Natural variation of ambient dose rate in the air of Izu-Oshima Island after the Fukushima Daiichi Nuclear Power Plant accident

 

Abstract

The ambient dose rate in air and radioactivity concentration in soil samples collected on Izu-Oshima Island were observed in 2012, 2013 and 2014, i.e. 1, 2 and 3 years after the severe accident at the Fukushima Daiichi Nuclear Power Plant. A car-borne survey for the ambient dose rate in air was carried out for the entire island. Soil samples were collected for the radioactivity concentration measurements from 22 points. The ambient dose rates in air were 36 nGy h−1 in 2012, 34 nGy h−1 in 2013 and 29 nGy h−1 in 2014. The corresponding radioactivity concentrations in those years for 134Cs were 53, 39 and 29 Bq kg−1 and for 137Cs, 87, 73 and 75 Bq kg−1. All the values have decreased every year.

分别对2012年2013和2014年也就是辅导事故的后123年,对空气的环境剂量率和突然样品的比活度数据进行了收集。地点为日本的Izu-Oshima 岛,使用车载巡测了全岛的环境剂量率,土壤样品则选择了22个点进行了比活度测量。空气中的环境剂量率竟然才只有几十个纳,比我国的本底还低,说明空气中的污染已经很轻微了或者说完全没有了,不过土壤中的Cs-134和Cs-137还是有一些浓度的,说明了长寿命的还是存在的,尤其是Cs-137,30多年的半衰期,但是数据总体显示,两种核素的浓度每年都在减少,这个其实不说也知道的。

RPD Volume 168 Issue 4 March 2016 评论6的更多相关文章

  1. RPD Volume 168 Issue 4 March 2016 评论7-end

    Shielding activation of petawatt laser facilities in Romania: a FLUKA preliminary evaluation   Abstr ...

  2. RPD Volume 168 Issue 4 March 2016 评论5

    Monte Carlo simulation of secondary radiation exposure from high-energy photon therapy using an anth ...

  3. RPD Volume 168 Issue 4 March 2016 评论4

    Non-vascular interventional procedures: effective dose to patient and equivalent dose to abdominal o ...

  4. RPD Volume 168 Issue 4 March 2016 评论3

    Design and fabrication of a multipurpose thyroid phantom for medical dosimetry and calibration   Abs ...

  5. RPD Volume 168 Issue 4 March 2016 评论2

    Influence of the phantom shape (slab, cylinder or Alderson) on the performance of an Hp(3) eye dosem ...

  6. RPD Volume 168 Issue 4 March 2016 评论1

    GEANT4 calculations of neutron dose in radiation protection using a homogeneous phantom and a Chines ...

  7. RPD Volume 172 Issue 1-3 December 2016 评论02

    Introduction to the special issue of Radiation Protection Dosimetry This special issue is a collecti ...

  8. RPD Volume 172 Issue 1-3 December 2016 评论04 end

    这一篇作为本期的结束是因为发现后面的一些基本上也是EPR有关的会议内容, Contribution of Harold M. Swartz to In VivoEPR and EPR Dosimetr ...

  9. RPD Volume 172 Issue 1-3 December 2016 评论03

    Using Stable Free Radicals to Obtain Unique and Clinically Useful Data In Vivo in Human Subjects Abs ...

随机推荐

  1. clique 解题报告

    clique 题目描述 数轴上有 \(n\) 个点,第 \(i\) 个点的坐标为 \(x_i\),权值为 \(w_i\).两个点 \(i\),\(j\) 之间存在一条边当且仅当 \(abs(x_i-x ...

  2. 洛谷 P3477 [POI2008]PER-Permutation 解题报告

    P3477 [POI2008]PER-Permutation 题目描述 Multiset is a mathematical object similar to a set, but each mem ...

  3. 在linux环境下让java代码生效的步骤

    1.kill jboss 2.compile 3.deploy 4.bootstrap jboss.

  4. Bzoj1917 [Ctsc2010]星际旅行

    Time Limit: 10 Sec  Memory Limit: 259 MBSubmit: 185  Solved: 118 Description 公元3000年,地球联盟已经攻占了银河系内的N ...

  5. MINA 网络黏包处理代码

    本文完整代码,可以浏览: https://github.com/hjj2017/xgame-code_server/blob/master/game_server/src/com/game/gameS ...

  6. bzoj 1067 特判

    这道题的大题思路就是模拟 假设给定的年份是x,y,首先分为4个大的情况,分别是 x的信息已知,y的信息已知 x的信息已知,y的信息未知 x的信息未知,y的情况已知 x的信息未知,y的情况未知 然后对于 ...

  7. CentOS 7 主机加固手册-下

      CentOS 7 主机加固手册-上 CentOS 7 主机加固手册-中 CentOS 7 主机加固手册-下 0x1f 删除禁用非必要的服务 删除非必要的服务 # Remove yum remove ...

  8. C++ 迭代器容器学习

    set的一个用法 . difference找差集 union合并set intersection找到交集 #include<iostream> #include<string> ...

  9. UVA 10385 Duathlon

    Problem HDuathlonInput: standard inputOutput: standard outputTime Limit: 15 seconds A duathlon is a ...

  10. TortoiseSVN安装使用【转】

    转自:http://www.cnblogs.com/rushoooooo/archive/2011/04/29/2032346.html TortoiseSVN是windows平台下Subversio ...