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pubblicazioni - Memoria

The experiment COLIMA on aerosol retention in containment leak paths under severe nuclear accidents

pubblicazioni - Memoria

The experiment COLIMA on aerosol retention in containment leak paths under severe nuclear accidents

CEA and RSE managed an experiment concerning the investigation of aerosol retention within containment cracks under severe accident conditions. The main experiment was carried out in November 2008 with aerosol generated from the facility COLIMA and a sample of cracked concrete with defined geometric characteristics manufactured by RSE. The facility provided representative conditions of the aerosols suspended inside the containment of PWRs under a severe accident. Prototypical aerosol particles were generated with a thermitic reaction and transported through the crack sample, where surface characteristics, temperature, pressure drop and gas leakage were properly reproduced. The paper describes the approach adopted for the preparation of the cracked concrete sample and the dimensioning of the experimental apparatus, the test procedure and the measured parameters. The obtained results are also discussed in the light of the present knowledge about aerosol phenomena and the theoretical analyses of particle behaviour with the crack path.

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