Oral presentation

[2C10-15] Decommissioning Technology for Fukushima 1

Thu. Sep 9, 2021 2:45 PM - 4:25 PM Room C

chair: Kazuya Idemitsu (Kyushu Univ.)

2:45 PM - 3:00 PM

[2C10] Fukushima Daiichi Nuclear Power Station decommissioning

燃料デブリ回収工法の現状の問題点と代替法

*Haruo Morishige¹, Yosuke Yamashiki², Yasufumi Kitamura¹ (1. Fukushima Nuclear Accident Countermeasures Review Group, 2. Kyoto Univ.)

3:00 PM - 3:15 PM

[2C11] Development of the radiation resistant remote vibration sensing device for the reactor decommissioning

*Shiro Jitsukawa¹, Kazuyuki Furuya² (1. None [former NIT Fukushima college], 2. NIT Hachinohe college)

3:15 PM - 3:30 PM

[2C12] R&D Status on a Device for Treat Hydrogen to Transport Fuel Debris at Fukushima Daiichi Nuclear Power Plant

*Tessai Sugiura^1,2, Fujio Terai^1,2, Kenji Kurihara^1,2, Yasuhiro Yuguchi² (1. IRID, 2. TOSHIBA ESS)

3:30 PM - 3:45 PM

[2C13] Development of Fuel Debris Canister

(16)Structural Verification Test using a real-size Canister

*Kohei Ono¹, Hideaki Uchiyama², Toshihiro Matsuoka³, Yasufumi Miyahara⁴, Kazuma Hirosaka¹, Yuuichi Matsushita¹, Taiichiro Yamada¹, Kenta Ogawa¹ (1. IRID/HGNE, 2. IRID, 3. IRID/MHI, 4. IRID/TOSHIBA ESS)

3:45 PM - 4:00 PM

[2C14] Development of Fuel Debris Canister

(17)Verification of prediction method of hydrogen generation by using spent nuclear fuel

*Kenta Ogawa¹, Hideaki Uchiyama², Toshihiro Matsuoka³, Yasufumi Miyahara⁴, Kazushige Ishida¹, Yuuichi Matsusita¹ (1. IRID/HGNE, 2. IRID, 3. IRID/MHI, 4. IRID/TOSHIBA ESS)

4:00 PM - 4:15 PM

[2C15] Development of Fuel Debris Canister

(18)Catalytic hydrogen recombination

*Nobuyuki Ukai¹, Hideaki Uchiyama², Yasufumi Miyahara³, Yuuichi Matsushita⁴, Toshihiro Matsuoka¹, Taisuke Tsukamoto¹, Yasuhiro Tomiita¹, Naotaka Uchimichi¹ (1. IRID/MHI, 2. IRID, 3. IRID/TOSHIBA ESS, 4. IRID/HGNE)

Time reserved for Chair （4:15 PM - 4:25 PM）

Oral presentation

[2C16-21] Decommissioning Technology for Fukushima 2

Thu. Sep 9, 2021 4:25 PM - 6:00 PM Room C

chair: Shiro Jitsukawa

4:25 PM - 4:40 PM

[2C16] Analysis of particles generated by laser processing and development of their nuclide identification methodology (5)

(1)Characteristics of fine particles from laser irradiated metal, ceramics and concrete samples

*Hiroyuki Daido^1,3, Tomonori Yamada Yamada^2,3, Chikara Ito³, Masabumi Miyabe³, Takuya Shibata³, Hiroyuki Furukawa Furukawa¹, Kaoru Inoue⁴, Ryohei Terabayashi⁴, Shuichi Hasegawa⁴ (1. Institute for Laser Technology, 2. WERC, 3. JAEA, 4. UTokyo)

4:40 PM - 4:55 PM

[2C17] Analysis of particles generated by laser processing and development of their nuclide identification methodology (5)

(2)Development of spectroscopic analysis on particles with glow discharge plasma

*Yusuke Maruyama¹, Ryohei Terabayashi¹, Kaoru Inoue¹, Masabumi Miyabe³, Hiroyuki Daido², Tomonori Yamada^3,4, Chikara Ito³, Takuya Shibata³, Shuichi Hasegawa¹ (1. UTokyo, 2. ILT, 3. JAEA, 4. WERC)

4:55 PM - 5:10 PM

[2C18] Development of Ultramicro Analysis Technology for Fuel Debris Analysis

(5)Consideration of Analytical Methods for Actinide Elements with ICP-MS/MS

*Hiroyuki Kazama¹, Yoshihiro Sekio¹, Koji Maeda¹, Kenji Konashi², Chikage Abe², Yasuyoshi Nagai², Tatsuya Suzuki³ (1. Japan Atomic Energy Agency, 2. Tohoku University, 3. Nagaoka University of Technology)

5:10 PM - 5:25 PM

[2C19] Development of ultramicro analysis technology for fuel debris analysis

(6)Preparation of simulated fuel debris

*Yusuke Miura¹, Atsushi Ohuchi¹, Toru Higuchi¹, Kenji Konashi², Yasuyoshi Nagai² (1. NFD, 2. Tohoku Univ.)

5:25 PM - 5:40 PM

[2C20] Development of ultramicro analysis technology for fuel debris analysis

(7)Study of fuel debris stability for geological disposal - Behavior of (Fe,Ce)O_x dissolution

*Kazuya Idemitsu¹, Suguru Minamihara¹, Yaohiro Inagaki¹, Tatsumi Arima¹ (1. Kyushu University)

5:40 PM - 5:55 PM

[2C21] Development of ultramicro analysis technology for fuel debris analysis

(8)Nanostructure analysis of fuel debris by TEM

*Kenta Yoshida¹, Yusuke Shimada¹, Yufeng Du¹, Hotaka Miyata¹, Toru Kitagaki², Atsushi Ohno Ikeda², Hideo Watanabe³, Kenji Konashi¹, Yasuyoshi Nagai¹ (1. Tohoku Univ., 2. JAEA, 3. Kyushu Univ.)

Time reserved for Chair （5:55 PM - 6:00 PM）

Oral presentation

[3C01-04] Decommissioning Technology for Fukushima 3

Fri. Sep 10, 2021 9:30 AM - 10:35 AM Room C

chair: Yasuyuki Nakamura (JAEA)

9:30 AM - 9:45 AM

[3C01] Study on Rational Treatment/Disposal of Contaminated Concrete Waste Considering Leaching Alteration

(1)Migration Behavior of Radioactive Iodide in Hardened Cement Paste

*Takumi Senga¹, Shinnichiro Uematsu¹, Naoko Watanabe¹, Tamotsu Kozaki¹, Yuka Morinaga², Daisuke Minato², Zyunn Nagaoka² (1. Hokkaido Univ., 2. CRIEPI)

9:45 AM - 10:00 AM

[3C02] Study on Rational Treatment/Disposal of Contaminated Concrete Waste Considering Leaching Alteration

(2)Sorption Behavior of Cs-137 on Cement Altered by Leaching Treatment

*Keisuke Matsumoto¹, Kyoya Watanabe¹, Shinichiro Uematsu¹, Naoko Watanabe¹, Tamotsu Kozaki¹, Yuka Morinaga², Daisuke Minato², Toru Nagaoka² (1. Hokkaido Univ., 2. CRIEPI)

10:00 AM - 10:15 AM

[3C03] Study on Rational Treatment/Disposal of Contaminated Concrete Waste Considering Leaching Alteration

(3)Diffusion Behavior of Cs-137 in Cement Altered by Leaching Treatment

*Kyoya Watanabe¹, Keisuke Matsumoto¹, Shinichiro Uematsu¹, Naoko Watanabe¹, Tamotsu Kozaki¹, Yuka Morinaga², Daisuke Minato², Toru Nagaoka² (1. Hokkaido Univ., 2. CRIEPI)

10:15 AM - 10:30 AM

[3C04] Study on Rational Treatment/Disposal of Contaminated Concrete Waste Considering Leaching Alteration

(4)Development of Calculation Method for Radionuclide Concentration Distribution in Concrete in Contaminated Water

*Shohei Nishino¹, Daisuke Kawasaki¹, Yanagihara Satoshi¹ (1. Univ. of Fukui)

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

Oral presentation

[3C05-07] Technologies for Dismantling, Decontamination & Evaluation 1

Fri. Sep 10, 2021 10:35 AM - 11:25 AM Room C

chair: Daisuke Kawasaki (Univ. of Fukui)

10:35 AM - 10:50 AM

[3C05] Study of possibility of clearance measurement for covered cables and control panels by detection simulation

*Masakazu Namekawa¹, Taro Shimada², Seiji Takeda² (1. NAIS, 2. JAEA)

10:50 AM - 11:05 AM

[3C06] Development of dose evaluation method for confirmation of completion of decommissioning

(1)Study on validation method for evaluated radioactivity distribution

*Taro Shimada¹, Kazuji Miwa¹, Toshihisa Sasaki², Seiji Takeda¹ (1. JAEA, 2. V.I.C.)

11:05 AM - 11:20 AM

[3C07] Development of dose evaluation method for confirmation of completion of decommissioning

(2)Evaluation method of radioactivity distribution change for safety assessment

*Kazuji Miwa¹, Masakazu Namekawa², Taro Shimada¹, Takeda Seiji¹ (1. JAEA, 2. NAIS)

Time reserved for Chair （11:20 AM - 11:25 AM）

Oral presentation

[3C08-11] Technologies for Dismantling, Decontamination & Evaluation 2

Fri. Sep 10, 2021 11:25 AM - 12:30 PM Room C

chair: Taro Shimada (JAEA)

11:25 AM - 11:40 AM

[3C08] Fundamental Study on Mechanism of Blasting Decontamination Device for Small Diameter Pipe (Part 4)

*Seigo Kai¹, Ryo Ikeda¹, 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.)

11:40 AM - 11:55 AM

[3C09] Simplification of geometry in reactor core for activation estimation using Monte Carlo code

*Takuma Noto¹, Norikazu Kinoshita¹, Kazuaki Kosako¹, Hitoshi Nakashima¹, Yuki Sasaki¹, Kazuyuki Torii¹, Tsutomu Ohtsuki², Makoto Inagaki², Shun Sekimoto² (1. Shimizu, 2. KURNS)

11:55 AM - 12:10 PM

[3C10] Risk Analysis on Schedule Slip of Radioactive Waste Treatment for Decommissioning Nuclear Power Plant

*Tatsuro Ishikuro¹, Takashi Tanaka¹, Yuuki Tsuhara¹, Satoshi Yanagihara² (1. KANDEN POWER-TECH CORPORATION, 2. UNIVERSITY OF FUKUI)

12:10 PM - 12:25 PM

[3C11] Research on Issues and Solution Ideas for Safe and Rational Decommissioning of Commercial Nuclear Power Plants

*Masaki Onodera¹, Junji Eto¹, Tomoaki Suenaga¹, Harunaga Yanagawa¹, Hiroshi Suzuki¹ (1. MRI)

Time reserved for Chair （12:25 PM - 12:30 PM）

Sessions

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

[2C10-15] Decommissioning Technology for Fukushima 1

燃料デブリ回収工法の現状の問題点と代替法

(16)Structural Verification Test using a real-size Canister

(17)Verification of prediction method of hydrogen generation by using spent nuclear fuel

(18)Catalytic hydrogen recombination

[2C16-21] Decommissioning Technology for Fukushima 2

(1)Characteristics of fine particles from laser irradiated metal, ceramics and concrete samples

(2)Development of spectroscopic analysis on particles with glow discharge plasma

(5)Consideration of Analytical Methods for Actinide Elements with ICP-MS/MS

(6)Preparation of simulated fuel debris

(7)Study of fuel debris stability for geological disposal - Behavior of (Fe,Ce)Ox dissolution

(8)Nanostructure analysis of fuel debris by TEM

[3C01-04] Decommissioning Technology for Fukushima 3

(1)Migration Behavior of Radioactive Iodide in Hardened Cement Paste

(2)Sorption Behavior of Cs-137 on Cement Altered by Leaching Treatment

(3)Diffusion Behavior of Cs-137 in Cement Altered by Leaching Treatment

(4)Development of Calculation Method for Radionuclide Concentration Distribution in Concrete in Contaminated Water

[3C05-07] Technologies for Dismantling, Decontamination & Evaluation 1

(1)Study on validation method for evaluated radioactivity distribution

(2)Evaluation method of radioactivity distribution change for safety assessment

[3C08-11] Technologies for Dismantling, Decontamination & Evaluation 2

Authentication

(7)Study of fuel debris stability for geological disposal - Behavior of (Fe,Ce)O_x dissolution