Assessment of the requirements for the thermoluminescent dosimeters (LTD) during LHC Operation

The CERN TLD (Thermo-Luminescent Dosimetry) service of the radiation protection group provides since many years TLD monitoring of the environmental doses and of the doses around the accelerators and in the experimental areas. TLDs will be installed in the LHC experimental areas to measure the absorbed doses during LHC operation in specific locations close to technical equipment. The total amount of TLDs required by the experiments is presently estimated at about 1600. This note describes the material presently available in the TLD laboratory and the procedure employed for the TLD reading, the additional requirements (in terms of manpower and material) that will be demanded to extend TLD monitoring to the LHC experimental areas, and compares the option of maintaining the service at CERN or outsourcing it.