Publication details

Characterization of mixed N/G beam of the VR-1 reactor

Authors

KOŠŤÁL M. LOSA E. MATĚJ Zdeněk JUŘÍČEK V. HARUTYUNYAN D. HUML O. ŠTĚFÁNIK M. CVACHOVEC František MRAVEC Filip SCHULC M. CZAKOJ T. RYPAR V.

Year of publication 2018
Type Article in Periodical
Magazine / Source Annals of Nuclear Energy
MU Faculty or unit

Faculty of Informatics

Citation
Doi http://dx.doi.org/10.1016/j.anucene.2018.08.028
Keywords 235U PFNS; IRT-4M fuel; Reactor Dosimetry; IRDFF; SINBADVR-1; Zero power reactor utilization
Description VR-1 is light water zero-power reactor using IRT-4 M fuel with nominal enrichment of 19.7 wt%, equipped with the radial channel being directly attached to the fuel. Enrichment at the top level of the low enriched uranium limit guarantees that the larger part of non-scattered neutrons in the spectrum is coming from 235U than in case of experimental reactors using enrichments between 2 and 5 wt% (e.g., LR-0). Thus, the measurement of the VR-1 leakage spectrum can be a valuable contribution to the validation process of predicted 235U prompt fission neutron spectrum. Presented second set of measurements is confirming the beam stability at VR-1 and compares the agreement rate in neutron spectrum shape with two benchmarks; light- and heavy water filtered neutron spectrum obtained from spheres. Additionally, gamma spectrum was measured and compared with spherical iron benchmark and VVER-1000 core simulator. Presented measurements have the character of comprehensive characterization of beamline experiments developed at reactor cores with IRT-4 M fuel. Reported good agreement between the experiment and calculation confirm the methodology of using VR-1 as a Mock-Up experiment for benchmarking of high power reactors with IRTM fuel in the neutron transport experiments.