Plant with piping mounted on branch pipe and boiling water reactor plant

摘要

A plant with piping mounted on branch pipe,
wherein said piping which introduces gas has a nozzle portion as a joint portion to a vessel and a branch portion connected with a branch pipe; and wherein an enlarged passage portion is formed at least at one of said branch portion and said nozzle portion, and a passage sectional area of said enlarged passage portion is larger than that of said piping other than said enlarged passage portion. Since the flow velocity of the gas flowing inside slows down at the enlarged passage portion, the occurrence of acoustic resonance at the branch portion or the nozzle portion can be suppressed. Accordingly, the fluctuation pressure of the gas flowing in the piping can be reduced even more.

主权项

1. A plant with piping,
wherein said piping includes a main pipe connected to a turbine and which introduces steam to said turbine, said main pipe having a nozzle portion as a joint portion to a vessel and a branch portion of said main pipe connected with a branch pipe having a steam safety relief valve attached thereto, said branch pipe being said branch portion of said main pipe extended from said main pipe; and wherein an enlarged passage portion of said main pipe is formed at said branch portion of said main pipe at the connection with said branch pipe having said steam safety relief valve attached thereto and which extends from said main pipe, and a passage sectional area of said enlarged passage portion of said main pipe at said branch portion is larger than a passage sectional area of said main pipe at an upstream side and at a downstream side of said enlarged passage portion of said main pipe, and said branch pipe having said steam safety relief valve attached thereto and which extends from said main pipe is connected to said enlarged passage portion of said main pipe at said branch portion of said main pipe.