Cross-Site Transfer System at Hanford: long-term strategy for waste acceptance

Shekarriz, A.; Onishi, Y.; Smith, Paul A.; Sterner, Matthew A.; Rector, David R.; Virden, Jud W.

doi:10.2172/477519

Cited by 4 publications

(5 citation statements)

References 16 publications

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“…This phenomenon has similarity to the focus of this report, which is mobilizing and suspending particles in DSTs with turbulent jets, so some pertinent literature is discussed. Shekarriz et al (1997b) summarized results of a technical panel review of the methodology for accepting waste for transport through the Hanford Replacement Cross-Site Transfer System, which was constructed to replace the existing pipelines that hydraulically connect the 200 West and 200 East Areas. Poloski et al (2009a, b) conducted transport studies to determine deposition velocities for non-Newtonian and Newtonian slurries in pipelines to support Waste Treatment Plant operations.…”

Section: Pipeline Transportmentioning

confidence: 99%

The Role of Cohesive Particle Interactions on Solids Uniformity and Mobilization During Jet Mixing: Testing Recommendations

Gauglitz¹,

Wells²,

Bamberger³

et al. 2010

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Executive SummaryRadioactive waste that is currently stored in large underground tanks at the Hanford Site will be staged in selected double-shell tanks (DSTs) and then transferred to the Waste Treatment and Immobilization Plant (WTP). Before being transferred, the waste will be mixed, sampled, and characterized to determine if the waste composition meets the waste feed specifications. Washington River Protection Solutions (WRPS) is conducting a Tank Mixing and Sampling Demonstration Program to determine the mixing effectiveness of the current baseline mixing system that uses two jet mixer pumps to mobilize and mix waste in DSTs and to determine the adequacy of the planned sampling method. The overall purpose of the demonstration program is to mitigate the technical risk associated with the mixing and sampling systems meeting the feed certification requirements for transferring waste to the WTP.A critical aspect of meeting the feed certification requirements is ensuring that the collected samples will adequately represent the contents of the tank and that all batches of transferred waste are sufficiently uniform so that they all are equivalent to the characterized samples. However, the tank waste contains slurries of solid particles that settle and may become progressively more concentrated towards the bottom of the tank. Obtaining a perfectly uniform distribution of waste in the DSTs with a mixing system may not be possible. To determine how close this ideal can be approached, the expected performance of the DST mixing and sampling systems must be quantified. There have been a number of laboratory studies and full-scale tank farm studies that evaluated mixing behavior; these studies are discussed later in this report. However, these studies do not provide adequate quantitative information to evaluate the performance of the planned sampling and the batch uniformity. Accordingly, WRPS' demonstration program is focusing specifically on quantifying the uniformity of samples and batch transferred material to reduce the technical risk associated with these systems.The first phase of the demonstration program is to conduct scaled tests that appropriately match fullscale behavior and to evaluate sampling methodologies and the uniformity of batch transfers. The initial scaled testing will use non-cohesive particles where the particles do not have cohesive interactions that would cause the particles to stick together. The purpose of this report is to analyze existing data and evaluate whether scaled mixing tests with cohesive simulants are needed to meet the overall objectives of the small-scale mixing demonstration program. This evaluation will focus on estimating the role of cohesive particle interactions on various physical phenomena that occur in parts of the mixing process. A specific focus of the evaluation will be on the uniformity of suspended solids in the mixed region.The evaluation shows that cohesive particle interaction will have multiple effects through a number of different mechanisms. Some of the effects ...

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Section: Pipeline Transportmentioning

confidence: 99%

The Role of Cohesive Particle Interactions on Solids Uniformity and Mobilization During Jet Mixing: Testing Recommendations

Gauglitz¹,

Wells²,

Bamberger³

et al. 2010

View full text Add to dashboard Cite

show abstract

“…Shekarriz et al (1997), building on the method proposed by Hudson (1996), recommended an iterative approach that involved (1) predictive analysis, (2) validation using laboratory data and field experiments, and (3) control analysis. They proposed to calculate the solids volume fraction and composition prior to transfer using an equilibrium chemical code and to calculate the critical velocity and pressure drop using the correlations of and Wasp et al (1979).…”

Section: Assessment Of Existing Tools and Proceduresmentioning

confidence: 99%

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

Welch¹

2001

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“…The water analyzer module was used to for charge reconciliation according to the method described in an earlier report. 22 The stream was then routed to the ESP Process Module where a single separation block was used.…”

Section: Task 3 Hanford Tank Waste Chemistrymentioning

confidence: 99%

“…The literature search was conducted on waste transfer at the site and the Replacement Cross Site Transfer System (RCSTS). [21][22][23] The information available on the design of the RCSTS stated that the pipeline is 6.2 miles long with two booster pumps. The channel is a 3.0-inch schedule 40 (304 stainless steel) pipe.…”

Section: Operating Envelope For Reliable Waste Slurry Transfer At Hanmentioning

confidence: 99%

Instrumentation Development, Measurement and Performance Evaluation of Environmental Technologies

UNKNOWN¹

2001

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Cross-Site Transfer System at Hanford: long-term strategy for waste acceptance

Cited by 4 publications

References 16 publications

The Role of Cohesive Particle Interactions on Solids Uniformity and Mobilization During Jet Mixing: Testing Recommendations

The Role of Cohesive Particle Interactions on Solids Uniformity and Mobilization During Jet Mixing: Testing Recommendations

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

Instrumentation Development, Measurement and Performance Evaluation of Environmental Technologies

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