The released amount of Cs-137 and Cs-134 from the crippled reactors in Fukushima plant reached over the double compared to the previous year.
Tepco released their monthly report about the additional atmospheric contamination on 25th February 2019.
According to the report, from January 2018 to January 2019, 933,000,000 Bq of Cs-137 and Cs-134 were release from the buildings of reactor 1, 2, 3 and 4 in total. It was 471,000,000 Bq during the corresponding period of the previous year.
Tepco commented it is likely to be affected by debris removal task around reactor 1 etc.. They avoided mentioning the further details.