ML16207A683
Text
UFSAR Section 6.3
STPEGS UFSAR UFSAR FIGURE 6.3-1 Reference Drawing(s) SN129F05013#1 SN129FOS013#2 Revision 5
STPEGS UFSAR UFSAR FIGURE 6.3*2 Reference Drawing(s) SN129F05014#1 SN129F05014#2 Revision 5
STPEGS UFSAR UFSAR FIGURE 6.3-3 Reference Drawing(s) SN129F05015#1 SN129FOS015#2 Revision 5
STPEGS UFSAR UFSAR FIGURE 6.3-4 Reference Drawing(s) SN129FOS016#1 SN129F05016#2 Revision 5
NOTE
- 1.
THIS DIAGRAM IS A SIMPLICATION OF THE SYSTEMS INTENDED TO FACILAH THE UNDERSTANDING OF THE PROCESS.
FOR DETAILS OF THE PIPING VALVES INSTRUMENTATION ETC. REFER TO THE ENGINEERING FLOW DIAGRAM. REFER TO PROCESS FLOW DIAGRAM TABLES FOR THE CONDITIONS AT EACH NUMBERED POINT.
- 2.
THE CCS CCW FLOW TO THE SAFETY *iNJECTION PUMPS IS NOT APPLICABLE TO STP.
---8 SOUTH TEXAS PROJECT UNITS 1 & 2 EMERGENCY CORE COOLING SYSTEM PROCESS FLOW DIAGRAM Figure 6.3-5 Revision 0
STPEGS UFSAR Revision 18 NOTES TO FIGURE 6.3-5 (Sheet 1 of 8)
The system operating conditions presented for both the injection and the recirculation modes are based on the assumption that the Reactor Coolant System and the Containment are in equilibrium at zero psid. The performance reported for the pumping system assumes the accumulators are fully discharged and depressurized to zero psid. An estimate of the Containment spray pump flow is included in the process conditions presented for the suction piping from the refueling water storage tank and the Containment sump, since these lines are shared by the Containment Spray System.
The residual heat removal pumps shown on the process flow diagram are not used for safety injection. The process conditions associated with Residual Heat Removal System operation (location numbers 100 through 110) are presented in the notes to Figure 5.4-7.
MODES OF OPERATION Mode A: Injection Phases The low head and high head safety injection pumps take suction from the refueling water storage tank and deliver coolant into the reactor through the cold leg connections. This mode of operation is also representative of the flow verification testing that is performed on the system prior to initial plant startup (the system parameters listed are the expected values, not the minimum acceptable values).
Mode B: Cold Leg Recirculation The low head and high head safety injection pumps take suction from the containment sump and deliver coolant into the reactor through the cold leg connections. The process conditions are based on the following assumptions:
- 1.
The water in the refueling water storage tank has been injected and all three subsystems have realigned to take suction from the Containment sump.
- 2.
The sump water is at saturation conditions.
Mode C: Hot Leg Recirculation Same as Mode B except the delivery path to the reactor is through the Reactor Coolant System hot leg condition. It should be noted, however, that only two subsystems will be transferred while maintaining the third subsystem in Mode B.
STPEGS UFSAR Revision 18 NOTES TO FIGURE 6.3-5 (Sheet 2 of 8)
VALVE ALIGNMENT CHART Mode of Operation Valve Number A
B C
1 O
C C
2 O
C C
3 O
C C
4 C
O O
5 C
C O (C) 6 C
C O (C) 7 O
O C (O) 8 O
O C (O)
Train C valve alignments are given in parenthesis O =
valve fully open C =
valve fully closed
STPEGS UFSAR Revision 18 NOTES TO FIGURE 6.3-5 (Sheet 3 of 8)
MODE A INJECTION PHASE (RUNOUT CONDITIONS FOLLOWING ACCUMULATOR DELIVERY)
Pressure Temperature Flow Location*
Fluid psig (Max.) °F gal/min(1) 1b/sec Volume gal 1
Refueling Water Atmospheric 100 350,000 Minimum 2
100 21,900 3,021 3
100 14,600 2,014 4
4 psia 100 7,300 1,007 5
3 psia 100 2,800(2) 386 6
3 psia 100 1,600 221 7
3 psia 100 2,900 400 8
430 100 1,600 221 9
80 100 1,600 221 10 172 100 2,900 400 11 72 100 2,900 400 12
<15 100 20 2.8 13
<15 100 100 13.8 14
<15 100 120 16.6 15
<15 100 220 30.4 16
<15 100 240 33.2 17
<15 100 340 47 18
<15 100 360 49.8 19 Recirc.
Coolant Containment Pressure Containment Temperature 0
0 Location numbers 100 on the process flow diagram are used for RHR loop operation.
- 1.
At reference conditions 100°F and zero psig.
- 2.
Containment spray flows listed represent a conservative estimate of maximum allowable pump runout flow.
STPEGS UFSAR Revision 18 NOTES TO FIGURE 6.3-5 (Sheet 4 of 8)
MODE A INJECTION PHASE (RUNOUT CONDITIONS FOLLOWING ACCUMULATOR DELIVERY)
Pressure Temperature Flow Location*
Fluid psig (Max.) °F gal/min(1) 1b/sec Volume gal 20 Refueling Water
<21 100 2,800 386 21 Refueling Water
<21 100 1,580 218 22 Refueling Water 0
100 0
0 23 Refueling Water 0
100 0
0 24 Refueling Water 0
100 0
0 25 Refueling Water 0
100 4,380 604 26 N2 0
100 0
0 27 N2 0
100 0
0 28 N2 0
100 0
0 29 Recirc.
Coolant Containment Pressure Containment Temperature 30 Refueling Water 10 psia 100 2,900 400 31 Refueling Water 10 psia 100 1,600 221 32 Refueling Water 4 psia 100 2,900 400 33 Refueling 4 psia 100 4,500 621 Location numbers 100 on the process flow diagram are used for RHR loop operation.
- 1.
At reference conditions 100°F and zero psig.
STPEGS UFSAR Revision 18 NOTES TO FIGURE 6.3-5 (Sheet 5 of 8)
MODE B COLD LEG RECIRCULATION Pressure Temperature Flow Location*
Fluid psig (Max.) °F gal/min(1) 1b/sec Volume gal 1
Refueling Water Atmospheric 100
<5,000 2
Note 1 100 0
0 3
Note 1 100 0
0 4
Recirc.
Coolant 1.5 212 0
0 5
0.5 212 2,800 373 6
0.5 212 1,600 213 7
0.5 212 2,900 386 8
415 212 1,600 213 9
65 212 1,600 213 10 165 212 2,900 386 11 65 212 2,900 386 12 65 212 0
0 13 65 212 0
0 14 Refueling Water 100 0
0 15 100 0
0 16 100 0
0 17 100 0
0 18 100 0
0 19 Recirc.
212 7,300 972 Location numbers 100 on the process flow diagram are used for RHR loop operation.
- 1.
At reference conditions 212°F and zero psig.
STPEGS UFSAR Revision 18 NOTES TO FIGURE 6.3-5 (Sheet 6 of 8)
MODE B COLD LEG RECIRCULATION Pressure Temperature Flow Location*
Fluid psig (Max.) °F gal/min(1) 1b/sec Volume gal 20 Recirc.
Coolant
<22 150 2,900 386 21
<22 212 1,600 213 22 Refuelin g Water 100 0
0 23 100 0
0 24 100 0
0 25 Recirc.
Coolant 0
172 4,500 599 26 N2 0
Ambient 0
0 27 0
Ambient 0
0 28 0
Ambient 0
0 29 Recirc.
Coolant Containment Pressure 212 350,00 30 7
212 2,900 386 31 7
212 1,600 213 32 1.5 212 4,400 586 33 1.5 212 2,800 373 Location numbers 100 on the process flow diagram are used for RHR loop operation.
- 1.
At reference conditions 212°F and zero psig.
STPEGS UFSAR Revision 18 NOTES TO FIGURE 6.3-5 (Sheet 7 of 8)
MODE C HOT LEG RECIRCULATION (SUBSYSTEM A & B)**
Pressure Temperature Flow Location*
Fluid psig (Max.) °F gal/min(1) 1b/sec Volume gal 1
Refueling Water Atmospheric 100
<5,000 2
100 0
0 3
100 0
0 4
Recirc.
Coolant 1.5 212 0
0 5
0.5 212 2,800 373 6
0.5 212 1,600 213 7
0.5 212 2,900 386 8
415 212 1,600 213 9
65 212 1,600 213 10 165 212 2,900 386 11 65 212 2900 386 12 65 212 0
0 13 65 212 0
0 14 Refueling Water 100 0
0 15 100 0
0 16 100 0
0 17 100 0
0 18 100 0
0 Location numbers 100 on the process flow diagram are used for RHR loop operation.
The process conditions listed describe the hot leg recirculation for subsystems A & B. Subsystem C continues to operate in the cold leg recirculation mode.
- 1.
At reference condition 212°F and zero psig.
STPEGS UFSAR Revision 18 NOTES TO FIGURE 6.3-5 (Sheet 8 of 8)
MODE C HOT LEG RECIRCULATION (SUBSYSTEM A & B)**
Pressure Temperature Flow Location*
Fluid psig (Max.) °F gal/min(1) 1b/sec Volume gal 19 Recirc.
Coolant 212 7,300 972 20
>150 0
0 21
<212 0
0 22
<54 150 2,900 386 23
<54 212 1,600 213 24 0
172 4,500 599 25 0
>172 0
0 26 N2 0
Ambient 0
0 27 N2 0
Ambient 0
0 28 N2 0
Ambient 0
0 29 Recirc.
Coolant Containment Pressure 212 350,000 30 7
212 2,900 386 31 7
212 1,600 213 32 1.5 212 4,400 586 33 1.5 212 2,800 373 Location numbers 100 on the process flow diagram re used for RHR loop operation.
The process conditions listed describe the hot leg recirculation for subsystems A & B. Subsystem C continues to operate in the cold leg recirculation mode.
- 1.
At reference conditions 212°F and zero psig.
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w w
!to c
<2:
w
- z::
c w
- a.
0
...J w >
w c 800 r-----------------------------------------------------~
700 600 500 400 300 200 100 0
400 PUMP PERFORMANCE CURVE USED FOR ACCIDENT ANALYSES 800 1200 1600 ACTUAL PUMP PERFORMANCE CURVE 2000 2400 2800 3200 FLOW (GPM)
SOUTH TEXAS PROJECT UNI*TS 1 & 2
. LOW HEAD Sl PUMP PERFORMANCE ClRVES Fi ure 6.3-6 Revision 0
4000.---------------------------------------------------~
3500 3000 i=
~ 2500 0
~
w
- c c 2000 w
a..
0
...J w >
~ 1500 1000 500 0
PUMP PERFORMANCE________...
CURVE USED FOR ACCIDENT ANALYSES ACTUAL PUMP PERFORMANCE CURVE 200 400 600 800.
1 000 1200 1400 1600 FLOW (GPM)
SOUTH TEXAS PROJECT UNITS 1 & 2 HIGH HEAD Sl PUMP PERFORMANCE CURVE Figure 6.3-7 Revision 0
- 13. 0' L
43.1~~~
42.1-~- --TANK OVERFLOW 550.000 GAL.
- 40. q'-- ---HI ALARM ------1---528.000 GAL.
37.6~--
---LO ALARM-------I-- 473.01210 GAL.
!TOTAL VOLUME*550.000 GALl 360.000 GAL.
14.4 1
12.0'
~
- 11. 9' 1
11.0 I
---+---....- LO - LO ALARM 75,000 GAL.-
'£_
OUTLET NOZZLE
~ }- ( 12, 000 GAL. l
- ---1-----!---+- VORTEX BREAKER
't
- ...__-+---+--+-
EMPTY ALARM 32,000 GAL. -
~--+-_._____.___ LEVEL I NST. CONNECT I ON~I' 10.0-'-
It tiQIE.S 1 l ELEVATIONS REFERENCED TO SEA LEVEL.
2> THE VALUES SHOWN ABOVE INCLUDE INSTRUMENT UNCERTAINTY WITH THE EXCEPTION OF 360.000 GAL. AND 12.000 GAL. WHICH REPRESENT MINIMUM REQUIRED VALUES.
-22 o 1 I J-t LHSI PUMP NOZZLE
-37 o 1 I t
1ST STAGE IMPELLER LHSI PUMP SOUTH TEXAS PROJECT UNITS 1 & 2 RWST LEVEL SETPOINTS FIGURE 6.3-8 REVISION
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