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Journal Articles

Review of engagement activities to promote awareness of radiation and its associated risk amongst the Japanese public before and after the Fukushima Daiichi Nuclear Power Plant accident

Sakoda, Akihiro; Nomura, Naoki*; Kuroda, Yujiro*; Kono, Takahiko; Naito, Wataru*; Yoshida, Hiroko*

Journal of Radiological Protection, 41(4), p.1258 - 1287, 2021/12

Following the Fukushima Daiichi Nuclear Power Plant accident, many radiation experts directly experienced a vast gap between ideal and real public understanding (PU) of radiation in risk communication. Therefore, this study collated and reviewed information about PU activities for radiation and its risk that six Japanese academic societies - which seemed to be socially neutral expert communities - related to radiation and radiation risk conducted before and after the accident. Activities these radiation-related societies provided to general public were discussed from the following perspectives: (1) difficulties in two-way communication due to resources, motivation, public interest and concerns; (2) balance between academic research and PU activities; (3) academic societies' building trust with the public whilst ensuring member experts' neutrality and independence; (4) discussions among academic societies to prepare for public engagement. We hope that this paper encourages experts and academic societies in radiation protection to hold more national and international discussions about their roles in public communication and outreach.

Journal Articles

Panel session toward improved communication and engagement with the public after the Fukushima Daiichi Nuclear Power Plant Accident; Study reports and discussion with specialists from relevant fields

Yoshida, Hiroko*; Kuroda, Yujiro*; Kono, Takahiko; Naito, Wataru*; Sakoda, Akihiro

Journal of Radiation Protection and Research, 46(3), p.134 - 142, 2021/09

The Japan Health Physics Society established a task group on "Public Understanding after the Fukushima Daiichi Nuclear Power Plant Accident" in the 2018-2019 fiscal year. This task group collected and analyzed various activities that had been made for promotion of public understanding since the Fukushima accident, and then discussed some issues such as expert's roles. This paper outlines a panel session for this task group held at the 53rd Annual Meeting of the Japanese Health Physics Society (Online). This session consisted of (1) reporting what the task group achieved, (2) having comments by two designated experts in the fields of sociology and ethics, (3) making a panel discussion with three representatives from the task group and the two designated speakers, and (4) summarizing this session by a rapporteur.

Journal Articles

Panel session toward improved communication and engagement with publics after the Fukushima Dai-ichi Nuclear Power Plant Accident; Study reports and discussion including specialists from the relevant fields

Yoshida, Hiroko*; Kuroda, Yujiro*; Kono, Takahiko; Naito, Wataru*; Sakoda, Akihiro

Hoken Butsuri (Internet), 55(4), p.257 - 263, 2020/12

no abstracts in English

Journal Articles

Examples of practical activities related to public understanding of radiation risk following the Fukushima nuclear accident

Naito, Wataru*; Uesaka, Motoki*; Kuroda, Yujiro*; Kono, Takahiko; Sakoda, Akihiro; Yoshida, Hiroko*

Radioprotection, 55(4), p.297 - 307, 2020/10

After the Fukushima nuclear accident in Japan, a number of practical activities related to public understanding (PU) of radiation risks were implemented inside and outside Fukushima Prefecture. The various noteworthy approaches and strategies behind those practical activities have not been organized and made explicit thus far. In this study, we have organized the noteworthy practical activities related to PU of radiation risks following the Fukushima nuclear accident, and discussed them mainly from the standpoints of communication strategies and approaches. As several examples demonstrate, efforts to contextualize and localize radiation risk in various forms were observed during post-accident recovery in Fukushima, and these efforts were confirmed, through actual experiences, to be an important component of effective PU activities of radiation risks. Community-based or citizen science approaches, such as having affected residents or citizens to measure radioactivity, have contributed to the PU of radiological situations, but some challenges, such as ethical aspects and the handling of uncertainty, have also been revealed. In the era of information and communications technology, a number of citizens, experts, and agencies have made social media a popular platform for disseminating radiation risk messages to the public and have demonstrated that social media can play an important role in providing radiological risk information. The knowledge and lessons learned from the practical activities discussed in this study can be useful in enhancing PU of risks not only radiation but also other stressors such as toxic chemicals, preparing future disasters and supporting risk communication plans during recovery periods after disasters.

JAEA Reports

Inspection and repair techniques in the reactor vessel of the experimental fast reactor Joyo; Development of a high radiation resistance fiberscope (Joint research)

Naito, Hiroyuki; Itagaki, Wataru; Okazaki, Yoshihiro; Imaizumi, Kazuyuki; Ito, Chikara; Nagai, Akinori; Kitamura, Ryoichi; Shamoto, Naoki*; Takeshima, Yoshiyuki*

JAEA-Technology 2012-009, 100 Pages, 2012/05

JAEA-Technology-2012-009.pdf:9.89MB

The radiation characteristics of image fiber and light guide fiber were evaluated to develop a high radiation resistant fiberscope for the fast reactor in-vessel observation. It is known that a pure silica core fiber has a high radiation resistance and radiation resistance is influenced with impurities in silica. Moreover it is necessary to change the clad material of the light guide fiber because that of the current light guide fiber is acrylate, which is weak against radiation. Hence the improved fibers consist of a pure silica core with 1,000 ppm OH and fluorine-doped silica clad. As a result of a $$gamma$$ irradiation test, we confirm that OH inhibits the generation of the precursor by $$gamma$$ irradiation. About the clad material, we confirmed that the transmission loss of the fluorine-doped silica clad fiber is smaller than that of the acrylate clad fiber. About the mechanical strength of a fiber, we confirmed that there is no weakening the strength of the fiber and no exfoliation of the coating from the glass. In this study, we discovered the fiber which consists of a pure silica core with 1,000 ppm OH and fluorine-doped silica clad has a high radiation resistance and it is possible to observe using this fiber under the 200 $$^{circ}$$C after 5$$times$$10$$^{5}$$ Gy irradiation.

Oral presentation

Development of waste disposal system for sustainable nuclear power programme, 4; Development of methodology for optimisation of waste disposal

Makino, Hitoshi; Hioki, Kazumasa; Umeki, Hiroyuki; Sugiyama, Naoki; Ochi, Yasuhiro; Okazaki, Wataru; Naito, Morimasa; Miyahara, Kaname; Okubo, Hiroo*; Ishihara, Yoshinao*

no journal, , 

This presentation will introduce developmenmt of methodology for optimisation of waste disposal considering variation of waste charcteristics from LWR cycle and also advanced cycle.

Oral presentation

Development of radiation resistant fiberscope for inspection in reactor vessel of fast reactor, 2

Naito, Hiroyuki; Itagaki, Wataru; Ito, Chikara; Okazaki, Yoshihiro; Nagai, Akinori; Shamoto, Naoki*; Takeshima, Yoshiyuki*

no journal, , 

no abstracts in English

Oral presentation

Inspection and repair techniques in reactor vessel of sodium cooled fast reactor, 5-3; Development of radiation resistant fiberscope for inspection in reactor vessel of fast reactor, 3

Naito, Hiroyuki; Itagaki, Wataru; Ito, Chikara; Kitamura, Ryoichi; Shamoto, Naoki*; Takeshima, Yoshiyuki*

no journal, , 

no abstracts in English

Oral presentation

Inspection and repair techniques in reactor vessel of sodium cooled fast reactor, 6-2; Development of radiation resistant fiberscope for inspection in reactor vessel of fast reactor, 4

Naito, Hiroyuki; Itagaki, Wataru; Ito, Chikara; Nagai, Akinori; Kitamura, Ryoichi

no journal, , 

no abstracts in English

Oral presentation

Development of a high radiation resistance and high temperature resistance fiberscope

Naito, Hiroyuki; Itagaki, Wataru; Okazaki, Yoshihiro; Imaizumi, Kazuyuki; Kitamura, Ryoichi; Shamoto, Naoki*; Takeshima, Yoshiyuki*

no journal, , 

no abstracts in English

Oral presentation

Development of a high radiaion resistant fiberscope for sensing techniques in the reactor vessel

Naito, Hiroyuki; Itagaki, Wataru; Ito, Chikara; Imaizumi, Kazuyuki; Nagai, Akinori; Tobita, Koichi

no journal, , 

no abstracts in English

Oral presentation

Analysis of materials about radiation provided to residents after the Fukushima accident and considerations of a method to evaluate; The Efforts of SG1

Kono, Takahiko; Hattori, Takatoshi*; Yokoyama, Sumi*; Nakano, Hironori*; Sato, Noriko*; Kudo, Hiromi*; Nomura, Naoki*; Sakoda, Akihiro; Naito, Wataru*; Kuroda, Yujiro*; et al.

no journal, , 

no abstracts in English

Oral presentation

Difference in activities of some academic societies toward the society between before and after the Fukushima Accident

Sakoda, Akihiro; Nomura, Naoki*; Naito, Wataru*; Kono, Takahiko; Kuroda, Yujiro*; Yoshida, Hiroko*

no journal, , 

no abstracts in English

Oral presentation

Oral presentation

Role of radiation protection (RP) professionals in developing and fostering RP culture in general public

Yoshida, Hiroko*; Kuroda, Yujiro*; Kono, Takahiko; Naito, Wataru*; Sakoda, Akihiro; Nomura, Naoki*

no journal, , 

no abstracts in English

Oral presentation

Survey of activities of some Japanese academic societies toward the public before and after the Fukushima nuclear accident

Sakoda, Akihiro; Nomura, Naoki*; Naito, Wataru*; Kono, Takahiko; Kuroda, Yujiro*; Yoshida, Hiroko*

no journal, , 

The present study focused on radiation- or risk-associated academic societies in Japan, and collected data on experts' communication activities with the public and socially conscious activities within the societies to discuss how such experts should be in society.

Oral presentation

Working Group Session "IRPA Practical Guidance for Engagement with the Public on Radiation and Risk"

Yoshida, Hiroko*; Nomura, Naoki*; Kono, Takahiko; Sakoda, Akihiro; Kuroda, Yujiro*; Naito, Wataru*; Hirota, Seiko*; Kudo, Shinichi*; Etani, Reo*; Chikamoto, Kazuhiko*; et al.

no journal, , 

This working group has been translating into Japanese the publication "Practical Guidance for Engagement with the Public on Radiation and Risk" by IRPA in 2020. This publication was made with the theme of public understanding, which was one of key issues that the consultation by IRPA to its member societies identified as most necessary in the radiation protection system. The translated guidance is supposed to be distributed to radiation protection experts and relevant communities in Japan who may be interested in public understanding. The purpose of this symposium is to share the working progress and important points of the guidance.

Oral presentation

Activity report from IRPA Practical Guidance for Engagement with the Public on Radiation and Risk Working Group

Yoshida, Hiroko*; Nomura, Naoki*; Kono, Takahiko; Sakoda, Akihiro; Kuroda, Yujiro*; Naito, Wataru*; Hirota, Seiko*; Kudo, Shinichi*; Takahara, Shogo; Etani, Reo*; et al.

no journal, , 

The WG has translated the "Practical Guidance for Engagement with the Public on Radiation and Risk" ("IRPA Guidance") issued by the International Radiation Protection Association ("IRPA") to its member societies in 2020. "Practical Guidance for Engagement with the Public on Radiation and Risk" (hereinafter referred to as "IRPA Guidance") published by the International Radiological Protection Association (hereinafter referred to as "IRPA") in 2020 for its member societies, and to provide the information to radiation protection experts and other interested.

Oral presentation

Planning session from IRPA Practical Guidance for Engagement with the Public on Radiation and Risk Working Group

Yoshida, Hiroko*; Nomura, Naoki*; Kono, Takahiko; Sakoda, Akihiro; Kuroda, Yujiro*; Naito, Wataru*; Hirota, Seiko*; Kudo, Shinichi*; Kawaguchi, Isao*; Etani, Reo*; et al.

no journal, , 

The WG has translated the "Practical Guidance for Engagement with the Public on Radiation and Risk" ("IRPA Guidance") issued by the International Radiation Protection Association ("IRPA") to its member societies in 2020. "The content of the IRPA guidance was presented at a symposium organized by the Health Physics Society of Japan in June 2020. The content of the IRPA guidance was presented at the Health Physics Society planning symposium held in June 2020, where many experts attended and provided feedback. In this planning session, we will focus on public engagement and related specific examples and situations related to public engagement.

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