Orano - Annual Activity Report 2024 227 SUSTAINABILITY STATEMENT 4 Social and societal information In its Commitment roadmap, the group has set itself a target by 2030 of avoiding significant nuclear and radiological events of level 2 or higher according to the INES scale. The group also uses an internal scale called ASSESS (Advanced Severity Scale for Events and Soft Signals). It takes into account industrial safety events. The objective is to have elements of comparison and thus to better judge their seriousness. Based on the principles of the ARIA scale, the INES scale, and adapted to the group’s industrial and mining operations, it is graduated from 0 (weak signal) to 5 (serious accident). As part of the 2024-2026 HSE policy, the group has set itself no ASSESS level 3 or higher event. In the fields of nuclear safety and industrial security, the low values of the prevention rates observed for several years with regard to the stated objective (TPE of 0.05 for an objective to 0.1 for safety) led to change the measurement of this performance by taking into account the differences considered as weak signals. These new indicators, tested in 2023 and included in the HSE policy for 2024 to 2026, should make it possible to strengthen performance management in this area. These internal indicators are based on ratios: ● the Safety Prevention Rate (SPR) is the ratio of (1+ number of INES ≥ 1) to (number of INES 0 + number of events); and ● the Industrial Risks Prevention Rate (IRPR) is the ratio of (1 + number of ASSESS ≥ 2) to (number of ASSESS 0 + number of ASSESS 1). These indicators and the associated trend analyses make it possible to monitor our ability to prevent the most significant events (INES ≥ 1 and ASSESS ≥2) and at the same time to identify and report weak signals. The significant increase in one or both indicators should lead to the implementation of additional progress actions to improve the trend (field visits dedicated to a theme, strengthening of the action plan around organizational and human factors, etc.). Orano has also voluntarily set targets for the SPR and the IRPR of respectively less than 1 and 2.5 in 2024. The progress of these results is presented to the Executive Committee on a monthly basis. Nuclear and industrial safety results In 2024, Orano did not experience any significant events classified as level 2 or higher on the INES scale. The significant decrease in the number of INES level 1 events observed in 2024, despite the increase in the number of INES 0 events as well as an SPR of 0.5 illustrate a year with good results in terms of safety prevention. In terms of industrial safety, the results are more mixed with an IRPR higher than the target and the occurrence of several ASSESS 2 events and one ASSESS 3 event, mainly related to accidental spills. These spills were the subject of clean-up actions and had no lasting impact on the environment. INES SCALE Accidents with local consequences Accidents with widespread consequences Serious accident Major accident 7 6 5 4 Anomaly Incident Serious incident 3 2 1 Not important from a safety standpoint 0 ACCIDENT INCIDENT
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