American Nuclear Society
Home

Home / Store / Journals / Electronic Articles / Nuclear Technology / Volume 46 / Number 1 / Pages 127-133

Radiation-Induced Outgassing from Type 304 Stainless Steel

T. P. Toepker, J. N. Anno

Nuclear Technology / Volume 46 / Number 1 / Pages 127-133

November 1979

Format:

Price:$30.00
Member Price:$27.00
Member Savings:$3.00

A Type 304 stainless-steel vacuum system has been designed and constructed to study radiation-induced outgassing when this material is exposed to 60Co gamma radiation. An analytical model has been developed that predicts the outgassing from Type 304 stainless steel to be 5 X 10-10 Paℓ/cm2 . s per Mrad/h. Experiments determined the value for Type 304 stainless steel after bakeout at 300°C to be (1.03 ± 0.58) X 10-9 Pa ℓ/cm2 s per Mrad/h, in fair agreement with the analytical model predictions. Studies on thermally induced outgassing from Type 304 stainless steel showed that after bakeout at temperature T*, thermal outgassing ∆ obeys the relationship ∆ = ∆0 exp(∼Q/RT), where both the constant ∆0 and the average desorption energy Q are functions of T*. Water vapor and hydrogen were the principal residual gases in a Type 304 stainless-steel vacuum system, with hydrogen being dominant at low pressures after bakeout.

 
 
 
Questions or comments about the site? Contact the ANS Webmaster.
advertisement