ML17252B034

Letter Confirming a 05/16/1974 Conversation Concerning the Discovery of Leakage Past the 1B Main Steam Line Isolation Valve in Excess of Technical Specifications - Dresden Unit 3

ML17252B034
Person / Time
Site:	Dresden
Issue date:	06/05/1974
From:	Stephenson B Commonwealth Edison Co
To:	James Keppler US Atomic Energy Commission (AEC)
References
Download: ML17252B034 (2)

Text

UNITED STATES ATOMIC ENERGY COMMISSION DIRECTORATE OF REGULATORY OPERATIONS REGION tU.

799 ROOSEVELT ROAD TELEPHONE GLEN ELLYN, ILLINOIS 60137 (3 I Z) BSB-Z660 A. RO Inspection Report No.*

Transmittal Date Distribution: Distribution:

RO Chief, FS.&:EB~* RO... C.h:i.ef,, FS&EB RO:HQ (5) RO:HQ (4)

DR Central Files L:D/D for Fuels & Materials Regulatory Standard~ (3) DR Cen.tral Files

~ Licensing (13) RO Files RO Files B. RO Inquiry Report No.

Transmittal Date Distribution: Distribution:

1 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 June 5, 1974 Distribution: Distribution:

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

Licensing (4) L :D/D for Fl'.els & Materials DR Central Files DR Central Files RO Files RO Files

. i

• .i*T'~

LINE ISOLATION VALVE IN EXCESS OF THE SU~VIELANCE REQUIREMENTS GIVEN IN SECTION 4.7 OF TH~ TECHNICAL SPECFICAIIONS THE LEAKAGE MEASURED WAS 24.8 SCF AT 25 PSIG. AL.~ OTHER MAIN STEA~1 ISOLATION VALVES HAD LEAK RATE LESS THAN "TAG 11.5 FCF

{

'--* .* SF-1201 (R5-69)

(

AT 25 PSIG MAXIMUM ALLOWABLE 8 B STE PH E NSO N

l. SUPERINTENDENT DRESDEN NUCLEAR POWER STATION C.* C0~1MO~JWEALTH EDISON COMPANY RT 1 fYDRRIS IL c NNNN c

. MAY 2 0 1974

(~ SF-1201 (R5-69)