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Safety performance
International Safety Rating System
ISRS is a well established, comprehensive independent audit of safety management performance based on 20 classes of activity. It is used to benchmark standards at around 6,000 industrial sites worldwide. UKAEA sites are all in the top 10% of audited units in the UK, a reflection of our stringent safety practices.
Safety Events
The number of safety events that affected people, equipment, materials or the environment across our sites in 2006/07 decreased to the lowest number since the system was introduced around a decade ago.
International Nuclear Event Scale (INES)
INES is a worldwide system for classifying safety incidents involving nuclear plant. Devised by the International Atomic Energy Agency, it is managed in the UK by the Nuclear Installations Inspectorate. The scale moves from 1 ("anomaly) to 7 ("major accident"). UKAEA uses the scale to compare its safety performance against other nuclear companies. Nearly all safety events at our sites fall below the INES scale. In 2006/07 we recorded one Level 1 INES event.
Reportable Injuries Incidence Rate (RIDDOR)
The RIDDOR measure is used to monitor injuries that result in employees being unable to complete their normal work for more than three days. UKAEA's 2006/07 performance compares well not just within the nuclear industry but, as the graph shows, with other industrial sectors. The figures show the rate per 100,000 employees. (UKAEA data is for the 2006/07 financial year, comparative data is for the 2006 calendar year.)
Lost Time Accident rate
The company's Lost Time Accident frequency rate is consistently low. In 2006/07, the rate was 0.19 per 100,000 hours worked.
Radiation doses to employees
The total radiation dose to people working for UKAEA in 2006 was very low. No employee received a dose greater than 3.56mSv. The average dose received by employees was 0.10mSv, equivalent to 3.7% of the average background radioactive dose received by all members of the public.
Nuclear material unaccounted for (MUF)
The annual nuclear material unaccounted for figures for 2005/06 gave no cause for concern over the safety and security of UKAEA nuclear plant.
