A Cumbrian nuclear site has received an improvement notice following a number of electrical safety incidents.

The Office for Nuclear Regulation (ONR) has served the notice on Sellafield Ltd, which comes after multiple electrical events became the subject of enquiries and investigations throughout recent months.

In December, the company was fined £320,000 following an electrical event in April 2020, which resulted in a worker sustaining serious injuries.

None of the incidents had any impact on the public or the environment, and all were reported to ONR by Sellafield in line with requirements.

Dr Mina Golshan, ONR deputy chief inspector, said: “The improvement notice will require Sellafield Ltd to make improvements to the training and supervision of staff carrying out electrical work across the whole site.

“We have identified these issues to be the root causes of the majority of recent events.

“The notice will also require that any lessons learned from these incidents are applied to all areas of the site where electrical work is carried out.

“As the independent safety regulator, We will hold Sellafield Ltd to account to ensure that progress and sustained improvements are made.”

Sellafield Ltd must comply with the notice by January 15 2022.

A spokesperson for ONR added: “While we are satisfied that Sellafield Ltd is currently meeting the high standards expected with regards to nuclear safety, as a regulator we require sustained improvements in the area of electrical safety.”

A Sellafield Ltd spokesman said: “Safety and security are our overriding priorities.

“Sellafield is a safe site, and we work tirelessly to ensure this remains the case.

“We acknowledge that aspects of our management of electrical work have fallen below the standards we would expect.

“We take this extremely seriously, and we have already begun implementing lessons learned from these events.

“This includes a detailed electrical improvements programme and an electrical safety integration programme, designed to deliver company-wide performance improvements.

“We will continue to work closely with ONR to ensure the requirements of the improvement notice are met in full.”