grassing
n.— «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 isn’t ordinary grass,” Sheehand said. “This is marsh grass. It’s seaweed-like, and heavy.” The grass clogged a rotating screen that is designed to keep the grass and other material out of the reactor’s cooling system. This is the grassing season, Sheehan said.» —“Marsh grass ruins restart of Salem I” by David Benson Press of Atlantic City (New Jersey) May 2, 2007. (source: Double-Tongued Dictionary)