ML20093M405
| ML20093M405 | |
| Person / Time | |
|---|---|
| Site: | Three Mile Island  |
| Issue date: | 10/17/1984 |
| From: | Hukill H GENERAL PUBLIC UTILITIES CORP. |
| To: | Eisenhut D Office of Nuclear Reactor Regulation |
| References | |
| 5211-84-2242, GL-84-15, NUDOCS 8410220110 | |
| Download: ML20093M405 (24) | |
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GPU Nuclear Corporation Nuclear ::r;;ss**o a Middletown, Pennsylvania 17057-0191 717 944-7621 TELEX 84-2386 Writer's Direct Dial Number:
October 17, 1984 5211-84-2242 Office of Nuclear Reactor Regulation Attn: D. G. Eisenhut Division of Licensing U. S. Nuclear Regulatory Commission Washington, D.C. 20555
Dear Sic:
Three Mile Island Nuclear Station, Unit 1 (TMI-1)
Operating License No. DPR-50 Docket No. 50-289 Diesel Generator Reliability (G.L. 84-15)
This is in response to Generic Letter 84-15 entitled " Proposed Staff actions to Improve and Maintain Diesel Generator Reliability".
Enclosure 1 describes actions which are being taken by GPUM to reduce the number of diesel generator fast Ftarts to enhance the reliability of TMI-1 diesel generators by minimizing the degradation due to testing.
Enclosure 2 describes TMI-l diesel generator reliability data including the assumptions which were made in order to qualify data, which was available, for use in determining reliability in accordance with R.G. 1.103. Inis demonstrates a 100>. reliability for the last 20 valid starts of both diesel generatorc and a reliability of .99 and .98 fo diesel generators A and B respectively for the last 100 valid starts. Table i provida- a time history of the data, which was available, including valid and invalid tests. GPUN is not required to maintain records of diesel generator operational and failure data as outlined in R. G. 1.108 Section C.3.a. Therefore, retrieval of diesel generator start data was complicated by the need to search in differant locations. Data entries also lacked the detail which would have permitted a more direct application of R. G. 1.108 valid start and failure criteria. In order to facilitate the monitoring of diesel generator reliability in the future, these records will be maintained as described in Enclosure 4 (GPUN comrnents on Section 9 of the staff's proposed performance specification) .
8410220110 841017 PDR ADOCK 05000289 PDR p
GPU Nuclear Corporation is a subsidiary of the General Pubhc Utilities Corporation
Mr. D. G. Eic nhut. 5211-84-2242 Enclosure 3 describes the current GPUN programs for attaining and maintaining the. reliability of TMI-1 diesel generators at a high level of performance.
Table 2 lists tasks performed during diesel generator routine maintenance and annual overhaul.
Enclosure 4 provides GPUN comments on the proposed performance specification.
Included are commitments for improved record keeping and reliability monitoring.
GPUN disagrees with any performance standard which would require unnecessary challenges to emergency diesel generator equipment. After the cause for a failure has been identified and remedied, appropriate tests to verify the adequacy of repairs would depend on the failure mode and type of corrective
-action taken. Further testing to generate a required number of satisfactory starts to raise the reliability statistics in some instances could be l
counterproductive.
GPUN asserts that high reliability can be achieved through the use of good preventive and corrective maintenance practices, by following the manufacturer's recommendations for maintenance and operation, and not through excessive mandatory test programs following a failure. As a result of meeting the objectives of a good maintenance program, the reliability data obtained from surveillance testing should continue to demonstrate high reliability.
Sincerely,
!! D. Huk 11 Director, TMI-l IIDil:MRK:vjf Enclosures- l cc: R. Conte, NRC Resident Inspector ,
Sworn and subscribed before me this rygday of October,1984. .
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My commission expires __ym - g g3# 333 3 ,
DARLA JEAN BERRY. NOIARY PU6LIC l 380ME105N 9000. DAUFMN COUNR MY COMMISSi% D P'' '"*' 19",
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Enclosure I Item 1. Reduction -in Number of Cold Fast Start Surveillance Tests for Diesel Generators
' ~GPUN's diesel generator surveillance programs for TMI-1 has recognized the
- potential degradation effects of cold fast starts for a long time. TMI-1 Technical Specifications Section 4.5.1.1 requires that we perform cold fast starts every refueling interval to verify operability of the emergency iesequence and automatic transfer (Surveillance Procedure 1303-11.10). Other i planned' tests or routine diesel starts follow che manufacturer's ,
recommendations for pre-lube and warming in preparation for starting the
' diesels, t
Surveillance procedures currently require a number of fast starts after
- wa rming. In an effort to improve diesel generator reliability by reducing the number. of hot fast starts during routine surveillance performances, the following procedures are being modified as indicated: '
I. SP 1303-5.2.(Quarterly): Diesels A & B are pre-lubed and warmed prior to fast start by ESAS aignal initiation. Both the A and B diesels are started 6 (six). times automatically and 2 (two) times manually.
' Procedure 1303-5.2 is being revised to reduce the number of automatic ,
fast starts from 6 to 2 for each diesel.
LII.- SP_1303-11.10 (Each Refueling): Diesels A and B are cold fast started 1 s(one) time each. Each diesel is also fast started 2 (two) additional
. times to verify undervoltage relay contacts. Procedure 1303-11.10 is being modified to delete the two additional fast starts for each diesel generator.
The above procedure changes are .ta) economize the number of diesel generator fast starts without compromising the effectiveness of either test procedure and without amending the TMI-1 Technical Specifications. On a yearly basis
. including' refueling this will reduce the number of diesel generator (hot) fast starts by ' eighteen for each diesel.
TMI-1 Technical Specifications do not require. tests of the emergency diesels
'for emergency cooling system operability. Therefore, changes to TMI-1 Technical Specifications are not'needed, f
l l
i Enclosure 2 9
Item 2.
DIESEL GENERATOR __ RELIABILITY _ DATA The reliability of the diesel generators at TMI-l'is shown below:
FOR LAST 20 FOR LAST 100 TESTS TESTS DG # OF FAILURES RELIABILITY #_OF FAILURES RELIABILITY A 0 1.0 1 .99
'5 0 1.0 2 .98 i
The above results are based on the attached data, Table 1. These data were !
obtained from the following TMI-1 documents:
- 1. Control room operator log books. ,
~'2.- Licensee Event Reports (LERs)
- 3. Technical Specification Completed Surveillance Procedures i
- 4. Maintenance Computer Records of Diesel Repairs.
Table 1 lists both valid and invalid tests. Tests were not considered valid tests or failures there .no diesels were successfully started, and then the tests were terminated intentionally without loading for less than one hour.
Invalid tests are unnumbered and-indicated by NA in the first column. Tests which were judged to be terminated intentionally before the completion of the ;
one hour load tests because of a significant failure that would have prevented ;
the diesels from operating during an actual emergency were considered to be '
valid failures. Start No. 77 on the 'A' diesel and starts No. 53 and 84 on the 'B' diesel were considered valid failures. If, however, the tests were aborted for reasons that were judged insignificant (i.e., would not prevent [
the diesel from operating during an actual emergency), the rests were '
considered to be invalid and hence were not counted as failures.
We believe-that these definitions of valid and invalid tests agree with '
I Regulatory Guide (R.G.) 1.108 criteria. The only exception to R.G. 1.108 is !
.that a few tests, terminated after only 55 minutes for no apparent reason, F were considered to be valid successful tests.
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m Enclosure 3 Item 3. . DIESEL GENERATOR _ RELIABILITY As indicated in the response to Item 2. Diesel Generator Reliability Data, the reliability of TMI-1 diesel generators is above the industry median value of 0.98/ demand at 0.985/ demand (average reliability for the last 100 test runs) and is significantly above 0.95/ demand set by the NRC staff in the proposed resolution of USI A-44, as a minimum desired level.
This excellent record has been achieved with a preventive maintenance and annual overhaul program which consists of task items listed in Table 2. This work is included in our procedures and is consistent with the vendor's (Fairbanks Morse) recommendations.
NUREG/CR 0660 " Enhancement of On-Site Emergency Diesel Generator Reliability",
February 1979 was reviewed for applicability to the diesel generater units at TMI-1. As indicated in our reliability data, we have not been subject to the failures that have occurred at other facilities. In the few instances of failures we have observed. " root causes" were vigorously pursued, corrected, and reported as required. Items that are planned for the TMI-1 diesel generators as recommended in NUREG/CR 0660 aret (1) Inspection of the air start system for corrosiott degradation since we do not have air dryers. Installation of air dryers is under consideration.
(2) Installation of additional generator protection to prevent danuJe in the event of fault occurrances. Relays have been maintained periodically, resulting in good reliability.
(3) Other hardware modifications and practices recommended in Task V of NUREG/CR 0660 are being considered for implementation to maintain or improve the good reliability we now have.
Nuclear Safety Analysis Center (NSAC/79) "A Limited performanco Revtew of Fairbanks Morse and General Motors Diesel Generators at Nuclear Plants".
April,1984 was reviewed for applicabslity to TMI-1 diesel generators. The conclusions of this reviews (1) implementing a well documented comprehensive, preventive maintenance program, (2) prelubing of the main bearings and turbocharger bearings, and (3) continuously heating the lubricating oil and cooling water, have been in effect at TMI-1 and have contributed to our good reliability record.
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, Enclocuro 4 ,
GPUK rammants on the NRC Staff's Example of Diesel Generator Performance Technical Specification ;
t Para.~1- A reliability of 0.95 per demand or greater is considered to be reasonable and achievable under present unit designs and operational conditions.
Para. 2 Surveillance testing as included in the TMI-l Technical Specification and summarized above does not include accelerated testing av a function of reliability degradation. Present i maintenance procedures and/or practices require that repairs as a result of failures be tested sufficiently to ensure reliability of the diesel generators. " Root cause" investigations are carried out so that " permanent" modifications are accomplished as appropriate. It is these root causes that should be the determinate of any accelerated surveillance test program based on unique situations or case by case determinations. For example, heat exchanger failures are usually of a long term nature and are usually replaced by heat exchangers which have been tested by the ;
vendor. Heat exchanger designs chosen will have accumulated many .
hours of operation in the field. Accelerated testing of the whole !
unit in this case, as suggested by the NRC staff would not be beneficial beyond the check-out test runs.
Para. 3 Accelerated surveillance test frequency should be determined on a ,
case by case basis as indicated in 2.0 above. i Para. 4 Should the number of failures of a diesel generator system reach: [
D11urts yalld_ Tests 3 20 n 6 100 l the following remedial action by GPUN is planned:
4.1 The above-l'miting failure criteria would be detected by our Plant Analysis Group which plans to maintain reliability '
records for the DG units, i 4.2 Plant Analysis would notify Technical Functions, Plant ,
Engineering,-and Plant Maintenance through their existing i monthly reports, if the above failure criteria were met or exceeded.
4.3 Technical Functions, Plant Engineering, and Plant Maintenance would analyse the DG records as necessary for any modes of failure'which may have occurred and determine any additional action that may be required. A report would be prepared to assess the DG unit in question and address the program ;
required for the unit to attain the minimum desired reliability of 0.95/ demand. This reliability improvement ,
program plan would be available for NRC review. l o
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4.4 A y scly data rgport will not b2 submitted. Tha reliability r::c;rds maintain:d by Plant Analysis will ba svailable at any time for NRC audit.
- Para. 5- Should the number of failures of a diesel generator system reach:
Failures Valid Tests 5 20 Ell ' 100 f; the following disqualification and requalification criteria would Vbe used:
5.1 Disqualification should be. determined upon a review by GPUN of the failure mode (s), repairs, and/or modifications implemented. This' review would include the report described' in'4.3 above~.
r 5.2 Requalification,should be determined upon a review by GPUN of.
the failure mode (s),1and repairs, and/or modifications implemented. .This review would include the report described in 4.3 above.
Pa ra . .- 6 Should a requalification program fail, the unit would be declared inoperable'and the action statement for one DG inoperable should be followed in accordance with T.S.
Para. 7- .TMI-l Technical Specifications allows 7 days cf reactor, operation
- with one DG out of service, not 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />. GPUN if oppo sed to placing an~ annual.' limit on the total accumulative time that a
. plant may operate with one D.G. inoperable. A yearly or annual limit would not, in our case;~ provide the flexibility for inspection, maintenance and overhaul.
9 ,
' Para'. 8' ' The definit' ions of valid demands and failures in Pegulatory Guide
' ( R .G .' ) 1.108, C.2.e.are concurred with unless specified otherwise.
Para. 9 Records of OG operational and failure data will be in compliance s with.R.G. l.-108_Section 3.a. DG operation and operational surveillance procedures will be modified to include a data sheet
.for operations personnel-to fill out. This form will include items. referred to in R.G. 1.108 Section 3.a. -This data sheet will
-be transmitted by operations to Plant Analysis. Plant Analysis will maintain a continuous reliability record and publish it as
.part of their monthly performance report, b -Reports of DG unit failures would be in accordance with R.G. 1.108 LSection 3.a and Attachment 1.to Table 4.8-2 should the reliability of a unit fall to levels given in above table. These reports would be available at any. time for,NRC audit.
~Rather than an annual data report submittal, GPUN recommends that NRC' review of diesel generator reliability and reliability
' improvement program reports could be more efficiently done at the site by NRC Region 1.
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.1A EMERGENCL,01[SEL GENERATOR START DATA-
-START , CAUSE- . . . .
l NO .' DATE. TIME (See_NQte 31 ' GENERATOR TIME LOADED COMMENTS
! . Eng. hours.739.1-740.5 Data sheets for 1303-4.16
(- 17 08/23/83 .0445 -- >1 hour- cosmoleted Test run for training. Engine-hours 737.5-737.9
- - NA 08/16/83 1613" --
1303-4.16 data taken 'l 18 08/12/83 1900 1303-4.16 1905-2010 .]
'NA- 08/12/83 -- '--- 0640-0710~ LQMed_La 2t4J '
- Diesel loaded onto bus due to Bus 4 loss (2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />)
NA- 08/08/83 0933 'of Power CRO. Log 19 08/02/83 10G3 1303-4.16 1001-t107 NA' 58/01/83 '0259 -- .9 hour1.041667e-4 days <br />0.0025 hours <br />1.488095e-5 weeks <br />3.4245e-6 months <br /> 20 07/19/83 0957 -
1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> 21 .Q6/29/83 0415 1303-4.16 0430-0530 22 16/07/83 --
1303-4.16 1225-1333 NA 9.6Z01/d1. 1302-5.30 Reauires 3 starts for each diesel
_Z}_ _Q6/01/83 __9.307 .1303-4.16 Q3.15-0420 24 15/18/83 1418
- 1418-1519 Ran for Maintenance Department 1303-4.16
._2$_ _ Q.9110/d1 0240 130 3 -4 .lft -0240-Q110
_2fL 04/01/8)._ QO20 130J-4.16 002q-9123 27 03/05/83 2123 1303-4.16 2123-2225 28 01/2948) _Q2 95___ _1303-4.16___ OZQE0111 29 12419112 JZ41___110 hLl6 0231:0135 _ _ _ _
1330-1430-30 11422Lo1J 215___ __1]a3;.L l6_ 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> NA 11/28/82..'_1330 . _ . _
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NA 11/26/82 1242 --
12.32-1249 Rellef__YAlYL QIlJ agtet._s gol a nt i tit ed._so t. oroblems.
CR0 Log 31 11/19/82 0813 __1121ddtt____ _
0813-0915 0133-0233 32 11/14/82 0125 1391-4.16 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> ^
0911 10/19/82 to 33 10/19/g.2 1301:1,16 021L_19419112 24 bQur test run 0982y Ic
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34 10/12/82 0808 ' 13 0 3 + 4 .' 16 0(Qg:091 L ,
35 19/,,14/82 0056 1303-4.16- 0956-0152 _
. Q6__16]I2/82 0232' 130U4.16' 0232-0334 i-37' 07/09/82 0357- 130}-4.16- ~ 0357-051.0~
38 .96/19/82 '1355 1303-4.16 '1315d100 NA 06/19/62 1317 13y3-4.16' '1117-1329- fdel oil leg lL._1NQLt._11
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_3 9.. 05/2248L.__2.109 CR0 Log-40 05/13/82 _Q Q07 11Q3-4.1b' 0000-0120 CR0 Log .
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42 ..93/13/82 _J 319._J 103-4.16 0344-0446 ,
_.13_ . 92411/R1 _ 93.10 ~ 13Q} LJ6 0322-0424 44 01/13/82 0200 1303-4.16 02.07-0303 0210-0310.
45 J2/13/81 Q110 1303-4 d6 I hour 1045 11/07/81:to 46 11/07/81 0919_JJ 01 - 8. 2 1145 11/08/81 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> test run 47 11/c3/81 0811 1303-4.16 0811-0941 18._ _.10/13/1L_J9.0LJ 102. L 16- 1906-1116- .
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- THI+1' ,
Paa'e 6 of 7
- 3d itlERGEMCL.QIESEC GENERATOR START DATA
. START . -CAUST 18 0 . DATE TIME (See Note 31 _ GENER&IQR TIME LOADED- ~ComENTS ~ ,
.78 .Q6/12/80 11Q32.i J 6- 2010-2240-1301-8.2 79 .g3/21/80 '1025 1301dd6 1111-.1210~ Annual insnection' 80 04/14/80 13Rl;id6 012S29145 81 ? 03/13/80 0113 1303-4.16' 0120-02'20 ,
82 02/13/80 0230 1303-4.16 0230-0331 83 01/13/80 0301- .1103-h]6 0301-049.4-84' 12/17/79 0242 1303-4.16 E52-0352 85 11/12/79 ! 0312 1303-4.16- '0312.-2419 ._.
' 86 11/10/79 1750 1303-4.16 1]$1;} ail.__ __ EAsLstar_t. _Ina4_LnJPM to orove ogerable NA 11/09/79 2226 . . _ . SLArtCd_uG_12_1QQ RPM - no._ load
~ '2230 10/09/79 to 87 10/09/79 .__2221 __SQP 1-79:60 2211 1Q110/19. SQP 1-79-6t_11 hqur._ test Tripped off during 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.run, governor linkage came,
_BfL_l0/_Q9/79 _1303-4.16 0810:1202_ _ _ _ n[f. Ran succes5{ullL L).flQur.
89 09/13/79 1303-4.16 0513-0614'
_1Q_ _._Q3/12/79 0218 '130J-4.16 '0218-D}JA 91 07/13/79 0817' 1303-4.16 0817-0922 92 ..g6/13/79 .0138 1303-4 16 0138-0211 93 _Q)f_13 / 79 1303-4.16 QJ 51._Q2}.1 LQ3ded 94 05/01/79 .__J 0 4 5 .13Q E J6__ ]Qi5-J149 -
Qtg]Ated_QMr.ahla_Aflgr chanae modification work 95 04/12/79 0116_.__ljp_];4J h_ . _ 015h _Q21h NA Q}/214Z9 _,_.13] 1 _ __._ J 33)-135Q_ . LQAded_tQ_Q2 J_.fiW 96 03/17/79 139J:dd6___ ___ .. ..._1315:1316 __
97 03/15/79 .
._.J1Ql:LJ6_ _. J 515 1415 98 .Q1491/19 13Q1 Llu__ .02 % Q310 NA 02/17/79 0925 IQad-1140 99 .02/14/79 1103:dJ e_..._ _.___ Q Q 2 5 - 0121 0982y IC
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1B 'EMEBfa[NCY ' DIESEL- GENERATOR START ' DATA Paae 1 of 8-START ,
.CAUSE -
s 'NO. ' DATE ' ' TIME ISte Note 31' GENERATOR TIME LOADED COMMENTS-1 07/29/84 0055 1303-4.16' '011Qd 214 y :-
2' 07/01/84 0120 1303-4.16 0131-Q241 3 06/28/84 1755- 1303-4.16 1211 1g36 NA .94/03/84 . _
Auto stacLdyg._tg_[$,tg31}J1a LER-84-092 ^
s 4 96/01/84 0220 1303-4.16 Ojll-Ji27 a
NA 05/25/84 QQ 3-11.10 * ^ 1651,,.161fL_ _ ._Loadgd > 5 min. 3 timet.f.qr _ljo3-11.10 Data Sheet 20 min, at 3 HW . post maint. test after oil filter NA 95/24/84 1741 1303-4.16 _l211_11.Q2 - .lgak cggair NA' 95/24/84 1215 NQ ' 10 minute run galgaded NA 15/13/11_._2240 1303-5.2* ZZiQa 1QA -
- RetuEILLg sstrice._af_Ler__11QM,2 CR0 Log 20 min. at 2 MW for 1303-5.2 (1303-5.2 requires NA Qh/1)/84 1625 1303-4.16 1430-1450 9 starts each diesell 2245-2345
___1_ . Q5/192R1 __ 2226^ 1303-4.16 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> 0530-0630 6 05/01/84 0515 1303-4.16 1.0 hour0 days <br />0 hours <br />0 weeks <br />0 months <br /> _
NA Q3ZR9fdi._._Q111_ 3 min.
_NA 04/09/84 Q))8 - 14 min. Ran'for_Rost maint. teit_ BA 412329 7 gifg2fgi_013L,__Il03-4.16 0110.A2.28 8 32/29/84 0140 1303-4.16 0147-0256 9 02/01/33 0030 13Ql & l6 QQ32dl51 10 Ql/11/J3 '0438 1393 id6__ _ ...._0135-05.15 _
11 12/01/83 0128 1303-4.16 __0.ll L R210 Loaded 0900 11/17/83-12 .1]/17/83 Q850
_ Un]Qaded_09]Q llf_ld/33_ *24 hour test 1391-8.2 Data Sheet 13 11/_]jil.3'! '
11a}-3,J 6_ __ _ _ ....1156.1010 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> test try 14 11/15/83 1303-4.16 _lj35-1310 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> test try Data Sheet
.J A 11/04/83 1320 ~ 13R} _3.16__... _))}$ 141Q_
15 1303-4.16 Q)ql q222 11/01/4 16 10/02/8',!.0014 1303-4.16 9_QI4-0111-
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- s
-Paae"2 of 8-18' EMERGENCY DIESEL'GENEilATOR START bATA' CAUSE -' , *
" START .
NO. DATE ' TIME {$ee Note 31 GENERATQB TIME LQADED -
COMMENTS ~
-1 1 09/22/83 0900
'1303-11.10 LIR.83-027. 3 starts-for 1303-11.10~
~
NA 09/16/83 -
- ~, - Data Sheet f ; 17 99/12/83 1738 1303-4.16 1718-1740- Eng.ine hours on log _ShCCL.1110E5_87.6-882h run time 18 09/01/81 0423 042.3-0526
>NA' 08'17/83
/ 1640 - 1301.h16 20 min.
-- 19 08/17/83 J19_ 1 hQur_29_Elias _ LlDCWD_fDC_Lia_S1AQdby Initially had fuel oil leak, ran 2 minutes.
20 08/11/83 1117 1301:1&l6 1130-1231 engine hours (80.&82.71 <
Data Sheet l
NA Q8/09/83 0 85 0.__.._11Q3 ,_bl6 ' NQ' fuel'oIi _lcaLLNQ11_U NA 09/08/83 .0528 Check for fugl_.in.jecLQI lcaks 21 08/01/83 0510 0$22 Q122.
fA Q21.17/a3_ 1820 _11_mf rL_.__ __._.__ -
22 ' Q_6/19I&3 __992ft ._.11QJ -4 .16 pali-Q13tt _ . . _ _
23 16/22/d3. .__ ! 1Q 5 1303-4;16. 13Qjli-1195 ---
1302-5.30 NA 06/22/83 115ft_J 07-3 2 4 an u u . ..._.__ _ __ l tMe' 1107-3 NA p6/22/83 1302-5.30 1191 U15 . _ _
24 .Qo/01/83 0045 1303-4.16 005529290 . ._
- Started for electricians, filled in 1303-4.16 Data 25 05/3]/.81 __Q955
- A950_]050. _ _ _Jtigets 26 05/28/83 '1145 1)QJ ,iJ.n_ 1 J.)gu t _. ._ _ _
27 11/27/83 0955
- l_ flour 1 lALyr. 25.rfiirl __._"f 0CEA1CL._tal anc j na NA 95/2.3/11 1322
- _ . .J l ntin,. ,__ ____ _ _ 'fgr_yftCallD0_ChCgk s _
NA 05/24/81, _1120
. 21, Mllh- . _. . - "for vibration checks NA 95/24/83 0937
- _ _ _ _ J 2._ m 10 , _ ___ _ _ "for vibrat.ipn checks NA 05/20/83 1144
- 1144-11')0 _ _, .
"_Lqaded to 3 MWe for Maint. Dept.
NA 05/12/41 1127 1393-hj6 _]J 2hlM y ___ ..
NA 05/18/81 1241 34_n.11nm . _ _LQlded to 3 PMg ,fgt. tillnb._Qc )t .
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y TABLE 1 THI-1 IB EMERGENCY DIE $fL aQiERATOR START DATA Paae 5 of 8 START CAUSE NO. DATE TIME (See Note 3) GQlERATOR TIME LQADED COMMENTS 53 32/11/82 1423 130); j6 1421:1110 Breaker triong1 3 pen (FAILURE) _
NA 02/11/82 1019 1303-4.16 1019-1246 For Maint. Dept.
NA 12/02/81 1040 1051_] 1.] Q.
54 11/24/81 0855 __1101 9 J 6 __.__ __Q#55:1QM__.
55 11/23/81 130):3.ds __ Liaj.-1112 1303-4.1o & 1505 11/21/81 to Jik__l.lI21/81 .505 1301 4 L._ .
_.,_. _ _ 1251_L]/12/gjL __ _ 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> run NA 11/21/81 0300 01QQ;QJ21 NA 11/21/81 0150 0112-Q2Jb NA ._Ll/2]/jll_Ql.Q 5 Q1Q501]Q .
_3A 11/20_/11 __2103 2203-2210 Loaded and unloaded listed in Log.
NA 11/20/81 1953 2016;1914 For balancina not spggific ahpWLitAtts Loaded and unloaded listed in Log, NA 11/20/81 1600 Ifill;.lki$ _._ .f2E._hal anc i na noLSDRCif_1C._AboWLSLAEti-Loaded and unloaded listed in Log,
_RA 11/20/11 1134-1343 fgE balancina ngl $pgtific abou LitALLS Loaded and unloaded listed in Log, NA 11/20/81 1303-1308 For balancina not specific abouLstaEls Loaded and unloaded listed in Log.
NA 11/2918.1 1391 bl6 1139-1149 For balancina no kspeciffE._3b9u litar.L1 Loaded and unloaded listed in Log, NA 11/20/81 1303-4J6 1051-1113 For balancina ngLspecific_dbout starts 57 11/20/81 1391;id6 Q31g;1200 58 .lgIQnIB_L _ 1396 Illi-1211 _ . _ . . _ _ _ _ _ _
oata sheet NA 10/02/81 1191:id 6_,__. 1847-1858 59 .19102/82 _1122__ _ __13 01 -L I ft__ 1136:1136 _ - _ _
_no 09/12/81 []QJ;i,1h 0410_Ri]1 ___
61 09/02/81 1847 130];dJ6 1854-1959 For coerability after_perforfung ))Ql:5.1
_62 09/02/81 ,_L} Q1-iJ 6
_ 051Q:0658 63 08/07/81 2297 139J:4ds 2215:2 115 64 07/17/81 2115 13Al _iJ h__ 112];2227 0982y ic
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' 1B EMERGENCY DIESEL GENEllATOR START DATA ' Pane 7 of 8 START . .CAUSE NO. 'DATE TIME (See Note 31' CENERATOR TIME LOADED COMMENTS ~
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- NA 01/30/81 ~1303-4.16 2012-2021
'NA 01/30/81 "1303-4.16 '1942-1949' NA 01/30/81 1303-4.16 1915-1922 76 01/20/81 1335' T1303-4.16 1311-J111 ,
77 01/14/81 0845 *1103-4.16 '0845-1018 " Annual surveillange 1301-8.2 and
'NA 01/13/81 1400 13Q3-4.16 14J6did6' Irlangd manually by A.O.
78 12/13/80 0100 _))Q7-4.16 l1,1121 79 11/13/80 0124 13Q3-4.16 0124-Q224 80 10/13/80 13R3d db QQJ1.0116_ 81 .99411dQ._ QJ00 1303-4 J6 03QfL-q111 82 .AgflQfj0 1717 1303-4J6 1726-1847 NA 08/22/80 0931 $/D 0947. dges not specifically stalg._1[_]Q3dtd NA 08/22/8Q. __0530 Ran. had tach. oroklems. Blaced in standbv NA 08/21/80 At time 1435 listed as at 3 MW At 3.MW 83 . 08/21/80 0.221 19.50-1154 0912_.lgadedJ n_1 MW 1
- Tripped at.1435 due to no governor control -
NA 08/20Z81 1425 _ltgukleibgotina l'
- Tripped at-1416 due to no governor control -
NA _ gg[ZQdQ_ 1413 .lr.gyhlgihgglino
*Trtoped at 1407 due to no governor control -
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'F' ,4 . TABLE 1
.; Notes
- 1. 'It hasialways been the philosophy to shut.down the diesel immediately,
' even'for minor problems anditake corrective action before continuing.
There were.no: requirements to make an assessment as to whether or not the diesel would have _been able 'to fulfill .its function if there had been a-L need to continue diesel generator operation. In almost every case, tachometer problems, a leaking fuel oil return tube, fuel injector leak,
' jacket coolant relief valve lift, or smoking or flashing at the exhaust manifold would not be serious enough to necessitate shutting down the diesel-generator in,an emergency; condition if emergency power-were needed.
- 2. 'In.almost every case,~the type of exhaust manifold _ fire experienced by
.TMI-l diesel generators could readily be extinguished by the diesel operator without an interruption of service if emergency power were fneeded. In 1982, In order to prevent exhaust manifold fires from occurring, GPUN replaced exhaust manifold insulation and gaskets at
'va'rious flange joints.with aaterials. recommended by the manufacturer, Fairbanks Horse,:and made procedural changes to bar the engine to prevent oil- from entering the exhaust. We are evaluating.the effectiveness of these changes.
- 3. Procedure-
Reference:
c No. Title f 1303-4.16 Emergency Power System
'1303-11.10 ; Engineered Safeguards Emergency Sequence and Power Transfer Test 1303-5.2 Load Sequence and Component Test and HPI Logic Channel Test 1303-5.1 RB Cooling and Isolaton System Logic Channel and
~ Component Test
-1303-8.2 Diesel Generator Annual Inspection 1302-5.30- Diesel Generator Protective Relaying
-SOP-1-79-60 .4 2 Hour Load _ Test of Emergency Generators 1107-3 Diesel Generator 0982y Ic
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_ TABLE 2 , The-fo'llowing' annual overhaul and~ Preventive' Maintenance tasks ~are performed t; 7on THI-1-Emergency Diesel Generator Units: MECHANICAL' INSPECTIONS: a) l'njection nozzles '
'm) torsional dampers b) fuel lines. n) attach. pump drives c) exhaust manifold- o) gournor.
'd) air manifold p) air start system
- e): _ turbo-charger' q) vertical drive r) flower drive
'- ~. f) - piston rings & cylinders g) crankshaft & bearings s) . air blower h) cam. shaft assembly, t) filters ,
- 1) crank strain u) water-. system j)-_ crank lead v) fan drive assembly k) timing' chain w) supports
- 1) engine timing LiLECTRICAL INSPECTIO C:
1a)- generator cleanlines's 1) pre-insp./ post-insp. vibration
'b) . collector rings & brushes analysis.- balance if required c) checkt timer settings '
'- j )- relay cabinet insp. - skid mounted cd)-:BF0 relay overtravel test cab & exciter cabinet e) calibrate ~ synchronizing volt- k) test molded case breakers on skid meters: mounted AC distribution panel
- f) calibrate frequency meters- 1) DC motor insp. fuel oli transfer g). ~ calibrate megawatt. meters- pump h) " generator outboard bearing .m)- inspect & tes'. 4160 VAC breakers n). grease all aux. motors o)- change gen. bearing oil p)'-test protective relays q) megger aux. motors t
INSTRUMENTATION INSPECTIONS: a): 11ube ollLtemp.' alarm calibration ~h) low air pressure alarm cal.
=b) Ljacket coolant temp. alarm cal. 1) cranking air press. cal.
c) water heater thermostat cal. j) low jacket _ coolant press. alarm cal. d) fan gear box; thermostat cal. k) air compressor start-stop cal. e)- low oil press. alarm & shut-down 1) expansion tank low level alarm cal. cal. (both normal &Llow speed m) low lube oil level alarm cal. press. swltches) *n) -all engine mounted = temperature &
.. f ) ~ crankcase pressure alarm & shut-
~
pressure indicators calibrations _down cal. g) fuel oil low press. alarm cal.
'* engine mounted PIs &-tis are calibrated every two years
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