RADD 2501 MPD and Barriers PowerPoint

RADD 2501 MPD and Barriers PowerPoint - Protection...

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Unformatted text preview: Protection Radiation Protection Protection BENEFITS VS. ADVERSE EFFECTS Protection EFFECTS STOCHASTIC: Random effects non threshold, linear dose response relationship e.g..: latent cancer, genetic effects NON-STOCHASTIC threshold dose response relationship e.g..: cataracts sterility Protection MAXIMUM PERMISSIBLE DOSE maximum radiation dose that would not be expected to produce significant radiation effect (as far as we know) Doses below the MPD should not result in either somatic or genetic response MPDs specified for occupational exposure only Known as dose limiting recommendations Protection MAXIMUM PERMISSIBLE DOSE Based on a linear, non-threshold dose response relationship See A All unnecessary exposure should be avoided Protection WHOLE BODY OCCUPATIONAL EXPOSURE 5 REM/year (5 rem = 5000 mrem) (average: less than 100 mRem) Protection WHOLE BODY OCCUPATIONAL EXPOSURE Pregnant radiation workers: 0.5 rem/gestation period Never a sufficient reason to terminate employment Protection WHOLE BODY NON- OCCUPATIONAL EXPOSURE 0.1 REM/year used in the design of protective barriers (uncontrolled areas) Protection PARTIAL BODY OCCUPATIONAL EXPOSURE Lens of the eye: 15 REM/year Skin and any extremity: 50 REM/year application: fluoro and nuclear medicine measured by special ring badges or bracelets Protection CUMULATIVE MPD (old formula) over the life of the radiation worker determined by: 5x(n-18)...
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RADD 2501 MPD and Barriers PowerPoint - Protection...

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