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Lind, T.*; Kalilainen, J.*; Marchetto, C.*; Beck, S.*; Nakamura, Koichi*; Kino, Chiaki*; Maruyama, Yu; Kido, Kentaro; Kim, S. I.*; Lee, Y.*; et al.
Proceedings of 20th International Topical Meeting on Nuclear Reactor Thermal Hydraulics (NURETH-20) (Internet), p.4796 - 4809, 2023/08
Moriyama, Kiyofumi; Nakamura, Hideo; Nakamura, Koichi*
Transactions of the American Nuclear Society, 103(1), p.463 - 464, 2010/11
A computer code, Kiche, was developed at JAEA for the evaluation of the influence of radiolytic volatilization of iodine in the containment of light water reactors during an accident. It solves a chemical kinetics model including water radiolysis, reactions among iodine species, water radiolysis products, and organic compounds. The reactions and rate constants were collected from the literature. The organic iodine production model of Kiche, which was initially based on LIRIC model, was not applicable to low oxygen concentration conditions like inserted containments of BWRs. We modified the model by considering different reaction paths according to the availability of oxygen. The modified model showed improved agreement with our experimental data with various concentrations of organic impurity and oxygen.
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EVALUATING THE EFFECTIVENESS OF TRAINING FOR NUCLEAR FACILITY, 0 Pages, 1999/00
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EVALUATING THE EFFECTIVENESS OF TRAINING FOR NUCLEAR FACILITYPERSONNEL, 0 Pages, 1999/00
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Moriyama, Kiyofumi; Tashiro, Shinsuke; Chiba, Noriaki; Nakamura, Hideo; Nakamura, Koichi*
no journal, ,
Experiments were performed to measure the gaseous iodine release from aqueous CsI solution irradiated by Co-60 
-ray, to clarify the gaseous iodine behavior in the containment of light water reactors during severe accidents (SA). The influence of organic compounds with various oxygen concentrations in the gas phase were examined with pH
7 at room temperature.
Ishikawa, Jun; Sakamoto, Toru*; Moriyama, Kiyofumi; Nakamura, Hideo; Nakamura, Koichi*
no journal, ,
no abstracts in English
Moriyama, Kiyofumi; Chiba, Noriaki; Tashiro, Shinsuke; Nakamura, Hideo; Nakamura, Koichi*
no journal, ,
Regarding the organic iodine production during a severe accident of light water reactors, the organic solvent leaching from paints has drawn attention as an important organic source. We measured the amount of organic solvent leaching from epoxy paint as time series data and examined its dependence on temperature, paint thickness and age. We developed also a leach behavior model considering equilibrium between the concentrations in the paint matrix and in the solution.
Moriyama, Kiyofumi; Chiba, Noriaki; Tashiro, Shinsuke; Nakamura, Hideo; Nakamura, Koichi*
no journal, ,
no abstracts in English
Horiguchi, Naoki; Nakamura, Koichi*; Sekiguchi, Takashige*; Uesawa, Shinichiro; Himi, Masashi*; Yoshida, Hiroyuki; Nishimura, Satoshi*
no journal, ,
no abstracts in English