Conceptual models for waste tank mechanistic analysis. Status report, January 1991

Allemann, R.T.; Antoniak, Z.I.; Eyler, L.L.; Liljegren, L.M.; Roberts, J.S.

doi:10.2172/5671457

Cited by 11 publications

(17 citation statements)

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“…In the early 1990s, PNNL staff began developing models of mixer pump performance at Hanford (Allemann et al 1992;Bamberger et al 1993b). These studies included some general investigations on the difference between Newtonian and non-Newtonian fluids in mixing problems (Recknagle and Shekarriz 1998).…”

Section: Cfd Studiesmentioning

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: Cfd Studiesmentioning

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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“…A number of studies have been performed to quantify the sludge material behavior and the mechanisms of bubble generation for waste in double-shell waste storage tanks (Allemann et al 1990a(Allemann et al , 1990b(Allemann et al , 1991(Allemann et al , 1993Trent and Michener 1993;Gauglitz et al 1994Gauglitz et al , 1995. In these studies, the waste is reported to be separated into an upper convective layer of supernatant liquid and a lower nonconnective layer of sludge.…”

Section: Sludge Behaviormentioning

confidence: 99%

Probabilistic finite element modeling of waste rollover

Khaleel¹,

Cofer²,

Al-fouqaha³

1995

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“…Uncertainties in the data are relatively high because of dilution of the liberated gases by a continuous flow of vent gas. Allemann (1991) reviewed the gas composition results for a series of gas releases from April 1990 to February 1991, and concluded that data corresponding to the October 24, 1990, release event are the most promising for an estimate of composition.…”

Section: Gas Analysesmentioning

confidence: 99%

“…The non-condensable fraction of released gases consists of 39 vol% hydrogen, 31 vol% NeO, and 29 vol% nitrogen, based on data from the October 24, 1990, release (Barker 1991;Allemann 1991) with uncertainties of -+ 2 percent. Gas compositions for this release event are listed in Table 4.…”

Section: Gas Analysesmentioning

confidence: 99%

Gas generation and retention in Tank 101-SY: A summary of laboratory studies, tank data, and information needs

Pederson

Ashby

Jonah³

et al. 1992

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This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor Battelle Memorial Institute, nor any of their employees, makes any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represenls that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise cloesnot necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof, or Battelle Memorial Institute. The views and opinions of'authors expressed herein do not necessarily state or reflect thoseof'he United States Government or _ny agency thereof. PACIFIC NORTHWEST LABORATORY operated by BATTELLE MEMORIAL INSTITUTE for the UNITED STATES DEPARTMENT OF ENERGY under Contract DE-ACO6.76RLO 1830 Printedin the United Statesof America Availableto DOE andDOE contractorsfrom the Office of ScientificandTechnicalInformation,P.O. Box62, Oak Ridge,TN 37831; pricesavailablefrom (615) 576-8401. FTS626.8401. Availableto the publicfrom the NationalTechnicalInformationService, U.S. Departmentof Commerce,5285 Port RoyalRd., Springfield,VA 22161.

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Conceptual models for waste tank mechanistic analysis. Status report, January 1991

Cited by 11 publications

References 0 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

Probabilistic finite element modeling of waste rollover

Gas generation and retention in Tank 101-SY: A summary of laboratory studies, tank data, and information needs

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