Assessment report on research and development activities in FY2014; Activity "Research and development of the technologies for Fukushima environment recovery" (Ex-post/Ex-ante evaluations)

Sector of Fukushima Research and Development

JAEA-Evaluation 2015-004, 96 Pages, 2015/09

JAEA-Evaluation-2015-004.pdf:2.95MB

Japan Atomic Energy Agency (JAEA) consulted an assessment committee, "Evaluation Committee of Research and Development Activities for Fukushima Environment" (Committee) for ex-post and ex-ante evaluations of "Research and Development of the technologies for Fukushima Environment Recovery" in accordance with national guidelines and JAEA's regulations including "General Guideline for the Evaluation of Government Research and Development (R&D) Activities" by Cabinet Office. In response to the JAEA's request, the Committee evaluated the R&D activities during the 2nd Period of Mid-Term Research Plan (from March 2011 to March 2015) as ex-post evaluation and the R&D plans during the 3rd Period of Mid- to Long-Term Research Plan (from April 2015 to March 2022) as ex-ante evaluation. The Committee evaluated the R&D activities and programs based on the explanatory materials prepared by JAEA and its oral presentations with Q&A sessions. This report presents the results of the evaluation.

Advanced volume reduction of low level radioactive solid waste

Hirabayashi, Takakuni

Energy Hum., 45, p.14 - 18, 1998/06

no abstracts in English

Remediation of contaminated forest by spent mushroom bed

Onuki, Toshihiko; Sakamoto, Fuminori; Kozai, Naofumi; Tanaka, Kenji; Namekawa, Jun; Yamasaki, Shinya*

no journal, , 

We used the spent mushroom bed, which is kinds of waste after growing edible mushrooms, for the in-situ remediation experiments in Fukushima. The results showed that the spent bed accumulates radioactive Cs not only from the contaminated soil and litter, but from throughfall.

Decontamination method using acidic electrolyzed water for metals contaminated with radioactive materials

Nakayama, Takuya

no journal, , 

Facilities that have completed their missions of research activities or have become obsolete will be systematically decommissioned. The dismantling of these facilities is expected to generate a large amount of metal waste with contaminated surfaces. In particular, a large amount of ferrous metal wastes, such as carbon steel, are generated. In order to reduce the disposal cost of radioactive wastes, it is required to reduce the volume of radioactive wastes by efficient decontamination. Therefore, as a rational decontamination method, we evaluated decontamination characteristics using acidic electrolyzed water containing hypochlorous acid, diluted hydrochloric acid, and diluted sulfuric acid on a sample simulating a corrosion layer. As a result, it was found that acidic electrolyzed water is a decontamination solution with an appropriate balance between the effects of dissolving the base metal and dissolving and removing the corrosion layer.