Abstract

The flow of a condensable gas, such as steam, can be measured with noncondensable krypton-85 tracer by a modification of the total-count method. A noncondensable carrier gas is added to a sample stream just ahead of a condenser which removes the condensable gas. The carrier gas then carries the tracer through a counting chamber. From the known rate of flow of the carrier gas, the measured rate of collection of condensate and the total counts registered by a Geiger-Müller counter sensitive to krypton-85 beta rays, the condensable gas flow rate may be calculated. The method was successfully tested on high pressure steam flows.

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