SYMPOSIA PAPER Published: 01 January 2007

Analysis of the VENUS-3 PWR Pressure Vessel Surveillance Benchmark Using TRIPOLI-4.3 Monte Carlo Code


This paper presents the analysis of the VENUS-3 PWR Pressure Vessel Surveillance Dosimetry Benchmark using the three-dimensional (3D) continuous-energy Monte Carlo code TRIPOLI-4.3. VENUS-3 benchmark specifications are taken from the 2004 release of the International Database for Integral Shielding Experiments (SINBAD) of OECD/NEA. Pointwise nuclear data library for TRIPOLI-4.3 transport calculations were prepared from ENDF/B-VI.4. Detector cross sections for 27Al(n,α) 58Ni(n,p), and 115In(n,n') from IRDF-2002, IRDF-90.V2, and ENDF/B-VI.4 have been investigated. Two 235U fission spectra, continuous Watt spectrum and 581 group ENDF/B-VI.4 spectrum have been compared. To speed up the simulation and to predict the axial (50-cm) and azimuthal (0°–90°) variation of the reaction rates for core barrel measurement points, variance reduction techniques using cylindrical surface detector and cylindrical biasing meshes have been applied and demonstrated. C/E values at 160 different locations have been evaluated. Without taking into account the uncertainty of the nuclear data in transport calculation and the uncertainty of the 3D neutron source distribution, a 10 % C/E tolerance margin should be accepted.

Author Information

Lee, Y., K.
Commissariat à l'Energie Atomique, CEA/Saclay, DEN/DM2S/SERMA, Gif sur Yvette, France
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Developed by Committee: E10
Pages: 261–269
DOI: 10.1520/STP45452S
ISBN-EB: 978-0-8031-6242-6
ISBN-13: 978-0-8031-3412-6