ML17317B464

Forwards Request for Addl Info Needed to Complete Activity Re 770722 Submittal on Degraded Voltage.Response Required within 45 Days

ML17317B464
Person / Time
Site:	Cook
Issue date:	08/15/1979
From:	Schwencer A Office of Nuclear Reactor Regulation
To:	Dolan J INDIANA MICHIGAN POWER CO.
References
NUDOCS 7908210037
Download: ML17317B464 (8)

Text

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Docket Nos. 50-315 NRR Rdg.

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D. Eisenhut B. Grimes Nr. John DU]an, yice President Indiana and Nichigan Electric Company W

R ll Indiana and Nichigan Power Compynp.

Att OELD Post Office Box 18

Attorney, OELD Bowling Green Station New York, New York 10004 A. Schwencer D. Wigginton

Dear Nr. Dolan:

C. Parrish J.R.

Buchanan In our review'f your July 22, 1977 submittal on degraded'voltage for the D. C. Cook, Unit Nos.

1 and 2, we have determined that additional information is needed in order for us to complete this activity. It is requested that your response to the attached request for additional..information be submitted within 45'ays.

Sincerely, 1

cc:

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~<tginal Signed By A. Schwencer, Chief Operating Reactors Branch 81 Division of Operating Reactors

Attachment:

Request for Additional Information

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Docket Nos.

50-315 and 50-316:

UNITEDSTATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 AUG 1 5 1979 Mr. John Dolan, Vice President Indiana and Michigan Electric Company Indiana and Michigan Power Company Post Office Box 18 Bowling Green Station New York, New York 10004

Dear Mr. Dolan:

In our review of your July 22, 1977 submittal on degraded voltage for the D. C. Cook, Unit Nos.

1 and 2, we have determined that additional information is needed in order for us to complete this activity. It is requested that your response to the attached request for additional information be submitted within 45 days.

Sincerely,-

cc:

See attached list

<<m~u~

A. Schwencer, Chief Operating Reactors Branch 5'1 Division of Operating Reactors

Attachment:

Request for Additional Information

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Mr. John Dolan Indiana and Michigan Electric Company Indiana and Michigan Power Company cc:

Mr. Robert W. Jurgensen Chief Nuclear Engineer American Electric Power Service Corporation 2 Broadway New York, New York 10004 Gerald Charnoff, Esquire Shaw, Pittman, Potts and Trowbridge 1800 H Street, N.W.

Washington, D.

C.

20036 Citizens for a Better Environment 59 East Van Buren Street Chicago, Illinois 60605 Maude Preston Palenske Memorial Library 500 Market'treet St. Joseph, Michigan 49085 Mr. D. Shaller, Plant Manager Donald C.

Cook Nuclear Plant P. 0.

Box 458 Bridgman, Michigan 49106 Hr. R.

Masse Donald C.

Cook Nuclear Plant P. 0.

Box 458 Bridgman, Michigan 49106

RE(VEST FOR ADDITIONAL INFORMATION DONALD C; COOK NUCLEAR PLANT UNITS 1

AND 2 DEGRADED GRID VOLTAGE Staff Position l.f. states that the voltage monitors shall be designed to satisfy the requirements of IEEE 279-1971.

The intent of this position is that the monitors of 'the undervoltage protection system for the ESF loads are a part of the Class IE distr ibution system.

Therefore, the proposed scheme of monitoring the 34. 5 kV line as opposed to the 4160Y emergency bus is not acceptable.

Therefore, submit the system modification and Technical Specification changes in compliance with all.staff. positions of NRC letter dated June 2, 1977, which required you to provide the second level undervoltage protection for ESF loads against sustained degr'aded voltage.