Analysis of the Pulsed Fast Reactor “Neptun” Dynamics

Publications, 29 October 2020

We are glad to bring to your attention a new preprint «Analysis of the Pulsed Fast Reactor “Neptun” Dynamics: Comparison of Calculation Models» P3-2020-13 published by the JINR Publishing Department. The authors are Shabalin E. P., Rzyanin M. V.


Generation of a power pulse in periodically pulsed reactor is considered with account for fast reactivity feedback. The calculation method includes coupled neutronic-thermoelastic equations based on one-point kinetics of the reactor and on two models of elastic behaviour of reactor fuel rods: approximation of a reactor core as a one-dimensional oscillator and, more realistically, accounting for elastic waves propagation through a single rod. It is shown that reasonably chosen parameters of the oscillator model give results close to that of the wave model.

The investigation has been performed at the Frank Laboratory of Neutron Physics.