NL-89-634, Monthly Operating Rept for Aug 1989 for Rancho Seco Nuclear Generating Station

Monthly Operating Rept for Aug 1989 for Rancho Seco Nuclear Generating Station

ML20247J746
Person / Time
Site:	Rancho Seco
Issue date:	08/31/1989
From:	Crunk S, Mueller M SACRAMENTO MUNICIPAL UTILITY DISTRICT
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NL-89-634, NUDOCS 8909200268
Download: ML20247J746 (7)

Text

{{#Wiki_filter:-- ~ ~ ~~ ~~ ~' p ( . y s , ;) :a q;,; .L b ;(]suun SACRAMENTO MUNICIPAL UTILITY DISTFttCT 'O 6201 S Street, P.O. Box 15830. Secramento CA 95852-1830,(916) 452-3211-AN ELECTRIC SYSTEM SERVING THE HEART OF CALIFORNIA

  ,               NL 89-634-September 14,.1989-l I

U. S. Nuclear Regulatory Commission Attn: Document Control Desk Hashington, DC 20555 Docket No. 50-312' Rancho Seco Nuclear Generating Station License No.'DPR-54 OPERATING PLANT STATUS REPORT

                 . Attention: George Knighton Enclosed is the August 1989 Monthly Operating Plant Status Report for the Rancho Seco Nuclear Generating Station. The District submits this report pursuant to Technical Specification 6.9.3.

Sincerely,

w. .

                                       +4 Steve L. Crunk Manager, Nuclear Licensing Enc 1 (5)
             ,     cc w/ enc 1:   J. B. Martin, NRC, Halnut Creek A. D'Angelo, NRC, Rancho Seco INP0 R. Twilley, Jr.

9909200268 690831 tl I PDR ADOCK 05000312 R PDC

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            - RANCHO SECO NUCLEAR GENERATING STATION D 14440 Twin Cities Road, Herald, CA 95638-9799;(209) 333-2935

AUGUST 1989

SUMMARY

OF PLANT OPERATIONS Rancho Seco remains in cold shutdown following the negative outcome of a public vote on June 6 regarding continued operation of the plant by SMUD.

SUMMARY

OF CHANGES IN ACCORDANCE HITH 10 CFR 50.59 The plant staff accepted documentation packages for the temporary modifications described below which required detailed afety analyses. These changes were reviewed in accordance with the Technical Smifications by the Plant Review Committee (PRC) and the Management Safety Revicw Committee (MSRC). There were no documentation packages completed f or procedure changes, tests, design changes, or experiments during August 1989.

1. Temporary Modification 89-54 allows 125V d-c buses SOA through S00 to be supported during a loss of offsite power while the specific bus battery is out of service for maintenance. The Updated Safety Analysis Report (USAR) addresses the availability and the malfunction of the d-c buses during the loss of offsite power accident. This temporary modification will ensure that the d-c buses receive power during a loss of offsite power while a battery is being tested. This temporary change does not increase the probability of occurrence or the consequences of an accident or malfunction of equipment important to safety as previously evaluated in the USAR, nor is the possibility for an accident or malfunction of a different type than any evaluated previously in the USAR created. This temporary change does not involve an Unreviewed Safety Question.

2. Temporary Modification 89-55 allows the 125V d-c buses SOA2 through S002 to be supported during a loss of offsite power while the specific bus battery is out of service for maintenance. The USAR addresses the availability and the malfunction of the d-c buses during the loss of offsite power accident. This temporary modification will ensure that the d-c buses receive power during a loss of offsite power while a battery is being tested. This temporary change does not increase the probability of occurrence or the consequences of an accident or malfunction of equipment important to safety as previously evaluated in the USAR, nor is the possibility for an accident or malfunction of a different type than any evaluated previously in the USAR created. This temporary change does not involve an Unreviewed Safety Question.

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MAJOR SAFETY-RELATED MAINTENANCE, TESTS AND MODIFICATIONS NOT REQUIRING DETAILED SAFETY ANALYSES Installation and testing of the fuel handling equipment continued in August 1989.' This work included replacement of carriage wheels and cables, rewiring of the main. fuel handling bridge, main fuel handlit: l bridge electrical panel hookup, tubing modifications for the fuel transfer system, fabrication of the spring pack assembly for the fuel transfer

                       . system, completion of cylinder rack assembly and transfer tube sheave assembly work. Hork also included installation of a cable attachment bracket, fuel mast TV monitor, bridge and trolley camera, fuel handling bridge camera, conduit and cable in the spent fuel building, new fuel elevator motor, fixtures and lamps in the reactor pool, capstan drive and tension assembly, main fuel bridge carriage stop assemblies, and the duct sheave assembly that protects the mechanical cables connected to the fuel assembly components.

The small boiler was placed in wet layup and the reactor coolant system was drained to the 180 inch pressurizer level.

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, REFUELING INFORMATION REQUEST ' q;.

1. 'Name: of Facility. Rancho Seco 2.: Scheduled date forsnext refueling shutdown:

           -3.. Scheduled'date.for restart fo116 wing. refueling: *

4. : Technical.Sprd iication' change or other license amendment required:

5.. Scheduled!date(s) for'. submitting proposed licensing action:

6. Important'11 censing' considerations associated with refueling: *

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

• Plant shut down June'7 following negative outcome of public vote regarding

continued operation of Rancho Seco by SMUD.

i. 3 :. :.,' . - . . '

1 1 AVERAGE DAILY "'4IT POWER LEVEL ~  ! 50-312

                                                                                                                  -DOCKET-NO.

UNIT Rancho Seco DATE 8/31/89

                                                                                                               . COMPLETED.BY                 Maria Mueller          _ _ _

TELEPHONE (916) 452-3211 MONTH Aucust 1989 DAY AVERAGE DAILY. POWER-LEVEL DAY AVERAGE DAILY POWER LEVEL. (MWe-Net) (MHe-Net) 1 =0 17 0 2- 0 18 0 3' >0- 19 0 4 0 20 0 5 0 21 . 0 9 6 0 22 0 1 71 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 l'

14 0 30 0 15 0 31 0 16 0 4 INSTRUCTIONS On this format, list the average daily unit power level in MWc. Net for each day in the reporting month. Compute to the nearest whole megawatt. I

OPERATING DATA REPORT DOCKET NO. 50-312 DATE 8/31/89 COMPLETED BY Marla Hueller TELEPHONE '916)-452-3211 OPERATING STATUS

1. Unit Name: Rancho Stro Notes:

2.- Reporting Period: Auayst 1989

3. Licensed Thermal Power (MHt): 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 HWe): 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

11. Hours in Reporting Period 744 5.831 125.999

12. Number of Hours Reactor Has Critical 0 2.355.7 62.221.5

13. Reactor Reserve Shutdown Hours 744 2.088.4 12.388.6

14. Hours Generatcr On-Line 0 2.217.6 57.811.1

15. Unit Reserve Shutdown Hours 744 2.089.3 3.299.5

16. Gross Thermal Energy Generated (MWH) 0 4.623.125 141.951.953

17. Gross Electrical Energy Generated (MWM) 0 1.575.699 46.223.924

18. Net Electrical Energy Generated (MWH) -4.318 1.430.401 42.474.284

19. Unit Service Factor 0% 38.0%. 45.9%

20. Unit Availability Factor 100.0% 73.9%_ 4B25%

21. Unit Capacity Factor (Using MDC Net) 0% 28.1% 3R161

22. Unit Capacity factor (Using DER Net) 0% 26.7%_ 36.7%

23. Unit Forced Outage Rate 0% 40.7% 42.7%

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

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

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

• Plant shut down June 7 following negative outcome of public vote regarding continued operation of Rancho Seco by SMUD.

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