ML20009F335

Forwards Completed Questionnaire Re Standby Diesel Generator Units Reliability,In Response to NRC

ML20009F335
Person / Time
Site:	Maine Yankee
Issue date:	01/20/1978
From:	Groce R Maine Yankee
To:	Office of Nuclear Reactor Regulation
Shared Package
ML20009F334	List: ML20009F333 ML20009F335
References
WMY-78-5, NUDOCS 8107300305
Download: ML20009F335 (4)

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ENGINEERING OFFICE WESTBORO, MASSACHUSETTS 0 581 617 *66-9011

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I January 20, 1978 i

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United States Nuclear Regulatory Commission

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Washington, D. C.

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g,g 'Md4 cay,4 Attention: Office of Nuclear Reactor Regulation

Reference:

(a) *icense No. DPR-36 (Docket No. 50-309)

(b) USNRC letter dated December 15, 1977, Reliability of Standby Diesel Generator Units - Questionnaire

Subject:

Standby Diesel Generator Units Questionnaire As requested in your letter, Reference (b), we are forwarding to you the completed standby diesel generator units questionnaire. To the bes,t of our knowledge all the information stated within is correct and we trust it will meet your satisfaction. If you have any additional questions or comments pertaining to this questionnaire, please contact Mr. Charles Frizzle, Maine Yankee Atomic Power Company, P.O. Box 11, Wiseasset, Maine, 04578. Telephone Number:

(207) 486-1606.

Very truly yours,

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c MAINE YANKEE ATOMIC POWER COMPANY R. H. Groce Licensing Engineer RTT/kg Enclosures l

i 9107300305 810720 PDR ADOCK 05000309 i

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-20 S., Are any foreign gases such as propane, freon, halon, carbon dioxide, etc. stojd in the:

Diesel Engine room?

No v/

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Yes No _#

or adjacent buildings? Yes If yes, (other than hand portable fire extinguishers), then identify gases and give approximate tank size.

3 Gases Volume (ft )

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Does control system autonatically bypass, in emergency starting, any engine temporar,ily out of service for maintenance?

Yes No V If yes, then how many failures to bypass have occured?

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Does tne control system automatically ovgrride the test mode under emergency conditions? Yes V No V.

11 ave repetitive mechanical failures occurred in any component part or subsystem of,the engine, generator, or switch gear, etc.?

Yes No /

If yes, then which part or subsystem?

M/A

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How many f ailures?

M /A Give nature of fai1 ~re.

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Would periodic (yearly or other) evaluation and/or testing by "outside experts" contrioute significantly to the diesel-generator reliability? Yes

, No Give brief reasons for the answer.

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Give the accumulated time-load operating record for each diesel-generator unit from installation tu the present (Running -surs):

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Preoperational test Date LI-al 7 l

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I tal Engine Sury. Testing &

Energency o

Serial flo. :

liaintenance Mrs. :

and Other Hours No load : Loaced Service Hrs; :

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Surveillance test load (percent of continuous rating) 3.

Give the projected or olanned time-load operatio for each diesel-generator unit durie.g the next 12 months.

Surveillance &

Emergency Total

Maintenance Mrs. :

and other Hours Service Hrs. :

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Provide the follcuing sunnary of the periodic surveillance testi g experience:

Starting date of surveillance testing (OL date)

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Periodic test interval ucc_ttV

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Total nunber of surveillance tests cerformed C /DwrM L.

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Total nuccer of test failu-?s I

failure to start Hew..

f ailure to accept load I

failure to carry load Mm:-.

f ailures due to operator errcr McAE failure due to eauinnent not being operative during emergency

ondi tions K1.* w C-Supp'y a copy cf the surveillance test procedures with this e.

ccnoleted cuestionnaire.

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Additional Comments Ti4E, %n 'PenFbeu Au-m QErfgig ng ms uAns,/tw PcA DIGSct.

Eufuocs (h3 GE, ArrRtpoTcD Tn 609 foLyt> of Mrututtres ~THE MumEJ2. OF FAST STAm k:AE AV m4E Ew2iNc%. 'IME STRESS ~

AQlSiMG F&nu TACEMAL fMSALAMCES, ASM/ATSD WITu-F-AST STARTS "FAA% f.,hree, AT Au ouredi AL RATE wrm THE. Qisixs F4GiME.

TcuptcA.ruc.e.. AMD C.LEARAMS N3T OF 115 OCTIMIwi QAMGE

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General Suggestions Briefly give constructive criticism or suggestions as to These improvement in reliacility of tra diesel generators.

remarks may cover tests, naintenance, oractices, orders, policy, adjustments, etc.

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