ML19210C544
| ML19210C544 | |
| Person / Time | |
|---|---|
| Site: | Oyster Creek |
| Issue date: | 10/24/1979 |
| From: | Nowicki S Office of Nuclear Reactor Regulation |
| To: | JERSEY CENTRAL POWER & LIGHT CO. |
| References | |
| NUDOCS 7911190062 | |
| Download: ML19210C544 (3) | |
Text
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h DOCKET N0. 50-219 DATE: October 24, 1979 LICENSEE: Jersey Central Power & Light Company FACILITY: Oyster Creek Nuclear Generating Station
SUBJECT:
TELEPHONE CONFERENCE CALL CONCERNING ITEM 2 0F I&E BULLETIN 79-08 A conference call between N. Wagner and S. Nowicki of the NRC and J. Knubel and E. Growney of JCPL was made on October 11, 1979, to discuss N. Wagner's questions concerning Item 2 of I&E Bulletin 79-08. The questions and the responses are summarized below:
1.
Is it necessary to check that the mode switch for the Containment Ventilation is in run condition on Containment Isolation Signal or on reset?
Answer The Containment Ventilation Mode Switch does not reset upon isolation signal or reset of the isolation signal.
It is a key lock switch in the control room and can be used to bypass either the drywell or the torus and will not operate unless the reactor is out of the run mode.
The switch may be required to be operated in the post accident condition for gas control.
2.
Is the reactor water clean up system required to be in use following Emergency Core Ccaling System actuation? Is the letdown line isolated on automatic Emergency Core Cooling System Actuation?
Answer The reactor water clean up system (letdown line) is used to maintain water level in the reactor vessel under certain conditions.
In particular, when the reactor coolant system is isolated and the control rod drive pumps are adding water to the vessel the letdown line is used to maintain a constant level.
3.
Is the shutdown cooling system part of the ECCS and does the SCS have to be isolated on an Emergency Core Cooling System Actuation signal?
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. Answer Tne SCS is not part of the ECCS and is nonnally isolated. This system is automatically isolated on double low water level and on primary coolant temperature above 3500 In the event of a LOCA, and temperatures below 3500F, the system will remain isolated until manual action is taken.
4.
Are the Torus vacuum breaker lines isolated and 'do they provide a path for loss of primary coolant.
Answer The Torus breaker lines do not provide a path for loss of primary coolant.
The valves open on low prer,sure inside of the torus relative to reactor building pressure and the flow is always from the reactor building into the torus.
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Stanley Nowicki, Project Manager Operating Reactors Branch #2 Division of Operating Reactors cc: See next page 1354 035
. cc G. F. Trowbridge, Esquire Shaw, Pittman, Potts and Trowbridge 1800 M Street, N. W.
Washington, D. C.
20036 GPU Service Corporation ATTN: Mr. E. G. Wallace Licensing Manager 260 Cherry Hill Road Parsippany, New Jersey 07054 Anthony Z. Roisman Natural Resources Defense Council 917 15th Street, N. W.
Washington, D. C.
20005 Steven P. Russo, Esquire 248 Washington Street P. O. Box 1060 Toms River, New Jersey 08753 Joseph W. Ferraro, Jr., Esquire Deputy Attorney General State of New Jersey Department of Law and Public Safety 1100 Raymond Boulevard Newark, New Jersey 07012 Ocean County Library Brick Township Branch 401 Chanbers Bridge Road Brick Town, New Jersey 08723 Mr. I. R. Finfrock, Jr.
Vice President - Generation Jersey Central Power & Light Canpany Madison Avenue at Punch Bowl Road Morristown, New Jersey 07960 1354 036