South China Morning Post, Aug 13, 2014: Tepco began pumping up groundwater from beneath the Fukushima plant [and it] intends to test the radioactivity of the water and examine whether levels can be reduced. [...] fishermen are expected to voice opposition. The government is likely to step in to provide additional subsidies to help sway the fishermen.
NHK World, Aug 11, 2014: [Tepco] says the new system will improve the current situation, in which large amounts of contaminated groundwater have leaked into the sea.
Yomiuri Shimbun, Aug 7, 2014 (emphasis added): The government and [TEPCO] are considering pumping up contaminated groundwater [from] subdrain pits, the wells [that] surround the reactor and turbine buildings. [...] TEPCO will build water purification equipment by this autumn to remove most radioactive substances [...] Groundwater to be pumped up from some of the subdrain pits includes high levels of tritium [...] that cannot be removed with the purification equipment.
Mainichi, Aug 7, 2014: Wells called, “sub-drains,” surround reactor buildings [and contain] a large amount of radioactive cesium and strontium
Tepco: Unit 1 Sub-Drain, Apr. 15, 2013 (pdf), published Mar. 19, 2014:
- Pu-238: 8.7×10-6 Bq/cm³ = 8.7 Bq/m³
- Pu-239 + Pu-240: 2.3×10-6 Bq/cm³ = 2.3 Bq/m³
- “Plutonium detected this time is supposed to be those accumulated on the ground after the accident (not from the new leak at the Building), and was flowed into the sub-drain conveyed by rainwater.”
- Pu-238: 6.5 × 10-6 Bq/cm³ = 6.5 Bq/m³
- Pu-239 + Pu-240: 2.3 × 10-6 Bq/cm³ = 2.3 Bq/m³
- “It is considered that plutonium was temporary detected because fallouts of the accident piled on the soil were inflowed into the sub-drains with rainwater.”