Sampling device for the analysis of a fluid
AssigneeCommissariat a l'Energie Atomique
InventorRene Donguy
Life of this patent
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Abstract
A sample of hot fluid under pressure circulating in a main circuit is admitted into a cavity formed within a sampling unit. The temperature and pressure of the fluid within the cavity are brought to the same conditions as in the main circuit and the cavity is then isolated after thermal stabilization of the main circuit. The sampling unit is isolated, then cooled in order to reduce the pressure within the cavity. A supporting shield which normally covers a thin window formed in the bottom cavity wall is withdrawn by sliding and the fluid is analyzed across the window.
Claims13
A method of sampling fluid circulating in a main circuit, said method comprising the steps of withdrawing a sample of said fluid from said main circuit and introducing said sample into a cavity which is heated in order to bring the conditions of temperature and pressure of the fluid within the cavity to the same values as in the main circuit, allowing said fluid to thermally stabilize, isolating said cavity from said main circuit after thermal stabilization, cooling said sampling unit after isolation, reducing the thickness of one of the walls defining said cavity to a thin window, and analyzing the fluid across said window.
A device for sampling fluid, comprising means defining a cavity, an inlet pipe and an outlet pipe connecting said cavity to a source of said fluid, control valves associated with said pipes for selectively controlling the flow of fluid into and from said cavity, means for controlling the temperature of the fluid within said cavity, said cavity defining means including a window for permitting the fluid in said housing to be analyzed by an external system, and shield means movable relative to said window between a first position in which it shields said cavity from said system and a second position in which it uncovers said window to permit analysis of said fluid by said system.
Dependencies are inferred from the claim text.