Transient behavior of ASTRID with a gas power conversion system - CEA - Commissariat à l’énergie atomique et aux énergies alternatives Accéder directement au contenu
Article Dans Une Revue Nuclear Engineering and Design Année : 2016

Transient behavior of ASTRID with a gas power conversion system

Résumé

The present article is dedicated to preliminary transient studies carried out for the analysis of the system overall behavior of the ASTRID (Advanced Sodium Technological Reactor for Industrial Demonstration) demonstrator developed in France by CEA and its industrial partners. ASTRID is foreseen to demonstrate the progress made in SFR technology at an industrial scale by qualifying innovative options, some of which still remain open in the areas requiring improvements, especially safety and operability. Among the innovative options, a gas power conversion systems (PCS) is envisaged. In this latter innovative PCS, the working gas is nitrogen whose flow rate delivers power to a turbine driving with the same shaft two compressors (low and high pressure) separated by an intercooler. The other part of the work delivered by the gas is used to drive the alternator that produces electricity. The main objective of such a PCS consists in avoiding physically the possibility of a sodium/water reaction with the secondary circuit but the impact of this PCS on the control of the accidents has also been studied. The main purpose of the studies presented in the paper is to assess the dynamic behavior of ASTRID including a gas PCS with the CATHARE2 code. The first transient presented deals with a loss of off-site power and has been calculated for the gas PCS but also for a classical steam/water PCS for comparison purpose. Then typical transients of gas system have been investigated. Several families of initiating events affecting the PCS are studied: breaches in the ternary circuit, a loss of power supply, a loss of main heat sink and the spurious 1 Corresponding author: frederic.bertrand@cea.fr opening of the turbine bypass valve. Regarding this last transient, sensitivity studies have shown that an adequate design of the turbomachine bypass lines allows a control of the event without shutdown. Moreover, regulating actions following the scram are also investigated in order to take benefit of the PCS in order to remove the decay heat.
Fichier principal
Vignette du fichier
201600001323.pdf (2.04 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

cea-02389201 , version 1 (02-12-2019)

Identifiants

Citer

F. Bertrand, G. Mauger, M. Bensalah, P. Gauthe. Transient behavior of ASTRID with a gas power conversion system. Nuclear Engineering and Design, 2016, 308, pp.20-29. ⟨10.1016/j.nucengdes.2016.08.005⟩. ⟨cea-02389201⟩

Collections

CEA DEN
33 Consultations
114 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More