Speaker
Stefan Roesler
(CERN)
Description
Operation in 2010 has caused the first components to become radioactive. An overview of the present residual dose rates around the machine is given and compared to results of activation studies. 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 reflects 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 4.5TeV with up to 100 MJ stored beam energy. 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.
