Burnup span sensitivity analysis of different burnup coupling schemes

► The objective of this work is the burnup span sensitivity analysis of different coupling schemes. ► Three kinds of schemes have been implemented in a new MCNP-ORIGEN linkage program. ► Two kinds of schemes are based predictor-corrector technique and the third is based on Euler explicit method. ► The analysis showed that the predictor-corrector approach better accounts for nonlinear behavior of burnup. ► It is sufficiently good to use the Euler method at small spans but for large spans use of second order scheme is mandatory.