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Journal Articles

Characteristic test of initial HTTR core

Nojiri, Naoki; Shimakawa, Satoshi; Fujimoto, Nozomu; Goto, Minoru

Nuclear Engineering and Design, 233(1-3), p.283 - 290, 2004/10

 Times Cited Count:11 Percentile:60.18(Nuclear Science & Technology)

This paper describes the results of core physics test in start-up and power-up of the HTTR. The tests were conducted in order to ensure performance and safety of the high temperature gas cooled reactor, and was carried out to measure the critical approach, the excess reactivity, the shutdown margin, the control rod worth, the reactivity coefficient, the neutron flux distribution and the power distribution. The expected core performance and the required reactor safety characteristics were verified from the results of measurements and calculations.

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.

Journal Articles

Development of Reduced-Moderation Water Reactor (RMWR) for sustainable energy supply

Iwamura, Takamichi; Okubo, Tsutomu; Kureta, Masatoshi; Nakatsuka, Toru; Takeda, Renzo*; Yamamoto, Kazuhiko*

Proceedings of 13th Pacific Basin Nuclear Conference (PBNC 2002) (CD-ROM), 7 Pages, 2002/10

In order to ensure sustainable energy supply in Japan, the reduced-moderation water reactor (RMWR) has been developed by JAERI since 1998. MOX fuel assemblies with tight lattice arrangement are used to increase the conversion ratio. In order to establish negative void reactivity coefficient, the core should be short and flat to increase neutron leakage from the core. The core designs were accomplished to a large core with 1,356MWe and a small core with 330MWe. For both cores, negative void coefficient and natural circulation cooling of the core were realized. To confirm thermal-hydraulic feasibility, critical heat flux experiments were performed using 7-rod bundles with the gap width of 1mm and 1.3mm. The results indicated that enough cooling was assured for the tight lattice core. Further R&D studies, including large scale thermal-hydraulic experiments, reactor physics experiments, development of high burn-up fuel cladding material and simplified reprocessing technology, are necessary to realize commercial introduction of RMWR by 2020's for the replacement of current generation LWRs.

Journal Articles

Startup core physics tests of High Temperature Engineering Test Reactor (HTTR), 1; Test plan, fuel loading and nuclear characteristics tests

Yamashita, Kiyonobu; Fujimoto, Nozomu; Takeuchi, Mitsuo; Fujisaki, Shingo; Nakano, Masaaki*; Umeta, Masayuki; Takeda, Takeshi; Mogi, Haruyoshi; Tanaka, Toshiyuki

Nihon Genshiryoku Gakkai-Shi, 42(1), p.30 - 42, 2000/01

 Times Cited Count:3 Percentile:27.02(Nuclear Science & Technology)

no abstracts in English

JAEA Reports

Improvement of core calculation model of High Temperature Engineering Test Reactor; Related with excess reactivity

Fujimoto, Nozomu; Yamashita, Kiyonobu

JAERI-Research 99-059, p.43 - 0, 1999/11

JAERI-Research-99-059.pdf:2.51MB

no abstracts in English

Journal Articles

Weapon-grade plutonium burning with HTRs

Yamane, Tsuyoshi; Yamashita, Kiyonobu; Fujimoto, Nozomu

New approaches to the nuclear fuel cycles and related disposal schemes, 1, p.267 - 277, 1998/00

no abstracts in English

Journal Articles

Benchmark problems of start-up core physics of High Temperature engineering Test Reactor (HTTR)

Yamashita, Kiyonobu; Nojiri, Naoki; Fujimoto, Nozomu; Nakano, Masaaki*; Ando, Hiroei; Nagao, Yoshiharu; Nagaya, Yasunobu; Akino, Fujiyoshi; Takeuchi, Mitsuo; Fujisaki, Shingo; et al.

Proc. of IAEA TCM on High Temperature Gas Cooled Reactor Applications and Future Prospects, p.185 - 197, 1998/00

no abstracts in English

JAEA Reports

Reactor physics activities in Japan; July, 1992 $$sim$$ July, 1993

Research Committee on Reactor Physics

JAERI-M 93-254, 36 Pages, 1994/01

JAERI-M-93-254.pdf:1.27MB

no abstracts in English

JAEA Reports

Reactor physics activities in Japan; June 1991 $$sim$$ July 1992

Research Committee on Reactor Physics

JAERI-M 92-209, 43 Pages, 1993/01

JAERI-M-92-209.pdf:1.43MB

no abstracts in English

Journal Articles

Selected reactor physics phenomena observed during N.S.Mutsu power-up tests

; Miyoshi, Yoshinori; *; *; ;

Proc. of the Int. Conf. on Nuclear Power Plant Operations; Ready for 2000, p.435 - 441, 1992/00

no abstracts in English

Journal Articles

Experimental study on reactivity worth for absorber material in high conversion light water reactor using FCA-HCLWR core fueled with enriched uranium

Okajima, Shigeaki; Osugi, Toshitaka; Sakurai, Takeshi; *

Journal of Nuclear Science and Technology, 27(10), p.950 - 959, 1990/10

no abstracts in English

Journal Articles

Reactor physics research activities related to the very high temperature reactor in Japan

Nuclear Science and Engineering, 97, p.145 - 160, 1987/00

 Times Cited Count:2 Percentile:30.06(Nuclear Science & Technology)

no abstracts in English

12 (Records 1-12 displayed on this page)
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