ML20154H927
| ML20154H927 | |
| Person / Time | |
|---|---|
| Site: | Oyster Creek |
| Issue date: | 05/16/1988 |
| From: | Fitzpatrick E GENERAL PUBLIC UTILITIES CORP. |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| NUDOCS 8805260117 | |
| Download: ML20154H927 (2) | |
Text
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GPU Nuclear Corporation d, Nuclear
- ==:r388 Forked River.New Jersey 087310388 609 971-4000 Writer's Direct Dial Number:
May 16, 1988 U.S.
Nuclear Regulatory Commission Attention: Document Control Desk washington, DC 20555
Dear Sir:
Subject:
Oyster Creek Nuclear Generating Station Docket No. 50-219 IE Inspection No. 50-219/88-02 Pequest for Additional Information IE Inspection Report 88-02 requested additional information related to the reactor building low temperature conditions which occurred on January 6, 1988.
To date GPUN has responded to the Notice of Violation, included in the subject inspection report, and has submitted a Licensee Event Report both of which address the immediate actions taken as well as actions taken to prevent recurrence.
The following discussion provides amplification with regard to the actions already taken and also provides further details on actions currently in progress.
Following the occurrence of this event, GPUN took immediate actions to raise reactor building temperature.
Temperature surveys were taken to assure building temperatures had returned to proper levels.
GPUN's analysis of this event concludes the treezing temperatures experienced in the lower level of the shutdown cooling area were of a very localized nature and did not extend to other creas of the reactor building.
Temperature surveys made during the event did not identify any other areas in which freezing temperatures were present.
Based on a review of operational parameters and observation of plant equipment, no damage, other than that to the instruments in the shutdown cooling area, was found.
Engineering analysis of the temperatures experienced concluded that no structural damage occurred since the low temperature conditions existed fcc a relatively short period of time when comparea to the time required for structural components to respond to temperature changes.
Therefore, GPUN concludes the reactor building and its contained equipment did not experience any further damage other than that described in Licensee Event Report 88-001.
8805260117 880516
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GPU Nuclear Corporabon is a subs: diary of the General Public Uhlibes Corporation
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U,S. NUCLEAR REGULATORY COMMISSION IE INSEECTION REPORT 88-02, PAGE TWO 4
As a result of the investigation of this event by GPUN and NRC inspection personnel, additional studies and evaluations were initiated.
A study is in progress to identify the reactor building temperature profile as a function of ventilation system status and outside ambient temperature conditions.
Also a study is in progress to identify reactor building structural and equipment temperature limitations.
An analysis of the results of these studies will provide the necessary data to develop guidelines detailing action levels, controls, and corrective measures to be taken during periods of sustained low temperature conditions.
Upon completion of the analysis discussed above, procedures will be revised to assure that limiting temperature conditions are not exceeded.
These procedural actions may include increased monitoring as outside temperatures decline, the installation of temporary heating capability in specific areas of concern, limiting ventilation intake to restrict cold air inflow, or a combination of these actions based on the pre-established guidelines.
These actions in conjunction with those described in GPUN'S Licensee Event Report and the response to the Notice of Violation will specifically identify temperature limitations and appropriate actions to prevent a recurrence of this event.
GPUN expects to complete these actions by the end of September, 1988.
If you should have any questions, please contact Mr. George W. Busch at (609) 971-4909.
' ery tru y
. Fitzp rick d[77-f l
Vice President and Director Oyster Creek l
EEF/GB cc: Mr. William T.
Russell, Administrator Region 1 U.S. Nuclear Regulatory Commission 475 Allendale Road King of Prussia, PA 19406 Mr. Alexander W. Dromerick, Project Manger U.S. Nuclear Regulatory Commission Division of Reactor Projects I/II Washington, DC 20555 NRC Resident Inspector Oyster Creek Nuclear Generating Station Forked River, NJ 08731
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