Severe accident management

Complex thermal-hydraulic and severe accident phenomenon is selected during Severe Accident Management. Deterministic approach is considered while assessing the consequences by severe accident due to Loss of Coolant Accident (LOCA) in vertical nuclear fuel channel. Mitigatory or Severe Accident Management has been used to arrest the temperature of clad such that it remains fairly below its softening limit. Method for establishment of minimum coolant flow through a nuclear fuel channel subsequent to LOCA is discussed in the paper. Concept of rewetting provides dependable foundation to Accident Management and is convenient in achieving the transient thermal analysis of clad. The results of analysis were found in close agreement with authors own experimental data and the data available by various other researchers. One of the important objectives of Accident Management is to control the generation of even a small size opening in clad subsequent to LOCA. In-depth study of severe accident is made by considering the clad filled with fuel and clad alone separately. In addition the paper brings out the accident management aspects with selected literature survey on Severe Accident Management.