Transcript Preliminary T/H Analyses for EFIT-MgO/Pb Reactor Design – DM1

WP1.5 Progress Meeting
KTH / Stockholm, May 22-23, 2007
EUROTRANS – DM1
Preliminary T/H Analyses
for EFIT-MgO/Pb Reactor Design
G. Bandini, P. Meloni, M. Polidori
Italian Agency for new Technologies, Energy and Environment,
Advanced Physics Technology Division
Via Martiri di Monte Sole 4, 40129 Bologna, Italy
Objectives
Support the design phases of EFIT reactor with safety
analysis at nominal and accidental conditions starting from:
development of a Neutronic/Thermal-Hydraulic coupled
model of EFIT Subcritical Reactor for PARCS v1.01
/RELAP5 3.2.2b code, just widely used in PDS-XADS
project
adaptation of the model for the new versions of the codes
to take advantage of the multigroup diffusion equation
solution in hexagonal geometry of PARCS v2.4 and the
upgrade at the RELAP5 mod3.3
EUROTRANS-DM1 – WP1.5 Progress Meeting
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EFIT Core Section
Target Unit 19 Central Positions
Active Zone Positions 180
Inner Zone
42 FA
Intermediate Zone 66 FA
Outer Zone
72 FA
Reflector Zone 252 Positions
Target
Inner Fuel
Middle Fuel
Outer Fuel
Box Dummy
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For Dummy Assemblies and
Absorber Elements
KTH - Stockholm, May 22/23 2007
Neutronic Design
EUROTRANS-DM1 – WP1.5 Progress Meeting
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RELAP5 Model of EFIT Core
Inner, Mid, Outer zones and dummy+bypass are represented
Average and hot hydraulic channel for Inner, Middle and Outer core with
equivalent flow area coupled with corresponding pin heat structures
The hydraulic channels are chocked to correctly distribute mass flowrate
Average pin, hot SA and hot pin modelled with 12 axial nodes to simulate
axial and radial power distribution
CERCER Fuel properties for Inner (57%MgO 43%MOX), Middle and Outer
(50%MgO 50%MOX) are considered
Cladding material is a ferritic-martensitic steel (T91) with aluminium coating
Gap conductivity tuned with SIM-ADS code
Lead heat transfer coefficient Subbotin correlation
EUROTRANS-DM1 – WP1.5 Progress Meeting
Nu  5.0  0.025Pe0.8
KTH - Stockholm, May 22/23 2007
RELAP5 Nodalization Scheme of EFIT Core
Lower Branch
tmpdjun
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Reflector/Bypass
Avg. Outer Zone
Hot Outer Zone
Avg. Mid Zone
Hot Mid Zone
Avg. Inner Zone
Hot Inner Zone
Upper Branch
Three Zone Core Main Parameters
Thermo-hydraulic conditions
Inner Power
Middle Power
Outer Power [MWth]
In/Mid/Out Av. Linear Power
In/Mid/Out Max. Linear Power
[W cm-1]
ERANOS
95.98
142.3  ~ 379 (5 dissipated)
140.5
Reflector+Bypass Flowrate
In/Mid/Out Mass Flowrate
Total Mass Flowrate [kg s-1]
In/Mid/Out Coolant Velocity [m s -1]
In/Mid/Out Core Pressure Drop [kPa]
94.
140.  ~ 375 (9 dissipated)
141.
151.2/142.6/129.1
193.5/185.4/187.1
T inlet
T outlet [°C]
In/Mid/Out Radial Form Factor
In/Mid/Out Axial Form Factor
MCNPX
203./177./197.
400.
480.
1.12/1.13/1.24
1.14/1.16/1.17
1.21/1.05/1.10
1.13/1.18/1.20
1200
7875/11676/11526
32296
1200
7794/11609/11692
32296
~1.0
36
AREVA
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1.5 Progress
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- Stockholm,
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22/23 2007
RELAP5 Calculations
Steady state calculation at ERANOS Code nominal conditions:
- Axial and Radial Form Factor simulated,
- 100% Power and Mass Flowrate,
- Hot Pin not simulated,
- BOC conditions.
[MW]
BOL
BOC
EOC
Pth1
95.60
95.98
95.11
Pth2
142.54
142.31
142.32
Pth3
140.73
140.48
141.27
PthTOT Pthmax1/FA Pthmax2/FA Pthmax3/FA AvePth1/FA AvePth2/FA AvePth3/FA AvePth/FA
378.88
2.49
2.37
2.39
2.28
2.16
1.95
2.10
378.77
2.57
2.43
2.43
2.29
2.16
1.95
2.10
378.70
2.58
2.48
2.47
2.26
2.16
1.96
2.10
Steady state calculation at MCNPX Code nominal conditions:
- Axial and Radial Form Factor simulated,
- 100% Power and Mass Flowrate,
- Hot Pin simulated,
- BOC conditions.
Inner zone
Intermediate zone
Outer zone
Out of fuel assemblies
Total
MWth
94
140
141
9
384
Inner zone
Mid zone
Outer zone
Max power in
assembly:
fuel+coolant+
structures
(MWth)
2.46
2.35
2.43
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Max power
in assembly:
only fuel
(MWth)
2.28
2.19
2.29
Hottest pin in
the hottest
assemblies
(only fuel)
(kW)
16.4
13.7
15.0
Axial
form
factor in
the hottest
assemblies
1.13
1.18
1.20
Hottest pin /
average pin
(inside the
hottest
assemblies)
1.21
1.05
1.10
KTH - Stockholm, May 22/23 2007
Max
linear
power
in pin
(W/cm)
203
177
197
Steady State at ERANOS Nominal Conditions
INNER ZONE
MIDDLE ZONE
OUTER ZONE
(Fax = 1.14)
(Fax =1.16)
(Fax =1.17)
Max
Temperature
(°C)
Hot FA 1/42
Fr = 1.12
Avg FA
41/42
Hot FA 1/66
Fr = 1.13
Avg FA
65/66
Hot FA 1/72
Fr = 1.24
Avg FA
71/72
Central Fuel
(*)
1251
1151
1330
1216
1285
1094
Surface Fuel
(*)
874
822
860
807
818
737
Internal clad
(**)
538
523
536
520
534
508
External clad
(**)
526
513
525
510
525
501
Lead
(**)
492
482
493
482
502
482
(*) At max linear power elevation
(**) At max core elevation
EUROTRANS-DM1 – WP1.5 Progress Meeting
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SS ERANOS Nominal Conditions – Inner Zone
Inner Core Temperature Profile (Hot SA)
1400
1251
1000
800
526
492
Fuel
Clad
Lead
600
400
200
0
0.00
0.20
0.40
0.60
Active Height (m)
0.80
1.00
Inner Core Temperature Profile (Avg. SA)
1400
1200
Temperature (°C)
Temperature (°C)
1200
1151
1000
800
513
600
482
400
Fuel
Clad
Lead
200
0
0.00
EUROTRANS-DM1 – WP1.5 Progress Meeting
0.20
0.40
0.60
Active Height (m)
0.80
KTH - Stockholm, May 22/23 2007
1.00
SS ERANOS Nominal Conditions – Mid Zone
Mid Core Temperature Profile (Hot SA)
1400
1330
1000
800
525
493
Fuel
Clad
Lead
600
400
200
0
0.00
0.20
0.40
0.60
Active Height (m)
0.80
1.00
Mid Core Temperature Profile (Avg. SA)
1400
1200
Temperature (°C)
Temperature (°C)
1200
1215
1000
800
510
600
482
400
Fuel
Clad
Lead
200
0
0.00
EUROTRANS-DM1 – WP1.5 Progress Meeting
0.20
0.40
0.60
Active Height (m)
0.80
KTH - Stockholm, May 22/23 2007
1.00
SS ERANOS Nominal Conditions – Outer Zone
Outer Core Temperature Profile (Hot SA)
1400
1285
1000
800
525
502
Fuel
Clad
Lead
600
400
200
0
0.00
0.20
0.40
0.60
Active Height (m)
0.80
1.00
Outer Core Temperature Profile (Avg. SA)
1200
1000
Temperature (°C)
Temperature (°C)
1200
1094
800
600
501
400
482
Fuel
Clad
Lead
200
0
0.00
EUROTRANS-DM1 – WP1.5 Progress Meeting
0.20
0.40
0.60
Active Height (m)
0.80
KTH - Stockholm, May 22/23 2007
1.00
RELAP5 Calculations
Steady state calculation at ERANOS Code nominal conditions:
- Axial and Radial Form Factor simulated,
- 100% Power and Mass Flowrate,
- Hot Pin not simulated,
- BOC conditions.
[MW]
BOL
BOC
EOC
Pth1
95.60
95.98
95.11
Pth2
142.54
142.31
142.32
Pth3
140.73
140.48
141.27
PthTOT Pthmax1/FA Pthmax2/FA Pthmax3/FA AvePth1/FA AvePth2/FA AvePth3/FA AvePth/FA
378.88
2.49
2.37
2.39
2.28
2.16
1.95
2.10
378.77
2.57
2.43
2.43
2.29
2.16
1.95
2.10
378.70
2.58
2.48
2.47
2.26
2.16
1.96
2.10
Steady state calculation at MCNPX Code nominal conditions:
- Axial and Radial Form Factor simulated,
- 100% Power and Mass Flowrate,
- Hot Pin simulated,
- BOC conditions.
Inner zone
Intermediate zone
Outer zone
Out of fuel assemblies
Total
MWth
94
140
141
9
384
Inner zone
Mid zone
Outer zone
Max power in
assembly:
fuel+coolant+
structures
(MWth)
2.46
2.35
2.43
EUROTRANS-DM1 – WP1.5 Progress Meeting
Max power
in assembly:
only fuel
(MWth)
2.28
2.19
2.29
Hottest pin in
the hottest
assemblies
(only fuel)
(kW)
16.4
13.7
15.0
Axial
form
factor in
the hottest
assemblies
1.13
1.18
1.20
Hottest pin /
average pin
(inside the
hottest
assemblies)
1.21
1.05
1.10
KTH - Stockholm, May 22/23 2007
Max
linear
power
in pin
(W/cm)
203
177
197
Steady State at MCNPX Nominal Conditions
(the whole Power generated in fuel pellets)
INNER ZONE
Max
Temp.
(°C)
Avg
FA
41/42
Hot FA
1/42
Hot PIN
MID ZONE
Avg
FA
65/66
ffax=1.13
ffrad=1.21
Hot FA
1/66
OUTER ZONE
Hot PIN
Avg FA
71/72
ffax=1.18
ffrad=1.05
Hot FA
1/72
Hot
PIN
ffax=1.20
ffrad=1.10
Central
Fuel(*)
1140
1209
1374
1216
1312
1364
1100
1310
1416
Surface
Fuel(*)
815
849
932
806
853
875
738
827
871
Internal
Clad(**)
524
539
550
518
532
534
508
533
537
External
Clad(**)
513
527
534
509
522
523
501
524
527
Lead(**)
481
489
481
490
481
(*) At max linear power elevation
(**) At max core elevation
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Inner Core Temperature Profile (Avg. SA)
1200
SS MCNPX
Nominal Conditions
1140
Temperature (°C)
1000
Inner Zone
800
600
513
481
400
0
0.00
0.40
0.60
Active Height (m)
0.80
1.00
1600
1400
1209
1000
800
527
489
Fuel
Clad
Lead
600
400
200
0.20
0.40
0.60
Active Height (m)
0.80
EUROTRANS-DM1 – WP1.5 Progress Meeting
1.00
Temperature (°C)
1400
1200
Temperature (°C)
0.20
Inner Core Temperature Profile (Hot PIN)
Inner Core Temperature Profile (Hot SA)
0
0.00
Fuel
Clad
Lead
200
1374
1200
1000
800
534
600
489
Fuel
Clad
Lead
400
200
0
0.00
0.20
0.40
0.60
Active Height (m)
KTH - Stockholm, May 22/23 2007
0.80
1.00
Mid Core Temperature Profile (Avg. SA)
SS MCNPX
Nominal Conditions
1400
Temperature (°C)
1200
Mid Zone
1216
1000
800
509
600
481
400
Fuel
Clad
Lead
200
0
0.00
0.20
Mid Core Temperature Profile (Hot SA)
1.00
1600
1400
1312
1000
800
522
490
Fuel
Clad
Lead
600
400
200
0.20
0.40
0.60
Active Height (m)
0.80
EUROTRANS-DM1 – WP1.5 Progress Meeting
1.00
Temperature (°C)
1200
Temperature (°C)
0.80
Mid Core Temperature Profile (Hot PIN)
1400
0
0.00
0.40
0.60
Active Height (m)
1364
1200
1000
800
523
490
Fuel
Clad
Lead
600
400
200
0
0.00
0.20
0.40
0.60
Active Height (m)
KTH - Stockholm, May 22/23 2007
0.80
1.00
Outer Core Temperature Profile (Avg. SA)
1200
SS MCNPX
Nominal Conditions
Temperature (°C)
1000
Outer Zone
1100
800
600
501
400
481
0
0.00
Outer Core Temperature Profile (Hot SA)
0.40
0.60
Active Height (m)
0.80
1.00
1600
1400
1310
1000
800
524
501
Fuel
Clad
Lead
600
400
200
0.20
0.40
0.60
Active Height (m)
0.80
EUROTRANS-DM1 – WP1.5 Progress Meeting
1.00
Temperature (°C)
1200
Temperature (°C)
0.20
Outer Core Temperature Profile (Hot PIN)
1400
0
0.00
Fuel
Clad
Lead
200
1416
1200
1000
800
527
501
Fuel
Clad
Lead
600
400
200
0
0.00
0.20
0.40
0.60
Active Height (m)
KTH - Stockholm, May 22/23 2007
0.80
1.00
Steady State at MCNPX Nominal Conditions
(in the hotpin only the Power generated in pellets)
INNER ZONE
Max
Temp.
(°C)
Avg
FA
41/42
Hot FA
1/42
Hot PIN
MID ZONE
Avg
FA
65/66
ffax=1.13
ffrad=1.21
Hot FA
1/66
OUTER ZONE
Hot PIN
ffax=1.18
ffrad=1.05
Avg FA
71/72
Hot FA
1/72
Hot
PIN
ffax=1.20
ffrad=1.10
Central
Fuel(*)
1305
1294
1344
Surface
Fuel(*)
896
845
841
Internal
Clad(**)
545
531
535
External
Clad(**)
531
521
525
Lead(**)
489
490
(*) At max linear power elevation
(**) At max core elevation
EUROTRANS-DM1 – WP1.5 Progress Meeting
KTH - Stockholm, May 22/23 2007
501