LS3 Safety Spotlight: coordinating activities at CERN: monitoring activities – a key step

At CERN, the Large Science 3 (LS3) site is emphasizing the importance of coordinating activities during the Long Shutdown 3. A key aspect of this coordination is monitoring the ground activities, a measure that not only fulfills regulatory requirements but also ensures that work is being carried out properly and that safety measures are being implemented. Failure to conduct adequate monitoring could be considered a breach of coordination obligations.

The frequency of site visits is determined by factors such as the duration of work, level of risk, working environment, concurrent activities, and the number of operating entities. It is recommended to conduct a site visit at the beginning of the activity, during critical phases, when the team changes, or in response to safety incidents or specific requests. Unannounced visits can also be used to observe actual working conditions and demonstrate CERN's commitment to safety.

During a site visit, inspectors check that the work area is safe, required signage is in place, the established working procedure is followed, there are no unplanned concurrent activities, and the equipment being used appears to be in good working order. After each visit, a written record must be produced and an email sent to the supervisor of the operating entities and other WSSs concerned.

Any deficiencies related to working procedures and safety requirements must be assessed, corrected within a reasonable time frame, and analyzed to determine the causes. In the case of unplanned concurrent activities, risks must be reassessed, and activities must be suspended until appropriate measures are put in place. If there is a serious and imminent danger, the activity must be stopped immediately, stakeholders informed promptly, and the situation confirmed in writing.