Radiation resistance of single-mode optical fibres with view to in-reactor applications

Kashaykin, P. F.; Томашук, А.Л.; Vasiliev, S.A.; Ignatyev, A. D.; Shaimerdenov, A.A.; Ponkratov, Yu.V.; Kulsartov, T.; Kenzhin, E.A.; Гизатулин, Ш. Х.; Zholdybayev, T. K.; Chikhray, Y.; Semjonov, Sergey L.

doi:10.1016/j.nme.2021.100981

Cited by 21 publications

(7 citation statements)

References 40 publications

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“…The spectra (Figure 3b) show that this is due to the fact that the LWL RIA begins to prevail over the SWL RIA. Similar RIA kinetics are also observed during reactor irradiation of OF [3,4], which suggests similar mechanisms for the appearance of LWL RIA during both gamma-and mixed gammaneutron irradiation.…”

Section: Resultssupporting

confidence: 65%

“…Optical fibers (OF) have currently found wide application in various fields of science and technology from high-speed information transmission to fiber lasers and precision sensors of various physical quantities. Nevertheless, the use of OFs in nuclear and fusion installations, including the international experimental fusion reactor ITER, leads to degradation of their optical properties due to the appearance of additional radiation-induced attenuation (RIA) of light [1][2][3][4]. This phenomenon considerably limits the use of OF in conditions of increased radiation levels and, therefore, there is an urgent need to reduce RIA to an acceptable level for a particular application.…”

Section: Introductionmentioning

confidence: 99%

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Gamma-Radiation-Induced Attenuation of Light in Pure-Silica Core Optical Fiber in Long-Wavelength Region

Kashaykin

Поспелова

Kenzhina

et al. 2022

ijmph

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The dependences of the spectra of radiation-induced attenuation (RIA) of light in a puresilica core (PSC) optical fiber (OF) during and after gamma-irradiation up to 590 kGy at a dose rate of 7.6 Gy/s in the near infrared range have been investigated. It was shown that starting with an absorbed dose of ~100 kGy, the RIA at 1550 nm becomes larger than at 1310 nm due to an increase in long-wavelength (LWL) RIA. The absorption band, with a maximum at a wavelength near 1800 nm, responsible for the LWL RIA is fully defined for the first time. At an absorbed dose of 590 kGy at wavelengths of 1310 and 1550 nm, the RIA is 14.1 and 23.3 dB/km, respectively. During 3.5 years of annealing of the OF at room temperature the RIA in the entire spectral range of 1100-1700 nm decreases by 40-50%. The LWL RIA can be complex, consisting of short-lived and long-lived components. The short-lived component may be LTIRA (low temperature infra-red absorption).

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Section: Resultssupporting

confidence: 65%

Section: Introductionmentioning

confidence: 99%

Gamma-Radiation-Induced Attenuation of Light in Pure-Silica Core Optical Fiber in Long-Wavelength Region

Kashaykin

Поспелова

Kenzhina

et al. 2022

ijmph

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“…However, it can be assumed that it is caused by the contraction of the polyimide coating due to the simultaneous action of intensive gamma-neutron irradiation, high temperature and vacuum. Previously, we also observed the anomalous behavior of RIA in polyimidecoated fibers during reactor irradiation under the same conditions [3].…”

supporting

confidence: 59%

Radiation resistance of fiber Bragg gratings during reactor irradiation process P.

Kashaykin¹,

Vasiliev²,

Tomashuk³

et al. 2022

RFL

Self Cite

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“…For our confocal chromatic design, we need to choose glasses or optical fibers presenting lower RIA in the spectral domain of interest. For optical fibers, few data are available in the literature at high neutron fluence with a lack of information on the behavior at high temperature and/or a large spectral domain [9][10][11][12][13][14][15][16]. We will select a pure silica (or slightly F-doped silica) core optical fiber with a metallic coating to withstand the high temperature.…”

Section: A State Of the Artmentioning

confidence: 99%

Confocal chromatic sensor for displacement monitoring in research reactor

Agoyan

Fourneau²,

Cheymol³

et al. 2021

EPJ Web Conf.

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Confocal chromatic microscopy is an optical technique allowing measuring displacement, thickness, and roughness with a sub-micrometric precision. Its operation principle is based on a wavelength encoding of the object position. Historically, the company STIL based in the south of France has first developed this class of sensors in the 90’s. Of course, this sensor can only operate in a sufficiently transparent medium in the used spectral domain. It presents the advantage of being contactless, which is a crucial advantage for some applications such as the fuel rod displacement measurement in a nuclear research reactor core and in particular for cladding-swelling measurements. The extreme environmental conditions encountered in such experiments i.e. high temperature, high pressure, high radiations flux, strong vibrations, surrounding turbulent flow can affect the performances of this optical system. We then need to implement mitigation techniques to optimize the sensor performance in this specific environment. Another constraint concerns the small volume available in the irradiation rig next to the rod to monitor, implying the challenge to conceive a miniaturized sensor able to operate under these constraints.

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Radiation resistance of single-mode optical fibres with view to in-reactor applications

Cited by 21 publications

References 40 publications

Gamma-Radiation-Induced Attenuation of Light in Pure-Silica Core Optical Fiber in Long-Wavelength Region

Gamma-Radiation-Induced Attenuation of Light in Pure-Silica Core Optical Fiber in Long-Wavelength Region

Radiation resistance of fiber Bragg gratings during reactor irradiation process P.

Confocal chromatic sensor for displacement monitoring in research reactor

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