Oral presentation

[1B06-09] Decommissioning Evaluation Methods

Wed. Sep 7, 2022 2:45 PM - 3:50 PM Room B (E1 Bildg.2F No.21)

Chair:Masahiko Machida(JAEA)

2:45 PM - 3:00 PM

[1B06] A study on analysis of actual date in “FUGEN” decommissioning

*yuya kouda¹, Yukihiro iguchi², satoshi yanagihara² (1. Japan Atomic Energy Agency, 2. University of Fukui.)

3:00 PM - 3:15 PM

[1B07] A Study for the optimization of the decommissioning project of nuclear facilities

(2) Assessment of repository siting timing and interim storage strategies

*Yukihiro IGUCHI¹, Daisuke KAWASAKI¹, Satoshi YANAGIHARA¹ (1. University of Fukui)

3:15 PM - 3:30 PM

[1B08] Development of Risk Assessment Methodology for Nuclear Power Plants in Decommissioning Phase

(1) Overview of Risk Assessment and Selection of Initiating Events

*Taro Shimada¹, Tsuyoshi Sasagawa¹, Kazuji Miwa¹, Shizuka Takai¹, Seiji Takeda¹ (1. JAEA)

3:30 PM - 3:45 PM

[1B09] Development of Risk Assessment Methodology for Nuclear Power Plants in Decommissioning Phase

(2) Evaluation of the mobile radioactive contaminants

*Tsuyoshi Sasagawa¹, Taro Shimada¹, Seiji Takeda¹ (1. Japan Atomic Energy Agency)

Time reserved for Chair （3:45 PM - 3:50 PM）

Oral presentation

[1B10-15] Cutting and Decontamination

Wed. Sep 7, 2022 3:50 PM - 5:30 PM Room B (E1 Bildg.2F No.21)

Chair:Haruo Morishige(Fukushima Nuclear Accident Countermeasures Review Group)

3:50 PM - 4:05 PM

[1B10] Laser decontamination mechanism using high-speed scanning of high-power density continuous wave fiber laser and high speed camera

(1)Laser decontamination of concrete surface

*Atsushi Kosuge¹, Eisuke J. Minehara² (1. JAEA, 2. LDD Corporation)

4:05 PM - 4:20 PM

[1B11] Laser decontamination mechanism using high-speed scanning of high-power density continuous wave fiber laser and high-speed camera

(2)Laser decontamination of Epoxy resin coated thick film

*Eisuke John Minehara¹, Atsushi Kosuge² (1. LDD, 2. JAEA)

4:20 PM - 4:35 PM

[1B12] Fundamental Study on Mechanism of Blasting Decontamination Device for Small Diameter Pipe (Part 6)

*Seigo Kai¹, Hideharu Takahashi¹, Hayato Taniguchi², Akihiko Kawashima², Hiroshi Takahashi³, Keisuke Jinza⁴, Hiroshige Kikura¹ (1. Tokyo Institute of technology, 2. Shintokogio, Ltd., 3. Fuji Furukawa Engineering & Construction Co.Ltd., 4. Fuji Electric Co., Ltd.)

4:35 PM - 4:50 PM

[1B13] Research and development of lead block cutting technique for decommissioning nuclear power plants

*Tomohisa Gotou¹, Glenn Harvel², Yutaro Aoki¹, Takeyoshi Sunagawa¹ (1. FUT, 2. Ontario Tech Univ.)

4:50 PM - 5:05 PM

[1B14] Acquisition of Dust Behavior Data during Laser Cutting in a Large Water Tank

*Yuta Miyamoto¹, Hiroki Iwai¹, Norimasa Mori¹ (1. Japan Atomic Energy Agency)

5:05 PM - 5:20 PM

[1B15] Development of spectroscopic measurement techniques for laser processing

*Masabumi Miyabe¹, Yoshihiro Iwata¹, Ryohei Terabayashi², Shuichi Hasegawa² (1. JAEA, 2. The University of Tokyo)

Time reserved for Chair （5:20 PM - 5:30 PM）

Oral presentation

[2B01-05] Decommissioning of Fukushima Daiichi NPP 1

Thu. Sep 8, 2022 9:30 AM - 10:50 AM Room B (E1 Bildg.2F No.21)

Chair:Yukihiro IGUCHI(Univ. of Fukui)

9:30 AM - 9:45 AM

[2B01] Development of ultramicro analysis technology for fuel debris analysis

(9) Overview and fabrication of simulant fuel debris

*Toru Higuchi¹, Yusuke Miura¹, Atsushi Ouchi¹, Hiroyuki Kazama², Kenji Konashi³, Yasuyoshi Nagai³ (1. NFD, 2. JAEA, 3. Tohoku Univ.)

9:45 AM - 10:00 AM

[2B02] Development of ultramicro analysis technology for fuel debris analysis

(10) Mössbauer and XRD analysis of simulated fuel debris.

*Yoshiya Homma¹, Hiroyuki Kazama², Katsuya Suzuki¹, Satoru Matsuo¹, Kenta Yoshida¹, Atsushi Ohuchi³, Yusuke Miura³, Toru Higuchi³, Kenji Konashi¹, Yasuyoshi Nagai¹ (1. Tohoku Univ., 2. JAEA, 3. NFD)

10:00 AM - 10:15 AM

[2B03] Development of ultramicro analysis technology for fuel debris analysis

(11) Evaluation of grain boundary segregation in a simulated debris using AC-TEM

*Kenta Yoshida¹, Hotaka Miyata¹, Kenji Konashi¹, Yasuyoshi Nagai¹ (1. Tohoku Univ.)

10:15 AM - 10:30 AM

[2B04] Development of ultramicro analysis technology for fuel debris analysis

(12) Flowsheet of debris dissolution and nuclide separations for actinie analyses in fuel debris

*Tatsuya Suzuki¹, Zhuoran Ma¹, Fauzia Hanum Ikhwan¹, Hiroyuki Kazama², Yoshiya Homma³, Chikage Abe³, Kenji Konashi³ (1. Nagaoka University of Technology, 2. JAEA, 3. Tohoku Univ.)

10:30 AM - 10:45 AM

[2B05] Development of ultramicro analysis technology for fuel debris analysis

(13) Dissolution behaviors of simulated debris with different
uranium/zirconium ratios by using alkaline fusion method

*ZhuoRan Ma¹, Hiroyuki Kazama³, Yoshiya Homma², Kenji Konashi², Tatsuya Suzuki¹ (1. Nagaoka Univ. of Tech., 2. Tohoku Univ., 3. JAEA)

Time reserved for Chair （10:45 AM - 10:50 AM）

Oral presentation

[2B06-09] Decommissioning of Fukushima Daiichi NPP 2

Thu. Sep 8, 2022 10:50 AM - 11:55 AM Room B (E1 Bildg.2F No.21)

Chair:Taro Shimada(JAEA)

10:50 AM - 11:05 AM

[2B06] Development of ultramicro analysis technology for fuel debris analysis

(14) Uranium recovery from simulated debris solution by using TBP resin

*Fauzia Hanum Ikhwan¹, Hiroyuki Kazama², Chikage Abe³, Kenji Konashi ³, Tatsuya Suzuki¹ (1. Nagaoka Univ. Of Tech., 2. JAEA, 3. Tohoku Univ.)

11:05 AM - 11:20 AM

[2B07] Development of ultramicro analysis technology for fuel debris analysis

(15)Mutual Discrimination of Am/Cm using ICP-MS/MS

*Hiroyuki Kazama¹, Yoshihiro Sekio¹, Koji Maeda¹, Shinichi Koyama¹, Tatsuya Suzuki², Kenji Konashi³, Chikage Abe³, Yasuyoshi Nagai³ (1. JAEA, 2. Nagaoka Univ. of Tech., 3. Tohoku Univ.)

11:20 AM - 11:35 AM

[2B08] Development of ultramicro analysis technology for fuel debris analysis

(16) Study of fuel debris stability for geological disposal - Behavior of (Fe, Ce)Ox and uranium oxide dissolution

*Minamihara Suguru¹, Idemitsu Kazuya¹, Inagaki Yaohiro¹, Arima Tatsumi¹ (1. Kyushu Univ.)

11:35 AM - 11:50 AM

[2B09] Fukushima Daiichi Power Station Unit 1
About accidents caused by damage to the pedestal foundation and countermeasures

緊急対策と廃炉計画

*Haruo Morishige¹, Yasufumi Kitamura², Yosuke Yamashiki³ (1. Fukushima Nuclear Accident Countermeasures Review Group, 2. Kitamura Co., Ltd, 3. Kyoto Univ.)

Time reserved for Chair （11:50 AM - 11:55 AM）

Oral presentation

[2B10-15] Decommissioning of Fukushima Daiichi NPP 3

Thu. Sep 8, 2022 2:45 PM - 4:20 PM Room B (E1 Bildg.2F No.21)

Chair:Tatsuya Suzuki(Nagaoka Univ. of Tech.)

2:45 PM - 3:00 PM

[2B10] Development of Exposure Reduction Technologies by Digitalization of Environment and Radioactive Source Distribution

(1) Overview

*Koji Okamoto¹, Masahiro Suzuki¹, Takashi Yamaguchi¹ (1. Japan Atomic Energy Agency)

3:00 PM - 3:15 PM

[2B11] Development of Exposure Reduction Technologies by Digitalization of Environment and Radioactive Source Distribution

(2)R&D of Engines for Radioactive Source Reconstruction, Air Dose Rate Estimation, and their Visualization

*Masahiko Machida¹, Wei Shi², Susumu Yamada¹, Hiroko Nakamura Miyamura¹, Toshiaki Numata¹, Tomoki Sato¹, Yasuhiro Tobita¹, Toru Yoshida³, Yukihiro Hasegawa³, Koji Okamoto¹ (1. JAEA, 2. UTokyo, 3. RIST)

3:15 PM - 3:30 PM

[2B12] Development of Exposure Reduction Technologies by Digitalization of Environment and Radioactive Source Distribution

(3) LASSO Theory and Demonstration for Inverse Estimation on Radioactive Source Distributions

*Wei Shi¹, Masahiko Machida², Susumu Yamada², Toru Yoshida³, Yukihiro Hasegawa³, Koji Okamoto^1,2 (1. UTokyo, 2. JAEA, 3. RIST)

3:30 PM - 3:45 PM

[2B13] Development of Exposure Reduction Technologies by Digitalization of Environment and Radioactive Source Distribution

(4) Research and development of radiation sources estimation engine: Large scale analysis inside building

*Susumu Yamada¹, Yoshiaki Numata¹, Tomoaki Sato¹, Yasuhiro Tobita¹, Masahiko Machida¹, Wei Shi² (1. JAEA, 2. UTokyo)

3:45 PM - 4:00 PM

[2B14] Development of Exposure Reduction Technologies by Digitalization of Environment and Radioactive Source Distribution

(5)Research and development of Interactive Visualization Engine: Utilization of Mixed Reality

*Hiroko Nakamura Miyamura¹, Tomoki Sato¹, Yoshiaki Numata¹, Yasuhiro Tobita¹, Masahiko Machida¹ (1. JAEA)

4:00 PM - 4:15 PM

[2B15] Development of Exposure Reduction Technologies by Digitalization of Environment and Radioactive Source Distribution

(6)Computational method validation and effectiveness evaluation of an estimation system of radiation sources and dose rates

*Yuto Aoki¹, Rintaro Ito¹, Akihiro Kitamura¹, Takazumi Omori¹, Tatsuro Taniguchi¹, Hiroshi Ide¹ (1. JAEA)

Time reserved for Chair （4:15 PM - 4:20 PM）

Oral presentation

[2B16-21] Decommissioning of Fukushima Daiichi NPP 4

Thu. Sep 8, 2022 4:20 PM - 5:55 PM Room B (E1 Bildg.2F No.21)

Chair:Akihiko Nishimura(JAEA)

4:20 PM - 4:35 PM

[2B16] Development of Exposure Reduction Technologies by Digitalization of Environment and Radioactive Source Distribution

(7) Development of Fundamental Technology and System for Realizing Efficient Dose Rate Data Collection

*Kuniaki Kawabata¹, Takashi Imabuchi¹, Norihito Shirasaki¹, Rintaro Ito¹, Soichiro Suzuki¹ (1. Japan Atomic Energy Agency)

4:35 PM - 4:50 PM

[2B17] Development of Exposure Reduction Technologies by Digitalization of Environment and Radioactive Source Distribution

(8) Data measurement and nuclide discrimination at the height of the reactor building

*Shigekazu Suzuki¹, Shinji Kawatsuma¹, Keitaro Naruse², Tatsuo Torii³ (1. National Institute of Technology, Fukushima College, 2. University of Aizu, 3. Fukushima University)

4:50 PM - 5:05 PM

[2B18] Development of Exposure Reduction Technologies by Digitalization of Environment and Radioactive Source Distribution

(9) Improvement of update effciency of working environmental data by automatic synchronization

*Toshihide Hanari¹, Takashi Imabuchi¹, Yuta Tanifuji¹, Rintaro Ito¹ (1. JAEA)

5:05 PM - 5:20 PM

[2B19] Development of Exposure Reduction Technologies by Digitalization of Environment and Radioactive Source Distribution

(10) Understanding and 3D modeling of working environmental data by using deep learning

*Akio Doi¹, Meguru Yamashita¹, Hiroki Takahashi¹, Toru Kato¹, Takashi Imabuchi², Toshihide Hanari², Yuta Tanifuji², Rintaro Ito² (1. Iwate Prefectural University, 2. Japan Atomic Energy Agency)

5:20 PM - 5:35 PM

[2B20] Assessment of dust dispersion data for future safety analysis of Fukushima Daiichi fuel debris retrieval

(1)Program Overview

*Tadafumi Koyama¹, Koichi Uozumi¹, Kinya Nakamura¹, Taizo Kanai¹, Kenta Inagaki¹, Daisuke Yamauchi², Muneyuki Nakada³, Masaki Yoda⁴, Takeshi Yokoyama⁵, Keiji Iwata⁶ (1. CRIEPI, 2. TEPCO, 3. HITACHI-GE, 4. Toshiba-ESS, 5. MHI, 6. IHI)

5:35 PM - 5:50 PM

[2B21] Assessment of dust dispersion data for future safety analysis of Fukushima Daiichi fuel debris retrieval

(2) Examination of dust dispersion measurement method

*Taizo Kanai¹, Koichi Uozumi¹, Kinya Nakamura¹, Tadafumi Koyama¹, Daisuke Yamauchi², Yuichi Iwata², Kazutaka Mogi² (1. CRIEPI, 2. TEPCO HD)

Time reserved for Chair （5:50 PM - 5:55 PM）

Oral presentation

[3B01-04] Decommissioning of Fukushima Daiichi NPP 5

Fri. Sep 9, 2022 9:30 AM - 10:35 AM Room B (E1 Bildg.2F No.21)

Chair:Shinichiro Uematsu(Hokkaido Univ.)

9:30 AM - 9:45 AM

[3B01] Application of FBG sensor strain measurement technology to the gripping mechanism of a robot arm

*Akihiko Nishimura^1,3, Koji Takasaki¹, Nobuyuki Ishihara² (1. JAEA, 2. deltafiber.jp, 3. Fukui Univ.)

9:45 AM - 10:00 AM

[3B02] Current Status of ‘Development of a Hybrid Method for Evaluating the Long-Term Structural Soundness of Nuclear Reactor Buildings Using Response Monitoring and Damage Imaging Technologies - Nuclear Energy Science & Technology and Human Resource Development Project’

*Koji Dozaki¹, Takayuki Aoki¹, Masaki Maeda¹ (1. Tohoku Univ.)

10:00 AM - 10:15 AM

[3B03] Criticality control technique development for Fukushima Daiichi fuel debris

(54) Outline of study on the drying behavior of fuel debris covered with water glass based neutron absorber

*Yoichi Arai^1,2, Seiya Suzuki^1,2, Nobuo Okamura^1,2, Masayuki Watanabe^1,2, Shohei Kawano^1,3, Yoshiyuki Kawaharada^1,3 (1. IRID, 2. JAEA, 3. TOSHIBA ESS)

10:15 AM - 10:30 AM

[3B04] Criticality control technique development for Fukushima Daiichi fuel debris

(55) Evaluation for the drying behavior of fuel debris covered with water glass based neutron absorber

*Seiya Suzuki^1,2, Yoichi Arai^1,2, Nobuo Okamura^1,2, Masayuki Watanabe^1,2, Shohei kawano^1,3, Yoshiyuki Kawarada^1,3 (1. IRID, 2. JAEA, 3. TOSHIBA ESS)

Time reserved for Chair （10:30 AM - 10:35 AM）

Oral presentation

[3B05-09] Investigation of Radioactive Contamination

Fri. Sep 9, 2022 10:35 AM - 11:55 AM Room B (E1 Bildg.2F No.21)

Chair:Daisuke Kawasaki(Univ. of Fukui)

10:35 AM - 10:50 AM

[3B05] The amount of hydrogen atom present in aggregates and cement pastes

*Norikazu Kinoshita¹, Takuma Noto¹, Hitoshi Nakashima¹, Kazuaki Kosako¹, Takahiro Kato¹, Misako Kurabe¹, Yoichi Kuroiwa¹, Yuki Sasaki¹, Kazuyuki Torii¹, Mariko Segawa² (1. Shimizu, 2. JAEA)

10:50 AM - 11:05 AM

[3B06] Study on Rational Treatment/Disposal of Contaminated Concrete Waste Considering Leaching Alteration

(6)Diffusion of Acetate and Carbonate Ions in Hardened Cement Paste

*Hiromichi Koike¹, Shinichiro Uematsu¹, Naoko Watanabe¹, Tamotsu Kozaki¹, Yuka Morinaga², Daisuke Minato², Toru Nagaoka² (1. Hokkaido Univ., 2. CRIEPI)

11:05 AM - 11:20 AM

[3B07] Study on Rational Treatment/Disposal of Contaminated Concrete Waste Considering Leaching Alteration

(7) Effects of Alteration by Leaching Treatment on Diffusion Behavior of Cs-137 in Hardened Cement Paste

*Shinichiro Uematsu¹, Kyoya Watanabe¹, Naoko Watanabe¹, Tamotsu Kozaki¹, Yuka Morinaga², Daisuke Minato², Toru Nagaoka² (1. Hokkaido Univ., 2. CRIEPI)

11:20 AM - 11:35 AM

[3B08] Penetration behavior of cesium and iodine into epoxy coatings

*Daiki Fujino¹, Haruaki Matsuura¹, Isamu Sato¹, Eriko Suzuki², Kunihisa Nakajima² (1. TCU, 2. JAEA)

11:35 AM - 11:50 AM

[3B09] Development of Sr-90 analytical system based on highly sensitive laser absorption spectroscopy utilizing molecular isotope shifts (2)

*Ryohei Terabayashi¹, Kaoru Inoue¹, Masahiro Sakurai¹, Masabumi Miyabe², Shuichi Hasegawa¹ (1. UTokyo, 2. JAEA)

Time reserved for Chair （11:50 AM - 11:55 AM）

Sessions

V. Nuclear Fuel Cycle and Nuclear Materials » 505-3 Decommissioning Technology of Nuclear Facilities

[1B06-09] Decommissioning Evaluation Methods

(2) Assessment of repository siting timing and interim storage strategies

(1) Overview of Risk Assessment and Selection of Initiating Events

(2) Evaluation of the mobile radioactive contaminants

[1B10-15] Cutting and Decontamination

(1)Laser decontamination of concrete surface

(2)Laser decontamination of Epoxy resin coated thick film

[2B01-05] Decommissioning of Fukushima Daiichi NPP 1

(9) Overview and fabrication of simulant fuel debris

(10) Mössbauer and XRD analysis of simulated fuel debris.

(11) Evaluation of grain boundary segregation in a simulated debris using AC-TEM

(12) Flowsheet of debris dissolution and nuclide separations for actinie analyses in fuel debris

(13) Dissolution behaviors of simulated debris with differenturanium/zirconium ratios by using alkaline fusion method

[2B06-09] Decommissioning of Fukushima Daiichi NPP 2

(14) Uranium recovery from simulated debris solution by using TBP resin

(15)Mutual Discrimination of Am/Cm using ICP-MS/MS

(16) Study of fuel debris stability for geological disposal - Behavior of (Fe, Ce)Ox and uranium oxide dissolution

緊急対策と廃炉計画

[2B10-15] Decommissioning of Fukushima Daiichi NPP 3

(1) Overview

(2)R&D of Engines for Radioactive Source Reconstruction, Air Dose Rate Estimation, and their Visualization

(3) LASSO Theory and Demonstration for Inverse Estimation on Radioactive Source Distributions

(4) Research and development of radiation sources estimation engine: Large scale analysis inside building

(5)Research and development of Interactive Visualization Engine: Utilization of Mixed Reality

(6)Computational method validation and effectiveness evaluation of an estimation system of radiation sources and dose rates

[2B16-21] Decommissioning of Fukushima Daiichi NPP 4

(7) Development of Fundamental Technology and System for Realizing Efficient Dose Rate Data Collection

(8) Data measurement and nuclide discrimination at the height of the reactor building

(9) Improvement of update effciency of working environmental data by automatic synchronization

(10) Understanding and 3D modeling of working environmental data by using deep learning

(1)Program Overview

(2) Examination of dust dispersion measurement method

[3B01-04] Decommissioning of Fukushima Daiichi NPP 5

(54) Outline of study on the drying behavior of fuel debris covered with water glass based neutron absorber

(55) Evaluation for the drying behavior of fuel debris covered with water glass based neutron absorber

[3B05-09] Investigation of Radioactive Contamination

(6)Diffusion of Acetate and Carbonate Ions in Hardened Cement Paste

(7) Effects of Alteration by Leaching Treatment on Diffusion Behavior of Cs-137 in Hardened Cement Paste

Authentication

(13) Dissolution behaviors of simulated debris with different
uranium/zirconium ratios by using alkaline fusion method