Validation of nickel isotopes neutron cross sections using nickel spherical benchmark

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26722445%3A_____%2F18%3AN0000025" target="_blank" >RIV/26722445:_____/18:N0000025 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.apradiso.2018.07.030" target="_blank" >http://dx.doi.org/10.1016/j.apradiso.2018.07.030</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.apradiso.2018.07.030" target="_blank" >10.1016/j.apradiso.2018.07.030</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Validation of nickel isotopes neutron cross sections using nickel spherical benchmark

Popis výsledku v původním jazyce

The fast leakage neutron spectra have been measured on spherical nickel benchmark assembly of diameter 50 cm. The( 252)Cf neutron source with approximate emission of 5.0.10(8) n/s was placed into the centre of the sphere. Fast neutron spectrum in the range of 1-10 MeV was measured in the distance of 1 m from the sphere centre by means of proton recoil method using scintillation stilbene crystal. The experimental data were compared to transport calculations based on several evaluated nuclear data libraries using MCNP6. MCNP6 was compared with SCALE/MONACO program using the same ENDF/B-VII.1 library which leads to different differential neutron flux results. Best experimental agreement with calculation in MCNP6 is achieved with ENDF/B-VII.1 library. Contrary, worst agreement is achieved with JENDL-4.0 and CENDL-3.1 libraries. Furthermore, cross section sensitivity analysis for elastic and inelastic scattering for both main nickel isotopes ( Ni-58, Ni-60) was performed. It was shown that Ni-58 isotope has higher influence on the result than( 60)Ni isotope in the entire energy range under study. The highest influence has the elastic XS of( 58)Ni around energy of 1.5 MeV. The inelastic cross section (XS) of Ni-58 dominates in the energies above 2 MeV where two percent rise due to the inelastic XS leads up to 3.3% decrease in the neutron flux.

Název v anglickém jazyce

Validation of nickel isotopes neutron cross sections using nickel spherical benchmark

Popis výsledku anglicky

The fast leakage neutron spectra have been measured on spherical nickel benchmark assembly of diameter 50 cm. The( 252)Cf neutron source with approximate emission of 5.0.10(8) n/s was placed into the centre of the sphere. Fast neutron spectrum in the range of 1-10 MeV was measured in the distance of 1 m from the sphere centre by means of proton recoil method using scintillation stilbene crystal. The experimental data were compared to transport calculations based on several evaluated nuclear data libraries using MCNP6. MCNP6 was compared with SCALE/MONACO program using the same ENDF/B-VII.1 library which leads to different differential neutron flux results. Best experimental agreement with calculation in MCNP6 is achieved with ENDF/B-VII.1 library. Contrary, worst agreement is achieved with JENDL-4.0 and CENDL-3.1 libraries. Furthermore, cross section sensitivity analysis for elastic and inelastic scattering for both main nickel isotopes ( Ni-58, Ni-60) was performed. It was shown that Ni-58 isotope has higher influence on the result than( 60)Ni isotope in the entire energy range under study. The highest influence has the elastic XS of( 58)Ni around energy of 1.5 MeV. The inelastic cross section (XS) of Ni-58 dominates in the energies above 2 MeV where two percent rise due to the inelastic XS leads up to 3.3% decrease in the neutron flux.

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

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Applied Radiation and Isotopes

ISSN

0969-8043

e-ISSN

—

Svazek periodika

140

Číslo periodika v rámci svazku

October

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

5

Strana od-do

247-251

Kód UT WoS článku

000445308700038

EID výsledku v databázi Scopus

2-s2.0-85050755530