graphite moderator造句

• Past pilot and demonstration projects have all used thermal designs with graphite moderators.
• The only graphite moderator damage was found to be localized around burning fuel elements.
• The Nazi Nuclear Program suffered a substantial setback when its inexpensive graphite moderators failed to work.
• This is a swelling of the graphite moderator caused by the displacement of atoms by neutron radiation.
• This explosion also compromised more of the reactor containment vessel and ejected hot lumps of graphite moderator.
• Thermal output was 30 MW . It was a prototype design using a graphite moderator and water coolant.
• In October 2014 a new kind of crack in the graphite moderator bricks was found at the Hunterston B reactor.
• From May 2012 to December 2013, Unit 1 was offline while repairs were made related to some deformed graphite moderator blocks.
• Under bombardment by neutrons, the carbon atoms in the graphite moderator can be knocked out of the graphite's crystalline structure.
• The design followed the principles established by the Magnox alloy cans within a graphite moderator, all contained in a welded steel pressure vessel.
• The uranium is in the form of uranium oxide particles that are approximately 20 microns in size, and are in direct contact with the graphite moderator.
• The DMSR, as carried into the IMSR design, proposed to use molten salt fuel and graphite moderator in a simplified converter design using TRISO fuelled reactor.
• These heavy water reactors have the advantage of being able to run on natural uranium without using graphite moderators that pose radiological and dust explosion hazards in the decommissioning phase.
• At Hanford, plutonium production fell off as Reactors B, D and F wore out, poisoned by fission products and swelling of the graphite moderator known as the Wigner effect.
• In addition to welding weaknesses, radiolytic depletion of the graphite moderator blocks was still of concern and PAWB continue to campaign for early shut-down of the plant as well as against any nuclear replacement.
• When the fire was extinguished, it was found that the only areas of the graphite moderator to have incurred thermal damage were those that had been in immediate close proximity to the actively burning fuel canisters.
• Now exposed to both air and the heat from the reactor core, the graphite moderator in the reactor core caught fire, and this fire sent a plume of highly radioactive fallout into the atmosphere and over an extensive geographical area.
• In 2006 there was concern that the graphite moderator core in each of the twin AGRs at Hunterston B might have developed structural problems in the form of cracking of the bricks ( as at similar AGRs ) but this has not been confirmed.
• If the reactor vessel developed excessive heat or lost electric power to the air cooling, the plug would melt; the FLiBe would be pulled out of the reactor core by gravity into dump tanks, and criticality would cease as the salt lost contact with the graphite moderator.
• In the Windscale fire, an untested annealing process for the graphite was used, causing overheating in unmonitored areas of the core and leading directly to the ignition of the fire; however, the material that caught fire was not, in fact, the graphite moderator itself, but rather the canisters of metallic uranium fuel within the reactor.