Measurements of seawater obtained in the vicinity of the Fukushima Daiichi Nuclear Power station remained low and stable between 11 to 17 January 2015, according to the regular update and sea area monitoring results provided by Japan's Nuclear Regulation Authority to the IAEA.
The recently reported deaths of two workers - one in Daiichi and the other in Daiini - have both been classified as accidents and not related to any radiological exposure.
The following news stories have further information:
http://www.tepco.co.jp/en/press/corp-com/release/2015/1247504_6844.html
http://www.tepco.co.jp/en/press/corp-com/release/2015/1247513_6844.html