TWO of the Fukushima 50 were rushed to hospital with radiation poisoning after standing in a contaminated puddle.

The pair were laying electrical cables at the plant when they were exposed to radioactive elements on their feet.

Another worker was also exposed to high radiation at the stricken reactor No3 as they sought to restore power knocked out during the devastating earthquake and tsunami on March 11.

A spokesman for the Nuclear and Industrial Safety Agency said: "Three workers who were working to lay cables in the basement of the turbine building were exposed to radiation between 170 to 180 millisieverts.

"Two were sent to hospital after they found themselves in a puddle of water. Although they wore protective clothing, the contaminated water seeped in and their legs were exposed to radiation."

Officials today said radiation levels in Tokyo's water supply had fallen.

Yesterday it was reported radioactive iodine in the capital's tap water measured more than twice the level considered safe for babies.