PSI - Issue 48

Ramdane Bouzerara et al. / Procedia Structural Integrity 48 (2023) 4–11 Bouzerara et al/ Structural Integrity Procedia 00 (2023) 000 – 000

8

5

Table 7: Presentation of the cumulative accidents of the different areas A rea Number of accidents %

% cumul

Refining

11

32% 24% 18% 18%

32% 56% 74% 91%

Casting machine

8 6 6 3

Fluid

Maintenance

Refractory

9%

100%

Sum

34

100%

Generally, in order to carry out an action plan that meets the expectations and objectives of the company, we will have to determine the priority actions to be carried out in the unit and then engage in a continuous improvement process. The best way is the application of the Pareto law (20/80). This way you can determine the most affected areas. The accumulation of accidents is presented in table 7 and graphically in figure 3. We note that the areas most affected by work accidents are the refining area, the casting machine area and the fluid area. These three areas represent almost 80% of the accidents in the unit. Therefore, these three areas deserve special attention and in-depth analysis in order to define priority preventive and corrective actions to be taken.

Figure 3: Determination of the (20/80) %.

B.3. Study of the areas concerned by the priority actions: Here, it should be noted that this does not mean that other areas are not taken into account. Daily actions must always be carried out. However, special attention is directed toward the areas most affected by work accidents. Thus, our risk assessment consists of a thorough inspection of the workplace in order to identify, among other things, the elements, situations, and processes that can cause harm, especially to people. Once the risk has been identified, we proceed to the analysis and evaluation of the probability and severity of the risk. The next step is to determine what measures should be taken to prevent harm from occurring. The results of the evaluation obtained are recorded in tables 9 and 10, based on the table 8. After analysis and evaluation of the risks, preventive and corrective actions to eliminate or mitigate the level of risk are presented in table 11. Table 8: Level of the risk control grid LC = Level of Risk Control Priority Observations LC > 40 Risks not controlled 1 1st elaboration of the HIRA LC=20.1 to 40 Risks not well controlled 2 1st elaboration of the HIRA NM < 20 Risks controlled 3 1st elaboration of the HIRA LC = 15.1 to 40 Risks not well controlled 2 1st revision of the HIRA P<15 Risks controlled 3 1st revision of the HIRA Table 9: Results of the NM evaluation Results Matrix N°1 * Matrix N°2 Probability ( P= (EL *LP) EL *LP 1 0.7 0.4 0.05 10 10 7 4 0.5