Oral presentation

[1D01-02] L3 Waste Disposal

Wed. Sep 16, 2020 10:00 AM - 10:35 AM Room D (Zoom room 4)

Chair:Masaki Takeda(JAEA)

10:00 AM - 10:15 AM

[1D01] Applicability of water barrier sheet to L3 trench disposal site

(1)Durability required for liner sheet

*HAJIME TAKAO¹, Taichi Saito¹, Wataru Kobayashi¹, Yuki Oooba¹ (1. JGC)

10:15 AM - 10:30 AM

[1D02] Confirmation conditions for vibrating and filling sand into the L3 waste storage container

*Yamazaki Kazutoshi¹, Hajime Takao¹, Taichi Saito¹, Atsuo Yamada² (1. JGC JAPAN CORPORATION, 2. Hazama Ando Corporation)

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

Oral presentation

[1D03-06] Field of Nuclide Migration

Wed. Sep 16, 2020 10:35 AM - 11:45 AM Room D (Zoom room 4)

Chair:HAJIME TAKAO(JGC)

10:35 AM - 10:50 AM

[1D03] Evaluation of safety function affected by long-term evolution of sealing system

(1)Identification and classification of FEPs

*Yutaka Sugita¹, Masaki Takeda¹, Hirokazu Ohno¹, Keiichiro Wakasugi², Hiroyasu Takase³, Kazuaki Mitsuyama³ (1. Japan Atomic Energy Agency, 2. Tokai University, 3. QJ Science)

10:50 AM - 11:05 AM

[1D04] Evaluation of safety function affected by long-term evolution of sealing system

(2)Scenario development

*Kazuaki Mitsuyama¹, masaki takeda², yutaka sugita², hirokazu ohno², keiichiro wakasugi³, hiroyashu takase¹, hirokazu Takase¹, hashimoto tomoko¹ (1. QJ Science, 2. JAEA, 3. Tokai Univ.)

11:05 AM - 11:20 AM

[1D05] Evaluation of safety function affected by long-term evolution of sealing system

(3)Transport modeling

*Hirokazu Takahashi¹, masaki takeda², yutaka sugita², hirokazu ohno², keiichiro wakasugi³, hiroyasu takase¹, kazuaki mitsuyama¹, tomoko hashimoto¹ (1. QJ Science Ltd., 2. Japan Atomic Energy Agency, 3. Tokai University)

11:20 AM - 11:35 AM

[1D06] An evaluation of long-term landscape evolution considering uncertainties in future sea-level change

*Shizuka Takai¹, Taro Shimada¹, Emiko Uchikoshi², Seiji Takeda¹ (1. JAEA, 2. NAIS)

Time reserved for Chair （11:35 AM - 11:45 AM）

Oral presentation

[1D07-10] Bentonite 1

Wed. Sep 16, 2020 2:45 PM - 3:55 PM Room D (Zoom room 4)

Chair:Yutaka Sugita(JAEA)

2:45 PM - 3:00 PM

[1D07] The study on selection of secondary minerals formed at bentonite-cement interface

(1)Selection approach of secondary minerals

*Tsuyoshi Sasagawa¹, Tatsuya Kijima¹, Takuma Sawaguchi¹, Yoshihisa Iida¹ (1. JAEA)

3:00 PM - 3:15 PM

[1D08] The study on selection of secondary minerals formed at bentonite-cement interface

(2)Sensitivity analyses of permeability of bentonite for set of the secondary minerals

*Tatsuya Kijima¹, Tsuyoshi Sasagawa¹, Takuma Sawaguchi¹, Yoshihisa Iida¹ (1. Japan Atomic Energy Agency)

3:15 PM - 3:30 PM

[1D09] Application of sand-mixed bentonite pellets as backfill materials

*Hitoshi Nakashima¹, Nobumitsu Takeuchi¹, Ryoji Yahagi¹, Akira Saito¹, Mitsunobu Okihara¹, Satohito Toguri¹ (1. Shimizu)

3:30 PM - 3:45 PM

[1D10] Permeability tests of backfill material with crushed rock and bentonite pellets

*Mitsunobu Okihara¹, Hitoshi Nakashima¹, Ryoji Yahagi¹, Akira Saito¹, Satohito Toguri¹ (1. Shimizu)

Time reserved for Chair （3:45 PM - 3:55 PM）

Oral presentation

[1D11-14] Bentonite 2

Wed. Sep 16, 2020 3:55 PM - 5:05 PM Room D (Zoom room 4)

Chair:Mitsunobu Okihara(Shimizu Corporation)

3:55 PM - 4:10 PM

[1D11] Diffusion behavior of radionuclides in natural bentonite samples with different properties

*Hiroto Sato¹, Shinichiro Uematsu², Naoko Watanabe², Tamotsu Kozaki², Toru Nagaoka³, Takahiro Goto⁴ (1. Graduate School of Engineering Hokkaido Univ., 2. Faculty of Engineering Hokkaido Univ., 3. CRIEPI, 4. NUMO)

4:10 PM - 4:25 PM

[1D12] Study on sealing performance cut off excavation damaged zone with clay-based materials

(1)Measurement of properties of bentonite in laboratory tests

*Shun Kimura¹, Masaki Takeda¹, Hanae Dan², Takayuki Motoshima² (1. JAEA, 2. TAISEI)

4:25 PM - 4:40 PM

[1D13] Study on sealing performance cut off excavation damaged zone with clay-based materials

(2)Evaluation of permeability based on in-situ experiment

*Masaki Takeda¹, Shun Kimura¹, Takayuki Motoshima², Hanae Dan² (1. JAEA, 2. TAISEI)

4:40 PM - 4:55 PM

[1D14] Study on sealing performance cut off excavation damaged zone with clay-based materials

(3)Evaluation of permeability based on groundwater flow analysis

*Hanae Dan¹, Takayuki Motoshima¹, Shun Kimura², Masaki Takeda² (1. TAISEI, 2. JAEA)

Time reserved for Chair （4:55 PM - 5:05 PM）

Oral presentation

[2D01-02] Analysis Method

Thu. Sep 17, 2020 10:00 AM - 10:35 AM Room D (Zoom room 4)

Chair:Tsutomu Sato(Hokkaido Univ)

10:00 AM - 10:15 AM

[2D01] Characterization and solubility of mixed lanthanide oxides, (L₁,L₂)₂O₃
(L₁, L₂ = La, Nd, Eu, Tm)

*Md Moniruzzaman¹, Taishi Kobayashi¹, Takayuki Sasaki¹ (1. Graduate School of Engineering, Kyoto University)

10:15 AM - 10:30 AM

[2D02] Development of high-sensitive analysis of U(VI) by ultra-low temperature TRLFS

*Takumi Saito¹, Noboru Aoyagi², Huiyang Mei¹ (1. The University of Tokyo, 2. JAEA)

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

Oral presentation

[2D03-06] Waste

Thu. Sep 17, 2020 10:35 AM - 11:45 AM Room D (Zoom room 4)

Chair:Takumi Saito(Univ. of Tokyo)

10:35 AM - 10:50 AM

[2D03] Technical options of radioactive waste management for the second half of the 21st Century, in consideration of Pu utilization and less environmentally impacted geological disposal

(17)Study on the reduction of foot-print of geological repository by combination of time factors in backend process and waste emplacements at geological repository

*Tomohiro Okamura¹, Eriko Minari¹, Masahiko Nakase¹, Tomohumi Sakuragi², Hidekazu Asano^1,2, Kenji Takeshita¹ (1. Tokyo Tech, 2. RWMC)

10:50 AM - 11:05 AM

[2D04] Encapsulation mechanisms of Cs and Sr in spent adsorbents by alkali activated materials

*Tsutomu Sato¹, Soonthornwiphat Natatsawas², Chaerun Rislam², Yutaro Kobayashi², Kazuma Kuroda², Kanako Toda², Tsubasa Otake¹, Elakneswaran Yogarajah¹, John Provis³ (1. Faculty of Engineering, Hokkaido University, 2. Graduate School of Engineering, Hokkaido University, 3. The University of Shefield )

11:05 AM - 11:20 AM

[2D05] Solubility of palladium in the presence of α-isosaccharinic acid

*Shunsuke Miyabe¹, Mamiko Maeno¹, Kazuhito Matsubara¹, Kaoru Tomiyasu¹, Chiari Ogami¹, Akira Kitamura², Shingo Kimuro² (1. Kyudensangyo, 2. JAEA)

11:20 AM - 11:35 AM

[2D06] Numerical simulation on movement and shielding of radioactive Cs in concrete materials

*Chisato Noma¹, Haruo Sato¹ (1. Okayama University Graduate School bof Science and Technology)

Time reserved for Chair （11:35 AM - 11:45 AM）

Sessions

V. Nuclear Fuel Cycle and Nuclear Materials » 505-2 Waste Disposal and Its Environmental Aspects

[1D01-02] L3 Waste Disposal

[1D01] Applicability of water barrier sheet to L3 trench disposal site

(1)Durability required for liner sheet

[1D02] Confirmation conditions for vibrating and filling sand into the L3 waste storage container

[1D03-06] Field of Nuclide Migration

[1D03] Evaluation of safety function affected by long-term evolution of sealing system

(1)Identification and classification of FEPs

[1D04] Evaluation of safety function affected by long-term evolution of sealing system

(2)Scenario development

[1D05] Evaluation of safety function affected by long-term evolution of sealing system

(3)Transport modeling

[1D06] An evaluation of long-term landscape evolution considering uncertainties in future sea-level change

[1D07-10] Bentonite 1

[1D07] The study on selection of secondary minerals formed at bentonite-cement interface

(1)Selection approach of secondary minerals

[1D08] The study on selection of secondary minerals formed at bentonite-cement interface

(2)Sensitivity analyses of permeability of bentonite for set of the secondary minerals

[1D09] Application of sand-mixed bentonite pellets as backfill materials

[1D10] Permeability tests of backfill material with crushed rock and bentonite pellets

[1D11-14] Bentonite 2

[1D11] Diffusion behavior of radionuclides in natural bentonite samples with different properties

[1D12] Study on sealing performance cut off excavation damaged zone with clay-based materials

(1)Measurement of properties of bentonite in laboratory tests

[1D13] Study on sealing performance cut off excavation damaged zone with clay-based materials

(2)Evaluation of permeability based on in-situ experiment

[1D14] Study on sealing performance cut off excavation damaged zone with clay-based materials

(3)Evaluation of permeability based on groundwater flow analysis

[2D01-02] Analysis Method

[2D01] Characterization and solubility of mixed lanthanide oxides, (L₁,L₂)₂O₃
(L₁, L₂ = La, Nd, Eu, Tm)

[2D02] Development of high-sensitive analysis of U(VI) by ultra-low temperature TRLFS

[2D03-06] Waste

[2D03] Technical options of radioactive waste management for the second half of the 21st Century, in consideration of Pu utilization and less environmentally impacted geological disposal

(17)Study on the reduction of foot-print of geological repository by combination of time factors in backend process and waste emplacements at geological repository

[2D04] Encapsulation mechanisms of Cs and Sr in spent adsorbents by alkali activated materials

[2D05] Solubility of palladium in the presence of α-isosaccharinic acid

[2D06] Numerical simulation on movement and shielding of radioactive Cs in concrete materials

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