ML19326E065
| ML19326E065 | |
| Person / Time | |
|---|---|
| Site: | Haddam Neck File:Connecticut Yankee Atomic Power Co icon.png |
| Issue date: | 07/21/1980 |
| From: | Graves R CONNECTICUT YANKEE ATOMIC POWER CO. |
| To: | |
| References | |
| NUDOCS 8007250535 | |
| Download: ML19326E065 (2) | |
Text
O CONNECTICUT YANKEE ATOMIC POWER COMPANY Y[rfY\\
~
HADD/ M NECK PLANT E
RR = 1. BOX 127E. EAST H AMF *ON. CONN. 06424 s
July 21, 1980 U. S. Nuclear Regulatory Cocu:lission Region 1 Office of Inspection and Enforcement 631 Park Avenue King of Prussia, Pennsylvania 19406 Attn:
}k. Boyce Grier, Director
Reference:
Facility Operating License No. DPR-61 Docket No. 50-213 Informational Report
Dear Mr. Grier:
In accordance with the requirements of Connecticut Yankee Emergency Plan, the following informational report concerning an Unusual Event the Haddam Neck Plant is hereby submitted.
at On July 17, 1980, during an investigation of reactor coolant pump seal water flev problems, the #2. seal water supply bypass valve failed and allowed full flow through this valve, thus increasing flow to the
- 2 reactor coolant pump seals.
The valve was clamped closed to reduce flow to the i!2 pump seal assembly.
Leakage from the pump seals is directed to the reactor containment sump for collection and pumping to radwaste tanks.
At 2040 a water balance inventory calculation cenfined that the combined reactor coolant system leakrate was 13 gpm.
Plant Technical Specifications require leakage to be reduced to less than 10 gpm within four hours or be in the cold shutdown mode within the following 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br />.
At 2126 a plant cooldown was commenced. At 2135 Federal, State and Local officials were notified of the Unusual Event classification and informed i
of the plant status.
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T The failed valve and other similar valves were replac'ed while the plant was in - the cold shutdoun mode.
Further details will be included in the 1
required 30 day-report.
1 Very truly yours, i
Richard H. Graves Station Superintendent RHG/jhb USNRC c/o Document Management Branch, Washington, D. C.
(1) cc:
Stata Department of Environmental Protection, Hartford, CT J. F. Opeka t
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