Safety Case studies review for North Sea operator

A major operator in the southern North Sea wanted to install new facilities on one of its offshore platforms. The facilities were for the reception, separation and metering of gas production from a neighbouring installation. They included separate control and monitoring equipment and new shutdown control to be interfaced to existing systems

Installing these new facilities required a revision of the Safety Case involving the following studies before submission to The Regulator :

  • Fire and Explosion Risk Assessment (FERA)
  • Evacuation, Escape and Rescue Analysis (EERA)
  • Quantitative Risk Assessment (QRA)

Recognised for its extensive experience in this field within the UK and worldwide and because of its previous work on the QRA and other studies for this particular installation, the operator chose ESR Technology to carry out these studies.

The FERA and EERA were carried out to provide assessments that covered all the relevant evaluations and assessments identified in the Prevention of Fire and Explosion and Emergency Response (PFEER) Regulations.

Included in the FERA and EERA was a review against existing performance standards for the installation of the measures and safeguards connected with fire and explosion and EER. This was to identify where the standards may need modification and if so to make recommendations.

The QRA was carried out using ESR Technology’s RISK software to evaluate the risk levels. Additional or modified hazard and consequence scenarios followed methodologies consistent with the existing QRA. The results were presented in a format that allowed integration of revised values into the safety case. Any risk reduction measures associated with the new facilities were identified and evaluated in support of the ALARP process.


  • The studies demonstrated that following changes to the installation the risk remained within acceptable levels
  • The studies demonstrated that performance standards remained acceptable
  • The Operator’s Regulatory requirements were met by providing the information to enable an update of the installation safety case which was submitted to the HSE as part of the requirements of the Offshore Installations (Safety Case) Regulations 2005

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