Noble – Noble Invincible – risk management, electrical facilities

Source: 12/20/2023, Location: Europe

The Petroleum Safety Authority Norway (PSA) has carried out an audit of Noble Drilling AS (Noble) focused on risk management, electrical facilities, safety instrumented systems and technical safety on the Noble Invincible facility. The audit was conducted from 19 October to 1 November 2023.

Objective The objective of the audit was to monitor how the company complies with regulatory requirements for risk and barrier management within the domains of electrical facilities, safety instrumented systems and technical safety. The audit also monitored installed lithium ion battery systems on the facility and the company’s handling of the risk that such installations entail.

In the audit, we also investigated whether previously identified non-conformities had been addressed in accordance with the company’s feedback to us.

A total of six non-conformities were identified within the following systems and areas:
Follow-up of barriers
Maintenance programme
Work in and operation of electrical facilities
Electrical facilities
Passive fire protection
Fire alarm system

We also observed two factors that we have chosen to categorise as improvement points. These concerned:
Risk reduction, overall assessment and assessment of uncertainty
Registration of faults in safety-critical equipment
Previous non-conformities

Concerning non-conformities that we identified previously, we found that the following from audits in 2016 of electrical facilities, technical safety, barrier and maintenance management on Maersk Invincible had not been fully addressed in line with the company's feedback to us:

Non-conformity in respect of electrical installations. (Reason: Lack of lamp test on essential equipment (starting air compressor main/emergency generator). Non-conformity in respect of work in and operation of electrical facilities. (Reason: We continued to observe a lack of labelling of high-voltage cable installations (HV cables) for cable ducts and field cables.)

What happens now?
We have asked Noble to report by 31 January 2024 on how the non-conformities will be addressed and for their assessment of the improvement points observed.

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