Reducing power due to high sea water temperature is something any power plan, regardless of fuel type, would have to do. The sea water isn't used to cool the r

Reducing power due to high sea water temperature is something any power plan, regardless of fuel type, would have to do. The sea water isn't used to cool the reactor, it us used to condense the steam after leaving the turbine. If the cooling water is very warm adequate vacuum in the condenser is not possible to maintain. To alleviate this problem power is reduced to reduce the condensing load and maintain condenser vacuum. The linked article has factual misinformation in it which isn't unusual for technical pieces in newspapers.