Towards enhancing Fukushima environmental resilience

Miyahara, Kaname

Transactions of the American Nuclear Society, 117(1), p.51 - 52, 2017/10

This presentation highlights JAEA's challenges for contributing to recovering the previous life of residents and the development of resilient communities in Fukushima Prefecture based on considering needs of local people on the environmental restoration categorized by the state of evacuation orders and the lifting of such orders.

The Japan power demonstration reactor dismantling project; Radiation control

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Dekomisshoningu Giho, 0(15), p.24 - 34, 1996/12

http://www.randec.or.jp/publish/documents/gihou/Decommissioning%20gihou_15.pdf

no abstracts in English

Experimental studies on -ray dose rates from a Co cylindrical source with shell-shaped shields

*;

Nuclear Science and Engineering, 36(2), p.238 - 245, 1969/00

https://doi.org/10.13182/NSE69-A19721

Application of different orthonoraml expasion methods to neutron measurements, 2; Estimation of dose equivalent rates

Ryufuku, Hiroshi

Japanese Journal of Applied Physics, 5(10), p.910 - 913, 1966/00

https://doi.org/10.1143/JJAP.5.910

no abstracts in English

Shutdown dose rate analysis in transportation of Japanese TBM

Sato, Satoshi; Ochiai, Kentaro; Konno, Chikara; Tanigawa, Hisashi; Hirose, Takanori; Enoeda, Mikio

no journal, , 

Shutdown dose rates have been calculated for the ITER JA Water-Cooled Ceramic Breeder Test Blanket Module (WCCB-TBM) port using the partial model. The "Direct 1-Step Monte Carlo" (D1S) method is adopted for the decay -ray dose rate calculation. The decay photons are emitted from only TBM and we calculate the shutdown dose rates due to decay photons from the only TBM. Dose rates in front of the TBM in 1 month, 1 year and 1.5 year after irradiation are 300, 100 and 70 Sv/h, respectively, and they are too high. Dose rates behind the TBM in 1 month, 1 year and 1.5 year after irradiation are 5, 1 and 0.6 Sv/h, respectively, and they are also high. In future, nuclear analyses will be performed using the ITER global model.

Study on distribution and migration of radioactive substances around the Fukushima Daiichi Nuclear Power Plant, 4; Measurement of air dose rate maps by a series of car-borne surveys

Ando, Masaki; Matsuda, Norihiro; Sato, Tetsuro*; Saito, Kimiaki

no journal, , 

A series of measurements of air-dose rate has been performed with a car-borne survey system KURAMA-II over wide areas in eastern Japan since 2011 to obtain data to grasp distribution of air dose rates and the decreasing tendency. Air dose rate maps were constructed by the seven car-borne surveys. It was found that the decreasing trend of air dose rates measured through car-borne surveys was found to be more pronounced than those expected on the basis of the physical decay of radioactive cesium and of the air dose rates measured using NaI (Tl) survey meters in the areas surrounding the roadways. In addition, it was found that the extent of decrease in air dose rates was moderated through the car-borne surveys performed in 2013.

Bayesian hierarchical methods for spatiotemporal integration of radiation air dose rates

Murakami, Haruko*; Sun, D.*; Seki, Akiyuki; Takemiya, Hiroshi; Saito, Kimiaki

no journal, , 

This study presents a Bayesian hierarchical method to integrate multiple types of radiation measurements and to estimate the spatiotemporal distribution of radiation air dose rates around the Fukushima Daiichi Nuclear Power Plant. The method incorporates the temporal evolution of dose rates by separating the log-linear decay trend and the fluctuations of air dose rates which are spatially correlated based on adjacent monitoring post data.