On 17 October 2013, the Japanese Nuclear Regulation Authority (NRA) provided the IAEA with an?update?on radioactivity in seawater at TEPCO's Fukushima Daiichi Nuclear Power Station (NPS).

The NRA report notes that on 9 October 2013, TEPCO found that the concentrations of Cs-134 and Cs-137 in sampling seawater obtained from inside the screen silt fence at Unit 2 of TEPCO's Fukushima Daiichi NPS increased compared with the previous results. The NRA provided a?link to this TEPCO data.

In addition, the NRA provided a?monitoring report of sea area radioactivity?obtained from samples taken in the vicinity of TEPCO's Fukushima Daiichi NPS and in the open sea.

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