TAMBAYA
Boron Carbide Ceramic Don Neutron Absorption A Masana'antar Nukiliya
2023-11-09

Nuclear Power Plant


BoronCarbide (B4C)shi ne abin da aka fi so don aikace-aikacen sha da radiation na nukiliya saboda yana ƙunshe da babban ma'aunin zarra na boron kuma yana iya aiki a matsayin mai ɗaukar neutron da ganowa a cikin injin nukiliya.Boron metalloid da ake samu a yumbura B4C yana da isotopes da yawa, wanda ke nufin kowane zarra yana da adadin protons iri ɗaya amma adadi na musamman na neutrons.Saboda ƙananan farashinsa, juriya na zafi, rashin samar da rediyoisotope, da ikon yin garkuwa da radiation, B4C yumbu kuma babban zaɓi ne don kayan kariya a masana'antun nukiliya..

Boron Carbide abu ne mai mahimmanci ga masana'antar nukiliya saboda babban ɓangaren shayarwar neutron (barns 760 a 2200 m/sec neutron gudun neutron). Isotope na B10 a cikin boron yana da babban ɓangaren giciye (barn 3800).

 

Atom ɗin lamba 5 na sinadarin boron yana nuna cewa yana da protons 5 da electrons 5 a tsarinsa na atomic. B shine alamar sinadarai na boron. Babban boron na halitta ya ƙunshi tsayayyen isotopes guda biyu, 11B (80.1%) da 10B (19.9%). Sashin shayarwa don neutrons mai zafi a cikin isotope 11B shine sito 0.005 (na neutron na 0.025 eV). Yawancin (n, alpha) halayen neutrons masu zafi sune 10B (n, alpha) halayen 7Li tare da 0.48 MeV watsin gamma. Haka kuma, isotope 10B yana da babban (n, alpha) amsa juzu'i tare da dukkan bakan makamashi na neutron. Sassan giciye na yawancin sauran abubuwa sun zama ƙanana sosai a manyan kuzari, kamar yadda yake a cikin cadmium. Sashin giciye na 10B yana raguwa tare da makamashi.


Babban sashin shayarwa na tsakiya yana aiki azaman babban gidan yanar gizo lokacin da na'urar neutron kyauta da aka samar ta hanyar fission na nukiliya yana hulɗa da boron-10. Saboda wannan, boron-10 yana da mahimmanci fiye da sauran kwayoyin halitta.

Wannan karo yana haifar da isotope na Boron-11 wanda ba shi da kwanciyar hankali, wanda ya karye zuwa:

helium atom ba tare da electrons ba, ko alfa barbashi.

lithium-7 atom

Gamma radiation

 

Ana iya amfani da gubar ko wasu abubuwa masu nauyi don samar da garkuwa mai ɗaukar makamashi da sauri.

Wadannan sifofin sun ba da damar amfani da boron-10 azaman mai sarrafa (guba neuron) a cikin injin nukiliya, duka a cikin sigarsa mai ƙarfi (boron Carbide) da sigar ruwa (boric acid). Idan ya cancanta, ana shigar da boron-10 don dakatar da sakin neurons wanda ya haifar da fission na uranium-325. Wannan neutralizes da sarkar dauki.


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