Overview

This page includes the SMP04 checklist, which will be used to complete preliminary hazard assessment of the proposed Oil SSTS. The output of which will be used to support the development of the URD and subsequently the SRD as part of the wider integrated set of safety activities required to support development of an acceptably safe system into service.

As can be usual at this stage, there is little information to base the assessment upon, however your team will complete the assessment against a functional block diagram of the Oil SSTS.

Task

Oil SSTS System Block Diagram

Review the information provided in the Scenario and create a system block diagram for the proposed Oil SSTS using the box below. [Hint, you can make/delete blocks and each block can be connected with a label]. This system diagram will help visualise the proposed system and support hazard identification.

Made with Padlet

[Hint, an example of a block diagram and how yours might look is provided here]

Hazard Identification

Using the General Checklist found in ASEMS SMP04, your needs to identify hazards associated with the proposed Oil SSTS as detailed in your block diagram.

Hazard Log

wdt_ID ID System Function / Component Hazard Title / Description Prelim - Accident Sequence Required Controls / Mitigation
399 1 Well head to seperator transfer system Well head exposure corrosive and erosive action Corrosion, galvanic or erosive effects on well head system causes degradation in containment functionality of the transfer system causing risk of leakage, explosion Audits and surveys of material state, routine maintenance and replacements, corrosion resistant materials, sacrificial components, ICCP, design margins, sea chests
427 2 Well Head to Seperator Transfer Flammable hydrocarbons flowing through electrically conductive pipework Static charge builds in pipework (ferrous) causing spark in hydrocarbon transfer system Options include: alternative/low conduction pipework, earthing and current monitoring
428 3 Well Head to seperator transfer system Hydrocarbon flowing at pressure in excess of nominal Blockage causes pressure rise in pipework causing explosion risk (non-combustible) Pressure monitoring system, alarms, auto cut-off for pumps, pressure relief valves, high FoS pipework
429 4 SSTS Pumps and components Exposure to Vibration Vibration Based injury caused by exposure to vibration from components of the SSTS System Anti vibration design measures, Compliance to Noise and Vibration Legislation, Regular maintenance and Surveys
430 5 Well to Seperator transfer system Pumped product outside transfer system handling spec (could be outside viscosity bounds, temperature bounds or flammability) Product cause premature failure of transfer system component causing loss of contaiment. Geo technical survey to understand make up of product, sensors indicative mechanical properties of the fluid
431 6 Well head to seperater transfer systems Seismic Shock on rig to well head Seismic causes displacement to well head causing loss of containment Live reporting and monitoring of seismic events, emergency shutdown and isoloations system
433 6 Well head to seperator transfer system Extreme weather and sea surge causes excessive displacement between SSTS and well head pipework Extreme weather > displacement of rig > pipe failure Weather moniting > system shut down when outside of allowables, design rules to mitigate displacements, thruster and heave compensation systems within rig to mitigate movement