公开(公告)号：US11802688B2

公开(公告)日：2023-10-31

申请号：US16755663

申请日：2018-07-25

Applicant: MITSUBISHI HITACHI POWER SYSTEMS, LTD.

Inventor： Haruka Kido ,  Akihiro Hamasaki ,  Masato Kanedome

IPC: F22B37/38 ,  F22B37/42 ,  F01K13/00 ,  F22B37/02 ,  C02F1/00 ,  F22B37/22

CPC classification number: F22B37/421 ,  F01K13/003 ,  F22B37/025 ,  F22B37/38 ,  C02F1/00 ,  F22B37/228 ,  F22B37/42

Abstract: In a seawater leakage detection device in a feedwater system, a method for detecting seawater leakage in a feedwater system, and a steam turbine plant, an ammonia addition device configured to add ammonia as a pH adjusting agent to feedwater at an upstream side of a high-pressure drum in a feedwater line, an acid electrical conductivity meter configured to measure an acid electrical conductivity of drum water in the high-pressure drum, and a control device configured to control the ammonia addition device such that a pH value of drum water in the heat recovery steam generator expresses alkalinity equal to or greater than a preset predetermined value, calculate a chlorine ion concentration of drum water on the basis of the acid electrical conductivity measured by the acid electrical conductivity meter, and determine whether leakage of seawater is detected are provided.