ISSN Online: 2379-1748
ISBN Flash Drive: 978-1-56700-472-4
ISBN Online: 978-1-56700-471-7
3rd Thermal and Fluids Engineering Conference (TFEC)
EFFECT OF MASS FLOW RATE ON DESIGN OF PRIMARY HEAT EXCHANGER
Resumo
Research reactors for the multi-purpose neutron application have the cooling system for the cooling of the reactor
core power. The research reactor modeled in this paper also incorporates the Primary Cooling System (PCS),
Secondary Cooling System (SCS), and primary heat exchanger between two systems as shown in Fig. 1. The PCS
removes the fission heat generated in reactor core by circulating the demineralized water through the system. The
heat from the PCS is rejected to the cold water of the SCS through the primary heat exchanger. The plate-type
Heat Exchanger (PHE) was used as the primary heat exchanger. The cooling tower automatically maintains the
SCS inlet temperature constant by controlling the fan speed. The flow rate of SCS is adjusted to be identical with
that of the PCS. To design the PHE, the inlet and outlet temperatures and the flow rates for both systems should
be determined. The flow rate has the allowable band for the safe operation from the lower limit to upper limit
resulting in different temperature distribution in the PHE. Specially, the PCS outlet temperature which is the core
inlet temperature is used for a safety parameter for the reactor shutdown. Therefore, we need to figure out which
limit for the flow rate should be used from the conservative point of view. In this paper, the effect of the mass flow
rate of the PCS on the PCS outlet temperature was analytically studied in conditions of the constant core power
and constant SCS inlet temperature.