ML20101S985
| ML20101S985 | |
| Person / Time | |
|---|---|
| Site: | Oyster Creek |
| Issue date: | 07/14/1992 |
| From: | J. J. Barton GENERAL PUBLIC UTILITIES CORP. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| C321-92-2192, NUDOCS 9207200181 | |
| Download: ML20101S985 (2) | |
Text
GPU Nuclear Corporation
~ Nuclear
"::== 388 Forked Rver, New Jersey 087310388 609 971 4000 Wnter's Direct Dist Nureber.
C321-92-2192 July 14,1992 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555
Dear Sir:
Subject:
Oyster Creek Nuclear Generating Station Docket No. 50-219 Response to Supplemental Safety Evaluation Report -
Station Blackout The subject Station Blackout (SBO) Supplemental Safety Evaluation Report (SSER) finds the GPU Nuclear (GPUN) response to the original SB0 SER acceptable, contingent upon GPUN resolving staff concerns related to loss of ventilation.
Specifically, the staff is requesting GPUN to establish:
1.
An administrative procedure to ensure that during normal
-operation the control room temperature does not exceed the control room temperature used in the heat-up analysis (75'F).
Additionally, GPU Nuclear should include a provision in tneir SB0 procedures, in accordance with NUMARC 87-00, to open the control room -cabinet doors within thirty (30) minutes following the onset of an SBO.
2.
A schedule for confirming the temperature effects due to heat generated from the inverters in the A & B battery room and other similar areas.
As a result of discussions between GPUN and the NRC, the following was agreed to during the-June 5,1992 telephone conversation for each of the above items, respectively:
1.
GPU Nuclear will-revise the original heat-up analysis, utilizing ao initial control room temperature of 80*F, since the control room is maintained at 75*
5"F.
This revised analysis will demonstrate that at the end of the first h:,ur
' the control room temperature is below 120*F.
This obviates the need to establish an administrative procedure ensuring that, during normal operation, the control room temperature does not exceed 75*F.
9207200181 920714 PDR ADOCK 05000219 P
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GPU Nuclear Corporation is a subsid,ary of General Pubhc Utaties Corporation
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j C321-92-2192 Page 2 The revision to the original heat-up analysis will also evaluate the sensitivity of the control roon temperature to higher outdoor and initial control room temperatures during the first hour following the onset of an SBO. The applicable control room heat loads to be used are those associated with an SB0 event. A control room temperature of less than 120"F at the end of the first hour following an SB0 event and based on an initial control room temperature of 90*F and a credible higher outdoor temperature would obviate the need to monitor temperatures in the control room during plant operation and open cabinet doors during an SB0 event.
2.
GPU Nuclear will complete the necessary reviews to confirm the temperature effects due to heat generated from the inverters in the A & B battery Room and other similar areas by the end of the next refueling outage.
With respect to item 1, above, reference to the end of the first hour following an SB0 event is made since, by then, the alternate AC source will be available to power up control room heating, ventilating and air conditioning.
The revisions to the heat-up analysis referred to above will be documented and, at the request of the NRC, be made available for review.
Very truly yours.
n
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Q hb Jo n J. Bar.op & Director ce Presid4Wt Oyster Creek JJB/EP:1ga cc: Administrator, Region 1 Senior NRC Resident In:,pector Oyster Creek NRC Project Manager
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