Electrical conductivity of single crystal α-alumina under neutron and γ-ray irradiation

Tatsuo Shikama, Minoru Narui, Akira Ochiai, Hideo Kayano, Yasuichi Endo

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

Recent advances in nuclear-fusion-reactor development renewed interest in the well-known phenomenon called radiation-induced conductivity (RIC). RIC involves an increase of electrical conductivity of ceramic insulators under exposure to ionizing irradiation. We tried to measure RIC of single crystal α-alumina in the fission reactor JMTR. The α-alumina was encapsulated in a well electrically insulated casing and was exposed to fast neutron irradiation up to 3.4×1017 n/m2·s and to γ-ray irradiation up to 1.5×104 Gy/s. The measured RIC was 0.6 to 1.5×10-5 (ohm m)-1 at the maximum exposure rate. Temperature dependence of the RIC was not observed in the present experiment, and the RIC was found to depend on the 0.75th power of reactor power.

Original languageEnglish
Title of host publicationASTM Special Technical Publication
PublisherPubl by ASTM
Pages776-784
Number of pages9
Edition1125
ISBN (Print)080311477X
Publication statusPublished - 1992 Dec 1
Event15th International Symposium on Effects of Radiation on Materials - Nashville, TN, USA
Duration: 1990 Jun 191990 Jun 21

Publication series

NameASTM Special Technical Publication
Number1125
ISSN (Print)0066-0558

Other

Other15th International Symposium on Effects of Radiation on Materials
CityNashville, TN, USA
Period90/6/1990/6/21

ASJC Scopus subject areas

  • Engineering(all)

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