ML20125D740

Monthly Operating Rept for Dec 1979

ML20125D740
Person / Time
Site:	Rancho Seco
Issue date:	01/07/1980
From:	Columbo R SACRAMENTO MUNICIPAL UTILITY DISTRICT
To:
Shared Package
ML20125D729	List: ML20125D728 ML20125D740
References
NUDOCS 8001150495
Download: ML20125D740 (5)

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NARRATIVE

SUMMARY

OF PLANT OPEPATIONS 12-1 Plant operating at approximately 100% full power. Performed routine to surveillance and preventive maintenance items.

12-14 12-16 (0825) Started STP-220 (APSR uthdrawal) and placed rods in manual.

(0922) Lowering power to 50% _ at 10 FN/ min.

(0947) Reactor at 50% power. Started pulling rod group #8 per STP-220.

(1032). Group #8 at 100% withdrawn.

(1036) Raising Reactor power to 70%. ~

(1115) Reactor at 67% (600 FMe) on 5-hour hold. ,

(1630) Began increasing Reactor power at 3%/ hour.

(2106) Stopped power increase at 87% (780 tMe) due to large negative imbalance.

(2220) Imbalance satisfactory, began increasing power to 90%.

(2320) Reactor at 90% power (830 FMe).

' 12-17 (0206) Started increasing power to 100% at 3%/ hour. -

(0528) Reactor at 100% (900 MWe). Completed STP-220.

12-21 *

(0920) Recalibrated Feedwater flows in computer; resulting reactor thermal power indicates 96%.

(1140) Began increasing power to 100%.

(1500) Peactor at 100% (945 FMe).

PERSONNEL CHANGES REQUIRING REPORTING No personnel changes that require reporting in accordance with Technical Specifications Figure 6.9-2 were made in Decepber, 1979.

MAJOR ITEMS OF -SAFETY-RELATED MAIN?ENANCE O 1. Continued inspection / testing of pipe supports; repaired or replaced as necessary to meet the new criteria covered in Bulletin 79-02.

2. Repaired socket weld on drain line (23620-4"-CA) of Makeup Pump Discharge Header (LER 79-20).

8001150 l

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FIFUELING I!.* FOPS \TIO;* REQUEST Rancho Seco Unit 1 ,

1. Usee of racility:

l January 19, 1979

2. Scheduled date for next refueling shutdown:

'3. Scheduled date for restart following refueling: _ _ M, r ,- h . 197o 4; Technical Specification change or other license anendment required:

a) Change to Rod Index vs. Poscr Level Curve (TS 3.5.2) b) Change to Core Imbalance vs. Pouer Level curve (TS 3.5.2)

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c) Tilt Limits (TS 3'.5.2) d) Safety Equipment Testing (TS 3.3.3) ,

5. Scheduled date(s) for subnitting proposed licensing action: December,1979 None .

6. Important licensing considerations associated with refueling:

(] -

7. Eumber of fuel assemblies: ,

177 a) In the core: .

b) In the Spent Tuc1 Pool: 112 Present licensed spent'fuc1 capacity: 579 8.

9. Projected date of the last refueling that can be discharged to the Spent Fuel Pool: 1987 e

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. AVERAGE DAILY UNIT POWER LEVEL DOCKET NO. 50-312 UNIT Rancho Seco Unit 1

. DATE 12-31 COMPLETED BY R. W. Colombo TELEPl!ONE 916-452-3211 December, 1979 MONTil DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL j (MWe Net) (Mwe. Net) 3 860 -

849 g7 2 858 13 851 3 859 862 39 4

860 862 g

5 _ 858 21 879 6- 858 22 903 7 R99 23 902 O 8 859 24 ' 901 9 R69 03

,25 .

10 862 904 26 11 860 904 27

. 12 864 904 28 13 862 903 29 14 RA9 896 30 15 864 894

, 3 16 714 INSTRUCTIONS l On this fannat.hst the aserne daily' unit power lesel in MWe Net for each day in the reportin,e month. Compute to the nearest whole inegawatt.

'3 90022,59 ("""

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OPERATLNG DATA REPORT ,

O DOCKET NO. 50-312 l DATE 79-12-31 CO31PLETED BY R. W. Colombo TELEPilONE 41 A-m-Ull.

OPERATING STATUS .

December 21, 1979 -

I. Unit N~ame: Rancho Seco Unit One Notes Feedwater flow / heat balance

2. Reporting Period: December, 1979 recalibrated in computer mon-2772 itoring system. Resultant

3. Licensed Thermal Power (MWt):

4. Nameptate Rating (Gross MWe):

• thermal power level - 96%

5. Design Electrical R: ting (Net 31We): 918 (905 MWe). Raised power to

6. Maximum Dependable Capacity (Gross 31We): 917 100% (945 MWe) at 1500.

7. Maximum Dependable Capacity (Net .\lWe): 873 .

8. If Changes Occur in Capacity Ratings (Irems Number 3 Through 7) Since Last Report. Gise Reasons:

N/A .

9. Power Lesel To Which Restricted. If Any (Net MWe): N/A .

l 10.~ Reasons For Restrictions. If Any: N/A I O .. rai,Meeis vr..te.Date Cemeieti,e

~11. Hours In Reporting Period 744 8,760 41,257

12. Number Of flours Reactor Was Critical 744 7,002.7 26,073.5

13. Reactor Resene Shutdown flours 0 1,5'57.7 3,975.1

14. Ilours Generatar On Line ,

744 6,778.1 24,941.3 1

15. Unit Resene Shutdown Hours 0 1.199.3 1.210.2

16. Gross Thermal Energy Generated (MWH) 1.975.283 17,914,594* 62,984,018*

17. Gross Electrical Energy Generated (MbII) 66 8 d0,6, .,, 6,021,736 -21,284,536

18. Net Electrical Energy Generated (MWil) 636,415 5,711,999 20,110,889

19. Unit Seruce Factor 1.00.0 77.4 60.5 l

20. Unit Aui! ability Facter 100.0 91.1 63.4 l

21. Unit Capacity Faetor (Using 3lDC Net) -

98.0 74.7 n.6

22. Unit Capacity Factor IU,ing DER Net) 93.2 71.0 53.1

23. Unit Forced Outage Rate 0 5.6 32.0

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24. Shutdoans Scheduled Oser Next 6 Month > (Type: Date,and Duration of Each e. .

Refueling: January 19, 1980 - duration approximately 60 days

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

26. Units in Test Status tPrior to Commercial Operation): Forecast Achined INITIA L CRITICA LITY N/A N/A ~

INITIAL ELECTRICITY .

N/A N/A COMMERCIAL OPER \ TION N/A N/A

• Heat balance /feedwater flows recalibrated. Total thermal MWil recalculated to reflect the adjustment.

, . 90022 60 u

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UNITSIIUTDOWNS AND POWER REDUCTIONS DOCKET NO. 50-312 UNIT N AME Rancho Seco Unit One

. DATE 79-12-31 e COMpLET ED ItY R. U. Col o+ o REPORT MONTII December. 1979 TELEPilONE 916-65'-1'11 nN

-, 3g };; Yh Licer.sce ,E3, b% Cause & Currectise No. Date Q 3g jss Event -

El gl Action to '

t- y_ $ jgg Report c en U gU Prevent Recurrence O

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20 79-12-16 S 0 F 1 .N/A N/A N/A Reduced power for Ax'ial. Power Shaping Rods withdrawal (STP-220).

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I 2 3 4 F: Forced Reason: Method:

S: Scheduled Exlubit G - Instrucriens A-Eqt:ipment Failure (Explair) ' l-Manual for P:cparation of Data n Maintenance of Test 2-Manual Scram. Entry Sheets for Licensee C-Rcrueling 3-Automatic Scram. Event Report (LE R) File (NUREG.

D Rei;uhtory Restrictie,n 4-Other (Explain) 0161)

E-Operator Training & License Examination F-Adnunist rative 5 G-Operational Error (Explain) Exhibit ! - Same Source (9/77) Il-Other (Explain) e 9 9

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