Initial Investigation of Waste Feed Delivery Tank Mixing and Sampling Issues

摘要

This document is a fiscal year-end progress report covering work completed during the first phase of a three-phase project. Note that this is a progress report since not all of the Phase 1 scope is finished. A final report on Phase 1 work will be issued when this work is completed in FY08. The work for each phase of the project is described below: Phase 1: In this phase, Pacific Northwest National Laboratory (PNNL) will produce a technical overview and assessment of the baseline waste feed delivery mixing system. This overview will be compiled from existing tank farm planning and design documents supplemented by interviews with tank farm staff. The overview will include (1) mixing systems and operation, (2) physical properties, and (3) mixing requirements (mixing, sampling, and flammable gas). The assessment of the baseline will provided by PNNL staff with experience and expertise in jet mixing system performance and waste properties and their behavior. It will include applying relevant material from existing research reports. The final report will identify areas where gaps in the technical basis exist and will recommend activities to estimate the magnitude of technical risk in those areas. Phase 2: PNNL staff will conduct the activities to estimate the technical risks for the gaps identified in Phase 1. Phase 3: PNNL, working with CH2M HILL, will design a technical program that incorporates testing and modeling to reduce the technical risks identified in Phase 1 to quantify waste feed delivery system performance and minimize technical risk. Phase 3 will be contingent upon the results of Phase 2, indicating that some of the technical risks could lead to system performance deficiencies or failure. The initial assessment of the baseline waste feed delivery mixing system that is required as part of the Phase 1 work scope is included in Section 2 and 3. Section 4 follows with a summary of current WTP activities that are relevant to this project.