ML20009F138
| ML20009F138 | |
| Person / Time | |
|---|---|
| Site: | Haddam Neck File:Connecticut Yankee Atomic Power Co icon.png |
| Issue date: | 02/21/1978 |
| From: | Switzer D CONNECTICUT YANKEE ATOMIC POWER CO. |
| To: | Schwencer A Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20009F128 | List: |
| References | |
| 780201, NUDOCS 8107290239 | |
| Download: ML20009F138 (4) | |
Text
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CONNECTICUT YANKEE ATOMIC FOWER COMPANY B E R I.l N. CO N N ECTICur ~
R O. 90X 270 MANTFORD. COMMECTICU1' OctOt vessemene
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February 1, 1978 pc i-A-
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Docket W. 50-213 k,hl%. R'
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Director of Nuclear Reactor Regulation
'+ / j,,,, 1, Attn: Mr. A. Schwencer, Chief Operating Reactors Branch #1 U. S. Nuclear Regulatory Co= mission Washington, D. C.
20555 Raferences:
(1) Letter from K. R. Goller to D. C. Switzer dated. December 15, 1977.
(2) Letter from K. R. Galler to D. C. Switzer dated January 3, 1978.
Gentlemea:
Haddam Neck Plant Ouestionnaire for Reliability Study of Standby Diesel Generator References (1) ar.d (2) requested responses regarding the de=on-strated reliability of standby diesel generators. As requestec.,
CYAPCO has completed the enclosed questionnaire and is forwarding a single copy. Although Reference (1) requested a response by January 20, 1978, the attached information was not available by that date. This dalay was discussed with the NRC Staff and was acceptable.
Very truly yours, CONNECTICUT YANKEE ATCMIC PCWER CCMPATI
- 3. C. Switzer
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President Attachtent 0107290239 810720
.,9 PDR ADOCK 05000213
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Are any foreion gases suctr as propane, freon, halon, carton dioxide, etc. stored in the: Diesel Engine room?
Yes X
No or adjar.ent buildings? Yes X No If yes,. (other thart hand portable fire extinguishers), then identify gases anc. give approximate tanic size.
3 il Gases Fire Volume (f t )
N/s Extinouishers 4
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Does control system automatically bypass, in emergency i
starting, any engina temporarily out of serifce for A
maintenance? Yes No X
Redundant engine proven J
operable before maTiTMnance.
d If yes, then how many failures to bypass have occured?
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Does tne control systcc automatically override tne test mode under emergency concitions? Yes X, No,
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Have repetitive n: chanical failt.res occurrM f rr any component part or subsyster:t of the engine, generator, or switch gear, etc.?
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Yes No X 1j If yes, then which part or subsystem?
e How many failures?
Give nature of failure.
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Would periodic (yearly or other) evaluation and/or testing 4
by "outside excerts" contribute sige.ificantly to the diesel-generator reliaoility? Yes No X
2 ve crief
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Ou-own P.it. Procram has proven sufficient.
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Give the accumulatec time-load coerating re:ord for each diesel-generator unit frorn installation to the present 1
5 (Running Hours):
6-16-69 Preopera.tional i.ast Date _
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- Engine Sury. Testing & :
Emergency Total
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- Serial !!o. :
Maintenance Hrs. :
and Other Hours :
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No load : Loaded :
Service Hrs. -
1381 60 339 e10 409 i
1382 60 i
334
<10
$ 404
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Surveillance test load (percent of continuous ratina) 100 1
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Give the projected or olanned time-load operation for A
each diesel-generator unit during the next 12 months.
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- Surveillance &
Emergency :
Total m*
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- ltaintenar.ce Mrs. :
and other :
Hours
- Service Hrs. :
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- 2/conth 0
24 1
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Provide the following sunmary of the periodic surveillance testing Segan when plant came experience:
online in 1967,pecceds Starting date of surveillance testing (OL date)were chanced whe.1 a.
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Periodic test interial
- 4cnthly dieseis were replaced in 1970 # oo y
Total numoer of surveillance tests cerformed f
c.
d.
Total nuroer of test failures Il 7
f ailure to accept load 0
failure to start failure to carry load J
f ailures due to coerator error 0
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j failure due to equionent not' being operative during emergency 0
conditions _
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j Supply a copy of the surveillance test procecures with tnis q
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j completed cuestionnaire.
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Additional Comments
- however, Air '10 tors (for starting) have In-Line Oilers.
our main diesel problem was starting with two motors.
If engine does not start with two air motors after 3 Rust buildup seconds, four motors (total installed) are used.
in the motor was the cause. The air supply line was changed from the tattom of the air tank to the top to minimize water l
or moisture and also tne motors were placed on a preventative
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These measures have removed the problem.
4 maintenance program.
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General succestions Briefly give constructive criticism or suggestions as to These imorovement in reliaoility of the diesel generators.
- .;.,, aintenance, cract:ces, orders, remarks may cav. e policy, adjustments, etc.
Preventative Maintenance was solved all minor problems and 1
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at this time we consider our diesels very reliable.
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