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Journal Articles

Spin excitations of the $$S$$=1/2 one-dimensional Ising-like antiferromagnet BaCo$$_{2}$$V$$_{2}$$O$$_{8}$$ in transverse magnetic fields

Okutani, Akira*; Onishi, Hiroaki; Kimura, Shojiro*; Takeuchi, Tetsuya*; Kida, Takanori*; Mori, Michiyasu; Miyake, Atsushi*; Tokunaga, Masashi*; Kindo, Koichi*; Hagiwara, Masayuki*

Journal of the Physical Society of Japan, 90(4), p.044704_1 - 044704_9, 2021/04

 Times Cited Count:0 Percentile:0(Physics, Multidisciplinary)

JAEA Reports

Risk communication activity which used "YUME Chisoukan" in the Horonobe Underground Research Center (FY 2018)

Nogami, Toshinobu; Hoshino, Masato; Tokunaga, Hiroaki*; Horikoshi, Hidehiko*

JAEA-Review 2020-005, 120 Pages, 2020/07

JAEA-Review-2020-005.pdf:4.31MB

Horonobe Underground Research Center managed by Japan Atomic Energy Agency (JAEA) is the Japan's best environment to understand the project of geological disposal of high-level radioactive waste, because there is an Underground Research Laboratory (URL) in the center besides an exhibition facility which explains the content of research conducted in the URL. In the area of the center, there is also an exhibition facility for the full-scale model of engineered barrier system of geological disposal. JAEA takes advantage of this opportunity to conduct public hearing including questionnaire research regarding the questions, anxieties and comments by the visitors for geological disposal project. This report summarizes the result of statistical analysis of 3,349 visitors from April 2018 to January 2019.

JAEA Reports

Risk communication activity which used "YUME Chisoukan" in the Horonobe Underground Research Center; FY2017

Nogami, Toshinobu; Hoshino, Masato; Tokunaga, Hiroaki*; Horikoshi, Hidehiko*

JAEA-Review 2019-004, 116 Pages, 2019/08

JAEA-Review-2019-004.pdf:6.89MB

Horonobe Underground Research Center managed by Japan Atomic Energy Agency (JAEA) is the Japan's best environment to understand the project of geological disposal of high-level radioactive waste, because there is an Underground Research Laboratory (URL) in the center besides an exhibition facility which explains the content of research conducted in the URL. In the area of the center, there is also an exhibition facility for the full-scale model of engineered barrier system of geological disposal. JAEA takes advantage of this opportunity to conduct public hearing including questionnaire research regarding the questions, anxieties and comments by the visitors for geological disposal project. This report summarizes the result of statistical analysis of 3,842 visitors from April 2017 to January 2018.

Journal Articles

Risk communication at Horonobe Underground Research Center, using the Public Information House and Underground Research Laboratory

Osawa, Hideaki; Nogami, Toshinobu; Hoshino, Masato; Tokunaga, Hiroaki*; Horikoshi, Hidehiko*

Genshiryoku Bakkuendo Kenkyu (CD-ROM), 26(1), p.45 - 55, 2019/06

Japan Atomic Energy Agency has performed risk communication at Horonobe Underground Research Center, using the Public Information House and Underground Research Laboratory (URL), to promote understanding R&D of geological disposal technology and waste disposal against public. In this paper, we conducted the analysis of questionnaire investigation performing after visiting those facilities from FY2013 to FY2017. The results show that long-term safety would gain prominent attention as agita factor by growing understanding. The results also shows that visiting to those facility would become valuable experience to understand geological disposal because, for example, respondents with visiting to URL positively evaluated necessity, appropriates and safety of geological disposal, compared with those without visiting URL.

Journal Articles

Occupation sites and valence states of Co dopants in (La, Co)-codoped M-type Sr ferrite; $$^{57}$$Fe and $$^{59}$$Co nuclear magnetic resonance studies

Sakai, Hironori; Hattori, Taisuke; Tokunaga, Yo; Kambe, Shinsaku; Ueda, Hiroaki*; Tanioku, Yasuaki*; Michioka, Chishiro*; Yoshimura, Kazuyoshi*; Takao, Kenta*; Shimoda, Aiko*; et al.

Physical Review B, 98(6), p.064403_1 - 064403_10, 2018/08

 Times Cited Count:6 Percentile:45.58(Materials Science, Multidisciplinary)

To specify preferential occupation sites of Co substituents and to clarify charge and spin states of Co ions in (La, Co)-cosubstituted hexagonal magnetoplumbite-type (M-type) Sr ferrite, $$^{57}$$Fe and $$^{59}$$Co nuclear magnetic resonance (NMR) spectra are measured under zero and external magnetic fields using powdered and single crystalline specimens. To a considerable degree, the charge compensation between La$$^{3+}$$ and Co$$^{2+}$$ works in the equal (La, Co)-codoped case, where more than half of the Co ions are considered to be present in the minority spin $$4f_1$$ sites at the center of the oxygen tetrahedra, with the $$S$$ = 3/2 state carrying a small orbital moment owing to spin-orbit interaction. The remaining small number of high-spin Co$$^{2+}$$ ($$S$$ = 3/2, $$L$$ = 1) ions with unquenched orbital moments would be distributed to the other octahedral $$12k$$, $$2a$$, and $$4f_2$$ sites.

JAEA Reports

Risk communication activity which used "YUME Chisoukan" in the Horonobe Underground Research Center; 2016

Nogami, Toshinobu; Hoshino, Masato; Tokunaga, Hiroaki*; Horikoshi, Hidehiko*; Kawabata, Kazuki*

JAEA-Review 2018-003, 151 Pages, 2018/03

JAEA-Review-2018-003.pdf:3.94MB

Horonobe Underground Research Center managed by Japan Atomic Energy Agency (JAEA) is the Japan's best environment to understand the project of geological disposal of high-level radioactive waste, because there is an Underground Research Laboratory (URL) in the center besides an exhibition facility which explains the content of research conducted in the URL. In the area of the center, there is also an exhibition facility for the full-scale model of engineered barrier system of geological disposal. JAEA takes advantage of this opportunity to conduct public hearing including questionnaire research regarding the questions, anxieties and comments by the visitors for geological disposal project. This report summarizes the result of statistical analysis of 2,795 visitors from April to November in 2016.

JAEA Reports

Risk communication activity which used "YUME Chisoukan" in the Horonobe Underground Research Center; 2015

Fujiwara, Toshiyuki; Hoshino, Masato; Tokunaga, Hiroaki*; Horikoshi, Hidehiko*

JAEA-Review 2017-008, 128 Pages, 2017/07

JAEA-Review-2017-008.pdf:8.28MB

Horonobe Underground Research Center managed by Japan Atomic Energy Agency (JAEA) is the Japan's best environment to understand the project of geological disposal of high-level radioactive waste, because there is an Underground Research Laboratory (URL) in the center besides an exhibition facility which explains the content of research conducted in the URL. In the area of the center, there is also an exhibition facility for the full-scale model of engineered barrier system of geological disposal. JAEA takes advantage of this opportunity to conduct public hearing including questionnaire research regarding the questions, anxieties and comments by the visitors for geological disposal project. This report summarizes the result of statistical analysis of 2,674 visitors from April to November in 2015.

JAEA Reports

Risk communication activity which used "YUME Chisoukan" in the Horonobe Underground Research Center; FY2014

Fujiwara, Toshiyuki; Katada, Inao; Hoshino, Masato; Tokunaga, Hiroaki*; Horikoshi, Hidehiko*

JAEA-Review 2015-035, 103 Pages, 2016/03

JAEA-Review-2015-035.pdf:5.65MB

Horonobe Underground Research Center managed by Japan Atomic Energy Agency (JAEA) is the Japan's best environment to understand the project of geological disposal of high-level radioactive waste of Japan because there is an underground research laboratory (URL) in the center besides an exhibition facility which explains the content of research conducted in the URL. In the area of the center, there is also an exhibition facility for the full-scale model of engineered barrier system of geological disposal. JAEA takes advantage of this opportunity to conduct public hearing including questionnaire research regarding the questions, anxieties and comments by the visitors for geological disposal project. This report summarizes the result of statistical analysis of 2457 comments by the visitors from April to November in 2014.

JAEA Reports

Risk communication activity which used "YUME Chisoukan" in the Horonobe Underground Research Center

Abe, Shinya; Katada, Inao; Hoshino, Masato; Tokunaga, Hiroaki*; Horikoshi, Hidehiko*

JAEA-Review 2014-034, 81 Pages, 2014/11

JAEA-Review-2014-034.pdf:8.76MB

The Horonobe Underground Research Center conducts research and development to enhance the reliability of geological disposal technology, indicate the margin of technical safety for legally decided depth of repository, improve understanding of the deep geological environment, and promote greater public understanding for geological disposal technology. "YUME chisoukan" ceased its role as an exhibition facility as of end August 2012 as part of an administrative reform under the then Democratic Party rule, and came to be focused on disclosing the underground drifts to ascertain that JAEA is true to its tripartite agreement signed between the Hokkaido Prefecture, Town of Horonobe and JAEA (i.e., no nuclear materials will be used, etc.). It is also used as the facility to provide information on the research results of the Center. This report presents the statistical results of a questionnaire (2,566 responses) conducted from April to October 2013.

JAEA Reports

Risk communication practice after the Tokyo Electric Power Company's Fukushima Daiichi Nuclear Power Plant accident; Awareness of Fukushima residents in internal dosimetry

Furuno, Akiko; Takashita, Hirofumi; Tokunaga, Hiroaki*; Horikoshi, Hidehiko*

JAEA-Review 2014-022, 37 Pages, 2014/07

JAEA-Review-2014-022.pdf:7.03MB

This paper describes an analysis of the opinion survey that is carried out at the internal dosimetry using whole body counters conducted in Japan Atomic Energy Agency. JAEA staffs explained the examination results of WBC to the residents in private booths and provide necessary advice for them. We carried out two opinion surveys at the internal dosimetry. The first survey was carried out before the screening in order to realize the residents' views of the accidents; the second survey was carried out after the personal dialogue in order to receive the evaluation from examinee for our correspondence. The first survey showed that residents' anxiety about radioactive exposure, hereditary influence on next generation, and so on. On the other hand, more than 90% residents answered in the second survey that "uneasiness reduced" as a result of the direct dialogue. Our private dialogue has also considerably effects.

Oral presentation

Irradiation experiments of high heat flux hydrogen and helium dual beams on tungsten materials

Tokunaga, Kazutoshi*; Fujiwara, Tadashi*; Ezato, Koichiro; Suzuki, Satoshi; Akiba, Masato; Kurishita, Hiroaki*; Yoshida, Naoaki*

no journal, , 

no abstracts in English

Oral presentation

Risk communication practice after the Fukushima nuclear accident, 2-4; Awareness of Fukushima residents in internal dosimetry by using whole body counters

Furuno, Akiko; Yonezawa, Rika; Tokunaga, Hiroaki*; Horikoshi, Hidehiko*; Sugiyama, Kenji; Takashita, Hirofumi

no journal, , 

Japan Atomic Energy Agency has been carrying out internal dosimetry for Fukushima residents by trust of Fukushima prefecture from July 2011. To perform result explanation on the inspection day is the merit of investigation at JAEA. As a result of analysis of the awareness of the examinee, anxiety about radiation exposure tended to be considerably reduced after inspection. The importance of the interactive communication was demonstrated.

Oral presentation

Risk communication practice after the Fukushima nuclear accident, 2-3; Awareness of Fukushima residents participating in the interactive public meeting on radiation and health

Takashita, Hirofumi; Sugiyama, Kenji; Itabashi, Kiyoshi; Tokunaga, Hiroaki*; Horikoshi, Hidehiko*

no journal, , 

As our risk communication activities after the Fukushima nuclear accident, we have conducted explanatory meetings on radiation risk and its influence on human health in Fukushima prefecture. We carried out a questionnaire survey for the participants at the meetings. We show the results of the questionnaire survey about awareness of Fukushima residents participating in the meetings.

Oral presentation

Attitude survey of residents in public meeting on radiation and in internal dosimetry

Takashita, Hirofumi; Sugiyama, Kenji; Furuno, Akiko; Gunji, Ikuko; Tokunaga, Hiroaki*; Horikoshi, Hidehiko*

no journal, , 

As our risk communication activities after the Fukushima nuclear accident, we have conducted explanatory meetings on radiation risk and its influence on human health in Ibaraki and Fukushima prefectures. We also have implemented internal dosimetry of Fukushima Residents by using whole body counters. We carried out questionnaire surveys for the participants and the examinees. Awareness of those people toward radiation, nuclear information, etc. are compared and shown.

Oral presentation

Awareness of Fukushima residents in internal dosimetry by using whole body counters, 2

Furuno, Akiko; Sugiyama, Kenji; Yonezawa, Rika; Gunji, Ikuko; Tokunaga, Hiroaki*; Horikoshi, Hidehiko*

no journal, , 

Japan Atomic Energy Agency (JAEA) has conducted internal dosimetry by using Whole Body Counter (WBC) on Fukushima residents since July 2011.

Oral presentation

Risk communication practice after the Fukushima nuclear accident, 3; Operation and development of public meeting utilizing communication team

Ayame, Junko; Sugiyama, Kenji; Takashita, Hirofumi; Yamamoto, Ryuichi; Tokunaga, Hiroaki*; Horikoshi, Hidehiko*

no journal, , 

By the nuclear mechanism, the briefing session about the influence of the radiation which thought bidirection as important in Fukushima Prefecture, etc. is carried out after the Fukushima Nuclear Power Plant disaster. For this correspondence, to the personnel (the following, communicator) dispatched to a spot, orientation etc. were carried out in advance and it has corresponded in the nuclear fuel cycle engineering laboratory. This news reports the employment of a communicator and the future deployment which have been raised based on the questionnaire result performed for the communicator after this activity also including this activity.

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