Impact vibrations of guide thimbles in nuclear fuel assembly

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23520%2F17%3A43930839" target="_blank" >RIV/49777513:23520/17:43930839 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1007/s00419-016-1189-6" target="_blank" >http://dx.doi.org/10.1007/s00419-016-1189-6</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s00419-016-1189-6" target="_blank" >10.1007/s00419-016-1189-6</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Impact vibrations of guide thimbles in nuclear fuel assembly

Popis výsledku v původním jazyce

In nuclear fuel assemblies of pressurized water reactors, guide thimbles (GTs) secure a safe control rod insertion. 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.

Název v anglickém jazyce

Impact vibrations of guide thimbles in nuclear fuel assembly

Popis výsledku anglicky

In nuclear fuel assemblies of pressurized water reactors, guide thimbles (GTs) secure a safe control rod insertion. 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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20302 - Applied mechanics

Projekt

<a href="/cs/project/LO1506" target="_blank" >LO1506: Podpora udržitelnosti centra NTIS - Nové technologie pro informační společnost</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

ARCHIVE OF APPLIED MECHANICS

ISSN

0939-1533

e-ISSN

—

Svazek periodika

87

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

14

Strana od-do

231-244

Kód UT WoS článku

000394109700005

EID výsledku v databázi Scopus

2-s2.0-84991087036