ML20238A736
| ML20238A736 | |
| Person / Time | |
|---|---|
| Site: | Oyster Creek |
| Issue date: | 08/14/1987 |
| From: | Fiedler P GENERAL PUBLIC UTILITIES CORP. |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| TASK-02-03.B, TASK-03-04.A, TASK-2-3.B, TASK-3-4.A, TASK-RR NUDOCS 8708210068 | |
| Download: ML20238A736 (2) | |
Text
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i GPU Nuclear
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gf 100 Interpace Parkway Parsippany, New Jersey 07054 201 263-6500 TELEX 136 482 Writer's Direct Dial Number:
August 14, 1987 i
U.S. Nuclear Regulatory Commission Attention:
Document Control Desk Washington, D.C.
20555 Gentlemen:
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Subject:
Oyster Creek Nuclear Generating Station Docket No. 50-219 Systematic Evaluation Program (SEP) Topics 11-3B, " Flooding Potential and Protection Requirements" III-4A, " Tornado Missiles" During the integrated assessment of the subject topics, the NRC staff Stated that although there are multiple sources of water supply system (e.g., Condensate Storage Tank, Torus Water Storage Tank, Service Water &
Emergency Service Water Pumps, etc.) on which Oyster Creek can rely to l
accomplish a safe shutdown, they are not protected f rom tornado missiles
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and/or external flooding.
l GPUN agreed to provide a protected water supply and associated components to ensure a safe shutdown and to provide procedures that specify the conditions for and use of the components.
l GPUN letter dated July 3,1985 f rom P. B. Fiedler to J. A. Zwolinski transmitted a proposed resolution by utilizing a main Core Spray pump to supply the Isolation Condenser via a temporary hose. Both the water supply (suppression chamber) and the components described above would be l
protected by the potential tornado missiles and external flooding.
l Recently, through a detailed field walkdown and line loss analysis of an l
existing system interconnection between Core Spray and Condensate &
Demineralized Water Transfer Systems, it was determined that the existing plant configuration is capable of supplying make-up water to the Isolation Condenser and is, therefore, sufficient to address the Staff's concern.
The water supply for the interconnection will still be the suppression chamber (torus).
Both the water supply and the interconnection are located in the Reactor Building below 119'-3" elevation which is protected f rom tornado missiles or external flooding.
An engineering analysis has determined that system flow rate utilizing the existing interconnection described above will exceed Isolation Condenser heat removal needs.
In addition, a safety evaluation has been performed in accordance with 10 CFR 50.59 to assure that the concerns of the subject SEP topics are adeouately addressed.
8708210068 870014 i
PDR ADOCK 05000219 Of P
PDR GPU Nuclear is a part of the General Public Utilities System
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.. GPUN is in the process of upgrading the applicable plant Emergency Operating Procedures (E0P's) to reflect the method described above to achieve a sate shutdown if external sources of water are lost due to flooding or tornado hazards.
j In the event that any comments or auestions arise, please contact M.
Laggart, Manager, BWR Licensing (201 263-6205) of my staff.
Very truly yours, j
l
,ddJAtu P.
. ~iedler Vice President and Director Oyster Creek j
d
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l PBF/YN/pa(50859) cc: Mr. William T. Russell, Administrator l
Region I j
U.S. Nuclear Regulatory Commission j
631 Park Avenue King of Prussia, PA.
19406 l
NRC Resident Inspector 1
Oyster Creek Nuclear Generating Station J
Forked River, N.J.
08731 Mr. Alex Dromerick, Jr.
U.S. Nuclear Regulatory Commission 7920 Norfolk Avenue j
Phillips Building, Mail Stop 314 l
Bethesda, Maryland 20014 j
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