Modelling of the impact of local effects on fuel-cladding interaction during power ramp

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46356088%3A_____%2F14%3A%230001654" target="_blank" >RIV/46356088:_____/14:#0001654 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1115/ICONE22-30807" target="_blank" >http://dx.doi.org/10.1115/ICONE22-30807</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1115/ICONE22-30807" target="_blank" >10.1115/ICONE22-30807</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Modelling of the impact of local effects on fuel-cladding interaction during power ramp

Popis výsledku v původním jazyce

The power increase rate of the reactor is often derived using the fuel performance code. Too restrictive rates are not desirable since they lead to the loss of production. On the other hand fast increase or not well controlled axial power oscillation mayresult in the rod failure due to pellet-cladding interaction. Most of the currently used fuel performance codes treat the stack of the fuel pellets using a simplified ?1.5D? approach where individual pellets are not distinguished and the fuel stack is taken to be symmetrical. In reality, several effects must be taken into account when more accurate description is required. These local effects include contact at pellet-pellet interface, fuel pellet cracking under thermal stress, fabrication defects pellets or azimuthal asymmetry in the heat generation or heat transfer conditions due to rod bowing or presence of control rods. Detailed models of the local phenomena are therefore being developed at ÚJV Řež using the ABAQUS 6.12 code and us

Název v anglickém jazyce

Modelling of the impact of local effects on fuel-cladding interaction during power ramp

Popis výsledku anglicky

The power increase rate of the reactor is often derived using the fuel performance code. Too restrictive rates are not desirable since they lead to the loss of production. On the other hand fast increase or not well controlled axial power oscillation mayresult in the rod failure due to pellet-cladding interaction. Most of the currently used fuel performance codes treat the stack of the fuel pellets using a simplified ?1.5D? approach where individual pellets are not distinguished and the fuel stack is taken to be symmetrical. In reality, several effects must be taken into account when more accurate description is required. These local effects include contact at pellet-pellet interface, fuel pellet cracking under thermal stress, fabrication defects pellets or azimuthal asymmetry in the heat generation or heat transfer conditions due to rod bowing or presence of control rods. Detailed models of the local phenomena are therefore being developed at ÚJV Řež using the ABAQUS 6.12 code and us

Druh

D - Stať ve sborníku

CEP obor

JF - Jaderná energetika

OECD FORD obor

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Projekt

—

Návaznosti

N - Vyzkumna aktivita podporovana z neverejnych zdroju

Rok uplatnění

2014

Kód důvěrnosti údajů

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

Název statě ve sborníku

2014 22nd International Conference on Nuclear Engineering Volume 1

ISBN

978-0-7918-4589-9

ISSN

—

e-ISSN

—

Počet stran výsledku

7

Strana od-do

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Název nakladatele

ASME

Místo vydání

New York, USA

Místo konání akce

Praha

Datum konání akce

1. 1. 2014

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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