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What I learned:
Firstly the function of a basic separator was explained to me and then I was given three aims when designing a control system for the separator:
Why do we need to control pressure?
Safety:
Environmental:
Commercial:
1) Target Mitigated Event Likelihood (TMEL) set at 0.01 (1 every 100 years)
2) Initiating Cause Likelihood (ICL)
ICL1 = 0.05 Wood ladder breaking
ICL2 = 0.1 lose footing on ladder
ICL3 = 0.2 ladder slips at base
3) Case 1 - Intermediate Event Likelihood (IEL)
IEL1 = ICL1 · PFD = 0.05 · 0.1 = 0.005
IEL2 = ICL2 · PFD = 0.1 · 0.1 = 0.01
IEL3 = ICL3 · PFD = 0.2 · 0.05 = 0.01
sum of IELs = 0.025>0.01
0.025 = 1 accident every 40 years
4) Case 2 (steel ladder and competent personnel)
IEL1 = ICL1 · PFD = 0.01 · 0.1 = 0.001
IEL2 = ICL2 · PFD · PFD = 0.1 · 0.1 · 0.1 = 0.001
IEL3 = ICL3 · PFD · PFD = 0.2 · 0.05 · 0.1 = 0.001
sum of IELs = 0.003<0.01
0.003 = 1 accident every 333.3 years
5) Case 3 (competent personnel)
IEL1 = ICL1 · PFD = 0.05 · 0.1 = 0.005
IEL2 = ICL2 · PFD · PFD = 0.1 · 0.1 · 0.1 = 0.001
IEL3 = ICL3 · PFD · PFD = 0.2 · 0.5 · 0.1 = 0.001
sum of IELs = 0.007<0.01
0.007 = 1 accident every 143 years
I have learned a lot from my experience at BP and I feel that I have gained knowledge that I will be able to use when deciding what career path I want to follow. Everyone who I encountered was friendly and willing to help me, and I think this shows the ethics that BP instils in its employees.
CREST silver award
Well organised and planned
Informal meetings with various people
Deadlines across the week with tasks from various people
As control systems were a relatively new area for me, I learned a lot and I understand more what they involve, as I didn't before.