ML20063L108

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Monthly Operating Repts for Jan 1994 for Calvert Cliffs Nuclear Power Plant
ML20063L108
Person / Time
Site: Calvert Cliffs  Constellation icon.png
Issue date: 01/31/1994
From: Piazza F
BALTIMORE GAS & ELECTRIC CO.
To:
Shared Package
ML20063L107 List:
References
NUDOCS 9403040004
Download: ML20063L108 (10)
v • d • e


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UNIT 1 OPERATING DATA REPORT oo*********************************************************r****************

Docket No. 50-317 February 15,.1994 ~

Prepared by Frank Piazza Telephone: (410) 2 60-3 821 l OPERATING STATUS

1. UNIT NAME Calvert Cliffs Unit 1 ,.
2. REPORTING PERIOD JANUARY 1994
3. LICENSED THERMAL POWER (MWT) 2700
4. NAMEPLATE RATING (GROSS MWe) 918
5. DESIGN ELECTRICAL RATING (NET MWe) 845
6. MAXIMUM DEPENDABLE CAP'Y (GROSS MWe) 860 ,
7. MAXIMUM DEPENDABLE CAP'Y (NET MWe) 830
8. CHANGE IN CAPACITY RATINGS NONE
9. POWER LEVEL TO WHICH RESTRICTED N/A
10. REASONS FOR RESTRICTIONS N/A Cumulative "

This month Year-to-Date to Date l

11. HOURS IN REPORTING PERIOD 744 744 164,245 ,
12. NUMBER OF HOURS REACTOR WAS CRITICAL 561.4 561.4 117,530.4 ,
13. REACTOR RESERVE SHUTDOWN HOURS 0.0 0.0 '3,019.4
14. HOURS GENERATOR ON LINE 561.4 561.4 115,139.8
15. UNIT RESERVE SHUTDOWN HOURS 0.0 0.0 0.0
16. GROSS THERMAL ENERGY GENERATED (MWH) 1,511,925 1,511,925 291,826,744 ,
17. GROSS ELECTRICAL ENERGY GEN'TED(MWH) 507,645 507,645 96,981,191
18. NET ELECTRICAL ENERGY GENERATED (MWH) 483,493 483,493 92,287,775 l
19. UNIT SERVICE FACTOR 75.5 75.5 70.1-  ;
20. UNIT AVAILABILITY FACTOR 75.5 75.5 70.1 j

'21. UNIT CAPACITY FACTOR (USING MDC NET) 78.3 78.3 68.1L '

22. UNIT CAPACITY FACTOR (USING DER NET) 76.9 76.9 66.5-  ;
23. UNIT FORCED OUTAGE RATE 24.5 24.5 '8.8 '
24. SHUTDOWNS SCHEDULED OVER THE NEXT SIX MONTHS (TYPE, DATE AND DURATION):

Refueling, February 8, 1994, 90 Days .l

25. IF SHUTDOWN AT END OF REPORT PERIOD, .

ESTIMATED DATE OF START-UP:  !

February 2, 1994- ,

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9403040004 940215 PDR E

ADOCK 05000317  :

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UNIT SIIUTDOWNS AND POWER REDUCllONS

  • DOCKET NO. 317 ~

UNIT NAME Cahrrt Cliffs-U1 DATE February 15.1994 i COMPLETED BY Frank Pia 77a "

TELEPHONE (4101 260-3821 REPORT MONTIl Jnnuary 1994 MEUIOD OF

. SIlUTUNG LICENSEE CAUSE & CORRECnVE 3

DURNRON DOWN EVENT SYS1 tim COMPONENT ACDONTO NO. DATE TYPEI (IIOURS) REASON 2 REACIUR3 REPORT # CODE 4 CODES PREVENT RECURRENCE INVT 94-01 940124 F 182.6 A 3 317/94-01 ED The Unit automatically shutdown on 1/24/94 at 0926 due to a loss of the 120 Vac Vital Panel 1YO2. The loss of the panel was due to the failure of the voltage regulator card in the 12 Vital Inverter '

which resulted in the loss of the 120 Vac Vital Panel and the Unit trip.

Circuit cards were replaced and load tested both

, statically and dynamically. Due to the ongoing trouble shooting to determine the exact cause of the failure, an Unusual Event #3765 was declared and the Unit was cooled down and entered into Mode 5 at 2105 on 1/26N4.

A Significant incident Finding Team was established to investigate the cause and to determine long term corrective resolutions.

1 F: Forced 2 Reason: 3 Method: 4 IEEE Standard 805-1984 S: Scheduled A - Equipment Failure 1 - Manual -

B - Maintenance or Test 2 - Manual Scram.  !

-; C- Refueling 3 - Automatic Scram. 5 IEEE Standard 803A-1983 D - Regulatory Restriction _

4 - Continued >

E - Operator Training & License Examination 5 - Reduced Load F- Administrative 9 - Other G - Operational Error H - Other

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-AVERAGE DAILY UNIT POWER LEVEL oc**********************************************************************  ;

-Docket No. 50-317 Calvert Cliffs Unit No. 1 February-15, 1994 Prepared by Frank Piazza ',

Telephone: (410) 260-3821 JANUARY 1994 Average Daily Power Level Average Daily Power Level Day (MWe-Net) Day (MWe-Net)

  • 1 867 17 863 2 867 18 866 3 868 19 867 4 868 20 870 i 5 868 21 870  ;

6 883 22 870 i 7 886 23 870 8 868 24 323 9 867 25 0 10 854 26 0  !

11 853 '27 0 i

12 866 28 0-13 869 29 0 14 872 30 0 i l

15 871 31 0

,t 16 868 F 1

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DOCKET NO. 50-317 i i

CALVERT CLIFFS - UNIT 1 February 15,1994 l l

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SUMMARY

OF OPERATING EXPERIENCE January 1994 He unit began the month at 100% reactor power (870 MWe).

  • On 1/24f>4 at 0926, the unit tripped due to a loss of the 120 Vac Vital Panel 1Y02. The loss of the Panel was due to the failure of the voltage regulator in the 12 Vital Inverter. A Significant Incident Finding Team was immediately formed to investigate the cause of the inverter failure and to -

determine future corrective actions. Because the root cause for the inverter failure was not  ;

determined in sufficient time, the unit commenced cooldown at 1050 on 1/26/94 as required by  ;

Technical Specifications and entered Mode 5 at 2105. The Inverter Voltage Regulator Board was - .

subsequently found to be faulty and was replaced.

The Unit ended the month shutdown in Mode 3 after starting a plant heat-up.

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I January 6. 1994 ,

. NFM 94-004- l Page 2 of 4  !

1 REFUELING INFORMATION REQUEST l 1

1. Name of facility: Calvert Cliffs Nuclear Power.. Plant, Unit No.1.
2. Scheduled date for next refueling shutdown: February 8, 1994.
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3. Scheduled date for restart following refueling: May 9, 1994.
4. Will refueling or resumption of operation thereafter require a Technical Specification change or other-license amendment?

Operation after refueling will require either " Core Operating Limits 1 Report" or will require a change to Technical Specification 3/4.2.2,. i

" Linear Heat Rate".  !

5. Scheduled date(s) for submitting proposed licensing action and supporting informatiori.

Submitted September 1993 for Core Operating Limits Report.

. 6. Important licensing considerations associated with the refueling, None identified at this time. .;

7, The number of fuel assemblies (a) in the core and (b) in the spent fuel '

storage pool.

(a) 217. (b) 1426. (Note 2) * - t Spent fuel pools are common to Units 1 and 2. {

8. (a) The present licensed spent fuel pool storage ca3acity, and (b) the ,

size of any increase in licensed storage capacity tlat has been  :

requested or is planned, in number of fuel assemblies.

(a) 4710. (NOTE 1) (b) 0.

i 9 The projected date of the last refueling that can be discharged to the .;

Spent Fuel Pool assuming the present licensed capacity and maintaining -

space for one full core off-load. .

March 2014 ,

  • Entry has changed since last report. -i NOTE 1: 4710 total licensed site storage capacity. ,

-(1830 pool + 2880 ISFSI) i NOTE 2: 72 Spent Fuel Assemblies in the ISFSI.  ;

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UNIT 2 OPERATING DATA REPORT i QQ**************************************************************************

l Docket No. 50-318 l February 15, 1994 Prepared by Frank Piazza Telephone : (410) 260-3821 OPERATING STATUS

1. UNIT NAME Calvert Cliffs Unit 2 -
2. REPORTING PERIOD JANUARY 1994
3. LICENSED THERMAL POWER (MWT) 2700 ,
4. NAMEPLATE RATING (GROSS MWe) 911
5. DESIGN ELECTRICAL RATING.(NET MWe) 845
6. MAXIMUM DEPENDABLE CAP'Y (GROSS MWe) 860
7. MAXIMUM DEPENDABLE CAP'Y (NET MWe) 830
8. CHANGE IN CAPACITY RATINGS NONE

{ 9. POWER LEVEL TO WHICH RESTRICTED N/A l_ 10. REASONS FOR RESTRICTIONS N/A Cumulative This month Year-to-Date to Date

11. HOURS IN REPORTING PERIOD '744 744 147,600
12. NUMBER OF HOURS REACTOR WAS CRITICAL 571.2 571.2 106,608.0-
13. REACTOR RESERVE SHUTDOWN HOURS 0.0 0.0 1,296.6
14. HOURS GENERATOR ON LINE 568.0 568.0 105,091.6
15. UNIT RESERVE SHUTDOWN HOURS 0.0 0.0 0.0
16. GROSS THERMAL ENERGY GENERATED (MWH) 1,509,766 1,509,766 268,375,309
17. GROSS ELECTRICAL ENERGY GEN'TED(MWH) 506,297 506,297- 88,662,166 ,

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18. NET ELECTRICAL ENERGY GENERATED (MWH) 483,609 483,609 84,726,743
19. UNIT SERVICE FACTOR 76.3 76.3 71.2
20. UNIT AVAILABILITY FACTOR 76.3 76.3 71.2
21. UNIT CAPACITY FACTOR (USING MDC NET) 78.3 78.3 69.6
22. UNIT CAPACITY FACTOR (USING DER NET) 76.9 76.9 67.9'
23. UNIT FORCED OUTAGE RATE 23.7 23.7 5.8
24. SHUTDOWNS SCHEDULED OVER THE NEXT SIX MONTHS (TYPE, DATE AND DURATION):

N/A

25. IF UNIT IS SHUTDOWN AT END OF REPORT PERIOD, ESTIMATED DATE OF START-UP:

N/A

UNIT SIIUTDOWNS AND POWER REDUCTIONS -

DOCKET NO. 50-318 UNITNAME Calwrt ClitTs-U2 -

DATE February 15.1004 i

COMPLETED BY Frank Piana TELEPHONE (410) 2NL3821 REPORTMONTil January 1994 METilOD OF SillTITING LICENSEE CAUSE & CORRECITVE DURATION DOWN EVENT SYSTEM COMPONENT ACITON TO No. DATE TYPEI (IIOURS) REASON 2 REACIOR3 REPORT # CODE 4 CODES PREVENT RECURRENCE 94-01 940112 F 176.0 A 3 3183 401 El RLY Unit automatically shutdown at 0552 on 1/12N4 when a protective relay for the 13KV Voltage Regulator which was being installed, but not yet operational, caused the supply breaker (# 252-2103) for the Senice Transformer (# U-4000-22) to open.

This resulted in the loss of the Senice Transformer and actuation of other safety features to trip the Unit.

A ground in the associated 125 VDC control circuit interacted with the 125 VDC ground detection system producing a signal which actuated the protective relay and tripped the Unit.

All leads for the new voltage regulator protective circuits for both Units were disconnected and the voltage regulator bypass switches were tagged in the shut position, removing the possibility of the circuitry tripping either Unit.

A Significant Incident Finding Team was established to investigate the event.

1 F: Forced 2 Reason: 3 hiethod: 4 IEEE Standard 805-1984 S: Scheduled A- Equipment Failure 1 - hianual

  • B - hiaintenance or Test 2 - AfanualScram.

C- Refueling 3 - Automatic Scram. 5 IEEE Standard 803A-1983 D - Regulatory Restriction 4 - Continued E - Operator Training & License Examination 5 - Reduced Load F- Administrative 9 - Other ,

G - Operational Error H - Other

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AVERAGE DAILY UNIT POWER LEVEL co**********************************************************************

Docket No. 50-318 Calvert Cliffs Unit No. 2' _

February 15, 1994 Prepared by Frank Piazza. __ ,

Telephone: (410) 260-3821 '

JANUARY 1994 .

                              • t Average Daily Power Level Average Daily Power--Level Day (MWe-Net) Day (MWe-Net) 1 871 17 0 -!

2 869 18 0 ,

3 870 19 168 4 871 20 856 5 871 21 863 6 853 22 865 7 853 23 868 8 776 24 867 9 871 25 864 10 885 26 866 11 886 27 866 12 196 28 869 13 0 29 869 14 0 30 869 15 0 31 869 16 0 d

- ,w-. . - . - r - or u -.e- e w - y

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. 1 DOCKET NO. 50-318 CALVERT CLIFFS - UNIT 2 February 15,1994

SUMMARY

OF OPERATING EXPERlENCE January 1994 1

The Unit began the month at 100% reactor power (875 MWe). De reactor power was reduced to approximately 82% (720 MWe) on 1/8S4 at 0200 for planned maintenance, Main Turbine valve testing, and water box cleaning. Power was restored to 100% (870 MWe) at 2330 on 1/8S4.

On 1/12N4 at 0552. a protective relay for a 13 KV Voltage Regulator that was being installed, but not  !

yet in operation, actuated on a spurious signal and caused a reactor trip. The trip was a result of the opening of the feeder breaker (# 252-2103) for the 13 KV/4 KV step down transformer (U-4000-22). -

He reactor tripped immediately when protective safety equipment actuated. The spurious relay 1 actuation was caused by an intermittent ground on the DC control power circuit which generated a signal to a new solid state seal-in-relay. This scal-in-relay was overly sensitive because its associated sensor was not yet connected. As part of the immediate corrective actions, the voltage regulator 1 protective circuits for both Units were disconnected and the voltage regulator bypass switches were l tagged in the shut position. This action climinated the possibility of the circuit tripping either Unit umil resolution of the probicm was completed. A Significant Incident Finding Team was also established to investigate the event for the long term corrective resolutions. )

While in a shutdown condition, a leak was detected in the leak off detection line which monitors reactor vessel head seal leak. The line was repaired while the Unit was shutdown.

The Unit was returned to power and paralleled to the grid on 1/1994 at 1350, remaining at 100%

power (865 MWe) for the remainder of the month.

January 6. 1994

, . *NFM 94-004 l Page 3 of 4 4

REFUELING INFORMATION REQUEST

1. Name of facility: Calvert Cliffs Nuclear Power Plant. Unit No. 2 ,
c. Scheduled date for next refueling shutdown: March 3, 1995.
3. Scheduled date for restart following refueling: May 17, 1995.
4. Will refueling or resumption of operation thereafter require a Technical Specification change or other license amendment?

Unknown.

S. Scheduled date(s) for submitting proposed licensing action and supporting information. ,

Unknown.

6. Important licensing considerations associated with the refueling.

None identified at this time.

7. The number of fuel assemblies (a) in the core and (b) in the spent fuel storage pool.

(a) 217. (b) 1426. (Note 2) * -

Spent fuel pools are common to Units 1 and 2.

8. (a) The present licensed spent fuel pool storage ca)acity. and (b) the size of any increase in licensed storage capacity tlat has been requested or is planned, in number of fuel assemblies. J (a) 4710 (NOTE 1) (b) 0.

a

9. The projected date of the last refueling that can be discharged to the  ;

-Spent Fuel Pool assuming the present licensed capacity and maintaining space for one full core off-load.

March 2016.

  • Entry has changed since last report.

NOTE 1: 4710 total licensed site storage capacity. i (1830 pool + 2880 ISFSI)

NOTE 2: 72 Spent Fuel Assemblies in the ISFSI.

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