The maximum linear heat generation rate is 50.6 kW/m, the average discharged burnup is 38.1 GWd/tU, and the CVR is negative throughout the cycle.
In addition, it has been confirmed that the ARR core conforms to the set design requirements; the void reactivity, the maximum linear heat rate, and the shutdown margin of reactivity control system.
Results suggest that all the design target, criteria and limits are satisfied in terms of average coolant outlet temperature, maximum linear heat generation rate (MLHGR), maximum cladding surface temperature (MCST) as well as core shutdown margin, negative coolant void reactivity coefficient and positive coolant density reactivity coefficient in all coolant density range.
The numerical results show that all the design criteria are fulfilled by the maximum cladding surface temperature of 656 °C with 500 °C average core outlet temperature, maximum linear heat generation rate of 37.4 kW/m and positive water density as well as shutdown margin of 1.45%dk/k.
a LNISO Non-isothermal by Linear Heating b CONV.
Run-time parameters included a maximum migration rate of 10, a maximum divergence time of 10 Ne generations, and a burn in of 100,000 steps followed by a run of at least 10,000,000 steps with a linear heating scheme of increment 0.1.
Maximum linear distance of these homing forays was 600 m.
Multilocus analyses were run using 5 7 parallel chains under a linear heating scheme with a heating value of 0.05 – 0.055.
We ran the program under Metropolis Coupled MCMC, using ten chains with linear heating mode.
The analysis also indicates that designs featuring a relatively large number of fuel rods of relatively small diameters can achieve maximum burnup and provide maximum core power density because they allow the fuel rods to operate at moderate to low linear heat rates.
