Application of stable boron isotopes

Potapov, S.P.

doi:10.1007/bf01846087

Cited by 7 publications

(3 citation statements)

References 10 publications

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“…An increased isotopic concentration of 10 B has long been used within the nuclear industry to improve the performance of neutron absorbing control rods and neutron counters [16]. Because of the 10% difference in nuclear mass between the two isotopes, and the relatively large (20%) natural abundance of the 10 B isotope, the concentration can be increased relatively easily for example by gas diffusion [17].…”

Section: The Depletion Of the 10 B Isotope During Fusion Operationsmentioning

confidence: 99%

Activation and transmutation of tungsten boride shields in a spherical tokamak

et al. 2022

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The FISPACT-II code is used to compute the levels of activation and transmutation of tungsten borides for shielding the central High Temperature Superconductor (HTS) core of a spherical tokamak fusion power plant during operations at 200 MW fusion power for 30 years and after shutting down for 10 years. The materials considered were W2B, WB, W2B5 and WB4 along with a sintered borocarbide B0.329C0.074Cr0.024Fe0.274W0.299, monolithic W and WC. Calculations were made within shields composed of each material, for five reactor major radii from 1400 to 2200 mm, and for six 10B isotope concentrations and at five positions across the shield. The isotopic production and decay in each shield is detailed. The activation of boride materials is lower than for either W or WC and is lowest of all for W2B5. While isotopes from tungsten largely decay within 3 years of shut-down, those from boron have a much longer decay life. An acceptable 70% of the absorbing 10B isotope will remain after 30 years of operations behind the first wall for a 1400 mm radius tokamak. Gaseous production is problematic in boride shields, where 4He in particular is produced in quantities 3 orders of magnitude higher than in W or WC shields. The FISPACT-II displacements per atom (dpa) tend to increase with boron content, although they decrease with increased 10B isotopic content. The dpa ranges of boride shields tend to lie between those of W and WC. Overall, the results confirm that the favourable fusion reaction shielding properties of W2B5 are not seriously challenged by its irradiation and transmutation properties, although helium gas production could be a challenge to its thermal and mechanical properties.

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Section: The Depletion Of the 10 B Isotope During Fusion Operationsmentioning

confidence: 99%

Activation and transmutation of tungsten boride shields in a spherical tokamak

et al. 2022

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“…10 B has a large thermal neutron capture cross section (3837 barn), and this excellent property makes it an indispensable material in nuclear technology. It is used in the rods of the control and protection systems of nuclear reactors to compensate for a surplus of reactivity and as a neutron shielding material to prevent activation during the neutron exposure. , Moreover, the 10 B isotope is useful in the boron neutron capture therapy (BNCT) for the treatment of cancers . In contrast to 10 B, the 11 B isotope has a very small neutron capture cross section (<0.05 barn).…”

Section: Introductionmentioning

confidence: 99%

“…In contrast to 10 B, the 11 B isotope has a very small neutron capture cross section (<0.05 barn). Due to this property, the 11 B isotope is used for constructing radiation-resistant materials. , Because of the very different neutron capture properties of the two isotopes, it is essential to separate them for their respective applications. The price of the separated boron isotopes is 1000 times higher than the natural mixtures, and the demand for the separated boron isotopes has been sharply increasing …”

Section: Introductionmentioning

confidence: 99%

Process Modeling of Boron Isotopes Separation by Cross-Current and Counter-Current Solvent Extraction

Tan

Zhang

et al. 2022

Ind. Eng. Chem. Res.

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Boron has two stable isotopes, namely, 10 B and 11 B, which play important roles in the nuclear industry due to their excellent neutron absorption ( 10 B) and neutron transmission ( 11 B) properties, respectively. Nevertheless, the separation of the two isotopes is extremely difficult because of their very similar chemical properties. The traditional separation method based on the chemical-exchange rectification of BF 3 and ethers is highly corrosive and requires expensive equipment. The separation based on solvent extraction (SX) of boric acid is potentially a greener alternative. Here we present the process modeling of SX separation of boron isotopes. The effects of separation factor, extraction ratio, and extraction stages on the purity and yield of boron isotopes have been discussed in detail. In the cross-current SX, the enrichment of isotopes increases linearly with increasing extraction stages, while the yield decreases exponentially, consequently the separation of the isotopes is not possible. In the counter-current SX, the enrichment of the isotope increases with increasing extraction stages, and the yield is ≥1 − E Y (E Y is the extraction ratio of the less extractable isotope). Assuming the separation factor β = 1.02, 11 B and 10 B can be enriched to be ≥95% in about 200 and 500 extraction stages, respectively. The higher the separation factor, the faster enrichment and the higher yield. Therefore, future research should focus on increasing the separation factor and on the precise control of hundreds of extraction stages.

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2,4-Difluoro anisole: a promising complexing agent for boron isotopes separation by chemical exchange reaction and distillation

Bai

Guo

et al. 2014

J Radioanal Nucl Chem

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Application of stable boron isotopes

Cited by 7 publications

References 10 publications

Activation and transmutation of tungsten boride shields in a spherical tokamak

Activation and transmutation of tungsten boride shields in a spherical tokamak

Process Modeling of Boron Isotopes Separation by Cross-Current and Counter-Current Solvent Extraction

2,4-Difluoro anisole: a promising complexing agent for boron isotopes separation by chemical exchange reaction and distillation

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