Dose Evaluation Based on 24Na Activity in the Human Body at the JCO Criticality Accident in Tokai-mura
| Autor: | Osamu Kurihara, Kunihiko Shinohara, Naomi Hayashi, Norio Tsujimura, Katsuta Kanai, Takashi Tasaki, Takumaro Momose |
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| Rok vydání: | 2001 |
| Předmět: |
Physics
Neutron dose Neutron transport Radiation Sodium Radioisotopes Health Toxicology and Mutagenesis Nuclear engineering Tokai mura Radiochemistry Radiation Dosage Neutron energy spectrum Whole-Body Counting Fast Neutrons Neutron capture Japan Criticality Humans Radiology Nuclear Medicine and imaging Neutron Radioactive Hazard Release Whole body |
| Zdroj: | Scopus-Elsevier |
| ISSN: | 1349-9157 0449-3060 |
| DOI: | 10.1269/jrr.42.s95 |
| Popis: | 24Na in the human body, activated by neutrons emitted at the JCO criticality accident, was observed for 62 subjects, where 148 subjects were measured by the whole body counter of JNC Tokai Works. The 148 subjects, including JCO employees and the contractors, residents neighboring the site and emergency service officers, were measured by the whole-body counter. The neutron-energy spectrum around the facility was calculated using neutron transport codes (ANISN and MCNP), and the relation between an amount of activated sodium in human body and neutron dose was evaluated from the calculated neutron energy spectrum and theoretical neutron capture probability by the human body. The maximum 24Na activity in the body was 7.7 kBq (83 Bq(24Na)/g(23Na)) and the relevant effective dose equivalent was 47 mSv. |
| Databáze: | OpenAIRE |
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