CPB Ljubljana 2018 course book

Shielding Calculations, Principles

Shielding Calculations: does your facility fulfil the radiation protection requirements (limits)?

W x f

x f

x T

x T

< limit

dist

occup

patient

trans

• f dist = inverse square law (distance factor) • f occup = occupancy factor • T patient = transmission through the patient • T trans

= transmission factor through the wall or shielding material

• limit = requirement for the specific point per time period (w, m, y; e.g. 1 mSv/year )