ML20054K021
| ML20054K021 | |
| Person / Time | |
|---|---|
| Site: | Grand Gulf  |
| Issue date: | 03/19/1982 |
| From: | MISSISSIPPI POWER & LIGHT CO. |
| To: | |
| Shared Package | |
| ML20054J949 | List:
|
| References | |
| 05-1-02-V-9, 5-1-2-V-9, NUDOCS 8206300306 | |
| Download: ML20054K021 (7) | |
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l PLANT OPERATIONS MANUAL i
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Volume 05 05-1-02-V-9 Section 02 Revision:
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Date: 3-19-82 t
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1 0FF NORMAL EVENT PROCEDURE LOSS OF INSTRUMENT AIR SAFETY RELATED
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Nuclear Plant Qtfality Superintendent Techtfical Review Reviewed:
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Dperat io Superintendent 1
Approved:
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' Ass'ist' ant nt ana PSRC:
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1 List of Effective Pages:
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Revis ion :
1-6 10 8206300306 820625 PDR ADOCK 05000416 P
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GRAND GULF NUCLEAR STATION OFF-NORMAL EVENT PROCEDURE l
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Title:
Loss of Instrument Air INo.:
05-1-02-V-9 IRevision:
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1.0 PURPOSE / DISCUSSION 1.1 The purpose of this procedure is to provide guidance to the operators in the event that instrument air system air pressure is lost.
1.2 This procedure may interface with the Emergency Plan.
1.3 A total loss of instrument air pressure may be caused by a break in the instrument air header, or by a loss of all air compressor. A multitude 1
of actions occur as a result of low instrument air supply pressure.
These actions occur at various times depending upon the rate of the instrument air pressure drop. The actions listed in 3.0 automatic actions are listed starting b2 descending order.
2.0 SYMPTOMS 2.1 On a loss of instrument air pressure, all the following alarms and indications may be received:
2.1.1 INSTR AIR COMPR Trip IH13-P870 2.1.2 INSTR AIR RCVR PRESS LO 1H13-P870 2.1.3 INSTR AIR DRYR TROUBLE, lH13-P870
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2.1.4 INSTR AIR BST CHPR DISCH PRESS LO 2.1.5 CTMT INSTR AIR SPLY FLO HI 2.1.6 CTMT INSTR AIR ADS FLO HI IH13-P870 2.1.7 Instrument Air HDR, Pressure on Panel 1H13-P870 Decreasing 2.1.8 SVC AIR COMPR A TRIP IH13-P854 2.1.9 SVC AIR GOMPR B TRIP IH13-P854 t
2.1.10 SVC AIR SPLY HDR PRESS LO IH13-P854 2.1.11 SVC AIR RCVC A or B PRESS LO 1H13-P854 2.1.12 SVC AIR COMPR DISCH HDR PRESS 1H13-P854 Decreasing 3.3 AUTOMATIC ACTION 3.1 Control rods individually scram in as the scram valves fail open and the instrument volume vent and drain valves fail closed.
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GRAND CULF NUCLEAR STATION OFF-NORMAL EVENT PROCEDURE l Tit le : Loss of Instrument Sir lNo.:
05-1-02-V-9 l Revision:
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I 3.2 The circulating water pumps trip 3.3 The Turbine Trips on low vacuum 3.4 Steam Supply to the SJAE's is lost 3.5 Plant Service Water is lost to all but the SJAE Intercondensers and the I
Mechanical Vacuum Pumps.
3.6 Loss of Drywell Cooling due to the closure of air-operated dampers.
3.7 Loss of Containment Cooiing, due to the closure of air-operated dampers.
3.8 Loss of Steam Tunnel Coolers 3.9 The Containment Purge Mode and the Normal Drywell Vacuum Relief Mode of the Combustible Cas Control System is lost.
3.10 In the Offgas system the valve stem seal air is lost, possibly causing high radiation levels in Offgas Building. Air operated valves generally fail as is. The Charcoal Adsorber Startup Bypass Valve Fails closed, the Charcoal Adsorber Inlet Valves fail open, the Of fgas Outlet Valve Fails j
open.
3.11 RHR Steam Condensing Mode is lost.
j 3.12 RWCU is lost.
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3.13 Radwaste Building Supply and Exhaust fans trip as supply and exhaust I
dampers close.
l 3.14 The Control Room HVAC system isolates, and the SSW flow control valve to the Control Room Air Conditioner condenser fails open.
3.15 The Computer Rooms Fan Coil Units trip as inlet and outlet dampers close.
Outside supply air is lost to the Control Building Fan Coil Unit, but they continue to recirculate air. Also, the Control Building Hood Exhaust Fan inlet damper fails closed.
3.16 The Safeguard Switchgear and Battery Rooms Ventilation system dampers fails open to provide maximum cooling.
3.17 The Auxiliary Building HVAC System outside air suction line is isolated,
but the Auxiliary Building Fan Coil Units continue to recirculate air.
The exhaust dampers on the Main Steam Tunnel Cooler Outside Containment also fail closed.
3.18 The Fuel Handling Area Supply and Exhaust fans and the Fuel Pool Sweep Supt y and Exhaust fans are isolated by closure of the fan inlet and l
outlet dampers and the outside air inlet and outlet dampers. The Fuel Handling Area Fan Coil Units continue to recirculate air.
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I GRAND GULF NUCLEAR STATION OFF-NORMAL EVENT PROCEDURE
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Title:
Loss of Instrument Air lNo.:
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A 3.19 The Turbine Building Exhaust Fans trip as the inlet and outlet dampers to atmosphere fails close. Also, the pressure control damper exhaust closed.
3.20 Loss of first stage reheating steam.
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3.21 All bleeder trip valves close, causing loss of steam flow to the High Pressure Feedwater Heaters and the Seal Steam Generator.
3.22 Normal drain valves for the feedwater heaters, heater drain tank, and MS/R drain tanks fail closed, while the dump valves fail open.
3.23 Condensate makeup / reject valves, the makeup water treatment hotwell i
supply valve, and the condensate drain tank level control valve fail closed.
3.24 The condensate Demineralizers are isolated, and the Condensate Demineralizer Bypass Valve Fails open.
3.25 The condensate pump, cobdensate booster pump, and reactor' feed pump minimum flow valve fail open.
3.26 The Feedwater Startup Flow Control Valve and Cleanup Recirculation Valve
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fail closed.
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3 27 Feedwater heater startup vent valves fail closed.
3.28 Main steam drain valves fail closed and operating drains fail open.
3.29 The circulating water blow down valves and plant service water reject valve fail closed and the plant service water heat exchanger bypass valve fails open.
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3.30 The Fuel Pool Cooling and Cleanup Filter /demineralizer isolate and the
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, bypass valve opens. ' Normal makeup',to' the pools 'from the CST' is lost.
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Also,- the Cask Storage Pool fill and drain line isolates.
3.31 Condensate Transfer system pressure is lost as the Condensate Transfer 1
Pump discharge valves closes and the pump minimum flow valve opens.
l 3.32 The HPCS/RCIC test return line to the CST (Valves Pil-F064 and Pil-F065) j.
fail closed.
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3.33 The Refueling Water' Storage kank butlet valves aNd the Refueling Water
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4 Transfer pump Suppression Pool Suction valves is olat e,
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r i t GRAND CULF NUCLEAR STATION OFF-NORMAL EVENT PROCEDURE
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Title:
Loss of Instrument Air lNo.:
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b 3.34 Makeup to the SSW basin and fill tank is lost, as is acid and hypochlorite supply to the SSW basins.
3.35 TBCW makeup valve fails open, causing the TBCW surge tank to overflow.
No TBCW cooling is available since PSW is lost. All TBCW temperature control valves fail open. TBCW pump minimum flow valve fails closed.
3.36 The makeup valve to the CCW surge tank and the CCW pump minimum flow valve fail closed. No CCW cooling is available since PSW is lost.
t 3.37 Plant Chilled Water is lost as the chillers trip due to loss of PSW.
Makeup to the chilled water expansion tank fails' closed.
3.38 Suppression Pool Cleanup is lost.
3.39 The Drywell, Containment, and the Auxiliary Building Floor, Equipment, and Chemical drains are isolated. Also, the Condensate Clean Waste Pupp i
is isolated on the suction and discharge, preventing pumping from the Condensate Clean Waste Tank.
3.40 Standby Liquid control Storage Tank level indication is lost.
3.41 All caustic transfer from the Makeup Water Treatment System is lost.
3.42 Acid transfer from the Makeup Water Treatment System to SSW, Condensate Cleanup, and Circulating Water system is lost.
l 3.43 The mechanical vacuum pump cannot be started, but will not trip if i
already operating. This is because the air operated valves fail as-is.
8 3.44 Makeup to the Demineralizer Water Storage tank is lost.
3.45 The Chlorination System is lost.
3.46 Liquid and Solid Radwaste systems are lost.
3.47 The Lube Oil Conditioning system is lost.
i 3.48 Loss of Auxiliary Steam.
4.0 IMMEDIATE OPERATOR ACTIONS 4.1 Inform the Shift Supervisor or Shift Superintendent of plant cond it ions.
4.2 When multiple individual control rod scrams occur, or when it is determined that ins t rument air cannot be restored, Eanually scram the reactor and refer to ONEP 05-1-01-1-1, Reactor Scram.
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OFF-NORMAL EVENT PROCEDURE l
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Loss of Instrument Air lNo.:
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4.3 When seal steam is lost to the main turbine, break condenser vacuum by opening the vacuum breakers. Verify the MSIV's close, bypass valves close, and the Reactor Feed Pump Turbines trip on low condenser vacuum with HSIV's closed.
Refer to EP-1 Level Control.
4.4 Manually initiate SSW Loop A and Loop B in accordance with SOI 04-1-01-P41-1.
If the air compressors were lost due to a loss of cooling water, perform the following valve lineup.
o NOTE If a low reactor level of -150 inches or a drywell pressure of 1.73 psig exists these valves will not operate.
4.4.1 Close IP44-F173, PSW to SSW XTIE (Local) 4.4.2 Open IP41-F154, SSW RTN FM AIR COMPRS (lH13-P870, 7C) 4.4.3 Open IP41-F155A, SSW OTBD SPLY TO AIR COMPRS (1H13-P870, 7C) 4.4.4 Open IP41-F155B, SSW INBD SPLY TO AIR COMPRS (lH13-P870, 7C) 4.5 After SSW is supplied to the air compressors, attempt to restart an air-4'}
compressor and regain instrument air.
4.6 If drywell pressure increases to 1.73 psig, refer to containment control EP-3.
5.0 SUBSEQUENT OPERATOR ACTIONS 5.1 Implement the Emergency Plan and Emergency Procedures as directed by the Shif t Supervisor or Shift Superintendent.
5.2 Supply SSW to the CCW Heat Exchangers by performing the folloing steps if instrument air has not -been recovered.
5.2.1 Close IP44-F011, PSW Normal Return (Local) 5.2.2 Close IP44-F115, PSW Supply to Chiller (Local) 5.2.3 Close 1544-F068, PSW RTN HDR FM CTMT (IH13-P870,10C)
'5.2.4 Open IP44-F054, SSW INBD SPLY TO DRWL CLR/CCW HX (IH13-P780, 7C) 5.2.5 Open IP44-F042, SSW OTBD SPLY TO DRWL CLRS/CCW HX (1H13-P870, 7C) 5.2.6 Open IP44-F067, SSW RTN FM DRWL CLRS/CCW HXS
GRAND GULF NUCLEAR STATION OFF-NORMAL EVENT PROCEDURE
Title:
Loss of Instrument Air No.:
05-1-02-V-9 Revision:
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N 5.3 Initiate suppression pool cooling on RHR Loop A in accordance with SOI 04-1-01-E12-1.
5.4 If the loss of instrument air was due to a major break in the system, locate the break and isolate it with the nearest header isolation valve.
If header pressure is lost completely, compressed air or nitrogen must be supplied for seal air in order to restart the compressors.
i 5.5 Initiate the control room standby fresh air unit in accordnace with SOI 04-S-01-Z51-1 if not already in operation.
5.6 Notify plant personnel that high radiation and airborne levels may exist in the Radwaste Building, Turbine Building, and Offgas Building.
Notify Health Physics to perform surveys of the plant.
5.7 Continue plant shutdown and cooldown in accordance with 101 03-1-01-3, Plant Shutdown.
5.8 When instrument air is restored, restart systems in accordance with their respective SOI's.
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