Search

The research on the design of a pressurized water reactor with a power of 300 MWth and using uranium carbide (UC) fuel has been carried out. Neutronic analysis was carried out using the System Reactor Atomic Code (SRAC) program, which was operated on a set of computers with Linux Operating System (OS), SRAC codes, namely PIU and COREBN. PIU is used to calculate the fuel cell level, and COREBN is used to calculate the reactor core level. The reactor is designed to produce critical conditions. The parameters analyzed in this study were fuel enrichment (U-235), reactor core size, multiplication factor, reactor core configuration, and criticality. This study calculates the neutronic calculation of UC fuel with the addition of Neptunium 237 (Np-237), which aims to reduce the value of the effective multiplication factor (k-eff). Neutronic analysis of UC fuel with critical conditions at Fl = 4.5%, F2 = 5%, F3 = 5.5%, fuel fraction = 55% with the addition of neptunium 237 0.5%. [ABSTRACT FROM AUTHOR]

High pressure structural and elastic properties of neptunium arsenide (NpAs) have been studied using three body interaction potential (TBIP). The three body interaction arises from the electron-shell deformation when the nearest –neighbor ions overlap. The equation of state of NpAs has been calculated and compared with high pressure X-ray diffraction data. The theoretically predicted phase transition pressure and other structural properties agree reasonably well with the measured values. The second and third order elastic constants, second order pressure derivatives and variation of second order elastic constants (SOEC) with pressure is also presented. [ABSTRACT FROM AUTHOR]