ML20074A650

Interim Deficiency Rept Rdc 70(83) Re Restart of Control Complex Chiller Following Loss of Offsite Power or Loca. Initially Reported on 830407.Final Rept Expected by 830815. Also Reported Per Part 21

ML20074A650
Person / Time
Site:	Perry
Issue date:	05/06/1983
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-70(83), NUDOCS 8305130248
Download: ML20074A650 (2)

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THE CLEVELAND ELECTRIC ILLUMIN ATING COMPANY ILLUMINATING BLDG. e PUBUC SoVARE e CLEVELAND. OHIO 44101 e TELEPHONE (216) 623-1350 m MAIL ADDRESS: P. o. BOX 5000 Serving The Best Location in the Nation Murrev C. Edelman MAN %ER EPART EN May 6, 1983 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 Interim Report Regarding Restart of the Control Complex Chiller [RDC 70(83)]

Dear Mr. Keppler:

This letter serves as the interim report pursuant to 10CFR50.55(e) on the potential significant deficiency concerning restart of the Control Complex Chiller following either a Loss of Offsite Power (LOOP) or Loss of Coolant Accident (LOCA). This problem was identified to Mr. Pelke of your of fice on April 7,1983, by Mr. E. Riley of The Cleveland Electric Illuminating Company.

This report contains a description of the deficiency and the corrective action to be implemented.

Description of Deficiency Either a Loss of Offsite Power (LOOP) or Loss of Coolant Accident (LOCA) will cause a trip of the control complex chiller which is operating. Present design would leave the chiller inoperable for a minimum of twenty minutes due to protective interlocks. Operator action would be required to start the chiller.

This design conflicts with FSAR Section 9.4.9.5.la, for a LOOP, which specifies an automatic restart. Both the LOOP and LOCA condition also conflict with ANSI-N660 " Criteria for Safety-Related Operator Actions" which does not allow credit for operator action in the first ten minutes. After that initial period, several manual steps must be taken to start a chiller. Total down time would be approximately eighteen minutes. The temperature reached in the

• control room by this time could compromise the capabilities of both the control room operator and the safety-related equipment contained therein.

In addition, assuming a single failure in the redundant chiller, the time to restore a chiller woulu be in excess of twenty minutes. This would create even a more severe temperature problem in the control room.

8305130248 830506 PDR S ADOCK 05000440 PDR \'

MAY 1 1 083

, Mr. Jcmes C. Kzppler May 6, 1983 Corrective Action On March 30, 1983, Corrective Action Request 83-06 was issued to Gilbert Associates, Inc. (CAI), our Architect / Engineer, to obtain an evaluation of this situation. This evaluation will include identifying the cause and extent of this type of occurrence end also recommendations for corrective action to be taken. The initial completion date for this evaluation was April 26, 1983.

On April 27, 1983, however, the Assistant Project Manager for CAI notified the site personnel Quality Assurance Follow-up Engineer that further evaluation was necessary. In addition, CAI has reported the event to the NRC as a

" potential" reportable event under 10CFR21.

CAI has established July 30, 1983, as the new completion date for the evaluation.

We are presently planning to submit our final report on this subject by August 15, 1983.

Please call if there are additional questions.

Sincerely, h

Murray R. Edelman Vice President Nuclear Group i

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 l

Institute of Nuclear Power Operations 1100 Circle 75 Parkway, Suite 1500 Atlanta, Georgia 30339

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