Osamu Tsukimori and Yuka Obayashi
June 19, 2013
High levels of a toxic substance called strontium-90 have been found in groundwater at the devastated Fukushima nuclear power plant in Japan, the utility that operates the facility said on Wednesday.
Strontium-90 is a by-product of the fission of uranium and plutonium in nuclear reactors as well as nuclear weapons, according to the website of the U.S. Environmental Protection Agency.
The discovery of rising levels of such radioactive material is likely to complicate efforts by the utility, Tokyo Electric Power Co (TEPCO), to get approval to release what it describes as water contaminated with low levels of radiation into the Pacific Ocean.