Refine your search:     
Report No.
 - 
Search Results: Records 1-20 displayed on this page of 22

Presentation/Publication Type

Initialising ...

Refine

Journal/Book Title

Initialising ...

Meeting title

Initialising ...

First Author

Initialising ...

Keyword

Initialising ...

Language

Initialising ...

Publication Year

Initialising ...

Held year of conference

Initialising ...

Save select records

JAEA Reports

Impact assessment for internal flooding in HTTR (High temperature engineering test reactor)

Tochio, Daisuke; Nagasumi, Satoru; Inoi, Hiroyuki; Hamamoto, Shimpei; Ono, Masato; Kobayashi, Shoichi; Uesaka, Takahiro; Watanabe, Shuji; Saito, Kenji

JAEA-Technology 2021-014, 80 Pages, 2021/09

JAEA-Technology-2021-014.pdf:5.87MB

In response to the new regulatory standards established in response to the accident at TEPCO's Fukushima Daiichi Nuclear Power Station in March 2011, measures and impact assessments related to internal flooding at HTTR were carried out. In assessing the impact, considering the characteristics of the high-temperature gas-cooled reactor, flooding due to assumed damage to piping and equipment, flooding due to water discharge from the system installed to prevent the spread of fire, and flooding due to damage to piping and equipment due to an earthquake. The effects of submersion, flooding, and flooding due to steam were evaluated for each of them. The impact of the overflow of liquids containing radioactive materials outside the radiation-controlled area was also evaluated. As a result, it was confirmed that flooding generated at HTTR does not affect the safety function of the reactor facility by taking measures.

Journal Articles

High temperature gas-cooled reactors

Takeda, Tetsuaki*; Inagaki, Yoshiyuki; Aihara, Jun; Aoki, Takeshi; Fujiwara, Yusuke; Fukaya, Yuji; Goto, Minoru; Ho, H. Q.; Iigaki, Kazuhiko; Imai, Yoshiyuki; et al.

High Temperature Gas-Cooled Reactors; JSME Series in Thermal and Nuclear Power Generation, Vol.5, 464 Pages, 2021/02

As a general overview of the research and development of a High Temperature Gas-cooled Reactor (HTGR) in JAEA, this book describes the achievements by the High Temperature Engineering Test Reactor (HTTR) on the designs, key component technologies such as fuel, reactor internals, high temperature components, etc., and operational experience such as rise-to-power tests, high temperature operation at 950$$^{circ}$$C, safety demonstration tests, etc. In addition, based on the knowledge of the HTTR, the development of designs and component technologies such as high performance fuel, helium gas turbine and hydrogen production by IS process for commercial HTGRs are described. These results are very useful for the future development of HTGRs. This book is published as one of a series of technical books on fossil fuel and nuclear energy systems by the Power Energy Systems Division of the Japan Society of Mechanical Engineers.

Journal Articles

Reactor physics experiment in graphite moderation system for HTGR, 1

Fukaya, Yuji; Nakagawa, Shigeaki; Goto, Minoru; Ishitsuka, Etsuo; Kawakami, Satoru; Uesaka, Takahiro; Morita, Keisuke; Sano, Tadafumi*

KURNS Progress Report 2018, P. 148, 2019/08

The Japan Atomic Energy Agency (JAEA) started the Research and Development (R&D) to improve nuclear prediction techniques for High Temperature Gas-cooled Reactors (HTGRs). The objectives are to introduce generalized bias factor method to avoid full mock-up experiment for the first commercial HTGR and to introduce reactor noise analysis to High Temperature Engineering Test Reactor (HTTR) experiment. To achieve the objectives, the reactor core of graphite moderation system named B7/4"G2/8"p8EUNU+3/8"p38EU(1) was newly composed in the B-rack of Kyoto University Critical Assembly (KUCA). The core plays a role of the reference core of the bias factor method, and the reactor noise was measured to develop the noise analysis scheme. In addition, training of operator of HTTR was also performed during the experiments.

JAEA Reports

Homogeneity confirmation test of bituminized products

Kinoshita, Junichi; Endo, Masayuki; Uesaka, Takahiro

JAEA-Testing 2012-003, 29 Pages, 2012/11

JAEA-Testing-2012-003.pdf:2.95MB

The comparatively high level liquid radioactive wastes generated from the nuclear facilities in the Nuclear Science Research Institute of JAEA have been treated by the bituminization system. In the future, bituminized products could be disposed of as homogeneously solidified products, if their qualities would meet with the technical standards of homogeneously solidified products which are stipulated in nuclear regulatory law. In this report, we summarized the measurement results of the density and radioactivity of solidified products in order to get basic data for future disposal.

JAEA Reports

Integrity evaluation of removable lid type shielded container

Uesaka, Takahiro; Kozawa, Masachiyo; Matsumoto, Junko; Endo, Masayuki; Kinoshita, Junichi; Suzuki, Takeshi; Suzuki, Hisao; Morishita, Satoru; Sakamoto, Yu

JAEA-Technology 2012-015, 29 Pages, 2012/06

JAEA-Technology-2012-015.pdf:3.22MB

In Japan Atomic Energy Agency Nuclear Science Research Institute waste treatment building No.2 treat intermediate-level solid waste. Solid wastes are reduced in volume by compaction. They are then canned in stainless can, which are subsequently put in 200-liter concrete-lined drums or 1-m$$^{3}$$ concrete containers, filled with concrete. To prepare for disposal in future, be able to make fit with the technical standard of waste package, we were asked to change the lid type shielded container. Therefore due to the change of lid type shielded container, we confirmed integrity of it with evaluation of close volt by drop analysis, evaluation of shielding, and drop test with a prototype model.

Journal Articles

Energetic protons from a few-micron metallic foil evaporated by an intense laser pulse

Matsukado, Koji*; Esirkepov, T. Z.; Kinoshita, Kenichi*; Daido, Hiroyuki; Utsumi, Takayuki*; Li, Z.*; Fukumi, Atsushi*; Hayashi, Yukio; Orimo, Satoshi; Nishiuchi, Mamiko; et al.

Physical Review Letters, 91(21), p.215001_1 - 215001_4, 2003/11

 Times Cited Count:136 Percentile:95.28(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Effect of a laser prepulse on a narrow-cone ejection of MeV electrons from a gas jet irradiated by an ultrashort laser pulse

Hosokai, Tomonao*; Kinoshita, Kenichi*; Zhidkov, A.*; Nakamura, Kei*; Watanabe, Takahiro*; Ueda, Toru*; Kotaki, Hideyuki; Kando, Masaki; Nakajima, Kazuhisa; Uesaka, Mitsuru*

Physical Review E, 67(3), p.036407_1 - 036407_8, 2003/03

 Times Cited Count:81 Percentile:93.13(Physics, Fluids & Plasmas)

no abstracts in English

Journal Articles

Compact X-ray sources by intense laser interactions with beams and plasmas

Kotaki, Hideyuki; Kando, Masaki; Dewa, Hidenori; Kondo, Shuji; Watanabe, Takahiro*; Ueda, Toru*; Kinoshita, Kenichi*; Yoshii, Koji*; Uesaka, Mitsuru*; Nakajima, Kazuhisa

Nuclear Instruments and Methods in Physics Research A, 455(1), p.166 - 171, 2000/11

 Times Cited Count:14 Percentile:66.62(Instruments & Instrumentation)

no abstracts in English

Journal Articles

Generation and application of femtosecond X-ray pulse

Uesaka, Mitsuru*; Kotaki, Hideyuki; Nakajima, Kazuhisa; Harano, Hideki*; Kinoshita, Kenichi*; Watanabe, Takahiro*; Ueda, Toru*; Yoshii, Koji*; Kando, Masaki; Dewa, Hidenori; et al.

Nuclear Instruments and Methods in Physics Research A, 455(1), p.90 - 98, 2000/11

 Times Cited Count:36 Percentile:88.99(Instruments & Instrumentation)

no abstracts in English

Journal Articles

Experimental verification of laser photocathode RF gun as an injector for a laser plasma accelerator

Uesaka, Mitsuru*; Kinoshita, Kenichi*; Watanabe, Takahiro*; Sugahara, Jun*; Ueda, Toru*; Yoshii, Koji*; Kobayashi, Tetsuya*; Halz, N.*; Nakajima, Kazuhisa; Sakai, Fumio*; et al.

IEEE Transactions on Plasma Science, 28(4), p.1133 - 1142, 2000/08

 Times Cited Count:14 Percentile:41.88(Physics, Fluids & Plasmas)

no abstracts in English

Journal Articles

Generation, diagnosis and application of femtosecond electron single bunch

Uesaka, Mitsuru*; Watanabe, Takahiro*; Kinoshita, Kenichi*; Sugahara, Jun*; Harano, Hideki*; Ueda, Toru*; Yoshii, Koji*; Nakajima, Kazuhisa; Sakai, Fumio*; Kotaki, Hideyuki; et al.

Nihon Genshiryoku Gakkai-Shi, 42(4), p.310 - 324, 2000/04

 Times Cited Count:0 Percentile:0.01(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Compact X-ray sources by intense laser interactions with beams and plasmas

Kotaki, Hideyuki; Kando, Masaki; Dewa, Hidenori; Kondo, Shuji; Watanabe, Takahiro*; Ueda, Toru*; Kinoshita, Kenichi*; Yoshii, Koji*; Uesaka, Mitsuru*; Nakajima, Kazuhisa

Lasers Plasma Generation and Diagnostics (Proceedings of SPIE Vol.3935), p.149 - 155, 2000/01

no abstracts in English

Journal Articles

Experimental results of laser wakefield acceleration using a femtosecond laser pulse

Kando, Masaki; Ahn, H.; Dewa, Hidenori; Kotaki, Hideyuki; Ueda, Toru*; Uesaka, Mitsuru*; Watanabe, Takahiro*; Nakanishi, Hiroshi*; Ogata, Atsushi*; Nakajima, Kazuhisa

Japanese Journal of Applied Physics, Part 2, 38(8B), p.L967 - L969, 1999/08

 Times Cited Count:23 Percentile:69.12(Physics, Applied)

no abstracts in English

Journal Articles

Short pulse X-ray generation via backward Thomson scattering on relativistic electron beam

Kotaki, Hideyuki; Nakajima, Kazuhisa*; Kando, Masaki*; Dewa, Hidenori*; Kondo, Shuji; *; Watanabe, Takahiro*; Ueda, Toru*; Nakanishi, Hiroshi*; Yoshii, Koji*; et al.

Inst. Phys. Conf. Ser., (159), p.565 - 567, 1999/00

no abstracts in English

Journal Articles

Performance tests of BNL/KEK/SHI Protocathode RF gun

Kando, Masaki; Kotaki, Hideyuki; Dewa, Hidenori; Kondo, Shuji; Yoshii, Koji*; Ueda, Toru*; Watanabe, Takahiro*; Uesaka, Mitsuru*; Sakai, Fumio*; Ogata, Atsushi*; et al.

Proceedings of 24th Linear Accelerator Meeting in Japan, p.128 - 130, 1999/00

no abstracts in English

Journal Articles

Recent progress of laser wakefield acceleration experiments at KEK/U.Tokyo/JAERI

Nakajima, Kazuhisa; Nakanishi, Hiroshi*; Ogata, Atsushi*; Harano, Hideki*; Ueda, Toru*; Uesaka, Mitsuru*; Watanabe, Takahiro*; Yoshii, Koji*; Dewa, Hidenori; Hosokai, Tomonao; et al.

Proceedings of 6th European Particle Accelerator Conference (EPAC98) (CD-ROM), p.809 - 811, 1998/01

no abstracts in English

Journal Articles

A Short pulse X-ray generation via laser thomson scattering on relativistic electron beams

Kotaki, Hideyuki; Nakajima, Kazuhisa*; Kando, Masaki*; H.Ahn*; Dewa, Hidenori*; Kondo, Shuji; *; Watanabe, Takahiro*; Ueda, Toru*; Nakanishi, Hiroshi*; et al.

Proc. of 11th Symp. on Accelerator Sci. and Technol., p.449 - 451, 1997/00

no abstracts in English

Journal Articles

Development of high duty operation RF photoinjector

*; Kotaki, Hideyuki; Nakajima, Kazuhisa*; Kando, Masaki*; Kondo, Shuji; Dewa, Hidenori*; Watanabe, Takahiro*; Ueda, Toru*; Yoshii, Koji*; Kinoshita, Kenichi*; et al.

Proc. of 11th Symp. on Accelerator Sci. and Technol., p.473 - 475, 1997/00

no abstracts in English

Journal Articles

Laser Wakefield Acceleration Experiments

Kotaki, Hideyuki; Nakajima, Kazuhisa*; Kando, Masaki*; H.Ahn*; Dewa, Hidenori*; Kondo, Shuji; *; Watanabe, Takahiro*; Ueda, Toru*; Nakanishi, Hiroshi*; et al.

Proc. of 11th Symp. on Accelerator Sci. and Technol., p.513 - 515, 1997/00

no abstracts in English

Oral presentation

Technical support for planning and installation of simple ground repository; FY2011 status of support activities for promotion of decontamination in the Fukushima Environmental Safety Center, JAEA

Abe, Hironobu; Ikeda, Koki; Mikake, Shinichiro; Nagasaki, Yasushi; Niizato, Tadafumi; Asazuma, Shinichiro; Aoki, Isao; Ishikawa, Nobuyuki; Ishikawa, Hiroyasu; Ishizaki, Nobuhiro; et al.

no journal, , 

no abstracts in English

22 (Records 1-20 displayed on this page)