American Nuclear Society
Home

Home / Store / Journals / Electronic Articles / Nuclear Science and Engineering / Volume 161 / Number 3 / Pages 357-362

Subcritical Measurements of a Plutonium Sphere Reflected by Polyethylene and Acrylic

Jesson Hutchinson, Timothy Valentine

Nuclear Science and Engineering / Volume 161 / Number 3 / Pages 357-362

March 2009

Format:

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

Subcritical measurements were conducted with an alpha-phase plutonium sphere using the 252Cf source-driven noise analysis method. Measurements were performed with both polyethylene and acrylic reflectors. For each reflector type, five different reflector thicknesses were investigated: 0 (bare), 1.27, 2.54, 3.81, and 7.62 cm. A certain ratio of spectral quantities that depends on the fluctuations in the fission chain multiplication process was measured for each configuration. In addition, two types of Monte Carlo calculations were employed to estimate the keff and spectral ratio values of each configuration. From the measured and computed quantities, the multiplication and uncertainty of the system can be inferred. The polyethylene measurements compared well to previous measurements conducted with the same plutonium sphere and polyethylene reflector thicknesses. The acrylic measurements provide benchmark data of an alpha-phase plutonium sphere reflected by acrylic.

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