Examination of analytical method of rare earth elements in used nuclear fuel

Ozawa, Mayumi; Fukaya, Hiroyuki; Sato, Makoto; Kamohara, Keiko*; Suyama, Kenya; Tonoike, Kotaro; Oki, Keiichi; Umeda, Miki

Proceedings of 53rd Annual Meeting of Hot Laboratories and Remote Handling Working Group (HOTLAB 2016) (Internet), 9 Pages, 2016/11

Suggestion from young researchers in symposium II conducted by Japan Health Physics Society about Fukushima Daiichi Nuclear Power Plant Accident; Focusing on internal exposure management to relate to Fukushima Daiichi Nuclear Power Plant Accident

Kono, Takahiko; Ogino, Haruyuki*; Tani, Kotaro*; Fujimichi, Yuki*; Hokama, Tomonori

Hoken Butsuri, 46(3), p.227 - 231, 2011/09

https://doi.org/10.5453/jhps.46.227

no abstracts in English

Report on investigation of unexpected reactor shutdown of the TRACY facility; Cause and countermeasures

Sono, Hiroki; Tsukamoto, Michio; Aizawa, Eiju; Takeuchi, Masaki; Fukaya, Yuji; Iseda, Hirokatsu*; Ogawa, Kazuhiko; Sakuraba, Koichi; Tonoike, Kotaro

UTNL-R-0446, p.3_1 - 3_10, 2005/03

This report describes an investigation and countermeasures of the unexpected reactor shutdown of the TRACY facility at the Japan Atomic Energy Research Institute on June 17, 2004, caused by a malfunction of a safety rod of the facility. As a result of the investigation, the principal cause of the malfunction was ascribed to a drop in attraction of a binding magnet for the safety rod by a small piece of a foreign material. The following countermeasures were taken against its recurrence: prevention of incidence of foreign materials, reduction of the chance of intrusion of foreign materials into devices, and certain detection of foreign materials. This lesson learned through the experience is expected to be shared with the staffs concerned in reactor operation and maintenance.

Annual report of STACY operation in FY.1999; Experiments on two unit neutron-interacting system with slab-shaped core tanks and 10% enriched uranyl nitrate solutions, 1 (Contract research)

Onodera, Seiji; Sono, Hiroki; Hirose, Hideyuki; Tanino, Shuichi; Kaminaga, Jota*; Myomae, Tomoki*; Murakami, Kiyonobu; Sakuraba, Koichi; Miyauchi, Masakatsu; Tonoike, Kotaro; et al.

JAERI-Tech 2000-059, 46 Pages, 2000/11

JAERI-Tech-2000-059.pdf:2.86MB

no abstracts in English

Isotopic composition measurement of FP nuclides in spent LWR UO fuel and nucleonics analysis, 2; Measurements of FP nuclides

Ito, Mitsuo; Fukaya, Hiroyuki; Ueno, Takashi; Miyata, Seiichi; Sonoda, Takashi; Usami, Hidehiko; Sakazume, Yoshinori; Kurosawa, Tatsuya; Kawasaki, Yasushi; Inagawa, Jun; et al.

no journal, , 

no abstracts in English

Aiming to establish a rational system of radiation protection in Japan; How to incorporate the international standards

Ogino, Haruyuki*; Kono, Takahiko; Shimada, Kazumasa*; Tani, Kotaro*; Fujimichi, Yuki*

no journal, , 

no abstracts in English

Evaluation of residual uranium enrichment in burnt BWR fuel assembly

Sekiya, Yukou*; Takaki, Naoyuki*; Tonoike, Kotaro

no journal, , 

Fuel pellets may be scattered, in the accident of Fukushima Daiichi Nuclear Power Station, without melting in the containment vessels. Precise information of composition of the burnt BWR fuel assemblies is necessary to study the criticality control method for the scattered fuel pellets. In this study, distribution of residual U enrichment was evaluated, for each of the reactors, using a model of a fuel-rod array in a fuel assembly.

Report from special research group on lessons on radiation protection after Fukushima-Daiichi NPP Accident

Kosako, Toshiso*; Tani, Kotaro*; Ogino, Haruyuki*; Iida, Takao*; Hattori, Takatoshi*; Oda, Keiji*; Omi, Tadashi*; Furuta, Sadaaki*; Murakami, Hironori*; Kasai, Atsushi*; et al.

no journal, , 

Two proposal notes were written by the Japan Health Physics Society in terms of the issues on radiation protection considering the arguments in many academic symposiums after the accident in TEPCO Fukushima-Daiichi NPP resulting from the Great East Japan Earthquake of March 11, 2011. These proposal notes were referred in some symposiums, and the follow-up activities are needed for collecting the chronological information after the Fukushima accident and for considering these proposal matter in detail. After the proposal notes were published, quite many activities for radiation protection were performed. In this professional workshop, the chronological information was collected and easily evaluated concerning with the proposal. In this presentation, the outcome was introduced.