Neutron imaging of generated water inside polymer electrolyte fuel cell using newly-developed gas diffusion layer with gas flow channels during power generation

Nasu, Mitsunori*; Yanai, Hiroshi*; Hirayama, Naoki*; Adachi, Hironori*; Kakizawa, Yu*; Shirase, Yuto*; Nishiyama, Hiromichi*; Kawamoto, Teppei*; Inukai, Junji*; Shinohara, Takenao; et al.

Journal of Power Sources, 530, p.231251_1 - 231251_11, 2022/05

https://doi.org/10.1016/j.jpowsour.2022.231251

Study on evaluation of uncertainty due to geological environment

Ijiri, Yuji*; Hattori, Hiromichi*; Suzuki, Shunichi*; Oishi, Masaya*; Kubota, Shigeru*; Adachi, Tetsuya*; Yamamoto, Takuya*

JNC TJ8400 2001-010, 143 Pages, 2001/03

JNC-TJ8400-2001-010.pdf:17.19MB

The evaluation of uncertainty of geological environment is a key issue in assessing a performance of a deep geological disposal system for high-level nuclear waste. The geological environment uncertainty is arose from data obtained from surveys and model used for a performance assessment.The objectives of this study is to develop a rational planning methodology of site characterization using the Horonobe site as a model case, and to establish a modeling methodology using the Tono site as a model case. At the Horonobe site, first, a conceptual model is constructed based on the information at every stage of site characterization procedure. A sensitivity analysis is performed using various conceptual models and data. If conceptual models uncertainty have a great impact on the result of performance assessment analysis, surveys that detect the most appropriate conceptual model are conducted in the next stage of site characterization. If data uncertainty have a great impact on the result of performance assessment analysis, surveys that decrease the data uncertainty are conducted. Thus, a rational site characterization methodology in which the most sensitive items are preferentially detected in the next stage of site characterization is developed. This concept of a rational site characterization methodology is described in this report. In addition, preliminary conceptual model is developed based on geological information around Horonobe site, and data uncertainty for the sensitivity analysis which will be conducted in next year is investigated. At the Tono site, literature on model uncertainty is surveyed, and data obtained at the Tono site is reviewed from modeling point of view.

Cold leg injection reflood test results in the SCTF core-1 under constant system pressure

Adachi, Hiromichi; Iwamura, Takamichi; Sobajima, Makoto; ; Onuki, Akira; Abe, Yutaka; Murao, Yoshio

JAERI-M 90-129, 179 Pages, 1990/08

JAERI-M-90-129.pdf:3.71MB

no abstracts in English

Analysis of SCTF/CCTF counterpart test results

Okubo, Tsutomu; Sobajima, Makoto; Iwamura, Takamichi; Onuki, Akira; Abe, Yutaka; Adachi, Hiromichi; Murao, Yoshio

JAERI-M 90-083, 155 Pages, 1990/06

JAERI-M-90-083.pdf:3.6MB

no abstracts in English

Evaluation report on SCTF core-III test S3-9; Investigation of CCTF coupling test results under an evaluation model condition in PWRs with cold-leg-injection-type ECCS

Okubo, Tsutomu; Iguchi, Tadashi; Iwamura, Takamichi; ; Onuki, Akira; Abe, Yutaka; ; Adachi, Hiromichi; Murao, Yoshio

JAERI-M 90-046, 114 Pages, 1990/03

JAERI-M-90-046.pdf:2.26MB

no abstracts in English

Evaluation report on SCTF core-III tests S3-7 and S3-8; Investigation of tie plate water temperature distribution effects on water break-through and core cooling during reflooding in PWRs with combined-injection-type ECCS

Okubo, Tsutomu; Iguchi, Tadashi; Iwamura, Takamichi; ; Onuki, Akira; Abe, Yutaka; ; ; Adachi, Hiromichi; Murao, Yoshio

JAERI-M 90-035, 143 Pages, 1990/03

JAERI-M-90-035.pdf:3.07MB

no abstracts in English

Quantitative evaluation of heat transfer enhancement due to radial power distribution during reflood phase of PWR-LOCA

Iwamura, Takamichi; Iguchi, Tadashi; Adachi, Hiromichi; Murao, Yoshio

Journal of Nuclear Science and Technology, 26(4), p.428 - 440, 1989/04

https://doi.org/10.3327/jnst.26.428

no abstracts in English

Evaluation report on SCTF core-III test S3-06; Effect of radial power distribution on thermal-hydraulic characteristics of PWR with combined injection type ECCS

Iwamura, Takamichi; Iguchi, Tadashi; ; Okubo, Tsutomu; Onuki, Akira; ; ; Adachi, Hiromichi; Murao, Yoshio

JAERI-M 88-213, 120 Pages, 1988/10

JAERI-M-88-213.pdf:2.68MB

no abstracts in English

Effect of core inlet water flow rate on reflooding phenomena in the forced feed SCTF core-I tests

Onuki, Akira; Iwamura, Takamichi; Adachi, Hiromichi

JAERI-M 88-166, 98 Pages, 1988/09

JAERI-M-88-166.pdf:2.1MB

no abstracts in English

Evaluation report on SCTF Core-III Tests S3-14,S3-15 and S3-16; Effect of radial power profile shape on two-dimensional thermal-hydraulic behavior in core

Iwamura, Takamichi; Iguchi, Tadashi; ; Okubo, Tsutomu; Onuki, Akira; ; Adachi, Hiromichi; Murao, Yoshio

JAERI-M 88-060, 150 Pages, 1988/03

JAERI-M-88-060.pdf:3.36MB

no abstracts in English