Maitiro eKupatsanurwa: Maitiro, Mashandisirwo, uye Migumisiro
Pendauluan
Kupatsanurwa kwemasero (fission reaction) inzira yenyukireya inosanganisira kupatsanurwa kwenucleus hombe yeatomu kuita diki, zvichiteverwa nekuburitswa kwesimba guru. Iyi nzira ndiyo hwaro hwekushandiswa kwakasiyana-siyana musimba, mushonga, uye mauto. Chinyorwa chino chichanyatsoongorora mashandiro ekugadzirisa masero, mashandisirwo awo akasiyana-siyana, uye mhedzisiro yawo.
Maitiro eKuita Kupatsanurwa
Kupatsanuka kwezvikamu kunowanzoitika muzvinhu zvinorema, zvakaita seuranium-235 kana plutonium-239. Kana atomic nucleus inorema ikatora neutron, inova isina kugadzikana uye inopatsanurwa kuita manuclei maviri akareruka, mamwe ma free neutron, uye simba muchimiro chemwaranzi nekupisa. Equation yakajairika ye fission reaction inogona kutsanangurwa seinotevera:
\[ ^{235}_{92}U + n \rightarrow ^{141}_{56}Ba + ^{92}_{36}Kr + 3n + \text{energy} \]
Mukuita uku, manyuturoni anogadzirwa ane mukana wekuti atange kupatsanuka mune mamwe manyuturoni anorema eatomu, zvichikonzera kuti pave nekuchinjana kwecheni. Iyi ndiyo nzira huru inoshandiswa nemagetsi enyukireya nezvombo zvenyukireya.
Simba muKuchinja kweKupera
Simba guru rinobuda mu fission reaction rinobva pakushandurwa kwechikamu che nuclear mass kuita simba, sezvakatsanangurwa ne equation yaEinstein \( E = mc^2 \). Simba rinoburitswa rinogona kusvika paMeV (megaelectronvolts) dzinoverengeka pa fission event imwe chete. Izvi zvakakura kupfuura simba rinoburitswa pa ordinary chemical reaction, uko kazhinji ma eV mashoma (electronvolts) anoburitswa.
Zvikumbiro zveFission Reaction
1. Chiteshi cheMagetsi eNyukireya
Imwe yenzira dzinonyanya kukosha dzekugadzirisa ma "fission reactions" ndeyekugadzira simba renyukireya. Mu "fission reactor", simba rinogadzirwa ne "nuclear fission" rinoshandiswa kupisa mvura, kugadzira utsi, uye kufambisa turbine inogadzira magetsi. Aya ma "reactors" ane zvikamu zvakakosha, zvinosanganisira mafuta enyukireya (uranium kana plutonium), "neutron moderator", uye "control rods".
Zvivakwa zvemagetsi enyukireya zvine zvakanakira zvakawanda, zvinosanganisira kutsungirira kuchinja-chinja kwemitengo yemafuta ekare, kuburitsa magasi anopisa pasi, uye kushanda zvakanaka zvakanyanya. Zvisinei, zvinounzawo matambudziko makuru, anosanganisira kutonga marara ane mwaranzi uye njodzi yekukundikana kwereactor.
2. Zvombo zveNyukireya
Kupatsanurwa kwezvombo zvenyukireya ndikowo hwaro hwekugadzirwa kwezvombo zvenyukireya, zvakaita semabhomba eatomu. Muzvombo izvi, kupatsanurwa kukuru kwezvombo kunokonzerwa munguva pfupi, zvichikonzera kuputika nesimba rinoparadza zvikuru. Kuparadza uku kwakatanga kuoneka panguva yeHondo Yenyika II nekubhombwa kweHiroshima neNagasaki neUnited States.
Kugadzirwa, kuwanikwa, uye kuwanda kwezvombo zvenyukireya zvinomutsa nyaya dzakaoma dzetsika nedzezvematongerwo enyika. Kuedza kwenyika dzakawanda kuburikidza nezvibvumirano zvakaita seNon-Proliferation Treaty (NPT) kunovavarira kudzivirira kuwanda kwezvombo zvenyukireya uye kukurudzira kubviswa kwezvombo zvenyukireya.
3. Zvikumbiro Zvekurapa
Kunyangwe zvisinganyanyo zivikanwe, ma "fission reactions" anoshandawo mukurapa, kunyanya mukugadzirwa kwema radioisotopes ekuongorora nekurapa. Semuenzaniso, isotope technetium-99m, inogadzirwa ne "fission" yeuranium-235, inoshandiswa mukufungidzira kwepositron emission tomography (PET) kuti ione zvirwere zvakasiyana-siyana.
Kugadzirwa kwe radioisotopes kuburikidza ne fission reactions kunoita kuti zvikwanise kuonekwa nekukurumidza uye kurapwa zvinobudirira kwezvirwere zvakaita sekenza, chirwere chemwoyo, uye chirwere che thyroid.
Impact uye Zvikonzero
1. Marara ane mwaranzi
Imwe yenyaya huru pakushandiswa kwe fission reactions ndeyekutarisira marara ane radioactive anokonzerwa nawo. Marara aya ane radioactive isotopes ane hupenyu hwakasiyana-siyana, kubva pamakore mashoma kusvika kumamiriyoni emakore. Kuchengetedza marara ane radioactive zvakachengeteka kunoda tekinoroji yakasarudzika uye mitemo yenguva refu yekuchengetedza vanhu nenharaunda.
2. Njodzi dzekuchengetedza
Kukundikana kwehurongwa hwemagetsi enyukireya kunogona kukonzera zviitiko zvakakomba, zvakaita sezvakaitika panjodzi yeChernobyl muna 1986 uye Fukushima muna 2011. Njodzi idzi dzinosanganisira kuburitswa kwemwaranzi yakawanda inogona kukonzera kukanganisa kwakanyanya hutano nenharaunda.
Pamusoro pezvo, kuwanda kwetekinoroji yenyukireya yezvinangwa zvehondo kunowedzera njodzi dzepasi rose dzinoenderana nekushandiswa kwezvombo zvenyukireya, nenyika nemapoka asiri enyika.
3. Kukanganiswa Kwezvakatipoteredza
Kunyangwe hazvo kupatsanurwa kwegasi kusingaburitse magasi anodziya pasi pevhu panguva yekushanda kwakajairika, maitiro ekuchera uranium, kuwedzera, uye kugadzira mafuta ane mhedzisiro yakaipa kune zvakatipoteredza. Matekinoroji matsva, anoshanda uye akachengeteka ereactor ari kugadzirwa kuderedza mhedzisiro yakaipa iyi.
Remangwana reKuchinjana kweMatambudziko
Kuvandudzwa kwetekinoroji nekutsvagurudza kuri kuenderera mberi kunoita basa rakakosha mukutsvaga mukana wese uye kuderedza njodzi dzekuputika kwemagetsi. Imwe nzvimbo ine tariro ndeyekugadzirwa kwezvigadziriso zvechizvarwa chechina zvakagadzirirwa kuvandudza mashandiro emafuta, kuderedza kugadzirwa kwemarara, uye kusimudzira masisitimu ekuchengetedza.
Uyezve, kubatanidza simba renyukireya nemagetsi anogona kushandiswazve kunogona kubatsira kugadzirisa matambudziko ekushanduka kwemamiriro ekunze uye kuwedzera kuri kuita kudiwa kwesimba repasi rose. Zvirongwa zvekubatanidza nyukireya inzvimbo inonakidza yekutsvagisa, kunyangwe zvichiri kusangana nematambudziko makuru ehunyanzvi zvisati zvaitwa mukutengeserana.
Mhedziso
Kupatsanurwa kwematombo kunokanganisa zvakanyanya hupenyu hwevanhu, kubva pakupa simba kusvika pakushandiswa kwemishonga nekudzivirira nyika. Kunyange hazvo mabhenefiti acho ari makuru, matambudziko ane chekuita nekuchengetedzeka, kutonga marara, uye kukanganisa zvakatipoteredza zvinoda kutariswa nemhinduro nguva dzose. Nharaunda yepasi rose inogona kushandisa tekinoroji yekuputika kwematombo enyukireya chete nekushandisa nzira ine mutoro uye itsva.
