ML19209A377
| ML19209A377 | |
| Person / Time | |
|---|---|
| Site: | Hatch  |
| Issue date: | 08/29/1979 |
| From: | Gammill W Office of Nuclear Reactor Regulation |
| To: | Whitmer C GEORGIA POWER CO. |
| References | |
| NUDOCS 7910030676 | |
| Download: ML19209A377 (3) | |
Text
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, c( [ g NUCLEAR REGULATORY COMMISSION 5 " [0 cj. 5 E
WASHINGTON, D. C. 20555 August 29, 1979 Docket No. 50-366 Mr. Charles F. Wnitmer Vice President - Engineering Georgia Power Company P. O. Box 4545 Atlanta, Georgia 30302
Dear N. Whitmer:
By your letter dated July 27, 1979 you requested a change to the Technical Specifications appended to Operating License No. NPF-5 for the Edwin I.
Hatch Unit No. 2 (HNP-2). The proposal related to Specification 3.6.4.1 and requested that continued operation be pemitted until the next COLD SHUTD0tlN with up to three suppression chamber-drywell vacuum breakers inoperable for opening but known to be in the closed position.
We have reviewed your submittal and detemined that your request cannot be approved based on the infomation available to the staff.
The basis for our decision is detailed below.
Vacuen in the drywell is relieved by 12 vacuum breakers between the drywell and the suppression chamber. As stated in the HNP-2 FSAR (Section 6.2.1.2.1.6.1) the vacuum relief capacity should be no less than one six-teenth of the total main vent cross sectional areas. Accordingly, the FSAR supports continued operation with 9 operable valves and 3 inoperable valves which are known to be closed.
Therefore, the current specifications authorize continued operation under these conditions and do not require initiaticn of reactor shutdown to effect repairs of the inoperable valves.
We believe that the inoperable valves should be repaired at the earliest opportunity so that a failure of a single active component can be tolerated without compromising the relief capacity. This earliest opportunity without requiring the initiation of reactor shutdown is at the next HOT SHUTDOWN of the reactor.
Before restart of the reactor fron HOT SHUTDOWN, we believe that the inoperable valves should be repaired to provide added vacuum relief capacity.
Your request stated that maintenance on inoperable vaccan breakers cannot be perfcmed safely in the HOT SHUTDOWN condition.
We have reviewed your
- ustification. The specifications as currently authorized cemit going fron HOT SHUTD0l!N to COLD SHUTD0tlN to r
- ake necessary repairs.
We believe tnis to be more prudent than to pemit startup froc HOT SHUTDOWN with three inoperable valves, which could be possible if we were to approve your recuest.
}Ohk 7910080 [g
Mr. Charles F. Whitmer August 29, 1979 In view of the above, your request is denied. We have discussed this position with members of your staff.
Si ncerely, b_ /,f cwww Willian P. Gamnill, Acting Assistant Director for Operating Reactors Projects Division of Operating Reactors cc:
See page 3 1091 302
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Mr. Charles F. Whitmer August 29, 1979 Georgia Power Company
-3 cc:
G. F. Trowbridge, Esquire Shaw, Pittman, Potts and Trowbridge 1800 M Street, N. W.
Washington, D. C.
20036 Ruble A. Thomas Vice President P. O. Box 2625 Southern Services, Inc.
Birmingham, Alabama 35202 Mr. Harry Majors Southern Services, Inc.
300 Office Park Birmingham, Alabama 35202 Mr. William Widner Georgia Power Company Power Generation Department P. O. Box 4545 Atlanta, Georgia 30302 Mr. L. T. Gucwa Georgia Power Company Engineering Department P. O. Box 4545 Atlanta, Georgia 30302 Appling County Public Library Parker Street Baxley, Georgia 31413 Mr. R. F. Rogers U. S. Nuclear Regulatory Commission P. O. Box 710 Baxley, Georgia 31513
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