Team D – Oil SSTS UOR

Overview

The objective of this workshop is to emphasis that safety must be considered, even when projects are subjected to compressed timescales, and the level of of risk must be made tolerable and ALARP.

Background Information

Your DT has been given an UOR to install a weapon system (Phalanx) onto the Oil Rig to protect again hostile action. The Phalanx weapon system is a rapid-fire, computer-controlled, radar-guided gun that can defeat anti-ship missiles and other close-in threats on land and at sea.

Description of the Phalanx

The basis of the system is the 20 mm M61 Vulcan Gatling gun autocannon, used since 1959 by the United States military on various tactical aircraft, linked to a Ku band fire control radar system for acquiring and tracking targets. This proven system was combined with a purpose-made mounting, capable of fast elevation and traverse speeds, to track incoming targets. An entirely self-contained unit, the mounting houses the gun, an automated fire-control system and all other major components, enabling it to automatically search for, detect, track, engage, and confirm kills using its computer-controlled radar system. Owing to this self-contained nature, Phalanx is ideal for support ships, which lack integrated targeting systems and generally have limited sensors. The entire unit has a mass between 12,400 to 13,500 lb (5,600 to 6,100 kg) (Wikipedia).

The system will be enabled/disabled by the rig control system, once enabled the Phalanx is at liberty to engage whatever threat it identifies.  Power will be drawn from the rig supply although consideration has been given to its own isolated power supply as a possible future modification.

In itself the Phalanx is a static unit so consideration will be needed in location and or mobility of the unit on the rig.

Location of Phalanx on the Oil Rig

The design team have provided an initial proposal for the location of the weapon system, to meet the UOR requirement for 360degree protection of the rig. You can find further information on the systems/equipment located on the oil rig, on the scenario page.

Task

You must develop an safety case report for the implementation of this UOR. The safety case report must reflect

• The location of the weapon system on the Oil Rig and the Oil SSTS, this may inform your high-level Hazard Identification.
• The safety hazards associated with the UOR, this will require an assessment using the ASEMS SMP04 General Checklist, and the population of the hazard log below. [You may wish to consider the hazards from the Oil SSTS SCR]
• The actions necessary to achieve an Tolerable and ALARP solution, this may be included within your safety argument.

UOR Hazard Log

Risk Class Definitions

UOR – Safety Case Report

Create the SCR for the UOR using the following headings, these can be copied into the Padlet.

• 1.0 System Description – Capture a description of the Oil SSTS UOR with sufficient details that the reader understands the boundary and the scope of the safety case (People, Equipment, Activity and Organisation), and interfaces with other safety cases.
• 2.0 Assumptions – Capture any assumptions that underpin the Oil SSTS UOR safety case, this could include assumptions about the scope, safety requirements, operational profiles operating environment etc.
• 3.0 Progress against the Safety Programme – DO NOT POPULATE THIS SECTION
• 4.0 Meeting the Safety Requirements – Use the headings below to demonstrate how safety requirements have been or will be met for the Oil SSTS UOR before the system moves into services.
  • 4.1 Oil SSTS UOR Safety Requirements – A statement describing the principle agreed Safety Requirements for the Oil SSTS UOR. Safety requirements that are unlikely to be met, either in part or in full, should be identified with remedial/follow-up actions identified
  • 4.2 Oil SSTS UOR Key Hazards – Summary of the Key Hazards and likely Accidents associated with the Oil SSTS UOR.
  • 4.3 Risk Management Actions – Capture any risk management actions that are outstanding, and identify both the risk and the organisation responsible for its management.
  • 4.4 Residual Risk posed by the Oil SSTS UOR – Capture the residual risk anticipated to be posed by the Oil SSTS UOR, this will make reference back to your hazard log and risk matrix.
  • 4.5 Issues of note – Capture any issues of particular sensitivity, e.g. use of restricted materials
  • 4.6 Regulator approvals/certificates – DO NOT POPULATE THIS SECTION
  • 4.7 Counter Evidence – DO NOT POPULATE THIS SECTION
  • 4.8 Interfacing Systems – Identify any systems that interface with the Oil SSTS UOR, and identify any potential safety aspects that should be considered.
• 5.0 Emergency / Contingency Arrangements – Capture what emergency/contingency arrangements have been or will need to be in place to support the Oil SSTS UOR, with reference back to the identified hazards
• 6.0 Operational Information – This section is aimed at the operator, and captures the outputs from the safety case that are relevant to the management of operational safety, including:
  • • A description of the operational envelopes;
    • Any limitations on use or operational capability;
    • The main areas of risk e.g. Class A/B risks;
    • Relevant information that can assist the operator in balancing the operational imperative against safety risk;
    • Demonstration that operating and maintenance procedures and publications have been, or will be, developed.
• 7.0 Independent Safety Auditor Report (DO NOT POPULATE)
• 8.0 Conclusion and Recommendations – Provide a safety argument that summaries the report and justifies why the UOR is safe to implement (or not)

[Hint, and example of the SCR structure can be found here]