Original scientific paper

Study of the Allegro Core Performance

Ján Haščík ; Institute of Nuclear and Physical Engineering, Slovak University of Technology in Bratislava Ilkovičova 3, 812 19 Bratislava, Slovakia
Štefan Čerba ; Institute of Nuclear and Physical Engineering, Slovak University of Technology in Bratislava Ilkovičova 3, 812 19 Bratislava, Slovakia
Jakub Lűley ; Institute of Nuclear and Physical Engineering, Slovak University of Technology in Bratislava Ilkovičova 3, 812 19 Bratislava, Slovakia
Branislav Vrban ; Institute of Nuclear and Physical Engineering, Slovak University of Technology in Bratislava Ilkovičova 3, 812 19 Bratislava, Slovakia

Abstract

The presented paper is related to introduction of the design and neutronic characterization
of the start-up core developed for Gas cooled Fast Reactor (GFR) demonstrator. Slovak
University of Technology in Bratislava joined the project ALLEGRO in last decade within the
consortium of middle-European institutions. In the development plan of the GEN IV GFR the
ALLEGRO demonstrator is one of the most necessary steps. The ALLEGRO reactor is small
helium cooled 75 MWth thermal power unit. Its main objective is to demonstrate the key GFR
technologies and to perform tests of innovative materials. The reactor core is based on the
standard and MOX pin type fuel in the first phase of the project. The active core of a large GFR
2400 makes use of ceramic materials, but in the first ALLEGRO core MOX fuel will be used. It
will be mainly to demonstrate the viability of the technology and to acquire necessary
experimental data for further research. In the presented works are identified the main
discrepancies between ALLEGRO and GFR 2400 designs, the sensitivity analysis was
performed for both reactors. Neutronic characterization is aimed to determination of the standard
neutronic parameters using conventional computational systems. The results of sensitivity and
uncertainty calculations are presented in conjunction with similarity analysis.

Keywords

Neutronics; MOX type fuel; Code Validation; GFR demonstrator

Hrčak ID:

199632

URI

https://hrcak.srce.hr/199632

Publication date:

15.10.2017.

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