Calculation of adjoint-weighted kinetic parameters with the reactor Monte Carlo code RMC

• Published in: Progress in nuclear energy (New series) Vol. 101; pp. 424 - 434
• Main Authors: Qiu, Yishu, Wang, Zijie, Li, Kaiwen, Yuan, Yuan, Wang, Kan, Fratoni, Massimiliano
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.11.2017
• Subjects: Adjoint; Iterated fission probability; Kinetic parameters; RMC; Superhistory method; RMC; Kinetic parameters; Adjoint; Iterated fission probability; Superhistory method
• ISSN: 0149-1970
• DOI: 10.1016/j.pnucene.2017.03.023

In this work, the capability of computing adjoint-weighted kinetic parameters, including effective delayed neutron fraction and neutron generation time, was implemented in the Reactor Monte Carlo (RMC) code based on the iterated fission probability (IFP) method. Three algorithms, namely, the Non-Overlapping Blocks (NOB) algorithm, the Multiple Overlapping Blocks (MOB) algorithm and the superhistory algorithm, were implemented in RMC to investigate their accuracy, computational efficiency and estimation of variance. The algorithms and capability of computing kinetic parameters in RMC were verified and validated by comparison with MCNP6 as well as experimental results through a set of multi-group problems and continuous-energy problems. •A capability of computing adjoint-weighted kinetic parameters is developed in the Reactor Monte Carlo code RMC.•Three algorithms of adjoint-weighted kinetic parameters based on the IFP method have been investigated.•The adjoint-weighted kinetic parameters computed by these algorithms in RMC agree well with MCNP6 and experimental results.