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.
1. The Inverse Square Law - Point sources of x- and gamma radiation follow the inverse square law, which states that the intensity of the radiation (I) decreases in proportion to the inverse of the distance from the source (d) squared: 2 1 d Iv This can be rewritten : 2 1 d I K where K is a constant of unknown value. So, for an intensity I 1 at ...
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