Plutonium Decontamination Using CBI Decon Gel 1101 in Highly Contaminated and Unique Areas at LLNL

Sutton, M ; Fischer, R P ; Thoet, M M ; O'Neill, M ; Edgington, G

关键词: R FACILITIES;    CURING;    DECONTAMINATION;    EFFICIENCY;    GAMMA SPECTROSCOPY;    LAWRENCE LIVERMORE NATIONAL LABORATORY;    METERS;    MULTIPLICITY;    NEUTRONS;    PLUTONIUM;    RADIATIONS;    RADIOACTIVITY;    STEELS;   

DOI  :  10.2172/945677
RP-ID  :  LLNL-TR-404723
PID  :  OSTI ID: 945677
Others  :  TRN: US0901228

美国|英语

来源: SciTech Connect

【 摘 要 】

A highly contaminated glove-box at LLNL containing plutonium was decontaminated using a strippable decontamination gel. 6 x 12 inch quadrants were mapped out on each of the surfaces. The gel was applied to various surfaces inside the glove-box and was allowed to cure. The radioactivity in each quadrant was measured using a LLNL Blue Alpha meter with a 1.5 inch standoff distance. The results showed decontamination factors of 130 and 210 on cast steel and Lexan{reg_sign} surfaces respectively after several applications. The gel also absorbed more than 91% of the radiation emitted from the surfaces during gel curing. The removed strippable film was analyzed by neutron multiplicity counting and gamma spectroscopy, yielding relative mass information and radioisotopic composition respectively.