ML13322A033
| ML13322A033 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 03/31/1988 |
| From: | Motamed M Southern California Edison Co |
| To: | |
| Shared Package | |
| ML13322A032 | List: |
| References | |
| NUDOCS 8811010438 | |
| Download: ML13322A033 (46) | |
Text
RETRAN Model of SBLOCA Benchmark (Comparison with WFLASH)
SONGS 1 Approva Author March 1988
- 7 8 11438SS81026 FDR ADOCK 05000206 151 5j
APPENDIX A
THERMAL HYDRAULICS
- 1. 2&3 - T/H-82-01 Mark Sands An Introducion to the Use of VIPRE
- 3. 2 - T/H-83-02 Yine-Ping Ting Retran Analysis of SONGS 2 Low Power Natural Circulation Test
.4. 2 -
T/H-83-03 Charles Sayles MMS Analysis of SONGS 2 Loss of Feedwater Flow and Turbine Trip Transients
- 5. 2 - T/H-84-01 Yine-Ping Ting
.RETRAN Analysis of San Onofre Unit 2 Turbine Trip from 100% Power Part I: RETRAN Model, Results, and Discussions Part II:
RETRAN Plant Control Systems Modeling
- 6. 2&3 - T/H-84-02 Yine-Ping Ting Special RETRAN Studies Performed in Conjunction with the SONGS 2 100%
Turbine Trip Analysis
- 7. 2&3-T/H-84-03 Glenn A. Ducat Startup: A CLIST For Processing SU Computer Data
- 9. 2&3-T/H-85-01 Yine P. Ting RETRAN Analysis of San Onofre Units 2/3 Steam Generator Tube Rupture
THERMAL HYDRAULICS (Cont.)
- 11. 2&3-T/H-85-03 Yine P. Ting Thermal Hydraulic Analysis.of SONGS 2/3 Spent Fuel Storage Rack
- 12. 2&3-T/H-8.5-04 Yine P. Ting A Status Review of SONGS 2/3 RETRANO2 Model Development
- 13. 2&3-T/H-85-05 Henri J. Fenech Fuel Failure Prediction by the Convolution Method
- 14. 2&3-T/H-85-06 Yine P. Ting RETRAN Analysis of SONGS 2/3 Total Loss of Forced Circulation at *Full Power
- 15. 2 -
T/H-85-07 Yine P. Ting Determination of SONGS 2 RCS Flowrate with VIPRE Code
. 16. 1 - T/H-86-01 Yine P. Ting RETRAN Analysis of SONGS 1 11/21/85 Water Hammer Event
- 17. 2 -
T/H-86-02 Yine P. Ting RETRAN Analysis of SONGS 2 Double-ended Steam Line Break at Full Power
- 18. 1 :- _T/H-86-03 Majid Motamed (0519j)
Time to Boil-Off Steam Generator Following a Total Loss of Feedwater SONGS 1
- 19. 2 -
T/H-87-01 Majid Motamed (0852j)
Time to Boil-Off Steam Generator Following:
- 1. Total Loss of Feedwater (TLOFW)
- 2. TLOFW and Station Blackout SONGS 2
- 20. 2&3-T/H-87-02 Majid Motamed (0879j)
Methodology and Analysis of LPSI Fluid Flow Under Seismic Acceleration SONGS 2/3
- 21. 1 -
T/H-87-03 Yine P. Ting RETRAN Analysis of SONGS 1 LONF Event with a Concurrent Loss of Steam Flow/
Feed Flow Mismatch Reactor Trip
THERMAL HYDRAULICS (Cont.)
- 22.
1 -
T/H-87-04 Yine P. Ting RETRAN Analysis of SONGS 1 Loss of
- 23.
243-T/H-88-01 Yine P. Ting RETRAN'Analysis of SONGS 2/3 Unconttolled CEA Withdrawal from Subcritical Conditions with a Complete Closure of ADVs
- 24.
1-T/H-88-02 Majid Motamed RETRAN SBLOCA Model Benchmark (Comparison with WFLASH)
SONGS 1
- 25.
1-T/H-88-03 Majid Motamed
'Evaluation of An Improved Safety Injection'System using RETRAN-02/Mod 4 SONGS 1
TABLE OF CONTENTS SECTION PAGE
- 1. Abstract.......................................
1
- 2. Introduction
........................................ 2
- 3.
(RETRAN Model........
3
- 4. Results 6
- 5. Conclusions
......................................... 7
- 6. References.............................................
.8 9
- 7. Figures................................................
9
- 8. Appendix.......................................... 39 TABLE PAGE
- 1. Assumptions and Initial Conditions for RETRAN Model 5
APPENDIX PAGE RETRAN-02/Mod 4 Input Listing for SONGS 1 SBLOCA Model 39 S
FIGURES
- 1. SONGS 1 RETRAN Nodal Diagram
- 2. Loop Seal
- 3. SONGS 1 Existing Safety Injection Flow Used in SBLOCA One Line Spilling. One Line Blocked, and One Line Injecting
- 6.
SONGS 1 SBLOCA 6 Inch Break Pressurizer Level
- 8.
SONGS 1 SBLOCA Existing SI System 6 Inch Break Upper Head Mixture Level
- 9. *SONGS 1' SBLOCA Existing. SI System 6 Inch Break Steam Generator Pressure Break Loop
- 10.
SONGS 1 SBLOCA Existing SI System 6 Inch Break Mixture Level from Top of Active Core
- 11.
SONGS 1 SBLOCA Existing SI System 6 Inch Break Loop Seal Mixture Level
- 12.
SONGS 1 SBLOCA Existing SI System 6 Inch Break Break Mass Flow Rate
- 13.
SONGS 1 SBLOCA Existing SI System 6 Inch Break SI Mass Flow Rate
- 15.
SONGS 1 SBLOCA 6 Inch Break Cold Leg Temperature
- 16.
SONGS 1 SBLOCA 6 Inch Break Hot Leg Temperature
- 17.
SONGS 1 SBLOCA Existing SI System 4 Inch Break Pressurizer Pressure
- 21.
SONGS 1 SBLOCA Existing SI System 4 Inch Break SI Mass Flow Rate
- 1. ABSTRACT The current Safety Injection System at SONGS 1 depends on the operation of a number of hydraulically actuated valves. It is of i.nterest to improve this system and increase its reliability. The RETRAN model of SONGS 1 was chosen to simulate a Small Break LOCA (SBLOCA) to evaluate the upgraded Safety Injection (SI) system. This model needed to be validated prior to the evaluation of the upgraded system. This report describes the validation effort.
The RETRAN base model of SONGS 1 has been modified to simulate a SBLOCA for the existing SI system. The RETRAN model was benchmarked by comparing its results with Westinghouse's results for the SBLOCA simulation performed with the WFLASH code. The break sizes considered were: 3, 4, and 6 inch diameter breaks at the cold leg nozzle of Loop B. In each case the transient was simulated beyond the time of the clearing loop.seal and core uncovery/recovery.
RETRAN results were in excellent agreement with those of WFLASH (1) for the same break sizes.
The evaluation of the upgraded SI system is discussed in a separate document (2).
- k
- 2. INTRODUCTION The Safety Injection System at SONGS 1 is different.from most other PWR's, since it uses the Feedwater pumps. Upon receiving a Safety Injection Signal (SIS), the feedwater pumps are realigned to take suction from the SI pumps and discharge to the.RCS. This involves automatic action of several hydraulically actuated valves. It is of interest to improve the SI system and reduce its reliance on the operation of these valves. Several upgrade options were considered and needed evaluation.
The RETRAN model of SONGS 1 was chosen to evaluate one of the upgrade options for the system response during a SBLOCA.
However, before this evaluation is conducted, the RETRAN base model of SONGS 1 was modified and the detailed geometry of the loop-seals were included in the model, and a RETRAN m6del of SONGS 1 for SBLOCA was developed.
This model was then validated in the following manner. The currently existing SI system was included in THE RETRAN model and break sizes of 3, 4, and 6 inches were simulated.
RETRAN simulation of SBLOCA for these break sizes was compared with the results of the WFLASH simulation performed by Westinghouse (1) for the same break sizes. The evaluation of the SI upgrade is discussed in Reference 2.
- 3.
RETRAN MODEL The RETRAN model of SONGS 1 used to simulate a cold leg SBLOCA consists of 48 control volumes and 78 junctions. Figure 1 shows a nodal diagram of the model. Primary loops A and C are combined into an equivalent loop (right),
and loop B with the cold leg break is modeled as a separate loop. The detailed geometry and the elevations of the loop seal including the lower elevation crossover leg was included in the model, since the loop seal clearing process was of interest in this analysis. Figure (2) shows the loop seal.
Table 1 states the steady state initial conditions and the important assumptions made in this simulation. The break sizes of 3, 4, and 6-inches cause voiding of large sections of the primary system.
The loop flow becomes stagnant, and many volumes such as the reactor vessel upperhead and the pressurizer become completely voided of liquid. A bubble rise model was extensively used in the primary system to represent voiding of a large section of RCS under fairly stagnant flow conditions.
Volumes were overlapped to allow mixture level crossing the boundaries without causing numerical instability. A detailed model of the steam generator including steam separator and recirculation was used to accurately represent the distribution of coolant in the secondary system.
The safety injection flow is based on the assumption that one SI train is functioning with one line injecting, one line spilling and one line blocked. Figure (3) shows the SI flow vs RCS pressure.
This is the same SI flow model used in WFLASH. The upperhead is conservatively assumed to be initially at the same temperature as the upper plenum. A pressurizer non equilibrium model is used in this analysis.
Control systems such as pressurizer pressure and level, and steam dump/bypass controls are assumed to be inoperable. The reactor is assumed to trip on the low pressurizer pressure SIS of 1750 PSIA with a one second delay. The turbine, feedwater pumps, and reactor coolant pumps are also assumed to trip on the same signal.
Safety injection flow is assumed to reach the RCS 20
.seconds after SI actuation. Steam safety valves are assumed operable.
The auxiliary feedwater system is assumed to be manually turned on with a 10 minute delay.
Table 1 Assumptions and Initial Conditions for RETRAN model
- 1. Initial power:
100% (1347 MWt)
- 2. Break occurs at the cold leg nozzle, loop B cold leg, discharge side of the pump.
- 3. Reactor trip on low pressure SI of 1750 psia with one second delay.
- 5. Turbine trip on reactor trip signal.
- 7. Auxiliary feedwater is manually actuated with 10 minutes delay.
- 8. Pressurizer level, hot leg and cold leg temperatures were chosen to match those used in WFLASH. (See Figures.)
- 9. Extended Henrey Fauske critical flow model was used for subcooled break flow, with a discharge coefficient of 1.
- 10. Moody's critical flow model was used for saturated break flow with a discharge coefficient of 1.
- 11.
All control systems, especially the steam dump/bypass control system are inoperable.
- 12.
SI flow enters RCS with 20 second delay after SIS actuation.
- 13. One SI train is operating with one line injecting, one line spilling, and one line blocked.
- 4.
RESULTS Three cold leg break sizes were simulated by RETRAN, and important parameters were compared with WFLASH results given in Reference (1).
The RETRAN results for the six inch break is compared in detail with WFLASH.
Figures 4 through 16 provide the results for the 6 inch break. Results show excellent agreement between RETRAN and WFLASH. Figures 17 to 21 provide the results for a 4 inch cold leg break, and Figures 22 to'26 are for the 3 inch break. In the cases of 4 inch and 3 inch breaks, RETRAN results are slightly more conservative since they indicate an earlier and deeper core uncovery. A sensitivity analysis was performed to determine the reason for the difference between RETRAN and WFLASH results. It was determined that the critical flow correlations used in WFLASH were different from that of RETRAN, and that this difference made RETRAN results slightly more conservative. The RETRAN simulation of SBLOCA for all three break sizes was continued beyond the loop seal clearing, core.uncovery, core recovery, and beyond the point in time where SI flow exceeded'the mass flow rate through the break.
- 5.
CONCLUSION The RETRAN model of the SONGS 1 SBLOCA was verified by comparing its results to the results of the SBLOCA simulation performed by Westinghouse for SONGS 1 using the WFLASH code. The break sizes of 6, 4, and 3 inches diameter were simulated. Break location was at the cold leg nozzle of Loop B. The results of RETRAN were in excellent agreement with those of WFLASH. Where results were slightly different, RETRAN results were more conservative since they predicted slightly earlier and deeper core uncovery. A sensitivity analysis was performed and it was determined that the reason for the small differences in RETRAN and WFLASH results was due to the difference in break flow models used in the two codes.
It is concluded that the RETRAN model'of the SONGS 1 SBLOCA is successfully benchmarked against the WFLASH code for the range of breaksizes of interest, and can simulate a cold leg SBLOCA with acceptable accuracy.
- 6. REFERENCES
- 1.
Study of Small Loss of Coolant Accidents for the San Onofre Nuclear Generating Station Unit 1, February 29, 1980, J. Greshan, Westinghouse Electric Corporation
- 2.
Evaluation of An Improved Safety Injection System, Using RETRAN-02/MOD 4, SONGS 1, 1-T/H-88-03, M. Motamed 151 5j FIGURES 9r
9S 10 C.&
Log Jkc fio a
Figure 1 SONGS 1 RETRAN Nodal Diagram
PUMP ISCHA RGE STEAM
/
GENERATOR
-SUCTION Figure 2 Loop Seal
RCS PRESSURE (PSIA) 00 0
0 0
0 o
- 00.
0 0
0 0
0 0
0 r,
-0 z
-b m
o a
0 I-Z o
z Co Cy U) 0 0
m 0
Z
- Orn, a
ZZ 20 W
>CD I s i sl l
l WO Oo-I a
m 0
- 0.
-b z
e
/
Plots for 6 Inch Cold Leg Break 9
(
S
0IIIII Figure 4 SONGS 1 SBLOCA EXISTING SI SYSTEM 6 INCH BREAK RX NORMALIZED POWER 1.000 0.900
-0.600 S0.700 1 0.600
-0,500 0.400 S0.300
-0,200 00100 0.000 0
20 40 60 80 100 120 140 160 180 200 TIME (SEC)
Figure 5 SONGS 1 SBLOCA EXISTING SIFSYSTEM 6 INCH BREAK PRESSURIZER PRESSURE 2200 2000 1800 q 1600 CL1400 w
1200 n
1000 C/3 (f
800
- a.
600 400 200 0
20 40 60 80 100 120 140 160 180 200 TIME (SEC)
RETRAN
?s00.cat SM."
ANALYsIS sts
..u.
?000.0 t0o.0 1000.0 t*03. 00 0.0 IIII rra Tim( <$(CI WFLASH
Figure 6 SONGS1 SBLOCA 6 INCH BREAK PRESSURIZER LEVEL 50 40
-30 I.J 30 0
50 100 150 200 250 300 TIME (SEC)
RETRAN 60.000 Sc( SMALL. *(AI AWAL"SI5 Six I11Mn gA 50.000putSSualf(R MIuITM
- Lvit ir?,
-50.000 4 0.000 30,000 t0.000 IIof 0.0 M
IM(
SE(C)
WFLASH
Figure 7 SONGS 1 SBLOCA EXISTING SI SYSTEM 6 INCH BREAK RX VESSEL DOWN COMER MIXTURE LEVEL 25 20 15 W 10
- E 5
0 20 40 60 80 100 120 140 160 180 200 TIME (SEC)
RETRAN 40.000 SC SMALL antAK A ALYSIS 0
ic (It t
tu t(LI L tfTl IS000
- - ?0.000 10.000 5j.000 0.0 TIM( (s(Cl WFLASH
Figure 8 SONGS 1 SBLOCA EXISTING-SI -SYSTEM 6 INCH BREAK UPPER HEAD MIXTURTE LEVEL 7
4 5
-J 1
0 20 40 60 80 100 120 140 160 150 200 TIME (SEC)
RETRAN t0.000 5{
SMALL B AA ANIALYSIS
$15 19MCM BR(At UPP[R,4(AO Miu(
LEV(L ITI p.0000
.0000
- .0000 1.0000 sTIM S
(
S W F DFA~
14
Figure 9 SONGS 1 SBLOCA EXISTING SI SYSTEM 6 INCH BREAK STEAM GENERATOR PRESSURE BREAK LOOP 1200 1000 U)
-0 800 gn 600 400 0
20 40 60 80 100 120 140 160 180 200 TIME (SEC)
RETRAN 1300.0 SC( SMALL BA(AK ANALYSIS sl 1I1C
- Ga( AK 5tH. CI.
$(CONIAAy PRESSURE (PSIA)
?000.0 a1100.0 1000.0 502.00 0.0 S
TIM(
M(CI WFLASH
Figure 10 SONGS 1 SBLOCA EXISTING SI SYSTEM 6 INCH BREAK MIXTURE LEVEL FROM TOP OF ACTIVE CORE 10
=
l
=
~-
l l
8 6
Ld L-4 2
0A Tce oF cAse,
-2
-- 8
-8 0
20 40 60 80 100 120 140 160 180 200 TIME (SEC)
RETRAN
?0.000 SCf SMALL (R( AK ASALYSIS SgI IM BR(AR coN
"""UN I AKiIr 11.500 13.000 t
H?.300 10.000 a1.5c00 4.0000
?.5000 0.0 instat CWA 1I"t (StC)
WFLASH
Figure 11 SONGS 1 SBLOCA EXISTING SI SYSTEM 6 INCH BREAK LOOP SEAL MIXTURE LEVEL 18 16 14 G-12 W10 8
6 TOP OF CROSS OVER LEG 2
0[
0 20 40 60 80 100 120 140 160 180 200 TIME (SEC)
RETRAN
?~.OOOSC(
SMALL 64(AK ANALYSI Sis INCH GREAK Loop s (At Matluf(
L(v(L (rTI I'
OOO 0.000 5.0000 tIm(
IS(CI WFLASH
Figure 12 SONGS 1 SBLOCA EXISTING SLSYSTEM 6 INCH BREAK BREAK MASS FLOW RATE 4000 O'
3600 3200 m
2800
-J 2400 2000 1600 0
i.L 1200 M
400 0
.Is
~
I, 0
20 40 60 80 100 120 140 160 180 200 TIME (SEC)
RETRAN SCE SN 8A (AEK ANALYS I
Si 1CM SO( AK gt(AA MASS rtOwAT( (L/S(Cs 000.0 x ?000.0 1050.0 n
0.0 8
8 TIM( I!(CI*
WFLASH
FIGURE 13 SONGS 1 SBLOCA EXISTING' SSYSTEM 6 INCH BREAK SI MASS FLOW RATE 1000 (U3 800
-J 600 La.1 400 0
200 0
0 20 40 80 80 100 120 140 160 180 200 TIME (SEC)
RETRAN III IA L
OMA ILAAYI
,oo. 00 SA _Y
%C___ A! LRT QIS 700.00 f.00.00 100.00 No0.00 M0.00 0.0 I__
ril"[ M~CI W FLASH-
Figure SONGS 1 SBLOCA EXISTING SI SYSTEM 6 INCH BREAK BREAK FLOW AND SI FLOW 4000 3600 :--
BREAK FLOW SI FLOW 3200-*
2800 2400 2000 1600 1200 800 400..
0 20 40 60 80 100 120 140 160 180 200 TIME (SEC)
FIGURE 15 SONGS1 SBLOCA 6 INCH BREAK COLD LEG TEMPERATURE 700 C~ 600 500 4
400 L
300 200 0
50 100 150 200 250 300 TIME (SEC)
RETRAN too.00
$CE SMALL A[A t ANtALYSIS
$15 INC.. GR[AK COLO tIC flulO t(0MP(RAATU if4 600.00 300.00
.00.00 300.00 TIM! COCCI WFLASH
Figure 16 SONGS1 SBLOCA 6 INCH BREAK HOT LEG TEMPERATURE 7 00 600 0
%-10 500 L
S300 200 0
50 100 150 200 200 300 TIME (SEC)
RETRAN
'00.00 SC( SMALL GREAK ANALYSIS SIs 116CM G(AK
.OT L(C FLUI T(MP(IATURE (t oo.00 400.00 p00.00 SI I
TIt S(C)
WFLASH
- e.
C Plots for 4 Inch Cold Leg Break
(
S
Figure 17 SONGS 1 SBLOCA EXISTING.SILSYSTEM 4 INCH BREAK PRESSURIZER PRESSURE 2500 2000 V)
IL 1500 2 1000~
500 0
0 50 100 150 200 250 300 TIME (SEC)
RETRAN
$C( SMAt 8 00( AK ANALYSIS FOUR INC" BRt 49 RE5 PR($SUALt.*lAl
?000.0 1500.0 S1000.0 500.00._________
0.0 ill.
TIME IS(C WFLASH
Figure 18 SONGS 1 SBLOCA WITH EXISTIG SI SYSTEM 4 INCH BREAK I
MIXTURE LEVEL FROM TOP OF ACTIVE CORE a
8 TOP OF CORE 0
-2
-8
-10 I.
0 50 100 150 200 250 800 TIME (SEC)
RETRAN
?0.000 SCE S ALt BREAK ANALYSIS FOUR INCm GR(A.
COME MIstuR( LEvtt InT 1p.300 10.000, t.00 5.0000 9
?~~.3000 0.0 8
S a
a a
TIME I( CI WFLASH
FIGURE 19 SONGS 1 SBLOCA EXISTING SI SYSTEM 4 INCH BREAK LOOP SEAL MIXTURE LEVEL 25 20 15 10 2
5 TOP OF CROSSOVER LEG 0
0 50 100 150 200 250 300 TIME (SEC)
RETRAN
?5.000 SC SMALL BREAK ANALYSIS fQOU INCH GALKA LOOP SEAL MIlTURE LEVEL ITTi 10.000 5.0000-0.0 TINE (I[(
I If"I A t lI
Figure 20 SONGS 1 SBLOCA EXISTING SILSYSTEM 4 INCH BREAK BREAK FLOW AND SI FLOW 2500 BREAK FLOW w
-SI FLOW Cn 2000 m
%-f 1500 1000 00 O
50 100 150 200 250 300 TIME (SEC)
RETRAN S{( SMALL 80( AA ANALYSIS FOUR INC
(
M AK GR(AK MASS r OssA.,
4t9/SC(
-- 1500.0 2000.0 tooo.o-soo.oo 9 <
- ~~0.00~
8 8
8 8
8
- 2.
TIM(
0(CI WFLASH
Figure 21 SONGS 1 SBLOCA EXISTING SI SYSTEM 4 INCH BREAK SI MASS FLOW RATE 1000 0
-j 500 0
0 50 100 150 200 250 300 TIME (SEC)
RETRAN
!C3C.0 Sff SMAIL Rt A4 A46ALrSIS Ioull INiCH BREAK4 SAC(fTV I%0(C1 10% MA$$ ftOvaAT( ILGIS(Cl f00.00 200O.00 400.00
?00.00 300.00 100.00 0.0 TIME $(CI WFLASH
Plots for 3 Inch Cold Leg Break (e
Figure 22 SONGS 1 SBLOCA EXISTING SI SYSTEM 3 INCH BREAK PRESSURIZER PRESSURE 2500 2000 V) 6 1500 w
m 1000 w
CL 500 0
50 100 150 200 250 300 350 400 TIME (SEC)
RETRAN SC( SMALL BREAK ANALYSIS Hat( INCh. COLD L(C GR(AE ACS PRESSUA(tPSIA) 1000.0 1300 0.0
-u___n a
I I
TIM(
$(CI WFLASH
Figure 23 SONGS 1 SBLOCA WITH EXISTING SI SYSTEM 3 INCH BREAK MIXTURE LEVEL FROM TOP OF ACTIVE CORE 10....
4 ToP OF CORE.
.0
-2
-4
-6
-8 0
50 100 150 200 250 800 850 400 Time, seconds RETRAN 20.000 SE( SM4ALL BREAK ANALYSIS 1" a1(
INCH COLD L(C GREAlt CORE M fu al t rv EL MlT 15.000 11.500 10.000 I.woo 5.0000 1.000 0.0 fli ISI
Figure 24 SONGS 1 SBLOCA EXISTING SI. SYSTEM 3 INCH BREAK LOOP SEAL MIXTURE LEVEL 25.......
20
.J 1
15 10 25 0
50 100 150 200 250 300 350 400 TIME (SEC)
RETRAN SCE SMALL BRE(A ANALYSIS TmA(( INCH COLO L(C SREAR LOOP 5(AL MIXTURE L(VEL fFTl 15.000 3.0000____
0.0 r-fra-I TI IM CI WFLASH
Figure 25 SONGS 1 SBLOCA EXISTING SI SYSTEM 3 INCH BREAK BREAK FLOW AND SI FLOW 1500 I.
BREAK FLOW
-SI FLOW Lzj in m 1000
.J 00
-J500 0
50 100 150 200 250 300 350 400 TIME (SEC)
RETRAN SU SMALL BREAK ANALYSIS TaR(
INCO COLO LEC WR(AR BR(AK MASS fLOvaATE ILS/SECI 1730.0 1300.0 0no.0 t ooo.o~
00.00 U
I S
Figure 26 SONGS 1 SBLOCA EXISTINGSI SYSTEM 3 INCH BREAK SI MASS FLOW RATE 500..
w 400 300 3:200.
O
-j LL cn 100 0
50 100 150 200 250 300 350 400 TIME (SEC)
RETRAN SMALL BA(
ANAL YSIS TatC IIICi. COLO L(C BREAK SAFETY INU(CTION MASS ftOtAAT( ILB/!(Cl 00 I........
700.00 400.00 300.00 100.00 0.0 02 SilMt ($SCI WFLASH
APPENDIX B