RADIOISOTOPES

Online ISSN: 1884-4111 Print ISSN: 0033-8303
RADIOISOTOPESは日本アイソトープ協会が発行する学術論文誌です
Radioisotopes 71(2): 153-160 (2022)
doi:10.3769/radioisotopes.71.153

技術報告Technical Report

福島県産日本酒のトリチウム含有可能性についての検討Analyzing Tritium Radioactivity in Nihon-shu Specialized by Fukushima Using MAgnetically Levitated Electrode Ionization Chamber

一木 博文1，迎 勝也2，満生 慎二2，川口 俊郎3Hirofumi Ichiki1, Katsuya Mukae2, Shinji Mitsuiki2, Toshirou Kawaguchi3

1 九州産業大学理工学部電気工学科Department of Electrical Engineering, Faculty of Science and Engineering, Kyushu Sangyou University

2 九州産業大学生命科学部生命科学科Department of Life Science, Faculty of Life Science, Kyushu Sangyou University

3 九州産業大学名誉教授Professor emeritus, Kyushu Sangyo University

受付日：2021年9月14日Received: September 14, 2021
受理日：2022年5月2日Accepted: May 2, 2022
発行日：2022年7月15日Published: July 15, 2022
HTMLPDFEPUB3

日本酒中のトリチウムについて放射能分析を行った。トリチウムは水素の放射性同位体でβ線エネルギーが低いため検出や除去が難しいとされている。我々は過去に差動型磁気浮上電極電離箱を用いて水蒸気化したトリチウムガスの放射能濃度を測定した。今回その結果をもとに福島県特産の日本酒を揮発させ，トリチウムが含まれると仮定した場合の放射能を直接測定した。測定の結果放射能は検出下限値を大きく下回り，推定される放射能濃度は日本およびWHOの飲料水基準を十分満たしていた。

We have conducted a radioactive survey of sake for tritium, which is the isotope of hydrogen with low β-ray energy and is considered difficult to detect and remove. Using a differential-type magnetically levitated electrode ionization chamber (MALIC) developed by Kyushu Sangyo University, we had previously measured gaseous radiation dose (ionization current) for tritium vapor. Based on the result, we analyzed Fukushima specialty sake to determine the radioactive materials and estimated the radioactivity concentration of tritium in sake. As a consequence, our device enabled direct detection at the Japanese drinking water standards level. Besides, we confirmed that the radioactivity concentration of this sake was quite far below the lower limit of the Japan and WHO drinking water standards.

Key words: tritium; Magnetically Levitated electrode Ionization Chamber; Fukushima specialized sake; HTO; Fukushima Dai-ichi Nuclear Power Plant

© Japan Radioisotope Association 2022. This is an open access article distributed under the Creative Commons Attribution 4.0 International (CC BY 4.0) License (https://creativecommons.org/licenses/by/4.0/)© Japan Radioisotope Association 2022. This is an open access article distributed under the Creative Commons Attribution 4.0 International (CC BY 4.0) License (https://creativecommons.org/licenses/by/4.0/)

This page was created on 2022-05-17T11:51:05.266+09:00
This page was last modified on 2022-06-21T11:02:53.000+09:00

このサイトは（株）国際文献社によって運用されています。