Injection system and associated operating method
AssigneeAreva Np
InventorJohann Meseth
Life of this patent
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Abstract
A feeding system for an absorber liquid containing a neutron poison, in particular for a quick shut-down of a nuclear reactor, has a storage container for the absorber liquid and is configured for high operational reliability with simple construction. In particular, a chemical decomposition of the absorber liquid or corrosion of the container wall of the storage container is to be excluded. For this purpose, the storage container is connected to a pressure container via an overflow line, wherein the pressure container is filled with a motive fluid.
Claims5
A method for making an absorber liquid available in an injection system, which comprises:
- providing an injection system with a reservoir vessel storing the absorber liquid under an operating pressure, a pressure vessel partially filled with a propelling fluid and an overflow line, the reservoir vessel for the absorber liquid being connected, via the overflow line, to the pressure vessel, the overflow line equalizing a pressure in the pressure vessel with the operating pressure in the reservoir vessel;
- and
- heating the propelling fluid such that the propelling fluid is stored during a storage period in a lower region of the pressure vessel in liquid form and in that, above it, a vapor cushion which forms by way of evaporation of the propelling fluid is maintained, thereby generating the operating pressure in the pressure vessel;
- wherein the pressure vessel is separate from and does not include a primary cooling circuit that cools a boiling-water nuclear power plant.
A method for injecting an absorber liquid into a component of a plant connected downstream of a reservoir vessel, the method which comprises:
- providing an injection system including the reservoir vessel storing the absorber liquid under an operating pressure, a pressure vessel partially filled with a propelling fluid and an overflow line, the reservoir vessel connected via the overflow line to the pressure vessel, the overflow line equalizing a pressure in the pressure vessel with the operating pressure in the reservoir vessel;
- heating the propelling fluid such that the propelling fluid is stored during a storage period in a lower region of the pressure vessel in liquid form and in that, above it, a vapor cushion which forms by way of evaporation of the propelling fluid is maintained;
- and
- introducing first the propelling fluid in a liquid form and then second the propelling fluid in a vaporous form from the pressure vessel into the reservoir vessel, with the absorber liquid in the reservoir vessel being displaced;
- wherein the pressure vessel is separate from and does not include a primary cooling circuit that cools the plant and the plant is a boiling-water nuclear power plant.
Dependencies are inferred from the claim text.