12-23 October 2020
GMT timezone

Development of a real-time simulation RELAP/SUNDIALS code for the Dalat Nuclear Research Reactor

13 Oct 2020, 16:12
Mini Oral and Poster Real Time Simulation Poster session B-01


Mr TRUONG, Tuan (Center for Nuclear Technologies)


The Reactor Excursion and Leak Analysis Program (RELAP5) is a light water reactor transient analysis code for simulation of hydraulic and thermal transients in both nuclear and nonnuclear systems for which a new RELAP5-based real time simulation code has been developed at the Center for Nuclear Technologies (CNT) for the Dalat Nuclear Research Reactor (DNRR) in Vietnam. However, a probable bug in the RELAP5 reactor kinetics (rkin) module causes nonphysical reactor power curve when small calculations time steps are applied. This paper proposes a new code so-called RELAP/SUNDIALS, by coupling the software package SUNDIALS (SUite of Nonlinear and DIfferential/ALgebraic Equation Solvers) and RELAP5 together to replace the implementation of the original Runge-Kutta method to which is of implicit and explicit iterative numerical analysis. Both RELAP5 and RELAP/SUNDIALS were compared against benchmark cases and the latter proved to be superior in terms of calculation accuracy.

IEEE Member No
Minioral Yes
Are you a student? No

Primary authors

Mr TRUONG, Tuan (Center for Nuclear Technologies) Mr CAO, Long (Center for Nuclear Technologies) Mr HUYNH, Phuong (Center for Nuclear Technologies) Dr HO, Dung (Center for Nuclear Technologies)

Presentation materials