Neutron absorber for VVER-1000 final disposal cask

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23220%2F20%3A43960531" target="_blank" >RIV/49777513:23220/20:43960531 - isvavai.cz</a>

Výsledek na webu

<a href="https://arhiv.djs.si/proc/nene2020/pdf/NENE2020_1502.pdf" target="_blank" >https://arhiv.djs.si/proc/nene2020/pdf/NENE2020_1502.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Neutron absorber for VVER-1000 final disposal cask

Popis výsledku v původním jazyce

The recent increasing demand for better nuclear fuel utilization requires higher enriched uranium fuels which is a challenge for spent fuel handling facilities in all countries with nuclear power plants. The operation with higher enriched fuels leads to reduced reserves to legislative and safety limits of spent fuel transport, storage and final disposal facilities. In some cases, the required boron amount in the absorber plates or tubes can be higher than current metallurgy processes allows. This study addresses the neutron absorber solution with significantly increased nuclear safety and improved economics where a new concept of inseparable neutron absorber is introduced to achieve fuel reactivity decrease. Same or better criticality safety is achieved with significantly lower or even no boron content in the cask basket absorber when compared to current concepts. Alternatively, it is possible to reduce fuel assembly pitch with the same boron amount and subsequently decrease overall cask dimensions and its cost. Because of less strict requirements for absorber material when compared to active core environment and better spatial position inside spent fuel handling facility, the choice of absorber material expands currently used boron element. Erbium, cadmium, gadolinium, hafnium, samaria and dysprosium elements are among the most suitable materials. Criticality safety analysis of the recent VVER-1000 final disposal cask with 3 fuel assemblies is performed with the new neutron absorber concept.

Název v anglickém jazyce

Neutron absorber for VVER-1000 final disposal cask

Popis výsledku anglicky

The recent increasing demand for better nuclear fuel utilization requires higher enriched uranium fuels which is a challenge for spent fuel handling facilities in all countries with nuclear power plants. The operation with higher enriched fuels leads to reduced reserves to legislative and safety limits of spent fuel transport, storage and final disposal facilities. In some cases, the required boron amount in the absorber plates or tubes can be higher than current metallurgy processes allows. This study addresses the neutron absorber solution with significantly increased nuclear safety and improved economics where a new concept of inseparable neutron absorber is introduced to achieve fuel reactivity decrease. Same or better criticality safety is achieved with significantly lower or even no boron content in the cask basket absorber when compared to current concepts. Alternatively, it is possible to reduce fuel assembly pitch with the same boron amount and subsequently decrease overall cask dimensions and its cost. Because of less strict requirements for absorber material when compared to active core environment and better spatial position inside spent fuel handling facility, the choice of absorber material expands currently used boron element. Erbium, cadmium, gadolinium, hafnium, samaria and dysprosium elements are among the most suitable materials. Criticality safety analysis of the recent VVER-1000 final disposal cask with 3 fuel assemblies is performed with the new neutron absorber concept.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20305 - Nuclear related engineering; (nuclear physics to be 1.3);

Projekt

<a href="/cs/project/TK02010102" target="_blank" >TK02010102: Optimalizace skladování použitého jaderného paliva</a><br>

Návaznosti

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

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings : 29th International Conference Nuclear Energy for New Europe (NENE 2020)

ISBN

978-961-6207-49-2

ISSN

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e-ISSN

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Počet stran výsledku

8

Strana od-do

"1502.1"-"1502.8"

Název nakladatele

Nuclear Society of Slovenia

Místo vydání

Ljubljana

Místo konání akce

on-line, Portorož, Slovenia

Datum konání akce

7. 9. 2020

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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