Below you will find details of operational issues and events.
Sellafield incident report – water leak – 01 March 2018
Due to freezing temperatures at the beginning of March, there was a water leak from a water pipe on an elevated pipebridge on the Sellafield site.
As a result, water ran into nearby pipe trenches below ground level.
The volume of water resulted in a discharge through a number of non-routine routes, including a leakage to ground. The water carried very low concentrations of radioactive contamination.
The water was removed and safely disposed of via our robust processes. A management investigation has been carried out to understand the root cause and identify learning from the event.
There were no safety implications for the workforce or the general public.
The event carries an International Nuclear International Event Scale Level 1 rating (an anomaly) based on ‘minor problems with safety components with significant defence in depth remaining.’
Sellafield incident report - powder spillage - 15 January 2018
During routine sampling work in a Sellafield drum filling area, a bottle containing uranium trioxide powder accidentally fell to the floor causing approximately 100-150g to spill out.
The operator handling the samples was wearing the correct personal protective equipment and the correct safety procedures were followed.
There was no personal contamination or ingestion by the operator and the contamination was contained in the immediate work area. An investigation has been carried out, and we are now considering the actions required to address the findings.
The event has been rated 0 (anomaly) on the International Nuclear Events Scale.
Level 1 represents the lowest severity, known as ‘anomaly’, rising to Level 7: ‘major incident’.
Sellafield incident report - personnel contamination event - 28 November 2017
An employee was contaminated during operations in one of our analytical laboratories at Sellafield.
This was identified following routine internal dosimetry monitoring tests which are carried out on our nuclear workers.
An assessment confirmed that the radiation dose received was significantly less than the annual limit allowed for an individual.
The employee suffered no ill effects and did not require any time off work.
Sellafield incident report - powder spillage - 14 June 2017
While carrying out analysis work in a Sellafield site laboratory, a worker spilled approximately 1kg of depleted uranium trioxide powder while moving a container.
The material is not harmful unless ingested or inhaled.
The correct safety procedures were followed and the immediate area was evacuated before returning to normal service on the same day.
Health checks confirmed the worker suffered no ill effects.
An internal investigation is being carried out.
Sellafield is regulated by the Office for Nuclear Regulation and the Environment Agency.
Some of these reports are graded using the International Nuclear and Radiological Event Scale (INES).
See details of incidents at Sellafield before 1 August 2017