Thermal-hydraulic behavior of physical quantities at critical velocities in a nuclear research reactor core channel using plate type fuel

Ali Sidi, Zaki Boudali, Rachid Salhi
2012 Nuclear Technology and Radiation Protection  
The ther mal-hy drau lic study pre sented here re lates to a chan nel of a nu clear re ac tor core. This chan nel is de fined as be ing the space be tween two fuel plates where a cool ant fluid flows. The flow ve loc ity of this cool ant should not gen er ate vi bra tions in fuel plates. The aim of this study is to know the dis tri bu tion of the tem per a ture in the fuel plates, in the clad ding and in the cool ant fluid at the crit i cal ve loc i ties of Miller, of Wambsganss, and of Cekirge
more » ... and Ural. The ve loc ity ex pres sions given by these au thors are func tion of the ge om e try of the fuel plate, the me chan i cal char ac ter is tics of the fuel plate's ma te rial and the ther mal char ac ter is tics of the cool ant fluid. The ther mal-hy drau lic study is made un der steady-state; the equa tion set-up of the ther mal prob lem is made ac cord ing to El Wakil and to Delhaye. Once the equa tion set-up is val i dated, the three crit i cal ve loc i ties are cal cu lated and then used in the cal cu la tions of the dif fer ent tem per a ture pro files. The av er age heat flux and the crit i cal heat flux are eval u ated for each crit i cal ve loc ity and their ra tio re ported. The rec om mended crit i cal ve loc ity to be used in nu clear chan nel cal cu la tions is that of Wambsganss. The math e mat i cal model used is more pre cise and all the phys i cal quan ti ties, when us ing this crit i cal ve loc ity, stay in safe margins. Key words: nu clear re ac tor, re ac tor core, re ac tor chan nel, fuel plate, crit i cal ve loc ity, heat flux K. Sidi Ali, et al.: Ther mal-hy drau lic Be hav ior of Phys i cal Quan ti ties at Crit i cal ., et al.: Ther mal-hy drau lic Be hav ior of Phys i cal Quan ti ties at Crit i cal .
doi:10.2298/ntrp1203229s fatcat:m7rpau5tvvdd3ngbx7skyruure