Tokyo Electric Power, the operator of Japan ’s crippled Fukushima nuclear plant, on August 1 detected the highest radiation levels at the facility since the March 11 earthquake and tsunami.

The radiation levels, 10,000 millisieverts per hour, were measured at the bottom of a ventilation stack standing between reactors No. 1 and No. 2.

TEPCO immediately cordoned off the area to ensure the safety for the plant’s workers.

If exposed to such a high-level dosage of radiation in a short
period of time, almost all people exposed would die within one or two weeks, radiation experts said.

The workers who measured the radiation doses on August 1 were exposed to radiation of up to 4 millisieverts.

NHK World TV reported that the Japanese Government has asked rice-producing regions to check their crops for radiation before and after harvest. The tests are designed to ensure that rice on the market will be free of radioactive cesium believed to come from the Fukushima nuclear power plant.

The government says it will suspend rice shipments if levels of cesium exceeding the safety limit are detected./.