Eurotunnel said the sprinkler system had faced extensive testing
A new sprinkler system which will be used to fight fires is set to be installed in the Channel Tunnel.
Eurotunnel has been testing a method of using fine water spray to starve fires of oxygen and prevent them spreading.
Experts said the system had been tested in temperatures equivalent to those created in a fire involving 40 cars.
In 2008 a major fire broke out on a freight train about seven miles from the French entrance. The tunnel was only fully reopened five months later.
Jacques Gounon, the chairman and chief executive of Groupe Eurotunnel, said: "Safety is the number one priority at Eurotunnel."