ML20236V348
| ML20236V348 | |
| Person / Time | |
|---|---|
| Site: | Quad Cities  |
| Issue date: | 08/18/1975 |
| From: | Jennifer Davis, Thornburg H, Warnick R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| To: | |
| References | |
| PN-75-072, PN-75-72, NUDOCS 9808030104 | |
| Download: ML20236V348 (1) | |
Text
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PRELIMINARY NOTIFICATION - NOT FOR PUBLIC DISCLOSUP2 (',
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l August 18, 1975 PPILIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE
--FN-75-72 r
This preliminary notification constitut.es EARLY notice of events of a
POSSIBLE safety or public interest significance. The information presented is as initially received without verification or evaluation and is basically all that is known by OIE staff as of 10:00 a.m. on the date of this notification.
IT SHOULD BE SPECIFICALLY NOTED THAT THIS NOTIFICATION MAY CONTAIN INFORMATION THAT LATER MAY BE DETERMINED TO BE INACCURATE OR INCONSISTENT. AN OFFICE OF INSPECTION AND ENFORCEMENT NOTIFICATION OF AN INCIDENT OR OCCURRENCE _(BLUE SHEET) SUBSEQUENTLY KILL BE ISSUED IF WARRANTED.
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--Fa cility : Quad-Cities Unit 2 Cor:monwealth Edison Company
Subject:
PIPE BREAK AT 6 INCH FEEDWATER VALVE The Commonwealth Edison Company notified the Chicago Regional Office of Inspection and Enforcement on August 17, 1975, at 9:45 p.m. that a pipe break occurred on the down stream side of the 6 inch feedwater flow control valve in the turbine building.
The break occurred due to a feedwater flow transient while' the plant
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-was operating at approximately 160 MWe during a plant startup. The unit was immediately scrammed and ti;e affected section was isolated promptly.
The licensee estimates that approximately 5000 gallons of water were released from the system. Some of the water leaked from the turbine building through a closed door, but none of the water left the site boundaries.
This is the second pipe break that has occurred in this location. The first break occurred on June 10, 1974, and was traced to the wall thickness being less than design due to valve rework.
Inspectors from the Chicago Regional Office have been dispatched to the site.
OIE received notification of the occurrence by telephone from N. Kalivianakis, the station surerinten.ent at 9:45 p.m. on August 17, 1975.
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Contact:
RFWarnick, IE x7261 HDThornburg, IE x7353 JGDavis, IE x7541 m
O Dis tribtftTon:
b Chairman Anders Commissioner Mason S. J. Chilk, SECY f$
Co=missioner Gilinsky Commissioner Rowden G. F. Murphy, JCAE I
g Co=missioner Kennedy C. C. Kammerer, CA ni L. V. Gossick, EDO D. F. Knuth, IE J. A. Harris, PA f
B. C. Rusche, NRR H. H. Brown, ISP T. J. McTiernan, AIA g y K. R. Chapman, NMSS o o.a.
H. K. Shapar, ELD l,.,
j Transmitted: P Bldg /430~ ; E St//J 7e.;
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t' d PRELIMINARY NOTIFICATION - NOT FOR PUBLIC DISCLOSURE l
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