The replacement of cadmium as a thermal neutron filter

D'Mellow, Bob; Thomas, David J.; Joyce, Malcolm J.; Kolkowski, P; Roberts, Neil; Monk, Stephen

doi:10.1016/j.nima.2007.05.001

Cited by 49 publications

(17 citation statements)

References 5 publications

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“…A layer of 0.32 cm (ρ¼ 1.64 g/cm 3 ) was found to be equivalent to 0.5 cm of polystyrene (ρ¼ 1.05 g/cm 3 ). This equivalence does not depend on the primary photon field energy, since the out-of-axis photon spectrum is invariably composed by photons below 0.5 MeV (D'Mellow et al, 2007;Chofor et al, 2012). In addition, due to the high neutron capture cross section of 10 B, the borated rubber acts as an efficient neutron absorber (Guardiola et al, 2013; http:// www.johncaunt.com/shielding/neutron-shielding/jc238/), with a nominal thermal neutron transmission factor of 3.8 Â 10 À 3 .…”

Section: The Borated Rubbermentioning

confidence: 95%

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Improving the neutron-to-photon discrimination capability of detectors used for neutron dosimetry in high energy photon beam radiotherapy

Irazola

Terrón

Bedogni

et al. 2016

Applied Radiation and Isotopes

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Section: The Borated Rubbermentioning

confidence: 95%

“…deqtech.com/Shieldwerx/Data_Sheets/SWX-238.pdf), was used. This material (Gómez et al, 2010;D'Mellow et al, 2007) is expected to reduce incident thermal neutron field to less than 1%. Thus, the pure thermal neutron reading of a detector can be obtained by subtracting the reading of the rubber-covered detector to the uncovered one.…”

Section: Introductionmentioning

confidence: 99%

Improving the neutron-to-photon discrimination capability of detectors used for neutron dosimetry in high energy photon beam radiotherapy

Irazola

Terrón

Bedogni

et al. 2016

Applied Radiation and Isotopes

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“…The proposed unit is designed according to article 4 of the RoHS Directive 2002/95/EC, regarding the choice of materials. Hence, lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls and polybrominated diphenyl ethers have been excluded from the design [24].…”

Section: The Neutron Generator and The Radiography Unitmentioning

confidence: 99%

Non destructive testing of medium and high voltage cables with a transportable radiography system

Fantidis¹,

Potolias²,

Bandekas³

et al. 2010

JESTR

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A power cable is the most important part in a power transmission system. The cables must be total quality dedicated and certified for development, manufacturing and installation, however are exposed to a corrosive environment. The purpose of this paper is to show that the fast neutron radiography with a transportable system is a solution to find defects in the cables and reduce the cost of inspection. The design, regarding the materials considered, was compatible with the European Union Directive on "Restriction of Hazardous Substances" (RoHS) 2002/95/EC, hence excluding the use of cadmium and lead.Wide width values for the collimator ratio were calculated. With suitable collimator design it was possibly to optimize the neutron radiography parameters. Finally the shielding design was examined closely. The proposed system has been simulated using the MCNPX code.

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“…Particularly, the tunable nanospaces provide ideal accommodation for polymer chains and afford unique interpenetrated composite structure, which may be helpful to create structure‐function‐combining composites. Moreover, owing to the high neutron capture cross section (2450 b) of gadolinium, Gd‐MOF can be introduced into the polymer matrix, achieving the desired neutron shielding effect.…”

Section: Introductionmentioning

confidence: 99%

Structure‐thermal activity relationship in a novel polymer/MOF‐based neutron‐shielding material

Zhai

Song

et al. 2019

Polymer Composites

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Using epoxy resin (EP), a thermosetting polymer, as a neutron shielding material in nuclear facilities has become increasingly attractive because it is lightweight and has an excellent durability over neutron irradiation. However, it suffers from drawbacks such as reduced mechanical strength when mixed with functional fillers to improve the neutron shielding properties. In order to solve the issue, in this article, EP/gadolinium metal‐organic framework (Gd‐MOF) composites were successfully prepared, affording a new structural and functional composite with high thermal neutron shielding ability as well as good mechanical property. The shore hardness and Young's modulus of MOF/EP composites were increased remarkably compared with neat EP. Meanwhile, results indicated that the thermal performance of Gd‐MOF/EP composites was obviously increased with the addition of MOF fillers. The proposed mechanism of thermal stability improvement may provide deeper understanding of the structure‐activity relationship in thermosetting resin‐MOF composites for radiation protection application and other relevant academic research.

show abstract

The replacement of cadmium as a thermal neutron filter

Cited by 49 publications

References 5 publications

Improving the neutron-to-photon discrimination capability of detectors used for neutron dosimetry in high energy photon beam radiotherapy

Improving the neutron-to-photon discrimination capability of detectors used for neutron dosimetry in high energy photon beam radiotherapy

Non destructive testing of medium and high voltage cables with a transportable radiography system

Structure‐thermal activity relationship in a novel polymer/MOF‐based neutron‐shielding material

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