Swelling of spinel after low-dose neutron irradiation

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Swelling was determined in samples of single-crystal MgAl/sub 2/O/sub 4/ spinel, irradiated to doses as high as 8 x 10/sup 22/ n/m/sup 2/ (E > 0.1 MeV) at approx. =50/sup 0/C in the Omega West Reactor. Swelling effectively saturated at approx. =2 x 10/sup 22/ n/m/sup 2/ which corresponds to a damage level of only approx. =2 x 10/sup -3/ dpa. In addition subsequent measurements after irradiation have revealed that the samples continued swelling for several weeks. These results imply that irradiation defects begin to interact by recombination and aggregation at low damage levels in this material at 50/sup 0/C ... continued below

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Pages: 21

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Coghlan, W.A.; Clinard, F.W. Jr.; Itoh, N. & Greenwood, L.R. January 1, 1986.

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Description

Swelling was determined in samples of single-crystal MgAl/sub 2/O/sub 4/ spinel, irradiated to doses as high as 8 x 10/sup 22/ n/m/sup 2/ (E > 0.1 MeV) at approx. =50/sup 0/C in the Omega West Reactor. Swelling effectively saturated at approx. =2 x 10/sup 22/ n/m/sup 2/ which corresponds to a damage level of only approx. =2 x 10/sup -3/ dpa. In addition subsequent measurements after irradiation have revealed that the samples continued swelling for several weeks. These results imply that irradiation defects begin to interact by recombination and aggregation at low damage levels in this material at 50/sup 0/C and perhaps continue to cluster at room temperature after irradiation. Rate equations have been employed to determine defect concentrations at saturation. Results to date show that the observed swelling is consistent with the number of surviving defects if swelling per Frenkel defect pair is taken to be one atomic volume.

Physical Description

Pages: 21

Notes

NTIS, PC A02/MF A01.

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  • 2. international conference on fusion reactor materials (ICFRM-2), Chicago, IL, USA, 13 Apr 1986

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  • Other: DE86008753
  • Report No.: LA-UR-86-1048
  • Report No.: CONF-860421-8
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 6067623
  • Archival Resource Key: ark:/67531/metadc1104742

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • January 1, 1986

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  • Feb. 22, 2018, 7:45 p.m.

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  • March 23, 2018, 6:21 p.m.

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Coghlan, W.A.; Clinard, F.W. Jr.; Itoh, N. & Greenwood, L.R. Swelling of spinel after low-dose neutron irradiation, article, January 1, 1986; United States. (digital.library.unt.edu/ark:/67531/metadc1104742/: accessed May 25, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.