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

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

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

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

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

Publication year

2018

Confidentiality

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

Name of the periodical

Annals of Nuclear Energy

ISSN

0306-4549

e-ISSN

—

Volume of the periodical

112

Issue of the periodical within the volume

February

Country of publishing house

GB - UNITED KINGDOM

Number of pages

10

Pages from-to

759-768

UT code for WoS article

000419409100064

EID of the result in the Scopus database

2-s2.0-85034045194