Emplacement optimization for the first-stage disposal facility of LILW complex disposal facility by employing simulated annealing algorithm

Abstract

In order to optimize the emplacement of LILW (Low- and Intermediate-Level radioactive Waste) complex disposal facility, an emplacement optimization program POWER (Program for Optimization of Waste package Emplacement in Repository) based on Simulated Annealing (SA) algorithm is developed. The POWER program derives near-optimum emplacement schemes that minimize the objective function consisting of total dose, radiotoxicity flux, and radiotoxicity concentration obtained from GoldSim calculations for the post-closure safety assessment for LILW rock cavern disposal facility. An optimization problem of sixty nine drums with different degradation mechanism, source term, and drum type to be disposed of into the first-stage disposal facility is defined first and a series of optimization calculations is performed. It is verified that the POWER can generate the near-global optimized emplacement scheme from SA process.