ML20132E078

Monthly Operating Rept for Aug 1985

ML20132E078
Person / Time
Site:	Rancho Seco
Issue date:	08/31/1985
From:	Colombo R, Reinaldo Rodriguez SACRAMENTO MUNICIPAL UTILITY DISTRICT
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
References
RJR-85-464, NUDOCS 8509300376
Download: ML20132E078 (6)

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AUGUST 1985

SUMMARY

OF PLANT OPERATIONS l

The plant has been in cold shutdown for plant modification for the entire l month of August.

PERSONNEL CHANGES REQUIRING REPORT Mr. Pierre Oubrd, Manager of Nuclear Operations, was reassigned within the District's organization. George A. Coward, Plant Superintendent, assumed the responsibilities of this position on an interim basis effective August 30, 1985.

The District has initiated efforts to select a permanent replacement for the position.

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SUMMARY

OF CHANGES IN ACCORDANCE WITH 10 CFR 50.59(b)

None MAJOR ITEMS OF SAFETY RELATED MAINTENANCE 1

1. An investigation was performed to determine why the raw water pump breaker (4806) did not close properly during the EM 1778 electrical maintenance test. The investigation revealed that the snap ring on the pin on which <i l the trip latch bar rests was missing. The snap ring was replaced and the i breaker was operated twenty (20) times without any failures. All of the other 4160 KV breakers were inspected and the snap rings were found to be i intact.

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2. Boric acid pump P-705B was disassembled to inspect and repair bearing prob-lems. The inner and outer bearings, shaft sleeve, mecahnical seal, and impeller gasket were replaced. Proper assembly of pump was verified per M29.03-48.

3. The carbon adsorber trays of the reactor building purge exhaust air filter l

(A-536) were replaced with trays containing new adsorbent material in accordance with procedure M.105. The replacement was required because the methyl iodide removal efficiency was decreased as a result of painting and welding activities in the reactor building during the refueling outage.

4. The reactor building "A" spray additive isolation valve (SFV-29015) was disassembled to repair a body-to-bonnet leak. The body-to-bonnet gasket was replaced, studs torqued to 130 ft - lb per manufacturer's drawings, and opening and closing times of valve checked.

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REFUELING INFORNATION REQUEST

1. Name of Facility Rancho Seco Unit 1 i

2. Scheduled date for next refueling shutdown: Sept 15.1986

3. Scheduled date for restart following refueling: Jan 15.1987

4. Technical Specification change or other license amendment required:

a) Change to Rod Index vs Power Level Curve (TS 3.5.2) b) Change to Core Imbalance vs Power Level Curve (TS 3.5.2) c) Tilt Limits (TS 3.5.2)

5. Scheduled date(s) for submitting proposed licensing action: April 9. 1986

6. Important licensing considerations associated with refueling: N/A

7. Number of fuel assemblies:

a) In the core: 177 b) In the-Spent Fuel Pool: 316

8. Present licensed spent fuel capacity: 1080

9. Projected date of the last refueling that can be discharged to the-Spent Fuel Pool: December 3. 2001 l

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AVERAGE DAILY UNIT POWER LEVEL DOCKET NO. 50-312 UNIT Rancho Seco Unit 1 DATE 08-31-85 CONPLETED BY R. Colombo TELEPHONE (916) 452-3211 MONTH August 1985 DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net) (MWe-Net) 1 0 17 0 2 0 18 0 _

3 0 19 0 g 4 0 20 0 5 0 21 0

( 6 0 22 0

, 7 0 . 23 0 8 0 24 0 9 0 25 0

, 10 0 26 0 11 0 27 0 12 0 28 0 13 0 29 0 14 0 30 0 l

15 0 31 0 16 0 INSTRUCTIONS On this format, list the average daily unit power level in MWe-Net for each day in the reporting month. Compute to the nearest whole megawatt.

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OPERATING DATA REPORT DOCKET NO. 50-312 l DATE 08/31/85 COMPLETED 8Y R. Colombo TELEPHONE (916) 452-3211 OPERATING STATUS NOTE:

1. Unit Name: Rancho Seco Unit 1 2.- Reporting Period: August 1985

3. Licensed Thermal Power (MWt): 2.772

4. Nameplate Rating (Gross MWe): 963

5. Design Electrical Rating (Net MWe): 918

- 6. Maximum Dependable Capacity (Gross MWe): 917

7. Maximum Dependable Capacity (Net MWe): 873

- 8. If changes Occur in Capacity Ratings (Items Number 3 Through 7) Since Last Report, Give Reasons: N/A 9.- Power Level to Which Restricted, If Any (Net MWe): N/A

10. Reasons For Restrictions, If Any: N/A This Month Yr-to-Date Cumulative 111 ~. Hours in Reporting Period 744 5.831 90.936

12. Number of Hours Reactor Was Critical 0 1.718.5 53.165.9

13. Reactor Reserve Shutdown Hours 0 110.5 10.300.4

- 14. Hours Generator On-Line 0 1.618.2 49.281.7

15. Unit Reserve Shutdown Hours 0 0 1.210.2

16. Gross Thermal Energy Generated (MWH) 0 4.066.973 125.677.241

17. Gross Electrical Energy Generated (MWH) 0 1.366.847 40.798.810 L18. Net ' Electrical Energy Generated (MWH) 0 1.289.988 37.881.184

19. _ Unit Service Factor 0.0% 27.8% 54.2%

20. Unit Availability Factor 0.0% 27.8% 55.5%

21. Unit Capacity Factor (Using MDC Net) 0.0% 25.3% 47.7%

'22. - Unit Capacity Factor (Using DER Net) 0.0% 24.1% 45.4%

23. Unit Forced Outage Rate 0.0% 8.8% 29.4%

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

N/A

25. If Shut Down At End Of Report Period, Estimated Date of Startup:, September 24. 1985

26. Units In Test Status (Prior to Commercial Operation): Forecast Achieved INITIAL CRITICALITY N/A N/A INITIAL ELECTRICITY N/A N/A COMMERCIAL OPERATION N/A N/A t

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UNITSilUTDOWNS AND POWER CSDUCTIONS ~ DOCKET NO. 50-312 UNIT N AME Rancho Seco Unit 1

. DATE 8/31/85 COMPLETEI) IlY R. Colombo REPORT MONT1f AUGUST 1985 TELEl'IlONE , (916) 452-3211

.! E 3y Licensee Es k*. Cause & Corrective No. Date H

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]Yg5 Event 5 g.

NO El

!O Action to

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Report #

O Pievent Recuerco;:e O

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5 8/31/85 S 744 C 1 N/A ZZ ZZZZZZ Refueling Outage i

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4 F: Forced Reason: Method: Exhibit G - Instructions

S. Scheduled A Equipment Failure (Explain) 1-Manual for Preparation of Data i ll-Maintenante of Test 2-Manual Scram. Entry Sheets for I.icensee i C-ItcIncling 3 Automatic Scram. Event Report (LliR) File (NUREG-D Iter.ulatory Restriction 4-Other (Explain) 01611

}, li Operator Training & License Examination F A<hninistrative 5 i G-Operational Error (Explain) Exhibit 1 Same Source

(9/77) Il-Other (Explain) -

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&SMUDSACRAMENTO MUNICIPAL UTILnTY DISTRICT O 6201 S Street. P.O. Box 15830, Sacramento CA 95852-1830,(916) 452-3211 AN ELECTRIC SYSTEM SERVING THE HEART OF CALIFORNIA i

RJR 85-464 September 23, 1985 DIRECTOR 0FFICE OF INSPECTION AND ENFORCEMENT U S NUCLEAR REGULATORY COMMISSION WASHINGTON DC 20555 OPERATING PLANT STATUS REPORT DOCKET NO. 50-312 Erici ed is the August 1985 Monthly Plant Status Report for Rancho Seco Unit o'.s I R. J. RODRIGUE h

ASSISTANT GENERA MANAGER, NUCLEAR Enc 5 cc: I & E Washington (9)

Regior, V MIPC (2)

INPO l

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h1 RANCHO SECO NUCLEAR GENERATING STATION T,1444o Twin Cities Road, Herald, CA 95638-9799;(209) 333 2935

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