Assessment of Available Particle Size Data to Support an Analysis of the Waste Feed Delivery System Transfer System

Abstract

Available data pertaining to size distribution of the particulates in Hanford underground tank waste have been reviewed. Although considerable differences exist between measurement methods, it may be stated with 95% confidence that the median particle size does not exceed 275 pm in at least 95% of the ten tanks selected as sources of HLW feed for Phase 1 vitrification in the RPP. This particle size is recommended as a design basis for the WFD transfer system. TRADEMARK DISCLAIMER. Reference herein to any specific mmerciai product, process. or service by trade name. trademark. manufacturer, or otherwlse, does not necessarily constitute or imply its endorsement, recMMnendauOn, n favoring by the United States Government or any agency thereof or its contractors or subcontractors.

Monovalent cations affect the free solution mobility of DNA by perturbing the hydrogen‐bonded structure of water

“…According to their review, most correlations/models were developed for slurries consisting of particles at least 100–200 µm or larger with narrow particle‐size distributions (PSDs) which are typical of the minerals industry. However, the Hanford waste slurries exhibit typically a very broad and continuous size distribution of particles, ranging from O (1) to O (10 2 ) µm in diameter, with a significant fraction, at least 40% of the solids, of very small sizes such as those less than 100 µm (Jewett and Jensen, 2000). Therefore, any of the correlations/models is unlikely to be accurate for describing Hanford tank waste slurries.…”

Tank Waste Transport, Pipeline Plugging, and the Prospects for Reducing the Risk of Waste Transfers

“…The review indicates that most of the experimental data upon which these correlations are based were obtained for heterogeneous slurries with solids having relatively large (150-µm), but narrowly graded, particles size. On the other hand, the Hanford tank solids that have been examined (Jewett and Jensen 2000) appear to have a broad PSD with a mean particle size of 110 µm and a substantial fraction of the particles being less than 100 µm. This suggests that the tank waste be modeled as settling flow (the large particles) with a homogeneous carrier fluid (the carrier liquid plus the fine particles).…”

“…A problem in applying this correlation to tank wastes is that the particles had monodispersed or narrow PSDs. Based on a recent evaluation of particle-size data for Hanford tanks (Jewett and Jensen 2000) for which the data are thought to be most reliable, the particle sizes ranged from 5 to 592 µm with a median of 110 µm. The latter correlation was recommended as a possible option because it was developed for particles with a broad PSD.…”

“…The existing correlations, with the exception of that of Gillies and Shook (1991), were regressed from data for slurries with narrow size distributions and a mean particle size of 100 µm or larger. Jewett and Jensen's (2000) analysis of the best available data for Hanford tanks indicated a broad PSD with a significant fraction below 100 µm. Liddel and Burnett recommended that the correlations be validated by experimental work.…”

Particle Size Analysis of Simulant Sludge Slurries and Tank 40 Radioactive Sludge Slurry

“…Particle size has been shown to affect rheological behavior in studies using non-radioactive sludge slurries and radioactive sludges. 4,5 Sieving is a widely used and inexpensive technique for measuring particle size. The relative simplicity of the technique, low investment, good reliability, and broad size range make it attractive.…”