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Journal Articles

Understanding muon diffusion in perovskite oxides below room temperature based on harmonic transition state theory

Ito, Takashi; Higemoto, Wataru; Shimomura, Koichiro*

Physical Review B, 108(22), p.224301_1 - 224301_11, 2023/12

 Times Cited Count:1 Percentile:0(Materials Science, Multidisciplinary)

JAEA Reports

Mesh effect around burnable poison rod of cell model for HTTR fuel block

Fujimoto, Nozomu*; Fukuda, Kodai*; Honda, Yuki*; Tochio, Daisuke; Ho, H. Q.; Nagasumi, Satoru; Ishii, Toshiaki; Hamamoto, Shimpei; Nakano, Yumi*; Ishitsuka, Etsuo

JAEA-Technology 2021-008, 23 Pages, 2021/06

JAEA-Technology-2021-008.pdf:2.62MB

The effect of mesh division around the burnable poison rod on the burnup calculation of the HTTR core was investigated using the SRAC code system. As a result, the mesh division inside the burnable poison rod does not have a large effect on the burnup calculation, and the effective multiplication factor is closer to the measured value than the conventional calculation by dividing the graphite region around the burnable poison rod into a mesh. It became clear that the mesh division of the graphite region around the burnable poison rod is important for more appropriately evaluating the burnup behavior of the HTTR core..

JAEA Reports

Fast reactor nuclear physics parameters calculation code system "EXPARAM"

Iijima, Susumu*; Kato, Yuichi*; Takasaki, Kenichi*; Okajima, Shigeaki

JAERI-Data/Code 2004-016, 91 Pages, 2004/12

JAERI-Data-Code-2004-016.pdf:7.45MB

The calculation code system "EXPARAM" was designed to analyze the experimental results systematically measured at the fast critical assembly (FCA). Some calculation codes developed independently in JAERI and in US research institutes were collected and arranged as the fast reactor physics calculation code system. The multi-group core calculation code and the perturbation calculation code based on the diffusion theory and the transport theory calculate the reactor physics parameters such as eigenvalue, reaction rate, Doppler reactivity worth and sodium void worth. The dynamic physics parameters such as prompt neutron lifetime and effective delayed neutron fraction are also calculated. Input and Output data of calculation codes are transferred to each other using a direct access file on UNIX computer system.

Journal Articles

Introduction to modern nodal method and discontinuity factor

Okumura, Keisuke

Nihon Genshiryoku Gakkai Dai-36-Kai Robutsuri Kaki Semina Tekisuto, p.81 - 102, 2004/08

The modern node method which uses a discontinuous factor has come to be widely used recently in the reactor core analyses of commercial light water reactors. The basic theory, numerical computation technique and examples of calculation results are explained for biginners of the modern nodal method.

JAEA Reports

Control rod position and temperature coefficients in HTTR power-rise tests; Interim report

Fujimoto, Nozomu; Nojiri, Naoki; Takada, Eiji*; Saito, Kenji; Kobayashi, Shoichi; Sawahata, Hiroaki; Kokusen, Shigeru

JAERI-Tech 2000-091, 49 Pages, 2001/03

JAERI-Tech-2000-091.pdf:2.0MB

no abstracts in English

Journal Articles

Start up core physics tests of High Temperature Engineering Test Reactor (HTTR), 2; First criticality by an annular form fuel loading and its criticality prediction method

Fujimoto, Nozomu; Nakano, Masaaki*; Takeuchi, Mitsuo; Fujisaki, Shingo; Yamashita, Kiyonobu

Nihon Genshiryoku Gakkai-Shi, 42(5), p.458 - 464, 2000/05

 Times Cited Count:6 Percentile:42.55(Nuclear Science & Technology)

no abstracts in English

JAEA Reports

Study of burnable absorber reactivity worth evaluation method considering the position of burnable absorber rod in a block using VHTRC experimental results

Fujimoto, Nozomu; Yamashita, Kiyonobu; Akino, Fujiyoshi

JAERI-Research 99-052, p.51 - 0, 1999/09

JAERI-Research-99-052.pdf:2.05MB

no abstracts in English

JAEA Reports

Analysis of the HTTR's benchmark problems and comparison between the HTTR and the FZJ code systems

Fujimoto, Nozomu; U.Ohlig*; H.Brockmann*; Yamashita, Kiyonobu

JAERI-Tech 98-060, 56 Pages, 1999/01

JAERI-Tech-98-060.pdf:2.25MB

no abstracts in English

JAEA Reports

MOSRA-Light; High speed three-dimensional nodal diffusion code for vector computers

Okumura, Keisuke

JAERI-Data/Code 98-025, 243 Pages, 1998/10

JAERI-Data-Code-98-025.pdf:10.15MB

no abstracts in English

JAEA Reports

Preliminary analyses for HTTR's start-up physics tests by HTTR nuclear characteristics evaluation code system

Fujimoto, Nozomu; Nojiri, Naoki; Nakano, Masaaki*; Takeuchi, Mitsuo; Fujisaki, Shingo; Yamashita, Kiyonobu

JAERI-Tech 98-021, 66 Pages, 1998/06

JAERI-Tech-98-021.pdf:2.63MB

no abstracts in English

JAEA Reports

SRAC95; General purpose neutronics code system

Okumura, Keisuke; *;

JAERI-Data/Code 96-015, 445 Pages, 1996/03

JAERI-Data-Code-96-015.pdf:12.94MB

no abstracts in English

JAEA Reports

Fission product release analysis code during accident condition of HTGR; RACPAC

Sawa, Kazuhiro; Tazawa, Yujiro*; Itakura, Hirofumi*

JAERI-M 91-128, 33 Pages, 1991/08

JAERI-M-91-128.pdf:0.91MB

no abstracts in English

Journal Articles

Response matrix of square node with full symmetries

Annals of Nuclear Energy, 18(8), p.455 - 465, 1991/00

 Times Cited Count:3 Percentile:40.77(Nuclear Science & Technology)

no abstracts in English

Journal Articles

D-He$$^{3}$$ fusion yield in higher harmonic ICRF heated plasma

Yamagiwa, Mitsuru; Kimura, Haruyuki; Takizuka, Tomonori; Fujii, Tsuneyuki

Proc. of the 17th EPS Conf. on Controlled Fusion and Plasma Heating, p.1007 - 1010, 1990/00

no abstracts in English

JAEA Reports

Vectorization of nuclear codes 89-1; PHENIX,FPGS

*; *; *; Harada, Hiro

JAERI-M 89-124, 80 Pages, 1989/09

JAERI-M-89-124.pdf:1.53MB

no abstracts in English

JAEA Reports

SRAC:JAERI thermal reactor standard code system for reactor design and analysis

; ; ; ; *; *

JAERI 1285, 242 Pages, 1983/01

JAERI-1285.pdf:10.27MB

no abstracts in English

JAEA Reports

Journal Articles

Anisotropic diffusion effect on criticality of plate lattice fast assembly

; Iijima, Tsutomu

Journal of Nuclear Science and Technology, 15(8), p.553 - 567, 1978/08

 Times Cited Count:0

no abstracts in English

Journal Articles

Measurement of anisotropy of diffusion coefficient in plate cell

; Iijima, Tsutomu

Journal of Nuclear Science and Technology, 14(6), p.462 - 464, 1977/06

 Times Cited Count:3

no abstracts in English

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