Text

Forwards Updated Summary of Diesel Generator 1DG01KB Performance Since Successful Completion of Properational Testing
	ML20210C760
Person / Time
Site:	Braidwood
Issue date:	04/28/1987
From:	Hunsader S; COMMONWEALTH EDISON CO.
To:	Davis A; NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
	2992K, NUDOCS 8705060300
	Download: ML20210C760 (13)
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) Commonwealth Edison m

One First National Plaza, Chicago, Illinois

,7 Address Reply t2 Post Omco Box 767

/ Chicago, Illinois 60690 0767 PRICRITY W U April 28, 1987 C

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4 wK WA y

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-V_E Mr. A. Bert Davis flEU Regional Administrator U.S. Nuclear Regulatory Commission Region III 799 Roosevelt Road Glen Ellyn, IL 60137

Subject:

Braidwood Unit 1 Diesel Generator IDG0lKB Failure NRC Docket No. 50-456

Reference:

(a) NUREG-1223, Technical Specification, dated October, 1986 (b) April 22, 1987 S. C. Hunsader letter to A. B. Davis

Dear Mr. Davis:

Section 4.8.1.1.3 of reference (a) requires that all diesel generator failures, valid or non-valid, be reported to the NRC pursuant to specification 6.9.2.

Attachment "A" provides an update of failures since the submittal of reference (b).

Attachment "B" provides an updated summary of diesel generator IDG0lKB's performance since the successful completion of pre-operational testing.

Please direct any questions concerning this matter to this office.

Very truly yours,

/

nudw S. C. Hunsader Nuclear Licensing Administrator bs cc: Braidwood Resident Inspector 2992K APR 3 01987 B705060300 B70428 PDR ADOCK 05000456 S

PDR gg

CWS/87-116 On 3-11-87 at 0246, the IB diesel generator was shutdown 23 hours2.662037e-4 days 0.00639 hours 3.80291e-5 weeks 8.7515e-6 months into a cumulative 100 hour0.00116 days 0.0278 hours 1.653439e-4 weeks 3.805e-5 months run to perform maintenance on three loose fuel injectors. At the completion of the work, the IB diesel generator failed to start during performance of a maintenance / troubleshooting run. The IB diesel generator tripped on

" Incomplete Sequence" approximately 30 seconds after receiving a start signal.

After two additional start attempts yielding the same i

type of failure, it was determined that the isolation valve for the lube oil pressure pneumatic trip switch was throttled almost completely closed. This prevented the lube oil pressure switch from resetting prior to the diesel generator's lock out timer expiring.

The result was a depressurization of the control air trip header and 4

the subsequent failures. Operating personnel mistakenly throttled the lube oil pressure switch isolation valve in an attempt to dampen oscillations in the fuel oil filter differential pressure gauge. A complete valve line-up was performed on the IB diesel generator and i

a modification was initiated for the installation of pressure snubbers on the fuel oil filter differential pressure instrument sensing lines. The IB diesel generator was declared operable at 0306 on 3-12-87, after successful completion of operability testing. These were the lith, 12th, and 13th invalid test failures since the completion of pre-operational testing.

On 3-16-87 at 0715, the IB diesel generator tripped on " Reverse Power" during the performance of a maintenance / troubleshooting run.

Following the completion of the 100 hour0.00116 days 0.0278 hours 1.653439e-4 weeks 3.805e-5 months cumulative run, a j

maintenance outage was entered to perform a rocker-arm /crosshead inspection.

In addition, the isochronous mode relay was replaced in an attempt to improve minor load fluctuations when running the diesel generator in the test mode. The replacement relay increased the amount of load fluctuations. When the operator attempted to unload the diesel generator, it responded too quickly, resulting in a " reverse power" trip. The relay was replaced again. The new j

relay's contact resistance was lower than the previous relay and eliminated the load fluctuations. After successful completion of j

operability testing, the IB diesel generator was declared operable at 0115 on 3-18-87.

A modification to replace the isochronous mode i

relay with a different, more reliable relay has been initiated. The i

invalid failure was the 14th since the completion of pre-operational testing.

l The corrective actions taken to address the existing failures on the IB diesel generator have been successful in preventing recurrence of identical failures. Due to the relative diversity of the failures, no identifiable trends have been noted.

r l

The IB diesel generator has been on a monthly start schedule since 4-10-87.

The IB diesel generator's performance has shown improvement, twenty successful valid starts have been achieved with one valid failure. Therefore, per Technical Specification Table 4.8-1, the IB diesel generator will be started every 31 days to verify operability.

l (50523)

CWS/87-ll6 The diesel generators are inspected during every operability run. Any problems that develop are corrected in a timely manner.

Braidwood Station believes that this approach is appropriate to maintain proper diesel generator availability and operability. The 1A and 18 diesel generators have met all testing and operability requirements of position C.2 of Regulatory Guide 1.108.

l

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'i CWS/87-116

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y 1,2,3...... = Valid Failures

,,f I,II,III... = Inval d Failures ATTACHMENT B f-Summary of IB Diesel Generator Starts Activity 1

Date Activity 1) 8-10-86 Performed Load Reject Surveillance,13wvS'8.1.1.2.f-12.

Strip chart recorder did not trace.

Invalid Test -

Successful 2) 8-10;-86 Performed Load Reject Surveillance, IBwVS 8.1.1.2.f-12.

Engine loade'd to 5500 kw for < 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months . Invalid Test -

", Saccessful,r l

t 3) 8-11-36 Performed IB month diesel generator inspection, 1BwVS 8.1.2.e-2 to check peak firing and compression pressures. Run at 5500 kw for 7 hours8.101852e-5 days 0.00194 hours 1.157407e-5 weeks 2.6635e-6 months . Valid Test -

Successful 4) 9-10-86 ' Attempted to complete 18 month diesel generator inspection, IBwVS 8.1.1.2.e-2.

Diesel generator tripped on " Incomplete Sequence". Cause was improper fuel priming. Valid Test - Failure (1) 5)

9-10-86 Engine was started and tripped on " Incomplete Sequence". Troubleshooting Run - Invalid Test -

Failure (I) 6)

9-13-86 Ran. diesel generator unloaded for 5 minutes.

Troubleshooting Run - Invalid Test - Successful 7) 9-13-86 Ran diesel generator unloaded for 8 minutes.

Troubleshooting Run - Invalid Test - Successful 8) 9-21-86 Ran diesel generator to complete 18 month inspection, 1BwvS 8.1.1.2.e-2.

Ran diesel generator 5500 kw for 4.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months . Valid Test - Successful 9) 9-22-86 Attempted Auto-Start Surveillance of diesel generator 1BwVS 8.1.1.-2.f-8.

Diesel generator tripped on

" Incomplete Sequence".

Loss of fuel prime problem.

Valid Test - Failure (2)

10) 9-29-86 Diesel generator run to check repairs on fuel system.

Troubleshooting Run - Invalid Test - Successful (5052z)

CWS/87-116 ATTACHMENT B Summary of IB Diesel Generator Starts Activity Date Activity

11) 9-30-86 Performed diesel generator auto-start on SI signal surveillance, IBwVS 8.1.1.2.f-8.

Diesel was run for less than 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months . Invalid Test - Successful 4

12) 9-30-86 Diesel generator run for less than 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months to check fuel prime.

Invalid Test - Successful 1

13) 10-01-86 Diesel generator run for less than 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months to check fuel prime.

Invalid Test - Successful

14) 10-02-86 Performed Trip Bypass Surveillance, IBwVS 8.1.1.2.f-10.

Diesel generator was not loaded. Invalid Test -

Successful j

15) 10-02-86 Performed final section of Trip Bypass Surveillance, 1BwVS 8.1.1.2.f-10.

Diesel generator was run for less 4

than 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months unloaded.

Invalid Test - Successful

16) 10-02-86 Performed Alternate AC Power Surveillance, IBwOS

~3 8.1.1.1.b-1.

Diesel generator was run at 500 kw for less than 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months . Invalid Test - Successful i

.17) 10-02-86 Diesel generator run for 12 minutes unloaded to check frequency. Invalid Test - Successful

18) 10-04-86 Operating attempted to run operability surveillance, IBwOS 8.1.1.2.a-4 Diesel generator did not start.

Valid Test - Failure (3)

19) 10-05-86 Ran SI signal override of Test Mode Surveillance.

IBwVS 8.1.1.2.f-20.

Diesel generator was run for less j

than one hour. Invalid Test - Successful

20) 10-05-86 Operating performed the semi-annual operability surveillance, 1BwCS 8.1.1.2.1-4.

Valid Test -

Successful i

21) 10-06-86 Ran SI. signal override of Test Mode Surveillance, 1BwVS 8.1.1.2.f.-20.

Invalid Test - Successful 22) 10-14-86 Start diesel for 24 hour2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months loaded run per IBwVS 8.1.1.s.f-14.

Stopped diesel after 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months loaded due to cylinder noise. Valid Test - Successful (5052z)

CWS/87-ll6 ATTACHMENT B Summary of IB Diesel Generator Starts Activity Date Activity 23) 10-14-86 Started diesel for 24 hour2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months loaded run per IBwVS 8.1.1.2.f-14.

Valid Test - Successful 24) 10-15-86 Diesel generator was started on an undervoltage and SI signal following the 24 hour2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months run per 1BwVS 8.1.1.2.f-14.

Governor response to loads was unsatisfactory. Diesel was shutdown. Governor adjustments made. Valid Test -

Failure (4) 25) 10-12-86 Started the IB diesel generator for speed servo governor adjustment. Troubleshooting Run - Invalid Test - Successful 26) 10-17-86 Started the diesel on an SI signal to adjust governor in the Emergency Mode. Troubleshooting Run - Invalid Test - Successful 27) 10-17-86 Started and loaded the diesel generator to 5500 kw for 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months for the auto-actuation portion of l

BwvS 8.1.1.2.f-14.

Invalid Test - Successful 28) 10-17-86 Diesel generator emergency started for surveillance 1BwVS 8.1.1.2.f-14.

Invalid Test - Successful 29) 10-19-86 Diesel generator was started on an undervoltage signal for surveillance 1BwVS 8.1.1.2.f-16.

Engine was run for 7 minutes and stopped. One strip chart channel did not record. Invalid Test - Successful 30) 10-19-86 Diesel generator was auto started on undervoltage signal per 1BwVS 8.1.1.2.f-1.

Diesel generator was run for less than one hour.

Invalid Test - Successful 31) 10-19-86 Operating performed Alternate AC power Supply Surveillance. The diesel generator was run for less than one hour.

Invalid Test - Successful 32) 10-24-86 Operating performed the monthly operability surveillance, 1BwCS 8.1,1,2.a-2.

The operator recorded an 11 second start with a stopwatch. Valid Test -

Failure (5)

(5052z)

CWS/87-ll6 ATTACHMENT B Summary of IB Diesel Generator Starts Activity Date Activity 33) 10-31-86 Diesel generator was started to troubleshoot start time. Strip chart connections were lose causing erroneous diesel engine indication.

DG was stopped.

Troubleshooting Run - Invalid Test - Failure.

(II) 34) 11-01-86 Diesel generator was started to check strip chart connection problem. DG was run for less than 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months .

Troubleshooting Run - Invalid test - Successful 35) 11-01-86 Diesel generator was started for Monthly Operability Surveillance, 1BwOS 8.1.1.2.a-2.

Valid Test -

Successful 36) 11-07-86 Operating performed the Monthly Operability Surveillance, 1BwCS 8.1.1.2.a-2.

Operator recorded a 13.2 second start with a stopwatch. Valid Test -

failure (6) 37) 11-08-86 Monthly Operability Surveillance 1BwOS 8.1.1.2.a-2 was performed with strip chart recorder to investigate start time. Diesel generator started within limits and was run for greater than 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months at 5500 kw.

Valid Test

- Successful 38) 11-11-86 Performed Operability Surveillance 1BwOS 8.1.1.2.a-2.

Diesel generator run for greater than 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months at 5500 kw.

Valid Test - Successful 39) 11-21-86 Diesel generator was started after tightening air start valves and adjusting timing. Diesel generator tripped on incomplete sequence. Troubleshooting Run - Invalid Test - Failure (III) 40) 11-23-86 Diesel generator was run to investigate incomplete sequence trip. Diesel generator trips on incomplete sequence. Troubleshooting Run - Invalid Test -

Failure (IV)

41) 11-23-86 Diesel generator was run to investigate Incomplete Sequence Trip. Diesel generator tripped on incomplete sequence. Troubleshooting Run - Invalid Test -

Failure (V)

(50522)

- ~.

CWS/87-ll6 ATTACHMENT B Summary of IB Diesel Generator Starts Activity Date Activity

42) 11-23-86 Diesel generator was run to investigate Incomplete Sequence Trip. Engine was run for 7 minutes with a jumper installed. Troubleshooting Run - Invalid Test -

Successful

43) 11-25-86 Diesel generator was run to investigate Incomplete Sequence Trip. Diesel generator tripped on incomplete sequence. Troubleshooting Run - Invalid Test -

Failure (VI)

44) 11-25-86 Diesel generator was run to investigate Incomplete Sequence Trip. Diesel generator tripped on incomplete sequence. Troubleshooting Run - Invalid Test -

Failure (VII) 45) 11-26-86 Diesel generator was run to investigate incomplete sequence trip. Engine was run for 10 minutes with a jumper installed. Troubleshooting Run - Invalid Test -

Successful 46) 11-26-86 Diesel generator was run to investigate incomplete sequence trip. DG was run for greater than 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months at 5500 kw.

Troubleshooting Run - Invalid Test -

Successful

47) 11-26-86 Operating performed the Monthly Operability Surveillance IBwOS 8.1.1.2.a-2.

Diesel generator was run for greater than 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months at 5500 kw.

Valid Test -

Successful 48) 12-02-86 Operating performed the Monthly Operating Surveillance 1BwOS 8.1.1.2.a-2.

Diesel generator was run for greater than 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months at 5500 kw.

Valid Test - Successful 49) 12-09-86 Diesel generator was started on a quarterly slave relay surveillance. Diesel Generator was run for less than 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months .

Invalid Test - Successful 50) 12-09-86 Operating performed the Monthly Operability Surveillance. The diesel generator output breaker did not close. Valid Test - Failure (7)

(50522)

CWS/87-116 ATTACHMENT B Summary of IB Diesel Generator Starts Activity Date Activity

51) 12-10-86 Diesel generator started to troubleshoot output breaker. Breaker functioned properly. Diesel generator was run for less than one hour.

Troubleshooting Run - Invalid Test - Successful 52) 12-10-86 Diesel generator was started on a quarterly slave relay surveillance. Diesel generator was run for less than 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months . Invalid Test - Successful

53) 12-10-86 Operating performed the Monthly Operability Surveillance IBwOS 8.1.1.2.a-2.

Diesel generator was run for greater than 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months at 5500 kw.

Valid Test -

Successful

54) 12-17-86 Operating performed monthly operability surveillance 1BwCS 8.1.1.2.a-2.

Diesel generator was run for grater than 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months at 5500 kw.

Valid Test - Successful

55) 12-29-86 Performed a maintenance troubleshooting run. The diesel generator tripped on incomplete sequence.

Troubleshooting Run - Invalid Test - Failure (VIII)

56) 12-30-86 Performed a troubleshooting run on the incomplete sequence trip. The diesel generator tripped on incomplete sequence. Troubleshooting Run - Invalid Test - Failure (IX) 57) 1-02-87 Performed a maintenance, troubleshooting run.

Troubleshooting Run - Invalid Test - Successful 58) 1-02-87 Operating performed Monthly Operability Surveillance 1BwCS 8.1.1.2.a-2.

Diesel Generator was run for greater than 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months of 5500 kw.

Valid Test - Successful 59) 1-08-87 Operating performed Monthly Operability Surveillance 1BwCS 8.1.1.2.a-2.

Diesel Generator was run for greater than 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months of 5500 kw.

Valid Test - Successful 60) 1-16-87 Operating performed Monthly Operability Surveillance 1BwCS 8.1.1.2.a-2.

Diesel Generator was run for greater than 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months .of 5500 kw.

Valid Test - Successful (5052z)

CWS/87-116 ATTACHMENT B Summary of IB Diesel Generator Starts Activity Date Activity 61) 1-28-87 Performed a maintenance, troubleshooting test following a maintenance outage. The diesel generator tripped on

" Main and Conn. Rod Brg. Temp. Hi".

Invalid Test -

Failure (X) 62) 1-28-87 Performed a maintenance, troubleshooting test. The diesel generator was run for 5 minutes and stopped to investigate strip chart recorders.

Invalid Test -

Successful 63) 1-29-87 Performed a maintenance, troubleshooting test. The diesel generator was run for 10 minutes and stopped to investigate strip chart recorder ground. Invalid Test

- Successful 64) 1-29-87 Performed a maintenance, troubleshooting test. The diesel generator was run for 15 minutes and stopped after determined strip chart recorders functioned correctly.

Invalid Test - Successful 65) 1-29-87 Performed diesel generator modification test M20-1-86-003-1.

The diesel generator was run at approximately 1000 kw for 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months and 45 minutes.

Invalid Test - Successful 66) 1-29-87 Operating performed Monthly Operability Surveillance 1BwOS 8.1,1.2.a-2.

Diesel Generator was run for greater than 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months at 5500 kw.

Valid Test - Successful 67) 1-31-87 Diesel Generator was run for 5 minutes to verify proper field flash indication.

Invalid Test - Successful 68) 2-05-87 Operating performed Monthly Operability Surveillance 1BwOS 8.1.1.2.a-2.

Diesel Generator was run for greater than 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months at 5600 kw.

Valid Test - Successful 69) 2-12-87 Operating performed Monthly Operability Surveillance 1BwOS 8.1.1.2.a-2.

Diesel Generator was run for greater than 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months at 5500 kw.

Valid Test - Successful 70) 2-13-87 The diesel generator was auto-started on a simulated SI signal for surveillance testing and run for 20 minutes unloaded.

Invalid Test - Successful (50522)

CWS/87-ll6 ATTACHMDIT B Summary of IB Diesel Generator Starts Activity Date Activity 71) 2-19-87 The diesel generator was started for Monthly Operability Surveillance 1BwOS 8.1.1.2.a-2.

The diesel generator was shutdown after 25 minutes when a Kiene indicating cock valve failed.

Valid Test - Failure (8) 73) 2-20-87 Performed a maintenance, troubleshooting test after replacement of the failed indicating valve. The diesel generator was run for 50 minutes at 5500 kw.

Invalid Test - Successful 73) 2-20-87 Performed the Monthly Operability Surveillance 1BwCS 8.1.1.2.a-2.

The diesel generator was run for greater than 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months at 5500 kw.

Valid Test - Successful 74) 2-27-87 Performed the Monthly Operability Surveillance 1BwCS 8.1.1.2.a-2.

The diesel generator was run for greater than 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months at 5500 kw.

Valid Test - Successful 75) 3-02-87 Performed a maintenance, troubleshooting run after the replacement of the 8L cylinder fuel line. The diesel generator was run for 30 minutes at 5500 kw.

Invalid Test - Successful 76) 3-02-87 Performed the Monthly Operability Surveillance IBwOS 8.1.1.2.a-2.

The diesei generator was run for greater than 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months at 5500 kw.

Valid Test - Successful 77) 3-10-87 Maintenance, Troubleshooting run after replacement of 20 Kiene indicating valves. The diesel generator was run for 30 minutes at 5500 kw.

Invalid Test -

Successful.

78) 3-10-87 Diesel Generator was run for 23 hours2.662037e-4 days 0.00639 hours 3.80291e-5 weeks 8.7515e-6 months at full load as to part of the 100 hour0.00116 days 0.0278 hours 1.653439e-4 weeks 3.805e-5 months cumulative run.

The IB diesel 3-11-87 generator was shutdown to repair minor fuel injector leaks on 3 cylinders. Valid Test - Successful.

79) 3-11-87 Attempted to run diesel generator for maintenance, troubleshooting run following fuel injector line repairs. Diesel generator tripped on " Incomplete Sequence" after approximately 1 minute. Invalid Test -

Failure (XI)

(5052z)

CWS/87-116 i

ATTACHMENT B Summary of 1B Diesel Generator Starts Activity Date Activity 80) 3-11-87 Attempted to run the diesel generator for a maintenance, troubleshcoting test. The diesel generator tripped on " Incomplete Sequence" after approximately 1 minute. Invalid Test - Failure (XII) 81) 3-11-87 Attempted to run the diesel generator for a maintenance, troubleshooting test. The diesel generator tripped on " Incomplete Sequence" after approximately 1 minute. Invalid Test - Failure (XIII) 82) 3-12-87 Started the diesel generator for maintenance, troubleshooting after correcting instrument valve line-up. The diesel generator was run for 10 minutes at 5500 kw.

Invalid Test - Successful 83) 3-12-87 The diesel generator was run for approximately 77 hours8.912037e-4 days 0.0214 hours 1.273148e-4 weeks 2.92985e-5 months to at 5500 kw to complete the 100 hour0.00116 days 0.0278 hours 1.653439e-4 weeks 3.805e-5 months cumulative run.

3-15-87 Valid Test - Successful 84) 3-16-87 Performed a maintenance, troubleshooting run after rocker arm inspections and relay replacement. The diesel generator tripped on " Generator Reverse Power" after running for 45 minutes at 5500 kw.

Invalid Test

- Failure (XIV) 85) 3-17-87 Performed a maintenance, troubleshooting run to investigate load fluctuations. The diesel generator was run for 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months at varying loads.

Invalid Test -

Successful 86) 3-17-87 Performed a maintenance, troubleshooting run to investigate load fluctuations. The diesel generator was run for 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months at varying loads.

Invalid Test -

Successful.

87) 3-17-87 Performed a maintenance, troubleshooting run following the isochronous mode relay replacement. The diesel generator was run for 45 minutes at 5500 kw.

Invalid Test - Successful 88) 3-17-87 Performed the Monthly Operability Surveillance I

1BwOS 8.1.1.2.a-2.

The diesel generator was run for greater than 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months at 5500 kw.

Valid Test - Successful (5052z)

CWS/87-ll6 ATTACHMENT B

. Summary of IB Diesel Generator Starts Activity Date Activity 89) 3-24-87 Performed the Monthly Operability Surveillance 1BwOS 8.1.1.2.a-2.

The diesel generator was run for greater than 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months at 5500 kw.

Valid Test - Successful 90) 3-28-87 Performed a maintenance, troubleshooting following valve tappet adjustments. The diesel generator was run for 45 minutes at 5500 kw.

Invalid Test - Successful 91) 3-28-87 Performed the Monthly Operability Surveillance 1BwOS 8.1.1.2.a-2.

The diesel generator was run for greater than 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months at 5500 kw.

Valid Test - Successful 92) 3-29-87 Diesel Generator was run for 20 minutes to check leakage on fuel oil relief valve.

Invalid Test -

Successful 93) 3-29-87 Diesel Generator was run for 15 minutes to check leakage on fuel oil relief valve.

Invalid Test -

Successful 94) 4-03-87 Performed the Monthly Operability Surveillance 1BwCS 8.1.1.2.a-2.

The diesel generator was run for greater than 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months at 5500 kw.

Valid Test - Successful 95) 4-04-87 Performed a maintenance, troubleshooting run following replacement of the 7L fuel injector due to minor leakage. The diesel generator was run for 30 minutes at 5500 kw.

Invalid Test - Successful 3

96) 4-05-87 Performed the Monthly Operability Surveillance 1BwCS 8.1.1.2.a-2.

The diesel generator was run for greater than 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months at 5500 kw.

Valid Test - Successful 97) 4-05-87 Perform a maintenance, troubleshooting start following calibration of the vibration shutdown press switch.

The diesel was run for 15 minutes unloaded.

Invalid Test - Successful 98) 4-10-87 Performed the Monthly Operability Surveillance 1BwOS 8.1.1.2.a-2.

The diesel generator was run for greater than 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months at 5500 kw.

Valid Test - Successful (5052z)

_ _ _

ML20210C760

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