North Area consolidation project Safety Diagnostic Why? When? How? EN Safety Office EDMS # 1788836

Context No safety file available for the existing North Area Facility A consolidation project is starting Input based on safety feedback (R.E.M.) is required = SAFETY DIAGNOSTIC Safety file v_2.0 facility consolidated R.E.M part Safety file v_2.0 facility consolidated Safety file v_1.1 facility upgrade Diagnostic R.E.M part Safety file v_1.0 facility consolidated Diagnostic R.E.M part Diagnostic Safety file v_1.0 new facility R.E.M part Existing facility Diagnostic North Area EDMS # 1788836

Coupling with the project lifetime Perform a diagnostic in line with the project life cycle: Focused on: Safety aspect; Environmental aspect Based on the experience, the data recorded and the history of the facility

Diagnostic process : 3 steps Interview with each system/process owner based on 3 criteria: The Probability (P) Accident /incident history Inspections reports analysis Events occurred The potential Severity (S) of the system For the persons For the environment For the facility The current Level of control (L) Rating of the system on: Safety aspects (OHS, reliability) Environmental impact 3) Recommendations for the Conceptual Design Report SCORE = P x S x L

Rating Safety aspects : Probability of an event related with this system/process (based on accident declaration in the north area on this system/process) : 1: No event during the last 5 years 3: On average 1 event/ years during the last 5 years 5: More than 5 events / years during the last 5 years Reasonable maximum Severity in case of an event related with this system/process: 1: Slight injury (1st degree burn, contusion…) – Hundreds Swiss francs of material damages 5: Injury with days off (broken legs, 2nd degree burn…) – Thousands Swiss francs of damages – Lost operation time (in hours) 10: Injury with work disability or fatality (electrocution, fall from height…) – Hundred thousands Swiss francs of damages – Lost operation time (in days) Current level of control related to human exposure on this system/process: 1: A safety management system is continuously improving the OHS level (Safety culture shared by workers, systematic risk assessment, systematic safety feedback; FMEA (Failure Mode and Effects Analysis) for each systems…)) 3: A safety management system is in place but still have to be improved (Prevention plan partially in place, no systematic risk assessment is performed, several level of sub-contractors; FMEA not performed…) 5: Non-compliant with the applicable safety rules (Workers not trained properly, procedures are not up to date…) Safety score = P x S x L

Rating Environmental Impact : Probability of an event related with this system/process (based on accident declaration) : 1: No event during the last 5 years in the north area on this system/process 3: On average 1 event/ years during the last 5 years in the north area on this system/process 5: More than 5 events / years during the last 5 years in the north area on this system/process Reasonable maximum severity in case of an event related with this system/process: 1: Minor environmental impact (Increase of electrical consumption, mistake in sorting common waste…) 5: Major environmental impact ( < 10 liters of pollution released in the air, water, soil; mistake in sorting chemical waste…) 10: Serious environmental impact( > 10 liters of pollution released in the air, water, soil; abnormal energy consumption…) Current level of control related to human exposure on this system/process: 1: A environmental management system is continuously improving the Environmental level (Safety culture shared by workers, systematic waste segregation, emergency procedures known by everyone, systematic environmental impact study…) 3: A safety management system is in place but still have to be improved (Prevention plan partially in place, no systematic risk assessment is performed, several level of sub-contractors…) 5: Non-compliant with the applicable safety rules (Workers not trained properly, procedures are not up to date…) Env score = P x S x L

Sum up : Diagnostic based on the Records, Experience and Monitoring (REM) Help to understand the systems and the processes hazardousness Get an overview of the current situation Help to make recommendation and priorities Indicators allow to monitor the improvement Baseline for the safety management of the project Baseline for the safety file edition