Video: Yuav ua li cas yog ib tug nuclear saw reactivation pib?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Nuclear chain reactions yog series nuclear fissions (splitting ntawm atomic nuclei), txhua pib los ntawm ib tug neutron ua nyob rau hauv ib tug ua ntej fission. Piv txwv li, 21/2 neutrons nyob rau nruab nrab yog tso tawm los ntawm fission ntawm txhua uranium-235 nucleus uas absorbs ib tug tsawg-zog neutron. Muab hais tias…
Xav txog qhov no, vim li cas cov saw hlau tsis tshwm sim hauv lub tshuab hluav taws xob nuclear?
A nuclear tawg ua tsis tau tshwm sim vim roj tsis yog compact txaus tso cai rau ib qho kev tswj tsis tau chain reaction . Lub MIT reactor muaj ntau cov dej thiab cov ntaub ntawv tseem ceeb uas ua rau cov neutrons qeeb ua ntej lawv mus txog lwm cov fissile atoms.
Tsis tas li ntawd, lub nuclear reactor pib fission li cas? Hloov chaw, lawv faib uranium atoms hauv cov txheej txheem hu ua fission . Thaum lub reactor pib , uranium atoms yuav sib cais, tso tawm neutrons thiab cua sov. Cov neutrons yuav ntaus lwm cov uranium atoms ua rau lawv sib cais thiab txuas ntxiv cov txheej txheem, tsim ntau neutrons thiab kub ntau dua.
Tsis tas li ntawd, cov khoom xyaw dab tsi yuav tsum tau pib cov tshuaj tiv thaiv kab mob hauv lub tshuab hluav taws xob nuclear?
A " chain reaction "yog qhov tseem ceeb rau a nuclear reactor tsim hluav taws xob. Dab tsi yog a chain reaction ? Wb cia pib thaum pib. Thawj active cov khoom xyaw hauv roj rau ib nuclear reactor Nws yog ib qho tshwj xeeb, lossis "isotope," ntawm uranium, hu ua U235.
K siv tau li cas?
Lub multiplication factor uas yuav tsum tau xa mus rau hauv tus account yog lub siv tau multiplication factor ( k eff ua), uas txhais tau tias yog qhov piv ntawm cov neutrons tsim los ntawm fission nyob rau hauv ib tiam mus rau tus naj npawb ntawm neutrons poob los ntawm kev nqus thiab to hauv tiam dhau los.
Pom zoo:
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