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

RISK-BASED INSPECTION METHODOLOGY, PART 3—CONSEQUENCE OF FAILURE METHODOLOGY 3-113
5.13 Nomenclature
Coefficients C
1
through C41
that provide the metric and U.S conversion factors for the equations are provided
in Annex 3.B. The following lists the nomenclature used in Section 5.
Aburn is the pool fire area based on burning rate, associated with the n th release hole size, m 2 (ft 2 )
pf , n
AIT
is the autoignition temperature of the released fluid, K (°R)
Amax is the maximum pool fire area based on a pool depth of 5 mm (0.0164 ft), associated with the
pf , n
n th release hole size, m 2 (ft 2 )
A is the pool fire surface area, associated with the n th release hole size, m 2 (ft 2 )
pf , n
BP
s
is the boiling point temperature of the stored fluid at normal operating conditions, K (°R)
CA is the final consequence area, m 2 (ft 2 )
f
CA is the component damage consequence area for a BLEVE associated with the rupture case, m 2
bleve
f , cmd
(ft 2 )
CA is the personnel injury consequence area for a BLEVE associated with the rupture case,
bleve
f , inj
m 2 (ft 2 )
CA is the footprint at grade level of the portion of the vapor cloud that exceeds the toxic exposure
cloud
f , n
limit of the toxic component being evaluated, associated with the n th release hole size, m 2 (ft 2 )
CA is the component damage consequence area for a fireball associated with the rupture case, m 2
fball
f , cmd
(ft 2 )
CA is the personnel injury consequence area for a fireball associated with the rupture case, m 2 (ft 2 )
fball
f , inj
CA is the final overall component damage flammable consequence area, m 2 (ft 2 )
flam
f , cmd
CA is the component damage flammable consequence area associated with the n th release hole
flam
f , cmd , n
size, m 2 (ft 2 )
CA is the final overall personnel injury flammable consequence area, m 2 (ft 2 )
flam
f , inj
CA is the personnel injury flammable consequence area associated with the n th release hole size,
flam
f , inj,
n
m 2 (ft 2 )
CA is the component damage consequence area for a flash fire associated with the n th release hole
flash
f , cmd , n
size, m 2 (ft 2 )
CA is the personnel injury consequence area for a flash fire associated with the n th release hole
flash
f , inj,
n
size, m 2 (ft 2 )