On 13 March 2020, Japan provided the IAEA with a copy of a report on the summary of decommissioning and contaminated water management, the discharge record and seawater monitoring results with regard to groundwater pumped from the subdrain and groundwater drain systems, as well as, bypassing groundwater pumped at the Fukushima Daiichi Nuclear Power Station during December 2019, which the Ministry of Foreign Affairs has sent to all international Missions in Japan.
The report contains information on decommissioning and contaminated water management, discharges from the subdrain and groundwater drain systems, as well as on groundwater bypassing conducted during the month of December. In all cases, in advance of the action, TEPCO analyzes the quality of the groundwater to be discharged and announces the results. These results confirm that the radiation level of sampled water are substantially below the operational targets set by TEPCO.