Radiation in seawater may be spreading in Japan 28 Mar 2011 Highly radioactive iodine seeping from Japan's damaged Fukushima Dai-ichi nuclear complex may be making its way into seawater farther north of the plant than previously thought, officials said Monday, adding to radiation concerns as the crisis stretches into a third week. Mounting problems, including badly miscalculated radiation figures and no place to store dangerously contaminated water, have stymied emergency workers struggling to cool down the overheating plant and avert a disaster with global implications.