ML20024A689
| ML20024A689 | |
| Person / Time | |
|---|---|
| Site: | Perry  |
| Issue date: | 06/10/1983 |
| From: | Edelman M CLEVELAND ELECTRIC ILLUMINATING CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| REF-PT21-83 10CFR-050.55E, 10CFR-50.55E, RDC-72(83), NUDOCS 8306220058 | |
| Download: ML20024A689 (2) | |
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P o. Box 5000 - CLEVELAND. oHlo 44101 - TELEPHONE (216) 622-9800 - lLLUMINAllNG BLDG- - 55 PUBLIC SQUARE Serving The Best Location in the Nation MURRAY R. EDELMAN vice meslOENT June 10, 1983 NUCUAR Mr. James G. Keppler Regional Administrator, Region III Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137 RE:
Perry Nuclear Power Plant Docket Nos. 50-440; 50-441 Final Report Regarding Cooling of the Reactor Core Isolation Cooling Room [RDC 72(83)]
Dear Mr. Keppler:
This letter is the Final Report purauant to 10CFR50.55(e) on the significant deficiency concerning cooling of the Reactor Core Isolation Cooling (RCIC) room during Loss of Cooling Accident (LOCA) conditions.
Mr. P. R. Pelke of your of fice was first notified on May 13, 1983, by Mr. B. D. Walrath of The Cleveland Electric Illuminating Company (CEI) that this problem was being evaluated. On April 29, 1983, Gilbert Associates Inc. (GAI) notified the Nuclear Regulatory Commission, under 10CFR21, of a deficiency in the Reactor Core Isolation Cooling room.
This report contains a description of the deficiency, analysis of safety implication, and the corrective action to be implemented.
Description of Deficiency The Reactor Core Isolation Cooling (RCIC) steam turbine driven pump is auto-matica11y started at a level 2 condition in the reactor vessel. The RCIC room I
in which the pump / turbine and accessories are located is cooled with a fan coil unit. The cooling water supply to the fan coil is not automatically activated when the RCIC turbine starts, therefore, the pump / turbine could be operating without adequate room cooling. Without cooling by the fan coil unit the ambient temperature within the room could exceed the maximum operating temperature of the pump / turbine accessories, which would impair the operation of the RCIC pump.
Analysis of Safety Implications The RCIC pump is required to operate during a design basis control rod drop accident in order to maintain core cooling prior to reactor depressurization.
If the operation of the RCIC pump is impaired due to the maximum operating temperatures of the pump / turbine accessories being exceeded, then this could result in iuadequate core cooling following reactor scram.
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PDR ADOCK 05000440 S
PDR 10 JUN 1 6 G83 i
Mr. James G. K:pplcr Jun2 10, 1983 Corrective Action Gilbert Associates, Inc. (GAI), the Architect / Engineer, is reviewing the operation of the RCIC pump / turbine automatic start on level 2 condition in the reactor _ vessel and will make appropriate changes to provide cooling water to the pump room cooling unit to assure adequate room cooling.
In response to Corrective Action Report 83-06, GAI is performing a review of safety systems to address the generic issue of this event on the Perry Plant design. This review will assure that automatic or manual start of support systems is provided for as required by the design.
We anticipate the above described corrective action to be completed by July 29, 1983.
Please call if there are additional questions.
Sincerely, M.
U Murray R. Edelman Vice President Nuclear Group MRE:pab cc:
Mr. M. L. Gildner NRC Site Office Director Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C.
20555 U.S. Nuclear Regulatory Commission c/o Document Management Branch Washington, D.C.
20555 Records Center, SEE-IN Institute of Nuclear Power Operations 1100 circle 75 Parkway, Suite 1500 l
Atlanta, Georgia 30339 l
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