ML19210C564
| ML19210C564 | |
| Person / Time | |
|---|---|
| Site: | Maine Yankee |
| Issue date: | 11/05/1979 |
| From: | Reid R Office of Nuclear Reactor Regulation |
| To: | Groce R Maine Yankee |
| References | |
| NUDOCS 7911190119 | |
| Download: ML19210C564 (3) | |
Text
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,(. p* *sc,[o, ue UNITED STATES NUCLEAR REGULATORY COMMISSION
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November 5, 1979
. Docket No. 50-309 Mr. Robert H. Groce Licensing Engineer Maine Yankee Atomic Power Company 20 Turnpike Road Westboro, Massachusetts 01581
Dear Mr. Groce:
We have reviewed your submittal of December 29, 1978, which was supplemented by a telephone discussion on October 19, 1979, regarding the containment purge and vent system at Maine Yankee Atomic Power Plant.
We have determined that the additional information identified in the enclosure is necessary to continue our review.
Please provide this information within 30 days of receipt of this letter.
Sincerely, Wh f Robert W. Reid, Chief Operating Reactors Branch #4 Division of Operating Reactors
Enclosure:
Request for Additional Information 354 153 cc w/ enclosure:
See next page 7911190 //7 f
Yankee Atomic Electric Company CC:
E. W. Thurlow, President Mr. Robert R. Radcliffe flaine Yankee Atomic ' Power Company Office of Energy Resources 9 Green Street 55 Capitol Street Augusta, thine 04330 Augusta, Maine 04330 fir. Donald E. Vandenburgh Vice President - Engineering Yankee Atomic Electric Company 20 Turnpike Road Westboro, flassachusetts 01581 John A. Ritsher, Esquire Ropes and Gray 225 Franklin Street Boston, Massachusetts 02110 f1r. John 11. R. Paterson
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Assistant Attorney General State of Maine Augusta, Maine 04330 Mr. Nicholas Barth Executive Director Sheepscot Valley Conservation Association, Inc.
P. O. Box 125 Alna, Maine 04535 Wiscasset Public Library Association High Street Wiscasset, riaine 04578
'Mrs. L. Patricia Doyle, President SAFE POWER FOR MAINE Post Office Box 774 Camden,riaine 04843 i35s4 154 k
Enclosure REQUEST FOR ADDITIONAL INFORMATION FO'R. CONTAINMENT PURGE SYSTEM AND
' CONTAINMENT VENTING SYSTEM FOR MAINE YANKEE ATOMIC POWER PLANT DOCKET NO. 50-309 1.
Provide a schematic drawing of your containment purge and vent system.
2.
With regard to the containmen.t purge and venting system, provide the following information:
Discuss the provisions made to ensure that isolation valve a.
closure will not be prevented by debris which could poten-tially become entrained in the escaping air and steam.
b.
Discuss the provisions made for testing the availability of the isolation function and the leakage rate of the isolation valves, individually, during reactor operation.
Provide an analysis to demonstrate the acceptability of the c.
provisions made to protection structures and safety-related equipment; e.g., fans, filters, and ductwork, located beyond the purge system isolation valve against loss of function
~
from the environment created by the escaping air and steam.
d.
For the containment purge isolation valves, specify the differential pressure across the valve for which the maximum leak rate occurs.
Provide test results (e.g., from vendor tests of leakage rate versus valve differential pressure) which support the above data.
3.
As discussed with your staff (telecon J. Kerrigan and R. Turcott, 10/19/79), the following information should also be provided:
Provide an analysis of the reduction in the containment -
a.
pressure resulting from the partial loss of containment atmosphere during the accident for ECCS backpressure deter-mination.
b.
Quantify the amount of containment atmosphere released through the purge and vent isolation valves during the maximum closure time allowed in your Technical Specifications.
1354 155 o
.