ML19332A733

Requests Addl Info Re Adequacy of Station Electrical Distribution Sys Voltage

ML19332A733
Person / Time
Site:	Rancho Seco
Issue date:	09/03/1980
From:	Reid R Office of Nuclear Reactor Regulation
To:	Mattimoe J SACRAMENTO MUNICIPAL UTILITY DISTRICT
References
TAC-10968, NUDOCS 8009180176
Download: ML19332A733 (4)

Text

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UNITED STATis y 7),.,

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September 3,1980

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Docket No. 50-312 3

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Mr. J. J. Mattimoe Assistant General Manager and Chief Engineer Sacramento Municipal Utility District 6201 S Street P. O. Box 15830 Sacramento, California 95813

Dear nr. Mattimoe:

We have reviewed your submittal dated August 1,1980, concerning

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Adequacy of Station Electrical Distribution System Voltage. We have identified the need for additional information in order for us to complete our review. This infomation is identified in the Enclosure.

We have informally discussed this information with your staff, and it was agreed that you could respond by September 22, 1980.

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's Robert

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

Enclosure:

Request for Additional Information cc: w/ enclosure See next page 8009110 ) 7f

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I Sacramonto Municipal Utility District g

cc w/ enclosure (s):

N, Christopher Ellison, Esq.

David S. Kaplan, Secretary and Dian Grueuich, Esq.

General Counsel California Energy Commission 6201 S Street 1111 Howe Avenue P. O. Box 15850 Sacramento, California 95825 Sacramento, California 95813 Ms. Eleanor Schwartz s

Sacramento County California State Office Board of Supervisors 600 Pennsylvania Avenue, S.E., Rm. 201 827 7th Street, Room 424 Washington, D.C.

20003 Sacramento, California 95814 Docketing and Service Section Office of the Secretary Business and Municipal Department U. S. Nuclear Regulatory Commission

.ccramento City-County Library Washington, D.C.

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.28 I Street Sacramento, California 95814 Resident Inspector P. O. Box 48 Director, Technical Assessment Fair Oaks, California 95628 Divisicn Offi:e of Radiation Programs Dr. Richard F. Cole (AW-459)

Atomic Safety and Licensing Board U. S. Environmental Protection Agency Panel Crystal Mall #2 U. S. Nuclear Regulatory Commission Arlingcen, '!irginia 20460 Washington, D.C.

20555 C. S. Environmental Protection Agency Mr. Frederick J. Shan a

Regi:n IX Office Atomic-Safety and Licensing Board ATTN:

EIS COORDINATOR Panel 215 Frem:nt Street U. S. Nuclear Regulatory Commission San Francisco, California 94111 Washington, D.C.

20555 "r. ?obert S. Borsum Elizabeth S. Bowers, Esq.

S eccck i Milcox Chairman, Atomic Safety and

'.:cl2ar :ower Generation Division Licensing Board Panel bi :2 *23, 7735 Old Georgetown Road U. S. Nuclear Regulatory Commissicn Uthssta, Maryland 20014 Washington, DC 20555

.10: ras Eaxter, Esq.

sw, Pittman, Potts & Trowbridge 700 " 5:reet,7iM eington, D. C. -2003G

er: M. Srewn, Esq.

Mr. Michael R. Eaton ence Coe Lanpher, Esq.

Energy Issues Coordinator

, Christcpher and Phillips, P. C.

Sierra Club Legislative Office

St., NW 1107 9th St., Room 1020

on, D. C.

20036 Sacramento, CA 95814

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. District cc w/ enclosure (s):

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Atomic Safety and Licensing Board 1.

Panel 2

• i U. S. Nuclear Regulatory Comission i

Washington, D.C.

20555 Atomic Safety and Licensing Appeal i

Board Panel i

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V. S. Nuclear Regulatory Commission Washington, D.C.

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California Department of Health i

ATTN:

Chief, Environmental

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Radiation Centrol Unit i

Radiological Health Section 3

714 ' Street, Room 493

'I Sacramento, California

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2 gt; REQUEST FOR ADDITIONAL INFORMATION Mt g=

RANCHO SECO g;

gg DEGRADED GRID VOLTAGES (PART A)

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iti Ref. 1 : Sacramento Municipal Utility District (SMUD) letter Hj to-the NRC, dated August 1, 1980 2 =.

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Ref. 2: NRC letter to SM00, dated June 3,1977 d5 E~f.;

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Ref.1, Enclosure II, page 16, shows that testing of the voltage E.fjj protection system will be performed on a refueling interval si

pi rather than a monthly interval as required in Ref. 2, Enclosure.2,

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Table 4.3-2.

We consider that testing should be performed on a

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.9 monthly basis.

Please revise your submittal.

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Ref. 2, Enclosure I, page 3, item f, requires.that the second level j-of undervoltage protection trip setpoints (voltage and time) be A

defined having minimum and maximum limits in the technical specifica-tions.

Ref. 2, Enclosure II, page 11, does not provide the time delay setpoint and tolerances associated with the dropout voltage.

Submit how the licensee plans to meet this recuirement.

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