Leak detection system and inspection method for the system

An inspection method for a leak detection system configured to detect a fluid leak from a fluid line, comprising:

• measuring a second flow rate of a fluid in a leak detection line of the leak detection system by a flow mater, with an on-off valve closed, the on-off valve being attached to the leak detection line;
• and
• determining that the leak detection system has a defect when the second flow rate is out of a predetermined range,
• the leak detection system including:
• the leak detection line coupled to the fluid line extending between a supply valve and a return valve;
• the on-off valve attached to the leak detection line;
• the flow mater configured to measure a flow rate of fluid flowing through the leak detection line;
• and
• an operation controller configured to detect the fluid leak from the fluid line based on a first flow rate measured by the flow mater.

A leak detection system for detecting a fluid leak from a fluid line, comprising:

• a leak detection line coupled to the fluid line extending between a supply valve and a return valve;
• an on-off valve attached to the leak detection line;
• a flow mater configured to measure a flow rate of fluid flowing through the leak detection line;
• an operation controller configured to detect the fluid leak from the fluid line based on a first flow rate measured by the flow mater;
• a drain line communicating with the fluid line and the leak detection line, the drain line being located downstream of the flow mater;
• and
• a drain valve attached to the drain line,
• the operation controller being configured to:
• close the supply valve and the return valve;
• open the on-off valve and the drain valve;
• obtain, from the flow mater, a measured value of a second flow rate of fluid in the leak detection line;
• and
• determine that the leak detection system has a defect when the second flow rate is lower than a predetermined reference value.

A leak detection system for detecting a fluid leak from a fluid line, comprising:

• a leak detection line coupled to the fluid line extending between a supply valve and a return valve;
• an on-off valve attached to the leak detection line;
• a flow mater configured to measure a flow rate of fluid flowing through the leak detection line;
• and
• an operation controller configured to detect the fluid leak from the fluid line based on a first flow rate measured by the flow mater,
• the operation controller being configured to:
• close the on-off valve;
• obtain, from the flow mater, a measured value of a second flow rate of fluid in the leak detection line;
• and
• determine that the leak detection system has a defect when the second flow rate is out of a predetermined range.