Measurement of various monitors reaction rate in a special core at LR-0 reactor

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26722445%3A_____%2F18%3AN0000009" target="_blank" >RIV/26722445:_____/18:N0000009 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.anucene.2017.10.036" target="_blank" >http://dx.doi.org/10.1016/j.anucene.2017.10.036</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.anucene.2017.10.036" target="_blank" >10.1016/j.anucene.2017.10.036</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Measurement of various monitors reaction rate in a special core at LR-0 reactor

Popis výsledku v původním jazyce

Validation of the selected materials cross sections is an important task for their use as flux monitors within experimental measurements. As the reaction rate is a function of neutron spectrum and material cross section, the neutron spectrum must be well defined for the correct cross section validation. This criterion is met in the special core of the LR-0 reactor, where the reaction rates of Ta-181(n,gamma), Fe-54(n,p), Fe-54 (n,alpha) and Y-89(n,2n) reactions were measured. The Au-197(n,gamma) and Ni-58(n,p) reactions were used as flux monitors during measurements. Results of calculation show that in case of Ta-181(n,gamma) reaction, the values reported in JEFF-3.2 provide a good agreement, while ENDF/B-VII.1 is underpredicting the experiment. In case of Fe-54(n,p) reaction, JEFF-3.2 is in satisfactory agreement, while ENDF/E-VII.1 overpredicts the result by about 10%. The Fe-54(n,alpha) shows significant discrepancies, JEFF-3.2 under predicts by about 20%, while ENDF/B-VII.1 overpredicts result by 40%. The high threshold Y-89(n,2n) reaction is interesting from the point of view of spectral averaged cross section. It is worth noting that the resulted spectral averaged cross section, being 0.169 with 16 uncertainty of 0.007 mb, is in very good agreement with previous result, being 0.172 +/- 0.006 mb.

Název v anglickém jazyce

Measurement of various monitors reaction rate in a special core at LR-0 reactor

Popis výsledku anglicky

Validation of the selected materials cross sections is an important task for their use as flux monitors within experimental measurements. As the reaction rate is a function of neutron spectrum and material cross section, the neutron spectrum must be well defined for the correct cross section validation. This criterion is met in the special core of the LR-0 reactor, where the reaction rates of Ta-181(n,gamma), Fe-54(n,p), Fe-54 (n,alpha) and Y-89(n,2n) reactions were measured. The Au-197(n,gamma) and Ni-58(n,p) reactions were used as flux monitors during measurements. Results of calculation show that in case of Ta-181(n,gamma) reaction, the values reported in JEFF-3.2 provide a good agreement, while ENDF/B-VII.1 is underpredicting the experiment. In case of Fe-54(n,p) reaction, JEFF-3.2 is in satisfactory agreement, while ENDF/E-VII.1 overpredicts the result by about 10%. The Fe-54(n,alpha) shows significant discrepancies, JEFF-3.2 under predicts by about 20%, while ENDF/B-VII.1 overpredicts result by 40%. The high threshold Y-89(n,2n) reaction is interesting from the point of view of spectral averaged cross section. It is worth noting that the resulted spectral averaged cross section, being 0.169 with 16 uncertainty of 0.007 mb, is in very good agreement with previous result, being 0.172 +/- 0.006 mb.

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

Annals of Nuclear Energy

ISSN

0306-4549

e-ISSN

—

Svazek periodika

112

Číslo periodika v rámci svazku

February

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

759-768

Kód UT WoS článku

000419409100064

EID výsledku v databázi Scopus

2-s2.0-85034045194