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[en] The transmission of information via optical fiber became more attractive due its advantageous characteristics in relation to the radio waves or metallic wires. Beside the applications in data-communication, the optic fibers have presented great benefit in the area of sensors and industrial controls, including the nuclear area. However, a major problem in the application of optical fibers in nuclear environments is the presence of ionizing radiation. When optical fibers are exposed to radiation field, color center are formed in the optical core or cladding and its can degrade the transmission. In this work it is presented the theoretical basis for color centers formation in optical fibers and the results attained in an exploratory experiment to measure the attenuation in a multimode optic fiber using a gamma ray source. (author)
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Associacao Brasileira de Energia Nuclear, Rio de Janeiro, RJ (Brazil); [vp.]; ISBN 978-85-99141-02-1; 
; 2007; [7 p.]; INAC 2007: International nuclear atlantic conference. Nuclear energy and energetic challenges for 21st. century. 15. Brazilian national meeting on reactor physics and thermal hydraulics; Santos, SP (Brazil); 30 Sep - 5 Oct 2007; 8. Brazilian national meeting on nuclear applications; Santos, SP (Brazil); 30 Sep - 5 Oct 2007; Available from the Library of the Brazilian National Nuclear Energy Commission, Rio de Janeiro, in electronic form; 5 refs., 4 figs., tabs. Code: E13915.pdf
; 2007; [7 p.]; INAC 2007: International nuclear atlantic conference. Nuclear energy and energetic challenges for 21st. century. 15. Brazilian national meeting on reactor physics and thermal hydraulics; Santos, SP (Brazil); 30 Sep - 5 Oct 2007; 8. Brazilian national meeting on nuclear applications; Santos, SP (Brazil); 30 Sep - 5 Oct 2007; Available from the Library of the Brazilian National Nuclear Energy Commission, Rio de Janeiro, in electronic form; 5 refs., 4 figs., tabs. Code: E13915.pdf