| DOI | Resolve DOI: https://doi.org/10.1117/12.2296458 |
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| Author | Search for: Chen, Kevin P.; Search for: Zaghloul, Mohamed; Search for: Wang, Mohan; Search for: Huang, Sheng; Search for: Li, Ming-Jun; Search for: Mihailov, Stephen1; Search for: Carpenter, David; Search for: Dow, Joshua; Search for: Grobnic, Dan1; Search for: Hnatovsky, Cyril1; Search for: Hu, L.-W. |
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| Editor | Search for: Dong, Liquan; Search for: Zhang, Xuping; Search for: Xiao, Hai; Search for: Arregui, Francisco Javier |
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| Affiliation | - National Research Council of Canada. Security and Disruptive Technologies
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| Format | Text, Article |
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| Conference | International Conference on Optical Instruments and Technology 2017: Advanced Optical Sensor and Applications, October 28-30, 2017, Beijing, China |
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| Subject | fiber Bragg gratings; fiber optic sensors; sensors for harsh environments |
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| Abstract | This paper reports testing results of radiation resilient fiber Bragg grating (FBG) in radiation resistant fibers in the nuclear reactor core at MIT Research Reactor Lab. FBGs were fabricated by 140-fs ultrafast laser pulse using a phase mask approach. In-core test of fiber Bragg gratings was carried out in the core region of a 6-MW research reactor at temperature > 600°C and an average fast neutron (>1 MeV) flux >1×1014 n/s/cm2. First 100-day tests of FBG sensors shows less than 5 dB reduction in FBG peak strength after over 1×1020 n/cm2 of accumulated fast neutron dosage. To test temporal responses of FBG sensors, a number of reactor anomaly events were artificially created to abruptly change reactor power, temperature, and neutron flux over short periods of time. The thermal optical coefficients and temporal responses of FBG sensors are determined at different accumulated dosages of neutron flux. Results presented in this paper reveals that temperature-stable Type-II FBGs fabricated in radiation-hardened fibers could be used as sensors to perform in-pile measurements to improve safety and efficiency of existing and next generation nuclear reactors. |
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| Publication date | 2017-11-27 |
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| Publisher | SPIE |
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| In | |
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| Series | |
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| Language | English |
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| Peer reviewed | Yes |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | e6b473b7-16f4-4005-8ec0-c0792f0a797b |
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| Record created | 2019-04-26 |
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| Record modified | 2020-03-16 |
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