The importance of oxygen in LOCA simulation tests
| Autor: | R.L. Clough, J. Chenion, K.T. Gillen, G. Ganouna-Cohen, G. Delmas |
|---|---|
| Rok vydání: | 1983 |
| Předmět: |
Nuclear and High Energy Physics
Materials science Mechanical Engineering chemistry.chemical_element Oxygen Accelerated aging Overpressure Nuclear Energy and Engineering chemistry medicine Forensic engineering Degradation (geology) General Materials Science Limiting oxygen concentration Swelling medicine.symptom Solubility Oxygen gas Composite material Safety Risk Reliability and Quality Waste Management and Disposal |
| Zdroj: | Nuclear Engineering and Design. 74:271-285 |
| ISSN: | 0029-5493 |
| Popis: | Experiments were performed to survey the effects on material degradation of both aging conditions and the oxygen concentration during a Loss-of-Coolant Accident (LOCA)-simulation. Changes for a number of commercial materials commonly used as electric cable jackets and insulations in nuclear power plant applications were monitored in terms of weight, mechanical properties, solubility measurements and infrared spectroscopy. For a number of these materials (an EPR insulation, a chloroprene jacket and a PVC jacket), the concentration of oxygen during LOCA simulation was found to be an important parameter. For the first two materials, more degradation occurred when oxygen was present; for PVC, substantially increased swelling occurred as the oxygen concentration was lowered. These results indicate that a realistic LOCA-simulation test should include an overpressure of oxygen gas representative of the postulated oxygen concentration expected during a predicted LOCA. Conditions of accelerated aging exposure prior to the LOCA simulation were also found to have a very substantial influence. In particular, for a number of the materials, lowering the radiation dose rate used for aging led to enhanced degradation after both the aging and the LOCA simulation. |
| Databáze: | OpenAIRE |
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