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Tepco found significantly high level of Tritium in groundwater and in seawater.
(cf, 4500 Mega Bq/m3 of Tritium detected on the east side of reactor2, “Sr-90 data is UNDER ANALYSIS” [URL])
(cf, Tritium level in seawater spiked over double within 2 weeks [URL 2])
About 500,000,000 Bq/m3 of Tritium detected on the east side of reactor2, Tepco analyzed the cause and mechanism of how it is spreading as below.
When leakage from the reactor 2 water intake section occurred in April 2011, a part of leaked water permeated and spread into the north-side ground through the reactor 2 power cable conduit, and remains under the ground.
While cesium has been absorbed onto the soil, tritium has been moved by groundwater.
http://www.tepco.co.jp/nu/fukushima-np/handouts/2013/images/handouts_130624_04-j.pdf
http://www.tepco.co.jp/en/nu/fukushima-np/handouts/2013/images/handouts_130619_03-e.pdf
Iori Mochizuki I see no hope in the old system of Japan.