ML19339A908
| ML19339A908 | |
| Person / Time | |
|---|---|
| Site: | Yankee Rowe |
| Issue date: | 01/28/1978 |
| From: | Groce R YANKEE ATOMIC ELECTRIC CO. |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| WYR-78-5, NUDOCS 8011050681 | |
| Download: ML19339A908 (24) | |
Text
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u m M 3 g g: g ee 90u 110-390 0739 YANKEE ATOMIC ELECTRIC COMPANY uYR,8-5 20 Te rnpike Rood Westborough, Massachusettd0$58i~~/
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January 20, 1978
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United States Nuclear Regulatory Comission N
Washington, D. C.
20555 Attention: Office of Nuclear Reactor Regulation
Reference:
(a) License No. DPR-3 (Docket No. 50-29)
(b) USNRC letter dated December 15, 1977, Reliability of Standby Diesel Generator Units - Questionnaire
Dear Sir:
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 tne best 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. Norman St. Laurent, Yankee Atomic Electric Company, Star Route, Rowe, Massachusetts, 01367. Telephone Number:
(413) 625-6140.
Very truly yours, YANKEE ATOMIC ELECTRIC COMPANY R. H. Groce Licensing Engineer RTT/kg Enclosures d
8011050ff/
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Questionnaire for NUCLEAR REGULATORY 'C0tiMISSION RELIABILITY-STUDY of Standby Diesel Generator Units Date Questionnaire Completed:
//4 /78 Piant Hace:
Yga gee A rvA r c.
ELEC. Co. Unit Ho.
Diesel Manufacturer: G ew e a t.
Moro4s Model:
7 i & a - 7aoa Number of Units:
3 i
Size Kw/ Unit:
goo (W Rated Speed:
/doo #PM Average Operating Hours Per Unit to Date:
-) o o DIESEL GENERATOR STATUS A.
Enaine:
1.
Problems are caused chief 1y by (give estimated number) a.
Defective parts o
o.
Installation errors:
o c.
Failure of system to responc properly in function or sequence:
, 0, d.
Faulty adjustment:
O 2.
Would nore stringent inspection and testing requirements durino acceptance or preoperational tests significantly inprave the diesel-generator power plant performance?
Yes No
/
B.
Starting Systens (indicate which):
1.
Air-to-cylinder cranking.
t Air cranking notor Mfr.
Model No. _
Electric cranking notor V lifr. 7eegao
!!adel No. s7-ptd-a, 3
~
%q
)
(
2.
If air crct<ing, then:
j/$h Give sila of starting air tank: Length Diameter Normal standby air tank pressure psi.
Is pressure reducer used? Ye, No Reducer pipe size?
inches.
Startir.g air control admission valve pipe size in air piping system, inches.
Minimum air tank pressure for engine cranking psi.
Numbe: of five-second cranking periods between above pressures with no tank recharging Number of air tanks per engine Can starting air tanks serve more than one engine?
Yes No Is air pipe to engine from top of air tank? Yes No Does starting air tank have water condensate drain?
Yes No Does starting air pipe have water condensate trap and drain near engine? Yes No Is starting air piping horizontal? Yes No Does it slant toward drain? Yes No If water condensate drains are provided, then is draining:
a.
Automatic through float valve? Yes No b.
Manual by hand valve? Yes No c.
If nanual, then is draining water condensate cone:
e
+
9
u
./
Q Q
~
J
,/
e daily?
weekly?
nonthly?
before each start if manual?
no procedure?
Is dirt and rust filter provided in starting air pipe?
Yes tio _
If provided, where installe::?
i How is it cleaned?
How often and when?
inches.
Give pipe size of filter:
How is it knovin whether filter is plugged or has high oressure drop?
Is starting air pipe to en;ine cositioned:
a.
Below floor?
b.
On the floor?
c.
Overhead?
What is air _ pressure crop fren air -tank to engine during cranking psi Give approxiraate length (rearest ten feet) of starting air oice for individual engine or all engines fron air tank to:
a.
f.tearest enaine feet b.
Furthest encine fee:
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I P002 GR!GMAL j
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U
, Dianeter of s:arting air pipe from:
a.
Air tank to star-ing valve inches b.
At air starting vahe inches c.
At engir.e inches What is the primary source of power for the starting air system?
Is there a duplicate and redundant motor and air compressor set? Yes No What is the t.1e required to recharge one air tank?
)
minutes Does starting air supply system have independent secondary power suppiy for compressor? Yes No If yes, then by:
a.
Gasoline engine?
b.
tiotor driven?
c.
Other? (Specify) 3.
If electric (Battery powered) cranking, then:
a.
Battery charging: Continuous trickle charger
/
Intermittent charging If so, how is charging requirement determined?
- Time cycle MoNTHL y C VCR CHA R G G Test Other.
b.
Battery used:
Ccamon Plant
/
Individual Unit Other 2So n c H 4-Starting cable size $ 2 ; Length:
Battery to engine (longest) Sgo' op af,gey _ 7,i,fe 3, 1
I i
l 1
b a
O
,/
4 m
./
Y U '
C.
Fuel Oil Syste,: Sulk Tank to Day Tank 1.
Does the bulk tank to day tank fuel sucaly system (viz:
pump, motor, etc.) have redundant indepe'ndent pcser supplies? Yes No
/
(G4Averf rech)
Does this system have a hand-operated energency fuel pump? Yes No V
If yes, is this hand-operated pump and piping in inmediate operating condition? Yes No 2.
Is there a water and sediment drain from the very bottom of the:
i a.
Bulk tank? Yes No
/
b.
Day tank?
Yes v No 3.
Is the regular functional fuel oil outlet slightly above (two to three inches) the botton of the:
a.
Bulk tar.k? Yes # No b.
Day or integral tank?
Yes / No 4.
Ie bottom of day tank and/or intecral tank above all parts and piping of the engine fuel injection systems?
t Yes No V
If yes, Give approximate amount inches feet 5.
Does the engine fuel system have a fuel bleed return line to the fuel day tank and/or integral tank?
Yes
/ No During extended coeration, such as more than two to three hours, does the fuel in the day tank become:
(yes or no) a.
Warm?
Ve5 b.
Hot?
it, (above 130*F)
8 y
'/ f O
o
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uj l )
What is fuel oil return lind size (nominal}?
a.
Pipe size 8/p inches b.
Tubing size gfg, inches p
6.
Do engine fuel oil filters have air bleed or vent valves readily accessible? Yes / No 7.
How is fuel-transferred frca day tank to engine fuel systen?
a.
By gravity
/
b.
Engina driven punp c.
Electric motor driven cuno d.
Is a manual pump also provicea for injection system filling and/or air venting after servicing or replacenent of parts in the fuel injection systen? Yes
/ tio If yes, is the T1anual punp in immediate operating condition?
Yes
/ Ho 8.
Type of fuel (e.g., #1, =2, =3, JP-4, etc. )
-# 2 9.
Approximate bulk tank capacity, 90,000 gallons.
- 10. Typical freauency of refilling (weekly, monthly, etc.)
Ov4Rrcely
- 11. Typical refill (gallons),
~/ G o o D.
Lube Oil Systen 1.
Lube oil a.
Type ^
ARCO fleer X Hb b.
Vi scosi ty SA s-So c.
Specification numoer A rtswac. Ac H Fic t.b Co.
/ l-o f-ty d.
Oil change determined Dy:
Time interval:
Yes / No Give interval
/g mo nontnly, yearly By oil analysis:
Yes v No (if,4MAtysis D icTd re.s -
ot t WoM Lb 8C CH AN$Q hoge frecoestLf) e m
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2.
Lu'be oil filters are:
a.
Full flow V
b.
Bypass c.
Conbination 3.
Interval and/or basis for chanaing filter cartridae:
a.
Monthly Byrunnin~gtire)
Yearly
(/gmo b.
hours c.
MofC FWoWW d.
By oil an'alysis.
Yes V No
[MsaurDicrwre C//d"Sc) e.
By pressure drop.
Yes No v f.
Does provisions exist for changing cartridges during engine operation? Yes No V 4.
Oil Pressure Monitoring a.
Normal operating pressure 6-f psi b.
Alarm 37 psi c.
Shutdown #g psi 5.
Oil temperature control:
a.
By standby beater in engine sump
/ a fdf 'F.
b.
Heating neans for maintai. ng stancoy tenperature:
Direct in oil V
i Oil-to-water heat exchancer Other (Specify)
E.
Coolina System - Engine 'Jater l
1.
Temperature control by:
a.
By thermostat in water?
Yes
/ No If yes, then:
=
Bypass therrostat? Yes
/ No Throttle thermostat? Yes No r
t I
e Y
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A
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8_
b.
By radiator shutter:
g Automatic
/
Manual Other (give type) 2.
Corrosion control (water additive)? Yes
/
No If yes, give chemical additive or name of compound.
PERAY CoolsM9
$ 'S TAM
(*UbI*MES Y
Proportion or concentration control:
a.
By additive measurement? Yes V No b.
By water coolant analysis? Yes No V 3.
Engine cooling water cooled by:
a.
Radiator?
/
e b.
Heat exchanger fron sea, river or other water?
c.
Other?
(give type) 4.
Engine cooling water temperature-monitoring a.
Standby tem::erature 1(Ct o*F t
b.
Noraal cperating temperature las tio*F c.
Alarm tenperature port (
"F d.
Shutdown te cerature A/M_* F e.
Water circulation during stanoby:
Thermo-syphon'
/
Pump 5.
Water Pressure Monitoring:
Yes No V
a.
Alarm b.
Shutdown c.,
Both W
r O
o l,
6.
'*ater temperature Sensor Position:
a.
In piping from engine b.
In engine piping
/
c.
In engine direct 7.
Water surge or supply tank in system.
Yes No V
If yes, then bottom connected to:
a.
Water pump suction? Yes No' b.
Top of system? Yes No c.
Both of above? Yes No d.
Is bottom of surge tank above top of engine system? Yes
. No Does_ engine have constant air bleed from top of e.
engine water piping to surge or supply tank?
Yes No f.
Give size of bleed or vent line, inches.
g.
Manual air bleed only? Yes No F.
Governor - Speed Control tianufacturer
- 0ab sundb Electric (speed sensing)
Hydraulic V
Type or code (sucn as EGB-35, LSG-10, etc.)
SG zeveg (ouTRoL Automatic load sharing? Yes No V
(pg) 1.
Is compensation or stability contrcl and/or speed of response manually adjustable? Yes V No If yes, adjusted by; a.
Eye and ear?
b.
Test and specification?
L/ (1. B. 0 8 /oo3 c.
W>ochwAR t) c.
Other?
(Speci fy) 2.
Engine - generator normal shutdown or stopping means and method.
S.
l
'/'
A p
V d
1 Is the engine stopped:
a.
flanually? Yes / No If yes, then:
Directly at engine? Yes
!!o V
Through local control panel? Yes / No
/ COMT4aL 48*h b.
Auto.matically throunh the controls in the control room? Yes tjo V
c.
By setting governor to " fuel-off" position?
Yes / 18 0 d.
By over-ride of governor settings and control position directly to fuel injection pumps?
Yes tJo
/
e.
Other means.
Describe briefly.
O VER SPffb Sw TcM nnh essesseacy Pasu Burror) (LocnLLf 3.
When engine is stopped, is fuel control in:
a.
Full fuel, or riaximun fuel position?
b.
Full off or no fuel position?
/
c.
Intermediate?
d.
Randon?
(If not consistent and typical in above, then give the usual.)
4.
When starting from the standby condition after shutdown fer at least 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, give nutber of seconcs fron start-to-crank to full fuel or maximun fuel position of governor and fuel control,
/,
' seconds.
1
s u,
/
/ '
G.
Governor - Ove-s:eed (shutdown) 1.
S::eed sensing?
a.
Electrical
/
(6cve<No4) b.
Flyball c.
Other (Specify) 2.
Fuel shutoff force generated by:
a.
Spring?
b.
Air?
c.
Hydraulic?
d.
Electrical?
/
e.
Other? (Specity)
TRIPS AllA. bSM P ER -S H U D"3 * * *" #"0'" L 3.
Overspeed sensing setting?
(in terms of full spead) a.
115$
V b.
110%
c.
Other (Specify) 4.
Is oversoeed tripping set coint tested periodically?
Yes V tio If yes, then how often?
/6mo (yearly, r.onthly, etc. )
H.
1.
Generator l1fr.
DEtco flodel tJo.
F MgS9 VB Single cearing or two bearines?
Smqf e Does generator have damper windings?
Yes s/ No 2.
Does generator have any ocvious fault or difficulty?
Yes flo /
Is problem recetitive? Yes tJo If yes, then describe briefly.
f
,eg V b, I.
Exciter and Voltage Reaulator 1.
Exciter tlanufacturer:
b EL co tiodel E VBS9 Ve_
Type: act3-i. ;
/
Static If rotating drive? Direct Belt or Cnain DC with field control Brushless with rec.tifier V
2.
Voltage Regulator: ttanufacturer Dr4co tiodel Type: t!cchanical Static V
3.
Are paralleled units of automatic load sharing control y of fully automatic type? Yes ilo If yes, has any obvious influence or interrelationship been noted between the stability and response tine of the engine governor and the stability and voltage control of the generators? Yes tio 4.
Have engine governor and voltage reculator/ exciter adjustments been nade on the site nr under any con-ditions since any of the units have been placed in service? Yes V ilo If yes, by neans of what tests and what standards?
Give nace or very orief description.
M4uvfg e71/gERS G o s' M N " K -
fasrgueriod Boot < - SPCQ_.?Rooy daJvsTMc,7 o^)
5.
If any difficulties have occurred, give approximate g
nucber or proalems.
a.
Ccaponents b.
Wiring c.
Other (danage in service or cropping of miscellaneous hardware into switchboard, etc.)
PDOR GRfGDIAL
O O
13 a
J.
Pa Pie'f y:
Enaine-Generator Units 83 1.
Do all units cxs:sw.:%.
ave the proper voltage output?
Yes No 2.
Do all units automatically share both the "real" or in-phase load and also the reactive load reasonably well? Yes No 3.
At the same Kw load, are both the field and the arnature line currents of the several units consistently close to the same value? Yes No If no, approximate percent difference.
4.
Synchronizing g
a.
In automatic synchronizina do circuit breakers close immediately af ter reaching full synchronous speed?
Yes No b.
If "no" above then, does speed of some units drif t slowly while failing to synchronize and close circuit breakers?
How many seconds?
Occasionally Always Never K.
Switch Gear and Electrical Cor.T4ou. (other than exciter /
voltage reguiator) 1.
If any difficulties have occurred, then give approximate number of problems.
a.-
Components 2.
b.
Wiring _ O c.
Other (danace in service or dropping of miscellaneous
. hardware into switchboard, etc.)
d.
Design concept faults.
That is, aoes the switch cear and its controls perform the procer functions and in proper sequence and timing.
o
{
e
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, 4, m
2.
a.
Do the on-site diesel generator units and related support equipment have any storage battery / power systems for any service whatsoever? Yes No b.
Identify each storage battery power systen associated with the on-site diesel generator unit and its function.
3 srs rio a seconce. derrennes - on e.
fM CA CH b t tSel foR J VA A 7/Asf 4 cwt &L Po tutt c.
Does each systen identified above adequately fulfill the service requirements for which it is intended?
Yes V No If no, briefly describe.
d.
Is there a DG battery maintenance program? Yes / No L.
Safety Shut downs Give safety shut down settinos compared to equilibrium e
operating conditions.
1.
Engine ar.d generator speed.
Give rpa or hertz:
a.
Synchronous and usual
/ goo rpn or (a o Hz b.
Overspeed shutdown setting nogo rpa or bz 2.
Engine cooling water (see E.4) a.
Ecuilibrium listio 'F b.
Alarn por fg
'F c.
Shut down x49
'F 3.
Lube oil pressure (see 0.4) a.
Equilibriun 6f psi b.
Alarn 29 psi c.
Shut down ara psi g o:
~
Q 0
~
4.
Lube oil temperature a.
Ecuilibrium ntsf S *F b.
Alarm NA
- F c.
Shutdown pA
- F 5.
Indicate all other protective interlocks (give nane and;)
a.
Usual or proper conditfori ovraexAA>v-segem.
0 YEA SPe t b I S*/a A8we ARTfD CPf6 b.
Shutdown condition _ oveA' $Peeb APProxoM Te '.y R ic o R P M - deser A>R % A MPle s 6.
a.
What source of power is provided to operate alarms and shutdown controls?
(See G.2) frAnod DA77eK7 b.
Do the generator units automatically shutdown in case of the electrical power loss to its control systen? Yes V No M.
Emergency or Alert Conditions 1.
Are all safety shutdown and safety interlocks bypassed during emergency conditions? Yes No V
2.
If "no" above, then which are not bypassed.
Name items.
O VdA $Pt'e'h SHt> T h owx) 3.
For each interlock not bypassed is coincident loaic used?
Yes No v
If yes, is it testable?
Yes No N.
Maintenance 1.
Does plant have recularly scheduled' maintenance pro-cedures?
)/g 5 If so, return copy of these procedures with questionnaire.
I e
v a ~
2.
When neea for ninor adjustants obviously exists, then:
Is remedial action taken immediately or at earliest a.
practical opportunity? Yes /_'No _
Is renedial action taken only at periodic prescheduled b.
or progran ed times and conditions? Yes No V For best performance record which of above appears c.
better:
immediate or early action?
/
as scheduled only?
Must permission for minor maintenace be obtained fron d.
sone higher out-of-plant authority? Yes No V
Is maintenance referred to above allowed and encouraged?
e.
Yes / No In periodic surveillance tests, simulated alert standby f.
tests, etc., is the criteria " pass /not pass" the test used? Yes / No Is there a conscious continuing policy to detect and g.
for i
renedy narginal conditions or inminent trouble:
exanples:
lube oil pressure shutdown only two to five psi below operating pressure or, perhaos overspeed governor setting only one or two percent aoove starting speed surge or etc.? Yes v No Are efforts to remedy narginal cr questionable conditions h.
as nentioned above encouraged by plant nanagement?
Yes v
No i.
Are remedial steps on items similar to the above taken or allcwed when the unit has started and operated satisfactorily within s;ecified limits or conditions?
Yes
/ No 0.
Startina Conditions 1.
Give starting or necessary cranking tima as exoerienced.
Starting tine per specification
- //
seconds a.
b.
Usual starting tire 6,
seconas Itaxirua starting time caserved
//
seconds c.
j pU O,
- 1,7 -
2.
Give usual time intervals as follows:
a.
Tine frca start-to-crank to first firing of any cylinder. _ _.S~
seconds i
b.
Time from start-to-crank to approximate full firing of all cylinders.
/,
seconds 3.
Give maximum speed surge when starting; use both tachometer and frequency meter if possible.
a.
Usual conditions /#oo rpm so Hz b.
Maximum observed a s o rpm Gt Hz 4.
During a surveillance tes't, give time from start-to-crank to when steady synchronous speed is attained and maintained.
a.
Usual
//
seconds
[#*' l*d b) b.
Maximun f.S seconds c.
As specified are seconds.
5.
Give briefly the nost troublesome problems in starting.
a.
Most troublesome _ Goyegag - mo GulrS/coqecrdb 19 9 )
FsulTS(coggcert b.
Next to most troublesome bc coe rcot - N o m
P.
Air Cleaner or Air Filter - Conbustion Air 1.
Combustion air source:
taken fron engine roon or inside the building, or from outdoors?
a.
Indoors
/
b.
Outdoors 9
..i_.
9 O
N
\\
~~
- 2. ' Give type and mak(. of air cleaners or air filters:
a.
Oil bath flake b.
Oil wetted screen flake c.
Paper
/
Itake Re Un9Am W d.
Other Itake e.
Precleaner:
Yes No if 3.
Excessive air flow restriction and servicing need detemined by?
a.
Instrument such as:
s manometer If other give type v/ARR IN1Dic.ROTL b.
Personal judgement by appearance, etc.
j c.
By smoking exhaust 1
d.
Time schedule Other (Specify) ca;;Mcm Tumc5 Tog ( ELTER Mkm d*
l e.
TL*q APPEDRs 4.
Are climatic extremes nomally experienced such as.
l Air heavily loaded with water mist, high humidity a.
and low temperature? Yes No
./
T p
b.
Blowing sand and dust? Yes No
,/
')
S c.
Blowing snow (blizzards)? Yes No g d.
Other-Name 5.
Are climatic extremes potentially possible such as:
Air heavily loaded with water mist, high humidity a.
and low temperature? Yes
./ No b.
Blowing sand and dust? Yes No f
c.
Blowing snow (blizzards)? Yes,/ Ho d.
Other-!1ame Q.
Temperature Conditions 1.
Ambient outside hottest ~ IO O *F.
2.
Ambient outside coldest N -215 *F.
3.
Engine-generator room hottest ~ LOO *F.
l 4.
Engine-generator room coldest v 55
- F.
5.
Inside switch gear hottest 85 "F 6.
Inside voltage regulator or ambient near voltage
,~
regulator hottest N 100 *F
)
7.
Ambient at exciter hottest v '100 *F P00R OREMAL...-. ql n
O R.
Operator Qualifications (as presently exist' and suggested minimums if cifferent) 1.
Minimum education required (check)
Existing Suggested a.
High School v/
- - ~ ~ ~
r b.
Trade School e
e w
c.
Technical School 6"
c-d.
No minimum 2.
Minicum Years of operating experience (diesel electric generator)
Existing Sucgested a.
0-3
/
v b.
3-6 c.
6-10 d.
10-15 3.
Operator training Existing Sugc?sted a.
tiilitary c/'
b.
Industrial c.
On-the-job ve d.
Con.wination of a, b, v'
and c (indicate which) 4 Licensing required
[xisting Suggested a.
State b.
Federal c.
Utility or self d.
None V
V
..o.
U
(/
/
/l 20
/
/
S.
Are any foreien cases such as propane, freon, halon, carbon dioxide, etc. stored in the:
Diesel Engine room?
Yes No
/
or adjacent buildings? Yes
/ Ho If yes, (other than hand portable fire extinguishers), thea identify gases and give approximate tank size.
3 Gases cwasu> broobe Volume (f t )
2 aorne s p+ 2oo lhfA.(5sae W) 3 At t TA'ze t*'n IR EnrrtesQ SI ft.cr.
T.
Does control system autc.natically bypass, in emergency starting, any engine tenporarily out of service for maintenance? Yes No V
If yes, then how many failures to bypass have occured?
U.
Does the control system automatically override the test jg mode under emergency conditions? Yes No V.
Have 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?
How many failures?
Give nature of failure.
W.
Would periodic (yearly or other) evaluation and/or testing by "outsice experts" centricute significantly to ne diesel-generator reliability? Yes
/
No Give brief reasons for the answer.
ou rsioe cyre rs
.4e <-
Usec $ /B m o ra resys t s for Tes Tiv9 DotstL Euf eU L fu el sorec rol's "
E Q u e e n en T-such ae<
./
.efa,
/-
(~).
C.
x t
X.
1.
Give the accumulated *.i e-load operating record for each diesel-is erat:- r.it from installatf or, to the present (Runnir.g..cers):
Preoperational test Date ##V# b ec /178 Engine Sury. Testing &
Energency Total
- Serial flo. :
fiaintenance Hrs. :
and Other Hours No L oa'd : Loaded Service Mrs. :
- /6 VA-lfa3:
3a
- A4 V yo 7oo
- /4 VA -trey:
34 R(o 1430
?oc
$ I& VA -stos$
Sg
$ S Vo VSo po p 2.
Surveillance test load (percent of continuous rating)
- 607, 3.
Give the projected or olanned ti ae-load coeration for each diesel-generator unit during the next 12 montn:.
~
- Surveillance &
Emergency Total
- llaintenance Mrs. :
and other :
Hours Service Hrs. :
4.
Provide the followin: sunnary of the periodic surveillance testing experience:
a.
Starting date of surveillance testing (OL date)
/a /m 2 /70 b.
Periodic test ir.terval th eerL V c.
Total number of surveillance tests cerfor: ed ae7 d.
Total nuncer of test failures 9
failure to start p
failure to accept load failure to carry loao a
failures cua to operator erece o
failure due to eauinnent not being operative during emergency conditions o
e.. Supply a copy of the surveillance test procedures with this conaleted cuestionnaire.
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General Suggestions Briefly give constructive criticism or suggestions as to improvement in reliability of tne ciesel generators. These remarks may cover tests, naintenance, oractices, orders, policy, acjustments, etc.
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CATE CP DOCUMENT Yankee Atomic EleC. Co.
1/20/78 N. R. C.
Westborough, Mass.
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