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SUMMARY:Investigating Local Defect Structures in Nuclear Waste Form Materi
 als
DTSTART;VALUE=DATE-TIME:20171031T041500Z
DTEND;VALUE=DATE-TIME:20171031T044500Z
DTSTAMP;VALUE=DATE-TIME:20260416T053416Z
UID:indico-contribution-1145@events01.synchrotron.org.au
DESCRIPTION:Speakers: Maik Lang (University of Tennessee)\nFor the past 30
  years\, the development of durable materials for radionuclide immobilizat
 ion has been central to efforts to dispose of wastes generated by the nucl
 ear fuel cycle. There still exist\, however\, large gaps in the understand
 ing of fundamental modes of waste form degradation under repository condit
 ions. Comprehensive evaluation of waste form performance\, including resis
 tance to corrosion\, requires detailed knowledge of the atomic-scale effec
 ts of long-term self-irradiation. We have recently shown that pair distrib
 ution function (PDF) analysis of neutron total scattering measurements can
  be applied to uniquely characterize radiation effects in a wide range of 
 waste form materials\, including fluorite-derivative pyrochlores\, actinid
 e oxides\, and glasses. These measurements allow a detailed analysis of bo
 th cation and anion defect behavior\, and short range order and disorder\,
  which is particularly important for the investigation of aperiodic glasse
 s. Recent results have shown complex disordering in pyrochlores\, and oxyg
 en defect clustering in actinide oxides.\n\nhttps://events01.synchrotron.o
 rg.au/event/51/contributions/1145/
LOCATION:
URL:https://events01.synchrotron.org.au/event/51/contributions/1145/
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