葡京现金游戏

Radiation closes German research centre

作者:屈突续短    发布时间:2019-03-03 02:01:09    

Environmental authorities have closed off a former East German nuclear research centre after finding massive radioactive contamination. Readings of more than 56 000 becquerels per kilogram were taken from vegetation within the compound of Berlin’s Central Institute for Isotope and Radiation Research. The German safety limit is 20 Bq/kg. The contamination is not short-lived. Cobalt-60, found in substantial quantities, has a half-life of five years and the major contaminant, caesium-137, has a half-life of more than 30 years. Officials stumbled across the pollution during routine tests. The head of Berlin’s Radiation Measurement Office, Udo Morfeld, says the contamination probably began in the 1950s but that some of it is recent. ‘We don’t know how it happened and no one here is talking.’ Topsoil from the compound will have to be removed and stored in a radioactive waste storage site at the Hahn-Meitner Institute in the west of Berlin. The pollution has not created as big a problem as it could have, says Morfeld,

 

Copyright © 网站地图