0CAN078222, Forwards Info on Outages of Eccs,Per NUREG-0737, Item II.K.3.17,in Response to 820324 Request for Addl Info

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Forwards Info on Outages of Eccs,Per NUREG-0737, Item II.K.3.17,in Response to 820324 Request for Addl Info
ML20058J751
Person / Time
Site: Arkansas Nuclear  Entergy icon.png
Issue date: 07/26/1982
From: John Marshall
ARKANSAS POWER & LIGHT CO.
To: Eisenhut D
Office of Nuclear Reactor Regulation
References
RTR-NUREG-0737, RTR-NUREG-737, TASK-2.K.3.17, TASK-TM 0CAN078222, CAN78222, NUDOCS 8208110196
Download: ML20058J751 (26)
v • d • e


Text

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.- * .- .e ARKANSAS POWER & LIGHT COMPANY POST OF FICE GOX SS1 LITTLE ROCK. ARKANSAS 72203 (5011371-4000 July 26, 1982 l

l OCAN078222 Mr. Darrell G. Eisenhut, Director Division of Licensing i Office of Nuclear Reactor Regulation l U. S. Nuclear Regulatory Commission

Washington, D. C. 20555 1

SUBJECT:

Arkansas Nuclear One - Units 1 & 2 Docket Nos. 50-313 & 50-368 License Nos. DPR-51 & NPF-6 i

NUREG-0737, Item No. II.K.3.17 l Report on Outages of Emergency Core Cooling (ECC) Systems Gentlemen:

In accordance with your letter dated March 24, 1982, (2CNA038206)

! requesting additional information on outages of ECC systems, attached are detailed reports for Arkansas Nuclear One - Unit 1 (Attachment 1) and Unit 2 (Attachment 2). These reports contain a complete summary of each component outage in the ECC and diesel generator systems for the five years of plant operation through 1980.

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l Very truly yours, t.

John R. Marshall Manager, Licensing JRM:Hgsc Attachments l

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8208110196 820726 PDR ADOCh 05000313 MEMot" M'oote sours uTiutts cysTru P PDR

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l ATTACHMENT 1 REPORT ON OUTAGE OF DIESEL GENERATOR OR ECC SYSTEM COMP 0NENTS I

FOR ARKANSAS NUCLEAR ONE UNIT-1 I

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I DATE: 11/26/75 DURATION: 8.2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> ECC SYSTEM OR COMP 0NENT: No. 2 Diesel Generator MODE OF OPERATION: Power Operation TRAIN AFFECTED: Green CAUSE: During testing of No. 2 Diesel Generator, an oil leak developed at the oil cooler outlet flange. An 0-ring gasket had failed.

No. 1 Diesel Generator was operable.

CORRECTIVE ACTION: Replaced o-ring

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REFERENCE:

LER 50-313/75-009)

DATE: 5/11/76 i DURATION: 0.4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> ECC SYSTEM OR COMPONENT: No. 1 Diesel Generator MODE OF OPERATION: Cold Shutdown TRAIN AFFECTED: Red CAUSE: Diesel Generator No. 1 failed to start on simulated E.S.

Actuation during checks preparatory to integrated E.S. test.

CORRECTIVE ACTION: Diode was replaced in auto-start circuit.

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REFERENCE:

LER 50-313/76-008) l l

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DATE: 10/3/76 DURATION: 10.9 hours1.041667e-4 days <br />0.0025 hours <br />1.488095e-5 weeks <br />3.4245e-6 months <br /> ECC SYSTEM OR COMP 0NENT: Primary Makeup Pumps 'B' & 'C' MODE OF OPERATION: Power Operation TRAIN AFFECTED: Green and Swing CAUSE: Primary makeup pump removed from service due to pipe weld leak in the suction relief line. Redundant pump (P368) placed in service; however, pump discharge pressure degraded, due to impleller failure, after approximately 1.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> of service.

Pump P36C was returned to E.S. standby until the following day, then was removed from service for leak repair, leaving one operable makeup pump.

CORRECTIVE ACTION: Primary makeup pump 'C' suction relief line pipe weld leak repaired. Pump returned to service, giving the two required pumps operable status.

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REFERENCE:

LER's 50-313/76-029 and 76-030) i DATE: 11/22/76 DURATION: 20.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> ECC SYSTEM OR COMPONENT: No. 1 Diesel Generator MODE OF OPERATION: Power Operation TRAIN AFFECTED: Red CAUSE: An inadvertant trip of the fire system deluge while being returned to service rendered Diesel Generator No. 1 inoperative due to wet control circuitry. The cause was an apparent leak off of sealing pressure to the deluge valve when the system was

, taken out of the service for modifications.

CORRECTIVE ACTION: The engine control cabinet and exciter control cabinet were dried and the generator and cables were

, meggered for proper readings.

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REFERENCE:

LER 50-313/76-033) l 2

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DATE: 10/23/77 DURATION: 11.0 hours0 days <br />0 hours <br />0 weeks <br />0 months <br /> ECC SYSTEM OR COMPONENT: No. 1 Diesel Generator MODE OF OPERATION: Power Operation TRAIN AFFECTED: Red CAUSE: The No. 1 Diesel Generator failed to start during monthly test.

The starter failure time delay relay set point had drifted causing the air starters to cycle before they could start the diesel. Also, Diode CR-1 was found shorted.

CORRECTIVE ACTION: The Diode was replaced and the relay set point was properly set.

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REFERENCE:

LER 50-313/77-020)

DATE: 11/22/77 DURATION: 52.3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> ECC SYSTEM OR COMPONENT: Reactor Building Emergency Cooling Fan MODE OF OPERATION: Power Operation TRAIN AFFECTED: N/A CAUSE: Reactor building emergency cooling fan inoperable where the two remaining cooling fans were not powered from operable independent emergency buses. Cooling fan motor failed due to lack of bearing lubrication.

CORRECTIVE ACTION: Unit was brought to cold shutdown conditions as required by the conditions of the technical specifications limiting conditions for operations.

All cooling fans were inspected and repaired, as necessary. A lubrication requirement was added to the fan preventive maintenance program. Outage time was 361 hours0.00418 days <br />0.1 hours <br />5.968915e-4 weeks <br />1.373605e-4 months <br />.

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REFERENCE:

LER 50-313/77-021) 3

DATE: 3/20/78 DURATION: 59.4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> ECC SYSTEM OR COMPONENT: No. 2 Diesel Generator MODE OF OPERATION: Refueling Shutdown TRAIN AFFECTED: Green CAUSE: During a test of the No. 2 Diesel Generator it was manually tripped due to abnormal indications. Fire from exhaust stake, then smoke alarm was noted. Fire was present.inside turbo charger. Probable cause of fire was failure of the bearing between the air inlet blading and exhaust turbine blading of the engine turbocharger. The subsequent failure of the bearing oil seal allowed lube oil into exhause, which ignited.

CORRECTIVE ACTION
Turbocharger was replaced.

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REFERENCE:

LER 50-313/78-008)

DATE: 7/28/78 DURATION: 6.4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> ECC SYSTEM OR COMPONENT: No. 2 Diesel Generator MODE OF OPERATION: Power Operation TRAIN AFFECTED: Green CAUSE: During monthly surveillance operational test, Diesel Generator No. 2 was removed from the line due to excessive smoke in turbocharger area. The smoke was caused by an oil seal leak on the turbocharger at a rate of 5 drops per minute. Vendor representative confirmed unit could be operated; therefore, unit was declared operational.

CORRECTIVE ACTION: The turbocharger was replaced 7/28/78.

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REFERENCE:

LER 50-313/78-017) l l

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DATE: 9/26/78 DURATION: 12.8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> ECC SYSTEM OR COMPONENT: Borated Water Storage Tank MODE OF OPERATION: Power Operation TRAIN AFFECTED: N/A CAUSE: Borated water storage tank boron concentration less than the -

technical specifications required 2270 ppmb due to unidentified causes.

CORRECTIVE ACTION: Boron concentration increased to required amount.

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REFERENCE:

LER 50-313/78-026)

DATE: 11/21/78 DURATION: 23.6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> ECC SYSTEM OR COMPONENT: Borated Water Storage Tank MODE OF OPERATION: Power Operation TRAIN AFFECTED: N/A CAUSE: Borated water storage tank boron concentration less than the technical specifications required 2270 ppmb due to condensate valve misaligment.

CORRECTIVE ACTION: Closed valve and increased boron concentration to required amount.

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REFERENCE:

LER 50-313/78-030) 5

DATE: 8/27/79 DURATION: 102.6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> ECC SYSTEM OR COMPONENT: No. 2 Diesel Generator H0DE OF OPERATION: Power Operation TRAIN AFFECTED: Green

-CAUSE: During the monthly surveillance operational test, Diesel Generator No. 2 tripped on oil pressure after three minutes of operation. The diesel lube oil cooler was leaking allowing water to enter the oil system. The water vaporized on unit operation causing a high crankcase pressure which tripped the engine.

CORRECTIVE ACTION: Replaced oil cooler.

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REFERENCE:

LER 50-313/79-016)

DATE: 9/11/79 DURATION: 48.9 hours1.041667e-4 days <br />0.0025 hours <br />1.488095e-5 weeks <br />3.4245e-6 months <br /> ECC SYSTEM OR COMPONENT: No. 1 Diesel Generator MODE OF OPERATION: Power Operation TRAIN AFFECTED: Red CAUSE: During the monthly surveillance operational test, Diesel Generator No. 1 tripped on oil pressure after three minutes of operation. The diesel lube oil cooler was leaking allowing water to enter the oil system. .The water vaporized on unit operation causing a high crankcase pressure which tripped the engine.

CORRECTIVE ACTION: Replaced lube oil cooler.

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REFERENCE:

LER 50-313/79-017) 6 L

DATE: 10/8/79 DURATION: 1.8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> ECC SYSTEM OR COMP 0NENT: Engineered Safety Feature Valve Associated with Sodium Hydroxide ES Operation.

MODE OF OPERATION: Power Operation TRAIN AFFECTED: Red CAUSE: Sodium hydroxide tank discharge valve, CV1617, declared inoperable due to a control power fuse failure caused by a control wire being pinched and grounded to the valve operator cover. Valve failed in the ES position (open).

CORRECTIVE ACTION: Valve operator was repaired and maintenance personnel were cautioned.

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REFERENCE:

LER 50-313/79-018)

DATE: 4/7/80 DURATION: 6.7 hours8.101852e-5 days <br />0.00194 hours <br />1.157407e-5 weeks <br />2.6635e-6 months <br /> ECC SYSTEM OR COMP 0NENT: Loop 'B' High Pressure Injection Valve MODE OF OPERATION: Power Operation TRAIN AFFECTED: Green CAUSE: High pressure injection valve, CV-1227, failed to open on demand due to the valve operator manual engaging level stuck in the engaged position.

CORRECTIVE ACTION: Valve operator repaired and returned to service.

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REFERENCE:

LER 50-313/80-013) l l

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DATE: 8/27/80 DURATION: 18.65 hours7.523148e-4 days <br />0.0181 hours <br />1.074735e-4 weeks <br />2.47325e-5 months <br /> ECC SYSTEM OR COMP 0NENT: No. 2 Diesel Generator MODE OF OPERATION: Power Operation TRAIN AFFECTED: Green CAUSE: Diesel Generator No. 2 secured approximately 7 minutes into the monthly surveillance operational test. Excessive smoke was observed coming from the turbocharger exhaust flange. Loose exhaust flange bolts and a broken exhaust flange gasket allowed lube oil to come in contact with exhause gas.

CORRECTIVE ACTION: Replaced gasket and added flange bolt inspection to preventive maintenance schedule.

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REFERENCE:

LER 50-313/80-031)

DATE: 10/13/80 DURATION: 12.2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> ECC SYSTEM OR COMPONENT: No. 1 Diesel Generator MODE OF OPERATION: Power Operation TRAIN AFFECTED: Red CAUSE: During testing of the No. 1 Diesel Generator, it's voltage regulator failed to respond to a higher or lower signal. The cause was an inoperable voltage regulator. Regulator failure was due to internal mechanical wear.

4 CORRECTIVE ACTION: Replaced voltage regulator.

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REFERENCE:

LER 50-313/80-038)

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DATE: 1975-1980 DURATION: 4.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> total time ECC SYSTEM OR COMPONENT: Diesel Generators MODE OF OPERATION: Appear Listed Below CAUSE: Prior to diesel start during the monthly operational surveillance test the selector switch on the local panel is placed on maintenance, cylinder drain cocks are opened and the diesel generator is turned over one turn. The maintenance turn is required to check for oil or water in the culinders prior to diesel start. During this portion of the operational surveillance test the diesel generator cannot respond to an ES actuation signal. Drain cocks must be closed and local panel returned to auto before diesel start will occur. Prior to November 1979, diesel generator surveillance tests were performed on an annual basis, thereafter, tests were performed on a monthly basis. The maintenance portion of the surveillance test takes approximately 5 minutes. Test dates for the diesel generators are listed below (year-month-day).

Diesel Generator Test Date Mode of Operation Train Affected 1

750101 Cold Shutdown Red 750101 Cold Shutdown Green 1 760101 Cold Shutdown Red 760101 Cold Shutdown Green 770101 Power Operation Red 770101 Power Operation Green

780101 Power Operation Red 780101 Power Operation Green 791102 Cold Shutdown Green 791103 Cold Shutdown Red 791113 Cold Shutdown Red 791127 Power Operation Green 791213 Power Operation Red 791227 Power Operation Green i 800113 Cold Shutdown Red l 800127 Cold Shutdown Green 800213 Power Operation Red i

800227 Power Operation Green 800227 Power Operation Red 800313 Power Operation Red 800327 Power Operation Green 800403 Power Operation Red 800403 Power Operation Green l 800413 Power Operation Red 800424 Cold Shutdown Red 800427 Cold Shutdown Green 800430 Cold Shutdown Red l 800513 Cold Shutdown Red l 800527 Cold Shutdown Green 9

800613 Cold Shutdown Red 800627 Cold Shutdown Green 800713 Power Operation Red 800727 Cold Shutdown Red 800728 Cold Shutdown Green 800802 Cold Shutdown Green 800813 Power Operation Red 800827 Power Operation Green 800827 Power Operation Red 800913 Cold Shutdown Red 800927 Heat Up Green 801013 Power Operation Red 801013 Power Operation Green 801113 Power Operation Red 801113 Power Operation Green 801114 Power Operation Green 801114 Power Operation Red 801119 Power Operation Green 801119 Power Operation Red 801120 Power Operation Red 801127 Power Operation Green 801213 Power Operation Red 801215 Power Operation Green 801227 Power Operation Green CORRECTIVE ACTION: Only one diesel generator is tested at a time. An operator remains in the vicinity of the diesel generator during the pre-start maintenance turn.

Should ES actuation occur during that portion of the surveillance test the operator could return the diesel generator to service.

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REFERENCE:

Procedure 1104.36 Sop. 1) h O

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f DATE: 1975-1980 OURATION: 12.2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> total time based upon an approximate test length of 17 minutes.

ECC SYSTEM OR COMPONENT: Low Pressure Injection Pump MODE OF OPERATION: Appear Listed Below CAUSE: Performance of the monthly operational surveillance test requires alignment of the pump discharge to the test and recirculation header. An ES actuation signal during the surveillance test would start the low pressure injection pump, however, low pressure injection would not occur. Closure of the low pressure injection pump discharge to test and recirculaiton header isolation valve would be required for low pressure injection. Prior to November 1979, operational surveillance tests were performed on an annual bas'.s. Since that time they have been performed on a monthly basis.

Approximate test length is 17 minutes. Individual test dates for 'A' and 'B' low pressure injection pumps are listed below (year-month-day).

P-34A TRAIN AFFECTED: Red P-34B TRAIN EFFECTED: Green i

Date Mode of Operation Date Mode of Operation 750101 Cold Shutdown 750101 Cold Shutdown 760101 Cold Shutdown 760101 Cold Shutdown 770101 Power Operation 770101 Power Operation 780101 Power Operation 780101 Power Operation 790101 Cold Shutdown 790101 Cold Shutdown 791117 Cold Shutdown 791110 Cold Shutdown 791218 Power Operation 791203 Power Operation 800117 Cold Shutdown 800109 Cold Shutdown 800119 Cold Shutdown 800206 Cold Shutdown 800217 Power Operation 800303 Power Operation 800317 Power Operation 800403 Power Operation 800417 Power Operation 800502 Cold Shutdown 800522 Cold Shutdown 800606 Cold Shutdown

, 800605 Cold Shutdown 800703 Power Operation t' 800617 Power Operation 800804 Power Operation 800623 Power Operation 800903 Power Operation i

800804 Power Operation 800925 Cold Shutdown 800817 Power Operation 801003 Power Operation l 800926 Cold Shutdown 801103 Power Operation l 801017 Power Operation 801203 Power Operation Power Operation 801117

801217 Power Operation 801218 Power Operation 11 1

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CORRECTIVE ACTION: Only one loop of the low pressure injection system is tested at a time. An operator is required to remain in the vicinity of the lower pressure injection pump being tested at all times during the test. Should ES' actuation occur during the surveillance test the operator could return the pump to service.

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REFERENCE:

Procedure 1104.004) 12 i

ATTACHMENT 2 REPORT ON OUTAGE OF DIESEL GENERATOR OR ECC SYSTEM COMP 0NENTS FOR ARKANSAS NUCLEAR ONE UNIT-2 l

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DATE: 9/16/78 DURATION: 18.1 hours1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> ECC SYSTEM OR COMPONENT: Refueling Water Tank MODE OF OPERATION: 3 TRAIN AFFECTED: N/A CAUSE: Refueling water tank level below technical specifications required 91.7% (indicated) one to inadvertant ECC system actuation caused by a loss of relay power to ECC system components due to an injector failure.

CORRECTIVE ACTION: Unit taken to cold shutdown conditions and refueling water tank level increased to required level.

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REFERENCE:

LER 50-368/78-006)

DATE: 11/9/78 DURATION: N/A ECC SYSTEM OR COMP 0NENT: No. 1 Diesel Generator MODE OF OPERATION: 5&6 TRAIN AFFECTED: Red CAUSE: A dramatic change in engine acoustics was noticed during a surveillance. The enginee tripped before it could be unloaded.

This was due to bearing damage.

CORRECTIVE ACTION: The damage was repaired and the diesel proved operable.

DATE: 12/17/78 DURATION: 15.2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> ECC SYSlEM OR COMPONENT: No. 2 Diesel Generator MODE OF OPERATION: 2&3 TRAIN AFFECTED: Green CAUSE: The Diesel Generator was out of service while performing preventing maintenance.

CORRECTIVE ACTION: Verify operability after the preventive maintenance.

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DATE: 1/30/79 DURATION: 0.1 hours1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> ECC SYSTEM OR COMPONENT: Safety Injection Tank 'D' MODE OF OPERATION: 1 TRAIN AFFECTED: N/A CAUSE: Safety injection tank pressure below technical specification

required 600 psig due to past system check valve.

CORRECTIVE ACTION: Safety injection tank pressure was immediately restored. Valve maintenance was completed.

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REFERENCE:

LER 50-368/79-016)

DATE: 3/30/79 DURATION: 12.9 hours1.041667e-4 days <br />0.0025 hours <br />1.488095e-5 weeks <br />3.4245e-6 months <br /> i ECC SYSTEM OR COMP 0NENT: High Pressure Safety Injection Header 'A' 4

MODE OF OPERATION: 3 TRAIN AFFECTED: N/A CAUSE: High pressure safety injection header removed from service to allow maintenance on the header relief valve.

CORRECTIVE ACTION: Complete maintenance on relief valve and return header to service.

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REFERENCE:

LER 50-368/79-027) 2 4

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DATE: 4/19/79 DURATION: 23.73 hours8.449074e-4 days <br />0.0203 hours <br />1.207011e-4 weeks <br />2.77765e-5 months <br /> ECC SYSTEM OR COMPONENT: No. 2 Diesel Generator MODE OF OPERATION: 5 TRAIN AFFECTED: Green CAUSE: Excessive engine vibration during a surveillance. Vibration was due to bearings being improperly located relative to the position of journals of the crank.

CORRECTIVE ACTION: The main bearing caps were relocated and extensive load testing performed.

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REFERENCE:

LER 50-368/79-32)

DATE: 8/14/79 DURATION: 8.42 hours4.861111e-4 days <br />0.0117 hours <br />6.944444e-5 weeks <br />1.5981e-5 months <br /> ECC SYSTEM OR COMPONENT: No. 2 Olesel Generator MODE OF OPERATION: 1 TRAIN AFFECTED: Green CAUSE: Following a surveillance test the diesel could not be secured from the control room. This was due to an internal spring on the handswitch contacts being out of adjustment.

CORRECTIVE ACTION: Proper adjustment was made and the diesel was proved operable.

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REFERENCE:

LER 50-368/76-69) 3

DATE: 8/26/79

DURATION
1.7 hours8.101852e-5 days <br />0.00194 hours <br />1.157407e-5 weeks <br />2.6635e-6 months <br /> ECC SYSTEM OR COMPONENT: Safety Injection Tank 'D' MODE OF OPERATION: 1 TRAIN AFFECTED: N/A CAUSE: Safety injection tank level below technical specifications required 80.1% due to makeup valve failing to open on command.

CORRECTIVE ACTION: Makeup valve was manually opened and level was returned to normal. Valve maintenance was completed.

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REFERENCE:

LER 50-368/79-077)

DATE: 9/25/79 DURATION: 0.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> ECC SYSTEM OR COMP 0NENT: Refueling Water Tank MODE OF OPERATION: 1 TRAIN AFFECTED: N/A CAUSE: Refueling water tank boron concentration less than the technical specifications required 1749 ppmb due to incorrect tank makeup calculated baron concentration. Inaccuracy due to insufficient mixing prior to tank sampling.

, CORRECTIVE ACTION: Procedure modification to require tank volume i recirculation prior to sampling for boron analysis for RWT makeup concentration purposes.

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REFERENCE:

LER 50-368/79-085) t 1

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DATE: 2/22/80 DURATION: N/A ECC SYSTEM OR COMP 0NENT: No. 1 Diesel Generator MODE OF OPERATION: 5 TRAIN AFFECTED: Red CAUSE: During a surveillance test high vibration and load oscillations were experienced. This was caused by a sheared generator rotor shaft.

f CORRECTIVE ACTION: The generator shaft was replaced and the diesel generator was proved cperable.

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REFERENCE:

LER 50-368/80-12)

DATE: 6/3/80 DURATION: 3.4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> ECC SYSTEM OR COMPONENT: Safety Injection Tanks 'C' & 'D' MODE OF OPERATION: 1 TRAIN AFFECTED: N/A CAUSE: Safety injection tank boron concentration less than the

technical specifications requirec 1731 ppmb.

CORRECTIVE ACTION: Increase tank boron concentration.

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REFERENCE:

LER 50-368/80-037) i I

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DATE: 6/7/80 DURATION: 2.0 hours0 days <br />0 hours <br />0 weeks <br />0 months <br /> i ECC SYSTEM OR COMPONENT: Safety Injection Tank 'D' MODE OF OPERATION: 3 TRAIN AFFECTED: N/A CAUSE: Safety injection tank boron concentration less than technical specifications required 1731 ppmb.

CORRECTIVE ACTION: Increase boron concentration of safety injection tank.

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REFERENCE:

8.ER 50-368/80-038) i t

DATE: 7/1/80 DURATION: 9.6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />

! ECC SYSTEM OR COMPONENT: Safety Injection Tank 'C' MODE OF OPERATION: 3 TRAIN AFFECTED: N/A l

CAUSE: Safety injection tank boron concentration less than the technical specifications required 1731 ppmb.

CORRECTIVE ACTION: Increase boron concentration of safety injection i tank.

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REFERENCE:

LER 50-368/80-044) .

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DATE: 7/2/80

DURATION: 7.2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> i

ECC SYSTEM OR COMPONENT: Safety Injection Tank 'D' MODE OF OPERATION- 1 TRAIN AFFECTED: N/A CAUSE: Safety injection tank boron concentration less than the technical specifications required 1731 ppmb.

CORRECTIVE ACTION: Increase boron concentration of safety injection tank.

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REFERENCE:

LER 50-368/80-044)

DATE: 9/2/80 DURATION: 10.9 hours1.041667e-4 days <br />0.0025 hours <br />1.488095e-5 weeks <br />3.4245e-6 months <br /> ECC SYSTEM OR COMP 0NENT: Safety Injection Tanks 'A' & 'C' MODE OF OPERATION: 1 TRAIN AFFECTED: N/A CAUSE: Safety injection tank boron concentrations less than the technical specifications required 1731 ppmb due to dilution of

! the tank makeup path during extended shutdown cooling system operation.

i CORRECTIVE ACTION: Increase tank boron concentration and administrative controls to ensure accurate boron concentration values of makeup. .

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REFERENCE:

LER 50-368/80-044 Rev. 1) i l

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DATE: 10/7/80 .

DURATION: 0.8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> Safety Injection Tank 'A' ECC SYSTEM OR COMP 0NENT:

MODE OF OPERATION: .1 TRAIN AFFECTED: N/A CAUSE: Safety injection tank pressure below technical specifications required 600 psig due to volume loss during sampling without capability of remote repressurization caused by inoperable valve.

I CORRECTIVE ACTION: Safety injection tank pressure was restored. Valve maintenance was completed.

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REFERENCE:

LER 50-368/80-075)

. DATE: 10/14/80 DURATION: 0.1 hours1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> ECC SYSTEM OR COMP 0NENT: High Pressure Safety Injection Pump 'B' MODE OF OPERATION: 3 TRAIN AFFECTED: Green CAUSE: High pressure safety injection (HPSI) pump tripped on overcurrent due to a motor bearing misalignment.

CORRECTIVE ACTION: Complete corrective maintenance on pump motor. Line up redundant HPSI pump to flow path.

i LER 50-368/80-078)

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REFERENCE:

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DATE: 11/29/80 DURATION: 6.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> ECC SYSTEM OR COMPONENT: High Pressure Safety Injection (HPSI) Valve, 2CV-5056 MODE OF OPERATION: 1 TRAIN AFFECTED: Orange CAUSE: HPSI valve failed to close and could not be remotely throttled to meet HPSI system flow requirements.

CORRECTIVE ACTION: Valve operator failure caused by a blown control power fuse. Fuse was replaced and valve returned to operable status.

(

REFERENCE:

LER 50-368/80-087)

DATE
12/20/80 DURATION: 0.08 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> ECC SYSTEM OR COMP 0NENT: No. 2 Diesel Generator MODE OF OPERATION: 3 TRAIN AFFECTED: Green

! CAUSE: The emergency diesel generator tripped on reverse power on breaker closure. This was due to manually increasing load too slowly. " -

l CORRECTIVE ACTION: The importance of applying load quickly to the i

emergency diesel generator during the evolution was discussed with all operators.

f (

REFERENCE:

LER 50-358/80-93) l l

l l

l l

9 i

i DATE: 12/20/80 DURATION: 5.9 hours1.041667e-4 days <br />0.0025 hours <br />1.488095e-5 weeks <br />3.4245e-6 months <br /> ECC SYSTEM OR COMPONENT: Refueling Water Tank ,,

MODE OF OPERATION: 3 TRAIN AFFECTED: All Trains , ,

CAUSE: RWT level indications inoperable due to frozen transmitters ', ,

caused by very low ambient temperatures and a de-energized heat tracing circuit.

' \-

CORRECTIVE ACTION: Reactor was shutdown to mode 3 operation. The level J transmitters were thawed out and the heat tracing circuits re-energized.

(

REFERENCE:

LER 50-368/80-091)

Unit 2 DATE: 1978-1980 ,

DURATION: Approximately 0.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> per pump per test (total duration 14.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br />) 4 ECC SYSTEM OR COMP 0riENT: Sodium Hydroxide Pump 2P136A/B MODE OF OPERATION: Appear Listed Below t .

~

CAUSE: During surveillance testing the valve lineup does not permit d ,

full flow sodium hydroxide.

CORRECTIVE ACTION: During the-surveillance an operator is stationed in the area in order to return the system to full flow;'t .,

)'

conditions if needed. Also, it should be noted that th' full flow conditions could be returned within approximately five minutes. Specific dates of

, occurence are listed below (year-month-day).

I I

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4 2P-136-A TRAIN AFFECTED: RED 2P-136-B TRAIN AFFECTED: GREEN Date Mode of Operation Date Mode of Operation 780101 , 5 780101 5 790101 ', 1 790101 1 800104 1 800119 1 800204 5 800218 5

' ',- 800304 5 800319 3

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800403 , 1 800418 3 800502 1 800516 1 800601' 1 800616 1

i. *800702' 1 800716 1 f

,,  ! 800716' l 800815 1 t

800818 1 800918 5 800902 1 ~801018 1 801005 l' 801118 -

1 801103 3- 801219 1 801203 1 DATE: 1978-1980 4 .

l DURATION: Approximately 0.17 hours1.967593e-4 days <br />0.00472 hours <br />2.810847e-5 weeks <br />6.4685e-6 months <br /> pe'r pump per test.(total duration 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />)

ECC SYSTEM OR COMPONENT:' Sodium Hydroxide Tank CAUSE: Duringsurveillancetestingthevalveiineupdoesnotpermit

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full flow from sodium hydroxide tank with the associated pump.

CORRECTIVE ACTION: During the surveillance test an operator is stationed in the area in order to return the system to full flow conditions if needed. Also, it should be noted l r. that the pump could be returned-to service within approximately five minutes. Specific dates of occurence are listed below.

Mode of Operation , Train Affected 780101 5 All Trains 790101 1 All Trains 600204 5 All Trains 800505 1 All Trains 800808 1 , All Trains 801108 1

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'All Trains I

11 3' s

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