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In the Windscale fire, an untested annealing process for the graphite was used, and that contributed to the accident – however it was the uranium fuel rather than the graphite in the reactor that caught fire. The only graphite moderator damage was found to be localized around burning fuel elements. [1] [2]
Since energy is conserved, this reduction of the neutron speed takes place by transfer of energy to a material called a moderator. The probability of scattering of a neutron from a nucleus is given by the scattering cross section. The first few collisions with the moderator may be of sufficiently high energy to excite the nucleus of the moderator.
Nuclear graphite is any grade of graphite, usually synthetic graphite, manufactured for use as a moderator or reflector within a nuclear reactor.Graphite is an important material for the construction of both historical and modern nuclear reactors because of its extreme purity and ability to withstand extremely high temperatures.
The claim: ABC fired presidential debate moderators David Muir, Linsey Davis. A Sept. 13 Facebook post (direct link, archive link) includes pictures of ABC News journalists David Muir and Linsey ...
A discussion moderator or debate moderator is a person whose role is to act as a neutral participant in a debate or discussion, holds participants to time limits and tries to keep them from straying off the topic of the questions being raised in the debate. Sometimes moderators may ask questions intended to allow the debate participants to ...
The following is an excerpt from the latest edition of Yahoo's fantasy football newsletter, Get to the Points! If you like what you see, you can subscribe for free here. A players-to-drop column ...
Quincy Jones’ cause of death has been revealed.. The legendary music producer died of pancreatic cancer, according to his death certificate, which was obtained by TMZ.. A rep for the Los Angeles ...
The mere act of extinguishing a fire can destroy potential evidence of arson or what is also known as an "incendiary fire." Firefighters are educated that the stream of their fire hose or the use of a pike pole can destroy evidence and efforts are made to do what is required to extinguish the fire, while not destroying clues to the fires ...