Practice for Sampling of Gaseous Uranium Hexafluoride

2008 ◽  
Author(s):  
Keyword(s):  
Uranium Hexafluoride ◽  
Gaseous Uranium

Remote leak monitoring of gaseous uranium hexafluoride by UVDIAL

2009 ◽  
Author(s):  
Gholamreza Shayeganrad ◽  
Leila Mashhadi
Keyword(s):  
Uranium Hexafluoride ◽  
Gaseous Uranium

Environmental Cracking of High Strength Maraging Steels: Part 2—Gaseous Fluoride Atmospheres

CORROSION ◽  
1981 ◽  
Vol 37 (2) ◽  
pp. 63-70
Author(s):  
D. H. Bradhurst ◽  
P. M. Heuer
Keyword(s):  
Hydrogen Fluoride ◽  
High Stress ◽  
High Strength ◽  
Uranium Hexafluoride ◽  
Tensile Tests ◽  
Maraging Steels ◽  
Partial Pressures ◽  
Mechanism Of Failure ◽  
Hydrogen Oxide ◽  
Gaseous Uranium

Abstract An investigation was made of the susceptibility to cracking of two commercial 350 grades of maraging steel. Tensile tests were carried out on samples of the steels at very slow strain rates, and the load at failure was used to assess the susceptibility of the steels to cracking in an environment of gaseous uranium hexafluoride and hydrogen fluoride at 70 C. Good resistance to cracking was observed in dry uranium hexafluoride gas but cracking occurred when hydrogen fluoride was present at partial pressures above about 1 kPa. The failure stress decreased with increasing pressure of hydrogen fluoride. Scanning electron microscopy revealed brittle fracture surfaces in all cases where failure occurred at low stress, while failures at high stress were usually ductile in appearance. In view of the susceptibility of these steels to hydrogen embrittlement, it is suggested that the mechanism of failure in the presence of HF was associated with reaction-produced hydrogen. Oxide coated samples prepared by air aging, did not have significantly better resistance to cracking than vacuum aged Samples in the UF6/HF environment.

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