ML20127B520

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Rev 13 to Procedure 05-1-02-I-4, Loss of Offsite Power
ML20127B520
Person / Time
Site: Grand Gulf, 05000000
Issue date: 04/14/1984
From:
MISSISSIPPI POWER & LIGHT CO.
To:
Shared Package
ML19263A614 List:
References
FOIA-84-459 05-1-02-I-4, 5-1-2-I-4, NUDOCS 8404260470
Download: ML20127B520 (7)
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Text

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,, j ,, PLANT OPERATIONS MANUAL

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volume 05 05-142-I-A

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Revision: 13

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0FF-NORMAL EVENT PROCEDURE LOSS OF OFFSITE POWER SAFETY RELATED .

Prepared: _ .b '.. - d+ - - ~a ,

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Reviewed: / j'/. d. }; / f. ff Nuclear Plant Quality Superintendent Tecnnical Review Approved:

7 Operattons Superintendent i

List of Effective Pages:

Pace:

1-4 List of TCN's Incorporated:  ?

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Revision TCN No. _,

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  • OFF-NCRMAL EVENT PRCCE?mE GRAND GULF NUCLEAR STATION No.: 05-1-02-I-4 Rrvision: 13 Paga: 1 Tities Lv3a of Of fsita Power

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1.0 PURPOSE / DISCUSSION ,,

__ , 1 1.1 To provide instructions.for.the.Yp'erator -in thh' e. vent 500' KV power is lost, or two or more offsite power s'upplies'are lost .

1.2 This procedure may interface with ONEP 05-1-02-I-1, Reactor Scran, and with the Emeroency Procedure and the Emeroency Plan.

1.3 Unit service power, when being supplied from the 500 KV Switchyard and the 115 KV Offsite circuit, normally feeds 4 KV ESF Busces 15AA, 16A5 1 and 17AC from ESF Transformer 11,12 or 21. Each 'ESF Transformer has been sized to handle the power recuired to start the ESF loads of one unit due to a LOCA and run the ESF loads of the other tnit required for safe shutdown.

Should offsite power become totally unavailable, three (3) enercency diesel cenerators are provided for each unit. Two of the three ciesels in each unit can provide the necessary power for a plant ccolaown er far ESF system requirements. A Gas Turbine Generator (GTG) System is available, should both STBY D/G' and 0/G12 diesel generators fail to sucply t: eir <

respective buses.

2.0 SYMPTOMS

2.1 Loss of AC power to running equipment 2.2 Loss of normal lighting 2.3 Reactor Scram 2.4 Turbine Trip 2.5 Division I, II, and III, emergency diesel generators auto-start and energize their respective busses, unless ESF Power is beino appliwi fra-the 115 KV line (ESF transformer 12).

2.6 Load dispatcher or other indications define a degraded offsite power '

condition.

i 3.0 AUTOMATIC ACTIONS 3.1 Main Generator load reject, causing a turbine trip f

3.2 Reactor Scram j

3.3 MSIV's trip closed (due to loss of so'lenoid power) 3.4 Condensate Pump, Condensate Booster Pump, and Reactor Feed Puma !.arbine Trip 3.5 Reactor Recire Pumps trip O

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^ ' GRAND GUlr NUCLEAR STATZON , OFF-NORMAL E\ENT Po"*E2*EE Iitie: Loss of Offsite Power No.: 05-1-02-14 Revision: 13 , Page: 2 7 t .

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3.6 Cire Water Pumps trip (Turbine Bypass System operation' blocked on decreasing Main Condenser;vacuumhv c

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.  ; 1 3.7 Safety / Relief Valves operate to control rea'clor pressure.

3.8 Reactor water level decreases to low-Icw water level 2, initiating "PCS and RCIC.

3.9 LSS system sheds loads from ESF 4 KV buses 15AA and 16AB and Emeroency Diesel Generator 11,12 and 13 auto-start and enercize ESF 4 KV Busses 15AA,16AB and 17AC (unless supplied for ESF Transformer 12).

3.10 Group I, II, III, VI, VII, VIII and X Isolations.

3.11 Turbine-Generator emergency oil pump, Generator emergency seal oil et.co.

and RFP Turbine A and B emeroency bearino oil punos auto-start on decreasing oil pressure (250 V DC bus 110r .

3.12 Both diesel-driven Fire Pumps A and B auto-start en Icss of caarcer power.

3.13 120V AC UPS system remains ir ervice.

3.14 Plant DC electrical busses remain in service (powered from their J

respective batteries or battery charcers), suoplyino emeroencv lic :irx2 and communications, RCIC system, and critical plant instrumentation.

3.15 SSW pump will auto start, along with associated sed cooling tcwer 'ans.

4.0 IMMEDIATE OPERATOR ACTION 4.1 Verify emergency diesel generators have started and energized ESF W.'

Busses 15AA, 16AB, and 17AC.

4.1.1 If both SIBY D/G11 and STBY D/G12 fail to energize their I respective busses, notify the GTG System Crew (Phone S0-2iC; or Radio) to start and make ready to load the GTG's. ?.e fe r :,:

Station Blackout Proc. 405-1-02-I-6 for enercizing tusses fem twe GTG's. L 4.2 Carry out the ar.tions of EP-1, Level Control.

4.3 Carry out the actions of ONEP 05-1-02-III-2, Loss o# Cne of Sa:n '25 Busses.

4.3.1 If a scram should have occ'trred, but did not, enter E: 70.

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,. GBAND GULF NUCLEAR STATION (FF-NCRMAL EVENT PROCE'TE Titist Losa of Offsite-Power Ns.: 05-1-02-I-4 Revision: 13 Paga 3

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4.4 Recover from Containment,'Drywell,IIind Auxiliary:8uilding isolations in i

accordance with ONEP 05-1-02-III-5,' Automatic:.Isolations and SOI 04-1-01-M71-1, Containment and Drywell Instrumentation .and Control.

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4.4.1 Check containment

  • parameters and enter EP-3,; as ' required.

% n 5.0 SUBSEQUENT ACTION f.4 2, /T ./ A JE A I 5.ty_ Proceed to implement the Emergency Plan as directed by the Shift Supervisor / Shift Superintendent. .

Sg3 Monitor the emergency diesel generators locally.

5.J' Refer to SOI 04-1-01-R21-1, Load Shedding and Sequencing System, to determine the systems wtich will auto start, and for the systers, whic7 must be started manually.

5.g3 Attempt to locate and correct the power failure. When correctec. re-eneraize the plant as follows:

C 5.t.1 Reset the LSS Panel per SOI 04-1-01-R21-1 as soon as t.,e offsite power is restored.

/ S J.2 Re-energize major busses.

5. 3 Insure all large motors have a stop signal.

5.h.4 Reset the bus undervoltage lockout relays. I 5.f.5 Re-start systems per the respective SOI's as needed.

5.f.6 Return ESF busses from the diesel / generators to normal power per SOI 04-1-01-P75-1 and 04-1-01-P81-1.

5.4 Ensure t"' Main Turbine DC emergency oil pump supplies lubricating oil'

- during tne roll-down to zero speed and for at least 15 minutes thereafter. ,

? I 5.,f Ensure the Reactor Feed Pump Turbine A and B DC emergency bearing oil pumps supply lubricating oil during roll-down to zero speed eN for at least 15 minutes thereafter.

5.7 I If power outage appears to be of long duration (greater than approximately 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />), the following additional actions should be taken:

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5. 7.1 Place the Reactor in a Cold Shutdown condition in accordance with 101 03-1-01-3, Plant Shutdown.

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. GRAND GULF NUCLEAR STATION CFF-NCRMAL EVENT .:RCCri.EE

Title:

Losa of Offsits Pcwer No.: 05-1-02-I-4 Rcvision: 13 Paga r a j j

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5./.2 Each ESF battery bank 11DA,1108, and 11DC is sized to supply the required DC loads for 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />, after a loss of AC power to both battery chargers. Return both battery chargers to service for eacn ESF battery bus 11DA and 1108 and one charger for bus 11DC.

T 5.//.3 Each BOP battery bank is sized to supply all connected loads (including bus 110F) for 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> after a loss of AC power to b:1-battery chargers. Return both battery chargers to service for esen BOP battery bank.

5 .,1. 4 Notify the GTG System crew to start the Gas Turbines and place them in standby.

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E @0} q g FROM: SAM H. HOBBS DATE: 104k e l l Ext. 458; Loc. 24 ,

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SUBJECT:

T[ccenct AO b%er f b Thecd'ir 4

'\ J.B. RICH $1D 1

\ J. P. McGAUGHY hDN' C.

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\ JUDY HUG S Y Information Signature Action

\T. M. J SON Comments File Approval C. L. ONE REMARKS / REPLY:

LYN SUD.ECK MARCIA SMITH J. RI SON fy W b.$r'cf Q_r p~ ROOits ah (Oc~o c e euS LINd MILLER \

P. . RICHARDSON /,c[,"c k d re re f p:e n nln

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P HUGHES J G. ESARE OF N( b e- /A irb Wa A be M .d i J .#/H. (TARLING Pj B. BtNEDICT G. W. DELANEY M6 d.)k o (( ice (_ '

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