Page 284 - Radiation Safety
P. 284

RADIATION PROTECTION SYSTEMS

















                                  1. Justification                               2. Optimization                                     3. Dos Limit







                                      Necessity                                      ALARA                                          Dose limit allowed

                                                             necessary               (As Low As                                     to reduce

                                                                                                                                    stochastic effect
                                               Not                                   Reasonably

                                               necessary                             Achievable)



                                  No exposure                                        - Dose received

                                                                                     must lower than

                                                                                     the dose causing

                                                                                     effective biological

                                                                                     effect
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