positive electrical charged special carbon filters can help filter nuclear particles from the water supply when extracted from reservoirs in Japan; and the use of water clear leaded glass rods will turn dark if high radiation is detected! can be used in goggles and face masks, radiation badges etc; and special electronic sensors for nuclear power stations! NOte nuclear iodine is degraded by oxygen and fireman and rescue workers should be made aware of this! this is why nuclear iodine decays rather quickly in the atmosphere!