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Audit of electrical systems on Ringhorne

During the period 10-13 September 2007, the Petroleum Safety Authority Norway (PSA) conducted an audit of ExxonMobil Exploration and Production Norway AS (ExxonMobil). This audit was aimed at electrical systems on Ringhorne. Our general impression of the electrical installations on Ringhorne was good. However, we did identify some regulatory nonconformities during the audit.


RinghorneThe audit emphasized

  • internal control,
  • third-party equipment,
  • regulations/recognized norms,
  • qualifications/competence,
  • maintenance management,
  • ignition source control,
  • follow-up of the NPD's audit report, Week 8-2003,
  • functional tests of safety systems.

Ringhorne (Source: ExxonMobil)

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

The PSA shall also contribute towards reducing the risk level in the offshore petroleum activities by following up to ensure that the players facilitate technical and operational integrity on the facilities, as well as follow-up the interaction between human beings/technology/organization in systems that are critical in terms of HSE.

Electrical and safety systems make up key parts of the technical barriers on a facility, and safeguarding these systems properly is important in order to maintain an acceptable risk level.

location map

Location Ringhorne

Purpose of the audit
The purpose of the audit was to confirm that ExxonMobil plans, manages and carries out its activities in accordance with applicable regulations and recognized norms.

Result of the audit
Our general impression of the electrical installations on Ringhorne was good. However, we did identify three (3) regulatory nonconformities during the audit.

These nonconformities were linked to the use of locking procedures and recording of alarms. The audit report also contains items where there is potential for improvement.

Contact person in the Petroleum Safety Authority Norway:
Mike Theiss