Risk Assessment Example - Mobile Offshore Unit (MOU) Relocation Operations PDF

 

Marine Safety Forum - Stage 1 Risk Assessment Example - Mobile Offshore Unit (MOU) Relocation Operations

Qualifying the Risk The matrix used for determining the risk rating for this Stage 1 Risk Assessment has come from the Step Change in Safety Task Risk Assessment Guide (2007). Hazard Severity M ode rat e

N e gligible

Slight

H igh

Ve ry H igh

Negligible injury, no absence absence from w ork

M inor injury injury requiring first aid treatment

Injury leading to a lost time incident

Involving a single death or serious injury

M ultipl ultiple e deaths

L

L

L

L

L

L

L

L

M

M

L

L

M

M

H

L

M

M

H

H

M

M

H

H

H

Very U nlikely nlikely A freak combination of factors w ould be required for an an incident to result

Unlikely   e   c   n   e   r   r   u   c   c    O    f   o    d   o   o    h    i    l   e    k    i    L

A rare combination of factors w ould be required for an an incident to result

Possible Could happen w hen additional factors are present but otherw ise unlikely unlikely to occur

Likely Not certain to happen but an additional factor may result in an accident

Very Likely Almost inevitable inevitable that an incident w ould result result

Risk Rating Criteria To determine the Risk Rating (RR), multiply the Hazard Severity (S) by the Likelihood of Occurrence (L). Low Risk

Identified as L in the matrix. May be acceptable; however, review task to see if risk can be reduced further.

Medium Risk

Task should only proceed with appropriate management authorisation after consultation with specialist personnel and assessment team. Where possible, the risk should be redefined to take account of the hazards involved or the risk should be reduced further prior to task commencement.

High Risk

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Identified as H in the matrix. Task must not proceed. It should be redefined or further control measures put in place to reduce risk. The controls should be reassessed for adequacy prior to task commencement.

Risk Matrix Applicable to Main Example Stage 1 Risk Assessment Document

Version 3 - Revision 00 - February 2011

 

Marine Safety Forum -Stage 1 Risk Assessment Example - Mobile Offshore Unit (MOU) Relocation Operations

MSF AIDE MEMOIRE TO STAGE ONE RISK ASSESSMENT FOR PLANNING MOU MOVES The process that is usally followed whe when n planning a MOU relocation is as follows; 1 2 3 4 6 7 8 9 10 11 12

Identify surface location and surrounding infrastructure Identify Rig Develop basic principles and a step by step method statement of how the MOU relocation will be carried out. Hold a high level Risk Assessment and Hazard Identification meeting (Stage 1) Publish and close-out actions arising from above Develop formal MOU-Relocation procedures based on output of Stage 1 Risk Assessment Publish and circulate MOU-Relocation for review toand all st stake-holders ake-holders Hold pre-MOU-Relocation-meeting pre-MOU-Relocation-me eting as aprocedures final Risk Assessment document check Amend and agree final procedures and issue for operations Hold Stage 2 Risk Assessment offshore to review the procedures and Stage 1 Risk Assessment and apply loca locall MOU and/or situation specific peculiarities Hold documented Job Safe Analyses (JSA) and Toolbox Talks (Stage 3 Risk Assessment) onboard individiual vessels and installations offshore

Each Operator/Duty Holder during the process of planning MOU-Relocations is required to assess key risks associated with the activity and apply appropraite mitigations to reduce risk to "as low as reasonably practicable". Stage 1 of this document is intended to be a worked example of a risk assessment assessment to act as a prompt for individual Operators/Duty Holders to hold their own internal risk assessments/hazard identification. It is recommneded that stage 1 of this document is used in the planning stage prior to development of formal procedures for the activity. Stage 2 of this document is intended to be a prompt list to carrying out risk assessments offshore prior to the MOU move commencing and ideally should involve the operator/duty holder, MOU owner, towmasters and vessel masters as a minimum. The basis of the stage 2 risk assessment is to review the approved MOU move procedures and stage 1 risk assessment and apply local variations where applicable.

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Main Stage 1 Example Risk Assessment Document

Version 3 - Revision 00 - February 2011

 

Marine Safety Forum -Stage 1 Risk Assessment Example - Mobile Offshore Unit (MOU) Relocation Operations

 Originated:  First Annual Revision Second Annual Revision:

Example Risk Assessment – Stage 1 Summary of Activities Covered by this Worked Risk Assessment This example of High Level Risk Assessment applies to the planning and execution of rig move operations. Existing Control Measures North W est European Area Guidelines - Version 2 Current Common Marine Inspection Document with all actions addressed MSF Template of Data

National Statutory Requirements MOU Owner Safety Management System Marine Operations Manuals – all parties

M SF MOU AnchoMove r Hand ling Manua MSF Procedure - lContent Guidance MSF AHTS Checklist MOU Move Specific Procedures

#

Activity

Hazards

Apr-08 Sep-09 Feb-11

L essonsManufacturers Learned from Handling previous o perations Anchor Instruction International Shipboard Management Code

Consequences

Initial Risk S

L

Control Measures

RR

Action By

Residual Risk S

L

Actions

RR

Step 1 – Confirmed Location and Rig Identification.

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Main Stage 1 Example Risk Assessment Document

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Marine Safety Forum -Stage 1 Risk Assessment Example - Mobile Offshore Unit (MOU) Relocation Operations

Activity

#

Hazards

Step 2 - Planning Identifying Specific Requirements Assessing the location W eather W ater depth Seabed conditions Currents

Consequences

Inability to achieve location Inadequate procedures

Initial Risk S

L

RR

VH

VL

H

Inadequate vessel and equipment specification

Tides Subsea infrastructur ture

Damage to seabed assets and/or towing and mooring assemblies

Survey

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Residual Risk S

L

RR

VH

U

M

VH

U

M

Actions

Location approval Catenary Calculations Location historical data (where applicable)

T raffic density Dynamic loadings Lack of competence/ Lack of Incorrect data time/ resource constraints Experience Naval Architects Approval authorities Warranty Assurance

Define limits of weather Site survey Mooring analysis & deployment / recovery load analysis Traffic Survey

Action By

Field drawings Hind Casting & Weather Forecasting Heights determined for seabed clearances for anchor handling and towing

Mooring assemblies Other assets

People

Control Measures

VH

e.g. Inability to achieve required location Inadequate procedures Inadequate vessel and

VL

H

Previous experience of location Tidal & Current Data Approved vendors

Contractor audits Industry accreditation Proven history

equipment specification

Main Stage 1 Example Risk Assessment Document

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Marine Safety Forum -Stage 1 Risk Assessment Example - Mobile Offshore Unit (MOU) Relocation Operations

#

Activity

Hazards

Consequences

Initial Risk S

Step 3 - Planning Develop Procedures Input data

Lack-of or wrong input data

Competence of author Lack of knowledge

VH Schedule delay Inadequate selection of vessels, personnel, equip Incorrect moorin lan Incorrect location

VH

Schedule delay

L

RR

VL

H

VL

H

Inadequate specification / selection of vessels, personnel, equipment Incorrect mooring plan Damage to property and equipment

Lack of understanding of required content

Harm to personnel Unrealistic scheduling Schedule delay Inadequate specification / selection of vessels, personnel, equip

Control Measures

Site survey data Mooring analysis and recovery / deployment load analysis Location HAZOP / HAZID Accurate field survey data Survey procedures Verification of data Lessons learned including use of previous procedures Review and approval process which should define reviewers Approved Vendors

Action By

Residual Risk S

L

RR

VH

U

M

VH

U

M

VH

VU

L

Actions

Contractor audits Proven history Realistic schedule to be identified VH

VL

H

Existing control measures No additional controls identified

Incorrect mooring plan Damage to property and equipment Harm to personnel Critical items / issues not identified

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Main Stage 1 Example Risk Assessment Document

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Marine Safety Forum -Stage 1 Risk Assessment Example - Mobile Offshore Unit (MOU) Relocation Operations

#

Activity

Preparation, Review, Approval and distribution of Procedures and Onshore pre-move meeting

Hazards

Pressure of time

Competency of review team.

Distribution

Consequences

Inadequate time to prepare, develop and review procedures

Inadequate review

Initial Risk S VH

VH

Correct procedures are not distributed to the relevant parties. Relevant parties not prepared

VH

L L

L

L

Control Measures

RR H Sufficient time and resources allowed for preparation and developing procedures

Action By

Residual Risk S VH

L U

RR M

H

Procedures issued in sufficient time to allow adequate review Procedures to be reviewed by competent

VH

U

M

H

personnel and as a minimum to include: (i) Operator (ii) MOU Owner (iii) Survey Reps (iv) Procedure Author (v) Marine competent MOU mover Define distribution list

VH

U

M

Actions

F al revision ofpersonnel procedures to be signed off byinaccountable

Potential delays

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Main Stage 1 Example Risk Assessment Document

Version 3 - Revision 00 - February 2011

 

Marine Safety Forum -Stage 1 Risk Assessment Example - Mobile Offshore Unit (MOU) Relocation Operations

Activity

#

Step 4 - Planning In-Field Operations Timing

People

Hazards

Inadequate preparation period SIMOPS

Lack of competent and experienced people Inadequate manning

Shortcuts

Equipment, vessel and personnel lead times / availability Damage to Equipment Harm to personnel Damage to equipment Delay to schedule

Poor or lack of meaningful communication Unsafe practices

Lack of continuity

operations Fatigue Loss of focus

Initial Risk

Dilution of experience

Control Measures

S

L

RR

VH

VL

H

Planning Adequate notification period for moves to be defined. Resources Integrated communication between relevant parties

VH

VL

H

Existing control measures

Time pressure Delay in operation

Changes to personnel

Lack of understanding of equipment, operation and procedures Inexperience of proposed

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Consequences

Action By

Residual Risk S

L

RR

VH

U

M

H

U

M

Actions

Approved vendors with competency assurance systems in place Demonstrable work experience available (CV, work history) Shift change not to be undertaken during critical operations Realistic schedule that includes allowance for familiarisation, delays and rest periods Personnel competent for proposed operation

Clear roles and responsibilities Adequate shift change handover to take place Staggered shift change where possible New crews to be adequately briefed in the operation Crew changes during MOU move operations to be adequately assessed using Management of Change process

Main Stage 1 Example Risk Assessment Document

Version 3 - Revision 00 - February 2011

 

Marine Safety Forum -Stage 1 Risk Assessment Example - Mobile Offshore Unit (MOU) Relocation Operations

#

Activity

Chartering Vessels

Hazards

AHTS not fit for purpose

Consequences

Damage to, or loss of vessels, property / assets

Initial Risk S VH

L VL

RR H Existing Control Measures

Inadequate selection of vessels and crew Injury to personnel Schedule delay Mobilisation demobilisation of Equipment

Delay to schedule Equipment and/or mobilisation location not fit for purpose Incorr Incorrect ect ve vesse ssell prepar preparati ation on Damage Damage tto o equ equipm ipment ent / property / assets Competence of people Harm to people

H

P

Control Measures

M

Duty Holders to satisfy themselves that a vessel assurance process is in place and is verified. Person chartering vessel has to be familiar with the operation and the vessels intended activity Vessel requirements clearly defined Vessel meets defined specification in procedures Existing control measures

Action By

Residual Risk S H

L U

RR M

M

U

L

Actions

Correct Load out plan with defined load list supplied to vessels Approved vendors responsible for supplying equipment as per operators / rig owners standards Confirmation of equipment at mobilisation meets procedural requirements Certified equipment Level 2 Risk Assessment to be undertaken specific to the equipment being mobilised Substitute equipment to be confirmed with operator / MOU owner prior to mob Adequate time given to vessel configuration

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Main Stage 1 Example Risk Assessment Document

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Marine Safety Forum -Stage 1 Risk Assessment Example - Mobile Offshore Unit (MOU) Relocation Operations

#

Activity

Vessel Procedural Review and Detailed Operational Briefing and final assurance and mobilisation

Hazards

Consequences

S VH

Insufficient time to mobilise personnel, undertake MOU induction and familiarisation Insufficient time to review procedures

Delay in operation

Lack of understanding of procedures

Harm to people

Inadequate briefing

Lack of understanding of operation Fatigue Delay in operation

Insufficient rest time Mobilisation, Insufficient time to mobilise Procedural Review and personnel, undertake MOU Detailed Operational induction and familiarisation Briefing of assigned MOU move personnel e.g. Tow Master, Marine Rep, Survey rep, etc.

L VL

Control Measures

RR H Existing control measures

Damage to, or loss of vessels, property / assets

VH

VL

H

Existing control measures

Competent and experienced personnel familiar with the operation Adequate time given to review and discuss

Inadequate briefing

Lack of uunderstanding of operation

the procedures, understand the operation and their role Sufficient time in process to ensure MOU induction and familiarisation is undertaken

Insufficient rest time

Fatigue

procedures

Action By

Residual Risk S VH

L U

RR M

VH

U

M

Actions

Adequate time given to vessel to review and discuss the procedures, understand the operation and the vessels role Competent and experienced personnel familiar with the operation to conduct the vessel briefings and final assurance

Damage to, or loss of vessels, property / assets Harm to people

Insufficient time to review procedures Lack of understanding of

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Initial Risk

Sufficient rest time to be given prior to commencement of operations

Main Stage 1 Example Risk Assessment Document

Version 3 - Revision 00 - February 2011

 

Marine Safety Forum -Stage 1 Risk Assessment Example - Mobile Offshore Unit (MOU) Relocation Operations

#

Activity

Pre-Operational Commencement Meeting (offshore)

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Hazards

Vessels do not understand the MOu requirements MOU does not understand the vessels capabilities and limitations

Consequences

Initial Risk S VH

Delay in operation Damage to, or loss of vessels, property / assets

L P

Control Measures

RR H Existing control measures

Action By

Residual Risk S M

L U

Actions

RR L

Discussion between the MOU and the vessels to ensure accurate sharing of information and vessel equipment availability

Failure to manage any Harm to people changes MOU and vessel crew are not familiar with their roles in the operation. Clear lines of communication and accountability are not defined.

MOU to fully understand the vessels capabilities and limitations Confirmation and agreement from vessels that they understand their roles in the operation Operational status of vessels and MOU to be confirmed

Lack of co-ordination of operation Failure to identify specific risks associated with the operation

Define communication lines and accountability Continual review of all factors to be undertaken and communicated until such times as a start time has been identified and agreed between all parties. Confirmation that Level 2 Risk Assessments have been undertaken and any issues shared with all parties involved in the operation Management of change assessment

Main Stage 1 Example Risk Assessment Document

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Marine Safety Forum -Stage 1 Risk Assessment Example - Mobile Offshore Unit (MOU) Relocation Operations

#

Activity

Establishing and assessing environmental Conditions

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Hazards

Consequences

Information on environmental Damage to, or loss of vessels, conditions and forecast not property / assets available or incorrect

Initial Risk S VH

L VL

Control Measures

RR H Operational sta tattus of ves vessels and MOU to be confirmed within operating limits and continual reviews to be undertaken

Insufficient environmental working window

Harm to people

Suitable weather window identified and agreed for each phase of the operation to

Inadequate monitoring and appraisal of environmental conditions

Damage to the environment

commence suspended S uitable monor itobe ring equipment to be available onsite and utilised

Operating out with the safe working limits of the vessels and/or and MOU

Accurate and up-to-date Environmental information and forecasting to be provided provided and verified Open lines of communication between MOU and vessels and vice-versa to advise of any change in status

Main Stage 1 Example Risk Assessment Document

Action By

Residual Risk S M

L U

Actions

RR L

Version 3 - Revision 00 - February 2011

 

Marine Safety Forum -Stage 1 Risk Assessment Example - Mobile Offshore Unit (MOU) Relocation Operations

#

Activity

Hazards

Consequences

Initial Risk S

L

RR

VH

P

H

Control Measures

Action By

Residual Risk S

L

RR

VH

U

M

Actions

Step 5 - Vessel Demobilisation Re Rele leas ase e of v ves esse sels ls

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Pr Prem emat atur ure e rele releas ase e of ves vesse sels ls Re Redu duce ced d redu redund ndan ancy cy a and nd/o /orr capability of remaining vessels

Planning - adequate notification period for moves to be defined. Resources Integrated communication between relevant parties

Main Stage 1 Example Risk Assessment Document

Version 3 - Revision 00 - February 2011

 

Marine Safety Forum - Stage 2 Risk Assessment Example - Mobile Offshore Unit (MOU) Move Operations

 Risk Assessment – Stage 2 Prompt Activity

Typical Hazards

Potential Consequences

 Originated:  First Annual Revision  Second Annual Revision: Typical Control Measures

Apr-08 Sep-09 Feb-11 Comment

The following points are included to act as an 'aide memoire' to assist in the Stage 2 Risk Assessment - To be discussed Offshore Anchor Handling

Dropped Objects

Transfer / Receiving PCP

Failure to follow procedures Harm to people

Cha Chasing sing Ou Outt / Str triipp ppiing back back

Vesse essells in in cl close ose pro proxi ximi mity ty to rig / platform and each

Damage to the environment

J Hooking / Grappling

other Collision

Delay to schedule

Crane / lifting operations

Vessel capsize

Man Overboard

W inch Operation

Other marine traffic

Flooding

Breaking Out Recovery / Decking the Anchor

Breakdown in communications Equipment failure

Recovery and deployment of mooring system

Working on deck and / or over side

Mooring analysis calculations

Fitting of specialised moorings

Over stressing equipment

Bolster / Un-bolstering Anchor

High breakout loads

Decking / Overboarding to be carried out in “safe area” (clear of such as subsea assets) Awareness of anchor orientation when decking / overboarding overboarding

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Damage to, or loss of vessels, property / assets Break out limits and strategy to be defined Good communication between rig / vessels Extension line to be highlighted beyond anchor position Identify vessel excursion limits from intended mooring track Back deck clear policy when wires and equipment are  are under tension Planned Maintenance System Certified and/or inspection and testing regime of equipment in place

Stage 2 (Offshore) Risk Assessment Example Prompt List

Version 3- Revision 00 - February 2011

 

Marine Safety Forum - Stage 2 Risk Assessment Example - Mobile Offshore Unit (MOU) Move Operations

Activity Setting Anchor

Typical Hazards

Potential Consequences

Vessel(s) unable to hold station and/or heading Loss of control of anchor and/or equipment on deck

Survey equipment not working, ready or set-up properly Entanglement of wired with vessel(s)

Excessive movement of crane assemblies Lack of understanding of emergency preparedness during operation Operating outwith safe working limits Tandem operations Unable to maintain required tension

Typical Control Measures

Comment

Adequate positive stability to be maintained in worst case scenario Minimum separations and distances to be agreed and adhered to between all parties involved in the operation Change of rig thruster status to be advised Operational status of vessels and rig to be confirmed within operating limits and continual reviews to be undertaken Suitable crane assembly (pennant length, hook, headache ball) All Emergency release procedures to be defined and clearly understood Equipment to be operated within manufacturers specification Survey Quality Assurance Procedures Redundancy in survey equipment Water tight integrity policy strictly adhered to during the operation

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Stage 2 (Offshore) Risk Assessment Example Prompt List

Version 3- Revision 00 - February 2011

 

Marine Safety Forum - Stage 2 Risk Assessment Example - Mobile Offshore Unit (MOU) Move Operations

Activity

Typical Hazards

Potential Typical Control Measures Consequences Damage to, or loss of Existing control mea measures vessels, property / assets

Towing

Other marine traffic

Passing Passi ng / Recov Recovery ery of Tow Bridle Bridle

Proxi Proximity mity of towing towing vessel Harm to people to rig Tow len length gth vs w wate aterr de depth pth Damage Damage tto o th the e environment Inadequate pa passa sag ge pl plan Delay to sch sche edule

Under Tow

Change in environmental conditions Critical motions exceeded (rig and vessels)

Collision Floodi Flooding ng an and/o d/orr caps capsiz ize e

Towing arrangements and Lo Loss ss of of cont contro roll o off tow tow equipment not fit for Purpose Loss of tow Man Overboard

Equipment failure Equipment failure Loss of water tight integrity Inadequate communication

Good communication

Comment NW EA EA Guidelines to be reviewed with regard to SWL vs BL ISM reference to be resolved

Limitation of equipment known and understood Certi rtifie fied an and in inspecte cted eq equipmen ment and connections Planned Maintenance System Tow Mast Master er vi visua suall ins inspec pectio tion n and review of rig towing system Limi Limiti ting ng loa loads ds to to take take int into o ac acco coun untt age and condition of equipment Emergency Tow arrangements clarified before commencement of tow W ater tight integrity checks to be undertaken Rig specific passage plan prepared Spare tow wire available and accessible on tow vessel Navigation warnings If heli-ops undertaken during tow then speed and heading to be agreed

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Stage 2 (Offshore) Risk Assessment Example Prompt List

Version 3- Revision 00 - February 2011

 

Marine Safety Forum - Stage 2 Risk Assessment Example - Mobile Offshore Unit (MOU) Move Operations

Activity Manoeuvring / Positioning

Typical Hazards Proximity to other assets (surface and subsea) Inability to maintain intended track Equipment Failure Poor communication Excessive thrust from rig

Potential Typical Control Measures Consequences Damage to, or loss of Existing control measures vessels, property / assets Harm to people

Good communication

Damage to the environment Delay to schedule

Lo Loss ss of co cont ntro roll o off ttow ow

Limitation of equipment known and understood Certified and inspected equipment and connections Planned Maintenance System Limitin Limiting g loa loads ds to take take int into o acco account unt age and condition of equipment Co Cont ntin inge genc ncy y pr proc oced edur ures es to be

Unable to achieve final position

agreed and understood Emergency Procedures clarified before commencement of approach

Collision Floodi Flooding ng an and/o d/orr caps capsiz ize e

Comment

Interfaces with other assets / 3 rd parties

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Stage 2 (Offshore) Risk Assessment Example Prompt List

Version 3- Revision 00 - February 2011

 

Marine Safety Forum - Stage 1 Risk Assessment Example - Mobile Offshore Unit (MOU) Move Operations

THE FOLLOWING ‘ACTIONS’ WERE IDENTIFIED AS NECESSARY TO REDUCE THE RISKS INVOLVED TO A LEVEL THAT IS ‘AS LOW AS IS REASONABLY PRACTICABLE':

No. 1 2 3 4 5 6 7 8 9 10 11

ACTION

WHEN

BY WHOM

ACTION TAKEN

CLOSED

12 13 14 15 16 17 18 19 20

Action Tracking Sheet 

Stage 1 Risk Assessment Example Action Tracking List

Version 3 - Revision 00 - February 2011