Optical properties in fibers during irradiation in a fission reactor

Tatsuo Shikama, T. Kakuta, M. Narui, T. Sagawa, H. Kayano

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)


The effects of irradiation on the performance of optical fibers with silica core were examined during irradiation in a fission reactor, JMTR. The fibers performed well in terms of their radiation characteristics up to the fast neutron fluence of 1.06 × 1020 n/cm2 and the gamma ray dose rate of 4.3 × 109 Gy at 460 K. Three kinds of optical radiation induced by the reactor irradiation were observed during irradiation. Origins of these optical radiations were studied. Broad optical radiations centered at 0.45 and 0.73 μm are thought to be Cherenkov radiation. The sharp optical radiation at 1.27 μm was thought to be generated in the silica core by the gamma-ray irradiations in the reactor.

Original languageEnglish
Pages (from-to)324-327
Number of pages4
JournalJournal of Nuclear Materials
Publication statusPublished - 1995 Jan 1

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Materials Science(all)
  • Nuclear Energy and Engineering


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