Results 1 - 10 of 1088
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[en] This document identifies 241-SX Tank Farm (SX Farm) leak causes and locations for the 100 series leaking tanks (241-SX-107, 241-SX-108, 241-SX-109, 241-SX-111, 241-SX-112, 241-SX-113, 241-SX-114, and 241-SX-115) identified in RPP-ENV-39658, Rev. 0, Hanford SX-Farm Leak Assessments Report. This document satisfies the SX Farm portion of the target (T04) in the Hanford Federal Facility Agreement and Consent Order milestone M-045-91F
[en] A ‘preferred’ decommissioning strategy for Chernobyl RBMK Units 1 - 3 envisages safe storage until around 2045 with dismantling complete by 2064. At that point, the graphite will be packed in 200-litre containers and placed into an existing temporary storage facility alongside other wastes, without grouting. Separately, work is in progress on suitable grouts for a final disposal to a repository
[en] This document identifies 241-B Tank Farm (B Farm) leak cause and locations for the 100 series leaking tank (241-B-107) identified in RPP-RPT-49089, Hanford B-Farm Leak Inventory Assessments Report. This document satisfies the B Farm portion of the target (T04) in the Hanford Federal Facility Agreement and Consent Order milestone M-045-91F
[en] Washington River Protection Solutions, LLC uses an earned value management system to flow-down contractual requirements to operational activities. A Rolling Work Window Schedule Process is then used to plan and coordinate near-term operational activities at the Hanford tank farms for execution. This near-term operational planning process has been extended using a Multi-Year Operating Plan, underpinned with a dynamic simulation model, to better link execution of daily activities with mission objectives. (authors)
[en] Industry-standard thermal hazard screening is an effective, cost efficient approach to quickly obtain the required data typically utilized for safe scale-up of chemical processes and to accommodate changes to process recipes. Such thermal hazard screening is directly relevant to the packaging, transport, and storage of radioactive waste that is or can become chemically reactive. For such waste streams it is vital to identify safe temperature and pressure conditions and quantify adiabatic heat and gas generation rates in order to safely accommodate (or preclude) thermal instability within the waste package or storage facility. This paper illustrates widely-used thermal hazard screening bench-scale techniques that lend themselves to quickly identifying reactive hazards while providing directly scalable data for package/storage facility design. Example data are presented with discussion of how the data are analyzed for application to safe packaging and storage. (authors)
[en] Federal and state regulations require hazardous and mixed waste facility workers at treatment and storage facilities (TSFs) and <90-day accumulation areas to be trained in hazardous and mixed waste management. This course will refamiliarize and update <90-day accumulation area workers, TSF workers, and supervisors of TSF workers regarding waste identification, pollution prevention, storage area requirements, emergency response procedures, and record-keeping requirements.
[en] In its role as the Tank Operations Contractor at the U.S. Department of Energy's site in Hanford, WA, Washington River Protection Solutions, LLC is implementing an integrated document control and configuration management system. This system will combine equipment data with technical document data that currently resides in separate disconnected databases. The new system will provide integrated information, enabling users to more readily identify the documents that relate to a structure, system, or component and vice-versa. Additionally, the new system will automate engineering work processes through electronic workflows, and where practical and feasible provide integration with design authoring tools. Implementation of this system will improve configuration management of the technical baseline, increase work process efficiencies, support the efficient design of future large projects, and provide a platform for the efficient future turnover of technical baseline data and information
[en] Pacific Northwest National Laboratory (PNNL) conducted abrasive-wear testing of ball valves used for double valve isolation in nuclear waste process lines. The valve seat materials consisted of KynarR, TefzelR, and ultra-high-molecular-weight polyethylene (UHMWPE). Cycle testing was conducted for 1500 operating cycles for the KynarR and TefzelR valve seats and 5500 cycles for the UHMWPE valve seats. A valve operational cycle consisted of slurry flow, slurry gravity drain, flush water flow, and flush water gravity drain. Both two-way and three-way valves were evaluated, and valves were configured in simulated manifolds so the impact of serving various operational functions (e.g., slurry, flush, or drain control) could be evaluated as some valves are flushed prior to being cycled and others are not. Testing was conducted in PNNL's Multi-Phase Transport Evaluation Loop Facility using a performance-based simulant developed by PNNL specifically for this test program to emulate abrasive slurries for Hanford Tank Farms Waste Transfer System during single-shell tank retrieval and waste feed delivery to the Hanford Tank Waste Treatment and Immobilization Plant. Pre- and post-test valve tear-down evaluations were conducted to observe changes in the condition of internal components for the various seat materials. The various forms of physical wear observed for the different seat materials are presented. The wear results can be used to assess seat materials and valve configurations for application to waste transfer operations, and the observed wear mechanisms can provide insight into assessing valve service life. This information will be used to identify and select additional valve designs that should be evaluated for certification for future use. (authors)
[en] Savannah River National Laboratory (SRNL) analyzed samples from Tank 49H in support of qualification of Salt (Macro)Batch 4 for the Integrated Salt Disposition Project (ISDP). This document reports the results of the analyses of the confirmatory sample of Tank 49H. All sample results either agree with expectations based on prior analyses or are considered trivial enough not to warrant concern. No issues with the projected Salt Batch 4 strategy are identified. This report describes the laboratory results of Salt (Macro)Batch 4 confirmatory sample. These results will be used by Tank Farm Engineering for their blend calculations. This work was specified by Technical Task Request (TTR) and by Task Technical and Quality Assurance Plan (TTQAP).