Text

Monthly Operating Rept for Sep 1978
	ML20147C865
Person / Time
Site:	Davis Besse
Issue date:	10/06/1978
From:	; TOLEDO EDISON CO.
To:	;
Shared Package
ML20147C863	List: ML20147C858; ML20147C865;
References
	NUDOCS 7810130144
	Download: ML20147C865 (5)
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AVERAGE D AILY UNIT POWER LEVEL I

50-346 DOCKET NO.

Davis-Besse Unit 1 l 3,g7 October 6, 1978 DATE E. Caba COMPLETED BY 419-259-5000, Ext.

TELEPHONE 251 September, 1978 MONTH DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe Net)

(MWe Net) 881 663

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880 665 gg 2

663 881 3

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881 667 4

20 665 884 3

21 889 659 22 6

654 889 7

23 653 885 8

24 884 620 25 9

258 885 10 26 458

.885 gi 27 720 40 12 28 799 0

13 29 801 0

14 30 816 3g 15 16 878 1

INSTRUCTIONS On this format list the average daily unit power leselin MWe Net for each day in the reporting month. Compute to the nearest whole megawatt.

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j OPERASNG DATA REPORT '

1 DOCKET NO. 50-346 q

DATE. October e,1978 j

COMPLETED BY E. Caba i

TELEPil0NE A10-M9-5000, Ext. !

251 l OPERATING STATUS i

Davis-Besse Unit 1 Notes

1. Unit Name:

2. Reporting Period:

September, 1978

3. Licensed Thennal Power (MWr):

925

4. Nameplate Rating (Gross Mbe):

906 S. Design Electrical Rating (Net MWe):

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6. Maximum Dependable Capacity (Gross MWe):

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7. Maximum Dependable Capacity (Net MWe):

8. If Changes Occur in Capacity Ratings (!! cms Number 3 Through 7) Since Last Report.Give Reasons:

9. Power Level To Which Restricted,if Any (Net MWe)i

. None

10. Reasons For Restrictions,if Any:

This Month Yr..to Date Cumulatise II. Hours In Reporting Period

_720 6551

' 9556 636.4 3553.6s 530./

'12. Number Of Hours Reactor Was Critical 13, Reactor Reserve Shutdown llours 19.1 38.9 422.6

14. Hours Generator On Line 631.3 3246.4 4713.2

15. Unit Reserve Shutdown flours 0

0 0

16. Gross Thermal Energy Generated (MWH) 1,535,662 6,174,797-7,838,829

17. Gross Electrical Energy Generated (MWH) 518.725,,

2,098,898 2,623,347

18. Net Electrical Energy Generated (MWH) 488.193 1.922,139 2,351,957

19. Unit Settice Factor 87.7%

49.6%

32.9%

20. Unit Availability Factor -

87.7%

49.6%

52.9%

to be detemined

21. Unit Capacity Factor (Using MDC Net)

22. Unit Capacity Factor (Using DER Net) 74.8%

32.4%

32.9%

23. Unit Forced Outage Rate 9 9%

25.7%

25.1%

24. Shutdowns Scheduled Over Next 6 Monihs (Type. Date, and Duration of Each t:

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October 2,1978

25. If Shut Down At End Of Report Period Estimated Date of Startup:

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26. Units In Test Status (Prior io Commercial Operation):

Forecast Achieved INITIAL CRITICALITY 8/12/77 INITIAL ELECTRICITY 8/28/77 11/21/77.*

COMM ERCIA L OPER ATION

Declared operational at 25%

12/19/77**

1/23/78***

- Declared operational at 40% (from 25%)

'7/31/7 ** *

'*** Declared operational at 75% (from 40%)

77

- - Declared operational at 100% (from 75%)

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50-346-DOCKET NO.

UNIT SHUTDOWNS AND POWER REDUCTIONS UNIT NAME Davis-Besse Unit.1 DATE. October 6,- 1978 COWLETED BY C. aim REPORT MONTil September, 1978-TELEPIIONE 419 ')S9--sonn Ext. 251 1

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).Eh Cause & Corrective :

.j-1 No.

Date

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Event gg 93 Action to yU-

- Prevent Recurrence mO s-gE s

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23 78 09 10 S

19.1 B

3 N/A N/A N/A The turbine-generator was tripped to-l perform the Reactor Turbine Trip Test er (TP 800.14).

The' reactor tripped because of reac-i 24 78 09 28-F

'69.6 A

.3 N/A IA' INSTRU

-- tor coolant-system (RCS) low pressure.

The RCS low pressure occurred when the steam generators were overfed dur-ing an attempt to stabilize -plant '

The transient parameters parameters.

were caused by the failure of the RCS j '.

flow transmitter for Loopf2 of the

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4 Method:~

Exhibit G-Instructions 1-Manual for Preparation of Data F: Forced Meason:

j S: Schedu!cd.

A Equipment Failure (Explain) 2-Manual Scram.

Entry Sheets for Licensee -

b-Maintenance of Test 3-Automatic Scram.

. Event Report (LER) File (NUREG-C-Refueling 4-Other (Explain)-

0161)

D Regulatory' Restriction E-Operator Training & License Examination 5

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" "~ ' ' F-Administrative Exhibit I-Same Source G-Operational Error (Explain) j-19/77)

II-Other (Explain) i

OPERATIONAL

SUMMARY

FOR SEPTEMBER 1978_

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9/1/78 - 9/8/78 Reactor power was maintained at 75 i i percent with the generator gross load at 705 i 10 MWe. ' During this time period,- data was acquired for physics testing and pre-parations were initiated to perform unit transient test-ing.

1 The Unit Load Transient Test (TP 800.23) was initiated at 9/9/78 0955 hours0.0111 days 0.265 hours 0.00158 weeks 3.633775e-4 months . At 2130 hours0.0247 days 0.592 hours 0.00352 weeks 8.10465e-4 months , reactor power was returned.co 75 percent and preparations were made to perform the Reac-tor Turbine Trip Test (TP 800.14).

The turbine-generator was tripped at 0931 hours0.0108 days 0.259 hours 0.00154 weeks 3.542455e-4 months as per 9/10/78 TP 800,14. The reactor then tripped at 0932 hours0.0108 days 0.259 hours 0.00154 weeks 3.54626e-4 months because of reactor coolant system low pressure. Reactor critica-lity was re-established at 2324 hours0.0269 days 0.646 hours 0.00384 weeks 8.84282e-4 months .

9/11/78 - 9/12/78 The turbine-generator was synchronized on line at 0437 hours0.00506 days 0.121 hours 7.225529e-4 weeks 1.662785e-4 months on September 11, 1978. Reactor power was then in-creased and attained 90 percent at 1750 hours0.0203 days 0.486 hours 0.00289 weeks 6.65875e-4 months on September 12, 1978. During this power increase, reactor power was maintained at 70 percent for eight hours and 75 percent for eighteen hours. The generator gross load at 90 percent reactor power was 835 1 10 MWe.

9/12/78 - 9/15/78 Reactor power was maintained at 90 percent from 1750 hours0.0203 days 0.486 hours 0.00289 weeks 6.65875e-4 months on September 12, 1978 to 1528 hours0.0177 days 0.424 hours 0.00253 weeks 5.81404e-4 months on September 15, 1978.

Reactor power was then increased and attained 97 percent at 1750 hours0.0203 days 0.486 hours 0.00289 weeks 6.65875e-4 months on September 15, 1978.

9/16/78 - 9/28/78 At 0750 hours0.00868 days 0.208 hours 0.00124 weeks 2.85375e-4 months on September 16, 1978, reactor power was increased and attained 100 percent full power at 0930 hours0.0108 days 0.258 hours 0.00154 weeks 3.53865e-4 months on September 16, 1978. This power level was maintained un-til.0225 hours0.0026 days 0.0625 hours 3.720238e-4 weeks 8.56125e-5 months on September 28, 1978 when the reactor tripped.

i 9/28/78 - 9/30/78 The reactor tripped at 0225 hours0.0026 days 0.0625 hours 3.720238e-4 weeks 8.56125e-5 months on September 28,1978 because of reactor coolant system (RCS) low pressure.

The RCS low pressure occurred when the steam generators were overfed during an attempt to stabilize plant para-The transient parameters were caused by the f ailure meters.

of the RCS flow transmitter for Loop 2 of the RCS. The unit outage continued the remainder of this month.

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FACILITY CRANCE REQUESTS COMPLETED DURING SEPTEMBER, 1978 FCR NO:

77-207 SYSTEM:

Safety Features Actuation System (SFAS)

COHPONENT: Spare Field Cable L432D/L434D CHANGE, TEST, OR EXPERIMENT: On August 't5,1978, work was completed which lif ted spare field cable L432D/L434D fromNTerminal Board 65, Terminals 6 and 7 in SFAS Channel.4 (Cabinet C 5756C), and labeled the cable as a spare. The applicabic drawings already showed the cable as a spare.

REASON FOR FCR: Cable L432D/L434D was no longer an active SFAS cable.

It was a spare cable attached to Terminal Board 65, Terminals 6 and 7 with non-conduct-ing plastic screws. There was no electrical connection, and hence no effect on SFAS operation.

SAFETY EVALUATION:

This FCR was reviewed by the unit architect / engineer, Bechtel Corporation, who determined that the subject terminations should indeed be dis-connected and tagged as spare conductors in the SFAS Cabinet. There is no un-reviewed safety issue when spare wires which were attached with insulated plastic screws are lif ted and tagged as spores.

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ML20147C865

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