Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Konno, Chikara; Kwon, Saerom*; Fischer, G.*
ANS RPSD 2018; 20th Topical Meeting of the Radiation Protection and Shielding Division of ANS (CD-ROM), 4 Pages, 2018/08
IAEA released two patches for TRANSX2.15 for the MATXS file of FENDL-2.0 in 1998. The first patch is required for all MATXS files, but it is not known well because it is not officially included to TRANSX2.15. Recently we investigated effects of the patch with a simple calculation. As a result, it is found out that the patch solves an overestimation problem of neutron fluxes in Sn calculations with self-shielding corrected multigroup libraries generated with the original TRANSX code. This patch should be officially included to TRANSX2.15 because it is essential.
Furuta, Takuya
ANS RPSD 2018; 20th Topical Meeting of the Radiation Protection and Shielding Division of ANS (CD-ROM), 5 Pages, 2018/08
Recently we introduced a function in PHITS to treat tetrahedral-mesh geometry. Tetrahedral-mesh geometry is a structure composed of combination of tetrahedrons and able to construct complex objects. Tetrahedral-mesh objects can be obtained by converting polygon data using mesh generation software such as TetGen. We also implemented a function in PHITS to export tally results into the format of the three-dimensional visualization software ParaView. TetGen is able to convert the polygon data into ParaView format. Together with these tools, three-dimensional analysis can be realized for PHITS simulation using a polygon objects.
Yamamoto, Kazami; Yamakawa, Emi*; Takayanagi, Tomohiro; Miki, Nobuharu*; Kamiya, Junichiro; Saha, P. K.; Yoshimoto, Masahiro; Yanagibashi, Toru*; Horino, Koki*; Nakanoya, Takamitsu; et al.
ANS RPSD 2018; 20th Topical Meeting of the Radiation Protection and Shielding Division of ANS (CD-ROM), 9 Pages, 2018/08
The existing beam power of the J-PARC Rapid Cycling Synchrotron is up to 500 kW, and higher radiation doses are concentrated in the injection area. These activations are caused by the interaction between the foil and the beam. To reduce dose exposure to workers near the injection point, we study a new design of the injection scheme. Experience has shown that eddy currents are generated in the metal flange near the magnet owing to the pulsed magnetic field, and the temperature exceeds 100 degrees C. The shield installed in the new injection system needs to have a layer structure, in which an insulator is inserted between iron shields to reduce the eddy current. From the results of the shielding calculation, even if 1 mm of polyethylene was inserted between two 9-mm-thick SUS 316 plates, which serve as shielding material, the shielding performance was reduced only about 5%, and we confirmed that it would function well.
Furuta, Takuya; Abe, Shinichiro; Hashimoto, Shintaro; Kai, Takeshi; Ogawa, Tatsuhiko; Sato, Tatsuhiko; Iwase, Hiroshi*; Niita, Koji*
no journal, ,
Particle and Heavy Ion Transport code System (PHITS) is a general purpose Monte Carlo radiation transport simulation code in three-dimensional geometry. For electrons and positrons, the EGS5 model embedded in PHITS is used for transport calculation above 1 keV while the track structure calculation mode is used for that below 1 keV. Transport of other charged particles is simulated by continuous slowing down process and stochastic reaction process. The former process is computed using the ATIMA algorithm and the latter process is computed by adopting suitable reaction models and data libraries depending on the particle and the energy range. Improvement of proton induced simulations by incorporating the JENDL-4.0 High Energy File and extension of the track structure mode to heavy ions are our future perspectives.
Furuta, Takuya; Sato, Tatsuhiko; Iwamoto, Yosuke; Hashimoto, Shintaro; Ogawa, Tatsuhiko; Abe, Shinichiro; Kai, Takeshi; Tsai, P.-E.; Matsuda, Norihiro; Iwase, Hiroshi*; et al.
no journal, ,
Particle and Heavy Ion Transport code System (PHITS) is a general purpose Monte Carlo radiation transport simulation code in three-dimensional geometry. PHITS simulations can be executed in multiple platforms: Windows, Mac, and Linux. Parallel computation is also available with MPI and OpenMP. PHITS is able to transport almost any kind of particles, such as neutrons, protons, heavy ions, photons, and electrons, over a wide energy range up to 1 TeV by using various reaction models and data libraries. Originally the so-called general geometry (GG) configuration was adopted in PHITS; recently complex objects represented by tetrahedral-mesh becomes available. The PHITS development team is actively working for upgrades. The update patches are released at least once per year. The update information is announced through the PHITS mailing list.