Change of crackling noise in granite by thermal damage: Monitoring nuclear waste deposits

Kainan Xie, Xiang Jiang, Deyi Jiang, Yang Xiao, Shiwan Chen, Karin A. Dahmen, Eduard Vives, Antoni Planes, Ekhard K.H. Salje

Research output: Contribution to journalArticle

Abstract

High-sensitivity detection of acoustic emission from granite under uniaxial stress, together with advanced statistical analysis, shows changing collapse mechanisms when a sample is pre-heated. Massive microstructural changes occur at temperatures >500 °C while low-temperature (<<500 °C) treatment leads to scale invariant crackling noise with a mixed fix-point behavior. After treatment at higher temperatures, the collapse occurs via acoustic signals that show energy distributions with systematic deviations from the Gutenberg-Richter law while the Omori's and Båth's laws are not influenced by the thermal treatment. The granite samples stem from the site in the Beishan mountains where a new burial site for nuclear waste will be constructed. According to the 13th Five-Year Plan of the P.R. China, Chinese nuclear power installed capacity will reach 58 million kilowatts in 2020 and produce about 3200 tons of high-level nuclear waste every year. Monitoring the stability of the host rock at high temperatures becomes hence a key issue. Our analysis can serve as a blueprint for a protocol for continuous monitoring of the burial site.

Original languageEnglish (US)
Pages (from-to)1578-1584
Number of pages7
JournalAmerican Mineralogist
Volume104
Issue number11
DOIs
StatePublished - Nov 26 2019

Keywords

  • Crackling noise
  • acoustic emission
  • granite
  • thermal damage

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology

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  • Cite this

    Xie, K., Jiang, X., Jiang, D., Xiao, Y., Chen, S., Dahmen, K. A., Vives, E., Planes, A., & Salje, E. K. H. (2019). Change of crackling noise in granite by thermal damage: Monitoring nuclear waste deposits. American Mineralogist, 104(11), 1578-1584. https://doi.org/10.2138/am-2019-7058