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Evaluation of safety of French Type B package designs in severe accident environments other than regulatory


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Titre du congrès :PATRAM Ville du congrès :Miami Date du congrès :21/10/2007

Type de document > *Congrès/colloque

Mots clés > accident, chute, colis, combustible usé, crise, déchets vitrifiés, MOX, plutonium, sûreté, transport

Unité de recherche > IRSN/DSU

Auteurs > DOARE Olivier, LIZOT Marie-Thérèse, SERT Gilles

Date de publication > 26/10/2007

Résumé

Packages used to transport radioactive materials in France must be designed to meet the safety performance requirements when subject to the test conditions set forth in the International Atomic Energy Agency (IAEA) Regulations. During actual use, the packages may be subject to quite different accident conditions. The Institut de Radioprotection et de Sûreté Nucléaire (IRSN) has evaluated the behaviour of typical packages designed to transport spent fuel, high activity waste, fresh mixed oxide (MOX) fuel and plutonium oxide powder under realistic conditions of mechanical impact and fire. The studied designs remain safe after impact onto targets present in the real environment of transport. The energy absorption by the package ancillary equipment (transport frame) compensates for the kinetic energy increase by comparison to the energy expended during the regulatory tests. New software was developed to correctly simulate the thermal behaviour of the neutron shielding materials. The studied package designs exhibit large margins of safety concerning resistance to fire. The results obtained have been used to develop tools in support of the appraisal of emergency situations