On 19 December 2013, the Nuclear Regulation Authority (NRA) of Japan provided the IAEA with a Comprehensive Radiation Monitoring Plan which covered a period of over 18 months from 2 August 2011 to 1 April 2013.
In addition, the NRA provided a report on the implementation of sea areas monitoring that assessed and reported on the radiation effects caused by the accident at Fukushima Daiichi NPS. This document provides information of the monitoring organizations involved in this task, the sea areas monitored, and the results from the measuring the concentration of radioactive materials in seawater, sediment and marine biota.
The NRA also submitted further information to the IAEA on the sampling points for sea area monitoring for this year.
As of 13 December 2013, TEPCO has made changes to its dose evaluation process for the site boundary which are outlined in the document available here.
In addition, TEPCO provided a progress report covering the historical data of radioactive density recorded in their ground water sampling programme around the east side of Unit 1-4 Turbine Buildings, which can be accessed here.