1. Shutdown Dose Rate for TBM Port #16
Barbara Caiffia,b
Mikhail Osipenko b
Mauro Taiuti a,b
aUniversità degli Studi di Genova
bINFN, Sezione di Genova
Cadarache, 20 October 2014

2. Outlook Aim of the activity Description of the MCNP model of Port#16
- with Dummy TBMs
- with TBMs
R2S method
Results
Conclusions
B.Caiffi Cadarache, 20 October 2014

3. Evaluate the Dose Rate in the Port Interspace Region
Aim of the Activity
Evaluate the Dose Rate in the Port Interspace Region
106 s after the shutdown
B.Caiffi Cadarache, 20 October 2014

4. Intermediate Steps
Calculation of the neutron flux and spectrum in all the relevant regions
► Neutron transport with the Monte Carlo code MCNP
Calculation of the material activation due to the neutron irradiation
►Deterministic inventory code FISPACT
Calculation of the g dose in the Port Interspace
►g transport with the Monte Carlo code MCNP
B.Caiffi Cadarache, 20 October 2014

5. Calculation Procedures and Codes
- MCNP5 v1.6 with nuclear DATA FENDL 2.1
- MCNP Model Blitev3 Variant (JR5EZH, ENEA contract 2013)
- FISPACT 10.0/0 (2011) with nuclear data EAF-2010
PROCEDURE:
- Standard D-T neutron source included in B-lite v3
- Reference ITER irradiation scenario SA2 (ITER D 2V3V8G)
- SDR calculation with R2S method
- Multiprocessors MPI capability on CRESCO cluster (ENEA)
B.Caiffi Cadarache, 20 October 2014

6. TBM Port 16 CATIA v5 model provided by IO
B.Caiffi Cadarache, 20 October 2014

7. TBM Frame Design Frame dimensions (mm):
Single frame double dogleg configuration
Frame dimensions (mm):
3250 (radial) x 2160 (poloidal) x 1710 (toroidal)
Weight 29.2
~35 mm
~75 mm
~45 mm
~75 mm
~40 mm
~25 mm
B.Caiffi Cadarache, 20 October 2014

8. Dummy TBM Design Dummy TBM dimensions(mm):
2280 (radial) x 1740 (poloidal) x 532 (toroidal)
Weight 9.4
B.Caiffi Cadarache, 20 October 2014

9. ITER TBM Port Plug Gap Configuration
Clearance
Blanket
1st DL VV
2nd DL
Port Extension
Top
20mm
75 mm
15 mm
35 mm
20 mm
Side (symmetric)
25 mm
Bottom
SIDE VIEW
20 mm
20 mm
15 mm
15 mm
20 mm
15 mm
20 mm
15 mm
25 mm
20 mm
Shim plate between VV and TBM
Frame and between TBM Frame
and Dummy TBM
25 mm
Revised TBM Port Plug Gap Configuration
IDM G33C2U_v1_0 (May 2013)
B.Caiffi Cadarache, 20 October 2014

10. ITER TBM Port Plug Gap Configuration
Clearance
Blanket
1st DL VV
2nd DL
Port Extension
Top
20mm
75 mm
15 mm
35 mm
20 mm
Side (symmetric)
25 mm
Bottom
SIDE VIEW
Dummy TBM
15 mm
15 mm
20 mm
25 mm
TBM Frame
15 mm
20 mm
20 mm
25 mm
Blanket VV
25 mm
20 mm
Shim plate between VV and TBM
Frame and between TBM Frame
and Dummy TBM
25 mm
Revised TBM Port Plug Gap Configuration
IDM G33C2U_v1_0 (May 2013)
B.Caiffi Cadarache, 20 October 2014

11. ITER TBM Port Plug Gap Configuration
Clearance
Blanket
1st DL VV
2nd DL
Port Extension
Top
20mm
75 mm
15 mm
35 mm
20 mm
Side (symmetric)
25 mm
Bottom
TOP VIEW
20 mm
20 mm
15 mm
15 mm
20 mm
20 mm
20 mm
15 mm
20 mm
20 mm
15 mm
20 mm
15 mm
Revised TBM Port Plug Gap Configuration
IDM G33C2U_v1_0 (May 2013)
15 mm
B.Caiffi Cadarache, 20 October 2014

12. MCNP Model B.Caiffi Cadarache, 20 October 2014
Final Report on Neutronic Analysis of the ITER TBM IDM JR5EZH (October 2013)
Proposed chemical compositions for Neutronic Analysis of TBM PP” IDM D6FP5C v1.2 (Jan 2013)
B.Caiffi Cadarache, 20 October 2014

13. MCNP Model – TBM Frame B.Caiffi Cadarache, 20 October 2014
Final Report on Neutronic Analysis of the ITER TBM IDM JR5EZH (October 2013)
Proposed chemical compositions for Neutronic Analysis of TBM PP” IDM D6FP5C v1.2 (Jan 2013)
B.Caiffi Cadarache, 20 October 2014

14. MCNP Model – Dummy TBMs B.Caiffi Cadarache, 20 October 2014
Final Report on Neutronic Analysis of the ITER TBM IDM JR5EZH (October 2013)
Proposed chemical compositions for Neutronic Analysis of TBM PP” IDM D6FP5C v1.2 (Jan 2013)
B.Caiffi Cadarache, 20 October 2014

15. MCNP Model – Pipe Forest
CATIAv5 drawing of Pipe Forest received by IO (June 2013)
Space Claim MCAM 4.8 used for the conversion
MATERIALS N°
Material
Component
Reference 1
316L steel
(EN grade)
Pipe Forest Structure Port #16
ITER_D_D6FP5C
(R. Villari) 2
316L pipes
Pipe Forest Pipes Port #16 3
Euroferr
LiPb Pipes in Pipe Forest #16
F4E_D_239WLJ v2.1 4
LiPb
LiPb in Pipe Forest #16 5
Thermal insulator
The model includes:
Pipe Forest Common Structure (includes Rail Structure)
6 He cooling system pipes
2 Tririum Extraction pipes
6 Dignostic Pipes
2 LiPb Pipes
B.Caiffi Cadarache, 20 October 2014

16. MCNP Model – Pipe Forest
Common Structures
Material: 316L steel (EN grade)
Thermal Insulator
Material: Microtherm
LiPb Pipes
Material: PbLi Eutectic Alloy
Material: Eurofer-97
B.Caiffi Cadarache, 20 October 2014

17. MCNP Model – Pipe Forest
He cooling system pipes
Homogenized material:
31 % 316L pipes (EN grade)
69 % void
Diagnostic Pipes
Homogenized material:
28 % 316L pipes (EN grade)
72 % void
Tritium extraction system pipes
Homogenized material:
38 % 316L pipes (EN grade)
62 % void
B.Caiffi Cadarache, 20 October 2014

18. MCNP Model – Pipe Forest
HORIZONTAL CUT (Z=120 cm)
VERTICAL CUT (Y=-35 cm)
MATERIALS
Concrete
SS 604 Cryostat
SS 316-IG
SS 316-IG (38%)
+ Void (62%)
Euroferr
LiPb
Microtherm
B.Caiffi Cadarache, 20 October 2014

19. MCNP Global Model XY PLANE (z=0) XZ PLANE (y=0)
B.Caiffi Cadarache, 20 October 2014

20. MCNP Model – HCLL & HCBP TBMs
MCNP HCLL & HCBP TBM Model (IDM 23YGEJ) received from F4E through ITER IO
(July 2013)
HCLL
IDM 23YGEJ
IDM 23YGEJ
B.Caiffi Cadarache, 20 October 2014

21. MCNP Model – HCLL & HCBP TBMs
MCNP HCLL & HCBP TBM Model (IDM 23YGEJ) received from F4E through ITER IO
(July 2013)
HCPB
IDM 23YGEJ
IDM 23YGEJ
B.Caiffi Cadarache, 20 October 2014

22. MCNP Model – HCLL & HCBP TBMs
B.Caiffi Cadarache, 20 October 2014

23. MCNP Model – HCLL & HCBP TBMs
F4E TBM Sets inside IO TBM Frame
Discrepancies:
TBM positions:
- shifted backforward in the radial direction of 4.0 cm
- not aligned with the TBM Frame in the toroidal and
poloidal directions
TBMs dimension:
- 484 (toroidal) x 1660 (poloidal) instead of 462 (toroidal) x 1670 (poloidal) (ref. Dummy TBM)
→neglecting radial dimension (specific for the TBM
considered) F4E TBMs are taller than IO specifications of
1 cm and narrower of 1.8 cm
Gaps between TBMs and TBM Frame:
-top: 40 mm ( should be 15 mm)
-side: 20 mm on ext , -8 mm on int (should be 15 mm)
-bottom: 0 mm (should be 15 mm)
TBM Shields dimensions
Gaps between TBM shields and TBM Frame
In particolar radial extension 306 mm longer than IO design
Horizontal cut (z=62)
B.Caiffi Cadarache, 20 October 2014

24. MCNP Model – HCLL & HCBP TBMs
N.B all units are mm
B.Caiffi Cadarache, 20 October 2014

25. MCNP Model – HCLL & HCBP TBMs
N.B all units are mm
B.Caiffi Cadarache, 20 October 2014

26. MCNP Model – HCLL & HCBP TBMs
N.B all units are mm
B.Caiffi Cadarache, 20 October 2014

27. MCNP Model – HCLL & HCBP TBMs
TBMs Fitting:
+4.0 cm shift in radial direction
+1.6 cm shift (HCBP) and -1.6 cm shift (HCLL) in toroidal direction
+2.0 cm shift in poloidal direction
-1.1 cm of thickness on both side for the He+Euroferr box in toroidal direction to fullfill the 15 mm gap requirement
+ 0.5 cm of thickess on both sidefor the He+Euroferr box in poloidal direction to fullfill the 15 mm gap requirement
15mm
15mm
15mm
15mm
15mm
15mm
15mm
B.Caiffi Cadarache, 20 October 2014

28. MCNP Model – HCLL & HCBP TBMs
TBM Shields Fitting:
F4E TBM shields do not fit with latest IO TBM Frame Design
They were replaced completely with the dummy TBMs rear part
Material modification in order to be consistent with the F4E model
F4E TBM SHIELDS
Dummy TBMs (rear part)
Materials
SS 316-IG (50%) +
Water (50%)
SS 316-IG
B4C
B.Caiffi Cadarache, 20 October 2014

29. MCNP Model – HCLL & HCBP TBMs
B.Caiffi Cadarache, 20 October 2014

30. MCNP Model – HCLL & HCBP TBMs
HORIZONTAL CUT (Y=35cm)
B.Caiffi Cadarache, 20 October 2014

31. MCNP Global Model XY PLANE (z=0) XZ PLANE (y=0)
B.Caiffi Cadarache, 20 October 2014

32. Rigorous 2 Steps (R2S) Method
1) Monte Carlo neutron transport
2) Deterministic activation calculation
3) Monte Carlo g transport
B.Caiffi Cadarache, 20 October 2014

33. Rigorous 2 Steps (R2S) Method
1) Monte Carlo neutron transport
2) Deterministic activation calculation
3) Monte Carlo g transport
INPUT
CODE
OUTPUT
MCNP Input File
(3D geometry, materials,
cross section libraries,
neutron source)
Neutron flux
and spectra map
MCNP5 - N
B.Caiffi Cadarache, 20 October 2014

34. Rigorous 2 Steps (R2S) Method
1) Monte Carlo neutron transport
2) Deterministic activation calculation
3) Monte Carlo g transport
INPUT
CODE
OUTPUT
MCNP Input File
(3D geometry, materials,
cross section libraries,
neutron source)
Neutron flux
and spectra map
MCNP5 - N
Neutron flux n/cm2s
Neutron spectrum
VOXEL
B.Caiffi Cadarache, 20 October 2014

35. Rigorous 2 Steps (R2S) Method
1) Monte Carlo neutron transport
2) Deterministic activation calculation
3) Monte Carlo g transport
INPUT
CODE
OUTPUT
MCNP Input File
(3D geometry, materials,
cross section libraries,
neutron source)
Neutron flux
and spectra map
MCNP5 - N
B.Caiffi Cadarache, 20 October 2014

36. Rigorous 2 Steps (R2S) Method
1) Monte Carlo neutron transport
2) Deterministic activation calculation
3) Monte Carlo g transport
INPUT
CODE
OUTPUT
MCNP Input File
(3D geometry, materials,
cross section libraries,
neutron source)
Neutron flux
and spectra map
MCNP5 - N
Material
Irradiation Scenario
Decay Time
Activity map
FISPACT
γ source
B.Caiffi Cadarache, 20 October 2014

37. Rigorous 2 Steps (R2S) Method
1) Monte Carlo neutron transport
2) Deterministic activation calculation
3) Monte Carlo g transport
INPUT
CODE
OUTPUT
MCNP Input File
(3D geometry, materials,
cross section libraries,
neutron source)
Neutron flux
and spectra map
MCNP5 - N
Material
Irradiation Scenario
Decay Time
Activity map
FISPACT
γ source
MCNP Input File
(3D geometry, materials,
cross section libraries,
γ source)
γ-to-dose factors
MCNP5 - P
Shutdown dose
rate map
B.Caiffi Cadarache, 20 October 2014

38. MCNP MESHES VERTICAL CUT HORIZONTAL CUT z[cm] y[cm] x[cm] x[cm] PORT
INTERSPACE
PORT PLUG
PORT
INTERSPACE
PORT
PLUG
z[cm]
y[cm]
300
200
100
-100
-200
-300
BLANKET
350
250
150 50
-50
-150
-250
TFC
MESH2
MESH2
TFC
MESH1
MESH1
TBM1
TBM2
TFC
BIOSHIELD
TFC
CRYOSTAT
CRYOSTAT
VACUUM
VESSEL
BIOSHIELD
x[cm]
x[cm]
B.Caiffi Cadarache, 20 October 2014

39. MCNP MESHES Port Plug Mesh XZ VIEW XY VIEW 400 cm 350 cm 340 cm
Single Mesh voxel 10*10*10 cm3
Number of voxel 35*34*40=47600
B.Caiffi Cadarache, 20 October 2014

40. MCNP MESHES Port Interspace Mesh XZ VIEW XY VIEW 400 cm 400 cm 340 cm
200
-200
-400
XY VIEW
400 cm
400 cm
340 cm
Single Mesh voxel 10*10*10 cm3
Number of voxel 40*34*40=54400
X[cm]
B.Caiffi Cadarache, 20 October 2014

41. Results with Dummy TBMs: Neutron Flux
B.Caiffi Cadarache, 20 October 2014

42. Results with Dummy TBMs: Activation
Gamma source
Ptrac plot XY
Ptrac plot XY
(sezione)
Spettro gamma
Ptrac plot XZ
Ptrac plot XZ
sezione
Tabella nuclidi
principali
B.Caiffi Cadarache, 20 October 2014

43. Results with Dummy TBMs: SDR
COME poster 2D
B.Caiffi Cadarache, 20 October 2014

44. Results with Dummy TBMs: SDR
COME poster 1D confronto con sara
B.Caiffi Cadarache, 20 October 2014

45. MCNP MESHES Port Plug Mesh XZ VIEW XY VIEW 400 cm 350 cm 340 cm
Single Mesh voxel 10*10*10 cm3
Number of voxel 35*34*40=47600
B.Caiffi Cadarache, 20 October 2014

46. MCNP MESHES Port Interspace Mesh XZ VIEW XY VIEW 400 cm 400 cm 340 cm
200
-200
-400
XY VIEW
400 cm
400 cm
340 cm
Single Mesh voxel 10*10*10 cm3
Number of voxel 40*34*40=54400
X[cm]
B.Caiffi Cadarache, 20 October 2014

47. Results with TBMs: Neutron Flux
Port Plug Mesh
B.Caiffi Cadarache, 20 October 2014

48. Results with TBMs: Neutron Flux
Gamma source
Ptrac plot XY
Ptrac plot XY
(sezione)
Spettro gamma
Ptrac plot XZ
Ptrac plot XZ
sezione
Tabella nuclidi
principali
B.Caiffi Cadarache, 20 October 2014

49. Results with TBMs: Neutron Flux
COME poster 2D
B.Caiffi Cadarache, 20 October 2014

50. Results with TBMs: Neutron Flux
COME poster 1D confronto con sara
B.Caiffi Cadarache, 20 October 2014

51. Conclusions
TAim of the analysis was the evaluation of the shutdown dose rate 106 s after the shutdown in the maintenance area of TBM Port #16.
The MCNP model in the configuration with the Dummy TBMs and the HCLL and HCBP TBM was prepared
Neutron fluxes and spectra were calculated in the regions of interest
Activation was calculated and main nuclides were calculated
Shutdown Dose Rate was calculated in all
B.Caiffi Cadarache, 20 October 2014

53. Backup Slides

54. More in detail...
Preparation of a R2S tool based on shell and C++ scripts to couple MCNP with FISPACT.
Test of the R2S tool in a simple geometry (benchmark) as a validation.
Test of the R2S tool in a complex geometry (Blite v3 Variant with Dummy TBMs) as a further validation.
Preparation of the MCNP model based on Blite v3 Variant integrated with details of Port #16
Evaluation of the SDR in the Port Interspace of Port # s after the Shutdown

56. x[cm] HORIZONTAL CUT (Z=120 cm) VERTICAL CUT (Y=-35 cm) MATERIALS
Water
SS 316-IG
SS 316-IG(80%)+water(20%)
SS 316-IG(77%)+water(23%)
SS 316-IG(71%)+water(29%)
SS 316-IG(86%)+water(14%)
Microtherm
HORIZONTAL CUT (Z=120 cm)
VERTICAL CUT (Y=-35 cm)

57. 15 mm
15 mm

58. 15 mm
15 mm

59. Dummy TBM dimensions(mm): 2280 (radial) x 1740 (poloidal) x 532 (toroidal) – weight 9.4
Dummy TBMs and TBM Frame gaps: 15 mm
Frame and VV gaps from 15 to 30 mm gaps
MATERIALS:
- SS316(LN) IG
- SS660(bolts and washers)
- Ni-Al-Bronze alloy (inserts)
- Microtherm
MCNP Model of TBM frame + Dummy TBMs was provided by ENEA through ITER IO
CAD design of PORT #16 PIPE forest was provided by IO
MCNP of TBMSets+TBM Shields was Provided by F4E through ITER IO

60. TBM PORT #16 PORT BIOSHIELD INTERSPACE PLUG TBM FRAME DUMMY TBM2
Dose rate in Port Interspace should be no higher
than 100 μSv/h 106 s after the shudown.
►The neutronic model is based on the Blitev3 Variant for TBM Port #2 [1] ( i.e. Blite v3 integrated with the detailed model of the TBM Port Plug and of the Pipe Forest).
►The Pipe Forest of [1] was entirely replaced with that of TBM Port #16.
►The preparation of the Pipe Forest model was performed processing its CATIA drawing with Space Claim 2012 and converting it with MCAM[2].
►MCNP5 v1.6 transport code with FENDL 2.1 libraries and FISPACT v10.0 inventory code were used.
►MCNP and FISPACT were coupled with C++ and Unix scripts (mesh-based R2S approach).
►Two meshes cover the PP and the PI regions, respectively (see drawing below). The voxel dimensions are 5*5*5 cm3 for the neutron flux evaluation and 10*10*10 cm3 for the neutron spectrum evaluation.
►SA2 [3] irradiation scenario was considered.
►MCNP simulations were carried out using the MPI capability of the CRESCO cluster at ENEA[4].
PORT
INTERSPACE
BIOSHIELD
PLUG
TBM FRAME
DUMMY TBM2
DUMMY TBM1

61. U=181 HCPB TBM U=182 HCLL TBM 15 mm 15 mm 15 mm 15 mm 15 mm 15 mm

62. MCNP Model – HCLL & HCBP TBMs
F4E TBM+ TBM shields inserted in the latest IO Frame
Discrepancies:
TBM positions
TBMs dimension:
Gaps between TBMs and TBM Frame
TBM Shields dimensions
Gaps between TBM shields and TBM Frame
Horizontal cut (z=62)
Δx=4.0 cm
- Shifted backward of 4.0 cm
- Not aligned with the frame in the toroidal direction
B.Caiffi Cadarache, 20 October 2014

63. MCNP Model – HCLL & HCBP TBMs
VERTICAL CUT
u=160 pipes
(not drawn in this plot)
U=180
Shielding
U=182
HCLL TBM
B.Caiffi Cadarache, 20 October 2014

64. MCNP Model – HCLL & HCBP TBMs
HCPB
VERTICAL CUT
u=160 pipes
(not drawn in this plot)
U=180
Shielding
U=181
HCPB TBM
B.Caiffi Cadarache, 20 October 2014

65. MCNP Model – HCLL & HCBP TBMs
HORIZONTAL CUT
U=181
HCPB TBM
U=182
HCLL TBM
u=160 pipes
(not drawn in this plot)
U=180
Shielding
B.Caiffi Cadarache, 20 October 2014

66. MCNP Model – Pipe Forest
XY PLANE
MCNP Model containing:
TBM Frame+ Dummy TBMs
( IDM JR5EZH)
Pipe Forest
(conversion from IO CATIA drawing)
Cryostat+Bioshield (from Alite)
400
200
-200
-400
Maintenance Area
Corridor
B.Caiffi Cadarache, 20 October 2014

67. MCNP Model – Pipe Forest
XZ PLANE
MCNP Model containing:
TBM Frame+ Dummy TBMs
( IDM JR5EZH)
Pipe Forest
(conversion from IO CATIA drawing)
Cryostat+Bioshield (from Alite)
Bioshield
Plug
Cryostat
extention
Bioshield
Plug
YZ PLANE
B.Caiffi Cadarache, 20 October 2014

68. MCNP Model – HCLL & HCBP TBMs
MAIN MATERIALS
HCLL TBM
HCBP TBM
TBM SHIELD
EUROFER+He
LiPb
Inconel 718
EUROFER+He
Li4SiO4 Be
SS 316-IG (50%) + Water (50%)
SS 316-IG
B4C
HCLL
VERTICAL CUT (Y=-35 cm)
HCBP
VERTICAL CUT (Y=35cm)
HORIZONTAL CUT (Y=35cm)
B.Caiffi Cadarache, 20 October 2014

69. Benchmark
B.Caiffi Cadarache, 20 October 2014