THE MEASUREMENT OF ENVIRONMENTAL RADIATION EXPOSURE AROUND THE LINAC RADIOTHERAPY BUNKER

Radiotherapy is cancer therapy using radiation. One of the tools used for radiotherapy Linac. Using Linac also can have a detrimental effect on radiation workers, patients, and public. The reaction cause activation around room to become radioactive. Therefore, protection needed. This research aimed measure environmental exposure as effort bunker. uses quantitative method by collecting data directly area bunker, with distance ± 30 cm from bunker wall, STEP OD-02 Detector. average operation 2000 hours/year, while safe dose limit 1/2 Limit Nuclear Power Monitoring Agency. Based measurements exposure, there are eight areas classified four other regions experiencing leakage, including Doors difference 0.078 Sv/hour; West Field (0.074 Sv/hour); TPS Room (0.302 Meeting Rooms (0.199 Sv/hour), but still within dose. safe.