'Prevent Problems Before they occur' a concept which is easy to understand but difficult to practicise when it applies particularly to nuclear reactors where managing severe accident is an uphill task. Understanding the mechanism of occurrence of split or rupture in clad is still a challenge. Simultaneous occurrence of split or rupture in number of channels easily leads to severe accident. The paper presents a method not to manage severe accidents but to prevent the same to occur in nuclear reactors based on deterministic approach. A computer program is developed with consideration of complex thermal hydraulics and severe accident phenomenon to ascertain the minimum flow rate of coolant above which there are practically no chance of any split or rupture to occur. The results of program are in close agreement with authors own experimental data and the data available by various other researchers and are discussed at length in the paper. An important objective is to pinpoint the location of the likely split or rupture in clad subsequent to LOCA. In-depth study of severe accident is made by considering the clad alone and filled with fuel separately.
Dr. Akanksha Saxena Pandit and Limaye, S. P., “Method to stop severe accident in nuclear reactors”, in Fourth national conference on nuclear reactor technology: emerging trends in nuclear safety, 2011.