Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

  • Congratulations cowski on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

yellow cake dust- settling velocity

Status
Not open for further replies.

nicolai

Mechanical
Joined
Sep 27, 2000
Messages
42
Location
NA
hi Folks
do anyone has any reference regarding the settling velocity of yellow cake (uranium oxide) dust.

Need it to ensure min velocity is adhered to prevent settling in duct system


thanks
 
usually the first approximation is using the Stokes flow formula, but it is also important to know the size distribution. The size used may be that for which 96% of the particles are smaller, based on experieince with pulverized coal dust transport. A lower velocity will cause the flow to behave as 2-phase flow, with corresponding layout and flow peculiarities at bends.
I seem to recall that there were issues back in the 1960's when there was "missing" radioactive dust at the nuclear reprocessing plants in the USA, later found out to be layout in the transport ducts and also in the ventilaton system ducts. You would do well to contact the agencies and companies that have experience in this particular field. An old reference book on this sort of topic was " Fluidization and fluid-particle systems " by Frederick Zenz

"...when logic, and proportion, have fallen, sloppy dead..." Grace Slick
 
Status
Not open for further replies.

Similar threads

Part and Inventory Search

Sponsor

Back
Top