Publication details

Measurements of neutron transport of well defined silicon filtered beam in lead

Authors

KOŠŤÁL M. SCHULC M. ŠOLTÉS J. LOSA E. VIERERBL L. MATĚJ Zdeněk CVACHOVEC F. RYPRA V.

Year of publication 2018
Type Article in Periodical
Magazine / Source Applied Radiation and Isotopes
MU Faculty or unit

Faculty of Informatics

Citation
Web https://www.sciencedirect.com/science/article/pii/S0969804318301921?via%3Dihub
Doi http://dx.doi.org/10.1016/j.apradiso.2018.08.028
Keywords LVR-15; Neutron spectrometry; Stilbene; Detector calibration; Si neutron filter; Reactor dosimetry
Attached files
Description The correct description of neutron transport in lead is an essential task for correct description of tritium production in the DEMO (DEMOnstration Power Station) breeding blanket because some concepts deal with lead as a major component: namely the WCLL (water cooled lithium lead blanket), HCLL (helium cooled lithium lead blanket), and DCLL (dual cooled lithium lead blanket). Concerning the improvement of the knowledge about the transport of fast neutrons in lead, a set of experiments and calculations was carried out to study this problem with a well-defined neutron beam. The neutron flux behind various lead arrangements positioned along the beam axis was measured using a stilbene scintillation crystal (10 mm × 10 mm) with neutron and gamma pulse shape discrimination. The measurement was performed along the beam axis and in the case of the thick target also above the axis, to estimate the neutron angular scatter in lead. The calculations were realized using MCNP6 with various nuclear data libraries. Discrepancies in the angular distribution description in the energy region of about 1 MeV were discovered by these experiments.