Oral presentation

[1G01-07] Thermal Hydraulic Experiment/Analysis

Wed. Sep 16, 2020 10:00 AM - 12:00 PM Room G (Zoom room 7)

Chair:Akitoshi Hotta(NRA)

10:00 AM - 10:15 AM

[1G01] Study on dispersed phase tracking method for time series 3-dimensional interface data

*Naoki Horiguchi¹, Sota Yamamura², Hiroyuki Yoshida¹, Yutaka Abe² (1. JAEA, 2. Univ. of Tsukuba)

10:15 AM - 10:30 AM

[1G02] High pressure experiment with natural circulation loop and its reproduction analysis

*Kosuke Ono¹, Yasunori Yamamoto¹, Tetsuya Takada¹ (1. Hokkaido Univ.)

10:30 AM - 10:45 AM

[1G03] Experimental evaluation of effect of non-condensable gas on cooling performance of isolation condenser

*Yasunori YAMAMOTO¹, Kosuke ONO¹, Tetsuya Takada¹ (1. Hokkaido Univ.)

10:45 AM - 11:00 AM

[1G04] Operating criteria and flow behavior of Supersonic Steam Injector

*eita koyama¹, yutaka abe¹, akiko kaneko¹, hiroyuki Yoshida² (1. University of Tsukuba, 2. JAEA)

11:00 AM - 11:15 AM

[1G05] Penetration Flow into a Branch Pipe of Mixing Tee in Relation to Thermal Fatigue Prevention

(1)Measurement Tests for Fluid Temperature

*Koji Miyoshi¹, Yoichi Utanohara¹, Masayuki Kamaya¹ (1. INSS)

11:15 AM - 11:30 AM

[1G06] Penetration Flow into a Branch Pipe of Mixing Tee in Relation to Thermal Fatigue Prevention

(2)Numerical simulations of penetration depth under actual plant conditions

*Yoichi Utanohara¹, Koji Miyoshi¹, Masayuki Kamaya¹ (1. INSS)

11:30 AM - 11:45 AM

[1G07] Development of evaluation methods for nano-micro thermophysical properties of molten salts

*Shoto Ikuta¹, Tatsumi Arima¹, Yaohiro Inagaki¹, Kazuya Idemitsu¹, Motoyasu Kinosita² (1. Kyushu Univ., 2. MOSTECH Co.)

Time reserved for Chair （11:45 AM - 12:00 PM）

Oral presentation

[1G08-11] Thermal Hydraulics of Sodium-Cooled Fast Reactors 1

Wed. Sep 16, 2020 2:45 PM - 4:00 PM Room G (Zoom room 7)

Chair:SUNGHYON JANG(Univ. of Tokyo)

2:45 PM - 3:00 PM

[1G08] Development of multi-level, multi-scenario simulation systems for sodium cooled fast reactor

(14)Overview of four-year study results

*Hiroyuki Ohshima¹, Yoshihiro Deguchi², Nobuyoshi Koga³ (1. JAEA, 2. Tokushima Univ., 3. Hiroshima Univ.)

3:00 PM - 3:15 PM

[1G09] Development of multi-level, multi-scenario simulation systems for sodium cooled fast reactor

(15)Development of multi-level simulation system

*Norihiro Doda¹, Kenji Yokoyama¹, Masaaki Tanaka¹, Takashi Takata¹, Hiroyuki Ohshima¹ (1. JAEA)

3:15 PM - 3:30 PM

[1G10] Development of multi-level, multi-scenario simulation systems for sodium cooled fast reactor

(16)Development of integrated analysis system for in- and ex-vessel phenomena

*Akihiro Uchibori¹, Mitsuhiro Aoyagi¹, Masateru Sonehara¹, Takashi Takata¹, Hiroyuki Ohshima¹ (1. JAEA)

3:30 PM - 3:45 PM

[1G11] Development of multi-level, multi-scenario simulation systems for sodium cooled fast reactor

(17)Reaction behavior evaluation based on fundamental experiments for sodium-concrete reaction

*Shin Kikuchi¹, Nobuyoshi Koga², Akikazu Kurihara¹, Takashi Takata¹, Hiroyuki Ohshima¹ (1. JAEA, 2. Hiroshima Univ.)

Time reserved for Chair （3:45 PM - 4:00 PM）

Oral presentation

[1G12-15] Thermal Hydraulics of Sodium-Cooled Fast Reactors 2

Wed. Sep 16, 2020 4:00 PM - 5:15 PM Room G (Zoom room 7)

Chair:Ayako Ono(JAEA)

4:00 PM - 4:15 PM

[1G12] Development of multi-level, multi-scenario simulation systems for sodium cooled fast reactor

(18)Physical property measurement of reaction product aerosol at sodium-oxygen reaction surface

*Yoshihiro Deguchi¹, Shin Kikuchi², Akikazu Kurihara², Takashi Takata², Hiroyuki Ohshima² (1. Tokushima University, 2. Japan Atomic Energy Agency)

4:15 PM - 4:30 PM

[1G13] Development of multi-level, multi-scenario simulation systems for sodium cooled fast reactor

(19)Experimental study on aerosol transport behavior in multi-cell facility connected with horizontal or vertical pipe

*Ryota Umeda¹, Norihiro Kikuchi¹, Akikazu Kurihara¹, Shin Kikuchi¹, Takashi Takata¹, Hiroyuki Ohshima¹ (1. JAEA)

4:30 PM - 4:45 PM

[1G14] Development of multi-level, multi-scenario simulation systems for sodium cooled fast reactor

(20)Numerical simulation of experiment on aerosol transport behavior in multi-cell facility connected with horizontal or vertical pipe

*Norihiro Kikuchi¹, Ryota Umeda¹, Shin Kikuchi¹, Akikazu Kurihara¹, Takashi Takata¹, Hiroyuki Ohshima¹ (1. JAEA)

4:45 PM - 5:00 PM

[1G15] Correlation between deformation of single molten droplet and its solidification behavior falling through coolant

*Kota Kawasaki¹, Akiko Kaneko¹, Yutaka Abe¹, Eiji Matsuo² (1. University of Tsukuba, 2. Mitsubishi FBR Systems, Inc.)

Time reserved for Chair （5:00 PM - 5:15 PM）

Oral presentation

[2G01-07] Severe Accident

Thu. Sep 17, 2020 10:00 AM - 12:00 PM Room G (Zoom room 7)

Chair:Akifumi Yamaji(Waseda Univ.)

10:00 AM - 10:15 AM

[2G01] Fuel Damage of a Reactor Core in Severe Accident

(4)Analytical Evaluation of Material Relocation in SFD 1-4 Test Using MAAP5

*Naoki Sano¹, Koji Nishida¹, Takayoshi Kusunoki¹, Michio Murase¹ (1. INSS)

10:15 AM - 10:30 AM

[2G02] Penetration Behavior of Liquid Jet Falling into a Shallow Pool

(8)Experimental Investigation of Jet behavior and Atomization Phenomena by using 3D-LIF Method

*Sota Yamamura¹, Hiroyuki Yoshida², Naoki Horiguchi², Akiko Kaneko¹, Yutaka Abe¹ (1. Univ. of Tsukuba, 2. JAEA)

10:30 AM - 10:45 AM

[2G03] Study on Spreading Behavior of Molten Core after Floor Collision with Molten Metal

*Tomomasa Ito¹, Yasunori Yamamoto¹, Nassim Sahboun¹, Shuichiro Miwa¹ (1. Hokkaido Univ.)

10:45 AM - 11:00 AM

[2G04] Debris deposition model development at JBREAK based on DEFOR-A experimental analysis

*Wataru Kikuchi¹, Akitoshi Hotta¹ (1. Nuclear Regulation Authority Division of Research for Severe Accident)

11:00 AM - 11:15 AM

[2G05] Study on characteristics of underwater high temperature melt spreading behaviorbased on PULiMS test data

*Akitoshi Hotta¹, Wataru Kikuchi¹ (1. Nuclear Regulation Authority)

11:15 AM - 11:30 AM

[2G06] Investigation on the cooling performance of spray in the spent fuel storage facility

(1)Experiments for spray water flow dynamics on BWR 9 × 9 and PWR 17 × 17 fuel bundle

*Taoizo Kanai¹, Satoshi Nishimura¹, Kenta Inagaki¹, Tomohisa Yuasa¹ (1. CRIEPI)

11:30 AM - 11:45 AM

[2G07] Investigation on the cooling performance of spray in the spent fuel storage facility

(2)Simulation of spray droplet behavior using particle method code

*KENTA INAGAKI¹, Tomohisa Yuasa¹, Taizo Kanai¹, Satoshi Nishimura¹ (1. CRIEPI)

Time reserved for Chair （11:45 AM - 12:00 PM）

Oral presentation

[2G08-12] Fukushima Daiichi NPS Accident

Thu. Sep 17, 2020 2:45 PM - 4:15 PM Room G (Zoom room 7)

Chair:Akitoshi Hotta(NRA)

2:45 PM - 3:00 PM

[2G08] Estimation of the In-Depth Debris Status of Fukushima Unit-2 and Unit-3 with Multi-Physics
Modeling

(3)Overview of the Project and Progress of the First Year

*Akifumi Yamaji¹, Masahiro Furuya¹, Yuji Ohishi², Ikken Sato³, Hirofumi Fukai¹, Xin Li¹, Hiroshi Madokoro³ (1. Waseda Univ., 2. Osaka Univ., 3. JAEA)

3:00 PM - 3:15 PM

[2G09] Estimation of the In-Depth Debris Status of Fukushima Unit-2 and Unit-3 with Multi-Physics Modeling

(4)Consideration on possible RPV-boundary failure modes of Unit 2

*IKKEN SATO¹, Akifumi Yamaji², Masahiro Furuya², Yuji Ohishi³, Xin Li², Hiroshi Madokoro¹, Hirofumi Fukai² (1. Japan Atomic Energy Agency, 2. Waseda University, 3. Osaka University)

3:15 PM - 3:30 PM

[2G10] Estimation of the In-Depth Debris Status of Fukushima Unit-2 and Unit-3 with Multi-Physics Modeling

(5)Numerical Analysis of Simulant Molten Debris Spreading and Ablation on BWR Pedestal Experiments with MPS Method

*Xin Li¹, Akifumi Yamaji¹, Guangtao Duan², Masahiro Furuya¹, Hirofumi Fukai¹, Ikken Sato³, Hiroshi Madokoro³, Yuji Ohishi⁴ (1. Waseda Univ., 2. Univ. of Tokyo, 3. JAEA, 4. Osaka Univ.)

3:30 PM - 3:45 PM

[2G11] Analysis of fission products released to environment to clarify the accident of Fukushima Daiichi Nuclear Power Station

*Masashi Himi¹, koichi Nakamura¹, Satoshi Nishimura¹, Yoko Yamane², Takashige Sekiguchi² (1. criepi, 2. Advancesoft Co.)

3:45 PM - 4:00 PM

[2G12] The effect of the molten metal amount and the outlet on corium spreading

*Ryo Yokoyama¹, Shunichi Suzuki¹, Koji Okamoto¹ (1. Univ. of Tokyo)

Time reserved for Chair （4:00 PM - 4:15 PM）

Oral presentation

[2G13-18] Fuel Assembly Thermal Hydraulics

Thu. Sep 17, 2020 4:15 PM - 6:00 PM Room G (Zoom room 7)

Chair:Yoichi Utanohara(INSS)

4:15 PM - 4:30 PM

[2G13] Research and development for understanding of liquid-film flow behavior around fuel rods in BWRs’ fuel rod bundle

(1)Overview of liquid-film thickness evaluation test and visualization of droplet entrainment

*Masaki Ikeda¹, Hajime Furuichi¹, Kiyoshi Fujimoto¹, Kenichi Katono¹, Kenichi Yasuda¹, Kazuaki Kito¹ (1. HGNE)

4:30 PM - 4:45 PM

[2G14] Research and development for understanding of liquid-film flow behavior around fuel rods in BWRs’ fuel rod bundle

(2)Feasibility study for measurement technique of liquid-film thickness distribution on a simulated fuel rod via an optical waveguide sensor

*Hajime Furuichi¹, Kiyoshi Fujimoto¹, Kenichi Katono¹, Masaki Ikeda¹, Kenichi Yasuda¹, Kazuaki Kito¹ (1. HGNE)

4:45 PM - 5:00 PM

[2G15] Development of Light Water Cooled Fast Reactor

(4)Numerical Simulation of Two-Phase Flow in a Simplified Subchannel

*Hiroyuki Yoshida¹, Ayako Ono¹, Taku Nagatake¹, Yuki Narushima², Kenichi Katono² (1. JAEA, 2. Hitachi-GE)

5:00 PM - 5:15 PM

[2G16] Research and development for understanding two-phase flow behavior inside a fuel bundle

(8)Void fraction distribution around non-heated rods in a rod bundle

*Takahiro Arai¹, Atsushi Ui¹, Masahiro Furuya¹, Riichiro Okawa ¹, Tsugumasa Iiyama¹, Shota Ueda¹, Kenetsu Shirakawa¹ (1. CRIEPI)

5:15 PM - 5:30 PM

[2G17] Effect of center-positioned unheated rod in 5x5 rod bundle on void behavior during saturated pool boiling

*Shota Ueda¹, Takahiro Arai¹, Atsushi Ui¹, Masahiro Furuya¹, Riichiro Okawa¹, Kenetsu Shirakawa¹ (1. CRIEPI)

5:30 PM - 5:45 PM

[2G18] Evaluation of swirl vanes on droplet flow passing through BWR spacer

*Riichiro OKAWA¹, Masahiro FURUYA¹, Takahiro ARAI¹, Tsugumasa IIYAMA¹ (1. CRIEPI)

Time reserved for Chair （5:45 PM - 6:00 PM）

Oral presentation

[3G01-07] Boiling, Condensation, Heat Transfer

Fri. Sep 18, 2020 10:00 AM - 12:00 PM Room G (Zoom room 7)

Chair:Shuichiro Miwa(Hokkaido Univ.)

10:00 AM - 10:15 AM

[3G01] Changes in nanoparticle layer properties near CHF

*Koki Nakano¹, Yutaro Umehara¹, Tomio Okawa¹, Yasuo Koizumi¹ (1. UEC)

10:15 AM - 10:30 AM

[3G02] Flashing phenomenon via microwave heating and influence of high dielectric constant solution

*Shohei Kobayashi¹, Utaka Abe¹, Akiko Kaneko¹, Akihiro Futsuta¹, Kouta Fujiwara¹, Tomoomi Segawa², Koichi Kawaguchi², Katsunori Ishii² (1. Univ. of Tsukuba, 2. JAEA)

10:30 AM - 10:45 AM

[3G03] Visualization observation of thermal-hydraulic phenomena near the quenching point

*Yutaro Umehara¹, Tomio Okawa¹ (1. UEC)

10:45 AM - 11:00 AM

[3G04] Condensation Heat Transfer for Downward Flows of Superheated Steam-Air Mixture in a Circular Pipe

*Michio Murase¹, Yoichi Utanohara¹, Raito Goda², Shigeo Hosokawa³, Akio Tomiyama² (1. Institute of Nuclear Safety System, Inc., 2. Kobe University, 3. Kansai University)

11:00 AM - 11:15 AM

[3G05] Study on the boiling mechanism under the high pressure region

(1)Development of the measurement technique to detect the liquid-vapor behavior vicinity of heating surface under the high pressure

*Ayako Ono¹, Manabu Yamaguchi², Hiroto Sakashita³, Shin-ichiro Uesawa¹, Mitsuhiko Shibata¹, Hiroyuki Yoshida¹ (1. JAEA, 2. Y.E.I., 3. Hokkaido Univ.)

11:15 AM - 11:30 AM

[3G06] Study on the boiling mechanism under the high pressure region

(2)Bubble growth process on visualized boiling images with semantic segmentation algorism

*Masahiro Furuya¹, Ayako Ono², Hiroyuki Yoshida² (1. Waseda Univ., 2. JAEA)

11:30 AM - 11:45 AM

[3G07] Coalesced-Bubble Lift-off Diameter in Forced Convective Subcooled Boiling

*Yuya Endo¹, Hongji Li¹, Hideki Takahashi¹, Tomio Okawa¹ (1. UEC)

Time reserved for Chair （11:45 AM - 12:00 PM）

Oral presentation

[3G08-10] Gas-liquid Two-phase Flow

Fri. Sep 18, 2020 2:45 PM - 3:40 PM Room G (Zoom room 7)

Chair:Hiroyuki Yoshida(JAEA)

2:45 PM - 3:00 PM

[3G08] Bubble Lift-off Size in Subcooled Flow Boiling for Inclined Heating Surface.

*Md Abdur Rafiq Akand¹, Kei Kitahara¹, Tatsuya Matsumoto², Wei Liu³, Koji Morita⁴ (1. Student, Kyushu Univ., 2. Asst. Professor, Kyushu Univ., 3. Assoc. Professor, Kyushu Univ., 4. Professor, Kyushu Univ.)

3:00 PM - 3:15 PM

[3G09] Evaluation of Void Fraction in Vertical Pipes under Flooding at the Upper End

*Toshiya Takaki¹, Michio Murase¹, Kosuke hayashi², Akio Tomiyama² (1. INSS, 2. Kobe Univ.)

3:15 PM - 3:30 PM

[3G10] Development of a Robust Bubble Detection Model using Deep Convolutional Neural Network

*Shuichiro Miwa¹ (1. Hokkaido University)

Time reserved for Chair （3:30 PM - 3:40 PM）

Oral presentation

[3G11-14] Liquid Droplet and Aerosol

Fri. Sep 18, 2020 3:40 PM - 4:50 PM Room G (Zoom room 7)

Chair:Masahiro Furuya(Waseda Univ.)

3:40 PM - 3:55 PM

[3G11] Visualization Study on Behavior of Entrained Droplets in a High-Speed Gas Jet into a Liquid Pool

*Masafumi Saito¹, Akiko Kaneko¹, Yutaka Abe¹, Akihiro Uchibori², Akikazu Kurihara², Takashi Takata², Hiroyuki Ohshima² (1. Univ. of Tsukuba, 2. JAEA)

3:55 PM - 4:10 PM

[3G12] Visualization of droplet entrainment caused by nucleate boiling in a liquid film

*Junpei Tabuchi¹, Yuki Narushima², Kenichi Katono², Tomio Okawa¹ (1. UEC, 2. Hitachi)

4:10 PM - 4:25 PM

[3G13] Experimental evaluation of aerosol removal behavior with gas-liquid two phase flow during pool scrubbing

*Kohei Yoshida¹, Kota Fujiwara¹, Akiko Kaneko¹, Yutaka Abe¹ (1. Univ. of Tsukuba)

4:25 PM - 4:40 PM

[3G14] Aerosol decontamination phenomena in a single bubble by pool scrubbing

*Kota Fujiwara¹, Kohei Yoshida¹, Akiko Kaneko¹, Abe Yutaka¹ (1. University of Tsukuba)

Time reserved for Chair （4:40 PM - 4:50 PM）

Sessions

III. Fission Energy Engineering » 304-1 Thermal Hydraulics, Energy Conversion, Energy Transfer, Energy Storage

[1G01-07] Thermal Hydraulic Experiment/Analysis

(1)Measurement Tests for Fluid Temperature

(2)Numerical simulations of penetration depth under actual plant conditions

[1G08-11] Thermal Hydraulics of Sodium-Cooled Fast Reactors 1

(14)Overview of four-year study results

(15)Development of multi-level simulation system

(16)Development of integrated analysis system for in- and ex-vessel phenomena

(17)Reaction behavior evaluation based on fundamental experiments for sodium-concrete reaction

[1G12-15] Thermal Hydraulics of Sodium-Cooled Fast Reactors 2

(18)Physical property measurement of reaction product aerosol at sodium-oxygen reaction surface

(19)Experimental study on aerosol transport behavior in multi-cell facility connected with horizontal or vertical pipe

(20)Numerical simulation of experiment on aerosol transport behavior in multi-cell facility connected with horizontal or vertical pipe

[2G01-07] Severe Accident

(4)Analytical Evaluation of Material Relocation in SFD 1-4 Test Using MAAP5

(8)Experimental Investigation of Jet behavior and Atomization Phenomena by using 3D-LIF Method

(1)Experiments for spray water flow dynamics on BWR 9 × 9 and PWR 17 × 17 fuel bundle

(2)Simulation of spray droplet behavior using particle method code

[2G08-12] Fukushima Daiichi NPS Accident

(3)Overview of the Project and Progress of the First Year

(4)Consideration on possible RPV-boundary failure modes of Unit 2

(5)Numerical Analysis of Simulant Molten Debris Spreading and Ablation on BWR Pedestal Experiments with MPS Method

[2G13-18] Fuel Assembly Thermal Hydraulics

(1)Overview of liquid-film thickness evaluation test and visualization of droplet entrainment

(2)Feasibility study for measurement technique of liquid-film thickness distribution on a simulated fuel rod via an optical waveguide sensor

(4)Numerical Simulation of Two-Phase Flow in a Simplified Subchannel

(8)Void fraction distribution around non-heated rods in a rod bundle

[3G01-07] Boiling, Condensation, Heat Transfer

(1)Development of the measurement technique to detect the liquid-vapor behavior vicinity of heating surface under the high pressure

(2)Bubble growth process on visualized boiling images with semantic segmentation algorism

[3G08-10] Gas-liquid Two-phase Flow

[3G11-14] Liquid Droplet and Aerosol

Authentication