NCRP Report #147 - Radiation Shielding for Medical Instalations

Surveys of X-ray Shielding• After installation of shielding, should assureadequacy of installed barriers. (That is, “Are theythick enough?”)– Visual linspection i before walls are closed up.– Transmission measurements through barriers• Generally ypoint measurements that may not be typical of wholebarrier.• Sources:– Gamma ray source (but don’t violate any licensing issues!)– X-ray source (but don’t burn up the x-ray tube)– Difficulties may arise if evaluator uses differentassumptions from designer.43