Characterization of radiation hardened fibers in a research grade nuclear reactor

G. Berkovic, S. Zilberman, E. Shafir, Y. London, M. Dadon, M. Alefe, K. Ben Meir, A. Krakovich, T. Makmal

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Scopus citations


In order to test and compare the suitability of various radiation hardened optical fibers, we have established a test site in the 5MW research grade open pool reactor located at Soreq Nuclear Research Center, Israel. Several commercial fiber samples were coiled inside a specially designed apparatus which was lowered into the reactor core. The input and output legs of each fiber coil were prepared sufficiently long to extend outside the reactor pool, and were attached to a source (input) and detector (output). The transmission/attenuation could then be measured during, and in between, operations of the reactor. Since the reactor does not operate continuously, we were able to monitor in real time both transmission changes under very high radiation rates (approx. 0.5 MGy/hr) and doses (about 20 MGy) of gamma rays and neutrons, as well as recovery processes after each reactor shut down. Results are presented comparing the RIA and recovery kinetics of different commercial radiation hardened fibers under identical exposure/relaxation cycles. This study also examined effects on fibers with different coating materials and a fiber with inscribed Bragg gratings.

Original languageEnglish
Title of host publicationMicro-structured and Specialty Optical Fibres VII
EditorsKyriacos Kalli, Alexis Mendez, Pavel Peterka
ISBN (Electronic)9781510643802
StatePublished - 2021
Externally publishedYes
EventMicro-structured and Specialty Optical Fibres VII 2021 - Virtual, Online, Czech Republic
Duration: 19 Apr 202123 Apr 2021

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferenceMicro-structured and Specialty Optical Fibres VII 2021
Country/TerritoryCzech Republic
CityVirtual, Online

Bibliographical note

Publisher Copyright:
© 2021 SPIE.


  • Ionizing radiation
  • Radiation Hardened Fibers
  • Radiation Induced Attenuation


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