Shutdown Dose Rate for TBM Port #16

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Presentation transcript:

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

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

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

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

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

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

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

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

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

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

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

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

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

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

MCNP Model – Pipe Forest CATIAv5 drawing of Pipe Forest received by IO (June 2013) Space Claim2012 + 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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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 900 1000 1100 1200 1300 1400 1500 x[cm] 900 1000 1100 1200 1300 1400 1500 x[cm] B.Caiffi Cadarache, 20 October 2014

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

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 800 1000 1200 1400 1600 X[cm] B.Caiffi Cadarache, 20 October 2014

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

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

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

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

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

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 800 1000 1200 1400 1600 X[cm] B.Caiffi Cadarache, 20 October 2014

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

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

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

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

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

Backup Slides

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 #16 106 s after the Shutdown

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)

15 mm 15 mm

15 mm 15 mm

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

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

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

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

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

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

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

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 850 1050 1250 1450 1650 B.Caiffi Cadarache, 20 October 2014

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

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

Benchmark B.Caiffi Cadarache, 20 October 2014