ANORDNING FOER MATARVATTENROER VID EN KAERNKRAFTREAKTOR

摘要

The invention relates to an arrangement for feed-water pipes 5 in a nuclear power reactor, the reactor tank 3 of which is enclosed in a biological shield 2, through which the feed-water pipe 5 is guided via a through-duct 7 into the reactor tank 3. The biological shield 2 is, on the inside, provided with a number of first cooling-air ducts 14 and the inside of the through-duct 7 is covered with a liner pipe 10 made of steel plate or the like. According to the invention, a second cooling-air duct 16 has been arranged around said liner pipe 10 at its inner end facing the reactor tank 3, and the liner pipe 10 has been provided with cooling flanges 17 which project into said second cooling-air duct 16. This second cooling-air duct 16 has been connected to at least one of said first cooling-air ducts 14. IMAGE