upper operational limit for water heat pipes. In order to avoid
consequences of evaporator dry-out, the heat pipe has to be
developed with an aim to provide higher heat transfer coefficient at
evaporator (using mesh or wire wick) and charged with appropriate
liquid inventory to handle high operating temperatures. In
the present analysis, effect of the phase change (latent heat of
evaporation) of reactor water on final attained reactor temperature
and rate of reactor cooling by heat pipe system is not considered.
Phase change process will reduce the final attained reactor temperature
and rate of reactor cooling by heat pipe system. In that
case, heat pipe system capacity can be over design to keep the
cooling time within safety margin. As current investigation is
mainly intended to present the feasibility of heat pipe cooling
concept for nuclear reactor, the detailed analysis, with consideration
on the reactor water phase change, will be conducted in the
future work.