Tritium Separation from High Volume Dilute Aqueous Streams- Milestone Report for M3FT-15OR0302092

Bhave, Ramesh R.; Jubin, Robert Thomas; Spencer, Barry B.; Nair, Sankar

doi:10.2172/1254093

Cited by 3 publications

(4 citation statements)

References 6 publications

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“…In the previous milestone reports, it was shown that a high HDO (deuterated water) separation factor of >10 using SAPO-34 membranes could be achieved. 12 The separation factor is the ratio of mole fraction of HDO in the permeate over the mole fraction in the feed and is further discussed in section 2.3. In nuclear fuel reprocessing, process water and acid water streams are recycled and are contaminated with tritiated water.…”

Section: Objectivementioning

confidence: 99%

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Investigation of Sorption and Diffusion Mechanisms, and Preliminary Economic Analysis

Bhave¹,

Jubin²,

Spencer³

et al. 2017

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This report describes the synthesis and evaluation of molecular sieve zeolite membranes to separate and concentrate tritiated water (HTO) from dilute HTO-bearing aqueous streams. Several monovalent and divalent cation exchanged silico alumino phosphate (SAPO-34) molecular sieve zeolite membranes were synthesized on disk supports and characterized with gas and vapor permeation measurements. The pervaporation process performance was evaluated for the separation and concentration of tritiated water.Experiments were performed using tritiated water feed solution containing tritium at the high end of the range (1 mCi/mL) anticipated in a nuclear fuel processing system that includes both acid and water streams recycling. The tritium concentration was about 0.1 ppm. The permeate was recovered under vacuum. The HTO/H2O selectivity and separation factor calculated from the measured tritium concentrations ranged from 0.99 to 1.23, and 0.83-0.98, respectively. Although the membrane performance for HTO separation was lower than expected, several encouraging observations including molecular sieving and high vapor permeance are reported. Additionally, several new approaches are proposed, such as tuning the sorption and diffusion properties offered by small pore LTA zeolite materials, and cation exchanged aluminosilicates with high metal loading. It is hypothesized that substantially improved preferential transport of tritium (HTO) resulting in a more concentrated permeate can be achieved. Preliminary economic analysis for the membrane-based process to concentrate tritiated water is also discussed.

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Section: Objectivementioning

confidence: 99%

“…Analysis of deuterated water was performed using Fourier Transform Infrared Spectroscopy (FTIR) and is described in detail elsewhere. 12 The separation factor of HTO over H2O is defined as:…”

Section: Analysis Of Tritiated Water Samplesmentioning

confidence: 99%

Investigation of Sorption and Diffusion Mechanisms, and Preliminary Economic Analysis

Bhave¹,

Jubin²,

Spencer³

et al. 2017

Self Cite

View full text Add to dashboard Cite

show abstract

“…In the previous milestone reports, it was shown that a high HDO (deuterated water) separation factor of >10 using SAPO-34 membranes could be achieved. 12 The separation factor is the ratio of concentration of HDO in the permeate over the feed concentration and is further discussed in section 2.3. The research described in this report was designed to assess HTO separation with the same SAPO-34 membranes prepared on the inside surface of a tubular alumina support to determine their feasibility for tritiated water treatment.…”

Section: Objectivementioning

confidence: 99%

Section: Analysis Of Tritiated Water Samplesmentioning

confidence: 99%

Synthesis and Performance Evaluations of SAPO-34 Membranes- Milestone Report for FCRD-MRWFD-2016-000263

Bhave¹,

Jubin²,

Spencer³

et al. 2016

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This report describes the synthesis and evaluation of molecular sieve zeolite membranes to separate and concentrate tritiated water (HTO) from dilute HTO-bearing aqueous streams. Several silico alumino phosphate (SAPO-34) molecular sieve zeolite membranes were synthesized on tubular supports and characterized with gas and vapor permeation measurements. The pervaporation process performance was evaluated for the separation and concentration of tritiated water.Experiments were performed over a range of tritiated water concentration that correspond to the range anticipated in a nuclear fuel processing system that includes both acid and water streams recycling. The permeate was recovered under vacuum. The tritium concentration ranged from 0.5 to 1 mCi/mL which is about 0.1 mg/L or 0.1 ppm. The separation factors calculated from the measured tritium concentrations ranged from 0.83-0.98. The HTO concentration was three orders of magnitude lower than prior experiments performed with simulated feed containing HDO (>100 ppm) using deuterated water where high separation factors (>10) were obtained using SAPO membranes on alumina disk supports. Although the membrane performance characterization results for HTO were lower than expected, they can be explained on the basis of low feed volume and three orders of magnitude lower HTO concentration compared to HDO concentration in deuterated water. Several new approaches are proposed, such as tuning the diffusion coefficient of HTO, and optimization of membrane thickness that may help achieve preferential transport of tritium (HTO) resulting in a substantially more concentrated permeate.

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Analysis of deuterated water contents using FTIR bending motion

Park

Kim

Lee

2019

J Radioanal Nucl Chem

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Tritium Separation from High Volume Dilute Aqueous Streams- Milestone Report for M3FT-15OR0302092

Cited by 3 publications

References 6 publications

Investigation of Sorption and Diffusion Mechanisms, and Preliminary Economic Analysis

Investigation of Sorption and Diffusion Mechanisms, and Preliminary Economic Analysis

Synthesis and Performance Evaluations of SAPO-34 Membranes- Milestone Report for FCRD-MRWFD-2016-000263

Analysis of deuterated water contents using FTIR bending motion

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