The decision has been made to dispose of this sludge separate from more » the fuel elements stored in the basins. The K Basin sludge contains uranium oxides, fragments of metallic U, and some U hydride as well as ferric oxyhydroxide, aluminum oxides and hydroxides, windblown sand that infiltrated the basin enclosure, ion exchange resin, and miscellaneous materials. The conclusion of this study along with laboratory and hot cell tests with actual sludge samples will provide the basis for beginning conceptual design of the sludge dissolver. CHEM C has a similar hands-on approach to teaching chemistry as our other CHEM kits, but also teaches more advanced topics such as chemical che, atomic structures, and the periodic table.Request PDF The effect of scent-marking, forest clearing, and supplemental feeding on moose-train collisions We analyzed how the application of.The purpose of this engineering study is to investigate the available technology related to dissolution of the K Basin sludge in nitric acid. We don’t know when or if this item will be back in stock. Thames & Kosmos 640132 Chem C3000 Chemistry Experiment Kit.The sludge conditioning equipment will be designed to process all of the sludge streams, but some of the operating parameters will be adjusted as necessary to handle the different sludge stream compositions. The composition of the floor and pit sludges which contain more iron oxides and sand than uranium is much different than the canister sludges which are composed of mostly uranium oxides. There will be five distinct feed streams to the sludge conditioning process two from the K East (KE) Basin and three from the K West (KW) Basin. Sludge conditioning will be done by dissolving the fuel constituents in nitric acid, separating the insoluble material, adding neutron absorbers for criticality safety, and then reacting the solution with caustic to co-precipitate the uranium and plutonium.
Ash and sludge containing uranium compounds also have been dissolved in reprocessing or plutonium scrap recovery plants, but only a limited amount of information is available on how the ferric oxyhydroxide, aluminum compounds and silicates in the sand will behave during nitric acid dissolution. Both uranium metal and uranium dioxide have been dissolved on a large scale in nuclear fuel reprocessing plants in Europe, Japan, and the USA. Dissolution of uranium metal and uranium dioxide has been studied quite thoroughly and much information is available. The following design concept was selected based on the process requirements, functions, and assumptions developed. Included are a process description and potential risks and interfaces to be managed at KE to consolidate the sludge. This document identifies process requirements, assumptions, functions, and recommends architecture to complete KE sludge consolidation. Sludge consolidation is expected to require the addition of flocculants to aid in its settling and support hash water quality requirements. From the sludge and this larger material will be moved to the dummy elevator pit for the FTS to transfer to KW for disposition. A screen/strainer will be used to remove particles greater than 114 in. The sludge will be retrieved using a combination of portable Tri-Nuclear pump(s) and (once NLOP work is completed) the Sludge and Water System (SWS) equipment. Rigid and free-standing pit liners were selected so the liners do not interface with the pits walls and potentially compromise the safety function of the pit walls. A fourth location (the Weasel pit channel) was identified as contingency volume pending detail design of the liners. Tom anderson guitars serial numbers« lessSTEM and Robotics Supplemental Curriculum. Programmatic risks were identified for the sludge consolidation and the following near-term actions are recommended: Confirm that the design concept is consistent with the current Authorization Basis Confirm flocculant addition conditions and rates Define end points (or how clean is clean) and Develop an integrated schedule for KE Basin, including resources and floor space needs. Discharging to multiple liner locations will be used to reduce velocities and therefore improve settling. ![]() Chem C3000 Supplemental Series Of Engineering« lessThis plan outlines a Characterization Program that provides the necessary data to support the Integrated Process Strategy scope and schedules for the Spent Nuclear Fuel (SNF) and sludge stored in the Hanford K Basins. The process described is based on a series of engineering studies and laboratory tests outlined in the testing strategy document (Flament 1998). This document describes a process for dissolving the sludge to produce waste streams that meet the TWRS acceptance criteria for disposal to an underground waste tank and the ERDF acceptance criteria for disposal of solid waste. The undissolved solids will be treated to reduce the transuranic (TRU) and content, stabilized in grout, and transferred to the Environmental Restoration Disposal Facility (ERDF) for disposal. A truck will transport the resulting slurry to an underground storage tank (most likely tank 241-AW-105). Sampling of the basin floor and pit sludge will be conducted independent of the fuel and canister sludge shipping activities. Fuel examinations are based on two shipping compains from the K West Basin and one from the K East Basin with coincident sludge sampling campaings for the associated canister sludge. The intent of the program is to provide bounding behavior for the fuel, and acceptability for the transfer of the sludge to the Double Shell Tanks. In order to assure the scope and schedule of the Characterization Program fully supports the Integrated Process Strategy, more » key project management has approved the plan. The program is structured for 4 years (i.e., FY 1995 through FY 1998) and is limited to in-situ and laboratory examinations of the SNF and sludge in the K East and K West Basins. Sludge laboratory examinations include measurement of quantity and content, measurement of properties for equipment design and recovery precesses, tank farm acceptance, simulant development, measurement of corrosion products, and measurements of drying behavior. Sludge laboratory examinations include measurement of quantity and content, measurement of properties for equipment design and recovery process limits and support safety analysis. These laboratory examinations are expected to provide the necessary data to establish or confirm fuel conditioning process limits and support safety analysis.
0 Comments
Leave a Reply. |
AuthorSandra ArchivesCategories |