ML17252A507
| 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
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UNITED STATES ATOMIC ENERGY COMMISSION DIRECTORATE OF REGULATORY OPERATIONS.
REGION Ill 799 ROOSEVELT ROAD GLEN ELLYN, ILLINOIS~_ ~0~_37 _:__ _.. _
TELEPHONE
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A.
RO Inspection Report Transmittal Date Distribution:
RO Chief, FS&EB RO:HQ (5)
DR Central Files Regulatory Standards Licensiµg (13)
RO Files B.
RO Inquiry Report No.
Transmittal Date Distribution:
RO Chief, FS&EB RO:HQ (5)
DR Central Files Regulatory Standards Licensing (13)
- RO Files No.
(3)
(3)
Distribution:
I L:D/D for Fuels & Materials DR Central Files RO Files Distribution:
RO Chief, FS&EB RO:HQ DR Central Files RO Files C.
Incident Notification From: Commonwealth Edison Co.
Docket No. 50-249 (Licensee & Docket No. (or License No.)
Transmittal Date Distribution:
RO Chief, FS&EB RO:HQ (4)
Licensing (4)
DR Central Files RO Files
- August 14, 1974 Distribution:
- RO Chief, FS&EB RO:HQ (4)
L:D/D for Fuels & Materials DR Central Files RO Files
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REGIONAL DIHECTO~
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"'"'*1 DIREC!O~IATE REGULATO~Y OPEriATlONS REG ION 3 wUX US ATOMIC *2~E~G~ COhWlSSJO~
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~LLY~ lL 60137 ATTEMPTS TO DELIVER.
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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~
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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 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 B s SlEPH~~so~ SU~T !~
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~UCL EAR POW £it STAT 10 r~
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_ ~MORR-IS, --I-U.- - - * -
TO:
J. F. O'LEARY AUGUST 8,1974
- --. - -50.. 249- --- --
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