In line with industry standards, we measure and report process safety incidents according to significance, with Tier 1 as the most significant category.
The number of Tier 1 and 2 operational process safety events stagnated at 102 in 2021, compared with 103 in 2020. Of these, 38 were Tier 1 and 64 were Tier 2 events in 2021. For comparison, there were 34 Tier 1 and 69 Tier 2 operational process safety events in 2020.
Process safety events related to sabotage and theft in Nigeria are recorded separately. In Nigeria, there were seven Tier 1 events in 2021, compared with one in 2020.
Read more about process safety at www.shell.com/process-safety.