Pono e hoʻololi ʻia nā neutrons i loko o nā reactors thermal neutron. E like me ke kumu o nā reactors, i mea e hoʻokō ai i ka hopena hoʻohaʻahaʻa maikaʻi, ʻo nā atom māmā me nā helu nui kokoke i nā neutrons he mea pono no ka neutron moderation. No laila, ʻo nā mea hoʻohālikelike e pili ana i kēlā mau mea nuclide i loaʻa nā helu lehulehu haʻahaʻa a ʻaʻole maʻalahi ke hopu i nā neutrons. Loaʻa i kēia ʻano mea kahi ʻāpana hoʻopuehu neutron nui a ʻoi aku ka liʻiliʻi o ka neutron absorption cross-section. ʻO nā nuclides e kū ana i kēia mau kūlana he hydrogen, tritium,beryllium, a me ka graphite, ʻoiai nā mea maoli i hoʻohana ʻia me ka wai kaumaha (D2O),beryllium(Be), graphite (C), zirconium hydride, a me kekahi mau pūhui honua laha ʻole.
ʻO ka neutron wela e hopu i nā ʻāpana keʻa ohonua lahamau meayttrium,cerium, alanthanumliʻiliʻi nā mea a pau, a hana lākou i nā hydrides like ma hope o ka lawe ʻana i ka hydrogen. Ma ke ʻano he mea lawe hydrogen, hiki ke hoʻohana ʻia e like me nā moderators paʻa i nā cores reactor e hoʻolohi i ka neutron rates a hoʻonui i ka likelika o nā hopena nuklea. Loaʻa i ka Yttrium hydride ka nui o nā hydrogen atoms, e like me ka nui o ka wai, a maikaʻi loa kona kūpaʻa. A hiki i ka 1200 ℃, yttrium hydride wale nō e nalowale i ka hydrogen liʻiliʻi, e lilo ia i mea hoʻohiki hoʻohaʻahaʻa reactor kiʻekiʻe.
Ka manawa hoʻouna: ʻOkakopa-19-2023