| 摘要 |
PROBLEM TO BE SOLVED: To enable an infinitesimal leakage content of a cooling medium to be accurately sensed by being not liable to effect an influence of a temperature difference, an instrument error or the like to the medium. SOLUTION: A method for sensing the leakage of the cooling medium comprises the steps of detecting flow rates A and B of cooling water or the like at an inlet and an outlet of a flow passage by detectors 1 and 2, respectively, storing a difference of both the rates A and B obtained by an arithmetic unit 3 as an initial differential flow rate D, further obtaining a value obtained by multiplying the change amount (C-D) of the differential flow rate C from the rate D by a predetermined valueαby an arithmetic unit 6, and monitoring the value to enable the value to be sensed and monitored with a small influence of the temperature difference, instrument error or the like.
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