Ogino Haruyuki, Ichiji Takeshi, Hattori Takatoshi
Central Research Institute of Electric Power Industry, Komae, Tokyo, Japan.
Radiat Prot Dosimetry. 2012 Aug;151(1):36-42. doi: 10.1093/rpd/ncr450. Epub 2012 Jan 6.
The screening level for decontamination that has been applied for the surface of the human body and contaminated handled objects after the Fukushima nuclear accident was verified by assessing the doses that arise from external irradiation, ingestion, inhalation and skin contamination. The result shows that the annual effective dose that arises from handled objects contaminated with the screening level for decontamination (i.e. 100 000 counts per minute) is <1 mSv y(-1), which can be considered as the intervention exemption level in accordance with the International Commission on Radiological Protection recommendations. Furthermore, the screening level is also found to protect the skin from the incidence of a deterministic effect because the absorbed dose of the skin that arises from direct deposition on the surface of the human body is calculated to be lower than the threshold of the deterministic effect assuming a practical exposure duration.
通过评估外部照射、摄入、吸入和皮肤污染产生的剂量，验证了福岛核事故后应用于人体表面和受污染处理物品的去污筛选水平。结果表明，受去污筛选水平（即每分钟100000计数）污染的处理物品产生的年有效剂量<1 mSv y(-1)，根据国际放射防护委员会的建议，这可被视为干预豁免水平。此外，还发现该筛选水平可保护皮肤免受确定性效应的影响，因为假设实际暴露持续时间，计算得出直接沉积在人体表面产生的皮肤吸收剂量低于确定性效应的阈值。
