Proceedings of the 27th National and 5th International ISHMT-ASTFE Heat and Mass Transfer Conference December 14-17, 2023, IIT Patna, Patna-801106, Bihar, India
Analysis of Droplet Generation Process by Liquid Jet Impingement on Solid Surface Pertaining to Sodium Spray Fire Event in SFR
Resumo
In fast breeder nuclear reactors accidental breach in heat
transport circuits can cause sodium leaks and resultant fire
events may jeopardize the reactor safety. The liquid jet
released from the leak location can undergo fragmentation and
create numerous spray droplets and their burning in the
surrounding air constitutes the sodium spray fire scenario. In
this connection, numerical analysis has been carried out for
the assessment of spray formation and droplet generation
process by liquid jet impingement on an intercepting solid
surface. The analysis considered the flow structure of
impinging liquid jet over a horizontal surface and subsequent
fragmentation of liquid sheet formed. The resultant mean
droplet sizes have been evaluated using the linear stability
theory based analytical model. The representative mean
diameters predicted by the model for various leak conditions
have been compared with the benchmark liquid spray
experimental results available in the literature. The droplet
size distribution estimated by this method can be used in the
analysis of sodium spray fire scenarios pertaining to SFR
safety evaluation.