ML20009F427

Forwards Completed Questionnaire Re Reliability Study of Standby Diesel Generators

ML20009F427
Person / Time
Site:	Pilgrim
Issue date:	02/14/1978
From:	Andognini G BOSTON EDISON CO.
To:	Office of Nuclear Reactor Regulation
Shared Package
ML20009F426	List: ML20009F425 ML20009F427
References
78-26, NUDOCS 8107310135
Download: ML20009F427 (3)

Text

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3. CAmb ANCOGN4NS g'

.0ANAGER qucLEam omCmAttcNS CEPamTMENT e'

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Zn, February 14, 1978 Q'1 l

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BEco. Ler. #78-26

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l Director of Nuclear Reactor Regulation

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i U.S. Nuclear Regul'atory Com:21ssion d

l Washington, D. C.

20555 Docket No. 50-293 l

License No. DPR-35 l

l Reliability Study of Standby Diesel Generators

Dear Sir:

In letters dated December 15, 1977 and January 3,1978, power reactor licensees i

were requested to complete a questionnaire on standby diesel generators. The l

attached questionnaire for the Pilgrim Nuclear Powe,I Station diesels has been ec=pleted and is hereby submitted.

3osnn Edison Conpany regrets the delay in transmitting the survey results, however, due to some c: mission we were not aware of the request for such in-l for=ation until receipt of your January 3, 1978 letter.

At that time appropriate steps were taken to obtain a copy of the questionnaire and begin ec= piling the responses.

We trust that this infor=ation will contribute to the reliability study.

If additional infor=ation is required concerning this subj ect please contact the

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individual identified on the cover sheet of the question = aire.

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Very truly yours, l

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l :l; ['gh'u b ret u-

.Yj' 7?C550015 l

h IO, I

D Attachments

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8107:.s10135 810720 PDR ADOCK 05000293 p

PDR

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20-Are any foreign cases sucn as pro;rane, freen, halon, carbon S.

dioxide, etc. storec in the:

Diesel Engine roem?

Yes flo or adjacent buildings? Yes f!o If yes, (other than hand portacle fire extinguishers), then w.....,'

identify gases and give approximate tar.k size.

3 Volume (f t )

Gases Does control systect autenatically bypa:s, in cmergency starting, any engine tem;orarily out of service for T.

maintenance? Yes __

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If yes, then how many f ailures to bypass have occured?

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Does the control system aut:matically overritie the test

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raode under emergency conditiens?

Yes j."'

!!o Have repetitive mechanical f ailures occurred in any com:onent part.

or subsystem of the engine, generator, or switen gear, eti.?

V.

n !!o Yes 10 r/c3 _,

if yes, then which part or sJbsys tem? 5'ri.A. -,WA "T.:

How many failures?

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Ka weie c,x-Give nature of failure. At*La d f-

':ould periccic (yearly or other) ovaluation and/or testing by "outside experts" contribute significantly to the diesel-generator reliability? Yes g lio g,..

'NS Give brief reasons for the answer. Av.<ww/%).b Pe:Je.w.sti is 6Asin. c e":,%c cc < :+-c r, se n

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21 X.

1.

Give the accunulated tir.e-load ccera-ing recore f:r each diesel-generator unit from insta,1.lati:n to the cresent (Running Mcurs):

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Preoperational test Date m /7c.

Engine Surv. Testing &

inargency Total

Serial No. :

liaintenance Hrs. :

and Other Hcurs No load : Loaded Service Hrs. :

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N.

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2.

Surveillance test load (percent of cortinucus rating)

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Give the projected or clannec tice-1cid coeratica for eaca diesel-generator unit during tne text 12 cenths.'

Surveillance &

Ecergency

' ctal

flaintenance Hrs. :

and other :

?.cu rs Service Mrs. :

cac m:: A_x

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52.'.N L-S :

e' re' W.

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Provide the follcuing succary of the iriccic surveillance testing experience:

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'J 77-Starting date of surveillance testing (OL date) a.

b.

Periccic test interval

/ '55% v Total number of surveillance tes 3 :erformed i

c.

d.

Total nuceer of test f ailures m

L;":

failure to start f aii re to accept load i

failure to carry icad f ail.res due to c:erator errc:

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f ailure due to ecuir, rent not bein; perative curing cecrgency condi tions e.

Supply a copy of tna surveillarce test peccecures with this -

concleted questionnaire.

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