ML17053C098

Forwards Request for Addl Info Re Adequacy of Station Electric Distribution Sys Voltages in Order to Complete Review of 791003 Submittal.Response Due in 45 Days

ML17053C098
Person / Time
Site:	Nine Mile Point
Issue date:	11/10/1980
From:	Ippolito T Office of Nuclear Reactor Regulation
To:	Dise D NIAGARA MOHAWK POWER CORP.
References
NUDOCS 8012010460
Download: ML17053C098 (8)

Text

Docket No.60-220 NOV 1

0 1980 Distribution:

Docket NRC PDR Local PDR ORB Reading NRR Reading D. Eisenhut R. Purple T. Novak R. Tedesco G. Lainas J.

Roe OEL'D OI SE (3)

T. Ippol ito P. Polk S. Norris NSIC TERA ACRS (16)

J.

Heltemes, AEOD'r, Donald P. Disc Vice President - Engineering c/o Hiss Catherine R. Seibert Niagara Hohawk Power Corporation 300 Erie Boulevard Nest

Syracuse, New Yor k 13202

Dear Hr. Disc:

Me are currently reviewing your submittal dated October 3, 1979 regarding adequacy of station electric distribution system voltages for Nine Hile Point, Unit l.

In order to complete out review, qe need the information requested in the Enclosure to this letter.

Please provide your response to the questions in the Enclosure within 45 days of receipt of this letter.

Sincerely, Origlnel Signed by T. A. Ippolito

Enclosure:

Request for Additional Information cc w/enclosure:

See next page Thomas A. Ippolito, Chief Operating Reactors Branch ¹2 Division of Licensing CD CO~l 1

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I UNITEO STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, O. C. 20555 November 10, 1980 Docket No. 50-220 Mr. Donald P. Disc Vice President - Engineering c/o Miss Catherine R. Seibert Niagara Mohawk Power Corporation 300 Erie Boulevard West

Syracuse, New York 13202

Dear Mr. Disc:

Me are currently reviewing your submittal dated October 3, 1979

~ regarding adequacy of station electric distribution system voltages for Nine Mile Point, Unit 1.

In order to complete our review, we need the information requested in the Enclosure to this letter.

Please provide your response to the questions in the Enclosure within 45 days of receipt of this letter.

Sincerely,

Enclosure:

Request

,or Additional Information Thorn s A. Ippolito, Chief Operating Reactors Branch 82 Division of Licensing cc w/enclosure:

See next page

0

Mr. Donald P. Disc November 10, 1980 cc:

Eugene B. Thomas, Jr.,

Esquire

LeBoeuf, Lamb, Leiby 8 MacRae 1333 New Hampshire Avenue, N.

W.

Suite 1100 Washington, D. C.

20036 State University College at Oswego Penfield Library - Documents

Oswego, New York 13126 Mr. Joseph. J.

Sunser, Manager System Security Niagara Mohawk Power Corporation 300 Erie Boulevard West

Syracuse, New York 13202 Resident Inspector c/o U.S.

NRC P. 0.

Box 126

Lycoming, New York 13093 (Security matters only)

REQUEST FOR ADDITIONAL INFORMATION NINE MILE. POINT 'NIT 1 ADEQUACY OF STATION ELECTRIC DISTRIBUTION SYSTEM VOLTAGES

REFERENCES:

1.

NRC letter (William Gammill) to All Pow r Reactor Licensees,'ated August 8, 1979.

2. Niagara Mohawk Power Corporation letter (Donald P.

Oiese) to NRC (William Gammill), dated October 3, 1979.

In reviewing the information provided in Reference 2 in response

.o the NRC letter of Auoust 8, -1979, there are several areas where you have not provided sufficient information to permit an evaluation of the adequacy of station electric distribution system voltages for the Nine Mile Point Unit 1 nuclear power station.

The ollowing addi tional informat ion i s required:

1.

The voltage rating for all Class lE equipment for continuous operating and starting conditions.

Z.

An analysis of the voltage at the terminals of all Class lE motors and starters during starting and running under worst case plant operating conditions.

3.

An analysis. of the e fects of starting a large non-C1ass lE load on the Class lE equipmen The analysis should include he voltage at the terminals of all Class lE loads under-the conditions of full auxiliary plant load, including Class lE

loads, during the starting of the non-Class 1E Toads and also determine. if separation from the offsite power source will occur as a result of he action of the undervoltage relays.

4.

An analysis should be performed to assure that the maximum voltage ratings o

the Class 1E loads will not be exceeded under conditions of minimum plant electrical load and maximum expected offsite grid voltage.

5.

Documentation that no manual 1oad shedding is used to prevent unacceptable voltage at the terminals of the Class 1E equipment.

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