Radiation Protection: How (radio)active are we going to be?

Operation in 2010 has caused the first components to become radioactive. An overview of the present residual dose rates around the machine is given. It shows that measurable activation is presently limited to a few components only, such as collimators and absorbers. The procedures to be applied for maintenance and repair work in the tunnel and/or workshops reflect the low radiological risk. However, the comparison to calculated residual dose rates also confirms results of studies and adds confidence in predictions for operation in 2011/12. The latter are given assuming operation at 4 TeV with up to 53% of nominal beam intensity. At the same time, predictions by pure simulation have limitations which are outlined. In order to overcome them, assessments combined with measurements are planned and will be summarized. Finally, the implications of the envisaged operational scenarios for 2011/12 on maintenance and consolidation work as well as on the validity of compensatory measures are detailed.