Sea salps are gelatinous, marine organisms that resemble jellyfish, they are typically less than 10cm tall.
The little creatures proved to be a major pest to South Korea’s nuclear industry.
The creatures have clogged water systems used to cool Korea Hydro & Nuclear Power Co’s Hanul No. 1 and No. 2 reactors, forcing them to shut Tuesday (April 6), the second time in less than three weeks the units were taken offline due to sea salps.
The reactors, each with 950-megawatts capacity, were shut down for about a week in late March.
The longer the shutdowns last the more expensive they will become. According to BloombergNEF analyst Olympe Mattei, if the initial eight-day outage was offset with generation from liquefied natural gas, a 60,000-ton cargo of the supercooled fuel would cost roughly US$21.8 million (S$29.23 million).