The effect of heavy reflector on neutronic parameters of core

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26722445%3A_____%2F22%3AN0000061" target="_blank" >RIV/26722445:_____/22:N0000061 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0306454921007751" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0306454921007751</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.anucene.2021.108898" target="_blank" >10.1016/j.anucene.2021.108898</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The effect of heavy reflector on neutronic parameters of core

Popis výsledku v původním jazyce

The reactor baffle is an important component of a nuclear reactor that fixes the location of the fuel assembly in the reactor core. The main types of baffles are called light or heavy. The light baffle has mostly the form of steel plates with outer space filled by water, and the heavy baffle is mostly a forged steel element. Both concepts have advantages as well as disadvantages. In the case of the light baffle, one does not need to solve the issue of void swelling, but the neutron economy is not ideal, while the heavy baffle has a good neutron economy, but void swelling is an issue. This paper deals with the effect of the heavy VVER-1000 baffle on criticality. Criticality was measured using a well-defined core composed of 6 fuel assemblies moved to a simulator of the VVER-1000 internals, which is located at the LR-0 reactor. The experiments confirm the fact that the water filling the cooling channels in the baffle has a strong neutron-absorbing effect. The keff calculated using the ENDF/B-VIII.0 library significantly underpredicts the experiment. The calculations using a new evaluation of Fe-56 by the IAEA (INDEN collaboration) do not improve the situation significantly. Generally, the presented results are suitable for the validation of iron cross sections.

Název v anglickém jazyce

The effect of heavy reflector on neutronic parameters of core

Popis výsledku anglicky

The reactor baffle is an important component of a nuclear reactor that fixes the location of the fuel assembly in the reactor core. The main types of baffles are called light or heavy. The light baffle has mostly the form of steel plates with outer space filled by water, and the heavy baffle is mostly a forged steel element. Both concepts have advantages as well as disadvantages. In the case of the light baffle, one does not need to solve the issue of void swelling, but the neutron economy is not ideal, while the heavy baffle has a good neutron economy, but void swelling is an issue. This paper deals with the effect of the heavy VVER-1000 baffle on criticality. Criticality was measured using a well-defined core composed of 6 fuel assemblies moved to a simulator of the VVER-1000 internals, which is located at the LR-0 reactor. The experiments confirm the fact that the water filling the cooling channels in the baffle has a strong neutron-absorbing effect. The keff calculated using the ENDF/B-VIII.0 library significantly underpredicts the experiment. The calculations using a new evaluation of Fe-56 by the IAEA (INDEN collaboration) do not improve the situation significantly. Generally, the presented results are suitable for the validation of iron cross sections.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

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

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

Annals of Nuclear Energy

ISSN

0306-4549

e-ISSN

1873-2100

Svazek periodika

168

Číslo periodika v rámci svazku

April

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

12

Strana od-do

112

Kód UT WoS článku

000793275700004

EID výsledku v databázi Scopus

2-s2.0-85121333297