FIELD: mechanical engineering.
SUBSTANCE: method for controlling impermeability of devices by liquid hydrogen includes filling of hollow being controlled with liquid hydrogen cleaned from mechanical admixtures by filtration. Also, excessive pressure is formed in hollow of device filled with hydrogen and leak of liquid hydrogen through leak is measured. Prior to filtration liquid hydrogen is cleaned from solid dissolved admixtures by, for example, adsorption.
EFFECT: increased reliability of leak detection and increased precision when measuring value of loss of liquid hydrogen.
2 tbl
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