CRPA-ACRP Bulletin

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President’s Message, May 2025

CRPA president Corie Houldsworth looks back at CRPA’s past and at the history of radiation protection in Canada and beyond. She is also looking forward to what the future holds. She talks about how this ties in with this year’s conference theme: “Forging the Future.”

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Health Physics Corner, May 2025

In this instalment of the Health Physics (HP) Corner, Jeff is checking the activity estimate for monazite ore, which nominally contains 10 MBq of Th-232. If the ambient dose equivalent gamma constant for Th-232 is essentially zero, why is the measurement at 10 cm more than 1,000 times as high as you might expect?

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Due South, May 2025

Scott Nichelson, from Texas, is CRPA’s self-proclaimed southernmost member. He is also a member of the Health Physics Society (HPS) and regularly provides updates on HPS events that might be of interest to CRPA Bulletin readers.