SYMPOSIA PAPER Published: 01 January 1994

Analysis of the Venus Out-Of-Core Activation Measurements Using MCBEND


The VENUS-1 critical assembly simulates a U02-loaded core and the internal structures from the core baffle to the neutron pad, in a generic 3-loop plant. VENUS-2 contained mixed oxide PuO2 — UO2 fuel pins in the eight outer rows. Several out-of-core threshold activation rates (In-115, Np-237, Zn-64, Al-27, Ni-58, U-238, Rh-103) have been measured at numerous locations in water zones and steel structures. From these measurements, “equivalent fission fluxes” have been established by dividing the activation rates by cross-sections weighted by the U-235 fission spectrum. Calculations of equivalent fission fluxes have been carried out with the Monte Carlo transport programme MCBEND. The average ratio calculation/experiment (C/E) in the core barrel, with 80 dosimeters and 7 types of reactions, is 1.02 ± 0.03 (δ). Further away from the core, the average C/E in the neutron pad from 13 measurements is 1.01 ± 0.08 (δ).

Author Information

Blaise, PD
, Brussels, Belgium
de Wouters, RM
Tractebel Energy Engineering, Brussels, Belgium
Abderrahim, HA
fuel research division, SCK-CEN, Mol, Belgium
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Developed by Committee: E10
Pages: 323–332
DOI: 10.1520/STP15125S
ISBN-EB: 978-0-8031-5281-6
ISBN-13: 978-0-8031-1899-7