Page 730 - Radiation Safety
P. 730

ENVIRONMENTAL MONITORING




                                    MONITORING PARAMETERS


                                    3.       Surface contamination, consider contaminate if


                                                 • Alpha emitter > 0.04 Bq/cm                               2


                                                 • Others > 0.4 Bq/cm                       2





                                    4. Airborne contamination, must be monitor in dusty working

                                            environment, dust sampled and analyzed for gross alpha and

                                            gross beta activity for determination of U-238 and Th-232. It is

                                            considered contaminate if


                                                 • Uranium > 0.01 Bq/m                          3


                                                 • Thorium > 0.001 Bq/m                           3
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