graphite

(eg. critical, tattoo, sign )

graphite /ˈɡræ ˌfaɪt/ ?

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Both systems employed graphite to moderate the nuclear reaction.
When an rbmk reactor loses its water coolant the graphite remains in place and a nuclear reaction continues producing heat that, combined with oxygen, can set the graphite on fire.
Built up in layers inside wooden framing, it took the shape of a doorknob the size of a two-car garage a flattened graphite ellipsoid 25 ft.

"Previously, scientists have been able to peel graphene sheets from graphite blocks, but they had no control over the size and location of the pieces when placing them on a surface," Chou said.
on Dec 20, 2007 By: Stephen Chou Source: Princeton University
The former secretary Hwang said, "In fact, I heard the plutonium (extracted) with a graphite reactor is unusable directly from the secretary of munitions manufacture. Before that, they had frequently asked me to find a way as secretary of...
on Feb 20, 2007 By: Hwang Jang Yop Source: ë™ì•„ì¼ë³´
"I went back to wood for my last season (1998-99)," said Phoenix coach Wayne Gretzky, the NHL's career scoring leader. "Brett Hull once told me that pucks bounce off the graphite sticks a lot and players don't handle the puck as well as they...
on Oct 13, 2007 By: Wayne Gretzky Source: Columbus Dispatch