ML16207A693
Text
UFSAR Section 7.7
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HIGHEST T AYG NUCL EAR FLUX Sl GH AL I TO STEAM 4----------..,_ ___ _.. TO PRESSURIZER I
DUMP SYSTE!-1 TUR BIN E LO AO Sl GHAL LEVEL PROGRAI~MER t t
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CO NTROL ROO DRI VE POWER REDUNOAN T TRIP SI GN AL REAC TOR TRR I p I~ '
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NOTES: 1.
TAVG Si gnal Obt ai ned From Protection Set Isolator Output CON TRO L ROO AC TUA TOR CtJNTROL ROD ORI VE MECHAM I SM RE A c TO R T R i p I.....,. __ _,
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.._ROD DRIv E POWER SOUTH TEXAS PROJECT UNITS 1 & 2 SIMPLIFIED BLOCK DIAGRAM OF REACTOR CONTROL SYSTEM Figure 7.7-1 Revision 0
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LOW ALARM ALOWAM ZLL = A (AT)AUCT +
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POWER OPERATED RELIEF VALVES PCV-655A AN)
PCV-G56A PRESSURIZER PRESSURE SIGNAL REFERENCE PRESSURE
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POWER OPERATED RELIEF VALVE PCV-G55A PID* I CONTROLLER TO BACkUP HEATER CONTROL IIi TO VARIABLE HEATER CONTROL REMOTE MANUAL POSITIONING I
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CONTROLLER I
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- PID-PROPORTJONAL PLUS INTEGRAL, DERIVATIVE FUNCTION REMOVED.
SOUTH TEXAS PROJECT UNITS 1 & 2 BLOCK DIAGRAM OF PRESSURIZER PRESSURE CONTROL SYSTEM FIGURE 7.7-4 REVISION 6
PRESSURIZER lEVEl SIGNAL PI CONTROLLER.
Auto-Manual Control (Control room):
Auto-Manual Control (Local)
AUCTI OM EERED TAVG -----w LEVEL PROGRAMMER TO BACKUP HEATER CONTROL No Load 1AVG CHARGING FLOW CONTROL VALVE POSITION SOUTH TEXAS PROJECT UNITS 1 & 2 BLOCK DIAGRAM OF PRESSURIZER LEVEL CONTROL SYSTEM Figure 7.7*5 Revision 0
L Steam Flow Signal Remote Manual Positioning LEVEL SETPOlNT Feed water Flow Signal PI Controller Main Feedwater Control Valve Dynamics Main Feedwater Control Valve Position PI Controller Steam Generator Water Level Signal Filter PI Controller Power Range Neutron Flux
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Gain Remote Manual __...,..
Positioning Feedwater Bypass Control Valve Dynamics
- Feedwater Bypass Control Valve Position SOUTH TEXAS PROJECT UNITS 1 & 2 BLOCK OIAGRAU OF STEAM GEI'£RAT~ WATER LEVEL CONTRa. SYSTEM FIGURE 7. 7-6 REVISION 4 e
UJS92.041 li592.Cll _j
MAIN FEEDWATER PUMP DISCHARGE PRESSURE
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v STEAM HEADER PRESSU~E -----"' (-)
PI COMfROLLER TOTAL PLANT STEAM FLOW FILTER
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- NO-LOAD SETPOINT MAIN FEEDWATER PUMP SPEED (All PUMPS)
SOUTH TEXAS PROJECT UNITS 1 & 2 BLOCK DIAGRAM OF MAIN FEEDWATER PUMP SPEED CONTROL SYSTEM Figure 7.7-7 Revision 0
STEAM DUMP CONTROL IN MANUAL (STEAM PRESSURE CONTROL)
TURBINE IMPULSE STAGE PRESSURE RATE/ LAG COMPENSATION
'----.---_..TURBINE TRIP LOAD REJECTION BISTABLE (C-8)
STEAM HEADER-PRESSURE DEFEAT LOAD REJECTION.
. STEAII'DUMP C_O_NTRO L:
ALLOW TURBINE TRIP: - -
STEAMIDUMPCONTROL SET PRESSURE TURBINE TfUP CONTROLLER PI CONTROLLER LOAD REJECTION -.
CONTROL OR TURBINE
- TRIP'CONTROL TAVG NO-LOAD AUCTI OHEERED TAVG LEAD/LAG COMPENSA T1 ON REFERENCE TAVG 8 I STABLES BISTABLES LOAD REJECTION CONTROL LOAD REJECTION CONTROL OR TURBINE TRIP CONTROL TRIP OPEN STEAM DUMP VALVES MANUAL (STEAM PRESSURE CONTROL)
AUTO (TAYG CONTROL)
Note: For blocking and unblocking signals to condenser and atmos-pheric steam dump AIR SUPPLY TO DUMP VALVES MODULATE CONDENSER DUMP VALVES
- valves see Figure 7.2;.11 SOUTH TEXAS PROJECT UNITS 1 & 2 BLOCK DIAGRAM OF STEAM DUMP CONTROL SYSTEM.
Figure 7.7-8 Revision 0
INTERCONNECT:NG TUBING 10-PATH TRANSFERS S-PATH TRANSFERS SEAL PLATE SOUTH TEXAS PROJECT UNITS 1 & 2 BASIC FLUX-MAPPING SYSTEM Figure 7.7-9 Revision 0
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SOUTH TEXAS PROJECT UNITS 1 & 2 PROCESS SCHEMATIC FOR THE BORON CONCENTRATION MEASUREMENT SYSTEM
- Figure 7.7-10 Revision 0
JUNCTION BOX FLUSH/VENT/SAMPLE TANK FILL WATER LEVEL SWITCH 36-3/8" NEUTRON SOURCE SAMPLE IN 14---- 30" DIA. ----..
SAMPLE INLET AND OUTLET FLUSH/VENT /SAMPLE HEAT EXCHANGER NEUTRON DETECTOR SOUTH TEXAS PROJECT UNITS 1 & 2 MEASUREMENT UNIT Figure 7.7-11 Revision 0
SOURCE COVER NEOPRENE SPONGE RETAINING PADS 1/4-20 THREADED HOLE SET SCREW TO HOLD CAP TO DETECTOR TUBE w
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HIGH VOLTAGE COAX CABLE TO PRE-AMPLIFIER POLYETHYLENE RETAINER CAP POLYETHYLENE SPLIT SHIMS HIGH VOLTAGE COAX CONNECTOR VYCOR GLASS SHIM 3/4" NPT HAND TIGHTEN UNTIL CAP SPREADS SUFFICIENTLY TO CONTACT WALLS OF ANNULUS TUBE DETECTOR TUBE CAP (POLYETHYLENE)
SOUTH TEXAS PROJECT UNITS 1 & 2 SOURCE/DETECTOR ASSEMBLY Figure 7.7*12 Revision 0
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0 1,000 1,800 3,000 4,000 5,000 BORON CONCENTRATION IN PPM SOUTH TEXAS PROJECT UNITS 1 & 2 BORON CONCENTRATION MEASUREMENT SYSTEM ACCURACY CURVE OVER NORMAL OPERATING RANGE OF BORON CONCENTRATION Figure 7.7*13
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