Modeling and Measurements for Mitigating Interface from Skyshine
Skyshine, the radiation scattered in the air above a high-activity gamma-ray source, can produce interference with radiation portal monitor (RPM) systems at distances up to even many hundred meters. Pacific Northwest National Laboratory (PNNL) has been engaged in a campaign of measurements, design work and modeling that explore methods of mitigating the effects of skyshine on outdoor measurements with sensitive instruments. An overview of our work with shielding of skyshine is being reported by us in another paper at this conference. This paper will concentrate on two topics: measurements and modeling with Monte Carlo transport calculations to characterize skyshine from an iridium-192 source, and testing of a prototype louver system, designed and fabricated at PNNL, as a shielding approach to limit the impact of skyshine interference on RPM systems.
- Research Organization:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 977333
- Report Number(s):
- PNNL-SA-69151; 400904120; TRN: US1004135
- Resource Relation:
- Conference: IEEE Nuclear Science Symposium Conference Record (NSS/MIC 2009), October 24-November 1, 2009, Orlando, Florida, 976 - 980
- Country of Publication:
- United States
- Language:
- English
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