Neutronic design and evaluation of the solid microencapsulated fuel in LWR

Neutronic design and evaluation of the solid microencapsulated fuel in LWR

Blog Article

Solid Microencapsulated Fuel (SMF) is a type of solid fuel rod design that disperses TRISO coated fuel particles directly into a kind of matrix.SMF is expected to provide improved performance because of the elimination of cladding tube and associated failure bondi 2 seater sofa mechanisms.This study focused on the neutronics and some of the fuel cycle characteristics of SMF by using OpenMC.Two kinds of SMFs have been designed and evaluated - fuel particles dispersed into a silicon carbide matrix and fuel particles dispersed into a zirconium matrix.A 7x7 fuel assembly with increased rod diameter transformed from the standard NHR200-II 9x9 array was also introduced to increase the heavy metal inventory.

A preliminary study of two kinds of burnable poisons (Erbia & Gadolinia) in two forms (BISO and QUADRISO particles) was also included.This study found that SMF requires about 12% enriched UN TRISO particles to match the cycle length of standard fuel when loaded in NHR200-II, which is about 7% for SMF with increased rod diameter.Feedback coefficients are less negative through the life of SMF than 3 nef runes the reference.And it is estimated that the average center temperature of fuel kernel at fuel rod centerline is about 60 K below that of reference in this paper.