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Audit of electrical and instrumented safety systems on Statfjord C

During the period 14-17 August 2007, the Petroleum Safety Authority Norway (PSA) conducted an audit of Statoil's Statfjord C facility. The audit targeted the electrical and instrumented safety system disciplines. Our general impression of conditions on the facility was good, but we did identify several nonconformities in relation to regulatory requirements.


In connection with the audit, we had conversations with relevant personnel, and we conducted tests and verifications of documents and facilities.

Statfjord C

Statfjord C (source: Statoil ASA)

Background for the audit
The PSA is to set standards for and follow up to ensure that the players in the petroleum activities maintain high standards as regards health, safety and the environment, and thereby also contribute towards creating the greatest possible values for the Norwegian society.

The PSA shall also contribute towards reducing the risk level in the petroleum activities by following up the players to ensure that they promote technical and operational integrity on the facilities, and also follow up the interplay between people/technology/organisation in HSE-critical systems.

Electrical and instrumented safety systems account for central parts of the technical barriers, and good follow-up of these is important in order to maintain an acceptable risk level.

Purpose of the audit
The purpose the audit was to evaluate Statoil's follow-up of Statfjord C, and verify that planning, implementation and follow-up of activities are in accordance with regulatory requirements linked to electrical and instrumented safety systems.

Electrical installations must be carried out, operated and maintained so that they do not represent a hazard to life, health and material assets.

Result of the audit
Our general impression of conditions on the facility was good.
However, during the audit we found four nonconformities in relation to the regulatory requirements, and three items were discovered where there is potential for improvements.

Nonconformities were noted regarding the following circumstances:

  • Locking of rooms with high voltage systems.

  • Deficient updating of documents.

  • Deficient handling of disconnections of safety systems.

  • Automatic start-up of fire pump in the event of gas detection.

During the audit we conducted function tests related to selected safety systems. We identified faults in the fire pump logic in connection with the implementation of these tests.

Contact person in the Petroleum Safety Authority Norway:
Mike Theiss