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Nagaya, Yasunobu; Adachi, Masaaki*
Proceedings of International Conference on Mathematics & Computational Methods Applied to Nuclear Science & Engineering (M&C 2017) (USB Flash Drive), 6 Pages, 2017/04
MVP is a general-purpose Monte Carlo code for neutron and photon transport calculations based on the continuous-energy method. To speed up the MVP code, hybrid parallelization is applied with a message passing interface library MPI and a shared-memory multiprocessing library OpenMP. The performance test has been done for an eigenvalue calculation of a fast reactor subassembly, a fixed-source calculation of a neutron/photon coupled problem and a PWR full core model. Comparisons has been made for MPI only with 4 processes and hybrid parallelism with 4 processes 
3 threads. As a result, the hybrid parallelism yields the reduction of elapsed time by 16% to 34% and the used memories are almost the same.
Akiyama, Mitsunaga*; Katakura, Fumishige*; Kawasaki, Nobuo*; Nemoto, Toshiyuki*; Tsuruoka, Takuya*; Adachi, Masaaki*; Ishizuki, Shigeru*; Kume, Etsuo
JAERI-Data/Code 2003-009, 307 Pages, 2003/07
JAERI-Data-Code-2003-009.pdf:10.37MB
Several computer codes in the nuclear field have been vectorized, parallelized and transported on the supar computer system at Center for Promotion of Computational Science and Engineering in Japan Atomic Energy Research Institute. We dealt with 10 codes in fiscal 2001. In this report, the parallelization of Newtron Radiography for 3 dimensional CT code NR3DCT, the vectorization of Unsteady-state heat conduction code THERMO3D, the porting of initial program of MHD simulation, the tuning of Heat And Mass Balance Analysis Code HAMBAC, the porting and parallelization of Monte Carlo N-Particle transport code MCNP4C3, the porting and parallelization of Monte Carlo N-Particle Transport code system MCNPX2.1.5, the porting of code CINAC-V4, the porting of Assisted Model Building with Energy Refinement Amber5 code system, the part of additional VisLink library Multidimensional Two-fluid model code ACD3D and the porting of experiment data processing code for GS8500 to SR8000 are described.
Idomura, Yasuhiro; Adachi, Masaaki*; Gorai, Kazuo; Suzuki, Yoshio; Wang, X.*
Purazuma, Kaku Yugo Gakkai-Shi, 79(2), p.172 - 187, 2003/02
Under the Numerical EXperiment of Tokamak (NEXT) research project, various fluid, particle, and hybrid codes have been developed. These codes require a computational environment which consists of high performance processors, high speed storage system, and high speed parallelized visualization system. In this paper, the performance of the JAERI Origin3800 system is examined from a point of view of these requests. In the performance tests, it is shown that the representative particle and fluid codes operate with 
% of processing efficiency up to 512 processors. A storage area network (SAN) provides high speed parallel data transfer. A parallel visualization system enables order of magnitude faster visualization of a large scale simulation data compared with the previous graphic workstations. Accordingly, an extremely advanced simulation environment is realized on the JAERI Origin3800 system. Recently, development of a storage grid is underway in order to improve a computational environment of remote users. The storage grid is constructed by a combination of SAN and a wavelength division multiplexer (WDM). The preliminary tests show that compared with the existing data transfer methods, it enables dramatically high speed data transfer 
Gbps over a wide area network.
Idomura, Yasuhiro; Adachi, Masaaki*; Suzuki, Yoshio; Wang, X.*
Saientifikku, Shisutemu Kenkyukai Heisei-14-Nendo Kagaku Gijutsu Keisan Bunkakai Dai-1-Kai Kaigo Shiryo, p.43 - 59, 2002/08
no abstracts in English
Adachi, Masaaki*; Ishizuki, Shigeru*; Ogasawara, Shinobu*; Kume, Etsuo; Yatake, Yoichi*; Nemoto, Toshiyuki*; Kawasaki, Nobuo*; Kawai, Wataru*
JAERI-Data/Code 2000-043, 220 Pages, 2001/02
JAERI-Data-Code-2000-043.pdf:7.39MB
no abstracts in English
Kawasaki, Nobuo*; Nemoto, Toshiyuki*; Kawai, Wataru*; Ogasawara, Shinobu*; Ishizuki, Shigeru*; Kume, Etsuo; Yatake, Yoichi*; Adachi, Masaaki*
JAERI-Data/Code 2000-039, 134 Pages, 2001/01
JAERI-Data-Code-2000-039.pdf:4.32MB
no abstracts in English
Yatake, Yoichi*; Kume, Etsuo; Kawai, Wataru*; Nemoto, Toshiyuki*; Kawasaki, Nobuo*; Adachi, Masaaki*; Ishizuki, Shigeru*; Ogasawara, Shinobu*
JAERI-Data/Code 2000-038, 57 Pages, 2000/12
JAERI-Data-Code-2000-038.pdf:2.3MB
no abstracts in English
Ishizuki, Shigeru*; Ogasawara, Shinobu*; Kawai, Wataru*; Nemoto, Toshiyuki*; Kume, Etsuo; Adachi, Masaaki*; Kawasaki, Nobuo*; Yatake, Yoichi*
JAERI-Data/Code 2000-018, p.217 - 0, 2000/03
JAERI-Data-Code-2000-018.pdf:6.35MB
no abstracts in English
Nemoto, Toshiyuki*; Kawasaki, Nobuo*; Kume, Etsuo; Kawai, Wataru*; Adachi, Masaaki*; Ishizuki, Shigeru*; Yatake, Yoichi*; Ogasawara, Shinobu*
JAERI-Data/Code 2000-017, p.99 - 0, 2000/03
JAERI-Data-Code-2000-017.pdf:3.31MB
no abstracts in English
Yatake, Yoichi*; Adachi, Masaaki*; Kume, Etsuo; Kawai, Wataru*; Kawasaki, Nobuo*; Nemoto, Toshiyuki*; Ishizuki, Shigeru*; Ogasawara, Shinobu*
JAERI-Data/Code 2000-016, p.43 - 0, 2000/03
JAERI-Data-Code-2000-016.pdf:1.36MB
no abstracts in English
*; *; *; *; *; Adachi, Masaaki*; Ogasawara, Shinobu*; *; Kume, Etsuo
JAERI-Data/Code 99-027, 39 Pages, 1999/05
JAERI-Data-Code-99-027.pdf:1.21MB
no abstracts in English
*; *; *; *; *; Ogasawara, Shinobu*; Adachi, Masaaki*; *; Kume, Etsuo
JAERI-Data/Code 99-026, 91 Pages, 1999/05
JAERI-Data-Code-99-026.pdf:2.9MB
no abstracts in English
*; *; *; *; *; *; Ogasawara, Shinobu*; Adachi, Masaaki*; Kume, Etsuo
JAERI-Data/Code 99-020, 168 Pages, 1999/03
JAERI-Data-Code-99-020.pdf:5.34MB
no abstracts in English
