Design of a containment apparatus for synchrotron XAS measurements of radioactive fluid samples under high temperatures and pressures
The simple working principles and versatility of the hydrothermal diamond-anvil cell (HDAC) make it signifcantly useful for synchrotron x-ray studies of aqueous and fluid samples at high pressure-temperature (P-T) conditions. Yet, safety concerns need to be overcome in order to use the HDAC for synchrotron studies of aqueous radioactive samples at high temperatures and pressures. For accomplishment of such hydrothermal experiments of radioactive materials at synchrotron beamlines, the samples are required to be enclosed in a containment system employing three independent layers of airtight sealing at some synchrotron facilities while enabling access to the sample using several experimental probes, including incoming and outgoing x-rays. In this article, we report the design and implementation of a complete radiological safety enclosure system for an HDAC specialized for high P-T x-ray absorption spectroscopy (XAS) measurements of aqueous solutions containing the actinides at synchrotron beamlines. The enclosure system was successfully tested for XAS experiments using the HDAC with aqueous samples containing depleted uranium at temperatures ranging from 25 to 500 °C and pressures ranging from vapor pressure to 350 MPa.
- Research Organization:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division
- Grant/Contract Number:
- 89233218CNA000001; AC02-06CH11357; 20180007DR
- OSTI ID:
- 1565868
- Alternate ID(s):
- OSTI ID: 1567963
- Report Number(s):
- LA-UR-19-23291; TRN: US2000920
- Journal Information:
- Review of Scientific Instruments, Vol. 90, Issue 8; ISSN 0034-6748
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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