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Establishment of a Laboratory for $$gamma$$-ray Spectrometry of Environmental Samples Collected in Fukushima

福島の環境試料を対象とした$$gamma$$線スペクトロメトリ用分析施設の構築

三枝 純; 依田 朋之; 前田 智史; 岡崎 勤; 大谷 周一; 山口 敏夫; 栗田 義幸; 波澄 篤; 米澤 仲四郎*; 武石 稔

Saegusa, Jun; Yoda, Tomoyuki; Maeda, Satoshi; Okazaki, Tsutomu; Otani, Shuichi; Yamaguchi, Toshio; Kurita, Yoshiyuki; Hasumi, Atsushi; Yonezawa, Chushiro*; Takeishi, Minoru

2011年3月の福島第一原子力発電所の事故後、原子力機構は新たに放射能分析施設を福島に立ち上げた。分析施設では高分解能$$gamma$$線スペクトロメトリに基づき、土壌や水、ダストフィルタ、植物といった環境試料の放射能分析を月当たり約1,000件のペースで行っている。2012年9月の施設立上げ以来、分析結果の信頼性や、分析依頼者及び機器オペレータの利便性向上を目指した技術開発を実施し、制度的・技術的な課題を継続的に改善することで、ISO/IEC 17025規格に適合する試験所としての認定を得た。

After the nuclear accident at the Fukushima Daiichi Nuclear Power Plant in March 2011, the Japan Atomic Energy Agency has newly set up a laboratory for radioactivity analysis in Fukushima. At the laboratory, radioactivity concentrations of environmental samples such as soil, water, dust filter, plant, etc., approximately 1,000 samples in a month, are measured with high-resolution $$gamma$$-ray spectrometry systems. The systems employ n-type HPGe detectors from Ortec. Since September 2012, characterization and upgrade of the systems have been performed aimed at enhancing reliability of analysis and convenience of customers. Resolving both systematic and technical issues, the laboratory has been accredited the ISO/IEC 17025 standard as a testing laboratory for radioactivity analysis.

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