ML19344F260

Forwards Request for Addl Info on Degraded Grid Voltage Re NRC Review of Application to Amend Tech Specs to Provide Second Level of Undervoltage Protection W/Time Delay for safety-related Loads

ML19344F260
Person / Time
Site:	Peach Bottom
Issue date:	08/21/1980
From:	Reid R Office of Nuclear Reactor Regulation
To:	Bauer E PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
References
NUDOCS 8009150033
Download: ML19344F260 (3)

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UNITED STATES 3-r, 4

-f s3 g NUCLEAR REGULATORY COMMISSION

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WASHINGTON, D. C. 20555 y

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August 21, 1980

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5i Dockets Nos. 50-277 4

and 50-278 5

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' Mr. Edward G. Bauer, Jr..

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i Vice President and General Counsel i

-Philadelphia Electric Company

.i 2301 Market Street

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Philadelphia, Pennsylvania 19101

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Dear Mr. Bauer:

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Your letter dated March 21,.1980 requested an amendment to the Peach

-3 Bottom Unit 2 and 3 Technical Specifications. The amendment revises i

your earlier application to provide a second level of undervoltage i

protection with a time delay for safety related loads.

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During our review, we determined that additional information is required. The information needed is described in the Enclosure. We request your response be submitted within 45 days of your receipt of this letter.

Should you have any questions, please contact us.

Sincerely, j)' /) l. '

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Robert W. Reid, Chief Operating Reactors Branch #4 Division of Licensing

Enclosure:

Request.for Additional Information cc w/ enclosure:

See next page r.

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h Mr.. Edward G.! Bauer, Jr.

Philadelphia Electric Company -

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I Eugene J. Bradley Director, Technical Assessment Philadelphia Electric Company.

Division Assistant General Counsel Office of Radiation Programs 2301 Market' Street (AW-459)

Philadelphia, Pennsylvania 1 9'301-US EPA Crystal Mall !2

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-Troy B. Conner, Jr.

Arlington, Virginia 20460 1747 Pennsylvania Avenue, N. W.

Washington, D. C.

20006 Region III Office ATTN:

EIS COORDINATOR

.Raymond L. Hovis, Esquire Curtis Building (Sixth Floor) 35 South Duke Street 6th and Walnut Streets York, Pennsylvania 17401 Philadelphia, Pennsylvania 19106

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Warren X. Rich, Esquire M. J. Coonby, Superintendent

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Assistant Attorney General Generaticn' Division - Nuclear Department of Natural-Resources Philadelphia Electric Company Annapolis, Maryland 21401 2301 Market Street Philadelphia, Pennsylvania 19101 Philadelphia Electric Company ATTN:

Mr. W. T. Ullrich Government Publications Section J

Peach Bottom Atomic State Library of Pennsylvania Power Station Education Building Delta, Pennsylvania 17314.

Commonwealth and Walnut Streets Mr. R. A. Heiss, Coordinator Pennsylvania State Clearinghouse Governor's Office of State Planning and Development P. O. Box 1323 Harrisburg, Pennsylvania 17120

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Albert R. Steel, Chairman Board of Supervisors Peach Bottom Township R. D. =1 Del ta, : Pennsylvania 17314 Curt Cowgill U. 5. Nuclear Regulatory Commission

-Office of Inspection and Enforcement Peach Bottom Atomic Power Station P.- 0. Box 399 Delta, Pennsylvania 17314 e

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K iREQUEST FOR ADDITIONAL INFORMATION y

PEACH-BOTTOM UNITS 2 & 3

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DEGRADED GRID VOLTAGE

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. Reference 1: Letter, Philadelphia Electric Co. (Bradley) to NRC

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(H. R. Denton),-dated Mar.ch 21, 1980.

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Reference 2: Letter,'(G. Lear) to Philadelphia Electric Co.

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-(E. G. Baure, Jr.), dated June 2,1977.

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Reference 3:. Letter, Philadelphia ' Electric Co. (S. L. Daltroff)

'to NRC (T. A. Ippolito), dated December 31, 1979.

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. set ' point at '90".-of 4160 v.(3744 volts), allowing the set point to vary l1.

Reference l' indicates a 15% tolerance in the degraded grid voltage relay fr._[

.==M between 3952. volts and 3536 volts.

These voltages should be compared

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. ith~the' Reference 3,. Table 1' minimum steady state voltage _(3770 volts) y w

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and 'he, lowest acceptable' voltage (3740 volts) resoectively, for a

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[.j.j possible spurious trip and/or damaging Class lE equipment such as over-s E31

-heating.. blowing fuses, etc.

Please document the findings.

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Reference 3, Enclosure 2, paga 2; states "...the coeration of any one of p~+.

these-three relays will-initiate the transfer to the alternate source.."'

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eference 2, Enclosure i, page'2, states tha "Tne voi: age prctection shali

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jh include coincidence logic..."

Explain how Peach 5cttom Units 2 & 3 mee:

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f this requisement.

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sference 2, inclosure 2, Table C 3-2,.incica e the: cnannel calibration 3

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's-required during refueling-or once per 13 months en ioss of vol: age and l:y idegraded voltage relays.

Reference l, croocsed 7.5.-page, page 51, states v w"

.: hat calibration will be' once/5 years.

Exclain now Peach Bot:om Units 2 t -r L-31can meet the NRC ' staff requirement.

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