{"title":"测量和预测在D2O中穿孔铁板结构中的中子通量和泄漏","authors":"E. Aalto","doi":"10.1016/0369-5816(65)90144-4","DOIUrl":null,"url":null,"abstract":"<div><p>Detailed neutron flux measurements have been performed in a 48 cm thick configuration of thin regions of Fe and D<sub>2</sub>O (30% of total thickness Fe), both when the Fe regions are massive and when they are penetrated by 15 cm dia. D<sub>2</sub>O channels. It was found that the total leakage of neutrons through the configuration was increased by 25% in the latter case.</p><p>It is shown that this increase and the detailed flux distribution on a duct axis can be satisfactorily predicted by a one-dimensional shielding code when the duct is calculated as a pure D<sub>2</sub>O layer and a radial buckling term is used for the < 1 eV neutrons when penetrating the Fe regions. Another calculation through the massive part of Fe is to be performed in the usual way. It is believed that this 2-component method is usable in a wider range of similar configurations.</p><p>A calculation with regions where the Fe and the D<sub>2</sub>O ducts have been homogenized into a single material overestimates the increase in leakage, and the relative error is greater than that in the 2-component calculation.</p></div>","PeriodicalId":100973,"journal":{"name":"Nuclear Structural Engineering","volume":"2 1","pages":"Pages 142-150"},"PeriodicalIF":0.0000,"publicationDate":"1965-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0369-5816(65)90144-4","citationCount":"0","resultStr":"{\"title\":\"Measured and predicted neutron fluxes in, and leakage through, a configuration of perforated Fe plates in D2O\",\"authors\":\"E. Aalto\",\"doi\":\"10.1016/0369-5816(65)90144-4\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Detailed neutron flux measurements have been performed in a 48 cm thick configuration of thin regions of Fe and D<sub>2</sub>O (30% of total thickness Fe), both when the Fe regions are massive and when they are penetrated by 15 cm dia. D<sub>2</sub>O channels. It was found that the total leakage of neutrons through the configuration was increased by 25% in the latter case.</p><p>It is shown that this increase and the detailed flux distribution on a duct axis can be satisfactorily predicted by a one-dimensional shielding code when the duct is calculated as a pure D<sub>2</sub>O layer and a radial buckling term is used for the < 1 eV neutrons when penetrating the Fe regions. Another calculation through the massive part of Fe is to be performed in the usual way. It is believed that this 2-component method is usable in a wider range of similar configurations.</p><p>A calculation with regions where the Fe and the D<sub>2</sub>O ducts have been homogenized into a single material overestimates the increase in leakage, and the relative error is greater than that in the 2-component calculation.</p></div>\",\"PeriodicalId\":100973,\"journal\":{\"name\":\"Nuclear Structural Engineering\",\"volume\":\"2 1\",\"pages\":\"Pages 142-150\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1965-07-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/0369-5816(65)90144-4\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Nuclear Structural Engineering\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/0369581665901444\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nuclear Structural Engineering","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0369581665901444","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Measured and predicted neutron fluxes in, and leakage through, a configuration of perforated Fe plates in D2O
Detailed neutron flux measurements have been performed in a 48 cm thick configuration of thin regions of Fe and D2O (30% of total thickness Fe), both when the Fe regions are massive and when they are penetrated by 15 cm dia. D2O channels. It was found that the total leakage of neutrons through the configuration was increased by 25% in the latter case.
It is shown that this increase and the detailed flux distribution on a duct axis can be satisfactorily predicted by a one-dimensional shielding code when the duct is calculated as a pure D2O layer and a radial buckling term is used for the < 1 eV neutrons when penetrating the Fe regions. Another calculation through the massive part of Fe is to be performed in the usual way. It is believed that this 2-component method is usable in a wider range of similar configurations.
A calculation with regions where the Fe and the D2O ducts have been homogenized into a single material overestimates the increase in leakage, and the relative error is greater than that in the 2-component calculation.
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