Eventos Anais de eventos
ENCIT 2016
16th Brazilian Congress of Thermal Sciences and Engineering
Numerical study of the heating in a pneumatic irradiation system
Submission Author:
Marcelo Oguma , SP
Co-Authors:
Marcos Pimenta
Presenter: Marcelo Oguma
doi://10.26678/ABCM.ENCIT2016.CIT2016-0084
Abstract
Pneumatic irradiation system rigs are used in nuclear research reactors to provide a fast means of sending materials to irradiation positions located near the reactor core. Capsules containing the sample materials are sent through pipes using a gaseous fluid propellant. Upon reaching the desired position, the capsule undergoes exposure to radiation from the reactor enabling the transformation of the material allocated inside, but as a consequence of exposure, its thermal heating also occurs. This study has investigated this system numerically, using computational fluid dynamics (CFD). The results showed that for irradiation times on the order of 1 minute, considering a constant heat generation rate, can occur an increase in the capsule temperature up to critical values for the materials that are commonly used for their manufacture. Also, the numerical study was realized using four turbulence models and their results were compared to the experimental results.
Keywords
Pneumatic irradiation system, CFD, Heat transfer, Research Reactor, Pneumatic irradiation system, CFD, Heat transfer, Research Reactor, Pneumatic irradiation system, CFD, Heat transfer, Research Reactor, Pneumatic irradiation system, CFD, Heat transfer, Research Reactor, Pneumatic irradiation system, CFD, Heat transfer, Research Reactor
