ML19254E395
| ML19254E395 | |
| Person / Time | |
|---|---|
| Site: | Maine Yankee |
| Issue date: | 09/26/1979 |
| From: | Wood E Maine Yankee |
| To: | |
| References | |
| NUDOCS 7911010029 | |
| Download: ML19254E395 (1) | |
Text
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w MAME'* ;UAWlEE Meml0Por!ERCOMPARUe Box 150, HFD 2 Wiscasset, Maine 01578 p.
%wo September 26, 1979 United States Nuclear Regulatory Commission Directorate of Regulatory Operations Region I 631 Park Avenue King of Prussia, Pennsylvaria 19406
Reference:
License No. DPR-36 (Docket No. 50-309)
Dear Sir:
Pursuant to the requirements of Technical Specification 5.9.1.6, The Maine Yankee Atomic Power Company hereby subnits the following report.
During preparations to cornence a normal plant heatup following a scheduled maintenance outage, the Residual Heat Renoval (RHR) system was secured prior to increasing steam generator water levels to above the L.?
of the tube bundles.
Technical Specification 3.8 requires the RilR system to be in operation unless one or more steam generators are operable for core decay heat removal.
At the time of the incident the water level in all three steam generators was 300 inches. The requirements for a steam generator to be operable includes having the water level above the top of the tube bundle which is 346".
All other conditions for an operable steam generator were in effect.
Additionally, feedwater flow to the steam generators was available at all times.
The discrepancy was discovered less than six hours following the securing the of the RllR system and steam generator levels were irnediately raised to normal operating level.
Because all three steam generators contained 300 inches of water and feed-water flow was continuously availabic during the incident, a heat sink for core decay heat removal was continuously available.
For these reasons there was no significant effect upon the public health or safety.
Very truly yours, MAINE YANKEE ATOMIC POWER COMPANY h
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Edwin C. Wood Plant Manager 7911010 02.9 ECN/lcw