Sea salps — gelantinous, marine organisms that look like jellyfish — have clogged water systems used to cool nuclear reactors in South Korea, forcing two units offline. It’s the second time in less than three weeks Korea Hydro & Nuclear Power Co. shut the Hanul No. 1 and No. 2 units, after salps clogged water intake valves. The reactors, which each have a capacity of 950-megawatts, resumed operation last week before shutting again Tuesday. Sea salps can link up into chains several meters in length and have been said to resemble a crystal chandelier drifting through the ocean. The organisms typically increase in number in June but that appears to have happened in March this year due to earlier-than-normal warm currents, said Yu Ok Hwan, a deputy director at Korea Institute of Ocean Science and Technology.
Bloomberg 7th April 2021 read more »