(22:50 March 14); and 79 hours for reactor 3 (22:10 March 14). In addition, NISA more than doubles its original estimate of radiation that escaped into the atmosphere in the first six days, from 370,000 terabecquerels to 770,000 terabecquerels. Wednesday, 8 June The ministry of education says that strontium and have been detected in soil samples collected from late March to early May and 22–62 km away from the Fukushima Daiichi plant. The highest values are reported in Namie town at 1,500 Bq/kg of strontium , and 250 Bq/kg of strontium . The Japanese government's report on the Fukushima disaster to IAEA is described in an article in the Yomiuri newspaper. The government report states that nuclear fuel has possibly melted through the base of the pressure vessels in the first three reactors. With data from the government report, the newspaper compares the March timelines provided by TEPCO and by NISA, which had performed further analysis; there were differences in the theoretical timing of events of up to 29 hours in the days following the tsunami. Thursday, 9 June A spokesman for TEPCO says the company is revising its earlier road-map for bringing the plant under control, including the time expected to achieve cold shutdown. Tuesday, 14 June From 00:44 to 02:35 there is a massive steam and smoke release from unit 3, recorded by the TEPCO live cam. No explanation has been given yet by TEPCO officials. Wednesday, 15 June TEPCO begins a trial run of a radioactive water treatment system in an effort to break away from the vicious cycle of injecting water into reactors to cool them and ending up with more contaminated water. While contaminated water is treated, the system is expected to produce about 2,000 cubic meters of radioactive sludge by the end of 2011. Saturday, 18 June The radioactive water treatment system is forced to shut down because a filter exceeds its radioactivity limit. The separation unit, which removes caesium from the water, had been expected to last about a month before its cartridge required replacing—at a radiation level of 4 millisieverts per hour. The radiation levels near the filter cartridge replacement valves reach 4.7 millisieverts per hour after just 5 hours of operation, reportedly due to oil and sludge in the water which contained more radioactivity than expected. Sunday, 19 June Radiation in some areas of Tsukidate, 50 km NW of the Fukushima