2014
DOI: 10.1080/00223131.2014.924883
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Development of radiation-resistant optical fiber for application to observation and laser spectroscopy under high radiation dose

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Cited by 42 publications
(19 citation statements)
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“…In addition, we are proposing an in-vessel inspection technique by visual observation [5], ultimate analysis by laser induced breakdown spectroscopy (LIBS) with near-infrared light [5,7] and radiation monitoring using scintillator with red or near-infrared wavelength light emission. The complex remote sensing system requires a high radiation resistant optical fiber for visible and near-infrared light to transmit image signals, laser beam, emission light by LIBS and scintillation by gamma rays.…”
Section: Resultsmentioning
confidence: 99%
See 1 more Smart Citation
“…In addition, we are proposing an in-vessel inspection technique by visual observation [5], ultimate analysis by laser induced breakdown spectroscopy (LIBS) with near-infrared light [5,7] and radiation monitoring using scintillator with red or near-infrared wavelength light emission. The complex remote sensing system requires a high radiation resistant optical fiber for visible and near-infrared light to transmit image signals, laser beam, emission light by LIBS and scintillation by gamma rays.…”
Section: Resultsmentioning
confidence: 99%
“…No change in infrared images was noted between pre-and post-irradiation. The cladding thickness of the tested fiber was approximately 3.3 μm for visible light only [5].…”
Section: Radiation Resistant Image Fiber For Practical Usementioning
confidence: 99%
“…However, although optical fiber is an essential equipment for this process, it is common knowledge that in the case of laser cutting, the optical fiber exhibits color center due to γ ‐ray irradiation, thereby losing its optical transparency [11]. Notably, previous research has clarified that a color center is generated by γ ‐ray irradiation of approximately ∼10 6 Gy [12]. Therefore, it remains unclear whether the performance of the original laser cutting method can be effectively leveraged in an accident‐damaged nuclear reactor, where the interior of the containment vessel is contaminated with high‐level radiation.…”
Section: Introductionmentioning
confidence: 99%
“…Thus they are not easily transferable to power-resolved imaging or operational reactors that require assay of the neutron emission, let alone the immediate aftermath post-accident. There have been complementary reports of systems for internal inspection of failed reactor plant 4 but these are intrusive and provide for the survey of fuel debris inside reactor plant once access to a stricken reactor is achieved. In terms of imaging the stricken reactor itself, the most evolved technique is the use of cosmic-ray muons 5 that can non-intrusively reveal the distribution of fuel debris in a reactor, though not the reactivity profile.…”
mentioning
confidence: 99%