{"title":"Modeling of the Composition of the Gas Phase over Uranium–Plutonium Mononitride Containing Oxygen Impurities and Fission Products","authors":"G. S. Bulatov, K. E. German","doi":"10.1134/S1066362225010059","DOIUrl":null,"url":null,"abstract":"<p>The composition of the gas phase over uranium–plutonium nitride U<sub>0.8</sub>Pu<sub>0.2</sub>N<sub>0.995</sub>0<sub>0.005</sub> containing oxygen impurities and fission products after fast neutron irradiation to a burnup of 13.6% heavy atoms (h.a.) was subjected to a thermodynamic analysis in the temperature interval 900–2000 K. In this interval, the accumulation of fission products in the fuel leads to the formation of a multicomponent gas phase containing the following main elements and compounds: fuel species (Pu, PuO, PuN, U, UO, UN), highly volatile species (Cs, N<sub>2</sub>, Ba, Sr, CsI, BaI, SrI, I), volatile species (Te, Pd, BaO, NdO, LaO, SrO, CeO), low-volatile metals (Nd, Mo, Y, Tc, La, Ce, Zr), and low-volatile nitrides (NdN, LaN, CeN, YN, ZrN). The partial pressures of these components of the gas phase over U<sub>0.8</sub>Pu<sub>0.2</sub>N<sub>0.995</sub>0<sub>0.005</sub> at the 13.6% burnup as functions of temperature were calculated.</p>","PeriodicalId":747,"journal":{"name":"Radiochemistry","volume":"67 1","pages":"31 - 38"},"PeriodicalIF":0.9000,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Radiochemistry","FirstCategoryId":"1085","ListUrlMain":"https://link.springer.com/article/10.1134/S1066362225010059","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"CHEMISTRY, INORGANIC & NUCLEAR","Score":null,"Total":0}
引用次数: 0
Abstract
The composition of the gas phase over uranium–plutonium nitride U0.8Pu0.2N0.99500.005 containing oxygen impurities and fission products after fast neutron irradiation to a burnup of 13.6% heavy atoms (h.a.) was subjected to a thermodynamic analysis in the temperature interval 900–2000 K. In this interval, the accumulation of fission products in the fuel leads to the formation of a multicomponent gas phase containing the following main elements and compounds: fuel species (Pu, PuO, PuN, U, UO, UN), highly volatile species (Cs, N2, Ba, Sr, CsI, BaI, SrI, I), volatile species (Te, Pd, BaO, NdO, LaO, SrO, CeO), low-volatile metals (Nd, Mo, Y, Tc, La, Ce, Zr), and low-volatile nitrides (NdN, LaN, CeN, YN, ZrN). The partial pressures of these components of the gas phase over U0.8Pu0.2N0.99500.005 at the 13.6% burnup as functions of temperature were calculated.
期刊介绍：
Radiochemistry is a journal that covers the theoretical and applied aspects of radiochemistry, including basic nuclear physical properties of radionuclides; chemistry of radioactive elements and their compounds; the occurrence and behavior of natural and artificial radionuclides in the environment; nuclear fuel cycle; radiochemical analysis methods and devices; production and isolation of radionuclides, synthesis of labeled compounds, new applications of radioactive tracers; radiochemical aspects of nuclear medicine; radiation chemistry and after-effects of nuclear transformations.
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