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Forwards Info Re Valid & non-valid Diesel Generator Failures Updated Summary of Diesel Generator 1DG01KB Performance Since Successful Completion of pre-operational Testing,Per NUREG-1223
	ML20213G502
Person / Time
Site:	Braidwood
Issue date:	04/22/1987
From:	Hunsader S; COMMONWEALTH EDISON CO.
To:	Davis A; NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
	RTR-NUREG-1223 2992K, NUDOCS 8705180321
	Download: ML20213G502 (11)
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Commonwealth Edison ff

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' Address Reply to: Post Offce Box 7C N.

Chicago, Illinois 60690 0767 PR!0AlffROUf!N3 April 22, 1987

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bghP Mr. A. Bert Davis i

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Regional Administrator flLE lYg5 U.S. Nuclear Regulatory Commission Region III 799 Roosevelt Road Glen Ellyn, IL 60137

Subject:

Braidwood Unit 1 Diesel Generator 1DG0lKB Failure NRC Docket No. 50-456

Reference:

(a) NUREG-1223, Technical Specification, dated October, 1986 (b) February 3, 1987 S. C. Hunsader letter to J. G. Keppler

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,

. S. C. Hunsader Nuclear Licensing Administrator bs cc: Braidwood Resident Inspector 2992K B705180321 870422 PDR ADOCK 05000456 S

PDR

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TEOI NPR 27 y

CWS/87-69 FilOs AGNC-14 SYS-DG-2 ATTACHMENT A Braidwood Station's IB diesel generator is currently being run on a weekly basis per operating surveillance 1BwCS 8.1.1.2.a-2.

On December 29, 1986 and December 30, 1986, the IB diesel generator failed to start during performance of maintenance and troubleshooting runs. The IB diesel generator was painted from December 20, 1986 through December 29, 1986. Af ter the two troubleshooting failures, it was determined that a speed sensing lead from the diesel generator to the local control panel had been stepped on and was subsequently damaged. The lead was repaired and diesel generator operability tests were successfully completed on January 2, 1987. These were the 8th and 9th invalid test failures since the completion of pre-operational testing.

On January 28, 1987 at 0600, the 1B diesel generator tripped during performance of a maintenance and troubleshooting run. The cause of the invalid failure was the lack of clearance between the 10L cylinder connecting rod hich temperature trip lever and the connecting rod.

The 10L cylinder connecting rod high temperature trip lever was replaced during the 1B diesel generator maintenance outage which preceeded the troubleshooting failure. The clearance on the 10L cylinder connecting rod high temperature trip lever was corrected and the IB diesel generator successfully completed operability testing on January 29, 1987. This was the 10th invalid test failure since the completion of pre-operational testing.

At 1825 on February 19, 1987, the IB diesel generator was shutdown during performance of the monthly operability surveillance 1BwCS 8.1.1.2.a-2 when an indicating test cock valve failed. The indicating test cock valve is used for attaching the engine analyzer to measure peak firing and compression pressures. There is an indicating test cock valve on each of the diesel generator's twenty cylinders. The indicating test cock failure was caused by vibration and fatigue. The indicating test cock was replaced and the diesel generator was declared operable following completion of a troubleshooting and a successful operability surveillance run on February 20, 1987. All the indicating test cock valves have been replaced on both Unit 1 diesel generators, as a precautionary measure. The test cock failure was the 8th valid failure since the completion of Pre-operational testing.

The corrective actions taken to address the existing failures on the IB diesel generator have been successful in preventing the recurrence of identical failures.

Due to the relative diversity of the failures, no trends have been estaolished and major, general, corrective actions are not warranted at this time.

(4795z)/2

CNS/87-69 Filot AGNC-14 SYS-DG-2 The 18 diesel generator will be started weekly for a 20 week duration per Technical Specification Table 4.8-1.

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.

Braidwood Station is confident that, through the weekly operability surveillance runs and continued close examination of the engine and its components, the diesel generator's reliability can be demonstrated. The 1A and IB diesel generators have met all testing and operability requirements of position C.2 of Regulatory Guide 1.108.

(4795 )/3

CNS/87-69

~Filot. AGMC-14 SYS-DG-2.

1,2,3...... = Valid Failures I,II,III... = Invalid Failures ATTACHMENT B Summary of IB Diesel Generator Starts Activity Date Activity 1) 8-10-86 Performed Load Reject Surveillance, IBwVS 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 loaded to 5500 kw for < 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months .

Invalid Test -

Successful 3) 8-11-86 Performed 18 month diesel generator inspection, IBwVS 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, IBwvS 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 (4795z)/4

CWS/87-69 F110: AGNC-14 SYS-DG-2 ATTACHMENT B Summary of IB Diesel Generator Starts Activity Date Activity

11) 9-30-86 Performed diesel generator auto-start on SI signal surveillance, 1BwVS 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 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

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, 1BwVS 8.1.1.2.f-10.

Diesel generator was not loaded.

Invalid Test -

Successful

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

Diesel generator was run for less 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,1BwOS 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

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, IBwCS 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 than one hour.

Invalid Test - Successful 20) 10-05-86 Operating performed the semi-annual operability surveillance, IBwCS 8.1.1.2.1-4.

Valid Test -

Successful i

21) 10-06-86 Ran SI signal override of Test Mode Surveillance, IBwVS 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 1BwVS 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 (4795z)/5

?

CWS/87-69 Filot AGMC-14 SYS-DG-2 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 1BwVS 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 adjustmen".s 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 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-2.

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 houc.

Invalid Test - Successful 32) 10-24-86 Operating performed the monthly operability surveillance, IBw0S 8.1.1.2.a-2.

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

Failure (5)

(4795:)/6

CWS/87-69 Filos AGNC-14 SYS-DG-2 ATTACHMENT B Sunmary of IB Diesel Generator Starts Activity Date Activity

33) 10-31-86 Diesel generator was starteu 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, IBwOS 8.1.1.2.a-2.

Valid Test -

Successful

36) 11-07-86 Operating performed the Monthly Operability Surveillance, 1BwOS 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 1BwCS 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 IBwCS 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)

(4795z)/7

.. ?

CWS/87-69 Filer AGNC-14 SYS-DG-2 ATTACHMENT B Sununary 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 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

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)

(4795z)/8

CWS/87-69 Filo:..AGNC-14.

SYS-DG 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 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 at 5500 kw.

Valid Test -

Successful 54) 12-17-86 Operating performed monthly operability surveillance 1BwOS 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 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 of 5500 kw.

Valid Test - Successful 59) 1-08-87 Operating performed 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 of 5500 kw.

Valid Test - Successful 60) 1-16-87 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 of 5500 kw.

Valid Test - Successful (4795z)/9

1 CNS/87-69 i

' Fila: AGNC,

SYS-DG-2 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 generatcr 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 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 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 5500 kw.

Valid Test - Successful 69) 2-12-87 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 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 (4795z)/10

f.

-CNS/87-69 File: AGNC-14~

.SYS-DG-2 ATTACHMENT B I

Summary of 1B Diesel Generator Starts Activity Date Activity 71) 2-19-87 The diesel generator was started for Monthly Operability Surveillance 1BwCS 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) 72) 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 (4795z)/11

-.

ML20213G502

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