Atomic Energy Society of Japan "2023 Spring Annual Meeting", "Sigma" Investigative Committee and Nuclear Data Division Joint Session, 60th Anniversary of Investigation Committee for Nuclear Data; All Japan Endeavor for Nuclear Data Activities, 1; 60 Years of Investigation Committee for Nuclear Data

Fukahori, Tokio

Kaku Deta Nyusu (Internet), (135), p.19 - 25, 2023/06

Initially, the Sigma Committee consisted of two sides of the same coin: the Atomic Energy Society of Japan (AESJ) Sigma Special Committee and the Japan Atomic Energy Research Institute (JAERI) Sigma Research Committee. It is original the Sigma Committee conducts actual work such as research, evaluation and evaluation of nuclear data (including measurement, called "nuclear data activity") rather than a "place for examination" that can be felt from the sense of the word "committee". At present, the AESJ's Investigation Committee of Nuclear Data and the JAEA's JENDL Committee are working independently, and the JENDL Committee has taken over the actual work of producing nuclear data files. On the occasion of the 60th anniversary of the Sigma Committee, we have reviewed its progress and historical description so far given in the references.

Estimation of I-131 concentration using time history of pulse height distribution at monitoring post and detector response for radionuclide in plume

Hirayama, Hideo*; Kawasaki, Masatsugu; Matsumura, Hiroshi*; Okura, Takehisa; Namito, Yoshihito*; Sanami, Toshiya*; Taki, Mitsumasa; Oishi, Tetsuya; Yoshizawa, Michio

Insights Concerning the Fukushima Daiichi Nuclear Accident, Vol.4; Endeavors by Scientists, p.295 - 307, 2021/10

Estimation of I-131 concentration using time history of pulse height distribution at monitoring post and detector response for radionuclide in plume

Hirayama, Hideo*; Kawasaki, Masatsugu; Matsumura, Hiroshi*; Okura, Takehisa; Namito, Yoshihito*; Sanami, Toshiya*; Taki, Mitsumasa; Oishi, Tetsuya; Yoshizawa, Michio

Nihon Genshiryoku Gakkai Wabun Rombunshi, 13(3), p.119 - 126, 2014/09

https://doi.org/10.3327/taesj.J14.006

A method of deducing the I-131 concentration in a radioactive plume from the time history of peak count rates determined from pulse height spectra obtained from an NaI(Tl)scintillation detector employed as a detector of a monitoring post was presented. The concentrations of I-131 in the plumes were estimated from the count rates using the calculated response of the NaI(Tl) detector with egs5 for a model of a plume uniformly containing I-131. This method was applied to the data from the monitoring posts at Nuclear Science Research Institutes of Japan Atomic Energy Agency (JAEA). The estimated time history variation of I-131 concentrations in plumes was in fair agreement with those measured directly by an air sampling method. The difference was less than a factor of 4 for plumes that arrived on March 15 and March 21, indicating relatively high I-131 concentrations among the plumes studied in this work.

Estimation of spent fuel compositions from light water reactors

Ando, Yoshihira*; Nishihara, Kenji; Takano, Hideki

Journal of Nuclear Science and Technology, 37(10), p.924 - 933, 2000/10

https://doi.org/10.3327/jnst.37.924

no abstracts in English

Current trend and future prospect of nuclear instruments in industrial radioisotope applications

Radioisotopes, 33(2), p.100 - 108, 1984/00

https://doi.org/10.3769/radioisotopes.33.2_100

no abstracts in English

Estimation of irradiation history of a spent fuel by gamma-ray spectroscopy

Tasaka, Kanji

Nuclear Technology, 29(2), p.239 - 248, 1976/02

https://doi.org/10.13182/NT76-A31583

no abstracts in English

Experience of waste management in decommissioning of FUGEN

Tezuka, Masashi

no journal, , 

Regarding the disposal of radioactive waste, Japan Nuclear Fuel already operates a repository for commercial reactor at Rokko, and waste materials such as research facilities are under consideration by JAEA, the implementing entity. In Fugen under decommissioning, the dismantled waste is separated and managed according to the radioactivity level classification, type, lineage, etc., and the waste management system is used to manage the history.