3) RO Files Licensing (13)

• RO Files C. Incident Notification From: Commonwealth Edison Co. Docket No. 50-249 (Licensee & Docket No. (or License No.)

Transmittal Date  : August 14, 1974 Distribution: Distribution:

• RO Chief, FS&EB RO Chief, FS&EB RO:HQ (4) RO:HQ (4)

Licensing (4) L:D/D for Fuels & Materials DR Central Files DR Central Files RO Files RO Files

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01356 TDVE MORRIS IL 127 b-5 343P CDT *TELEPHONE NBR;-W- 2._5:?- -1.l~

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REGIONAL DIHECTO~ DATE nLo_:~*..::L~ __ TIME '~ '\ \~ \:>. "'"'*1

( DIREC!O~IATE REGULATO~Y OPEriATlONS ATTEMPTS TO DELIVER.

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1~9 ROOSEVELT RD GLEN ~LLY~ lL 60137

SUBJECT:

. DPR-25, DHESDEN ~UCLEAri POWE~ STAtlO~ U~IT 3 \

THIS WILL CO~FIA~ A CO~VEHSATION WITM F MAU~A OF YOUA OFFICE AT 1415 riGJ~S ThIS DATE CO~Cik~l~G A FAILUn£ 10 CLOSE OF THE ~OLE~OID OPERAT~D bALL 'ISOLATIO~

C sF- 1201 <R'UJ.V:C: ASS.OICATED vilTl-i The: 3t Trc;:di.::f\Sli'-G i::i'ICOKi PnOoi ON 8-7-74 AT 1910 *r!OUf<S FOLLOWHiG COi"i?LL.TlON OF Al'"

(. AP?.i'i CALP.B?.ATIOi\ Tti:C. 3t. oAi:..L VALV'i. FAILED TO Ci..OSi AS IT SHOULD AFT~R TH:t. DETECTO~ WAS WIThD~AW~ l~TO THE S~IiLD

( MAINTENANCE 15 Pf<ESE~TLY I~VESTIGATl~G TMi FAlLUhi T~E MA~UALLY ACTUATED SriEA~ VALVE l~ SEriliS ~ITH ThE FAILiJ SALL VALVE RiNAI~S AVAl~AELE FO~ lSULATlO~. IF KE~Ulri~D c

ADD IT ION AL DETAILS . Ai'<D COiti\ECT I VE ACT HJl'I vilLL bi.

FORTHCOMl~G I~ IhE FO~ ~OF A 10 GAY LiTTi~ I~ ACCOriDANC£ WITH ~EGULATORY GUIDE 1.16

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Dfi_ESDEi'- ~UCL EAR POW £it STAT 10 r~

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c SF-1201 (~~=ii1IS IL 60450

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-- - -- . - -50 .. 249- --- --

_~MORR-IS, --I-U .- - - * -

TO: J. F. O'LEARY AUGUST 8,1974 DPR-25, DRESDEN NUCLEAR POWER STATION, UNIT 3 THIS WILL CONFIRM A CONVERSATION WITH F.MAURA OF THIS OFFICE AT 1415 HOURS. THIS DATE CONCERNING A FAILURE TO CLOSE SOLENOID OPERATED* BALL ISOLATED VALVE ASSOCIATED WITH THE 3B TRANSVERSING ONCORE PROBE ON. 8/7/7,4 THE 1910 HOURS FOLLOWING COMPLETION OF THE APRM CALIBRATION -. THE 3B BALL VALVE FAILED TO CLOSE AS IT SHOULD AFTER

• THE DETECTOR WAS WITHDRAWN INTO THE SHIELD MAINTENANCE*IS PRESENTLY INVESTIGATING THE FAILURE OF THE MANUALLY AC'rl.JATED SHEAR VALVE IN SERIES WITH THE FAILED BALL VALVE REMAINS AVAILABLE FOR ISOLATION. AS REQUIRED ADDITIONAL DETAILS AND CORRECTIVE ACTION WILL BE FORTH COMING IN THE FORM OF A 10 DAY LETTER IN ACCORDANCE WITH REG GUIDE 1.16 B.B.STEPHENSON SUPERINTENDENT .*

DRESDEN NUCLEAR POWER STATION * .

. COMMONWEALTH EDISON COMPANY RURAL ROUTE 1 MORRIS, ILL. 60450