Unintended Release of Oil, Gas or Hazardous Substance (ignited or not), Fires and Explosions
Implementing Regulation Section A: Unintended release of oil, gas or other hazardous substances, whether or not ignited
RIDDOR 2013, Part 6 Dangerous Occurrences which are reportable in respect of an offshore workplace – 75; Release of Petroleum Hydrocarbon / 76; Fire or explosion / 77; Release or escape of dangerous substances; Supplementary HCR reporting
Also complete for the unintentional releases from a pipeline within the 500 meter zone of an installation
17.Section A1
Was there a release of hydrocarbon substances?
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Yes
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No
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If Yes complete from A1
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If No, go to A2
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Hydrocarbon Released
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Non Process
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Please specify
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(Supplementary)
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Choose a Hydrocarbon type
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Process
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Oil
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Gas
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Condensate
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2-Phase
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For gas or 2-Phase, state level of H2S
Enter estimated ppm. If less than 5 ppm enter “insignificant”.
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Enter estimated ppm. If less than 5 ppm enter “insignificant”
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(Supplementary) For gas, estimate approximate molecular weight
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Enter molecular weight
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n/a
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(Supplementary) For 2-Phase, state GOR (gas/oil ratio)
Specify units.kg/kg, scf/bbl
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Enter GOR and specify units
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n/a
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(Supplementary) For liquids, state density (kg/m3)
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Enter density and specify units
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(Supplementary) Please state water cut (where relevant) (%age of liquid by mass)
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Enter water cut
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n/a
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(Supplementary) Was the release limited/stopped due to a local manual intervention / isolation, separate from the ESDV system?
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Yes
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No
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(Supplementary) Did liquid spray/mist releases occur?
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Yes
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No
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Estimated quantity released
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Estimated quantity released
Specify units e.g. tonnes, kg, Nm3
[Nm3 is normal cubic metre]
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Enter quantity released and specify units
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(Supplementary) What is the basis for this estimate?
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Enter description
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(Supplementary) Total gas HC Inventory in system
Specify units e.g. tonnes, kg Nm3
[Nm3 is normal cubic metre]
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Enter gas HC Inventory in system and specify units
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(Supplementary) Total liquid HC Inventory in system
Specify units e.g. tonnes, kg
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Enter liquid HC Inventory and specify units
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(Supplementary) Extent of dispersion / liquid spread
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Enter extent of dispersion
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(Supplementary) What is the severity classification of this release
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Choose a rating
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Estimated initial release rate
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Estimated initial release rate
Specify units e.g. tonnes/day, kg/s, Nm3/s
[Nm3/s is normal cubic metre per second]
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Enter estimated initial release rate and specify units
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(Supplementary) Equivalent hole diameter
Based on hole area equated to a circular hole (mm)
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Enter diameter
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(Supplementary) Is hole size measured or estimated?
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Measured
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Estimate
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(Supplementary) If estimated, on what basis?
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Please describe
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Duration of leak
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Duration of leak
(seconds/minutes/hours)
(Estimated time from discovery, e.g. alarm, electronic log, to termination of leak)
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Enter duration and specify units
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Location of leak
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(Supplementary)
Module / area name
(Please state the name in common use on the installation, including subsea if appropriate)
[Please also complete the location check list below. Please indicate those items which come nearest to pinpointing the location of the leak.]
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Enter module/area name
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(Supplementary)
System Category
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Primary
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Select primary category
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Secondary
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Select secondary category
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Tertiary
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Select tertiary category
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(Supplementary)
Equipment category
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Primary
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Select primary category
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Secondary
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Select secondary category
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Tertiary
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Select tertiary category
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Other
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Please specify
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(Supplementary)
Separation Train
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Number
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Please specify
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Total
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Please specify
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Stage
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Please specify
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(Supplementary)
Valve type
(where valve is selected above in equipment category)
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Select one type
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Other
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Please specify
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(Supplementary)
Flange type
(where Flange is selected above in equipment category)
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Type
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Select one type
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Rating
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Select a rating
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Bore Size (in)
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Enter bore size
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Other
Specify Type, Rating and Bore Size (in)
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Please specify
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(Supplementary) For valves, flanges, pumps, tubing, pipework, pipelines and other fittings, please specify their size in terms of nominal bore, in inches (i.e. the nominal bore of the piping they connect to)
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Enter size
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(Supplementary) For PIG LAUNCHER/RECEIVERS and PRESSURE VESSELS give both the LENGTH and the DIAMETER in mm or inches, as available
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Enter size
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(Supplementary) For BOP Stacks indicate the design pressure rating, e.g. 5,000 psi.
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Enter design pressure rating.
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(Supplementary) Storage Tank Volume
(Specify units e.g. bbl, gall, m3 )
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Please specify
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(Supplementary) Piping & Pipelines
(Specify Rating)
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Please specify
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Hazardous area classification (i.e. zone at location of incident)
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Classification
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1
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2
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Unclassified
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Module ventilation?
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Natural
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Forced
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How many sides enclosed?
(Insert the number of walls, including floor and ceiling)
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Enter the number of walls, including floor & ceiling
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Module volume (m3)
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Enter volume in m3
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Estimated number of air changes (if known)
If “Natural ventilation” is selected above, type ” n/a”
Specify Hourly rate
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Specify hourly rate
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Weather conditions
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Wind speed
(specify units e.g. mph, m/s, ft/s or knots)
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Enter wind speed and specify units
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Wind direction
(Specify heading in degrees) from true north
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Enter wind direction
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Provide a description of other relevant weather conditions
(including sea conditions)
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Describe weather conditions
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System pressure
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Design Pressure
(Specify units,e.g. bar,psi or other)
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Enter design pressure and specify units
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Actual Pressure
(i.e. at time of release)
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Enter actual pressure and specify units
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(Supplementary) Design Temperature (maximum)
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Enter maximum design temperature and specify units
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(Supplementary) Design Temperature (minimum)
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Minimum design temperature and specify units
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(Supplementary) Actual Temperature
(i.e. at time of release)
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Actual temperature and specify units
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Means of detection
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Detection systems
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Gas
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Choose a Gas detection system
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Fire
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Choose a Fire detection system
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Smoke
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Other
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Please specify.
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(Supplementary) Instrumentation of Process System
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Choose an item
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(Supplementary) Planned Manual Inspection
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Choose an item
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(Supplementary) Unplanned Manual Inspection
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Choose an item
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Cause of leak
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(Supplementary) Please give a short description and complete the checklist below
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Describe cause of leak.
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Design Failure related to design
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Equipment
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Internal corrosion
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External corrosion
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Mechanical failure due to fatigue
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Mechanical failure due to wear out
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Erosion
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Material defect
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(Supplementary) Degradation of valve sealing
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(Supplementary) Loss of bolt tensioning
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(Supplementary) Degradation of flange gasket
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(Supplementary) Failure of a temporary repair
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(Supplementary) Degredation of permanent or temporary repair
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Other
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Please specify
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Operation
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Incorrectly fitted
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Left open
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Improper inspection
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Improper testing
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Improper operation
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Improper maintenance
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Dropped object
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Other impact
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Opened when containing HC
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(Supplementary) Incorrect fitting of flanges or bolts during maintenance
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(Supplementary) Pressure excursion
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(Supplementary) Overflow/over filling
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(Supplementary) Break-down of isolation system during maintenance (technical)
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(Supplementary) Work on wrong equipment (not known to be pressurised)
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(Supplementary) Incorrect blinding/isolation
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(Supplementary) Maloperation of temporary hoses
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(Supplementary) Maloperation of valve(s) during manual operation
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(Supplementary) Erroneous choice of installations of sealing device
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(Supplementary) Impact from bumping / collision
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(Supplementary) Maloperation of valve(s) during manual operations
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(Supplementary) Valve(s) in incorrect position after maintenance
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(Supplementary) Incorrect installation of small bore fittings
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(Supplementary) Temperature excursion
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Other
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Please specify
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Procedural
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Non-compliance with procedure
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Non-compliance with permit-to-work
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Deficient procedure
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Other
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Please specify
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Indicate the operational mode in the area at the time of release
Choose the relevant parameter(s) from the following categories
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Construction
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Hot work
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Cold work
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Draining
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Drilling
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(Supplementary) Oil
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(Supplementary) Gas
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(Supplementary) Exploration
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(Supplementary) Exploration
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(Supplementary) Appraisal
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(Supplementary) Appraisal
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(Supplementary) Development
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(Supplementary) Development
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Maintenance
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(Supplementary) Hot work
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(Supplementary) Cold work
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(Supplementary) Draining
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Routine Maintenance
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(Supplementary) Hot work
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(Supplementary) Cold work
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(Supplementary) Draining
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Normal Production
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Pipeline operations including Pigging
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Well Operations with Tree
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(Supplementary) Oil
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(Supplementary) Gas
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(Supplementary) Wireline
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(Supplementary) Wireline
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(Supplementary) Coiled tubing
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(Supplementary) Coiled tubing
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(Supplementary) Snubbing
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(Supplementary) Snubbing
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(Supplementary) Well test
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(Supplementary) Well test
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(Supplementary) Abandonment
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(Supplementary) Abandonment
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(Supplementary) Service
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(Supplementary) Service
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(Supplementary) Construction
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(Supplementary) Construction
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(Supplementary) Other
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(Supplementary) Other
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Well Operations without Tree
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(Supplementary) Oil
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(Supplementary) Gas
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(Supplementary) Wireline
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(Supplementary) Wireline
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(Supplementary) Coiled tubing
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(Supplementary) Coiled tubing
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(Supplementary) Snubbing
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(Supplementary) Snubbing
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(Supplementary) Well test
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(Supplementary) Well test
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(Supplementary) Abandonment
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(Supplementary) Abandonment
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(Supplementary) Service
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(Supplementary) Service
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(Supplementary) Construction
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(Supplementary) Construction
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(Supplementary) Other
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(Supplementary) Other
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(Supplementary) Blowdown
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(Supplementary) Commissioning
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(Supplementary) Cleaning
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(Supplementary) Flushing
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(Supplementary) Installation
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(Supplementary) Inspection
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(Supplementary) Reinstatement
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(Supplementary) Removal
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(Supplementary) Replacement
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(Supplementary) Sampling
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(Supplementary) Shutdown
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(Supplementary) Shutting down
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(Supplementary) Start up
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(Supplementary) Temporary
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(Supplementary) Testings
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(Supplementary) Top up
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Did ignition occur?
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Yes
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No
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If yes, was it:
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Immediate
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Delayed
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Delay time (sec)
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Enter time (sec).
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(Supplementary) Was it an ignition of a continuous operational release?
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Yes
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No
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Was there: (add sequence of events by numbering appropriate boxes in order of occurrence)
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Enter sequence number
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A flash fire
(no blast damage)
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Enter sequence number
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An explosion
(sufficient to cause blast damage)
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Enter sequence number
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A jet fire
(including spray fires)
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Enter sequence number
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A pool fire
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Ignition Source (if known)
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Provide a description of the ignition source
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Describe ignition source
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What emergency action was taken?
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Shutdown
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Automatic ESD initiation
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Manual
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(Supplementary) ESD initiation
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(Supplementary) Local initiation
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Blowdown
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Automatic
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Manual
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Deluge
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Automatic
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Manual
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CO2/Halon/inerts
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Automatic
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Manual
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Other
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Please specify
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(Supplementary) Time between detection and isolation.
(Specify units, e.g. seconds, Minutes)
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Enter time and specify units
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(Supplementary) Time between detection and start of blowdown.
(Specify units, e.g. seconds, Minutes)
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Enter time and specify units
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Call to muster
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At stations
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At lifeboats
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(Supplementary) Partial down man
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By helicopter
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By lifeboats
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Other
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Please specify
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(Supplementary) Installation evacuation
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By helicopter
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By lifeboats
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Other
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Please specify
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Any additional comments
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Enter additional comments
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18.Section A2
Description of circumstances, consequences of event and emergency response
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Enter description
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Was there a release of a non-hydrocarbon hazardous substance?
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Yes
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No
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If yes, specify the type and quantity of released substance
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Specify type and units
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Was there a non-hydrocarbon fire (e.g. electrical) with a significant potential to cause a major accident?
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Yes
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No
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Enter description
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Is the incident likely to cause degradation to the surrounding marine environment?
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Yes
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No
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If yes, outline the environmental impacts which may have already been observed or are likely to result from the incident
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Enter outline
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19.Section A3
Preliminary direct and underlying causes (within 10 working days of the event)
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Enter causes
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20.Section A4
Initial lessons learned and preliminary recommendations to prevent recurrence of similar events (within 10 working days of the event)
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Enter recommendations and lessons learned
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End of Part A Detailed Report
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