Special Section Papers

Safest Roadmap for Corium Experimental Research in Europe

[+] Author and Article Information
Christophe Journeau

Saint-Paul-lez-Durance 13108, France
e-mail: christophe.journeau@cea.fr

Viviane Bouyer, Nathalie Cassiaut-Louis, Pascal Fouquart, Pascal Piluso, Gérard Ducros

Saint-Paul-lez-Durance 13108, France

Stéphane Gossé, Christine Guéneau, Andrea Quaini

Gif-sur-Yvette 91191, France

Beatrix Fluhrer, Alexei Miassoedov, Juri Stuckert, Martin Steinbrück

Hermann-von-Helmholtz Pl. 1,
Eggenstein Leopoldshafen 76344, Germany

Sevostian Bechta, Pavel Kudinov, Weimin Ma, Bal Raj Sehgal

Nuclear Power Safety Department,
Stockholm 100 44, Sweden

Zoltan Hozer, Attila Guba

Budapest 1121, Hungary

Dario Manara, David Bottomley

Joint Research Centre (JRC),
Hermann-von-Helmholtz Pl. 1,
Karlsruhe 76125, Germany

Manfred Fischer, Gert Langrock, Holger Schmidt

Paul Gossen Strasse 100,
Postfach 1109,
Erlangen 91001, Germany

Monika Kiselova, Jiri Ždarek

UJV REZ a.s.,
Hlavni 130,
Husinec Rez 250 68, Czech Republic

1Corresponding author.

Manuscript received December 12, 2016; final manuscript received May 9, 2017; published online December 5, 2017. Assoc. Editor: Mohammad Pourgol-Mohammad.

ASME J. Risk Uncertainty Part B 4(3), 030901 (Dec 05, 2017) (10 pages) Paper No: RISK-16-1145; doi: 10.1115/1.4037878 History: Received December 12, 2016; Revised May 09, 2017

Severe accident facilities for European safety targets (SAFEST) is a European project networking the European experimental laboratories focused on the investigation of a nuclear power plant (NPP) severe accident (SA) with reactor core melting and formation of hazardous material system known as corium. The main objective of the project is to establish coordinated activities, enabling the development of a common vision and severe accident research roadmaps for the next years, and of the management structure to achieve these goals. In this frame, a European roadmap on severe accident experimental research has been developed to define research challenges to contribute to further reinforcement of Gen II and III NPP safety. The roadmap takes into account different SA phenomena and issues identified and prioritized in the analyses of severe accidents at commercial NPPs and in the results of the recent European stress tests carried out after the Fukushima accident. Nineteen relevant issues related to reactor core meltdown accidents have been selected during these efforts. These issues have been compared to a survey of the European SA research experimental facilities and corium analysis laboratories. Finally, the coherence between European infrastructures and R&D needs has been assessed and a table linking issues and infrastructures has been derived. The comparison shows certain important lacks in SA research infrastructures in Europe, especially in the domains of core late reflooding impact on source term, reactor pressure vessel failure and molten core release modes, spent fuel pool (SFP) accidents, as well as the need for a large-scale experimental facility operating with up to 500 kg of chemically prototypic corium melt.

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Grahic Jump Location
Fig. 1

Schematic drawing illustrating the formation of corium in the Three Mile Island 2 severe accident of 1979 [1]

Grahic Jump Location
Fig. 2

QUENCH Facility: containment and test section

Grahic Jump Location
Fig. 3

Example of QUENCH bundle cross section

Grahic Jump Location
Fig. 4

Left: 3D drawing of KROTOS facility: radiative furnace (1), rapid-acting ball valve (2), release tube (3), puncher and release cone (4), test section (5). Right: X-ray radioscopy system




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