MIS High-Purity Plutonium Oxide Metal Oxidation Product TS707001 (SSR123): Final Report

MIS High-Purity Plutonium Oxide Oxalate Precipitation/Calcination Product PBO-47-09-012-023 (Final Report)

“…The material of construction of the SSR is 304L stainless steel. The SSR consists of a container body 4 welded into a Conflat flange and a lid consisting of a Conflat flange with tubing attachments for connections to a pressure transducer and a gas manifold. An inner bucket is used to hold material and is inserted into the container body during the loading activities.…”

“…For this study, a Type H container with a total internal volume of 5.326 cm 3 was used. 4 The gas sampling volume located between two sampling valves, 0.05 cm 3 (~1 % of the SSR volume), allows gas composition to be determined with minimal effect on the internal gas pressure. A disassembled SSR is shown in Figure 4.…”

“…A gradual conversion of physisorbed water to chemisorbed water (hydroxyls) during the experiment would contribute to lower measured moisture content at the termination of the experiment but is expected to be approximately 1.5 monolayers (0.04 wt%) of water. 8,9 The major difference is probably due to water condensing in the colder region of the reactor plumbing. 9 During the gas generation study, the condensed moisture in the cold region of the plumbing is located at a sufficient distance from the material that the radiation dose it receives is orders of magnitude smaller than the radiation dose the water associated with the material receives.…”

“…8,9 The major difference is probably due to water condensing in the colder region of the reactor plumbing. 9 During the gas generation study, the condensed moisture in the cold region of the plumbing is located at a sufficient distance from the material that the radiation dose it receives is orders of magnitude smaller than the radiation dose the water associated with the material receives. This water is NOT expected to contribute to gas generation and would result in a low value for G(H2) in G-value calculations if it were included in the fraction being subjected to irradiation.…”