seawater samples on 30 March Levels of radioactive iodine 7.5 million times higher than regulatory limits were detected in seawater samples near the unit 2 water intake on 2 April On 2 April highly radioactive (over 1 Sv/hour) water was discovered leaking from a concrete structure housing electrical cables into the sea through cracks in the concrete wall; as of 6 April this leakage has been stopped On 4 April the release of 10,000 tons of low-level radioactive waste water began in order to make room for the highly radioactive water discovered on 2 April Radioactive material was detected in underground water sampled near the turbine buildings on 30 March Radioactive material has been detected in milk and agricultural products from Fukushima and neighboring prefectures, prompting government limits on shipments (21 March) and intake (23 March) for some products Radioactive iodine was found in tap water in some prefectures between 21 and 27 March, prompting government warnings not to drink the water in those regions; as of 2 April these warnings have been lifted Levels of radioactive caesium above regulatory limits were detected in small fish caught off the coast of Ibaraki on 4 April |- | style="border-bottom:3px solid black;" | Evacuation radius | colspan="6" style="border-bottom:3px solid black;" | 20 km from the nuclear power station, but 30 km should consider leaving as of 25 March 11:30 JST |- | General status from all sources regarding reactor cores | | | | | | |- | General status from all sources regarding Spent-Fuel Pools | | | | | | |- !colspan="7" | Information sources |} Saturday, 9 April Japan still struggles to keep water on the reactors to cool them and prevent further meltdown. Russian Antonov An-124 cargo planes fly out of Atlanta and Los Angeles, each carrying a huge concrete boom pump. The two 95-ton boom pumps, which TEPCO purchased for $2million each, can be operated from two miles away by remote control. Each boom pump can direct focused streams of water into the damaged reactors. TEPCO does not plan to take a Chernobyl approach to resolving the nuclear power plant crisis by entombing the radioactive material in concrete. If this decision were to change, the boom pumps could be retrofitted to deliver concrete for that purpose. Prior to the elevation to level 7 by the Japanese authorities James Acton, Associate of the Nuclear Policy Program at the