Tritium-containing heavy water conveying device

Abstract

The invention discloses a tritium-containing heavy water conveying device which comprises a high-pressure gas cylinder. The high-pressure gas cylinder is connected with a heavy water collecting tank through a purging pipeline; an outlet of the high-pressure gas cylinder is connected with a pressure reducing valve; an inlet of the heavy water collecting tank is connected with a purging valve; the heavy water collecting tank is connected with an exhaust valve; an outlet of the heavy water collecting tank is connected with a special drainage connector of a heavy water bucket through a drainage valve and a drainage pipeline; the special drainage connector is connected with the heavy water bucket and connected with an exhaust connector through an exhaust pipeline; and the exhaust connector is located in an exhaust container. The tritium-containing heavy water conveying device provided by the invention has the beneficial effects of being safe and reliable in structure, convenient to use, practical, capable of achieving whole-process closed transmission, reducing operation cost, avoiding pollution to plants and the environment, ensuring radiation safety of workers and meeting the use requirement of a power station in the whole service life.

Description

technical field [0001] The invention belongs to a device for a heavy water reactor nuclear power plant, in particular to a transmission device for tritium-containing heavy water. Background technique [0002] One of the biggest features of heavy water reactor nuclear power units is non-stop refueling, which is basically 4 days a week. During the unloading process at the end of each refueling, the heavy water leaking from the internal seal of the loading and unloading machine will follow the spent fuel bundles It flows out of the loading and unloading machine, and flows into the ground of the unloading plant and the unloading pool, causing heavy water loss and plant pollution. Since heavy water is quite expensive, in order to protect the environment and reduce operating costs, the tritium-containing heavy water leaked from the unloading plant is collected and recycled by manufacturing heavy water collection tanks. According to statistics, each unit can collect about 400L of ...

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Problems solved by technology

[0003] Due to the special structure, unevenness and heavy pollution of the unloading plant, the tritium-containing heavy water collected by the heavy water collection tank cannot be directly transferred by trolley or crane. If manual drainage is adopted, the tritium in the heavy water will spread to the entire unloading plant , not only the workload is heavy and the dose is high, but it will also have a great impact on the staff and the environment

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