The Analytic Function Expansion Nodal (AFEN) Method in Cylindrical (r,θ,z) Geometry for Pebble Bed Reactors

摘要

There is growing interest in developing pebble bedrnreactors (PBRs) as a candidate of very highrntemperature gas-cooled reactors (VHTRs). A typicalrnpebble bed reactor core houses a multitude of graphiternballs which are cycled continuously through the core.rnUntil now, most existing methods of nuclear designrnanalysis for this type of reactors are based on old finitedifferencernsolvers or on statistical methods.rnThere is strong desire of making available high fidelityrnnodal codes in cylindrical (r,