By Ria Novosti
Temperatures have been rising slightly in units Five and Six of the Japanese Fukushima 1 Nuclear Power Plant, Kyodo news agency said on Tuesday citing a top state official.
“Temperatures have been rising slightly. This requires attention,” Chief Cabinet Secretary Yukio Edano told reporters.
Kyodo said malfunctions have occurred in the cooling systems of the two units.
Blasts at the Fukushima 1 NPP in northeastern Japan have escalated concerns about a possible nuclear disaster in the country devastated by a powerful 9.0-magnitude earthquake and subsequent tsunami.
Cooling systems of the Fukushima plant failed following the earthquake, resulting in blasts in units One and Three on Monday. Unit Two also overheated on Monday, but the injection of water into the reactor restarted a few hours later.
Early on Tuesday, the 4th reactor was hit by a blast, which resulted in leak of radioactive isotopes. Radioactive iodine and cesium were detected in Tokyo.
The Japanese Transport Ministry declared a no-fly zone within the range of 30 km from the blast-hit plant earlier in the day.