Y hom kua lim tshuaj xyuas cov khoom uas muaj Alpha emitters hauv cov dej tuag hauv Reactor Annular Chamber ntawm Chav 2 ntawm Fukushima Daiichi Nuclear Fais Fab Cog

Ua tsaug rau koj tuaj xyuas https://likvchina.goodao.net/, koj siv lub browser version txhawb rau CSS co., LTD. Rau qhov kev paub zoo tshaj plaws, peb xav kom koj siv qhov browser tshiab (lossis tig hom kev sib raug zoo hauv Internet Explorer). Nyob rau lub sijhawm no, txhawm rau ua kom muaj kev txhawb nqa txuas ntxiv, peb yuav tso saib lub vev xaib tsis muaj qauv thiab JavaScript. Cov khoom uas muaj alpha (α) nuclides tau pom nyob rau hauv sediments nyob rau hauv cov dej ncig ntawm reactor no. 2 ntawm Fukushima Daiichi Nuclear Power Plant (FDiNPS). Uranium (U), qhov tseem ceeb ntawm cov roj hluav taws xob nuclear, tau txheeb xyuas los ntawm kev tshuaj ntsuam xyuas electron microscope (SEM). Lwm cov α -nuclides (plutonium [Pu], americium [Am] thiab Curium [Cm]) tau kuaj pom los ntawm α locus, thiab cov morphology ntawm α -nuclide hais tau soj ntsuam los ntawm SEM zog spectrum tsom xam (EDX). Ob peb uranium hais txog ntawm submicron mus rau ob peb microns tau pom los ntawm kev tshuaj xyuas electron microscopy. Cov khoom no muaj zirconium (Zr) thiab lwm yam khoom uas ua rau roj cladding thiab cov khoom siv. 235U / 238U isotope piv nyob rau hauv cov khoom feem (suav nrog U hais) yog zoo ib yam nrog cov nuclear roj pom nyob rau hauv reactor no. 2. Qhov no qhia tau hais tias uranium ntawm tib cov roj muaj pes tsawg leeg ua finer. Cov khoom uas muaj nuclides txheeb xyuas los ntawm alpha trajectory tsom xam muaj qhov loj ntawm kaum mus rau pua pua microns. EDX spectroscopic tsom xam pom tias cov khoom no feem ntau muaj hlau. Pu, Am thiab Cm yog adsorbed ntawm Fe hais vim qhov me me ntawm α -nuclide. Txoj kev tshawb no qhia txog qhov sib txawv ntawm cov hom tseem ceeb ntawm U thiab lwm yam alpha nuclides hauv hydroponic deposits ntawm lub annular chamber ntawm FDiNPS 2 reactor. Tepco's Fukushima Daiichi nuclear fais fab nroj tsuag (FDiNPS) tau tawg loj heev los ntawm lub Peb Hlis 11, 2011 av qeeg thiab ua rau tsunami. Thaum lub sij hawm, units 1-3 ntawm rau lub reactors tau ua hauj lwm, thiab nuclear roj nyob rau hauv units 1-3 puas. Cov dej hiav txwv thiab dej tshiab yog txhaj los tshem tawm cov cua sov los ntawm cov roj nuclear. Cov dej tseem nyob hauv qab daus ntawm lub tsev, qhov twg cov khoom siv ntawm cov roj nuclear yaj, tsim kom muaj lub pas dej muaj zog heev. Cov dej tuag muaj radionuclides xws li cov khoom fission thiab nuclear roj actinides. Tsim cov txheej txheem kev kho tshuaj kom tshem tawm radionuclides, tsim kom muaj kev tsim hluav taws xob, thiab rov ua kom cov dej txias kom rov qab siv dua. Txij thaum ntawd los, cov dej sawv ntsug tau maj mam txo qis, tab sis cov khoom zoo uas muaj ntau dua ntawm alpha (α) radionuclides tau pom nyob hauv av hauv cov tsev reactor. Concentrations ntawm alpha nuclides (102-105 Bq / L) nyob rau hauv cov dej sawv, nrog rau cov sediment, yog siab tshaj nyob rau hauv cov dej txias nyob rau hauv downstream tsev. Radiated radionuclides, xws li uranium (U) thiab plutonium (Pu), tuaj yeem ua rau raug mob hnyav thaum lawv nkag mus rau hauv lub cev. α -nuclide yog lub ntsiab nuclide ntawm cov khoom fission thiab yuav tsum tau tswj nruj me ntsis piv nrog cesium (Cs)-137 thiab strontium (Sr)-90. Cov txheej txheem rau kev tshem tawm cov alpha nuclides los ntawm cov dej sawv ntsug yuav tsum tau tsim. Txog rau qhov kawg no, cov dej nyob ruaj khov tau muab khaws cia rau hauv lub voj voog nyob hauv qab daus ntawm lub tsev reactor ntawm chav tsev 2, thiab cov sediment nyob rau hauv cov dej stagnant tau txheeb xyuas los ntawm kev tshuaj ntsuam radiochemical. Cov qauv uas muaj cov sludge sib xyaw los ntawm lub tsev reactor cov dej sawv ntsug tau lees paub tias muaj alpha radionuclides. Txhawm rau txuas ntxiv kho cov dej tsis tu ncua tob hauv cov tsev reactor yav tom ntej, kev nkag siab zoo dua ntawm ntau hom alpha emitters yog xav tau, tshwj xeeb tshaj yog cov uas muaj cov khib nyiab hauv cov dej tsis ruaj. Hauv txoj kev tshawb no, u radioactive particles txuam nrog Cs particles (CsMPs) tau kuaj pom sab nraum qhov chaw FDiNPS, thiab lawv lub cev thiab tshuaj muaj pes tsawg leeg thiab morphology raug tshuaj xyuas 3, 4, 5, 6, 7, 8. Abe et al. sau CsMPs tawm los ntawm FDiNPS los ntawm huab cua thiab tshuaj xyuas lawv siv synchronous X-rays los ntes U hauv CsMPs. Ochiai et al. kuaj pom ntau pua nanometers ntawm U hais hauv CsMP los ntawm SEM-EDX tsom xam. Cov qauv diffraction ntawm UO2 ntawm magnetite tau pom los ntawm kev xa hluav taws xob tshuab hluav taws xob, thiab cov txiaj ntsig tau cuam tshuam qhov muaj pes tsawg leeg ntawm UO2. Ib yam li ntawd, cov qauv diffraction ntawm UO2 thiab zirconia tau txais rau cov khoom sib xyaw ntawm Zr thiab U hauv CSMP. Qhov no qhia tias U muaj nyob hauv CsMP hauv daim ntawv ntawm UO2 thiab U-Zr nanocrystals. Kurihara et al. 8 txheeb xyuas cov isotope ratios ntawm 235U thiab 238U hauv CsMP los ntawm nanoscale sub-ion mass spectrometry thiab pom tias muaj U nyob rau hauv cov roj muaj pes tsawg leeg ntawm reactor no. 2 hauv CsMP. Av tsom xam 9, 10, 11, 12, 13, cov khoom siv hauv huab cua thiab CsMPs7 kuj tau tshaj tawm cov kev tso tawm roj los ntawm polyurethanes rau hauv ib puag ncig. Tus Buddha