The Tokyo Electric Power Company (TEPCO) says the radiation density measured in a water pool in the underground turbine of the Unit Two reactor at the Fukushima power plant is 100-thouand times more than what is measured in the reactor's cooling water.

TEPCO says the radiation level of the water pool in the turbine room measured 19 million becquerels (Bq) per cubic centimeter.

The company says the normal level of radiation is several hundred becquerels. It believes that the surge in radiation is likely due to a leakage from the reactor, adding that it's looking into the possibility.

The radiation of the water pool in the Unit Two reactor is ten times that of the water pool of the Unit Three reactor. On the surface of the pool, one-thousand millisieverts per hour of radiation was detected.

Exposed to radiation exposure of 1000 millisieverts per hour for 30 minutes will reduce one's lymphocytes. Half of those exposed to this radiation strength for four hours can die within 30 days.

TEPCO says it stopped measuring the radiation as the levels were extremely high and the level may have well increased further.