API RP 581 - 3rd Ed.2016 - Add.2-2020 - Risk-Based Inspection Methodology

3-38 API RECOMMENDED PRACTICE 581
4) Calculate the probability weighted environmental cleanup costs, FC
f , environ , using Equation (3.92)
and the spill volume calculated for each release hole size, . The environmental costs, envcost
, are the environmental cleanup costs, $/bbl.
env
vol
n
f) STEP 12.6—Calculate the total FC using Equation (3.83), which is the sum of the costs determined in
STEPs 12.1 through 12.5.
4.13 Nomenclature
The following lists the nomenclature used in Section 4. The coefficients C
1 through C
41 , which provide the
metric and U.S. conversion factors for the equations, are provided in Annex 3.B.
a
AIL−CONT
a cmd
is a constant provided for reference fluids for Level 1 consequence analysis
is a constant AIL continuous release provided for reference fluids for Level 1 consequence
analysis for equipment damage area
AIL−CONT
a inj
AIL−INST
a cmd
is a constant AIL continuous release provided for reference fluids for Level 1 consequence
analysis for personnel injury area
is a constant AIL instantaneous release provided for reference fluids for Level 1 consequence
analysis for equipment damage area
AIL−INST
a inj
AINL−CONT
a cmd
is a constant AIL instantaneous release provided for reference fluids for Level 1 consequence
analysis for personnel injury area
is a constant for AINL continuous release provided for reference fluids for Level 1 consequence
analysis for equipment damage area
AINL−CONT
a inj
AINL−INST
a cmd
is a constant for AINL continuous release provided for reference fluids for Level 1 consequence
analysis for personnel injury area
is a constant for AINL instantaneous release provided for reference fluids for Level 1
consequence analysis for equipment damage area
AINL−INST
a inj
AIT
is a constant for AINL instantaneous release provided for reference fluids for Level 1
consequence analysis for personnel injury area
is the autoignition temperature of the released fluid, K (°R)
A
n is the hole area associated with the n th release hole size, mm 2 (in. 2 )
b
is a variable provided for reference fluids for Level 1 consequence analysis for analysis
AIL CONT
cmd
b − is a constant AIL continuous release provided for reference fluids for Level 1 consequence
analysis for equipment damage area