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JAEA Reports

Design and mounting advanced wireless communication equipment on the crawler-type robots for tasks and on the crawler-type scouting robot

Nishiyama, Yutaka; Iwai, Masaki; Tsubaki, Hirohiko; Chiba, Yusuke; Hayasaka, Toshiro*; Ono, Hayato*; Hanyu, Toshinori*

JAEA-Technology 2020-006, 26 Pages, 2020/08

JAEA-Technology-2020-006.pdf:2.43MB

Maintenance and Operation Section for Remote Control Equipment in Naraha Center for Remote Control Technology Development is the main part of the nuclear emergency response team of JAEA deal with Act on Special Measures Concerning Nuclear Emergency Preparedness. The section needs to remodel crawler-type robots for tasks, crawler-type scouting robots, and so on. About two crawler-type robots for tasks, the section designed and mounted advanced wireless communication equipment on manipulators mounted on the two robots. The crawler part of the robot has been able to be controlled by way of the new equipment, and when it is broken down, it can be changed by way of an original equipment. And the new equipment makes a single relay robot controllable both the crawler part and the manipulator part of the robot, in case of wireless relay robots being needed. And after checking the ability and characteristic about 5 wireless communication equipment, the section chose and mounted the best equipment on one crawler-type scouting robot. This report shows design and mounting advanced wireless communication equipment on the two crawler-type robots for tasks and on the one crawler-type scouting robot.

Journal Articles

Intercomparison of numerical atmospheric dispersion prediction models for emergency response to emissions of radionuclides with limited source information in the Fukushima Dai-ichi Nuclear Power Plant accident

Iwasaki, Toshiki*; Sekiyama, Tsuyoshi*; Nakajima, Teruyuki*; Watanabe, Akira*; Suzuki, Yasushi*; Kondo, Hiroaki*; Morino, Yu*; Terada, Hiroaki; Nagai, Haruyasu; Takigawa, Masayuki*; et al.

Atmospheric Environment, 214, p.116830_1 - 116830_11, 2019/10

 Times Cited Count:1 Percentile:75.66(Environmental Sciences)

The utilization of numerical atmospheric dispersion prediction (NDP) models for accidental discharge of radioactive substances was recommended by a working group of the Meteorological Society of Japan. This paper is to validate the recommendation through NDP model intercomparison in the accidental release from the Fukushima Dai-ichi Nuclear Power Plant in 2011. Emission intensity is assumed to be constant during the whole forecast period for the worst-case scenario unless time sequence of emission is available. We expect to utilize forecasts of surface air contaminations for preventions of inhalations of radioactive substances, and column-integrated amounts for mitigation of radiation exposure associated with wet deposition. Although NDP forecasts have ensemble spread, they commonly figure out relative risk in space and time. They are of great benefit to disseminating effective warnings to public without failure. The multi-model ensemble technique may be effective to improve the reliability.

Journal Articles

Dispersion modelling of radioactive materials

Nagai, Haruyasu; Yamazawa, Hiromi*

Environmental Contamination from the Fukushima Nuclear Disaster; Dispersion, Monitoring, Mitigation and Lessons Learned, p.230 - 242, 2019/08

An overview of SPEEDI is provided in the context of it development, functions, and role in the framework of nuclear emergency management. Thereafter, we examine how it was used and how it should be used for the Fukushima Daiichi Nuclear Power Station accident from a system developer perspective. We believe that our review can provide lessons or tasks for improving the prediction system and for considering better utilization of the system; it is also beneficial to consider reconstructing the framework of nuclear emergency management. Furthermore, we hope this review will prove useful in understanding and effectively using the atmospheric dispersion predictions from the system in the case of a similar accident in the future.

Journal Articles

Enhancing emergency response in the field based on analysis of workload distribution at Fukushima Daiichi Nuclear Power Station

Yoshizawa, Atsufumi*; Oba, Kyoko; Kitamura, Masaharu*

Nippon Genshiryoku Gakkai Wabun Rombunshi, 18(2), p.55 - 68, 2019/06

This study aims to improve the potential of an emergency response by analyzing the workload management during the accident at the Emergency Response Center (ERC) of TEPCO's Fukushima Daiichi Nuclear Power Plant. Specifically, the research focused on the response of the ERC during the time between the discontinuation of Unit 3 core water injection and its recovery. It identified the different types of workload at the ERC had and how they had been managed based on the record of a TV conference. It also deduced the casual factors of the responses, supplementing the interview record of the director of ERC at the time by applying workload management analysis. On the basis of these findings, lessons to enhance the potential of the on-site emergency response have been obtained for ERC and outside organizations.

Journal Articles

Preparedness and response for nuclear or radiological emergency as a designated public corporation

Okuno, Hiroshi; Okamoto, Akiko; Ebine, Noriya; Hayakawa, Tsuyoshi; Tanaka, Tadao

Proceedings of 27th International Conference on Nuclear Engineering (ICONE-27) (Internet), 15 Pages, 2019/05

In the event of a nuclear or radiological emergency, the Japan Atomic Energy Agency (JAEA) as a designated public corporation assigned in the Disaster Countermeasures Basic Act of Japan undertakes a role to support the national government and local governments. This paper (1) illuminates the roles of the JAEA as a designated public corporation for preparedness and response to a nuclear or radiological emergency of nuclear facilities; (2) summarizes emergency response activities of the JAEA in accordance with its Disaster Management Operation Plan against the off-site radiological emergencies attributed to a loss of control of the Tokyo Electric Power Company (TEPCO)'s Fukushima Daiichi Nuclear Power Station that occurred in 2011; and (3) reports its activities in normal times especially participation in the drills organized by the national government and local governments in the light of the Basic Disaster Management Plan of Japan and Local Disaster Management Plans of prefectural governments, respectively.

JAEA Reports

Annual report of Nuclear Emergency Assistance and Training Center (April 1, 2015 - March 31, 2016)

Nuclear Emergency Assistance and Training Center

JAEA-Review 2017-011, 54 Pages, 2017/07

JAEA-Review-2017-011.pdf:3.46MB

The Japan Atomic Energy Agency (JAEA) is a designated public institution under the Disaster Countermeasures Basic Act and under the Armed Attack Situations Response Act. Based on these Acts, the JAEA has the responsibility of providing technical support to the national and some local governments in case of a nuclear incident. In case of a nuclear emergency, the Nuclear Emergency Assistance and Training Center (NEAT) dispatches experts of JAEA, supplies the governments with emergency equipment, and gives them technical advice and information. In normal time, NEAT provides various drills/exercises and training courses to nuclear emergency responders. In FY2015, the NEAT accomplished the following tasks: (1) Improvement of hardware and software for technical support activities (2) Human resource development, exercise and training of nuclear emergency responders ; (3) Researches on nuclear emergency preparedness and response, and dissemination of useful information for emergency responders; (4) Arrangements for technical support for aerial monitoring; and (5) Technical contributions to Asian countries on nuclear emergency preparedness and response.

Journal Articles

Unitization for portability of emergency response surveillance robot system; Experiences and lessons learned from the deployment of the JAEA-3 emergency response robot at the Fukushima Daiichi Nuclear Power Plants

Kawatsuma, Shinji; Mimura, Ryuji; Asama, Hajime*

ROBOMECH Journal (Internet), 4, p.6_1 - 6_7, 2017/02

It was cleared that portability of emergency response reconnaissance robot had been very important. So, RESQ-A robots, which had been developed by Japan Atomic Energy Research Institute (present Japan Atomic Energy Agency), had been considered from the view point of portability. After Fukushima Daiichi NPPs' accidents occurred, JAEA had modified a RESQ-A robot to JAEA-3 robot in order to meet the anticipated situation of the accidents. However, actual situation was beyond the anticipated situation, and additional modification was required. The actual confused situation was many rubble were scattered and temporary cables and hoses were constructed in the reactor buildings, so that reconnaissance robots should be conveyed by operators through limited route, should be reassembled in short time and should be able to remove cable and tiers for reduce the operators' exposure dose during maintenance. JAEA modified again JAEA-3 robot system, with cooperation of operators from Fukushima Daiichi NPPs. It was lesson learned that emergency response reconnaissance robot needed to be unitized for portability, and "Unitization Policy for emergency response reconnaissance robot" was developed.

Journal Articles

Radiation tolerance and management method of Robots and unmanned heavy construction machines using semiconductors on the shelf

Kawatsuma, Shinji; Asama, Hajime*

Nippon Robotto Gakkai-Shi, 34(8), p.552 - 557, 2016/10

There was not a guideline available for researchers, developers or users for robots or heavy construction machines on the evaluation of radiation tolerance and management method of robots and heavy construction machines using semiconductors, like as CPUs on the shelf, under radiation condition, when Fukushima Daiichi NPPs accidents occurred on March 11th, 2011. The evaluation and the management method became necessary, in order to deploy robots like as QUINCE developing for big city accidents or unmanned heavy construction machines for landside disaster. According to "radiation tolerance data base on parts or materials" developed in 1980's to 1990's by Japan Atomic Energy Agency (JAEA), a guideline, for robots and unmanned heavy construction machines, was tentatively developed.

JAEA Reports

Annual report of Nuclear Emergency Assistance and Training Center (April 1, 2014 - March 31, 2015)

Nuclear Emergency Assistance and Training Center

JAEA-Review 2016-005, 55 Pages, 2016/05

JAEA-Review-2016-005.pdf:3.61MB

The Japan Atomic Energy Agency, JAEA, is a designated public institution under the Disaster Countermeasures Basic Act and under the Armed Attack Situations Response Act. Based on these Acts, the JAEA has the responsibility of providing technical support to the national government and/or local governments in case of nuclear and/or radiological incidents. In order to fulfill the tasks as the designated public institution, the JAEA has established the Emergency Action Plan and the Civil Protection Action Plan. In case of a nuclear/radiological emergency, the Nuclear Emergency Assistance and Training Center (NEAT) dispatches specialists of JAEA, supplies the national government and local governments with emergency equipment and materials, and gives them technical advice and information. In normal time, NEAT provides various exercises and training courses concerning nuclear preparedness and response to emergency responders including the national and local government officers, in addition to the JAEA staff members. The NEAT also researches nuclear emergency preparedness and response, and cooperates with international organizations on the above research theme. In the FY2014, the NEAT accomplished the following tasks: (1) Technical support activities as a designated public institution in cooperation with the national and local governments, (2) Human resource development, exercise and training of nuclear emergency responders for the national and local governments, (3) Researches on nuclear emergency preparedness and response, and release to the public as useful information, (4) Technical contributions to Asian countries on nuclear emergency preparedness and response in collaboration with the international organizations.

JAEA Reports

Annual report of Nuclear Emergency Assistance and Training Center (April 1, 2013 - March 31, 2014)

Sato, Takeshi; Muto, Shigeo; Akiyama, Kiyomitsu; Aoki, Kazufumi; Okamoto, Akiko; Kawakami, Takeshi; Kume, Nobuhide; Nakanishi, Chika; Koie, Masahiro; Kawamata, Hiroyuki; et al.

JAEA-Review 2014-048, 69 Pages, 2015/02

JAEA-Review-2014-048.pdf:13.91MB

JAEA was assigned as a designated public institution under the Disaster Countermeasures Basic Act and under the Armed Attack Situations Response Act. Based on these Acts, the JAEA has the responsibility of providing technical support to the national government and/or local governments in case of disaster responses or response in the event of a military attack, etc. In order to fulfill the tasks, the JAEA has established the Emergency Action Plan and the Civil Protection Action Plan. In case of a nuclear emergency, NEAT dispatches specialists of JAEA, supplies the national government and local governments with emergency equipment and materials, and gives technical advice and information. In normal time, NEAT provides various exercises and training courses concerning nuclear disaster prevention to those personnel taking an active part in emergency response institutions of the national and local governments, police, fire fighters, self-defense forces, etc. in addition to the JAEA itself. The NEAT also researches nuclear disaster preparedness and response, and cooperates with international organizations. In the FY2013, the NEAT accomplished the following tasks: (1) Technical support activities as a designated public institution in cooperation with the national and local governments, etc. (2) Human resource development, exercise and training of nuclear emergency response personnel for the national and local governments, etc. (3) Researches on nuclear disaster preparedness and response, and sending useful information (4) International contributions to Asian countries on nuclear disaster preparedness and response in collaboration with the international organizations

Journal Articles

A Real-time prediction technique of severe accident progression in containment for emergency response

Ishigami, Tsutomu; Kobayashi, Kensuke

Journal of Nuclear Science and Technology, 35(6), p.443 - 453, 1998/06

 Times Cited Count:1 Percentile:84.18(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Simulation of European tracer experiment by the emergency response system WSPEEDI; Performance of long-range dispersion model

Yamazawa, Hiromi; Chino, Masamichi

Proc. of 6th Topical Meeting on Emergency Preparedness and Response, 0, p.507 - 510, 1997/00

no abstracts in English

Journal Articles

Radiological emergency preparedness in Japan

Yamamoto, Hideaki

Proc. of IAEA/KINS Nuclear Safety Symp., 0, p.26 - 31, 1996/00

no abstracts in English

Journal Articles

Validation of COSTA on predicting core damage accident progression with the TMI-2 accident data

Ishigami, Tsutomu

Journal of Nuclear Science and Technology, 32(7), p.691 - 701, 1995/07

 Times Cited Count:2 Percentile:70.27(Nuclear Science & Technology)

no abstracts in English

Oral presentation

Development of a robot simulator for supporting to develop nuclear emergency response robots

Suzuki, Kenta; Kawabata, Kuniaki; Isowa, Mitsuru; Torii, Tatsuo

no journal, , 

Oral presentation

Start-up of Naraha Remote Technology Development Center

Kawatsuma, Shinji

no journal, , 

Japan Atomic Energy Agency has just started up NARAHA Remote Technology Development Center equipped with UUV testing pool, Mockup Stairs, Motion capture, etc. The center would support development of robots for decommissioning and emergency response. In the course of the support, JAEA is also developing Robot simulator and Standard testing method.

Oral presentation

Analysis of emergency response robots deployed for Fukushima Daiichi Nuclear Power Plants' accidents

Kawatsuma, Shinji; Kawabata, Kuniaki; Tsuchida, Yoshihiro; Tanifuji, Yuta

no journal, , 

Many robots had been deployed in the stage of emergency response for Fukushima Daiichi Nuclear Power Plants accidents. Preliminary Analysis has been done on the robots deployed during the stage of the emergency response for Fukushima Daiichi Nuclear Power Plants, in order to identify issues to be considered.

Oral presentation

Overview of system for prediction of environmental emergency dose information SPEEDI and its worldwide version WSPEEDI

Furuno, Akiko; Nagai, Haruyasu; Terada, Hiroaki; Tsuzuki, Katsunori; Nakayama, Hiromasa; Kadowaki, Masanao

no journal, , 

SPEEDI (System for Prediction of Environmental Emergency Dose Information) is a computer system that quickly predicts the atmospheric dispersion and the environmental impact of radioactive substances released into the atmosphere in a nuclear accident. During the Fukushima accident in 2011, SPEEDI calculation was executed according to the monitoring guideline by the former Nuclear Safety Commission, but prediction results were not utilized for evacuation planning by decision makers. The Nuclear Regulation Authority concluded that it is not adequate to use SPEEDI for the judgment of protective measures in emergency because it is difficult to accurately predict the timing and amount of release. However, the usefulness of SPEEDI has not been denied, and the local government can utilize SPEEDI with their own judgment and responsibility. We will also present our activities for the Fukushima accident, mainly about the release amount estimation.

Oral presentation

Role and structure of designated experts in JAEA

Togawa, Orihiko

no journal, , 

The Japan Atomic Energy Agency (JAEA) is a designated public institution under the Disaster Countermeasures Basic Act and the Armed Attack Situation Response Law. The JAEA provides technical assistance to national and local governments in case of a nuclear or radiological emergency. The Nuclear Emergency Assistance and Training Center (NEAT) is a main center of the technical assistance in case of emergency, and dispatches experts of JAEA to an off-site center etc., gives them technical advice and supplies equipment and materials. The presentation gives a role and structure of the designated experts, who provide technical assistance together with NEAT staff.

Oral presentation

Japan's perspective of advanced reactor development

Yamano, Hidemasa

no journal, , 

It is reported that a NEXIP program has been started to accelerate nuclear innovation, for which advanced reactor development is being encouraged and supported by using R&D facilities. The current status of experimental reactors of fast reactor and high temperature gas reactor in JAEA is reported. This report includes that the current emergency preparedness and response in Japan is developed according to IAEA safety guides.

21 (Records 1-20 displayed on this page)