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- W3135486598 abstract "10CFR835 stipulates that radiation protection instruments must be calibrated at least annually. Accordingly, calibration of dose rate instruments are reliant on well-known reference fields. The neutron-free-in-air facility (NFIA) located at TA36-0214 provides such a capability for neutron remmeters. One of the reference NFIA sources, 252Cf, must be replaced every 8-10 years due to its relatively short half-life (2.645 ± 0.008 y). In the past, each newly purchased 252Cf source has been calibrated at NIST using the Mn-bath technique prior to shipping to LANL. However, because of COVID-19 complications, the most recently acquired 252Cf source (FTC-CF-7167) has been stored at LANL pending approval to ship to NIST for calibration. Due to the considerable expense in transporting the source to and from NIST, this TBD was written to demonstrate that new sources can be accurately calibrated via intercomparison measurements with older NIST-calibrated 252Cf sources. It had been previously noted that such measurements yielded emission rates that agreed very well with the official rates established by NIST" @default.
- W3135486598 created "2021-03-15" @default.
- W3135486598 creator A5088708586 @default.
- W3135486598 date "2021-01-18" @default.
- W3135486598 modified "2023-09-26" @default.
- W3135486598 title "A Technical basis for in-house calibration of <sup>252</sup>Cf neutron source emission rates" @default.
- W3135486598 doi "https://doi.org/10.2172/1768422" @default.
- W3135486598 hasPublicationYear "2021" @default.
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