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UNESE Phase 2: Injection and measurement of gaseous tracers at U-12p Tunnel

Technical Report ·
DOI:https://doi.org/10.2172/1983357· OSTI ID:1983357
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  1. Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
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In June 2018 radioactive (37Ar and 127Xe) and stable (SF6) tracers were injected into the chimney of the Disko Elm underground nuclear explosion, located in the U-12p tunnel complex. After the injection sampling was performed from locations within the tunnel, a borehole drilled from the surface, and from the surface of the mesa. Additionally, the 127Xe activity within the chimney was continuously monitored for two months after the injection. While none of the injected radiotracers were detected in the monitoring borehole, elevated levels of 39Ar (an activation product produced by underground nuclear explosions) were detected and quantified in each sample.
Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
DOE Contract Number:
AC05-76RL01830
OSTI ID:
1983357
Report Number(s):
PNNL--30202
Country of Publication:
United States
Language:
English

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Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS