![]() ![]() A new technique is developed with fixing factor to find out the average temperature at the peak power node (PPN) without performing temperature calculations at all axial nodes in a reactor fuel pin. A Fortran program is developed for accident analysis of LMFBRs with the PWS method for solving the point kinetics and a lumped model for solving the heat transfer equations. In this study the power series solution (PWS) method is applied for solving the point kinetics equations for a typical LMFBR. Since the neutron lifetime in a LMFBR is very short, the point kinetics equations for LMFBRs become even stiffer. Point kinetics equations are stiff differential equations, and their solution by the conventional explicit methods will give a stable consistent result only for very small time steps.
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