ML19253C114
| ML19253C114 | |
| Person / Time | |
|---|---|
| Site: | Oyster Creek |
| Issue date: | 11/15/1979 |
| From: | Ziemann D Office of Nuclear Reactor Regulation |
| To: | Finfrock T JERSEY CENTRAL POWER & LIGHT CO. |
| References | |
| NUDOCS 7911300002 | |
| Download: ML19253C114 (3) | |
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UNITED STATES E
NUCLEAR REGULATORY COMMISSION g
g C
WASHINGTON, D. C. 20555
% *... p' November 15, 1979 Docket No. 50-219 Mr. I. R. Finfrock, Jr.
Vice President - Generation Jersey Central Power & Light Company Madison Avenue at Punch Bow 1 Road Morristown, New Jersey 07960
Dear Mr. Finfrock:
We have reviewed your letter of September 24, 1979, concerning a Technical Saecification change request to allow torus draining with fuel in the reactor vessel. We find that additional information is needed before we can complete our review.
Please provide the information requested in the enclosure within two weeks so that we may process your request prior to your scheduled refueling outage.
Sincerely, v)
Dennis L. Ziemann, Chief Operating Reactors Branch #2 j
Division of Operating Reactors
Enclosure:
Request for Additional Information - Torus Draining cc w/ enclosure:
See next page 1442 063 7 9118 00 DD2
Mr. I. R. Finfrock, Jr. November 15, 1979 cc w/ enclosure:
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 1442 064
ENCLOSURE 1.
Why is the torus to be drained, for how long will it remain empty, and hgw often wil'1 such draining take place?
2.
What safety limit on vessel water level do you propose during periods when the torus is drained?
3.
Describe the circumstances including operator errors, equipment failures, pipe breaks, seismic events, etc., which could result in a loss of vessel inventory during the period for which the torus will be empty.
4.
For the most rapid rate of inventory loss identified in the response to Question 3, describe how'it will be assured that the vessel water level will not fall below the safety limit. Your response should include con-sideration of:
(a) systems to detect low water level and initiate automatic or manual response and set points for such initiations (b) specific systems and piping runs and valves to deliver makeup inventory, and a comparison of the makeup rate to the rate of inventory loss (c) time required for pumps to attain full capacity, for operators to perform manual functions etc.
(d) an evaluation of the minimum vessel level during the event.
5.
What are the seismic and electrical qualifications of the systems you have specified to mitigate vessel inventory losses while the torus is drained?
6.
What does the phrase "and the torus is mechanically intact" in 3.4.A.10.d mean?
7.
How do you distinguish between work which could drain the vessel to below the level "4'8" above the top of the active fuel" and other work which would not result in such a draining? Why not prohibit all work which could have a potential for draining the vessel to any level?
8.
Explain more fully the implications of the " note" on page 3.4-lb.
9.
Has a special procedure been written to guide operators through the mitigation of a vessel draining event with the torus drained?
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