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DEVELOPMENT OF THE CENTRIFUGALLY TENSIONED METASTABLE FLUID DETECTOR FOR IN-AIR RADON AND ACTINIDE ALPHA DETECTION

thesis
posted on 21.06.2022, 14:16 by Mitchell HemesathMitchell Hemesath
This thesis pertains to two R&D objectives associated with deploying TMFD sensor technology for meeting AARST-NRPP metrics for Radon (Rn) in-air detection, as well as for monitoring of ultra-trace actinides in air, amidst other Rn-progeny alpha emitting radionuclides. A challenge has persisted over the past 40+ years for detecting trace actinides in air amidst a 100-1000x higher Rn-progeny background. This thesis had a primary aim for addressing this challenge, and developing and assessing for a novel technology solution. Both objectives were successfully met. Methods, designs, and experimental effects of apparatus are discussed for successful Rn and progeny detection for 1-100 pCi/L concentration levels, as well as for Rn-progeny “blind” spectroscopic detection of 10-12 μCi/cc concentrations of actinides (Pu/U/Am) in air. The resulting CTMFD based technology was compared with the state-of-art “Alpha Sentry” CAM system and found to offer superior performance in multiple categories, and ~18x improvement in time to detect (e.g. at 0.02 DAC in 3 hrs vs ~70 hrs for state-of-art) for actinides while also remaining ~100% blind to ~102x higher Rn-progeny background; and, with 1 keV energy resolution vs ~300-400 keV for Alpha Sentry.

Funding

Purdue University's Ross Fellowship

DOE AU-Nuclear Safety R&D Program

History

Degree Type

Master of Science in Nuclear Engineering

Department

Nuclear Engineering

Campus location

West Lafayette

Advisor/Supervisor/Committee Chair

Rusi Taleyarkhan

Additional Committee Member 2

Jason Harris

Additional Committee Member 3

Robert Bean

Additional Committee Member 4

Shripad Revankar