Radioactive water leakage in Japan

Radioactive water continues to leak from Japan's nuclear plant into the ocean Saturday with little success in stopping.
Ever since the magnitude-9 earthquake hit Japan on March 11 the Fukushima Dai-ichi nuclear complex has been leaking radioactivity, which is may be the source of radioactivity found in coastal waters in the past few days reported the Star Tribune. The leak found at the nuclear plant is the latest indication that the strategies being used to cool the overheating reactors could be creating new problems reported The Washington Post .
According to the Washington Post Japan's nuclear regulatory office pooled toxic water from an almost eight-inch-long crack in the concrete wall of a maintenance pit at the unit-2 reactor. The level of radioactivity in the air above the water was measured at 1,000 millisieverts per hour, which is four times the maximum level that plant workers can legally be exposed to.
Water two feet away from the crack in the pit was measured at 400 millisieverts as radiation quickly scatters through water and air, but by the time it reaches the Pacific Ocean it will be quickly diluted reported the Star Tribune.
The Los Angeles Times reported that on Sunday engineers attempted to use a mixture of sawdust, shredded paper and polymer or plastic that expanded to 500 times its size when exposed to water to plug the crack and then were going to pour concrete on top of the polymer. Unfortunately the polymer didn't form a plug and radioactive water continued to flow into the ocean.
Radiation measurements of iodine-131 have been found at 25 miles south of the plant in the seawater at twice the legal limit, but officials said that the measurements are still below levels dangerous to human health reported the Star Tribune.
According to the Star Tribune the radiation concerns have made it even more difficult for the people to go back to their normal lives as more than 165,000 people are living in shelters, 260,000 households still don't have running water and 170,000 don't have electricity.