ML20054J965

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Offnormal Event Procedure 05-1-02-I-4, Loss of Offsite Power,Safety-Related, Revision 11
ML20054J965
Person / Time
Site: Grand Gulf  Entergy icon.png
Issue date: 06/14/1982
From:
MISSISSIPPI POWER & LIGHT CO.
To:
Shared Package
ML20054J949 List:
References
05-1-02-I-4, 5-1-2-I-4, NUDOCS 8206300246
Download: ML20054J965 (4)
v • d • e


Text

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    • " ** PLANT OPERATIONS MANUAL Volume 05 03-1-02-I-4 Section 02 Revision: 11 Date: 6-14-82 OFF-NORMAL EVENT PROCEDURE

! LOSS OF OFFSITE POWER SAFETY RELATED Prepared: w _) .

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Reviewed: -

_ Nuclear. Plant Quality supe.rintehdent clinigf1 Review . . . _

Approved: C Opergion Superin nde .

Concurrence:

stani Plan M' A ger PSRC:

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./ r List of Effective Pages:

Page: -,

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List of TCN's Ir.corporated:

Revision TCN No.

10 None 11 None 8206300246 820625 -

PDR ADOCK 05000416 p PDR

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GRAND GULF NUCLEAR STATION OFF-NORMAL EVENT PROCEDURE l

Title:

Loss of Offsite Power lNo.: 05-1-02-I-4 l Revision: 11 lPage: 1 l 1 I I I I 1.0 PURPOSE / DISCUSSION 1.1 To provide instructions for the operator in the event 500 KV power is lost.

l '. 2 This procedure may interface with ONEP 05-1-02-I-1, Reactor Scram, and with the Emergency Procedure and the Emergency 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 Buses 15AA, 16AB and 17AC from ESF Transformer 11, 12 or 21. Each ESF Transformer has been sized to handle the power required to start the ESF loads of one unit due to a LOCA and run the ESF loads of the other unit required for safe shutdown.

Should offsite power become totally unavailable, three (3) emergency diesel generators are provided for each unit. Two of the three diesels in each unit can provide the necessary power for a plant cooldown or for ESF system requirements.

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2.0 _SYMPTOMSr - ,

- == --'~-' - * + ~ t 2.1 Loss of AC power to running equipment

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2.2 Loss of normal 1ighting ,

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 being applied from the 115 KV line (ESF transformer 12).

,,_ 3.0 AUTOMATICACTIONS[ ,

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3.1 Main Generator load reject, causi'ng a turbine trip 3.2 Reactor Scram 3.3 MSIV's trip closed (due to loss of solenoid power) ,

3.4 Condensate Pump, Condensate Booster Pump, and Reactor Feed Pump Turbine Trip 3.5 Reactor Recire Pumps trip I

.s .s .

GRAND GULF NUCLEAR STATION OFF-NORMAL EVENT PROCEDURE

Title:

Loss of Offsite Power No.: 05-1-02-I-4 Revision: 11 Page: 2 3.6 Cire Water Pumps trip (Turbine Bypass System operation blocked on decreasing Main Condenser vacuum) 3.7 Safety / Relief Valves operate to control reactor pressure.

3.8 Reactor water level decreases to low-low water level 2, initiating RPCS and RCIC.

3.9 LSS system sheds loads from ESF 4 KV Busses 15AA and 16AB and Emergency Diesel Generator 11, 12 and 13 auto-start and energize ESF 4 KV Busses

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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 pump, and RFP Turbine A and B emergency bearing oil pumps auto-start on decreasing oil pressure (250 V DC bus llDF). ,e 3.12 Both diesel-driven Fire Pumps A and B auto-start on loss of charger power. .- -

3.13 120V AC UPS system remains in service.

3.14 Plant DC electrical busses remain in service (powered from their respective batteries or battery chargers), supplying emergency light'ing and communications, RCIC system, and critical plant instrumentation.

3.15 SSW pump will auto start, along with associated SSW cooling tower fans.

4.0 IEEDIATE OPERATOR ACTION 4.1 Verify emergency diesel generators have started and energized ESF 4KV

' Busses 15AA, 16AB, and 17AC.

_,. . 4.2 Carry out the actions of EP-1, Level Control.

4.3 Carry out the actions of ONEP 05-1-02-III-2, Loss of One or Both RPS Busses.

4.4 Recover from Containment, Drywell, and Auxiliary Building islolations in accordance with ONEP 05-1-02-III-5, Automatic Isolations, and SOI 04-1-01-M71-1 containment and Drywell instrumentation and control.

5.0 SUBSEQUENT ACTION 5.1 Proceed to implement the Emergency Plan as directed by the Shift

( Supervisor / Shift Superintendent.

5.2 Monitor the emergency diesel generators locally.

5.3 RefertoSOI04-1-01-R21-1Joadsheddingandgequencingsystem[to determine the systens which will $uto start, and for the "systers which must be started manually. ,

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4. 4 GRAND GULF NUCLEAR STATION OFF-NORMAL EVENT PROCEDURE

Title:

Loss of Offsite Power lNo.: 05-1-02-1-4 Revision: 11 Page: 3 I

5.4 Attempt to locate and correct the power failure. When corrected, re-ener iz k the plant as follows: '

S. 4. I WM L 4 S && Sc1' of-l-0/-f.;2/~l "M ,

5.4 /12- Re energize major busses. ,

5.4.T3 Insure all large motors have a stop signal, j 5.4. 5 f Re se t the bus undervoltage lockout relays.

5 .4.$ 5~Re-s t a r t systems per the respective SOI's as needed.

5.4.74 Return ESF busses from the diesel / generators to normal power per Sol 04-1-01-P75-1 and 04-1-01-P81-1.

5.5 Ensure the Main Turbine DC emergency oil pump supplies lubricating ofl during the roll-down to zero speed and for at least 15 minutes thereafter.

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5.6 Ensure the Reactor Feed Pump Turbine A and B DC emergency bearing oil .

ptmps supply lubricating oil during roll-down to zero speed and for at least 15 minutes thereafter. _

5.7 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:

Place the' Reactor in a Cold Shutd'own condition in accordapce with 5.'7. l~

101 03-1-01-3, Plant Shutdown.

5.7.2 Each ESF battery bank llDA, llDB, and llDC is sized to supply.the I 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 each ESF battery bus llDA and llDB and one charger for bus llDC.

! 5.7.3 Each BOP battery bank is sized to supply all connected loads 6 (including bus llDF) 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 both battery chargers. Return both battery chargers to service for each BOP battery bank.

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