Abstract
In the frame of LEADER project (Lead-cooled European Advanced Demonstration Reactor), a new configuration of the steam generator for ALFRED (Advanced Lead Fast Reactor European Demonstrator) was proposed. The new concept is a super-heated steam generator, double wall bayonet tube type with leakage monitoring [1]. In order to support the new steam generator concept, in the framework of Horizon 2020 SESAME project (thermal hydraulics Simulations and Experiments for the Safety Assessment of MEtal cooled reactors), the ENEA CIRCE pool facility will be refurbished to host the HERO (Heavy liquid mEtal pRessurized water cOoled tubes) test section to investigate a bundle of seven full scale bayonet tubes in ALFRED-like thermal hydraulics conditions. The aim of this work is to verify thermo-fluid dynamic performance of HERO during the transition from nominal to natural circulation condition. The simulations have been performed with RELAP5-3D© by using the validated geometrical model of the previous CIRCE-ICE test section [2], in which the preceding heat exchanger has been replaced by the new bayonet bundle model. Several calculations have been carried out to identify thermal hydraulics performance in different steady state conditions. The previous calculations represent the starting points of transient tests aimed at investigating the operation in natural circulation. The transient tests consist of the protected loss of primary pump, obtained by reducing feed-water mass flow to simulate the activation of DHR (Decay Heat Removal) system, and of the loss of DHR function in hot conditions, where feed-water mass flow rate is absent. According to simulations, in nominal conditions, HERO bayonet bundle offers excellent thermal hydraulic behavior and, moreover, it allows the operation in natural circulation.
Highlights
The Horizon 2020 SESAME project supports the development of the heavy liquid metal (HLM) system
In order to support the new steam generator concept, in the framework of Horizon 2020 SESAME project, the ENEA CIRCE pool facility will be refurbished to host the HERO (Heavy liquid mEtal pRessurized water cOoled tubes) test section to investigate a bundle of seven full scale bayonet tubes in ALFRED-like thermal hydraulics conditions
The analysis aims to investigate the transition from forced to natural circulation in a protected loss of flow accident scenario
Summary
Pre-test analysis of protected loss of primary pump transients in CIRCE-HERO facility. View the article online for updates and enhancements. - Analysis of a Station Black-Out transient in SMR by using the TRACE and RELAP5 code F De Rosa, C Lombardo, F Mascari et al. - Verification of RELAP5-3D code in natural circulation loop as function of the initial water inventory C Bertani, N Falcone, A Bersano et al. - Some Recent Applications of Thermodynamics in Steam Engineering Research R S Silver. 35th UIT Heat Transfer Conference (UIT2017) IOP Conf. V Narcisi 1, F Giannetti 1, A Del Nevo 2, M Tarantino 2 and G Caruso 1 1 DIAEE - Nuclear Section, “Sapienza” University of Rome, Corso Vittorio Emanuele II, 244, 00186, Roma, Italy 2 Italian National Agency for New Technologies, Energy and Sustainable Economic Development, C.R. ENEA Brasimone, Italy
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