Improvement of Geant4 Neutron-HP package: Doppler broadening of the neutron elastic scattering kernel

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26722445%3A_____%2F23%3AN0000031" target="_blank" >RIV/26722445:_____/23:N0000031 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21340/23:00381354

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0306454923002682" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0306454923002682</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.anucene.2023.109949" target="_blank" >10.1016/j.anucene.2023.109949</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Improvement of Geant4 Neutron-HP package: Doppler broadening of the neutron elastic scattering kernel

Popis výsledku v původním jazyce

Whether it is for shielding applications or for safety criticality studies, numerically solving the neutron transport equation with a good accuracy requires to precisely estimate the Doppler broadened elastic scattering kernel in the thermal and epithermal energy range of neutrons travelling in a free gas. In Geant4, low energy neutrons are transported using evaluated data libraries handled by the Neutron High-Precision (Neutron-HP) package. Version 11.00.p03 of the code features in particular the Doppler broadened elastic scattering kernel, provided by the so-called 'Sampling of the Velocity of the Target' (SVT) method. However this latter fails for resonant heavy nuclei such as U-238 and can severely impact the solving of the Boltzmann equation in fissile media. To overcome this shortcoming, the Doppler Broadening Rejection Correction (DBRC) method has been implemented in Geant4 and successfully validated with the reference Monte Carlo neutron transport code Tripoli-4 (R) (version 11). This development will be taken into account in the next release of the code. All the validations have been performed with an automated benchmark tool which has been designed to support the quality assurance of the Geant4 Neutron-HP package. This tool is currently available on an ad hoc Gitlab repository and will be included in Geant4.

Název v anglickém jazyce

Improvement of Geant4 Neutron-HP package: Doppler broadening of the neutron elastic scattering kernel

Popis výsledku anglicky

Whether it is for shielding applications or for safety criticality studies, numerically solving the neutron transport equation with a good accuracy requires to precisely estimate the Doppler broadened elastic scattering kernel in the thermal and epithermal energy range of neutrons travelling in a free gas. In Geant4, low energy neutrons are transported using evaluated data libraries handled by the Neutron High-Precision (Neutron-HP) package. Version 11.00.p03 of the code features in particular the Doppler broadened elastic scattering kernel, provided by the so-called 'Sampling of the Velocity of the Target' (SVT) method. However this latter fails for resonant heavy nuclei such as U-238 and can severely impact the solving of the Boltzmann equation in fissile media. To overcome this shortcoming, the Doppler Broadening Rejection Correction (DBRC) method has been implemented in Geant4 and successfully validated with the reference Monte Carlo neutron transport code Tripoli-4 (R) (version 11). This development will be taken into account in the next release of the code. All the validations have been performed with an automated benchmark tool which has been designed to support the quality assurance of the Geant4 Neutron-HP package. This tool is currently available on an ad hoc Gitlab repository and will be included in Geant4.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10304 - Nuclear physics

Projekt

<a href="/cs/project/LM2023041" target="_blank" >LM2023041: České mezinárodní centrum výzkumných reaktorů</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

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

192

Číslo periodika v rámci svazku

November

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

7

Strana od-do

1-7

Kód UT WoS článku

001021510100001

EID výsledku v databázi Scopus

2-s2.0-85161289202