{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T01:41:27Z","timestamp":1760233287557,"version":"build-2065373602"},"reference-count":28,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2022,12,30]],"date-time":"2022-12-30T00:00:00Z","timestamp":1672358400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"European Union\u2019s Horizon 2020 research and innovation program under Marie Sk\u0142odowska-Curie","award":["722509","662177"],"award-info":[{"award-number":["722509","662177"]}]},{"name":"Euratom research and training program 2014\u20132018","award":["722509","662177"],"award-info":[{"award-number":["722509","662177"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>This paper presents the measurement methodology of diameter reduction monitoring of micro-tunnel structures used for radioactive waste storage based on distributed strain measurements along fiber optic sensors installed on the circumference. The whole measurement procedure is described: the calibration of the sensors for use in harsh environment (temperature and radioactivity), the measurement analysis technique, the performance assessment of different measurement systems on a surface mock-up and the in-situ validation on an underground structure. The performances of Brillouin and Rayleigh backscattering measurements are compared, as well as different fixation technologies. Distributed measurements are compared to alternative measurements: displacement sensors, Bragg grating extensometers and MEMS accelerometers. The distributed Rayleigh backscattering measurement performed on optical cables bonded to the surface of the structure appears to be the best solution for monitoring the convergence of micro-tunnels and offers comparable performance to alternative technologies tested on the surface demonstrator.<\/jats:p>","DOI":"10.3390\/s23010398","type":"journal-article","created":{"date-parts":[[2022,12,30]],"date-time":"2022-12-30T03:19:46Z","timestamp":1672370386000},"page":"398","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Performance Assessment of Distributed Strain Sensing Techniques for Convergence Monitoring of Radioactive Waste Repository"],"prefix":"10.3390","volume":"23","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2878-8058","authenticated-orcid":false,"given":"Arianna","family":"Piccolo","sequence":"first","affiliation":[{"name":"French National Radioactive Waste Management Agency (Andra), 92298 Chatenay-Malabry, France"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9441-310X","authenticated-orcid":false,"given":"Yann","family":"Lecieux","sequence":"additional","affiliation":[{"name":"Laboratoire GeM UMR 6183, Nantes Universit\u00e9, 44000 Nantes, France"}]},{"given":"Sylvie","family":"Lesoille","sequence":"additional","affiliation":[{"name":"French National Radioactive Waste Management Agency (Andra), 92298 Chatenay-Malabry, France"}]},{"given":"Pierre","family":"Teixeira","sequence":"additional","affiliation":[{"name":"D\u00e9partement Instrumentation d\u2019EGIS, 38180 Seyssins, France"}]},{"given":"Johan","family":"Bertrand","sequence":"additional","affiliation":[{"name":"French National Radioactive Waste Management Agency (Andra), 92298 Chatenay-Malabry, France"}]},{"given":"Dominique","family":"Leduc","sequence":"additional","affiliation":[{"name":"Laboratoire GeM UMR 6183, Nantes Universit\u00e9, 44000 Nantes, France"}]}],"member":"1968","published-online":{"date-parts":[[2022,12,30]]},"reference":[{"key":"ref_1","unstructured":"Andra (2022, November 27). Safety Options Report\u2014Operating Part; Technical Report; 2016. Available online: https:\/\/international.andra.fr\/documents-and-visual-ressources."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"221","DOI":"10.1016\/j.jrmge.2013.05.005","article-title":"Short- and long-term behaviors of drifts in the Callovo-Oxfordian claystone at the Meuse\/Haute-Marne Underground Research Laboratory","volume":"5","author":"Armand","year":"2013","journal-title":"J. Rock Mech. Geotech. Eng."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"104","DOI":"10.2174\/1874328501307010104","article-title":"Distributed optical fiber sensing based on Rayleigh scattering","volume":"7","author":"Palmieri","year":"2013","journal-title":"Open Opt. J."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"1842","DOI":"10.1109\/50.633570","article-title":"Brillouin gain spectrum characterization in single-mode optical fibers","volume":"15","author":"Nikles","year":"1997","journal-title":"J. Light. Technol."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"115","DOI":"10.1016\/j.enggeo.2004.10.012","article-title":"Induced deformation during tunnel excavation: Evidence from geodetic monitoring","volume":"79","author":"Kontogianni","year":"2005","journal-title":"Eng. Geol."},{"key":"ref_6","first-page":"99","article-title":"A review of the use of terrestrial laser scanning application for change detection and deformation monitoring of structures","volume":"49","author":"Mukupa","year":"2017","journal-title":"Surv. Rev."},{"key":"ref_7","unstructured":"Van Gosliga, R., Lindenbergh, R., and Pfeifer, N. (2006). Deformation Analysis of a Bored Tunnel by Means of Terrestrial Laser Scanning, International Archives of Photogrammetry, Remote Sensing and Spatial Information Systems. Volume XXXVI, Part 5."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"83","DOI":"10.1007\/s12145-014-0152-8","article-title":"Photogrammetric techniques for monitoring tunnel deformation","volume":"7","author":"Scaioni","year":"2014","journal-title":"Earth Sci. Inform."},{"key":"ref_9","doi-asserted-by":"crossref","unstructured":"Bernardo-Sanchez, A., and Arlandi-Rodriguez, M. (2014, January 27\u201329). Procedure for obtaining and analyzing the diametric deformation of a tunnel by means of tape extensometer convergence measures. Proceedings of the ISRM Regional Symposium-EUROCK 2014, Vigo, Spain.","DOI":"10.1201\/b16955-162"},{"key":"ref_10","doi-asserted-by":"crossref","unstructured":"Hoult, N., and Soga, K. (2014). Sensing solutions for assessing and monitoring tunnels. Sensor Technologies for Civil Infrastructures, Elsevier.","DOI":"10.1533\/9781782422433.2.309"},{"key":"ref_11","unstructured":"Bradley, B., and Prado Garcia, R. (2015). The use of Shape Accel Array for monitoring utilities during urban tunnel drives. Crossrail Project: Infrastructure Design and Construction, ICE Publishing."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"180","DOI":"10.1016\/j.isprsjprs.2018.07.010","article-title":"Tunnel inspection using photogrammetric techniques and image processing: A review","volume":"144","author":"Attard","year":"2018","journal-title":"ISPRS J. Photogramm. Remote. Sens."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1007\/s13320-013-0136-1","article-title":"Study of optical fibers strain-temperature sensitivities using hybrid Brillouin-Rayleigh System","volume":"4","author":"Kishida","year":"2014","journal-title":"Photonic Sens."},{"key":"ref_14","unstructured":"Monsberger, C.M., Lienhart, W., Kluckner, A., Wagner, L., and Schubert, W. (2018, January 10\u201313). Continuous strain measurements in a shotcrete tunnel lining using distributed fibre optic sensing. Proceedings of the 9th European Workshop on Structural Health Monitoring, Manchester, UK."},{"key":"ref_15","doi-asserted-by":"crossref","unstructured":"Bado, M.F., and Casas, J.R. (2021). A Review of Recent Distributed Optical Fiber Sensors Applications for Civil Engineering Structural Health Monitoring. Sensors, 21.","DOI":"10.3390\/s21051818"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"1428","DOI":"10.1109\/LPT.2003.818247","article-title":"In situ measurement of refractive index changes induced by gamma radiation in germanosilicate fibers","volume":"15","author":"Brichard","year":"2003","journal-title":"IEEE Photonics Technol. Lett."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"2015","DOI":"10.1109\/TNS.2012.2235464","article-title":"Radiation Effects on Silica-Based Optical Fibers: Recent Advances and Future Challenges","volume":"60","author":"Girard","year":"2013","journal-title":"IEEE Trans. Nucl. Sci."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"111","DOI":"10.1109\/TNS.2017.2772333","article-title":"Steady-State Radiation-Induced Effects on the Performances of BOTDA and BOTDR Optical Fiber Sensors","volume":"65","author":"Morana","year":"2018","journal-title":"IEEE Trans. Nucl. Sci."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"21608","DOI":"10.1364\/OE.27.021608","article-title":"Coupled temperature and \u03b3-radiation effect on silica-based optical fiber strain sensors based on Rayleigh and Brillouin scatterings","volume":"27","author":"Piccolo","year":"2019","journal-title":"Opt. Express"},{"key":"ref_20","first-page":"62","article-title":"Optical fiber coatings","volume":"Volume 10272","author":"Paul","year":"1993","journal-title":"Fiber Optics Reliability and Testing: A Critical Review"},{"key":"ref_21","unstructured":"M\u00e9ndez, A., and Morse, T. (2007). Chapter 4\u2014Optical Fiber Coatings. Specialty Optical Fibers Handbook, Academic Press."},{"key":"ref_22","doi-asserted-by":"crossref","unstructured":"Piccolo, A., Delepine-Lesoille, S., Friedrich, E., Aziri, S., Lecieux, Y., and Leduc, D. (2020). Mechanical Properties of Optical Fiber Strain Sensing Cables under \u03b3-Ray Irradiation and Large Strain Influence. Sensors, 20.","DOI":"10.3390\/s20030696"},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"1323","DOI":"10.1049\/el:19880899","article-title":"Hydrogen permeation in optical fibres with hermetic carbon coatings","volume":"24","author":"Lemaire","year":"1988","journal-title":"Electron. Lett."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"2432","DOI":"10.1109\/JLT.2014.2388453","article-title":"Effects of Radiation and Hydrogen-Loading on the Performances of Raman-Distributed Temperature Fiber Sensors","volume":"33","author":"Cangialosi","year":"2015","journal-title":"J. Light. Technol."},{"key":"ref_25","unstructured":"BIPM, IEC, IFCC, ILAC, ISO, IUPAC, IUPAP, and OIML (2022, November 27). Evaluation of Measurement Data\u2014Guide to the Expression of Uncertainty in Measurement. Joint Committee for Guides in Metrology, JCGM 100:2008. Available online: https:\/\/www.bipm.org\/en\/committees\/jc\/jcgm\/publications."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"97","DOI":"10.1007\/s00603-015-0737-7","article-title":"Analysis of Long-Term Anisotropic Convergence in Drifts Excavated in Callovo-Oxfordian","volume":"49","author":"Sulem","year":"2016","journal-title":"Rock Mech. Rock Eng."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"045008","DOI":"10.1088\/1361-665X\/ab04cc","article-title":"Non-invasive tunnel convergence measurement based on distributed optical fiber strain sensing","volume":"28","author":"Piccolo","year":"2019","journal-title":"Smart Mater. Struct."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"025004","DOI":"10.1088\/1361-665X\/ac40dc","article-title":"In-situ monitoring of micro-tunnel geometry change based on distributed optical fiber strain sensing","volume":"31","author":"Piccolo","year":"2021","journal-title":"Smart Mater. Struct."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/23\/1\/398\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T01:56:19Z","timestamp":1760147779000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/23\/1\/398"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2022,12,30]]},"references-count":28,"journal-issue":{"issue":"1","published-online":{"date-parts":[[2023,1]]}},"alternative-id":["s23010398"],"URL":"https:\/\/doi.org\/10.3390\/s23010398","relation":{},"ISSN":["1424-8220"],"issn-type":[{"type":"electronic","value":"1424-8220"}],"subject":[],"published":{"date-parts":[[2022,12,30]]}}}