2018 | AFC ACCOMPLISHMENTS 78 capability in BISON is utilized, and, as such, this analysis considers azimuthally uniform heat transfer conditions. Before the onset of the transient conditions, the fuel rod is operated under steady-state conditions.When the fuel reaches a specified fuel burnup, the accident conditions are initiated.These conditions are modified from a previous study which used theTRACE thermal-hydraulics analysis tool, and are designed to simulate a reactor scram and subsequent loss of coolant inventory and flow.The cladding and fuel temperatures begin to increase as the decay heat from the fuel can no longer be removed from the reactor vessel. Figure 1 shows the maximum cladding temperature during the transient. In this figure, the reactor is scrammed at 0s, and the reactor power then decays according to the fission product decay heat relation. The coolant flow slowly decreases as Figure 2. The maximum cladding hoop stress is reduced as the accident begins, however, the hoop stress in the FeCrAl cladding monotonically increases as the accident progresses.