ML20106G469

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Annual Operating Rept 1995
ML20106G469
Person / Time
Site: Comanche Peak  Luminant icon.png
Issue date: 12/31/1995
From: Terry C
TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
TXX-96018, NUDOCS 9603050182
Download: ML20106G469 (24)
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Text

9

=N=== Log # TXX-96018 l

== File # 10250 l h j Ref. # 10CFR50.36 r Z '

1UELECTRIC February 28,19%

7 Gmur We President U. S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, DC 20555

SUBJECT:

COMANCHE PEAK STEAM ELECTRIC STATION (CPSES)-

UNITS 1 AND 2 l DOCKET NOS. 50 445 AND 50 446 ANNUAL OPERATING REPORT FOR 1995 Gentlemen:

Attached is the CPSES Annual Operating Report for 1995 prepared and submitted j pursuant to Technical Specification 6.9.1.2 contained in Appendix A to the Comanche Peak Steam Electric Station Unit 1 Operating License NPF-87 and Unit 2 Operating License NPF 89. This attachment also complies with the annual operating report guidance provided in position C.1.b of U.S. NRC ,

Regulatory Guide 1.16 Revision 4.

If you have any questions, please contact Mr. Jacob M. Kulangara at (214) 812-8818.

Sincerely, ,

1 C. L. Terry By: /

f S. Marshall Generic Licensing Manager JMK/jmk Attachment c- Mr. L. J. Callan, Region IV ,

Mr. W. D. Johnson, Region IV i 1

Mr. T. J. Polich, NRR Resident Inspector, CPSES Ms. M. L. Thomas REIRS Project Manager (W/ Original copy of the Personnel Exposure & Monitoring report) 9603050182 951231 PDR ADOCK 05000445 R ,,, ,_ PDR ,,

Energy Plau 1601 Bryan Street Dallas, Texas 75201-3411 i

Attachment to TXX %018 Page 1 of 23 l

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l COMANCHE PEAK STEAM ELECTRIC STATION 1

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ANNUAL OPERATING REPORT 1995 i

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TEXAS UTILITIES ELECTRIC COMPANY l

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$ttachment to TXX %018 -

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TABLE OF CONTENTS i

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1.0 Sumary of Operating Experience 2.0 Outages and Reductions in Power 3.0 Personnel Exposure and Monitoring Report 4.0 Report of Results of Specific Activity Analysis in which the Primary  :

Coolant Exceeded the Limits of Technical Specification 3.4.7 5.0 Irradiated Fuel Inspection Results 6.0 Outage Related Single Radioactivity Release or Radiation Exposure to an Individual that Accounts for More than 10 Percent of Allowable Annual Values 1

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Attachment to TXX %018  ;

Page 3 of 23 i 1.0 SU H RY OF OPERATING EXPERIENCE The Comanche Peak Steam Electric Station (CPSES) is a dual unit pressurized water reactor power plant, each unit licensed at 3411 Megawatt thermal (MWt).

It is located in Somervell County in North Central Texas approximately 65 ,

miles southwest of the Dallas Fort Worth Metropolitan area. .The nuclear steam l supply system was purchased from Westinghouse Electric Corporation and is rated for a 3425 mit output.

1.1 CPSES UNIT 1 CPSES Unit 1 achieved initial criticality on April 3.1990. Initial power generation occurred on April 24, 1990, and the plant was declared commercial on August 13, 1990. Since being declared commercial CPSES Unit 1 has generated 39,167,193 net Megawatt hours (MWH) of electricity as of December 31, 1995, with a net unit. capacity factor of 72.2% (using MDC). The unit and reactor availability factors were 85.0% and 87.9%, respectively, for the year 1995.

On March 3.1995, power reduction was initiated for the unit for its fourth refueling outage and the main turbine was tripped on March 4,1995, for the outage. Overall, the outage was successful in its implementation with a duration of 46 days. Ninety six fresh fuel assemblies were loaded for Cycle 1

5. The unit was returned to service on April 18, 1995. l Figure 1.11 provides the generation profile of the average daily net electrical output of Unit 1 for 1995. Table 1.1-1 is a compilation of the monthly summaries of the operating data and Table 1.12 contains the yearly j and total summaries of the operating data, i During the refueling outage, the major work scope completed included:

e Replacement of Main Transformer 1MT2 e Reactor Coolant Pump 1 04 Motor Changeout e Upgrade of All Four Reactor Coolant Pump Cartridge Seals e Snubber Functional Testing e Train A Residual Heat Removal Pump Coupling Design Modification e Impeller Changeout for All Four Containment Spray Pumps e Eddy Current Testing of Steam Generators 2 and 3 e- Sludge Lancing on All Four Steam Generators e Maintenance Inspections on Trains A and B Diesel Generators e Local Leak Rate Testing e Core Funnel Inspections e High Pressure Turbine Stop and Control Valve Inspections e Low Pressure Turbine Stop and Control Valve Testing e Eddy Current Testing of Low Pressure Turbine Blades e Repair Groove on Main Generator Shaft e Reactor Coolant System Check Valve Seat Leakage Testing e Trains A and B Integrated Test Sequence

Attachment to TXX 96018 Page.4 of 23 1.2 CPSES UNIT 2 CPSES Unit 2 achieved initial criticality on March 24, 1993. Initial power generation occurred on April 9.1993, and the plant was declared commercial on August 3, 1993. Since being declared commercial CPSES Unit 2 has generated 17,858,358 net Megawatt hours (MWH) of electricity as of December 31, 1995, with a net unit capacity factor of 73.5% (using MDC). The unit and reactor availability factors were 95.7% and 97.0%, respectively, for the year 1995.

On November 24, 1994, the unit was returned to service following its first refueling outage and a refueling outage was neither required nor executed for the unit in the calendar year 1995.

Figure 1.21 provides the generation profile of the average daily net electrical output of Unit 2 for 1995. Table 1.2-1 is a compilation of the i monthly summaries of the operating data and Table 1.2 2 contains the yearly l and the total sumaries of the operating data. ,

I I

2.0 OUTAGES AND REDUCTIONS IN POWER l 2.1 CPSES UNIT 1 Table 2.1 describes unit operating experience including unit shutdowns and i provides explanations of significant dips in average power levels for CPSES Unit 1.  !

I 2.2 CPSES UNIT 2 I l

Table 2.2 describes unit operating experience including unit shutdowns and provides explanations of significant dips in average power levels for CPSES Unit 2.

3.0 EXPOSURE AND MONITORING REPORT The personnel exposure and monitoring report for CPSES is provided in Table 3.0.

4.0 REPORT OF RESULTS OF SPECIFIC ACTIVITY ANALYSIS IN WHICH THE PRIMARY COOLANT EXCEEDED THE LIMITS OF TECHNICAL SPECIFICATION 3.4.7 Technical Specification 6.9.1.2.b requires the reporting of results of specific activity analyses in which the primary coolant exceeded the limits of Technical Specification 3.4.7.

CPSES Units 1 and 2 primary coolant did not exceed the limits of Technical Specification 3.4.7 for the calendar year 1995.

Attachment to TXX %018 Page 5 of 23

.0 IRRADIATED. FUEL INSPECTION RESULTS 5.1 CFSES UNIT 1 The reactor coolant fission product activity levels were carefully monitored throughout Cycle 4 operation. There were no indications of leaking fuel during steady state operation or during reactor power changes. Nonetheless, visual inspections were performed to assess the external condition of the fuel assemblies.

Visual inspections (using underwater television cameras) were performed on Unit 1 fuel assemblies which were scheduled for reload in Cycle 5 as the fuel was off loaded from the reactor into the spent fuel pool. All four faces of each fuel assembly were examined for anomalies, including grid strap damage.

The visual inspections revealed no anomalies and no indications of grid strap damage. The assemblies scheduled for discharge were visually scanned by inspection personnel from the edge of the spent fuel pool. All fuel assemblies appeared to be in good condition.

5.2 CPSES UNIT 2 CPSES Unit 2 did not enter a refueling outage in 1995 and therefore irradiated fuel examinations were not performed for the unit in calendar year 1995.

6.0 OUTAGE RELATED SINGLE RADI0 ACTIVITY RELEASE OR RADIATION EXPOSURE TO AN INDIVIDUAL THAT ACCOUNTS FOR MORE THAN 10 PERCENT OF ALLOWABLE ANNUAL VALUES During 1995. Ci'SES Units 1 and 2 did not experience any single release of radioactivity or single radiation exposure event to an individual greater than 10% of an allowable dose limit during an outage or a forced reduction in power of over 20% of designed power level.

Attachment to TXX-96018 .

Page 6 cf 23 FIGURE 1.1-1 -

COMANCHE PEAK STEAM ELECTRIC STATION - UNIT 1 GENERATION PROFILE AVERAGE DAILY UNIT POWER LEVEL 1,200 l I i -

~ =.

7 7 --

1,000 --

f 800 --

n 600 --

I i

400 -

1 200 0 --

JAN FEB MAR APR MAY JUN JULY AUG SEP OCT NOV DEC

Attachment to TXX-96018 Page 7 of 23 ,

TABLE 1.1-1 (PAGE 1 0F 2)

COMANCHE PEAK STEAM ELECTRIC STATION - UNIT 1 -

MONTHLY ELECTRIC POWER GENERATION DATA (1995)

January February March April MAY luDe Hours RX was Critical 744 672 76.0 354 720 603 RX Reserve Shutdown Hours 0 0 0.0 0.0 0.0 117 Hours Generator On-Line 744 672 75 278 717 5%

Unit Reserve Shutdown Hours 0.0 0.0 0.0 0.0 0.0 0.0 Gross Thermal Energy Generated (MWH) 2,531.633 2.292,703 215,769 697,466 2.399.707 1.934.088 Gross Electric Energy Generated (MWH) 850,444 770,311 72.661 224,340 804.061 643,121 Net Electric Energy Generated (MWH) 817,252 740,402 65.763 201,915 769,346 609.788 RX Service Factor (*) 100.0 100.0 10.2 49.3  %.8 83.7 RX Availability Factor (*) 100.0 100.0 10.2 49.3  %.8 100.0 Unit Service Factor (%) 100.0 100.0 10.0 38.6  %.4 82.8 Unit Availability Factor (*) 100.0 100.0 10.0 38.6  %.4 82.8 Unit Capacity Factor (*,using MDC net) 95.5  %.8 7.7 24.4 89.9 73.6 Unit Capacity Factor (*,using DER net) 95.5 95.8 7.7 24.4 89.9 73.6 Unit Forced Outage Rate (*) 0.0 0.0 0.0 10.7 3.6 17.2 Hours in Month 744 672 744 719 744 720 Net MDC (MWe) Estimated 1150.0 1150.0 1150.0 1150.0 1150.0 1150.0

Attachment to TXX-%018 Page 8 cf 23 ,

TABLE 1.1-1 (PAGE 2 0F 2) _

COMANCHE PEAK STEAM ELECTRIC STATION - UNIT 1 MONTHLY ELECTRIC POWER GENERATION DATA (1995)

July August Seotember October November December Hours RX was Critical 744 744 720 745 673 744 RX Reserve Shutdown Hours 0.0 0.0 0.0 0.0 47.0 0.0 Hours Generator On-Line 744 744 720 745 665 744 Unit Reserve Shutdown Hours 0.0 0.0 0.0 0.0 0.0 0.0 Gross Thermal Energy Generated (MWH) 2,529,907 2.415,617 2.451,485 2.494.591 2.115,398 2,411,782 Gross Electric Energy Generated (MWH) 837,295 793,438 813,170 838,956 710.103 811,676 Net Electric Energy Generated (MWH) 802.009 758,224 779,394 804,492 677,112 778,049 RX Service Factor (%) 100.0 100.0 100.0 100.0 93.5 100.0 RX Availability Factor (%) 100.0 100.0 100.0 100.0 100.0 100.0 Unit Service Factor (*) 100.0 100.0 100.0 100.0 92.4 100.0 Unit Availability Factor (%) 100.0 100.0 100.0 100.0 92.4 100.0 Unit Capacity Factor (*,using M)C net) 93.7 88.6 94.1 93.9 81.8 90.9 Unit Capacity Factor (*.using DER net) 93.7 88.6 94.1 93.9 81.8 90.9 Unit Forced Outage Rate (%) 0.0 0.0 0.0 0.0 7.6 0.0 Hours in Month 744 744 720 745 720 744 Net MDC (Mwe) Estimated 1150.0 1150.0 1150.0 1150.0 1150.0 1150.0

l fttachment to TXX %018 Page 9 of 23 i

l TABLE 1.1 2 COMANCHE PEAK STEAM ELECTRIC STATION UNIT 1  ;

i ANNUAL ELECTRIC POWER GENERATION DATA (1995) l I YEAR CUMULATIVE l Hours RX was Critical 7,539 38,752  !

RX Reserve Shutdown Hours 164 2,604 I l Hours Generator On Line 7.443 38,189 Unit Reserve Shutdown Hours 0.0 0.0 ,

Gross Thermal Energy Generated (MWH) 24.490.147 123,425,253 l I Gross Electric Energy Generated (MWH) 8,169,576 41,066,203 Net Electric Energy Generated (MWH) 7,803,746 39,167,193

  • RX Service Factor (*) 86.1 82.1 RX Availability Factor (*) 87.9 87.6 Unit Service Factor (*) 85.0 80.9 Unit Availability Factor (*) 85.0 80,9 Unit Capacity Factor (*,using MDC net) 77.5 72.2 Unit Capacity Factor (*,using DER net) 77.5 72.2 i Unit Forced Outage Rate (*) 3.1 4.5 Hours in Reporting Period 8,760 47,201 i

I 1

4

Attachment to TXX-%018 ,

Page 10 cf 23 FIGURE 1.2-1 .

COMANCHE PEAK STEAM ELECTRIC STATION - UNIT 2 GENERATION PROFILE ~

AVERAGE DAILY UNIT POWER LEVEL 1,200 -

) '

IP

~

l 1,000 -

i 800 --

e g 600 -

400 -

200 0 -

JAN FEB MAR APR MAY JUN JULY AUG SEP OCT NOV DEC

Attachment to TXX-96018 Page 11 of 23 .

TABLE 1.2-1 (PAGE 1 0F 2)

COMANCHE PEAK STEAM ELECTRIC STATION - UNIT 2 MONTHLY ELECTRIC POWER GENERATION DATA (1995)

January February March April May June Hours RX was Critical 744 672 744 719 486 720 RX Reserve Shutdown Hours 0.0 0.0 0.0 0.0 0.0 0.0 Hours Generator On-Line 744 672 744 691 475 720 Unit Reserve Shutdown Hours 0.0 0.0 0.0 0.0 0.0 0.0 Gross Thermal Energy Generated (MWH) 2.527,414 2.280,718 2.4 % ,290 2,291,023 1,629.662 2,414,758 Gross Electric Energy Generated (MWH) 864,314 779,380 850,218 775,489 524,309 815.433 Net Electric Energy Generated (MWH) 832,504 750,385 815,623 742,238 4 % ,799 783,133 RX Service Factor (%) 100.0 100.0 100.0 100.0 65.3 100.0 RX Availability Factor (%) 100.0 100.0 100.0 100.0 65.3 100.0 Unit Service Factor (%) 100.0 100.0 100.0  %.1 63.8 100.0 Unit Availability Factor (*) 100.0 100.0 100.0  %.1 63.8 100.0 Unit Capacity Factor (%,using EC net) 97.3 97.1 95.3 89.8 57.9 94.6 Unit Capacity Factor (*,using DER net) 97.3 97.1 95.3 89.8 57.9 94.6 Unit Forced Outage Rate (*) 0.0 0.0 0.0 3.9 5.3 0.0 Hours in Month 744 672 744 719 744 720 Net WC (MWe) Estimated 1150.0 1150.0 1150.0 1150.0 1150.0 1150.0

Attachment t@ TXX %018 Page 12 of 23 .

TABLE 1.2-1 (PAGE 2 0F 2)

COMANCHE PEAK STEAM ELECTRIC STATION - UNIT 2 ,

MONTHLY ELECTRIC POWER GENERATION DATA (1995)

July Auaust September October November December Hours RX was Critical 744 744 720 745 720 669 RX Reserve Shutdown Hours 0.0 0.0 0.0 0.0 0.0 75.0 Hours Generator On-Line 744 744 720 745 720 663 Unit Reserve Shutdown Hours 0.0 0.0 0.0 0.0 0.0 0.0 Gross Thermal Energy Generated (MWH) 2,537,400 2,533,570 2,451,221 2,537,868 2,447,148 2,115.914 Gross Electric Energy Generated (MWH) 850,624 847,873 824,472 864,071 -835,182 717,201 Net Electric Energy Generated (MWH) 817,024 814.478 792,462 830,804 803.550 685.402 RX Service Factor (*) 100.0 100.0 100.0 100.0 100.0 89.9 RX Availability Factor (*) 100.0 100.0 100.0 100.0 100.0 100.0 Unit Service Factor (*) 100.0 100.0 100.0 100.0 100.0 89.1 Unit Availability Factor (%) 100.0 100.0 100.0 100.0 100.0 89.1 Unit Capacity Factor (%,using E C net) 95.5 95.2 95.7 97.0 97.0 80.1 Unit Capacity Factor (%,using DER net) 95.5 95.2 95.7 97.0 97.0 80.1 Unit Forced Outage Rate (%) 0.0 0.0 0.0 0.0 0.0 10.9 Hours in Month 744 744 720 745 720 744 Net E C (Mwe) Estimated 1150.0 1150.0 1150.0 1150.0 1150.0 1150.0

,Attacitunt to TXX %018  !

Page 13 of 23 TABLE 1.2 2 COMANCHE PEAK STEAM ELECTRIC STATION - UNIT 2 ANNUAL ELECTRIC POWER GENERATION DATA (1995) j YfR CUMULATIVE l

Hours RX was Critical 8.427 17,544  ;

I RX Reserve Shutdown Hours 75 2,229 -

Hours Generator On Line 8,382 17,322 Unit Reserve Shutdown Hours 0.0 0.0 l;

Gross Thermal Energy Generated (MWH) 28,262,985 55,562,911  ;

Gross Electric Energy Generated (ElH) 9.548,566 18,704,621'-

Net Electric Energy Generated (MWH) 9,163,402 17,858,358 j RX Service Factor (*)  %.2 83.0 l RX Availability Factor (*) 97.0 93.6 Unit Service Factor (%) 95.7 82.0  !

Unit Availability Factor (*) 95.7 82.0 Unit Capacity Factor (*,using POC net) 91.0 73.5 .

Unit Capacity Factor (*,using DER net) 91.0 73.5 Unit Forced Outage Rate (%) 1.6 7.3 ]

l Hours in Reporting Period 8,760 21,136 j

Attachment to TXX-96018 Page 14 of 23 .

TABLE 2.1 (PAGE 1 0F 6)

COMANCHE PEAK STEAM ELECTRIC STATION - UNIT 1 -

UNIT OPERATING EXPERIENCE INCLUDING SHUTDOWNS AND POWER REDUCTIONS ETHOD OF TYPE SHUTTING DOWN F: FORCED DURATION

  • THE REACTOR OR M} DAIE S: SCHEDULED (HOURS) REASON REDUCING POER CORRECTIVE ACTIONS / COP 9ENTS 1 950303 5 669.5 C 1 Commenced power reduction for fourth refueling outage (IRF04) at 0800 (CST).

Tripped the turbine generator and the unit removed from the grid at 0230 on March 4.1995. Core off-load completed at 0310 on March 14. 1995.

IA 950401 S 408.0 C 1 Fourth refueling outage continued.

Following the refueling outage, reactor entered MODE 1 at 2308 on April

17. 1995 and the unit synchronized to the grid at 0107 on April 18. 1995.

2 950418 F 33.2 A 1 Unit taken off line and entered MODE 2 at 0502, since feed flow could not be established due to a stuck closed Feedwater Bypass Isolation Valve 1FW-0207: On April 19. 1995 at 1309.

repaired the valve and unit entered MODE 1. Unit synchronized to the grid at 1415.

l Attachment to TXX-96018  :

Page 15 of 23 .

.. i TABLE 2.1 (FAGE 2 0F 6) .

COMANCHF DEAK STEAM ELEC1RIC STATION - UNIT 1 l UNIT OPERATING EXPERIENCE INCLtX)ING SHUTD0letS AfE) POER REDUCTIONS -

ETH00 0F  :

TYPE SHUTTING DOWN F: FORCED DURATION

  • THE REACTOR OR I E MIE 5: SCHEDULED (HOLRS) REASON REDUCING POE R CGtRECTIVE ACTIONS /dswamT5 3 950505 F 26.9 H 3 At approximately 2008. reactor tripped [

due to a lightning strike which caused a' surge in the rod control power i supplies; unit entered MODE 3. On May +

16. 1995. unit returned to MODE 1 and '!

synchronized to the grid at 2300. Unit  ;

restored to 100* power at approximately 1026 on May 8. 1995. ,

(

Reference:

LER 445/95-002-00) 4 %0611 F 123.9 A 2 At approximately 1202, initiated manual i reactor trip due to a loss of both main j feed pumps and both condensate pumps. i Unit entered MODE 3. Investigation I revealed that failed non-safety invertor IV1C2 caused the problem. Also during this event, the Turbine Driven  !

Auxiliary Feedwater (TDAFW) pump  ;

tripped on overspeed. Coupleted l 1

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-._]

Attachment to TXX-%018 Page 16 cf 23 .

TABLE 2.1 (PAGE 3 0F 6)

COMANCHE PEAK STEAM ELECTRIC STATION - UNIT 1 UNIT OPERATING EXPERIENCE INCLUDING SHUTDOWNS AM) POWER REDUCTIONS -

METHOD OF TYPE SHUTTING DOWN F: FORCED DURATION

  • THE REACTOR OR gl DAIE S: SCHEDULED (HOURS) REASON REDUCING POWER CORRECTIVE ACTIONS /CO M NTS repairs to IVIC2 and TDAFW pump and unit entered MODE 1 at 1536 and unit synchronized to the grid at 1558

(

Reference:

LER 445/95-003-00).

Reactor power held at 50% due to water intrusion problems in Main Feedwater pump lube oil storage tank. Unit returned to 100t power on June 19. 1995 at approximately 1440 after correcting lube oil storage tank problem.

5 950818 F 0.0 A 4 At 1611. unit ramped down to 56% power to troubleshoot MFWP-1B speed oscillations. On August 20. at 1140.

unit restored to 1002 power after replacing the power supplies and controller cards to correct the speed oscillation problem.

6 950825 F 0.0 A 4 At 2333. unit power reduced to 55% to perform more troubleshooting on MFWP-1B due to continuing speed oscillations.

Replaced additional cards and completed repairs on MFWP-18. Unit regained power to 1002 level approximately at 0618 on August 28, 1995.

Attachment to TXX-%018 Page 17 cf 23 .

TABLE 2.1 (PAGE 4 0F 6)

COMANCHE PEAK STEAM ELECTRIC STATION - UNIT 1 UNIT OPERATING EXPERIENCE INCLUDING SHUTDOWNS AND POWER REDUCTIONS METHOD OF TYPE SHUTTING DOWN F: FORCED DURATION

  • THE REACTOR OR HQ Q&IE 5: SCHEDULED (HOURS) REASON REDUCING POWER CORRECTIVE ACTIONS /C0l#ENTS 7 951009 F 0.0 A 4 At 2243 initiated power reduction to 70% level to correct Heater Drain Pump shutdown from oil cooler leak. On October 11, 1995 unit returned to 100%

power at 0720 after replacing the Heater Drain Pump oil cooler.

8 951024 F 0.0 A 4 At 0044. Main Feedwater Pump 1B Recirculation Valve failed open due to a blown control power fuse. The Main Feedwater Pump 1B tripped on low suction pressure. Turbine runback to 700 Mwe to unit power level of approximately 60%. At 0444. the Control Circuit Card fuse replaced and the Main Feedwater Pump restored back in service; subsequently replaced the card for further trouble shooting and unit returned to 100t power at 1550. ,

9 951119 F 55.0 A 3 Main Feedwater Pump 1A Recirculation Valve failed open at 1735 due to failure of 7300 card resulting from blown fuse on the tracking driver card.

During the transient. Main Feedwater Pump 1B tripped on low suction pressure. After manual isolation of the failed Recirculation Valve the

Attachment to TXX-%018 Page 18 of 23 .

TABLE 2.1 (PAGE 5 0F 6)

COMANCHE PEAK STEAM ELECTRIC STATION - UNIT 1 UNIT OPERATING EXPERIENCE INCLUDING SHUTDOWNS AND POWER REDUCTIONS METHOD OF TYPE SHUTTING DOWN F: FORCED DURATION

  • THE REACTOR OR NQ D8IE S. SCHEDULED (HOURS) REASON REDUCING POWER CORRECTIVE ACTIONS /COMENTS Steam Generator 1-02 level increased to High-High level causing turbine and reactor trip. After troubleshooting and replacement of the tracking driver card, restored the Main Feedwater Pump 1A Recirculation Valve and unit synchronized to the grid at 1610 approximately, on November 23. 1995.

(

Reference:

LER 445/95-007-00) 10 %1125 F 0.0 H 4 At 2030 initiated power reduction to 30% level to restore Steam Generator chemistry due to resin intrusion from Steam Generator Blowdown System.

Verified blowdown integrity and maximized blowdown flow for Steam Generator cleanup. Following cleanup of all Steam Generators, unit restored to 100* power at 0607 on November 28.

1995.

Attachment to TXX-%018 Page 19 of 23 .

TABLE 2.1 (PAGE 6 0F 6)

COMANCHE PEAK STEAM ELECTRIC STATION - UNIT 1 UNIT OPERATING EXPERIENCE INCLUDING SHUTDOWNS AND POWER REDUCTIONS ETHOD OF TYPE SHUTTING DOWN F: FORCED DURATION

  • THE REACTOR OR E MIE S: SCHEDULED (HOURS) REASON REDUCING POWER CORRECTIVE ACTIONS / COP 9ENTS 11 951201 F A 4 At 1300, unit power level was reduced to approximately 531 to troubleshoot Main Feedwater Pump 1A vibrations. On December 4,1995 at 1930, initiated power ascension following replacement '

of the Pump 1A bearings and unit returned to 1001 power at 1121 on i December 5, 1995.

1) REASON 2) METHOD A: EQUIPMENT FAILURE (EXPLAIN) E: OPERATOR TRAINING AND LICENSE EXAMINATION 1: MANUAL B: MAINT OR TEST F: ADMINISTRATIVE 2: MANUAL SCRAM C: REFUELING G: OPERATIONAL ERROR (EXPLAIN) 3: AUTOMATIC SCRAM D: REGULATORY RESTRICTION H: OTHER (EXPLAIN) 4: OTHER (EXPLAIN)
  • INDICATES SHUTDOWN HOURS

Attachment to TXX-%018 Page 20 of 23 -

TABLE 2.2 (PAGE 1 0F 3)

COMANCHE PEAK STEAM ELECTRIC STATION - UNIT 2 UNIT OPERATING EXPERIENCE INCLUDING SHUTDOWNS AND POWER REDUCTIONS ETHOD OF TYPE SHUTTING DOWN F: FORCED DURATION

  • THE REACTOR OR 10 DE S. SCHEDULED (HOURS) REASON REDUCING POWER COMRECTiVE ACTIONS /COMENTS 1 950315 F 0.0 A 4 At 1515 a fault on switchyard breaker caused breaker to open creating electrical transient to Condensate Polishing System resulting in condensate /feedwater transient. At this time, heater drain pump was intentionally shutdown to cause a generator runback in order to stabilize the transient. Power reduced approximately to 707 to repair minor damage. Repair included replacement of bearing on the heater drain pump. Unit restored to full power at approximately 1645 on Narch 17. 1995.

2 950410 F 28.4 A 1 Latching mechanism on the turbine overspeed device failed. At 0504, the plant was taken off line and maintained in MODE 2 for repairs. Subsequently replaced the overspeed trip device release-mechanism connecting rods and unit returned to MODE 1 and synchronized to the grid. Unit restored full power at 1500 on April 12. 1995.

3 950505 F 26.9 H 3 At approximately 2009. reactor tripped due to a lightning strike which caused a surge in the rod control power supplies: unit entered MODE 3.

(

Reference:

LER 445/95-002-00)

Attachment to TXX-%018 Page 21 of 23 .

TABLE 2.2 (PAGE 2 0F 3)

COMANCHE PEAK STEAM ELECTRIC STATION - UNIT 2 UNIT OPERATING EXPERIENCE INCLUDING SHUTDOWNS A10 POWER REDUCTIONS METHOD OF TYPE SHUTTING DOWN F: FORCED DURATION

  • THE REACTOR OR M1 D8IE 5: SCHEDULED (HOURS) REASON REDUCING POER CORRECTIVE ACTIONS /C0f9ENTS 4 950506 S 242.1 A 4 While the reactor in MODE 3. unit entered a scheduled maintenance outage to repair leaks on charging line check valves. Unit entered MODE 5 on May 9, 19?5. On May 14, 1995 at 1249. unit entered MODE 4 after completing the check valve repairs. Subsequently unit entered MODE I and synchronized to the grid. Unit returned to 100* power at approximately 1803 on May 18, 1995.

5 950627 F 0.0 A 4 Main feedwater pump 2B speed sensor probe failed. At 2230. unit power level was reduced to approximately 57% to allow investigation of the speed sensor failure. Replaced the sensor and initiated power ramp up.

Unit returned to 100% power at G219 on June 29, 1995.

6 951205 F 81.0 A 3 At 1311. the reactor tripped on a Steam Generator 2-03 Lo-Lo level due to Main Feedwater Pump 2A speed oscillations. On December 8, 1995 following completion of repair on the Pump 2A speed controller, unit entered MODE 2. Following MODE 1 entry, unit was synchronized to the grid at 2211.

(

Reference:

LER 446/95-004 00)

Attachment ta TXX-96018 Pa9e 22 of 23 .

TABLE 2.2 (PAGE 3 0F 3)

COMANCHE PEAK STEAM ELECTRIC STATION - UNIT 2 UNIT OPERATING EXPERIENCE INCLUDING SHUTDOWNS AIO POWER REDUCTIONS METHOD OF TYPE SHUTTING DOWN F: FORCED DURATION

  • THE REACTOR OR HQ D8IE S. SCHEDULED (HOURS) REASON REDUCING POER CORRECliVE ACTIONS /C0f9ENTS 7 951209 F 0.0 A 4 Unit power level was maintained at 47% power to complete repairs on the Main Feedwater Pump 28 speed controller and on Dece der 12, 1995, unit resumed 1001 power at approximately 1800.
1) REASON 2) METHOD A: EQUIPMENT FAILURE (EXPLAIN) E: OPERATOR TRAINING AND LICENSE EXAMINATION 1: MANUAL B: MAINT OR TEST F: ADNINISTRATIVE 2: MANUAL SCRAM C: REFUELING G: OPERATIONAL ERROR (EXPLAIN) 3: AUTOMATIC SCRAM D: REGULATORY RESTRICTION H: OTHER (EXPLAIN) 4: OTHER (EXPLAIN)
  • INDICATES SHUTDOWN HOURS ,

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', Attachment to TXX %018 Page 23 of 23 l TABLE 3.0 l COMANCHE PEAK STEAM ELECTRIC STATION UNITS 1 AND 2 PERSONNEL EXPOSURE AND MONITORING REPORT f Personnel U100 nRem) Total Person . Ree

Work & Job Function Station Utility Contract Station Utility Contract Reactor Operations & Surveillance Maintenance & Construction 0 0 8 .023 .000 2.077 Operations 13 0 2 5.922 .073 1.038 Health Physics & Lab 11 0 29 2.700 .071 7.488 Supervisory & Office Staff 0 0 0 .031 .000 .153 Engineering Staff 2 0 1 1.088 .000 .321 Routine Plant Maintenance Maintenance & Construction 23 0 172 6.790 .000 54.220 .

Operations 3 0 6 1.243 .000 1.553 ,

Health Physics & Lab 2 0 5 .801 .000 2,n19 '

Supervisory & Office Staff 0 0 0 .001 .000 .001 Engineering Staff 1 0 6 .949 .045 1.816 i l Inservice Inspection Maintenance & Construction 1 0 125 .462 .000 45.824 Operations 0 0 7 .146 .000 2.679 Health Physics & Lab 4 0 8 1.031 .000 2.543 Supervisory & office Staff 0 0 0 .000 .000 .000 Engineering Staff 0 0 3 .251 .000 1.514 l i

i Special Plant Maintenance j l Maintenance & Construction 2 0 15 .698 .000 7.578 >

l Operations 0 0 0 .034 .000 .171 Health Physics & Lab .000 .043

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0 0 0 .001  :

Supervisory & Office Staff 0 0 0 .000 .000 .000 i

. Engineering Staff 0 0 0 .000 .000 .177 i l  !

! Weste Processing j Maintenance & Construction 0 0 0 .013 .000 .327 j Operations 1 0 1 .676 .000 .774 l Health Physics & Lab 4 0 1 .773 .095 .746 l Supervisory & Office Staff 0 0 0 .000 .000 .000 l Engineering Staff 0 0 0 .071 .000 .000 j Refueling Maintenance & Construction 1 0 42 .349 .000 18.388 Operations 4 0 0 .720 .000 .005 Health Physics & Lab 0 0 6 .238 .000 2.282 Supervisory & Officit Sta.ff 0 0 0 .000 .000 .000  !

Engineering Staff 0 0 1 .148 .000 .178 Totals Maintenance & Construction 29 0 323 8.336 .000 128.413 Operations 24 0 15 8.742 .073 6.219 Health Physics & Lab 19 1 57 5.544 .166 15.121 Supervisory & Office Staff 0 0 0 .032 .000 .154 Engineering Staff 3 0 12 2.506 .045 4.006 Grand Totals 75 1 407 25.159 .284 153.913 i

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