Radiation damage in the target area shielding of a facility for Selective Production of Exotic Species ( SPES Project )
The advancement of radioactive ion beam (RIB) science since its advent in the last few decades calls for the development of so-called next generation facilities, able to provide beam intensities several orders of magnitude higher than presently available. Two of them are planned by the European roadmap and are representative of the two main methods by means of which RIBs are produced nowadays: projectile fragmentation and isotope separation on-line (ISOL); the latter, based on the ISOL technique, is the EURISOL project: the plan encompasses the construction of three intermediate facilities, one of which is expected to be built at Legnaro (Padua) INFN Laboratories: the SPES Project (Selective Production of Exotic Species).
Gamma radiation damage of structural concrete immersed in water.
AbstractConcern for the integrity of the Materials Testing Reactor canal walls prompted the testing of structural concrete samples for damage due to intense and prolonged gamma radiation exposures. Testing of the samples by breaking them under compression following gamma exposures up to 2 × 1011 R i
Drying-induced stresses in porous bodies —an elastoviscoplastic model
Abstract The paper describes the application of the finite element method to the calculation of drying-induced stresses in capillary porous bodies, using an elastoviscoplastic stress-strain relationship. The method is illustrated by its application to the problem of drying of a clay brick. Stress distributions are shown at three distinct stages of the drying process, and at each stage the relaxation of the stresses due to plastic flow is indicated. Zones of potential failure are clearly seen, and hence geometry or rate of drying can be modified to avoid such failure.