Validation of Monte-Carlo methods for generation time and delayed neutron fraction predictions

TY - JOUR

T1 - Validation of Monte-Carlo methods for generation time and delayed neutron fraction predictions

AU - Wagemans, Jan

AU - Baeten, Peter

AU - Kochetkov, Anatoly

AU - Perret, Grégory

AU - Blaise, Patrick D.

AU - Messaoudi, Nadia

AU - Geslot, Benoit

AU - Pautz, Andreas

N1 - Score=10

PY - 2016/11/1

Y1 - 2016/11/1

N2 - The capability of Monte-Carlo codes to predict kinetic parameters of nuclear systems is validated against a series of experiments in zero-power reactors. Experimental data are issued from facilities operated by the CEA, SCK.CEN and PSI research institutes and analyzed in the framework of the Venus–Eole–Proteus international collaboration. Facilities were configured to study several reactor types (high temperature reactors, light water reactors, material testing reactors, accelerator driven system demonstrators) and type of spectra (thermal, epithermal and fast). Monte-Carlo codes are used to predict the effective generation time and in some cases the effective delayed neutron fraction. The benchmarked codes are MCNP5 and MCNPX coupled to the LAMBDA scripts developed at SCK.CEN. Generation time predictions from the two codes agree within 2.5% for values larger than 1 s but have larger discrepancies (up to 7%) for faster systems. Discrepancies with the measured values depend largely on the selected experiment and can reach up to 9%. Delayed neutron predictions with MCNP5 compare well (3–4%) with all measurements.

AB - The capability of Monte-Carlo codes to predict kinetic parameters of nuclear systems is validated against a series of experiments in zero-power reactors. Experimental data are issued from facilities operated by the CEA, SCK.CEN and PSI research institutes and analyzed in the framework of the Venus–Eole–Proteus international collaboration. Facilities were configured to study several reactor types (high temperature reactors, light water reactors, material testing reactors, accelerator driven system demonstrators) and type of spectra (thermal, epithermal and fast). Monte-Carlo codes are used to predict the effective generation time and in some cases the effective delayed neutron fraction. The benchmarked codes are MCNP5 and MCNPX coupled to the LAMBDA scripts developed at SCK.CEN. Generation time predictions from the two codes agree within 2.5% for values larger than 1 s but have larger discrepancies (up to 7%) for faster systems. Discrepancies with the measured values depend largely on the selected experiment and can reach up to 9%. Delayed neutron predictions with MCNP5 compare well (3–4%) with all measurements.

KW - Generation time

KW - Delayed neutron fraction

KW - Monte Carlo code

KW - Validation

UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/35762971

U2 - 10.1016/j.anucene.2016.07.015

DO - 10.1016/j.anucene.2016.07.015

M3 - Article

VL - 97

SP - 165

EP - 170

JO - Annals of nuclear energy

JF - Annals of nuclear energy

SN - 0306-4549

ER -