Ukobvu hwebhodhi reboron-polyethylene hunosvika 2cm-30cm. Basa rayo rehunyanzvi ndere tekinoroji yenyukireya inoshandiswa kudzivirira mwaranzi inoisa ionizing. Bhodhi reboron-polyethylene rinoshandiswa kudzivirira manyutroni anokurumidza emunda wemwaranzi yeneutron, neutron uye munda wemwaranzi wakasanganiswa weY mumunda wekudzivirira mwaranzi inoisa ionizing, kudzivirira kukuvara nekukuvadzwa kwemwaranzi kunokonzerwa nemwaranzi yeneutron kuvashandi vebasa neveruzhinji.
Kuti pave nekuvandudzwa kwekudzivirira kwe boron polyethylene pa fast neutron uye kugadzirisa dambudziko rekuti zvakaoma kugadzira boron polyethylene board muChina, bhodhi re polyethylene rine boron rine boron ye8% rakagadzirwa. Panyaya yekudzivirira ma neutron anokurumidza, sezvo huwandu hwasara hwema neutron huri 1.0086649U, nepo hwemaatomu ehydrogen (kureva ma proton) huri 1.007825 U [1], huwandu hwema neutron eatomu huri pedyo nehuya hwemaatomu ehydrogen. Saka, kana neutron inokurumidza yasangana ne hydrogen nuclei mu shielding body, zviri nyore kurasikirwa nesimba nekuendesa ku nucleus ye hydrogen atomu, zvichideredza fast neutrons kuenda ku slow neutrons ne thermal neutrons. Kana shielding body iine hydrogen yakawanda, simba rekudzivirira richava rakasimba. Pakati pe hydrogen iri mu neutron shielding materials anoshandiswa zvakanyanya, hydrogen iri mu polyethylene ndiyo yakanyanya, inosvika 7.92x IO22 maatomu /cm3 gas. Saka, polyethylene ndiyo inonyanya kugadzirisa ma neutron anokurumidza. Mushure mekunge ma neutron anokurumidza kudzika kuita ma neutron anopisa, zvinhu zvinodzivirira zvine chikamu chikuru chekutora ma neutron anopisa pasina mwaranzi yeY ine simba rakawanda zvinodiwa kuti zvitore ma neutron anopisa, kuitira kuti chinangwa chekudzivirira ma neutron anokurumidza kukwira chibudirire. Nekuda kwechikamu chekutora ma neutron anokurumidza kukwira che (3840 lL)X10_24cm2[3], uye kuwanda kwe kiB mu natural boron i18.98% [3], zviri nyore kuwana, zvinhu zvine boron zvinonwisa zvakanaka pakudzivirira ma neutron anopisa.
Dziviriro yemwaranzi yenyuturoni muzviteshi zvesimba renyukireya, zvinomhanyisa simba repakati nepakati (rakakwirira), maatomu reactor, ngarava dzepasi pemvura dzenyukireya, zvinomhanyisa zvekurapa, michina yekurapa neutron nedzimwe nzvimbo.
Nguva yekutumira: Chivabvu-31-2022
