Objective
The project consists of a large scale model relative to a double concrete wall containment. The main objectives of the CESA mock-up are:
1.To study of the behaviour of the internal wall of the containment be its design limits while providing representation of the mechanical and thermal effects.
2.To evaluate the margins in the leak rates coefficients between air ( and air/steam mix (accident) through concrete cracks and porosity. 3.To study the behaviour of a local penetration.
4.To study the behaviour of a composite liner.
Up to now, the mechanical and thermal behaviour of a prestressed concrete wall was described by finite elements computations for design and beyond design situations. The air or air & steam leak rates across concrete cracks and porosity have been only given by theoretical calculations extrapolated from small laboratory tests.
The main difficulty is of course to represent with a sufficient accuracy the crack pattern and the crack widths. The scale of the mock-up (1/3 for the general dimensions (16 m diameter and 5 m high) and 1 for the concrete thickness) is large enough to represent correctly all the phenomena which can happen in a prestressed concrete wall when the concrete is no more in compression.
The project is divided in 4 stages:
1.Preliminarv studies: Experimental and theoretical studies on air an air & steam leak rates and aerosol retention and deposition in concrete cracks and porosity.
2.Benchmark exercise: Seven organisms have been selected to make predictive calculations on the mechanical, thermal and leak rate behaviour of the mock-up.
3.Test of the model: Mechanical and leak rate behaviour in normal LOC severe accident, leak rate with aerosol, test of a composite liner and pressure limit with water loading.
4.Analysis of the results: Complete analysis of the results obtained stage 3 and comparison with the stage 2 predictions.
The project will improve the European knowledge about the gas leak flows across a concrete wall during a very severe accident. The results obtained will be used by all the countries which are represented in EUR (European Utilities Requirements) and thus will permit to improve the European competitiveness. Finally, the analysis of the results will permit to improve the design of the future containments in terms of modelling and calculations and as a consequence in term of safety. This programmeshould have a positive effect in lots of other domains in terms of improvements of calculations.
Fields of science (EuroSciVoc)
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Programme(s)
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Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Topic(s)
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Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Call for proposal
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Funding Scheme
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Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Coordinator
69628 VILLEURBANNE
France
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.