Nuclear fission produces heat at a uniform rate of $1450$ W$/$kg in a $15$ cm diameter cylindrical solid pellet with a nuclear fuel density of $8000$ kg$/$m$3$ and a conductivity of $325$ W$/($m K$).$ Convection transfers the heat from the fuel pellet to the coolant around it$,$ keeping the temperature of the pellet wall constant at $300$ degC. The maximum temperature $($in degC$)$ in the pellet at steady state, ignoring axial and azimuthal dependence, is $($round to nearest integer$)$