ML17053D842

Forwards Request for Addl Info Re 821201 Response to Multi- Plant Action Item C-11 on BWR Reactor Protection Sys,In Order to Complete Review.Info Must Be Received within 45 Days of Ltr Receipt

ML17053D842
Person / Time
Site:	Nine Mile Point
Issue date:	06/03/1983
From:	Vassallo D Office of Nuclear Reactor Regulation
To:	Rhode G NIAGARA MOHAWK POWER CORP.
References
NUDOCS 8306150631
Download: ML17053D842 (8)

Text

June 3, 1983 Docket No.

50-220 Mr. G.

K. Rhode Senior Vice President Niagara Mohawk Power Corporation 300 Erie Boulevard West

Syracuse, New York 13202 tribution acket File Local PDR ORB¹2 Rdg.

DEisenhut BHermann SNorris NSIC JTayl or ACRS 10 Gray file EJordan OELD JLeonard

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION ON MPA C-ll, BtlR RPS POllER SUPPLY MODIFICATION Re:

Nine Mile Point Nuclear Station, Unit No.

1 Reference is made to your submittal dated December 1, 1982 which provided information on your review and proposed modifications to the power supply for the Reactor Protection System.

The information was reviewed by our staff and we find that the items identified in the enclosure are required to complete our review.

In order to support our review schedule for this multi-plant activity, you are requested to provide the information within 45 days of the date of receipt of this letter.

The reporting and/or recordkeeping requirements contained in this letter affect fewer than ten respondents; therefore, OMB clearance is not re-quired under P.L.96-511.

Sincerely,

Enclosure:

As stated ORIGINE SIGNEDM Dom'enic B. Vassallo, Chief Operating Reactors Branch ¹2 Division of Licensing cc w/enclosure I. Ahmed J. Selan (Livermore) 8306i50631 830603 PDR ADOCK OS000220 PDR OFFICE/

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Mr. G. K. Rhode Niagara Mohawk Power Corporation Nine Mile Point Nuclear Station, Unit No.

1 CC:

Troy B.,Conner, Jr.. Esq.

Conner 8 Wetterhahn Suite 1050 1747 Pennsylvania Ave.,

NW Washington, D.C.

20006 Di rector, Technological Development Programs State of New York Energy Office Swan Street Building CORE 1 - Second Floor Empire State Plaza

Albany, New York 12223 0

Mr. Robert P. Jones, Supervisor Town of Scriba R.

O.

84

Oswego, New York 13126 Niagara Mohawk Power Corporation ATTN:

Mr. Thomas Perkins Plant Superintendent Nine Mile Point Nuclear Station P.O.

Box 32

Lycoming, New York 13093 John W. Keib, Esquire Niagara Mohhwk Power Corporation 300 Erie Boulevard West

Syracuse, New York 13202 Regional Administrator, Region I

U.S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, PA 19406 Mr. Jay Ounkleberger Division of Policy Analysis and Planning New York State Energy Office Agency Building 2, Empire State Plaza

Albany, New York 12223 U.S.

Environmental Protection Agency Region II Office Regional Radiation Representative 26 Federal Plaza New York.

New York 10007

'esident Inspector c/o U.S.

NRC P. 0.

Box 126

Lycoming, New York 13093

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REQUEST FOR ADDITIONAL INFORMATION NINE t)ILE POINT NUCLEAR STATION, UNIT NO.

1 MONITOR'ING OF ELECTRIC POWER TO THE REACTOR PROTECTION SYSTEM (1)

Submit the nominal voltage and frequency at the f2tput to the monitoring system from which the setpoints are selected.

Verify that this voltage will ensure the General Electric required normal operating RPS component terminal voltage of 115+ 2 volts.

,(2)

Submit verification that the design and installation of the monitoring system (including control power, independence, etc.)

meet the requirements of GDC 2, GDC 21, IEEE 279-1971 and IEEE 384-1974.

(3)

Provide

. procedures for tenting the design modifications after installation to ensure that acceptable voltages and frequency are present at the terminals of the RPS components, such as the scram discharge solenoid valve.

(4)

Verify from manufacturer data that'he overvoltage, undervoltage, and underfrequency trip setpoints with their associated time delays (including tolerances)'re acceptable.

The acceptable setpoints should ensure adequate protection of all RPS components, such as the scram solenoid discharge valve.

(5)

Submit draft proposed Technical Specification changes to incorporate.

the design modifications in accordance with the standard Technical Specifications (i.e., LCO's, surveillance requirements and trip set-points).

The proposed changes should also include the time delays associated with each trip setpoint.

(6)

The underfrequency setpoint (pick up frequency) is to protect the RPS components from abnormal frequency.

Explain why the underfrequency setpoints for MG sets 162 and 172 are different from.those for HG sets 131 and 141.

4e A