Transcript ADS Key Issues for Transmutation Purposes

FI6W-CT-2004-516520: Integrated Project on European Transmutation (EUROTRANS)
EUROTRANS DM1 Safety Meeting
27-28 November, 2008
FZK , RFA
Safety coefficients and sub-criticality levels
EFIT and XT-ADS
Gérald Rimpault,
Commissariat à l’Energie Atomique (CEA) Cadarache Center
[email protected]
CEA/DEN/DER Gérald Rimpault
EUROTRANS DM1 Safety Meeting, 27-28 November, 2008, FZK, RFA
1
FI6W-CT-2004-516520: Integrated Project on European Transmutation (EUROTRANS)
He-EFIT Core Neutronic characteristics (25/11/08)
Results with ERANOS2.1 using JEFF3.1
Gérald Rimpault, Julian Murgatroyd, Frédéric Jean
CEA/DEN/DER Gérald Rimpault
EUROTRANS DM1 Safety Meeting, 27-28 November, 2008, FZK, RFA
2
FI6W-CT-2004-516520: Integrated Project on European Transmutation (EUROTRANS)
He-EFIT Core Lay out
Inner spallation module [7]
Outer spallation module [12]
Inner core [186]
Outer core [180]
Shutoff rod [12]
Reflector [150]
Shield [270]
CEA/DEN/DER Gérald Rimpault
EUROTRANS DM1 Safety Meeting, 27-28 November, 2008, FZK, RFA
3
FI6W-CT-2004-516520: Integrated Project on European Transmutation (EUROTRANS)
New Core Design – Detailed Characteristics (1/2)
EFIT Type
Thermal Power (MWth) - Volumic Power
Coolant Type
Coolant Pressure (bar)
Inlet Temperature (°C)
Outlet Temperature (°C)
Plant Efficiency
Cladding Type - Thickness
Spallation module
Accelerator
Zone
Matrix Type
Matrix Fraction
Core Geometry
Number of fissile sub-assemblies
Fissile Height (H)
Wrapper Width over outer Flats
Wrapper Thickness
Inter-Wrapper Gap
Coolant Volumic Fraction (%)
Fuel + Matrix Volumic Fraction (%)
Structure Volume Fraction (%)
CEA/DEN/DER Gérald Rimpault
He-EFIT
400 - 55 MW/m3
He
70
350
572
43.3 % - Indirect S-CO2 cycle with re-compression
SiC/SiCf -Thickness = 1 mm
Solid W He cooled
LINAC - E = 800 MeV - I = 24 mA
1 (Inner)
2 (Outer)
MgO
MgO
45%
45%
186
1.25 m
137 mm
4.0 mm
2.0 mm
44.75%
21.70%
33.56%
EUROTRANS DM1 Safety Meeting, 27-28 November, 2008, FZK, RFA
180
1.25 m
137 mm
4.0 mm
2.0 mm
37.19%
34.98%
27.83%
4
FI6W-CT-2004-516520: Integrated Project on European Transmutation (EUROTRANS)
New Core Design – Detailed Characteristics (2/2)
Zone
Sub-Assembly Bundle Geometry
Number of Pin rows per S/A - Pin per S/A
Pin outer Diameter
Pitch
Pellet/Cladding Gap
Pellet Diameter
Core Thermal-Hydraulics
Average Coolant Speed in the Fissile Core
Max Pin Linear Power
Total Core Pressure Drop
Hottest Channel Thermics
Max Cladding Temperature in the Hottest
Channel
Max Fuel Temperature in the Hottest Channel
2 (Intermediate)
3 (Outer)
8- 217
6.87 mm
8.60 mm
0.081 mm
4.71 mm
5 - 91
11.57 mm
13.20 mm
0.160 mm
9.25 mm
35 m/s
72 W/cm
0.74 Bar
45 m/s
171 W/cm
1.01 Bar
700 °C
711 °C
950 °C
1310 °C
Under nominal conditions :
Large Margins on cladding temperature (120O °C under normal operating
conditions)
Fuel max. temperature (1380 °C) respect the design criteria
To be cross-checked with CATHARE
CEA/DEN/DER Gérald Rimpault
EUROTRANS DM1 Safety Meeting, 27-28 November, 2008, FZK, RFA
5
FI6W-CT-2004-516520: Integrated Project on European Transmutation (EUROTRANS)
Blowers Design
Decay Heat Removal Systems
DHR System
Air-Water
HX
Pump
Air
Hot Water
Ø 800 mm
89.6 mm
Ø 3100 mm
He-Water HX
+ Blower
Accelerator +
Protons beam
1054 mm
Hot He
PCS
HDHR
Cold He
Helium
IHX Design
Core
CEA/DEN/DER Gérald Rimpault
EUROTRANS DM1 Safety Meeting, 27-28 November, 2008, FZK, RFA
6
FI6W-CT-2004-516520: Integrated Project on European Transmutation (EUROTRANS)
Justification of He-EFIT operation reactivity
CEA/DEN/DER Gérald Rimpault
Dr
(pcm)
keff
Safety limit
-
0.99
Core compaction
905
0.9812
Target removal
82
0.9804
Void effect
502
0.9756
handling error
410
0.9717
Cold state limit (20°C)
-
0.9717
Hot zero power limit
(100°C)
72
0.9711
Fuel expansion
169
0.9695
Doppler
99
0.9685
Doppler structure
-21
0.9687
Axial expansion
-66
0.9694
Radial expansion
(diagrid)
72
0.9687
Nominal state limit
-
0.9687
EUROTRANS DM1 Safety Meeting, 27-28 November, 2008, FZK, RFA
7
FI6W-CT-2004-516520: Integrated Project on European Transmutation (EUROTRANS)
He-EFIT Feedback coefficients
KD
(pcm)
BOC
a BOC
(pcm/°
C)
a EOC
(pcm/°
C)
Fuel expansion
-
-0.188
-0.166
Doppler
-81
-
-
Axial expansion
-
0.249
0.314
Radial
expansion
(diagrid)
-
-0.288
-0.252
Axial expansion coefficient takes into account axial expansion and “doppler structure” effects.
All feedback coefficients are negative
except for the axial expansion coefficient which is positive (SiC cladding).
Expansion of PuMAO2 much bigger than SiC in the temperature ranges of the system:
Fuel expansion superseeds SiC axial expansion
CEA/DEN/DER Gérald Rimpault
EUROTRANS DM1 Safety Meeting, 27-28 November, 2008, FZK, RFA
8
FI6W-CT-2004-516520: Integrated Project on European Transmutation (EUROTRANS)
XT-ADS CL-P0 Core Neutronic characteristics (13/11/08)
Results with ERANOS2.1 using JEFF3.1
Gérald Rimpault, Frédéric Jean
Two XT-ADS data (CL-P0 Core) cores :
BOL Core : 68 S/A, Pth = 57 MW
BOC Core : 75 S/A, Pth = 57 MW
CEA/DEN/DER Gérald Rimpault
EUROTRANS DM1 Safety Meeting, 27-28 November, 2008, FZK, RFA
9
FI6W-CT-2004-516520: Integrated Project on European Transmutation (EUROTRANS)
XT-ADS CL-P0 BOL Core : 68 S/A, Pth = 57 MW, Fresh Core
Spallation module [3]
Fuel assembly [68]
IPS [8]
Dummy assembly [62]
Reflector (steel) [45]
CEA/DEN/DER Gérald Rimpault
EUROTRANS DM1 Safety Meeting, 27-28 November, 2008, FZK, RFA
10
FI6W-CT-2004-516520: Integrated Project on European Transmutation (EUROTRANS)
XT-ADS CL-P0 BOC Core : 75 S/A, Pth = 57 MW, Equilibrium Core
Spallation module [3]
Fuel assembly [75]
IPS [8]
Dummy assembly [55]
Reflector (steel) [45]
CEA/DEN/DER Gérald Rimpault
EUROTRANS DM1 Safety Meeting, 27-28 November, 2008, FZK, RFA
11
FI6W-CT-2004-516520: Integrated Project on European Transmutation (EUROTRANS)
XT-ADS CL-P0 Core Neutronic characteristics (13/11/08)
1. XT-ADS data (CL-P0 Core) : Values at Room Temperature i.e. 20°C
d(U,Pu)O2 at 20°C = 10,55 g/cm3 (porosity = 0,9485)
2. XT-ADS data (CL-P0 Core) : Operating temperatures
3. K-Effective
Temperature (°C)
Fuel
875
Clad
384
Coolant
350
Hot zero power
200
Cold state
20
Operating
conditions (Top)
Hot zero power
(200°C)
Cold state
(20°C)
CL-P0 "fresh core"
(68 S/A) BOL
not linked
0.9377
0.9474
0.9550
linked
0.9389
0.9474
0.9550
CL-P0 "equilibrium
core" (75 S/A) linked
BOC
0.9406
0.9487
0.9559
EOC
0.9286
0.9364
0.9435
CEA/DEN/DER Gérald Rimpault
EUROTRANS DM1 Safety Meeting, 27-28 November, 2008, FZK, RFA
12
FI6W-CT-2004-516520: Integrated Project on European Transmutation (EUROTRANS)
XT-ADS data (CL-P0 Core) from room (20°C) to Operating temperatures:
ERANOS density (g/cm3)
•Material densities :
20°C
Top
FUEL
10,55
10,37
CLAD
7,77
7,674
COOLANT
10,34
9,965
ERANOS distance (cm)
•Expanded Dimensions
CEA/DEN/DER Gérald Rimpault
Medium
Dimension (cm)
20°C
Top
Core height
60
60.229
Lattice pitch
9.32
9.356
Pellet ext. radius
0.27
0.27105
Clad int. radius
0.28
0.28109
Clad ext. radius
0.3275
0.32877
Hex. Tube Int. pitch
8.92
8.9546
Hex. Tube Int. pitch
9.32
9.356
EUROTRANS DM1 Safety Meeting, 27-28 November, 2008, FZK, RFA
13
FI6W-CT-2004-516520: Integrated Project on European Transmutation (EUROTRANS)
Feedback coefficients : Theory
Doppler effect
Absorption and fission resonance widening.
Fuel expansion
Axial expansion
Sodium expansion
Spectrum effect + Leakage effect + Capture
Steel expansion
Axial expansion + Radial expansion
Diagrid effect  Diagrid expansion
Differential expansion  Core, vessel, rods expansion
CEA/DEN/DER Gérald Rimpault
EUROTRANS DM1 Safety Meeting, 27-28 November, 2008, FZK, RFA
14
FI6W-CT-2004-516520: Integrated Project on European Transmutation (EUROTRANS)
XT-ADS Core BOL (68 S/A)
Feedback calculations results (linked / not linked) :
Linked calculation
Core state
r (pcm)
Operating state (Top)
-6512
Feedback effects
(200°C --> Tnom)
Dr
(pcm)
Non-linked calculation
keff
r (pcm)
0,9389
-6646
Dr
(pcm)
keff
0,9377
Coolant
expansion
-6158
-354
0,9420
-6291
-355
0,9408
Fuel expansion
-6512
0
0,9389
-6465
-181
0,9393
Doppler
-6196
-316
0,9417
-6328
-318
0,9405
-6631
-15
0,9378
Doppler structure
-15
Axial expansion
-6451
-86
0,9394
-6633
-42
0,9378
Radial expansion
(diagrid)
-6383
-129
0,9400
-6517
-129
0,9388
S Dr
-900
-1040
Hot zero power (200°C)
-5551
-961
0,9474
-5548
-1098
0,9474
Cold state (20°C)
-4707
-1805
0,9550
-4707
-1939
0,9550
CEA/DEN/DER Gérald Rimpault
EUROTRANS DM1 Safety Meeting, 27-28 November, 2008, FZK, RFA
15
FI6W-CT-2004-516520: Integrated Project on European Transmutation (EUROTRANS)
XT-ADS Core BOC/EOC (75 S/A)
Feedback calculations results (linked) :
BOC
Core state
r (pcm)
Operating state (Top)
-6314
Feedback
effects
(200°C --> Tnom)
Dr
(pcm)
EOC
keff
r (pcm)
0,9406
-7691
Dr
(pcm)
keff
0,9286
Coolant density
-5982
-332
0,9436
-7354
-337
0,9315
Fuel expansion
-6314
0
0,9406
-7691
0
0,9286
Doppler
-6000
-314
0,9434
-7373
-318
0,9313
Doppler structure
-15
-15
Axial expansion
-6256
-83
0,9411
-7633
-84
0,9291
Radial expansion
(diagrid)
-6185
-129
0,9418
-7560
-131
0,9297
S Dr
-873
-885
Hot zero power (200°C)
-5408
-906
0,9487
-6788
-903
0,9364
Cold state (20°C)
-4609
-1705
0,9559
-5986
-1705
0,9435
CEA/DEN/DER Gérald Rimpault
EUROTRANS DM1 Safety Meeting, 27-28 November, 2008, FZK, RFA
16
FI6W-CT-2004-516520: Integrated Project on European Transmutation (EUROTRANS)
XT-ADS Core BOL (68 S/A) and BOC/EOC (75 S/A)
Feedback coefficients calculation :
BOL
BOC/EOC linked
SCKCEN
results
a non
linked
(pcm/°C)
K BOC
(pcm)
a BOC
(pcm/°C)
a EOC
(pcm/°C)
a (pcm/°C)
K (pcm)
T1 (°C)
T2 (°C)
K (pcm)
a linked
(pcm/°C)
Coolant density
200
350
-
-2,360
-2,367
-
-2,213
-2,247
-2,36
Fuel expansion
200
875
-
0,000
-0,268
-
0,000
0,000
-
Doppler
200
875
-356
-
-
-354
-
-
-370
Axial expansion
200
350
-
-0,673
-0,380
-
-0,653
-0,660
-0,93
Radial expansion
(diagrid)
200
400
-
-0,645
-0,645
-
-0,645
-0,655
-
Gert currently checking his results for Axial Expansion
CEA/DEN/DER Gérald Rimpault
EUROTRANS DM1 Safety Meeting, 27-28 November, 2008, FZK, RFA
17
FI6W-CT-2004-516520: Integrated Project on European Transmutation (EUROTRANS)
XT-ADS - CL-P0 Core at BOL (68 S/A)
Void effect on reactivity
XT-ADS Core BOL (68 S/A)
1000
Reactivity void effects :
target (3 S/A)
ring 1 (9 S/A)
rings 1&2 (21 S/A)
rings 1-3 (41 S/A)
500
Dr (pcm)
0
-500
-1000
-1500
-2000
0
10
20
30
40
50
60
70
H void (cm)
H void (cm)
target (3
S/A)
ring 1 (9
S/A)
rings 1&2 (21
S/A)
rings 1-3 (41
S/A)
0
0
0
0
0
10
26
114
184
0
20
40
209
358
78
30
2
252
439
64
40
-125
218
376
-125
50
-372
85
119
-574
60
-761
-177
-413
-1430
CEA/DEN/DER Gérald Rimpault
EUROTRANS DM1 Safety Meeting, 27-28 November, 2008, FZK, RFA
18
FI6W-CT-2004-516520: Integrated Project on European Transmutation (EUROTRANS)
XT-ADS Core BOL (68 S/A)
keff safety limits calculation (not linked) :
CEA/DEN/DER Gérald Rimpault
Dr (pcm)
keff
Safety limit
-
0,99
Core compaction
1862
0,9721
Max Void effect
439
0,9680
Cold state limit (20°C)
-
0,9680
Hot zero power limit
(200°C)
841
0,9601
Coolant expansion
355
0,9569
Fuel expansion
181
0,9552
Doppler
318
0,9523
Doppler structure
15
0,9522
Axial expansion
42
0,9518
Radial expansion
(diagrid)
129
0,9506
Nominal state limit
-
0,9506
EUROTRANS DM1 Safety Meeting, 27-28 November, 2008, FZK, RFA
19
FI6W-CT-2004-516520: Integrated Project on European Transmutation (EUROTRANS)
Pb-EFIT CERCER Core Neutronic characteristics (26/11/08)
Results with ERANOS2.1 using JEFF3.1
Gérald Rimpault, Frédéric Jean
CEA/DEN/DER Gérald Rimpault
EUROTRANS DM1 Safety Meeting, 27-28 November, 2008, FZK, RFA
20
FI6W-CT-2004-516520: Integrated Project on European Transmutation (EUROTRANS)
Pb-EFIT
Void effect on reactivity
Pb-EFIT CERCER Core BOL
9000
target (19 S/A)
8000
Reactivity void effects :
ring 1 (18 S/A)
rings 1 & 2 (42 S/A)
rings 1 to 3 (72 S/A)
rings 1 to 4 (108 S/A)
7000
rings 1 to 5 (150 S/A)
Target
Core
Target
Core
Dr (pcm)
6000
5000
4000
3000
90 cm
H void
90 cm
H void
2000
1000
0
0
Target void
10
20
30
Core rings void
40
50
60
70
80
90
H void (cm)
target
(19 S/A)
ring 1
(18 S/A)
rings 1 & 2
(42 S/A)
rings 1 to 3
(72 S/A)
rings 1 to 4
(108 S/A)
rings 1 to 5
(150 S/A)
0
0
0
0
0
0
0
15
4
89
367
901
1603
2170
30
36
192
794
1903
3261
4310
45
63
280
1175
2767
4612
5998
60
72
342
1451
3378
5537
7143
75
62
367
1576
3661
5969
7700
90
30
339
1483
3483
5732
7469
CEA/DEN/DER Gérald Rimpault
100
H void (cm)
EUROTRANS DM1 Safety Meeting, 27-28 November, 2008, FZK, RFA
21
FI6W-CT-2004-516520: Integrated Project on European Transmutation (EUROTRANS)
Pb-EFIT Core
keff safety limits proposal from ANSALDO
CEA/DEN/DER Gérald Rimpault
EUROTRANS DM1 Safety Meeting, 27-28 November, 2008, FZK, RFA
22
FI6W-CT-2004-516520: Integrated Project on European Transmutation (EUROTRANS)
Pb-EFIT CERCER Core
keff safety limits results
Dr (pcm)
keff
Safety limit
-
0.99
Core compaction
1416
0.9763
Max Void effect 7 S/A
387
0.9726
Cold state limit (20°C)
-
0.9726
Hot zero power limit (200°C)
110
0.9716
Coolant expansion
-97
0.9725
Doppler
28
0.9723
Doppler structure
14
0.9721
Axial expansion
35
0.9718
Radial expansion (diagrid)
126
0.9706
Nominal state limit
-
0.9706
Maximum value =>
enveloppe case
Pb plays a shock
absorber role
Need to be discussed
Under revision with 380°C as « Hot zero power temperature »
CEA/DEN/DER Gérald Rimpault
EUROTRANS DM1 Safety Meeting, 27-28 November, 2008, FZK, RFA
23
FI6W-CT-2004-516520: Integrated Project on European Transmutation (EUROTRANS)
Pb-EFIT CERCER Core
Feedback Coefficients
KD (pcm)
BOC
a BOC
(pcm/°C)
a EOC
(pcm/°C)
Coolant expansion
-
0.404
0.338
Doppler
-31
-
-
Axial expansion
-
-0.204
-0.213
Radial expansion
(diagrid)
-
-0.630
-0.615
Coolant expansion under scrutiny
(core, reflector, density, expansion coefficient…)
Massimo Sarotto made the calculation with a variation of 10% in Pb density, only in
the active zone. That accounts for -48 pcm/ % density.
CEA/DEN/DER Gérald Rimpault
EUROTRANS DM1 Safety Meeting, 27-28 November, 2008, FZK, RFA
24
FI6W-CT-2004-516520: Integrated Project on European Transmutation (EUROTRANS)
Extra Viewgraphs
CEA/DEN/DER Gérald Rimpault
EUROTRANS DM1 Safety Meeting, 27-28 November, 2008, FZK, RFA
25
FI6W-CT-2004-516520: Integrated Project on European Transmutation (EUROTRANS)
Feedback coefficient calculations
• Références:
Notes techniques CEA: M.Vanier, JC Klein (SMFR)
Thèse CEA Na Byung Chan, 1996
• Doppler effect :
r 
KD
T  K D 
T
Dr
T 
ln  2 
 T1 
• Others feedback : linear variation :
k


Dr
Dr Dconc
1

 Dr 1%conc 

DT Dconc DT
D
T
 1%conc 
• Coolant expansion :
 1  a Cool
c  c 0 1 a CoolDT     
300 a Cool

c
 DT 
3
 1 c  0.99c 0
c0
3
Dk Cool  300 a Cool Dr 1%Cool
CEA/DEN/DER Gérald Rimpault
EUROTRANS DM1 Safety Meeting, 27-28 November, 2008, FZK, RFA
26
FI6W-CT-2004-516520: Integrated Project on European Transmutation (EUROTRANS)
Feedback coefficient calculations
k steel_ axial  100asteelDr1%steel
• Steel expansion: Axial:
 Vsteel 
k steel_ radial  200a steelDr1%Cool 

V
 Cool 
Radial:
• Fuel expansion:


k fuel  100ai Dr1%fuel  Dr1%height  Drsteel Doppler
i = Fuel if not linked, i = steel if linked
• Diagrid effect:

k som  100 a steel Dr 1% R _ fis  2

CEA/DEN/DER Gérald Rimpault


1  VCool 
 Dr 1% steel  Dr 1% Fuel  Dr 1% abs  
 Dr 1% Cool 

 VCool 


EUROTRANS DM1 Safety Meeting, 27-28 November, 2008, FZK, RFA
27
FI6W-CT-2004-516520: Integrated Project on European Transmutation (EUROTRANS)
Feedback calculation method :
CONDITIONS_DE_FONCTIONNEMENT
MILIEU (EDL_MILSTD)
REFERENCE_UNIT 'BBL_REF'
DILATATION
RADIALE 400.0 'MSTRU'
AXIALE 350.0 'MSTRU'
CALCUL LIE
TEMPERATURE
COMBUSTIBLE 875.0
FERTILE
384.0
STRUCTURE
384.0
CALOPORTEUR 350.0
ABSORBANT
384.0
Radial expansion (400°C  200°C)
Axial expansion (350°C  200°C)
Linked/not linked calculation
Fuel expansion (875°C  200°C)
Axial expansion (384°C  200°C)
Coolant expansion (350°C  200°C)
ECCO calculation :
CELLULE 'CCOMB'
EDITION MINI
'ASSEMBLAGE COMBUSTIBLE 1 INITIAL'
TEMPERATURE 1 (TSTRU)
2 (TSTRU)
3 (TCALO)
4 (TCOMBDOP)
5 (TCOMBDOP)
6 (TSTRU)
7 (TSTRU)
8 (TCALO)
9 (TCALO)
10 (TSTRU)
11 (TCALO)
CEA/DEN/DER Gérald Rimpault
Doppler (TCOMBDOP = 200°C)
EUROTRANS DM1 Safety Meeting, 27-28 November, 2008, FZK, RFA
28
FI6W-CT-2004-516520: Integrated Project on European Transmutation (EUROTRANS)
XT-ADS Core BOL (68 S/A)
Feedback coefficients calculation :
Using the
« conditions de
fonctionnement »
module i.e.
Operating conditions
Method with 1%
density change and
1% height
Linked
-0,407 pcm/°C
-0,363 pcm/°C
Non linked
-0,087 pcm/°C
-0,341 pcm/°C
Adding steel Doppler, Linked value become -0,673
Gert has found -0.93 and is currently checking his results for Axial Expansion
CEA/DEN/DER Gérald Rimpault
EUROTRANS DM1 Safety Meeting, 27-28 November, 2008, FZK, RFA
29
FI6W-CT-2004-516520: Integrated Project on European Transmutation (EUROTRANS)
Pb-EFIT CERCER core
inner core: 42 assemblies; intermediate core: 66 assemblies; outer core: 72 assemblies,
CEA/DEN/DER Gérald Rimpault
EUROTRANS DM1 Safety Meeting, 27-28 November, 2008, FZK, RFA
30
FI6W-CT-2004-516520: Integrated Project on European Transmutation (EUROTRANS)
Pb-EFIT CERCER core
towards CERMET Core
A Proposal
CERCER
CERMET
169
91
7
5
9.52 mm
13.99 mm
Lisse
Lisse
1.42
1.31
13.54 mm
18.34 mm
Hydraulic Diameter
8.64 mm
9.04 mm
0.60 mm
Cladding Thickness
0.60 mm
0.60 mm
0.160 mm
0.160 mm
Pellet/Cladding Gap
0.160 mm
0.160 mm
Pellet Diameter
7.10 mm
11.15 mm
Pellet Diameter
8.00 mm
12.47 mm
Coolant Fraction
54.0%
46.5%
Coolant Fraction
54.0%
46.5%
Inner + Intermediate
Outer
CERCER
CERMET
169
91
Number of Pin per S/A
7
5
Number of Pin rows per SA
8.62 mm
12.67 mm
Cladding Roughness
Lisse
Lisse
Pitch to Rod Ratio
1.58
1.46
13.63 mm
18.46 mm
Hydraulic Diameter
8.64 mm
9.04 mm
Cladding Thickness
0.60 mm
Pellet/Cladding Gap
Number of Pin per S/A
Number of Pin rows per SA
Pin outer Diameter
Pitch (mm)
CEA/DEN/DER Gérald Rimpault
Pin outer Diameter
Cladding Roughness
Pitch to Rod Ratio
Pitch (mm)
EUROTRANS DM1 Safety Meeting, 27-28 November, 2008, FZK, RFA
31