Radiochemical Reaction Studies of Tritium Mixed Gases by Laser Raman Spectroscopy at TSTA

Sherman, R.H.; Taylor, David J.; Bartlit, J.R.; Anderson, James L.; O’hira, Shigeru; Nakamura, Hirofumi; Konishi, Satoshi; Okuno, Kenji; Naruse, Yuji

doi:10.13182/fst92-a29788

Cited by 10 publications

(6 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Material Science and Technology Division in the Tritium group at Los Alamos National Laboratory, along with a research group from the Japanese Atomic Energy Research Institute, designed a 4 cm 3 flow through cell for near-real time observation of hydrogen mixes 4,5 . They were able to analyze the isotopes in less than two minutes, with detection limits of 0.02%.…”

Section: Brief Review Of Literaturementioning

confidence: 99%

See 1 more Smart Citation

Fiber-Optic Laser Raman Spectroscopy Sensor

Ziegler¹

2003

View full text Add to dashboard Cite

Section: Brief Review Of Literaturementioning

confidence: 99%

“…They were able to analyze the isotopes in less than two minutes, with detection limits of 0.02%. They also determined the first order time constants for hydrogen isotopic exchange rates 4,5 . Uda and coworkers 6 used Raman to analyze isotopic methanes in fusion fuel gas processing systems.…”

Section: Brief Review Of Literaturementioning

confidence: 99%

Fiber-Optic Laser Raman Spectroscopy Sensor

Ziegler¹

2003

View full text Add to dashboard Cite

“…Al4C3 + 5H20 + HTO (6) There is small possibility of other tritiated methane species (CH2T2, CHT3 and CT4) except for CH3T generating. If the reaction (6) is geometrically homogeneous on H20 and HTO, the molar ratio of CH3T to CH2T 2 may be over 1,000, judging from the H to T atomic ratio in the tritium and hydrogen mixture used in the present study.…”

Section: Experimental Apparatusmentioning

confidence: 99%

Generation of Tritiated Methane Using a CuO- Al₄C₃Bed

Fukada

2001

Journal of Nuclear Science and Technology

View full text Add to dashboard Cite

With the supply of a constant flow rate of hydrogen with a constant tritium concentration to a CuO-Al4Cs bed at 573 K, methane with a constant radioactivity was generated at a high conversion ratio. Although tritiated methane was conventionally generated using a set of tritiated water vapor bubbler and an Al4C3 bed, its tritium radioactivity was limited by the saturated water vapor pressure and was dropped by a large decrease in density when water was vaporized. The present CuO-Al4Cs bed can substantially eliminate its limit because of the successive conversion from hydrogen to methane using a CuO-Al4C3 bed heated to 573 K. The difference in output between the ionization chamber and the gas chromatography was discussed based on the complete-mixing series-tank model.

show abstract

“…The Material Science and Technology Division in the Tritium group at Los Alamos National Laboratory, along with a research group from the Japanese Atomic Energy Research Institute, designed a 4 cm 3 flow through cell for near-real time observation of hydrogen mixes. [8,9] They were able to analyze the isotopes in less than two minutes, with detection limits of 0.02%. They also determined the first order time constants for hydrogen isotopic exchange rates.…”

Section: Introductionmentioning

confidence: 99%

“…They also determined the first order time constants for hydrogen isotopic exchange rates. [8,9] Uda and coworkers [10] used Raman to analyze isotopic methanes in fusion fuel gas processing systems. In addition to a flow cell, they used fiber-optics to deliver the laser energy to the cell.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Technologies to Complement/Replace Mass Spectrometers in the Tritium Facilities

Tovo¹,

Lascola²,

Spencer³

et al. 2005

View full text Add to dashboard Cite

EXECUTIVE SUMMARYThe problem of the aging mass spectrometers coupled with lack of vendor support and no viable commercially available replacement presents risks for process control and monitoring in the Tritium Facilities. Therefore, several technologies were evaluated to maintain and, if possible, to enhance the current analytical capabilities provided by the existing mass spectrometers. These technologies included potential replacement/complement mass spectrometers as well as on-line sensors. Based on the results of this evaluation, the Savannah River National Laboratory (SRNL) makes the following recommendations.• Work should begin on implementation of the Quantra Fourier Transform-Ion CyclotronResonance (FT-ICR) as a complement to the existing mass spectrometers or as an on-line process analyzer. In its current configuration, the instrument can measure masses 12 or greater, with a resolution of 30,000 at mass 28, and 100 part per million detection limit using ion ejection of major ions. Thus, the 16-24 mass region that is not so easily separated by the existing Tritium Facility mass spectrometers could be resolved and measured using the FT-ICR. For the FT-ICR (Quantra) to be of even more benefit to the Tritium Facilities, it should be reengineered to provide analysis of masses 2-1000 in a single scan as well as other hardware and software improvements identified during our evaluation (i.e. long term stability, quantitative analysis of mixtures, etc.). In collaboration, SRS, LANL, and Y12 have secured funding for this project and the re-engineering effort will begin in FY06. Once the re-engineering effort is complete, funding will be required for performance testing and implementation in a tritiated environment as well as validation with the design agency.• The bench top magnetic sector mass spectrometer (GCMATE) technology closely matches that of the existing mass spectrometers in the Tritium Facilities. The initial work with the GCMATE indicates that its resolution and sensitivity meet the requirements of a replacement mass spectrometer for the Tritium Facilities. Although this instrument appears to be the most promising as a replacement for the existing mass spectrometers, delayed funding in FY05 precluded a complete evaluation. Therefore, evaluation of this instrument should continue in FY06.• Fiber optic Raman Spectroscopy has been demonstrated as a useful on-line technology for measurement of hydrogen isotopes at a concentration of greater than 1%. The method should be demonstrated on a process containing tritium. Upon successful demonstration in a tritium process, the method should then be implemented on the Hydrogen-Tritium Thermal Cycling Adsorption Process (HT-TCAP) and other processes that would require a detection limit of 1% or greater. Research and development to improve the detection limit of the fiber optic Raman method should continue as this would allow on-line analysis of other process points (i.e. HT-TCAP product and raffinate, Tritium Process Stripper, etc.).• The on-line vapochromic sens...

show abstract

Radiochemical Reaction Studies of Tritium Mixed Gases by Laser Raman Spectroscopy at TSTA

Cited by 10 publications

References 3 publications

Fiber-Optic Laser Raman Spectroscopy Sensor

Fiber-Optic Laser Raman Spectroscopy Sensor

Generation of Tritiated Methane Using a CuO- Al₄C₃Bed

Evaluation of Technologies to Complement/Replace Mass Spectrometers in the Tritium Facilities

Contact Info

Product

Resources

About

Radiochemical Reaction Studies of Tritium Mixed Gases by Laser Raman Spectroscopy at TSTA

Cited by 10 publications

References 3 publications

Fiber-Optic Laser Raman Spectroscopy Sensor

Fiber-Optic Laser Raman Spectroscopy Sensor

Generation of Tritiated Methane Using a CuO- Al4C3Bed

Evaluation of Technologies to Complement/Replace Mass Spectrometers in the Tritium Facilities

Contact Info

Product

Resources

About

Generation of Tritiated Methane Using a CuO- Al₄C₃Bed