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Journal Articles

Discrimination of the structures in nuclear facility station by deep learning based on 3D point cloud data

Imabuchi, Takashi; Tanifuji, Yuta; Kawabata, Kuniaki

Proceedings of 2022 IEEE/SICE International Symposium on System Integration (SII 2022) (Internet), p.1036 - 1040, 2022/01

This paper describes a method for discrimination of the structures in nuclear power station by deep learning based on 3D point cloud data. In order to promote safe and steady decommissioning work, it is important to estimate and assume the condition in nuclear power station based on the measured sensor data. Especially, the data of the dose rate in the workspace is useful to plan the decommissioning task and, the shape and the material property of the structures in the workspace are required for the dose rate simulation. Shape data can be obtained by such as 3D Scan, however, it is difficult to acquire the material property data of the objects. Therefore, we consider that it is possible that the major material property can be estimated from the category of the structures in nuclear power station. In this paper, we proposed a structure discrimination method by 3D semantic segmentation with 3D point cloud data that consists of labeled points by referring category labels of CAD data of existing nuclear facility. We reported discrimination performance of the proposed method by hold-out validation.

Journal Articles

A Learning data collection using a simulator for point cloud based identification system

Tanifuji, Yuta; Kawabata, Kuniaki

Proceedings of International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP 2020) (Internet), p.246 - 249, 2020/02

Journal Articles

Development of a GUI-based operation system for building a 3D point cloud classifier

Tanifuji, Yuta; Kawabata, Kuniaki; Hanari, Toshihide

Proceedings of 2019 IEEE Region Ten Conference (TENCON 2019) (Internet), p.36 - 40, 2019/10

Journal Articles

A Structure discrimination method by deep learning with point cloud data

Tanifuji, Yuta; Kawabata, Kuniaki

Proceedings of International Topical Workshop on Fukushima Decommissioning Research (FDR 2019) (Internet), 4 Pages, 2019/05

Journal Articles

Image reconstruction of radioactive contamination due to the Fukushima-Daiichi Nuclear Power Station Accident using a compact Compton camera

Sato, Yuki; Terasaka, Yuta; Miyamura, Hiroko; Kaburagi, Masaaki; Tanifuji, Yuta; Kawabata, Kuniaki; Torii, Tatsuo

Reactor Dosimetry; 16th International Symposium on Reactor Dosimetry (ISRD-16) (ASTM STP 1608), p.428 - 436, 2018/11

 Times Cited Count:0 Percentile:0.05

Journal Articles

Radiation imaging using a compact Compton camera inside the Fukushima Daiichi Nuclear Power Station building

Sato, Yuki; Tanifuji, Yuta; Terasaka, Yuta; Usami, Hiroshi; Kaburagi, Masaaki; Kawabata, Kuniaki; Utsugi, Wataru*; Kikuchi, Hiroyuki*; Takahira, Shiro*; Torii, Tatsuo

Journal of Nuclear Science and Technology, 55(9), p.965 - 970, 2018/09

 Times Cited Count:15 Percentile:94.46(Nuclear Science & Technology)

Journal Articles

A 3D radiation image display on a simple virtual reality system created using a game development platform

Sato, Yuki; Terasaka, Yuta; Ozawa, Shingo*; Tanifuji, Yuta; Torii, Tatsuo

Journal of Instrumentation (Internet), 13(8), p.T08011_1 - T08011_10, 2018/08

 Times Cited Count:4 Percentile:34.35(Instruments & Instrumentation)

Journal Articles

A Three-dimensional radiation image display on a real space image created via photogrammetry

Sato, Yuki; Ozawa, Shingo*; Tanifuji, Yuta; Torii, Tatsuo

Journal of Instrumentation (Internet), 13(3), p.P03001_1 - P03001_8, 2018/03

 Times Cited Count:5 Percentile:41.67(Instruments & Instrumentation)

Journal Articles

Towards enhancement of test facilities for supporting nuclear decommissioning by remote technology

Kawabata, Kuniaki; Mori, Fumiaki*; Shirasaki, Norihito; Tanifuji, Yuta; Hanari, Toshihide

Proceedings of 2017 IEEE/SICE International Symposium on System Integration (SII 2017), p.450 - 455, 2018/02

This paper describes the test facilities and experimental environments for supporting the decommissioning of the nuclear facilities especially Fukushima Daiichi Nuclear Power Station by remote operation. Naraha Remote Technology Development Center of Japan Atomic Energy Agency is an institution for such purpose. Mock-up staircase, robot testing pool and motion capture arena are already installed and full service and support began from April, 2016. We are also designing and developing some experimental environment for remotely operated robots for nuclear decommissioning. In this paper, we describe current status and development of test facilities of Naraha Remote Technology Development Center, Japan Atomic Energy Agency.

Journal Articles

Remote radiation imaging system using a compact $$gamma$$-ray imager mounted on a multicopter drone

Sato, Yuki; Ozawa, Shingo*; Terasaka, Yuta; Kaburagi, Masaaki; Tanifuji, Yuta; Kawabata, Kuniaki; Miyamura, Hiroko; Izumi, Ryo*; Suzuki, Toshikazu*; Torii, Tatsuo

Journal of Nuclear Science and Technology, 55(1), p.90 - 96, 2018/01

 Times Cited Count:24 Percentile:98.2(Nuclear Science & Technology)

Journal Articles

Development of compact Compton camera for 3D image reconstruction of radioactive contamination

Sato, Yuki; Terasaka, Yuta; Ozawa, Shingo*; Miyamura, Hiroko; Kaburagi, Masaaki; Tanifuji, Yuta; Kawabata, Kuniaki; Torii, Tatsuo

Journal of Instrumentation (Internet), 12(11), p.C11007_1 - C11007_8, 2017/11

 Times Cited Count:11 Percentile:62.65(Instruments & Instrumentation)

Journal Articles

Activities of Naraha Remote Technology and Development Center for decommissioning of Fukushima Daiichi Nuclear Power Station

Tanifuji, Yuta

Genshiryoku Nenkan 2018, p.96 - 97, 2017/10

no abstracts in English

Journal Articles

Radiation imaging system using a compact $$gamma$$-ray imager mounted on a remotely operated machine

Sato, Yuki; Kawabata, Kuniaki; Ozawa, Shingo*; Izumi, Ryo*; Kaburagi, Masaaki; Tanifuji, Yuta; Terasaka, Yuta; Miyamura, Hiroko; Kawamura, Takuma; Suzuki, Toshikazu*; et al.

IFAC-PapersOnLine, 50(1), p.1062 - 1066, 2017/07

 Times Cited Count:2 Percentile:67.06

Journal Articles

Design of test methods for remotely operated robots utilized for decommissioning tasks

Kawabata, Kuniaki; Tanifuji, Yuta; Mori, Fumiaki; Shirasaki, Norihito

Proceedings of 2017 International Congress on Advances in Nuclear Power Plants (ICAPP 2017) (CD-ROM), 4 Pages, 2017/04

This paper describes to develop test methods for evaluation of remotely operated robots and operator proficiency for nuclear emergency response and decommissioning tasks. We summarized representative robot's behaviors in the actual operations by the time analysis approach. We also examined environmental factors from the view point of the operation efficiency. Based on these examinations, we currently design some modules of the field for testing remotely operated machines. The approach and progress of the test method development are reported.

Oral presentation

Start up of Naraha Remote Technology Development Center and consideration of deployed robot operation for new standard testing method

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

no journal, , 

Oral presentation

Remote technology development for function advancement of research base, 4; Towards development of standard test method for nuclear disaster response robots

Tanifuji, Yuta; Shirasaki, Norihito; Mori, Fumiaki; Yamada, Taichi; Tsuchida, Yoshihiro; Kawabata, Kuniaki; Torii, Tatsuo; Kawatsuma, Shinji

no journal, , 

no abstracts in English

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

Towards development of test methods for remote operations in the decommissioning process

Tanifuji, Yuta; Shirasaki, Norihito; Mori, Fumiaki; Kawabata, Kuniaki

no journal, , 

This paper describes the efforts and the state of these efforts to develop test methods for evaluation of remotely operated robots. Because the radiation levels are high inside the reactor buildings at Fukushima Daiichi it is difficult for humans to work in them and remotely controlled robots must be used to do much of the decommissioning work. To select the robots for the different decommissioning tasks and to determine where the robots should be improved, a test method for analyzing and comparing robot performance is being developed. The approach and progress of the test method development are reported.

Oral presentation

Development of radiation imaging system using small-size light-weight Compton camera mounted on remotely operated machines, 1; Visualization of radioactive substances with portable Compton camera mounted on unmanned aerial vehicle

Sato, Yuki; Ozawa, Shingo*; Izumi, Ryo*; Terasaka, Yuta; Kaburagi, Masaaki; Miyamura, Hiroko; Kawamura, Takuma; Tanifuji, Yuta; Kawabata, Kuniaki; Suzuki, Toshikazu*; et al.

no journal, , 

no abstracts in English

Oral presentation

Development of modular style test field for remotely operated mobile robot

Kawabata, Kuniaki; Mori, Fumiaki; Tanifuji, Yuta; Shirasaki, Norihito; Hanari, Toshihide

no journal, , 

This paper describes about development of modular style test field for Remotely Operated Mobile Robots. Our motivation is to provide test methods for development of the robots and operator proficiency to contribute decommissioning works of Fukushima Daiichi Nuclear Power Station (FDNPS). We currently design prototypes of modular style test fields based on analysis of emergency response tasks at FDNPS and construct them. Developed prototypes including a pile-shape obstacle that is three mutually perpendicular elements, steps with iron surface, grating floor and so on were reported in this paper. Developed modules are capable of reconfiguring kinds of the test fields by arranging their layout utilizing modular mobile carts.

33 (Records 1-20 displayed on this page)