The Atomic Weapons Establishment is due at Reading Magistrates Court later over a fire at its site at Aldermaston in Berkshire.
A worker received burns when the blaze broke out in August 2010. The company faces three charges brought by the Health and Safety Executive.
More top news
Friday's lunch time weather for the west of the region
Friday's pollen count with Amanda Houston
Friday's lunch time weather for the east of the region