đ?‘đ?‘đ?‘đ?‘đ?‘đ?‘đ?‘đ?‘đ?‘đ?‘ đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’? đ?’?đ?’?đ?’?đ?’? đ?’?đ?’?đ?’?đ?’?đ?’?đ?’? đ?’‡đ?’‡đ?’‡đ?’‡đ?’‡đ?’‡đ?’‡đ?’‡đ?’‡đ?’‡đ?’‡đ?’‡đ?’‡đ?’‡đ?’‡đ?’‡ (đ?’•đ?’•đ?’•đ?’•đ?’•đ?’•đ?’•đ?’•đ?’•đ?’•đ?’•đ?’•đ?’•đ?’•đ?’•đ?’•đ?’•đ?’•đ?’•đ?’•) =
Societal risk is as follows:
đ?‘đ?‘đ?‘đ?‘đ?‘đ?‘đ?‘đ?‘đ?‘đ?‘ đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’? đ?’?đ?’?đ?’?đ?’? đ?’?đ?’?đ?’?đ?’?đ?’?đ?’? đ?’‡đ?’‡đ?’‡đ?’‡đ?’‡đ?’‡đ?’‡đ?’‡đ?’‡đ?’‡đ?’‡đ?’‡đ?’‡đ?’‡đ?’‡đ?’‡ (đ?’‘đ?’‘đ?’‘đ?’‘đ?’‘đ?’‘đ?’‘đ?’‘đ?’‘đ?’‘đ?’‘đ?’‘) =
đ?&#x;?đ?&#x;? Ă— đ?&#x;?đ?&#x;?đ?&#x;?đ?&#x;?−đ?&#x;”đ?&#x;” đ?’šđ?’šđ?’šđ?’šđ?’šđ?’šđ?’šđ?’š
đ?&#x;Žđ?&#x;Ž. đ?&#x;?đ?&#x;? Ă— (đ?‘ˇđ?‘ˇđ?‘ˇđ?‘ˇđ?‘ˇđ?‘ˇđ?&#x;?đ?&#x;? Ă— đ?‘ˇđ?‘ˇđ?‘ˇđ?‘ˇđ?‘ˇđ?‘ˇđ?&#x;?đ?&#x;? Ă— đ?‘ˇđ?‘ˇđ?‘ˇđ?‘ˇđ?‘ˇđ?‘ˇđ?&#x;‘đ?&#x;‘ Ă— đ?‘ˇđ?‘ˇđ?‘ˇđ?‘ˇđ?‘ˇđ?‘ˇđ?&#x;’đ?&#x;’ ) đ?’šđ?’šđ?’šđ?’šđ?’šđ?’šđ?’šđ?’š
đ?‘đ?‘đ?‘đ?‘đ?‘đ?‘đ?’‚đ?’‚đ?’?đ?’? đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’? đ?’?đ?’?đ?’?đ?’? đ?’?đ?’?đ?’?đ?’?đ?’?đ?’? đ?’‡đ?’‡đ?’‡đ?’‡đ?’‡đ?’‡đ?’‡đ?’‡đ?’‡đ?’‡đ?’‡đ?’‡đ?’‡đ?’‡đ?’‡đ?’‡ (đ?’‘đ?’‘đ?’‘đ?’‘đ?’‘đ?’‘đ?’‘đ?’‘đ?’‘đ?’‘đ?’‘đ?’‘) =
đ?&#x;Žđ?&#x;Ž. đ?&#x;?đ?&#x;? Ă— (đ?&#x;Žđ?&#x;Ž. đ?&#x;?đ?&#x;? Ă— đ?&#x;Žđ?&#x;Ž. đ?&#x;?đ?&#x;? Ă—đ?&#x;Žđ?&#x;Ž. đ?&#x;?đ?&#x;?Ă— đ?&#x;Žđ?&#x;Ž. đ?&#x;?đ?&#x;?) đ?’šđ?’šđ?’šđ?’šđ?’šđ?’šđ?’šđ?’š
đ?‘đ?‘đ?‘đ?‘đ?‘đ?‘đ?‘đ?‘đ?‘đ?‘ đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’?đ?’? đ?’?đ?’?đ?’?đ?’? đ?’?đ?’?đ?’?đ?’?đ?’?đ?’? đ?’‡đ?’‡đ?’‡đ?’‡đ?’‡đ?’‡đ?’‡đ?’‡đ?’‡đ?’‡đ?’‡đ?’‡đ?’‡đ?’‡đ?’‡đ?’‡ (đ?’•đ?’•đ?’•đ?’•đ?’•đ?’•đ?’•đ?’•đ?’•đ?’•đ?’•đ?’•đ?’•đ?’•đ?’•đ?’•đ?’•đ?’•đ?’•đ?’•) =
đ?&#x;?đ?&#x;? Ă— đ?&#x;?đ?&#x;?đ?&#x;?đ?&#x;?−đ?&#x;“đ?&#x;“ đ?’šđ?’šđ?’šđ?’šđ?’šđ?’šđ?’šđ?’š
Table 4-3 shows the comparison of likelihood of the example scenario with UK HSE Tolerable Risk Criteria. Impact to workers and society are lower than UK HSE Tolerable Risk Criteria.
Population
Individual (worker)
Society
Example
UK HSE Criteria
Scenario
(Tolerable Risk
Likelihood
Criteria)
1 Ă— 10−6 đ?‘Śđ?‘Śđ?‘Śđ?‘Śđ?‘Śđ?‘Śđ?‘Śđ?‘Ś 1 Ă— 10−5 đ?‘Śđ?‘Śđ?‘Śđ?‘Śđ?‘Śđ?‘Śđ?‘Śđ?‘Ś
1 Ă— 10−3 đ?‘Śđ?‘Śđ?‘Śđ?‘Śđ?‘Śđ?‘Śđ?‘Śđ?‘Ś
1 Ă— 10−4 đ?‘Śđ?‘Śđ?‘Śđ?‘Śđ?‘Śđ?‘Śđ?‘Śđ?‘Ś
Comparison
Individual (worker) risk is lower than UK HSE tolerable risk criteria Societal risk is lower than UK HSE tolerable risk criteria
Table 4-3 Comparison of Example Scenario Likelihood of Fatality with UK HSE Tolerable Risk Criteria Table 4-4 shows the comparison of the likelihood of the example scenario with UK HSE Broadly Acceptable Risk Criteria. Impact to workers is comparable to UK HSE Broadly Acceptable Risk Criteria, while impact to society is higher. This is also based on the assumption that people are always present in the surrounding areas, which is a conservative assumption. Example Population
Scenario Likelihood
Individual (worker)
Society
1 Ă— 10−6 đ?‘Śđ?‘Śđ?‘Śđ?‘Śđ?‘Śđ?‘Śđ?‘Śđ?‘Ś 1 Ă— 10−5 đ?‘Śđ?‘Śđ?‘Śđ?‘Śđ?‘Śđ?‘Śđ?‘Śđ?‘Ś
UK HSE Criteria (Broadly Acceptable Risk
Comparison
Criteria) Individual (worker) risk is lower than
1 Ă— 10−6 đ?‘Śđ?‘Śđ?‘Śđ?‘Śđ?‘Śđ?‘Śđ?‘Śđ?‘Ś
UK HSE broadly acceptable risk criteria Societal risk is higher than UK HSE broadly acceptable risk criteria
Table 4-4 Comparison of Example Scenario Likelihood of Fatality with UK HSE Broadly Acceptable Risk Criteria
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