Moscow: Tokyo Electric Power Company (TEPCO) has created a radiation map to check the levels of the radioactive debris and has assured to clean up the at Japan's quake-hit Fukushima nuclear plant by the end of July.

TEPCO on Monday said that highly radioactive debris is lying in some areas of the compound. Radioactivity of 900 millisieverts per hour was detected on a concrete fragment near the third reactor on Wednesday, a TV channel reported.

The company has said, however, that it hasn't decided yet on places and methods of disposing of removed debris.

The 9.0-magnitude earthquake and subsequent 15-metre tsunami March 11 triggered a crisis at Fukushima nuclear plant, which is being rated at the same level as the 1986 Chernobyl disaster.

Fukushima's operator TEPCO has since been struggling to stop radioactive leaks from the plant's crippled reactors. Almost 80,000 people living within the evacuation zone were forced to flee their homes.