Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

A Fast and Self-Consistent Approach for Multi-Cycle Equilibrium Core Studies using Monte Carlo Models



Zeyun NMN Wu, Robert E. Williams


A fast and self-consistent approach, PRELIM approach, is described in this paper with the aim of quickly delivering a multi-cycle equilibrium configuration using Monte Carlo models. This approach is based on simple reactor physics, and is easily incorporated into standard Monte Carlo core design tools. The primary purpose of this study is to provide an efficient approach to enable routine calculations for feasibility studies of nuclear reactor design concepts based on Monte Carlo methods. The approach is capable of realistic conceptual core design calculations in a repeated manner with sufficient accuracy of key performance parameters. The validity of the PRELIM approach is demonstrated by benchmarking its results to solutions provided by a higher order approach with detailed core calculations in a given example problem.
Proceedings Title
ANS MC2015 Proceedings
Conference Dates
April 19-23, 2015
Conference Location
Nashville, TN, US
Conference Title
Joint International Conference Mathematics and Computation (M&C), Supercomputing in Nuclear Applications (SNA) and the Monte Carlo (MC) Method


Multi-cycle Equilibrium Core, Reactor Physics, Monte Carlo Model


Wu, Z. and Williams, R. (2015), A Fast and Self-Consistent Approach for Multi-Cycle Equilibrium Core Studies using Monte Carlo Models, ANS MC2015 Proceedings, Nashville, TN, US, [online], (Accessed June 13, 2024)


If you have any questions about this publication or are having problems accessing it, please contact

Created April 18, 2015, Updated October 12, 2021