2000 Fiscal Year Annual Research Report

臨界事故の環境影響に関する学術調査研究

Research Project

Project/Area Number	11800013
Research Institution	Kanazawa University
Principal Investigator	小村和久金沢大学, 理学部, 教授 (00110601)
Co-Investigator(Kenkyū-buntansha)	星正治広島大学, 原爆放射能医学研究所, 教授 (50099090) 中西孝金沢大学, 理学部, 教授 (00019499) 山本政儀金沢大学, 理学部, 助教授 (10121295) 三頭聡明東北大学, 金属材料研究所, 助教授 (30005938) 今中哲二京都大学, 原子炉実験所, 助手 (90109083)
Keywords	JCO / 臨界事故 / 中性子 / 環境放射能 / 放射線影響 / 放射化 / 線量 / γ線
Research Abstract	臨界事故により環境に漏えいした中性子で誘導された放射性核種の測定をほぼ完了した。研究成果は2000年5月19日発行の英国の学術雑誌Journal of Environmental Radioactivity特集号"The Tokai-mura Accident"[Vol.50(1,2),2000]で発表し世界的に評価された。現在も比較的半減期の長い核種の測定が本年度は各研究室で継続して行われ、その成果は逐次学術雑誌に発表されている。測定データの共有化をはかるために、試料の種類、採取地点(距離と方角)、測定者、測定結果等のデータベース化、JCO構内と近辺の詳細なマップの作成を行った。2000年7月に第2回環境放射能・放射線夏の学校(辰口)においてJCO事故のワークショップを開催し、議論の成果を「核災害時における専門家のとりくみ」として印刷刊行した。「環境影響調査班」および「人体影響調査班」の研究成果は本年度開催された多くの学会でパネル討論、ワークショップ、一般講演として発表された。主なものはIRPA10国際会議のサテライト講演(2000.5広島)、分析化学会主催「Separation Sciences2000」招待講演(2000.6東京)、理工学における同位元素発表会(2000.7東京)でのパネル討論、放射線影響学会(2000.8東京)、放射化学討論会(2000.9神戸)におけるテーマ講演、原子力学会(2000.9青森)の招待講演のほか、環境科学技術研究所国際セミナー(2000.10,六ケ所村)、弟8回「生態及び環境試料中のアクチニド・長半減期核種の低レベル測定に関する国際会議(2000.10大洗)および放医研セミナー(2000.12千葉)等での特別講演その他で発表された。

Research Products
(20 results)

All Other

All Publications (20 results)

[Publications] 小村和久: "The JCO criticality accident at Tokai-mura, Japan : an overview of the sampling campaign and preliminary results"Journal of Environmental Radioactivity. 50・1,2. 3-14 (2000)
[Publications] 今中哲二: "Neutron dose and power released by the JCO criticality accident in Tokai-mura."Journal of Environmental Radioactivity. 50・1,2. 15-20 (2000)
[Publications] 三頭聡明: "Passive gamma-ray spectrometry for the determination of total fission events in the JCO criticality accident '99 in Tokai"Journal of Environmental Radioactivity. 50・1,2. 20-26 (2000)
[Publications] 松沢孝男: "Gamma dose rate in the vicinity of JCO as of approximately 8:00 pm on September 30,1999."Journal of Environmental Radioactivity. 50・1,2. 27-36 (2000)
[Publications] 高田純: "External doses to 350m zone residents around the Tokai-mura criticality accident site."Journal of Environmental Radioactivity. 50・1,2. 37-42 (2000)
[Publications] 小藤久毅: "An estimation of fast neutron flux by ^<35>Cl(n,α)^<32>P reaction."Journal of Environmental Radioactivity. 50・1,2. 43-48 (2000)
[Publications] 室山俊浩: "Neutron activation of chemical reagents exposed to the neutrons released by the JCO criticality accident."Journal of Environmental Radioactivity. 50・1,2. 55-60 (2000)
[Publications] 中西孝: "Residual neutron-induced radionuclides in a soil sample collected in the vicinity of the criticality accident site in Tokai-mura, Japan : A progress report."Journal of Environmental Radioactivity. 50・1,2. 61-68 (2000)
[Publications] 村田祥全: "Neutron-induced radionuclides in a soil from the JCO campus by non-destructiveγ-ray spectrometry."Journal of Environmental Radioactivity. 50・1,2. 69-76 (2000)
[Publications] 小村和久: "Activation of gold by the neutrons from the JCO accident."Journal of Environmental Radioactivity. 50・1,2. 77-82 (2000)
[Publications] 遠藤暁: "Radioactivity of ^<51>Cr in stainless steel collected from residences in the JCO neighborhood."Journal of Environmental Radioactivity. 50・1,2. 83-88 (2000)
[Publications] 坂内忠明: "Levels of radionuclides in plan t samples collected around the uranium conversion facility following the criticality accident in Tokai-mura."Journal of Environmental Radioactivity. 50・1,2. 131-144 (2000)
[Publications] 一政満子: "Tritium, deuterium and gamma-emitting nuclides in plant leaves in the JCO campus."Journal of Environmental Radioactivity. 50・1,2. 145-150 (2000)
[Publications] 田中敦: "Uranium isotope ratios in the environmental samples collected after a criticality accident in the uranium conversion facilities of JCO."Journal of Environmental Radioactivity. 50・1,2. 151-160 (2000)
[Publications] 吉田聡: "Concentrations of uranium and 235U/238U ratios in soils and plant samples collected around the uranium conversion building in the JCO campus."Journal of Environmental Radioactivity. 50・1,2. 161-172 (2000)
[Publications] 土井妙子: "Radionuclides in aerosol samples collected after the criticality accident in the JCO uranium conversion facility."Journal of Environmental Radioactivity. 50・1,2. 119-122 (2000)
[Publications] 橋本哲夫: "Radiation dosimetry using thermoluminescence from ceramic and glass samples at the JCO critical accident site."Journal of Environmental Radioactivity. 50・1,2. 97-106 (2000)
[Publications] 遠藤暁: "Neutron dose equivalent estimation from the specific activity of ^<51>Cr."Journal of Environmental Radioactivity. 50・1,2. 89-96 (2000)
[Publications] 五十嵐康人: "Radioactive noble gases in surface air monitored at MRI, Tskuba, before and after the JCO accident."Journal of Environmental Radioactivity. 50・1,2. 107-118 (2000)
[Publications] 三頭聡明: "Estimation of total fission events in the JCO criticality accident by passive γ-ray measurement of ^<140>La in radioequilibrium with precursor ^<140>Ba"Journal of.Nuclear and Radiochemical Sci.ence. 1. 51-52 (2000)

2000 Fiscal Year Annual Research Report

臨界事故の環境影響に関する学術調査研究

Principal Investigator

小村 和久 金沢大学, 理学部, 教授 (00110601)

Research Products

[Publications] 小村和久: "The JCO criticality accident at Tokai-mura, Japan : an overview of the sampling campaign and preliminary results"Journal of Environmental Radioactivity. 50・1,2. 3-14 (2000)

[Publications] 今中哲二: "Neutron dose and power released by the JCO criticality accident in Tokai-mura."Journal of Environmental Radioactivity. 50・1,2. 15-20 (2000)

[Publications] 三頭聡明: "Passive gamma-ray spectrometry for the determination of total fission events in the JCO criticality accident '99 in Tokai"Journal of Environmental Radioactivity. 50・1,2. 20-26 (2000)

[Publications] 松沢孝男: "Gamma dose rate in the vicinity of JCO as of approximately 8:00 pm on September 30,1999."Journal of Environmental Radioactivity. 50・1,2. 27-36 (2000)

[Publications] 高田純: "External doses to 350m zone residents around the Tokai-mura criticality accident site."Journal of Environmental Radioactivity. 50・1,2. 37-42 (2000)

[Publications] 小藤久毅: "An estimation of fast neutron flux by ^<35>Cl(n,α)^<32>P reaction."Journal of Environmental Radioactivity. 50・1,2. 43-48 (2000)

[Publications] 室山俊浩: "Neutron activation of chemical reagents exposed to the neutrons released by the JCO criticality accident."Journal of Environmental Radioactivity. 50・1,2. 55-60 (2000)

[Publications] 中西孝: "Residual neutron-induced radionuclides in a soil sample collected in the vicinity of the criticality accident site in Tokai-mura, Japan : A progress report."Journal of Environmental Radioactivity. 50・1,2. 61-68 (2000)

[Publications] 村田祥全: "Neutron-induced radionuclides in a soil from the JCO campus by non-destructiveγ-ray spectrometry."Journal of Environmental Radioactivity. 50・1,2. 69-76 (2000)

[Publications] 小村和久: "Activation of gold by the neutrons from the JCO accident."Journal of Environmental Radioactivity. 50・1,2. 77-82 (2000)

[Publications] 遠藤暁: "Radioactivity of ^<51>Cr in stainless steel collected from residences in the JCO neighborhood."Journal of Environmental Radioactivity. 50・1,2. 83-88 (2000)

[Publications] 坂内忠明: "Levels of radionuclides in plan t samples collected around the uranium conversion facility following the criticality accident in Tokai-mura."Journal of Environmental Radioactivity. 50・1,2. 131-144 (2000)

[Publications] 一政満子: "Tritium, deuterium and gamma-emitting nuclides in plant leaves in the JCO campus."Journal of Environmental Radioactivity. 50・1,2. 145-150 (2000)

[Publications] 田中敦: "Uranium isotope ratios in the environmental samples collected after a criticality accident in the uranium conversion facilities of JCO."Journal of Environmental Radioactivity. 50・1,2. 151-160 (2000)

[Publications] 吉田聡: "Concentrations of uranium and 235U/238U ratios in soils and plant samples collected around the uranium conversion building in the JCO campus."Journal of Environmental Radioactivity. 50・1,2. 161-172 (2000)

[Publications] 土井妙子: "Radionuclides in aerosol samples collected after the criticality accident in the JCO uranium conversion facility."Journal of Environmental Radioactivity. 50・1,2. 119-122 (2000)

[Publications] 橋本哲夫: "Radiation dosimetry using thermoluminescence from ceramic and glass samples at the JCO critical accident site."Journal of Environmental Radioactivity. 50・1,2. 97-106 (2000)

[Publications] 遠藤暁: "Neutron dose equivalent estimation from the specific activity of ^<51>Cr."Journal of Environmental Radioactivity. 50・1,2. 89-96 (2000)

[Publications] 五十嵐康人: "Radioactive noble gases in surface air monitored at MRI, Tskuba, before and after the JCO accident."Journal of Environmental Radioactivity. 50・1,2. 107-118 (2000)

[Publications] 三頭聡明: "Estimation of total fission events in the JCO criticality accident by passive γ-ray measurement of ^<140>La in radioequilibrium with precursor ^<140>Ba"Journal of.Nuclear and Radiochemical Sci.ence. 1. 51-52 (2000)

小村和久金沢大学, 理学部, 教授 (00110601)