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 .

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Zn, . February 14, 1978 Q'1 .

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BEco. Ler. #78-26 l

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~ 7 Director of Nuclear Reactor Regulation .i -

• 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

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

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. Very truly yours, l

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7?C550015 l h IO, Attachments I D

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8107:.s10135 810720 PDR ADOCK 05000293 p PDR -

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S. Are any foreign cases sucn as pro;rane, freen, halon, carbon dioxide, etc. storec in the: Diesel Engine roem? f!o Yes flo .# or adjacent buildings? Yes w . . .. . If yes, (other than hand portacle fire extinguishers), then

,' identify gases and give approximate tar.k size.

.'. 3 Volume (f t )

Gases T. Does control systect autenatically bypa:s, in cmergency

. .: starting, any engine tem;orarily out of service for maintenance? Yes __ fic _p <'

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

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.._7,.,

Does the control system aut:matically overritie the test raode under emergency conditiens? Yes j."'

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U.  !!o V.

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

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

Yes n #!!o 10 r/c3 _,

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

How many failures? '/

: 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 n - cc < :+-c r, se

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Pe:Je .w.sti is 6Asin . c e":,%c

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.. j 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): -

. .-- h, r 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. ~

Surveillance test load (percent of cortinucus rating)

/ ; 'c-2.

3. Give the projected or clannec tice-1cid coeratica for .

eaca diesel-generator unit during tne text 12 cenths.'

-  : Surveillance &  : Ecergency  : '. ctal  :  :

?.cu rs  :  :

flaintenance Hrs. : and other :

: Service Mrs. :  :

cac m:: A_x .

.[,,  :  : c< , e. t -  : 52.'.N L-S :

• .m c < e c o  :

e' re' W.  :  :

4. Provide the follcuing succary of the iriccic surveillance testing experience: ,

Starting date of surveillance testing (OL date) 'D

. 'J 77-a.

, b. Periccic test interval / '55% v i c. Total number of surveillance tes 3 :erformed

d. Total nuceer of test f ailures m L; .

f aii re to accept load

": failure to start

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

_" 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.

e. .

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