ML20041F161
| ML20041F161 | |
| Person / Time | |
|---|---|
| Site: | Oyster Creek |
| Issue date: | 03/10/1982 |
| From: | Fiedler P GENERAL PUBLIC UTILITIES CORP. |
| To: | Eisenhut D Office of Nuclear Reactor Regulation |
| References | |
| RTR-NUREG-0737, RTR-NUREG-737, TASK-2.K.3.46, TASK-TM NUDOCS 8203160244 | |
| Download: ML20041F161 (2) | |
Text
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GPU Nuclear NMCIMr P.O. Box 388 Forked River, New Jersey 08731 609-693-6000 Writer's Direct Dial Number:
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9-Mr. Darrell G. Eisenhut, Director p r'1 b jog g Division of Licensing 4 n tw y2
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Dear Sir:
Subject:
Oyster Creek Nuclear Generating Station Docket No. 50-219 NUREG 0737
Reference:
I.R. Finfrock Letter of July 9, 1980 to Mr. Darrell G. Eisenhut (*RC)
The purpose of this letter is to transmit to you our present status of NUREG Item II.K.3.46 "Michelson Concerns." he status of this item is as follows:
In our correspondence of July 9, 1980, we stated that the injection of Emergency Core Cooling (ECC) water into the core spray sparger and supply piping (which could potentially contain steam) was not felt to be a problem. Additionally, we stated that since this condition was not considered in the original design of the system, we intended to investigate the matter further. As you are aware, a new core spray sparger is planned for Oyster Creek.
The design of the new overhead grid core spray sparger system has taken water hammer effects into consideration. A water trap will be installed upstream of each sparger, outside the reactor vessel.
his will prevent cold water from entering the spargers during a vessel depressurization without core spray system actuation.
It will also prevent the formation of steam pockets in piping outside of the reactor vessel.
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Mr. Darrell G. Eisenhut Page 2 March 10, 1982 The new overhead grid core spray sparger system is constructed of heavier, more durable materials that are expected to withstand any of the above mentioned effects.
In addition, studies are in progress to determine the upper bound value of any pressure spikes that could occur during actuation.
This value will be used to demonstrate that the new overhead grid core spray sparger system will withstand any such forces.
If you should have any further questions on this issue, please contact Mr. James Knubel, Manager, BWR Licensing at (201) 299-2264.
.Very truly yours, WY =
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Peter B. Fiedler Vice-President & Director Oyster Creek PBF:JK:Ise cc: Ronald C. Haynes, Administrator Region I U.S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, PA 19406 NRC Resident Inspector Oyster Creek Nuclear Generating Station Forked River, NJ 08731
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