There have been 266 fires on Royal Navy nuclear submarines in the past 25 years.
The incidents included 74 on ballistic missile submarines.
Three of the fires happened while the vessels were in naval bases, one of them on a ballistic missile submarine.
Peter Luff, Minister for Defence Equipment, Support and Technology, gave the figures in response to a parliamentary question by SNP defence spokesman Angus Robertson.
Mr Robertson said the ‘apparent vulnerability’ to fires on these vessels raises ‘grave questions’ for UK ministers.