Development of Scaling Requirements for Natural Convection Liquid-Metal Fast Breeder Reactor Shutdown Heat Removal Test Facilities

Scalability of the natural convection shutdown heat removal test facility (NSTF) data to VHTR/NGNP RCCS designs.

“…The approach is based on the premise that if two dissimilar systems satisfy the same set of equations, either system can be used to model the other. [5] The scale model is referred to as the experiment; the physical system is the plant. Generally, the task is to determine the values of physical parameters in the experiment that permit it to be a surrogate for predicting plant behavior.…”

“…[5] We cast both plant and experiment as the same set of equations by nondimensionalizing both plant and experiment equations. Define the dimensionless ratios …”

Two-phase natural circulation loop behaviour at atmospheric and subatmospheric conditions

“…Coupled with reliability and safety, NCLs are opted as a lucrative choice for large- and small-scale applications like nuclear reactor cooling, gas turbine blade cooling, solar systems, refrigeration systems, electronic chipset cooling, etc. 1–5…”

“…Coupled with reliability and safety, NCLs are opted as a lucrative choice for large-and small-scale applications like nuclear reactor cooling, gas turbine blade cooling, solar systems, refrigeration systems, electronic chipset cooling, etc. [1][2][3][4][5] Net driving force of the loop fluid is relatively low in single-phase NCL due to lower buoyancy forces. The driving force can be increased by creating two phases in riser and single phase (liquid) in downcomer section.…”

Scaling of natural circulation loop operation modes

“…A number of research were made on the scaling criteria for NCLs Since Zuber [2], Heisler [3] and Ishii-Kataoka [4]. Based on the research of Ishii and Kataoka, Reyes Jr. and Jose N. obtained the scaling criteria of NCLs steady-state when the evaporator inlet was saturated.…”