Comparison of degradation effects induced by gamma radiation and electron beam radiation in two cable jacketing materials |
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| Institution: | 1. Composite Materials Group (CoMP)-Research Institute of Material Science and Technology (INTEMA)-National University of Mar del Plata (UNMdP), Solís 7575, 7600 Mar del Plata, Argentina;2. Research Institute of Material Science and Technology (INTEMA)-National University of Mar del Plata (UNMdP), Av. Juan B. Justo 4302, 7600 Mar del Plata, Argentina;1. INCDIE, ICPE CA, 313 Splaiul Unirii, Bucharest 030138, Romania;2. Valachia University, Faculty of Sciences, 18-24 Unirii St., Targoviste 130082, Romania;1. Max Planck Institute for Solar System Research, Justus-von-Liebig-Weg 3, 37077 Göttingen, Germany;2. Planetary Science Institute, Tuscon, AZ 85719, USA;1. Department of Physics and Astronomy, University of Nebraska—Lincoln, Lincoln, NE 68588-0299, USA;2. CEA, DAM, DIF, Arpajon F-91297, France |
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| Abstract: | The radiation degradation behavior of commercial low density polyethylene (LDPE) and ethylene–vinylacetate (EVA) cable materials has been investigated. The changes of mechanical properties, thermooxidative stability and density exhibit different radiation stability towards 60Co-gamma radiation and 160 keV electron beam radiation. This difference reflects much higher penetration of the gamma radiation through the polymeric material as a function of sample thickness. These results are discussed with respect to the role of beta radiation during design basis events in a nuclear power plants. In case when total accidental design basis event (DBE) dose (involving about 80% soft beta radiation) is simulated by 60Co-gamma radiation the conservatism is reached. |
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