Nonlinear Vibration of Nuclear Fuel Rods

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23520%2F17%3A43929337" target="_blank" >RIV/49777513:23520/17:43929337 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1007/978-3-319-44087-3_24" target="_blank" >http://dx.doi.org/10.1007/978-3-319-44087-3_24</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/978-3-319-44087-3_24" target="_blank" >10.1007/978-3-319-44087-3_24</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Nonlinear Vibration of Nuclear Fuel Rods

Popis výsledku v původním jazyce

The paper deals with nonlinear vibration of nuclear fuel rods in hexagonal-type fuel assemblies. The fuel rod is considered as a system consisting of two impact-interacting beam-type subsystems. Outer subsystem is a fuel rod cladding in the form of a long and thin zirconium tube supported at several levels by prestressed spacer grid cells. Inside the cladding, a fuel pellets stack is situated that is axially prestressed by fixation spring. Between both subsystems, there is a little clearance. During a vibration caused by pressure pulsations of coolant, impact vibration occurs between both subsystems. The impacts are described by the model including possible stick, slip and separation phases. At the levels of spacer grids, bending vibration causes fretting wear of cladding. The aim of this paper is to perform numerical simulations to estimate fretting wear dependence on a phase of operational cycle. A specific phase in operational cycle is characterised by several parameters, such as clearance between both subsystems, prestress of spacer grid cells and a force of fixation spring.

Název v anglickém jazyce

Nonlinear Vibration of Nuclear Fuel Rods

Popis výsledku anglicky

The paper deals with nonlinear vibration of nuclear fuel rods in hexagonal-type fuel assemblies. The fuel rod is considered as a system consisting of two impact-interacting beam-type subsystems. Outer subsystem is a fuel rod cladding in the form of a long and thin zirconium tube supported at several levels by prestressed spacer grid cells. Inside the cladding, a fuel pellets stack is situated that is axially prestressed by fixation spring. Between both subsystems, there is a little clearance. During a vibration caused by pressure pulsations of coolant, impact vibration occurs between both subsystems. The impacts are described by the model including possible stick, slip and separation phases. At the levels of spacer grids, bending vibration causes fretting wear of cladding. The aim of this paper is to perform numerical simulations to estimate fretting wear dependence on a phase of operational cycle. A specific phase in operational cycle is characterised by several parameters, such as clearance between both subsystems, prestress of spacer grid cells and a force of fixation spring.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20301 - Mechanical engineering

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 statě ve sborníku

Advance in Mechanism Design II

ISBN

978-3-319-44086-6

ISSN

2211-0984

e-ISSN

neuvedeno

Počet stran výsledku

6

Strana od-do

185-190

Název nakladatele

Springer

Místo vydání

Cham

Místo konání akce

Liberec

Datum konání akce

6. 9. 2016

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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