Long-Term Exposure of Fiber Bragg Gratings in the BR1 Low-Flux Nuclear Reactor

Gusarov, A.

doi:10.1109/tns.2010.2042614

Cited by 29 publications

(6 citation statements)

References 15 publications

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“…Moreover, the RIE phenomenon has been employed for the development of several dosimeter configurations based on radio-and thermo-luminesce effect [33][34][35][36][37]. Afterwards, many studies and reviews also targeted Fiber Bragg Grating (FBG) sensors written in several optical fibers by different techniques and irradiated under different conditions [38][39][40][41][42][43][44][45][46][47].…”

Section: Introductionmentioning

confidence: 99%

Radiation Effects on Long Period Fiber Gratings: A Review

Esposito

Srivastava

Campopiano

et al. 2020

Sensors

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Over the last years, fiber optic sensors have been increasingly applied for applications in environments with a high level of radiation as an alternative to electrical sensors, due to their: high immunity, high multiplexing and long-distance monitoring capability. In order to assess the feasibility of their use, investigations on optical materials and fiber optic sensors have been focusing on their response depending on radiation type, absorbed dose, dose rate, temperature and so on. In this context, this paper presents a comprehensive review of the results achieved over the last twenty years concerning the irradiation of in-fiber Long Period Gratings (LPGs). The topic is approached from the point of view of the optical engineers engaged in the design, development and testing of these devices, by focusing the attention on the fiber type, grating fabrication technique and properties, irradiation parameters and performed analysis. The aim is to provide a detailed review concerning the state of the art and to outline the future research trends.

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Section: Introductionmentioning

confidence: 99%

Radiation Effects on Long Period Fiber Gratings: A Review

Esposito

Srivastava

Campopiano

et al. 2020

Sensors

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“…The first two are common in space, whereas neutrons are found in nuclear reactor cores or fusion-devoted facilities. Test facilities offering these types of beams are less accessible and only a few studies have been published about the FBG response under protons [ 39 , 101 , 102 , 103 , 104 , 105 ], electrons [ 104 ], or neutrons [ 19 , 22 , 23 , 24 , 27 , 28 , 106 ].…”

Section: Radiation Effects On Fbgsmentioning

confidence: 99%

Radiation Effects on Fiber Bragg Gratings: Vulnerability and Hardening Studies

Morana

Marin

Lablonde

et al. 2022

Sensors

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Fiber Bragg gratings (FBGs) are point optical fiber sensors that allow the monitoring of a diversity of environmental parameters, e.g., temperature or strain. Several research groups have studied radiation effects on the grating response, as they are implemented in harsh environments: high energy physics, space, and nuclear facilities. We report here the advances made to date in studies regarding the vulnerability and hardening of this sensor under radiation. First, we introduce its principle of operation. Second, the different grating inscription techniques are briefly illustrated as well as the differences among the various types. Then, we focus on the radiation effects induced on different FBGs. Radiation induces a shift in their Bragg wavelengths, which is a property serving to measure environmental parameters. This radiation-induced Bragg wavelength shift (RI-BWS) leads to a measurement error, whose amplitude and kinetics depend on many parameters: inscription conditions, fiber type, pre- or post-treatments, and irradiation conditions (nature, dose, dose rate, and temperature). Indeed, the radiation hardness of an FBG is not directly related to that of the fiber where it has been photo-inscribed by a laser. We review the influence of all these parameters and discuss how it is possible to manufacture FBGs with limited RI-BWS, opening the way to their implementation in radiation-rich environments.

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“…Until today a lot of researchers have studied the gamma-radiation resistance of the gratings: it depends on several parameters, such as fiber composition, FBG inscription, pre-and post-inscription treatments (see review paper [11] for references). However, only few tests were performed in mixed gamma-neutron environment, as the nuclear reactor cores [12], [13], [14]. The grating sensitivity to mixed gamma-neutron radiation is higher than to pure gamma one and the Bragg wavelength behavior depends a lot on the neutron flux: at high value (>2·10 11 n·cm -2 ·s -1 ) B increases linearly with the dose, whereas at lower flux it shows a saturating trend [12].…”

Section: B Information Expected From the Irradiation In A Mixed Neutmentioning

confidence: 99%

“…The grating sensitivity to mixed gamma-neutron radiation is higher than to pure gamma one and the Bragg wavelength behavior depends a lot on the neutron flux: at high value (>2·10 11 n·cm -2 ·s -1 ) B increases linearly with the dose, whereas at lower flux it shows a saturating trend [12]. However, it has been demonstrated that the temperature sensitivity does not change because of the radiation [14].…”

Section: B Information Expected From the Irradiation In A Mixed Neutmentioning

confidence: 99%

Irradiation campaign in the EOLE critical facility of fiber optic Bragg gratings dedicated to the online temperature measurement in zero power research reactors

Mellier¹,

Morana²,

Cheymol³

et al. 2015

2015 4th International Conference on Advancements in Nuclear Instrumentation Measurement Methods and Their Applications (ANIMMA

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The control of temperature during operation of zero power research reactors participates to the overall control of experimentation conditions and reveals itself of a major importance more especially when measuring small multiplication factor variations. Within the framework of the refurbishment of the MASURCA facility, the development of a new temperature measurement system based on the optical fiber Bragg grating (FBG) technology is under consideration. In a first step, a series of FBGs is irradiated in the EOLE critical facility with the aim to select the most appropriate. Online temperature measurements are performed during a set of irradiations that should allow reaching a fast neutron fluence nearly 5·10 14 n.cm -2 and a total gamma dose less than 4 kGy. The results obtained, especially the Bragg wavelength shifts during the irradiation campaign, are discussed in this paper and compared to data from standard PT100 temperature sensors to highlight possible radiation effects on sensor performances. Work to be conducted during the second step of the project, aiming to a feasibility demonstration using a MASURCA assembly, is also presented.

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Long-Term Exposure of Fiber Bragg Gratings in the BR1 Low-Flux Nuclear Reactor

Cited by 29 publications

References 15 publications

Radiation Effects on Long Period Fiber Gratings: A Review

Radiation Effects on Long Period Fiber Gratings: A Review

Radiation Effects on Fiber Bragg Gratings: Vulnerability and Hardening Studies

Irradiation campaign in the EOLE critical facility of fiber optic Bragg gratings dedicated to the online temperature measurement in zero power research reactors

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