The application of “Helios” supercomputer in radiation safety studies for the IFMIF

The HELIOS supercomputer system at International Fusion Energy Research Centre, Aomori, Japan has been extensively utilized in radiation safety studies for the International Fusion Materials Irradiation Facility (IFMIF). This paper is focusing on the neutronic analysis to support the layout of the high energy beam transport (HEBT) section of IFMIF. The McDeLicious-11 Monte Carlo code, which is an enhancement to MCNP5, was utilized in order to simulate the neutron generation in the IFMIF lithium target through d-Li(d,xn) reactions and the R2Smesh approach was utilized to evaluate the ambient dose distribution after shutdown. The necessary thickness of the biological shielding and additional local shielding for the HEBT section has been evaluated. The accessibility of HEBT rooms and a necessary cooling time is discussed based on the result of shutdown dose analysis.

[1]  G. Schweimer.  Fast neutron production with 54 MeV deuterons , 1967 .

[2]  G. Lhersonneau,et al.  Neutron yield from carbon, light- and heavy-water thick targets irradiated by 40 MeV deuterons , 2009 .

[3]  Kuo Tian,et al.  Neutronic analysis for the IFMIF target and test cell using a new CAD-based geometry model , 2012 .

[4]  Arkady Serikov,et al.  Verification and validation of the R2Smesh approach for the calculation of high resolution shutdown dose rate distributions , 2012 .

[5]  Ulrich Fischer,et al.  Status of the McDeLicious Approach for the D-Li Neutron Source Term Modeling in IFMIF Neutronics Calculations , 2012 .

[6]  Rafael Juarez,et al.  Radioprotection Analysis for the High Energy Beam Transport Line of the Accelerator Facility of IFMIF , 2012 .

[7]  U. Fischer,et al.  Dose Rate Analyses for the High Energy Beam Transport Section of IFMIF , 2012 .

[8]  Ulrich Fischer,et al.  Rigorous mcnp based shutdown dose rate calculations: computational scheme, verification calculations and application to ITER , 2002 .

[9]  Masayoshi Sugimoto,et al.  Main baseline of IFMIF/EVEDA project , 2009 .

[10]  T. Itoga,et al.  Experimental studies on the neutron emission spectrum and activation cross-section for 40 MeV deuterons in IFMIF accelerator structural elements , 2004 .

[11]  Ulrich Fischer,et al.  Shutdown dose calculations for the IFMIF test facility and the high flux test module (The 12th International Conference on Radiation Shielding (ICRS-12) and the 17th Topical Meeting of the Radiation Protection and Shielding Division of ANS (RPSD-2012)) -- (Accelerator Facilities) , 2014 .

[12]  Kuo Tian,et al.  Neutronic analysis for the IFMIF EVEDA reference test cell and test facility , 2014 .