Akhir 23, 1432, March 28, 2011, SPA -- A partial meltdown caused high levels of radioactive materials detected in water at a reactor at an earthquake- and tsunami-damaged nuclear power plant in north-eastern Japan, the government said Monday. The partial meltdown of spent fuel rods was believed to be temporary at reactor 2 at the six-reactor plant in Fukushima, 250 kilometres north-east of Tokyo, Chief Cabinet Secretary Yukio Edano said without elaborating. The level of the radiation-contaminated water found in an adjacent turbine building of reactor 2 measured more than 1,000 millisieverts per hour, according to a report of DPA.