ML20214E265

Forwards SER & Technical Evaluation Rept Re Reliability of Tdi Diesel Generators as Emergency Power Sources.Conditions Under Which Engines Possess Required Operabilty & Reliability Discussed

ML20214E265
Person / Time
Site:	San Onofre
Issue date:	11/19/1984
From:	Crutchfield D Office of Nuclear Reactor Regulation
To:	Baskin K SOUTHERN CALIFORNIA EDISON CO.
Shared Package
ML20214D670	List: ML20214D667 ML20214E060 ML20214E265 ML20214E423 ML20214E480 ML20214E485
References
FOIA-86-656 LSO5-84-11-016, LSO5-84-11-16, NUDOCS 8611240389
Download: ML20214E265 (4)

Text

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h UNITED STATES f NUCLEAR REGULATORY COMMISSION ,

; wasmwoTom, o. c.nosas j Novenber 19, 1984 Docket No.

50-206 LS05-84-11-016 Mr. Kenneth P. Baskin, Vice President

• Nuclear Engineering Safety and Licensing Department

• Southern California Edison Company" 2244 Walnut Grove Avenue Post Office Box 800 Rosemead, California 91770 -

SUBJECT:

TRANSAMERICA DELAVAL, INC. (TDI) DIESEL ENGINE RELIABILITY AND OPERABILITY - SAN ONOFRE NUCLEAR GENERATING STATION UNIT 1 1

Enclosed is the staff's Safety Evaluation concerning the reliability and operability of the Transamerica Delaval Inc. Diesel Engines used as emergency power sources for San Onofre Unit 1. Also enclosed is a Technical Evaluation Report (TER), prepared by staff consultants, on this subject. As discussed in the Safety Evaluation, the staff concludes that these diesel engines possess the necessary operability and reliability to fulfill their intended emergency power function, at least until the next refueling outage, subject to the following conditions:

1. Southern California Edison Company (SCE) proposes Technical Specification changes to accomplish the following: .

I

a. engine load shall not exceed 4500 kw S% for engine testing and emergency service requirements; and 7

b. monthly surveillance testing will not include " fast starts, a rather " slow starts." The refueling interval " fast start" test a

which simulates design basis service requirements should be

, retained.

, 2. SCE impicments the reconinended changes to maintenance and surveillance provided in Section 4 of the TER. The revised maintenance and surveil-lance program should be submitted to the staff.

3. The DG #1 torsiograph measurements and results are provided, confirming the maximum angular deflection and. crankshaft stresses (including ine oil holes) resulting from normal, fast and slow starting, coastdown and load ac::eptance and rejection.

8611240389 861110 PDR FOIA ELLIS86-656 PDR

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l Mr. Kenneth P. Baskin l

4. SCE conunits to the following:

a. to conduct cylinder block surveillance for cracks in the flange region if major disassembly is perfomed per Owners Group or SCE recommendations;

b. to upgrade cylinder heads on an approximately 25% basis at each refueling outage or extended reactor downtime;

c. to 1nodify its planned inspection of high-pressure fuel lines, at

, the next refueling outage, to provide 100% inspection to Owners Group specifications;.

d. to conduct an inspection of front-end gears. and gear teeth and their support bearings on DG #1 as soon as practical and no later than at the next refueling outage;

e. to conduct an analysis of the response of the 12 components affected -

by the crankshafts torsional vibration to detemine what, if any, inspections might be required at the next refueling outage; and

f. to implement all relevant Owners Group reconinendations in a timely inanner.

5. Provisions should be made in plant procedures to instruct operators to limit manual application of additional loads to those deemed necessary, during plant emergencies, for safe shutdown of the plant, without exceeding the overall short-term capability of the engines.

The above items have been discussed with members of your staff and it is our understanding that they are acceptable to SCE. 4s.aaaed de 6 ttons, We .. .h "h C__ m . ,. . . . a .. _ . . _ ; _ -

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i , The proposed Technical Specification changes should be submitted within 60 i

days of receipt of this letter. The remaining items should be done as soon

, as possible; your response to this letter with your schedule for completion .

is requested within 15 days.

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• Mr. Kenneth P. Baskin The reporting and/or recordkeeping requirements contained in this letter affect fewer than ten respondents, therefore, OMB clearance is not required under P.L.96-511.

Sincerely,

• g -

D. M. Crutchfield, Assi ant Director for Safety Assessmen Division of Licensing

Enclosure:

Safety Evaluation cc w/ enc 1:

See next page e

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Mr. Kenneth P. Baskin ' ' '

CC -

Charles R. Kocher, Assistant General Counsel James Beoletto, Esquire

. Southern California Edison Company Post Office Box 800 .

Rosemead, California 91770 ._

David R. Pigott '

Orrick, Herringt'on & Sutcliffe '

600 Montogmery Street -

San Francisco, California 94111 Dr. Lou Bernath .

San Diego Gas & Electric Company P. O. Box 1831 San Diego, California 92112 Resident Inspector / San Onofre NPS c/o U.S. NRC P. O. Box 4329 San Clemente, California 92672 Mayor City of San Clemente San Clemente, California 92672 _

Chairman Board of Supervisors County of San Diego San Diego, ~ California 92101

- Director -

Energy Facilities Siting Division

. Energy Resources Conservation &

Development Commission 1516 - 9th Street Sacramento, CA 95814 U.S. Environmental Protection Agency

. Region IX Office ATTN: Regional Radiation Representative 215 Freemont Street San Francisco, California 9410S John B. Martin, Regional Administrator' Nuclear Regulatory Commission Region Y 1450 Maria Lane Walnut Creek, California 94596