Scour of Cohesive Soil by Submerged Circular Turbulent Impinging Jets

Mazurek, Kerry A.; Rajaratnam, N.; Sego, David C.

doi:10.1061/(asce)0733-9429(2001)127:7(598)

Cited by 79 publications

(35 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, waste chemistry and history also play roles in critical shear stress. Critical shear stress is usually obtained through laboratory or field 2.29 measurements and is related to shear strength (Dunn 1959, Pertheniades 1962, Teeter 1988, Mazurek et al 2001). There are no reported measurements of critical shear stress for Hanford waste.…”

Section: Waste Properties That Affect Pump Suction Of Solidsmentioning

confidence: 99%

Hanford Waste Physical and Rheological Properties: Data and Gaps

Wells¹,

Kurath²,

Mahoney³

et al. 2011

103

View full text Add to dashboard Cite

Executive SummaryThe Hanford Site in Washington State manages 177 underground storage tanks containing approximately 250,000 m 3 of waste generated during past defense reprocessing and waste management operations. These tanks contain a mixture of sludge, saltcake and supernatant liquids. The insoluble sludge fraction of the waste consists of metal oxides and hydroxides and contains the bulk of many radionuclides such as the transuranic components and 90 Sr. The saltcake, generated by extensive evaporation of aqueous solutions, consists primarily of dried sodium salts. The supernates consist of concentrated (5-15 M) aqueous solutions of sodium and potassium salts. The 177 storage tanks include 149 single-shell tanks (SSTs) and 28 double-shell tanks (DSTs).Ultimately the wastes need to be retrieved from the tanks for treatment and disposal. The SSTs contain minimal amounts of liquid wastes, and the Tank Operations Contractor is continuing a program of moving solid wastes from SSTs to interim storage in the DSTs. The Hanford DST system provides the staging location for waste feed delivery to the Department of Energy (DOE) Office of River Protection's (ORP) Hanford Tank Waste Treatment and Immobilization Plant (WTP). The WTP is being designed and constructed to pretreat and then vitrify a large portion of the wastes in Hanford's 177 underground waste storage tanks.The retrieval, transport, treatment and disposal operations involve the handling of a wide range of slurries. Solids in the slurry have a wide range of particle size, density and chemical characteristics. Depending on the solids concentration the slurries may exhibit a Newtonian or a non-Newtonian rheology.The extent of knowledge of the physical and rheological properties is a key component to the success of the design and implementation of the waste processing facilities. These properties are used in engineering calculations in facility designs. Knowledge of the waste properties is also necessary for the development and fabrication of simulants that are used in testing at various scales. The expense and hazards associated with obtaining and using actual wastes dictates that simulants be used at many stages in the testing and scale-up of process equipment. The results presented in this report should be useful for estimating process and equipment performance and provide a technical basis for development of simulants for testing.The purpose of this document is to provide an updated summary of the Hanford waste characterization data pertinent to safe storage, retrieval, transport and processing operations for both the tank farms and the WTP and thereby identify gaps in understanding and data. Important waste parameters for these operations are identified by examining examples of relevant mathematical models of selected phenomena including: The data sets in (UDS composition and particle density, UDS primary particle size and shape, UDS particle size distributions [PSDs], and estimated particle size and density distributions [PSDDs]) and Poloski et al. (2007) ...

show abstract

Section: Waste Properties That Affect Pump Suction Of Solidsmentioning

confidence: 99%

Hanford Waste Physical and Rheological Properties: Data and Gaps

Wells¹,

Kurath²,

Mahoney³

et al. 2011

103

View full text Add to dashboard Cite

show abstract

“…The core length is about six times the nozzle diameter for a water jet injected into water. This is a main reason that the optimal nozzle position is about 8 times the distance from the solid surface to be cut (Moore and Masch 1962, Mazurek et al 2001), as stated previously. As will be discussed, the values of H e and H p could be used to estimate the critical shear stress for erosion (Hanson and Simon 2001).…”

Section: 2mentioning

confidence: 85%

“…There are various other formulas (equivalent of the ECR formulas) in soil mechanics, hydraulics, and chemicals engineering disciplines (Bathija 1982, Mazurek et al 2001. However, no required data (e.g., critical shear stress for erosion) were reported to be collected at the Hanford Site to be able to apply these models to the Hanford waste, as will be discussed in Section 5.…”

Section: 6mentioning

confidence: 99%

See 1 more Smart Citation

Evaluation of Shear Strength Threshold of Concern for Retrieval of Interim-Stored K-Basin Sludge in the Hanford Site

Onishi¹,

Yokuda²,

Schmidt³

2010

View full text Add to dashboard Cite

“…The detachment of cohesive sediment is controlled not only by macroscopic physical sediment properties such as its density but also by inter-particle bond strength and its fabric characteristics (Mazurek et al 2001(Mazurek et al , 2003. Therefore, the erosion process of cohesive sediments depends on both physico-chemical properties and complex mechanical characteristics such as shear stress and shear strength.…”

Section: Introductionmentioning

confidence: 99%

Influence of cohesion on suspended load transport of non-uniform sediments

Jain

Kothyari

2010

Journal of Hydraulic Research

View full text Add to dashboard Cite

Experimental results are presented on suspended load transport rates of clay eroded from a channel bed made up of two types of cohesive sediment mixtures. The first mixture was prepared using fine gravel and clay with the clay proportion by weight varying from 10 to 50%. In the second mixture, equal proportions of fine gravel and fine sand were mixed with clay in proportions of 10 to 50%. Based on dimensional considerations a computational procedure was developed to estimate the rate of suspended load transport of the clay fraction eroded from the cohesive sediment mixtures. In the absence of cohesion, the proposed computational method transforms to a method for computation of suspended load transport rate of the cohesionless sediment mixtures. Studies on suspended load transport rates of cohesive sediment mixtures containing gravel as presented here were not reported so far in the literature to the best of our knowledge.

show abstract

Scour of Cohesive Soil by Submerged Circular Turbulent Impinging Jets

Cited by 79 publications

References 14 publications

Hanford Waste Physical and Rheological Properties: Data and Gaps

Hanford Waste Physical and Rheological Properties: Data and Gaps

Evaluation of Shear Strength Threshold of Concern for Retrieval of Interim-Stored K-Basin Sludge in the Hanford Site

Influence of cohesion on suspended load transport of non-uniform sediments

Contact Info

Product

Resources

About