Neutrons nyob rau hauv thermal neutron reactors yuav tsum tau kho kom haum.Raws li lub hauv paus ntsiab lus ntawm reactors, thiaj li yuav ua tau zoo moderation nyhuv, lub teeb atoms nrog loj tus naj npawb ze rau neutrons yog zoo rau neutron moderation.Yog li ntawd, cov ntaub ntawv nruab nrab xa mus rau cov ntaub ntawv nuclide uas muaj cov lej qis thiab tsis yooj yim rau kev ntes cov neutrons.Cov khoom siv no muaj qhov loj dua neutron tawg hla ntu thiab me dua neutron absorption cross-section.Cov nuclides uas ua tau raws li cov xwm txheej no suav nrog hydrogen, tritium,beryllium, thiab graphite, thaum cov khoom siv tiag tiag suav nrog cov dej hnyav (D2O),beryllium(Be), graphite (C), zirconium hydride, thiab qee qhov tsis tshua muaj ntiaj teb sib txuas.
Lub thermal neutron capture hla ntu ntawmtsawg ntiaj tebcov ntsiab lusyttrium,cerium, thiablanthanumtag nrho cov me me, thiab lawv tsim cov hydrides sib xws tom qab hydrogen nqus.Raws li cov neeg nqa khoom siv hydrogen, lawv tuaj yeem siv los ua cov neeg nruab nrab hauv cov reactor cores kom qeeb neutron tus nqi thiab nce qhov tshwm sim ntawm cov tshuaj tiv thaiv nuclear.Yttrium hydride muaj ntau cov hydrogen atoms, sib npaug rau cov dej, thiab nws qhov kev ruaj ntseg zoo heev.Txog 1200 ℃, yttrium hydride tsuas yog poob qis heev hydrogen, ua rau nws muaj kev cog lus siab kub reactor deceleration khoom.
Post lub sij hawm: Oct-19-2023