The levels of nuclear radiation around Fukushima’s No. 1 plant have risen to 8 millisieverts per year, surpassing the government standard of 1 milliseviert per year, reports news site Asahi Shimbun citing Tokyo Electric Power Company (TEPCO).
The Nuclear Regulation Authority held a meeting on Friday aimed at curbing the rising levels of radiation to the south of the plant, which has long been a problem area.
TEPCO told press that the predominant reason behind the sharp increase in radiation at the plant was X-rays coming from storage tanks holding radioactive water that has been leaking from the Fukushima facility.
The water in the tanks contains traces of radioactive strontium along with other substances that react with the materials the tank is composed of, producing X-rays, said officials.
Strontium-90 is a radioactive isotope of strontium produced by nuclear fission with a half-life of 28.8 years.
http://rt.com/news/fukushima-radiation-8-times-standard-448/
11.01.2014