Neutron absorber for VVER-1000 final disposal cask

Result code in 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>

Result on the web

<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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Result language

angličtina

Original language name

Neutron absorber for VVER-1000 final disposal cask

Original language description

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.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

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

Project

<a href="/en/project/TK02010102" target="_blank" >TK02010102: Optimization of Dry Storage for Spent Nuclear Fuel</a><br>

Continuities

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

Publication year

2020

Confidentiality

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

Article name in the collection

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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Number of pages

8

Pages from-to

"1502.1"-"1502.8"

Publisher name

Nuclear Society of Slovenia

Place of publication

Ljubljana

Event location

on-line, Portorož, Slovenia

Event date

Sep 7, 2020

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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