PNO-I-93-043, on 930823,located Steam Leak from First Stage High Pressure Turbine Extraction Steam Line.Caused by Valve Body Crack.Shutdown Unit to Mode 2 to Initiate Repairs
| ML20024H892 | |
| Person / Time | |
|---|---|
| Site: | Haddam Neck File:Connecticut Yankee Atomic Power Co icon.png |
| Issue date: | 08/23/1993 |
| From: | Blough R, Doerflein L, Raymond W NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | |
| References | |
| PNO-I-93-043, PNO-I-93-43, NUDOCS 9308270137 | |
| Download: ML20024H892 (2) | |
DCS No: 50213930823 Date: August 23, 1993 i
-PREUMINdRY NOTIFICATION OF EVEN1 UNUSUAL OCCURRENCE PN1-9343 9
i This preliminary notification constitutes EARLY notice of events of POSSIBLE safety or public interest significance. The information is as initially received without verification or evaluation, and is basically all that is know n by the Region I staff on this date.
Facility:
Licensee Emergency Classification:
IIaddam Neck Notification of Unusual Event Connecticut Yankee Atomic Power Co.
Alert P. O. Box 270 Site Area Emergency Ilanford, Connecticut 06141-0270 Genem! Emergency X
Not Applicable Docket o.
50-213 N
License No.
DPR-61 Event No.
25682,25701,25706 Event Location Code: POW
SUBJECT:
UNPLANNED SHUTDOWN GREATER THAN 48 HOURS On August 23,1993, at approximately 9:00 a.m., the licensee identified a small steam leak from the t
first stage high pressure turbine extraction steam line. The steam leak was located in the turbine building and did not affect any adjacent equipment in the area. Once the lagging was removed, the leak was subsequently found to be from a crack on a non-safety grade 14" Cmsby gate valve (MS-V-560) body. The licensee determined that the valve body crack was appmximately 1/2 inch long. At approximately 10:30 a.m., the licensee decided to shutdown the unit to Mode 2 to isolate and initiate repairs to valve MS-V-560. As of 1:00 p.m., the unit was at 45% mted thermal power. The licensee replaced this extraction steam valve with a refurbished valve during the recent refueling outage (May-July,1993).
The outage is expected to last four days. Major outage activities include repairs to valve MS-V-560 and other miscellaneous valve packing leaks-The licensee notified the NRC Operations Center at 12:17 p m. The licensee did not issue a press release, however, they responded to media inquiries. The Region I Public Affairs Office is prepared to respond to media inquiries. The State of Connecticut has been notified.
This notification is current as of 3:00 p.m. on August 23,1993.
CONTACT:
W. Raymond L. Doerflein R. Blough (203) 267-2571 (215) 337-5378 (215) 337-52?4 i
y-9308270137 930823
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_. _ _ _ _ _ _ _ _ _ _ _ - _ _ _ _ _ _ _ _ _ _ _ _ _ _ DCS No: 50213930823 4
Date: August 23,1993 PRELIMINhRY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE PN1-9343 DISTRIBlTTION:
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- (Rev. August 1993) i l
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