grassing
n.β Β«Neil Sheehan, a spokesman with the Nuclear Regulatory Commission, said the older of the two Salem units had reached 80 percent power when operators had to shut it down due to what the industry calls grassing. “You have to remember this isnβt ordinary grass,” Sheehand said. “This is marsh grass. Itβs seaweed-like, and heavy.” The grass clogged a rotating screen that is designed to keep the grass and other material out of the reactorβs cooling system. This is the grassing season, Sheehan said.Β» ββMarsh grass ruins restart of Salem I” by David Benson Press of Atlantic City (New Jersey) May 2, 2007. (source: Double-Tongued Dictionary)