Transcription of CHAPTER 3 RADIATION PROTECTION
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CHAPTER 3 RADIATION PROTECTION
RSSC RADIATION PROTECTION 07/11 3-1 CHAPTER 3 RADIATION PROTECTION PAGE I. External RADIATION PROTECTION .. 3-3 A. Time .. 3-3 B. distance .. 3-3 1. The Inverse Square Law .. 3-3 2. Gamma Constants .. 3-4 3. Gamma Exposure Rate Formula .. 3-5 C. Shielding .. 3-6 1. Alpha and Beta RADIATION .. 3-6 2. X- and Gamma RADIATION .. 3-6 3. Half Value Layer .. 3-8 D. External Exposure Personnel Monitoring .. 3-9 1. Types of Personnel Dosimeters .. 3-9 2. Use of Personnel Dosimeters .. 3-11 3. Maximum Permissible Exposure Limits .. 3-14 E. Posting and Labeling of Radioactive Materials .. 3-15 1.
distance of one meter have been measured. These gamma constants can be used to determine 1) the expected exposure rate at a given distance (using the inverse square law) for a known quantity of a radionuclide, or 2) the activity of a radionuclide from a measured exposure rate. Gamma constants ( ) for selected radionuclides can be found on page 43.
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