ML18219D996

Response to Request for Evaluation of System Design to Determine Susceptibility to Overpressurization Events & Notify in 20 Days. Will Provide in 60 Days or Explain Why Cannot Meet Schedule

ML18219D996
Person / Time
Site:	Cook
Issue date:	09/09/1976
From:	Tillinghast J Indiana Michigan Power Co, (Formerly Indiana & Michigan Power Co)
To:	Rusche B Office of Nuclear Reactor Regulation
References
Download: ML18219D996 (6)

Text

U.S. NUCLEAR REGULATORY Co "SION NRC FORM 195

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NRC DISTRIBUTION FoR PART 60 DOCKET MATERIAL DOCKET NUMBER 5-FILE NUMBER Mr Rusche HLETTER jRIORIGINAL OCOPY 0 NOTOR IZE D 8 UNCLASS I F I E D PROP Indiana & Michtgan Pwr Co 8ew York, NY J Tillinghast INPUT FORM DATE OF DOCUMENT 9"9"76 DATE RECEIVED 9-13-76 NUMBER OF COPIES RECEIVED one signed DESCRIPTION Ltr re our 8-13-76 ltrfurnishing info concern ing overpressurization events......'NCLOSURE BONQT axprOVz ACKNOWEDGED PLANT NAME:

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INDIANA II MICHIGAN POWER COMPANY P, O. BOX 18 BOWLING GREEN STATION NEW YORK, N. Y. 10004 September 9, 1976 onald C.

Cook Nuclear Plant Unit No.

1 Docket No. 50-315 DPR No.

58 Mr. Benard Rusche, Director Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, D.C.

20555

Dear Mr. Rusche:

This letter is in response to Mr. Dennis L. Ziemann's letter dated August '13, 1976 which was received August 19, 1976 and requested an evaluation of our system design to determine the susceptibility to overpressurization events and to notify you within 20 days that we will provide all the information requested within 60 days or explain why we cannot meet this schedule and provide the schedule that will be met.

This letter is to notify you that a task group of utilities with Westinghouse plants has been formed, of which Indiana 8c Michigan. Power Company is a participant, to examine the complexity of the overpressurization events and to identify similarities. between Westinghouse plants for the purpose of determining a consistent solution to this problem.

This task group will meet with Westinghouse for the purposes of establishing plant groupings and, to evaluate the means by which the likelihood of additional occurrences of reactor vessel overpressurization events can be minimized.

We, as well as other utilities, are examining our plant's operating procedures and administrative controls during the 60 day period referenced in your August 13, 1976 letter.

The purpose of this examination is to evaluate procedural changes that<will minimize the likelihood of overpressurization events.

As an interim measure, the plant operating personnel have been

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September 9, 1976 Mr. B. Rusche informed of the potential for overpressurization and have been cautioned to minimize conditions which could cause such an event should reduced pressure and temperature operation occur before the detailed review is completed.

The results of the task group meetings will be reported to the NRC by each utility at the end of the 60 day period.

Recommendations and schedules will be given at that time as well as the results of the plant procedure review and, resulting procedure revisions, if appropriate.

Very truly yours, JT:mam Sworn to and subscribed to bef e

me this 9 th day of September 1976 in New York County, New York Notary Public KAYIILEENBARR~

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