.jpg)
Journal Search Engine
ISSN : 1738-1894(Print)
ISSN : 2288-5471(Online)
ISSN : 2288-5471(Online)
UO2 펠릿 산화로의 분말 비산 방지를 위한 최종속도 측정
Measurement of Terminal Velocity for Scatter Prevention of Powder in the Voloxidizer for Oxidation of UO2 Pellet
Abstract
A voloxidizer for a hot cell demonstration, that handles spent fuels of a high radiation level in a limited space should be small and spent fuel powders should not be dispersed out of the equipment involved. In this study a density rate equation as well as the Stokes'equation has been proposed in order to obtain the theoretical terminal velocity of powders. The terminal velocity of UO has been predicted by using the terminal velocity of SiO, and then determination has been the optimum air flow rate which is able to prevent powders from scattering. An equation which has shown a relationship between theoretical terminal velocities of UO and SiO has been derived with the help of the Stokes'equation, and then an experimental verification made for the theoretical Stokes' equation of SiO by means of an experimental device made of acryl. The theoretical terminal velocity based on the proposed density rate equation has been verified by detecting UO powders in a filter installed in the mock-up voloxidizer. As the results, the optimum air flow rates seem to be 20 LPM by the Stokes'equation while they are 14.5 L/min by the density rate equation. At the experiments with the mock-up voloxidizer, a trace amount of UO seems to be detectable at the air flow rate of 14.5 L/min by the density rate equation, but UO powders of 7m diameter seem detectable at the air flow rate of 20 L/min by the Stokes'equation. It is revealed that 14.5 L/min is the optimum air flowe rate which is capable of preventing UO powders from scattering in the UO voloxidizer and the proposed density rate equation is proper to calculate the terminal velocity of UO powders.
Reference
JNFCWT
Online Submission
Korean Radioactive
Waste Society (KRS)
Editorial Office
Contact Information
- Tel: +82-42-861-5851, 866-4157
- Fax: +82-42-861-5852
- E-mail: krs@krs.or.kr
