Impact vibrations of guide thimbles in nuclear fuel assembly
In nuclear fuel assemblies of pressurized water reactors, guide thimbles (GTs) secure a safe control rod drop. The control rod fall into the GT should be as fast as possible to provide prompt reactor shutdown. The GTs are long thin-walled tubes that are dynamically excited by fuel assembly (FA) comp...
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| Veröffentlicht in: | Archive of applied mechanics (1991) 2017-02, Vol.87 (2), p.231-244 |
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| container_title | Archive of applied mechanics (1991) |
| container_volume | 87 |
| creator | Dyk, Štěpán Zeman, Vladimír |
| description | In nuclear fuel assemblies of pressurized water reactors, guide thimbles (GTs) secure a safe control rod drop. The control rod fall into the GT should be as fast as possible to provide prompt reactor shutdown. The GTs are long thin-walled tubes that are dynamically excited by fuel assembly (FA) components motion caused by pressure pulsations of coolant. GTs are embedded in spacer grid cells and sleeve (SL) with radial clearances. Vibration of FA components, caused by the FA support plates motion in the reactor core, possibly generates impact forces between GT and spacer grids. The presented method introduces an original approach to mathematical modelling and simulation analysis of GT nonlinear vibrations respecting impact and friction forces at all the contact points between GT and spacer grids. The dependence of maximal dynamical lateral GT deformations on radial clearances and stiffnesses of spacer grid cells is analysed. The method is applied to GT in the hexagonal-type FA used in the VVER-type reactors. |
| doi_str_mv | 10.1007/s00419-016-1189-6 |
| format | Article |
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The method is applied to GT in the hexagonal-type FA used in the VVER-type reactors.</description><subject>Assembly</subject><subject>Classical Mechanics</subject><subject>Clearances</subject><subject>Computer simulation</subject><subject>Control rods</subject><subject>Deformation mechanisms</subject><subject>Engineering</subject><subject>Impact loads</subject><subject>Nonlinear analysis</subject><subject>Nuclear fuels</subject><subject>Nuclear reactors</subject><subject>Original</subject><subject>Pressurized water</subject><subject>Pressurized water reactors</subject><subject>Theoretical and Applied Mechanics</subject><subject>Tubes</subject><issn>0939-1533</issn><issn>1432-0681</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><recordid>eNp1kE1LxDAURYMoOI7-AHcB19H3kjZNwI0MfgwMuNF1SNJ07NBpx6QV_PdmqAs3rt7innsfHEKuEW4RoLpLAAVqBigZotJMnpAFFoIzkApPyQK00AxLIc7JRUo7yHjJYUHu1_uD9SP9al20Yzv0iQ4N3U5tHej40e5dFxJte9pPvgs20mYKHbUphZx8X5KzxnYpXP3eJXl_enxbvbDN6_N69bBhXqAcmeeu4rLA2tWKl6gbgVDV4BRIDby0oD3IWpZeBN8UITPWF0pJh9pxz0uxJDfz7iEOn1NIo9kNU-zzS4NKQaXKqsJM4Uz5OKQUQ2MOsd3b-G0QzFGSmSWZLMkcJRmZO3zupMz22xD_LP9b-gFAemhQ</recordid><startdate>20170201</startdate><enddate>20170201</enddate><creator>Dyk, Štěpán</creator><creator>Zeman, Vladimír</creator><general>Springer Berlin Heidelberg</general><general>Springer Nature B.V</general><scope>AAYXX</scope><scope>CITATION</scope><orcidid>https://orcid.org/0000-0003-2008-9463</orcidid></search><sort><creationdate>20170201</creationdate><title>Impact vibrations of guide thimbles in nuclear fuel assembly</title><author>Dyk, Štěpán ; Zeman, Vladimír</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c316t-c2b72641dbd82519f3107d0b8069025a09c06d65c3ecf4e825ac4886b19b2c253</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2017</creationdate><topic>Assembly</topic><topic>Classical Mechanics</topic><topic>Clearances</topic><topic>Computer simulation</topic><topic>Control rods</topic><topic>Deformation mechanisms</topic><topic>Engineering</topic><topic>Impact loads</topic><topic>Nonlinear analysis</topic><topic>Nuclear fuels</topic><topic>Nuclear reactors</topic><topic>Original</topic><topic>Pressurized water</topic><topic>Pressurized water reactors</topic><topic>Theoretical and Applied Mechanics</topic><topic>Tubes</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Dyk, Štěpán</creatorcontrib><creatorcontrib>Zeman, Vladimír</creatorcontrib><collection>CrossRef</collection><jtitle>Archive of applied mechanics (1991)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Dyk, Štěpán</au><au>Zeman, Vladimír</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Impact vibrations of guide thimbles in nuclear fuel assembly</atitle><jtitle>Archive of applied mechanics (1991)</jtitle><stitle>Arch Appl Mech</stitle><date>2017-02-01</date><risdate>2017</risdate><volume>87</volume><issue>2</issue><spage>231</spage><epage>244</epage><pages>231-244</pages><issn>0939-1533</issn><eissn>1432-0681</eissn><abstract>In nuclear fuel assemblies of pressurized water reactors, guide thimbles (GTs) secure a safe control rod drop. The control rod fall into the GT should be as fast as possible to provide prompt reactor shutdown. The GTs are long thin-walled tubes that are dynamically excited by fuel assembly (FA) components motion caused by pressure pulsations of coolant. GTs are embedded in spacer grid cells and sleeve (SL) with radial clearances. Vibration of FA components, caused by the FA support plates motion in the reactor core, possibly generates impact forces between GT and spacer grids. The presented method introduces an original approach to mathematical modelling and simulation analysis of GT nonlinear vibrations respecting impact and friction forces at all the contact points between GT and spacer grids. The dependence of maximal dynamical lateral GT deformations on radial clearances and stiffnesses of spacer grid cells is analysed. 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| ispartof | Archive of applied mechanics (1991), 2017-02, Vol.87 (2), p.231-244 |
| issn | 0939-1533 1432-0681 |
| language | eng |
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| source | SpringerLink Journals |
| subjects | Assembly Classical Mechanics Clearances Computer simulation Control rods Deformation mechanisms Engineering Impact loads Nonlinear analysis Nuclear fuels Nuclear reactors Original Pressurized water Pressurized water reactors Theoretical and Applied Mechanics Tubes |
| title | Impact vibrations of guide thimbles in nuclear fuel assembly |
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