Novel thermometry approaches to facilitate safe and effective monitoring of nuclear material containers

Machin, G.; Simpson, Robert L.; Sutton, Gavin; Bond, W; Heaps, Edward; Hayes, Michael M.; Korniliou, Sofia; McMillan, Jamie; Norman, J. G. S.; Sposito, Alberto; Panicker, Vivek; Adamska, Anna; Allen, Augustine O.; Bernard, R.; Clarke, Sandra; Clifford, Jantina; Gallagher, Christopher; Jowsey, J.

doi:10.1016/j.nucengdes.2020.110939

Cited by 4 publications

(1 citation statement)

References 6 publications

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“…These techniques have found a foothold in civil infrastructure and industrial applications [83,86,109,163]. For example, fiber-coupled phosphor thermometry is being used in monitoring nuclear storage infrastructure [164,165] while FBGs have been utilized in civil infrastructure such as bridges and powerplants [83,86]. Despite their commercial appeal, the metrological performance of devices such as FBG thermometers is only now being rigorously assessed.…”

Section: Future Of the Defined-scale Thermometrymentioning

confidence: 99%

Emerging technologies in the field of thermometry

Dedyulin

Ahmed²,

Machin³

2022

Meas. Sci. Technol.

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The past decade saw the emergence of new temperature sensors that have the potential to disrupt a century-old measurement infrastructure based on resistance thermometry. In this review we present an overview of emerging technologies that are either in the earliest stages of metrological assessment or in the earliest stages of commercial development and thus merit further consideration by the measurement community. The following emerging technologies are reviewed: Johnson noise thermometry, optical refractive-index gas thermometry, Doppler line broadening thermometry, optomechanical thermometry, ﬁber-coupled phosphor thermometry, ﬁber-optic thermometry based on Rayleigh, Brillouin and Raman scattering, ﬁber-Bragg-grating thermometry, Bragg-waveguide-grating thermometry, ring-resonator thermometry, and photonic-crystal-cavity thermometry. For each emerging technology, we explain the working principle, highlight the best known performance, list advantages and drawbacks of the new temperature sensor and present possibilities for future developments.

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Section: Future Of the Defined-scale Thermometrymentioning

confidence: 99%

Emerging technologies in the field of thermometry

Dedyulin

Ahmed²,

Machin³

2022

Meas. Sci. Technol.

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Toward Gamma Ray Immune Fibre-Optic Phosphor Thermometry for Nuclear Decommissioning

et al. 2022

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Temperature measurement of stored nuclear waste is important for long-term monitoring. Conventional sensors can degrade in ionizing radiation from induced transmutations and their frequent replacement is inconvenient. A thermometer based on suitable phosphors can overcome some problems, but the optical signal needs to be transmitted through an optical fibre and processed remotely away from the dangerous area. This requires that the optical fibre itself be suitably resistant to radiation-induced damage. Here, we report transmission measurements through a type of hollow-core fibre based on anti-resonance and with transmission windows at wavelengths suitable for use with the thermographic phosphor magnesium fluorogermanate whilst subjected to gamma radiation. Its performance is compared to commercially available standard fibres (single mode and radiation hard fibres) at dose rates equivalent to decades of use in a storage facility. Transmission was unchanged for the anti-resonant fibre at the phosphor emission wavelength and it was successfully incorporated into a fibre thermometer that worked from $${20}\,^{\circ }\hbox {C}$$ 20 ∘ C to $$200\,^{\circ }\hbox {C}$$ 200 ∘ C . Performance at the phosphor excitation wavelength needs to be improved by modification to the hollow-core fibre design, but we show that a hybrid of single mode and anti-resonant fibres can already be made into a thermometer with suitable gamma immunity.

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The information system concept for thermal monitoring of a spent nuclear fuel storage container

Alyokhina

2023

Nuclear Engineering and Technology

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Novel thermometry approaches to facilitate safe and effective monitoring of nuclear material containers

Cited by 4 publications

References 6 publications

Emerging technologies in the field of thermometry

Emerging technologies in the field of thermometry

Toward Gamma Ray Immune Fibre-Optic Phosphor Thermometry for Nuclear Decommissioning

The information system concept for thermal monitoring of a spent nuclear fuel storage container

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