ML20009F149
| ML20009F149 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 01/24/1978 |
| From: | Niav Hughes TENNESSEE VALLEY AUTHORITY |
| To: | Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20009F148 | List: |
| References | |
| NUDOCS 8107290249 | |
| Download: ML20009F149 (3) | |
Text
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' TENNESSEE VALLEY AUTHCRITY CH A TTA N.CC 3 A. TEP.IS f;E 37401 4
~,. L.;,,
g/yganuary 24, 1978' j-J pp 7073 s (f#"'ye:4,('
d:li A3 Director of Nuclear Reactor Regulation U.S. Nuclear Regulatory Cotanission
' N' ;
11h Washington, DC 20555 Centlemen:
QUESTION AIRE FOR NRC RELIABILITY STUDY OF STANDBY DIESEL GENERATOR UNITS In response to Karl R. Goller's letter dated Decem~er 15, 1977, on u
this subject, we are enclosing the completed questionnaire.
l
^
A supplemental report will be st.bmitted on those items for which we could not readily obtain information.
Very truly yours, TENNESSEE VALLEY,UTHORITY A
N. B. Hughes, Jr.
Manager of Power Enclosure l
I D
49 810720 F
M 05000259 i
PDR 780310270
- An Equal occartunity Emp; oyer l
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id s,
i
..q Are any foreton cases such as propane, freon, halon, carbon S.
-')
. dioxide, etc. storea in the: Diesel Engine room?
-,R Yes No X or adjacent buildings? Yes X No 4
Il If yes, (other than hand portable fire extinguishers), then identify gases and give approximate tank size.
3 Volume (V1 ) Tons
.f
.., Gases
-s if x
17 tons p
Liquid coo - U1 and 2 y
6 tons 3
Liquid CO, - U3
.I Does control system autenatically bypass, in emer9ency 1
T.
,]
starting, any engine temcorarily out of service for
-maintenance? Yes No X
.4 If yes, then how many failures to ' bypass have occured?
j y
k Does the c,ontrol system automatically override the test U.
g
. mode under emergency conoitions? Yes X
No j
Have repetitive mechanical f ailures occurred in any ccmoonent part
- gl f
.V..or subsystem of tne engine, gene,rator, or switcn gear, ecc.?
-I Yes X No
- 0..
0 Air start motor system
.If yes, then which part or subsystem?
}
.a
.How many failures?
UN
,f
.I Give nature of failure. Forcinn material in air start system gets 1.
in valves and air start motor vancs.
I
'-!'t*
}
Would periodic (yearly or other) evaluation and/or testing A
W.
(
'by "outside experts' contribute sicnificantly to the diesel-generator reliability? Yes No X
}
a We have developed.
Give brief reasons for the answer.
(
a good maintenance program with trained personnel.
Vendors are contacted upon necu casts.
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Give the accumulated time-load ocerating record for each e
j x,
1.
diesel-generator unit frca installation to the present
'i (Running Hours):
j suppicmental report if
..f Preoperational test Date data exists.
.f
- Engine Sury. Testing & :
cnergency iotai 4..k 4
- Serial No. :
Nintenance Hrs. :
and Other Hours :
No Load : Loaded :
Service Hrs. :
- h:#
' ~h
- )
j 4
'T c'2
- .)
-t
.Y T
."h 757.
Surveillance test load (percent of continuous rating) y,k,l 2.
I Give the projected or olanned tice-loaf 60eration for
- 3. -each diesel-generator unit curing the next 12 :::ontns. - Approximate
-y
!j c.ergency' iotal
.y
- Surveillance 4 h(s
- liaintenance Hrs. :
and other :
Hours Service Hrs. :
.i 18 5
.W 13 ry Provide the following sunma'r'y o'f the peric'dic surveillance' testing
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4.
m exp.erience:
-.g g.
g
. Starting date of surveillance testing (OL date) U3 - 11/21/75 Y
A.
b.
Periodic test interval Monthly U1 and 2 - 262 U3 - 113 Total number of surveillsnce tests nerformed c.
7 (see Abnormal occurrence j
m 4.
Total number of tegt failures Reports)
'h 5
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failure to accept ic;d 0 _.
0 Tailure to start failures due to coerator error e
'
- failure to carry loaa 4
failure due to equionent not being operative during emergency 2
I
____ conditions o
3
.:j Supply a copy of the surveil' lance test procedures with this e.
't.j completed questiorinaire. - (attached) o
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