CS201320B1 - Facility for radiation tests in the corrosive medium - Google Patents

Description

The present invention provides a device for radiation testing in a corrosive environment, particularly a water vapor environment.

The development of new materials and evaluations, in particular the corrosion properties of materials used in nuclear technology, presupposes to carry out radiation tests in a pressure superheated steam environment. The realization of tests in pressure superheated steam generally encounters major technical problems. Therefore, very few radiation experiments were performed at higher temperatures. The methodology of these tests consisted of irradiation of samples enclosed in small ampoules filled with water vapor and irradiation of samples in steam loops.

Testing with ampoules is unjustifiable from the viewpoint of the disadvantageous ratio of the volume of the corrosive medium to the surface of the samples and the indefinable composition of the corrosive environment. In such a flow-through arrangement, it is also necessary to take into account the possibility of the formation of an explosive emanation due to radiolysis of the water vapor. Tests in steam loops are very expensive. The construction of equipment for this kind of testing is quite complex and uneconomical.

These drawbacks are largely overcome by the corrosion test device of the present invention. It is based on the fact that it comprises both a storage autoclave located outside the reactor core and a corrosion probe located in the reactor core. Corrosion Outlet Exhaust Pipe It is in the area outside the reactor core

201 J20

201 320 is connected via a radiator and a second control valve to condensate, and / or the corrosion probe piping stage is connected to a storage autoclave via a first control valve in the area outside the reactor core.

The device according to the invention is simpler, more reliable and economically advantageous compared to the previously used devices for radiation testing in a water vapor environment. It permits periodic or continuous removal of radiolytic products, thereby ensuring a stable and definable composition of the corrosion medium and avoiding the formation of an explosive mixture.

The drawing shows schematically exemplary arrangements of the device according to the invention.

The apparatus comprises, on the one hand, a storage autoclave 10, equipped with a pressure gauge 12, a safety valve 13 and a first control valve 11, and, on the other hand, a corrosion probe 20 located in the reactor core 40. The inlet duct 21, connected to the bottom of the corrosion probe 20, is connected in the area outside the core 40 via the first control valve 11 and to the storage autoclave 10. The outlet duct 22 opens just below the wolf of the corrosion probe 20 23 and a second control valve 24 with a condensate collector 30. The condensate condenser 30 is equipped with a shut-off valve 31.

When the storage autoclave 10 is heated to operating temperature, the equilibrium of the saturated water is established. The corrosion probe 20 is heated to a temperature corresponding to the desired exposure temperature of the corrosion samples. Saturated water vapor is passed through the first control valve 11 and the inlet line 21 from the stock autoclave 10 to the corrosion probe 20, where ee overheats to the desired exposure temperature. Since the reservoir autoclave 10 and the corrosion probe 20 form a connected vessel in a given configuration, an equilibrium pressure corresponding to the equilibrium pressure water-saturated water vapor in the reservoir autoclave 10 is established throughout the apparatus. water vapor from the corrosion probe 20 is discharged through the outlet conduit 22, via a condenser 23 and a second control valve 24 to a condensate trap 30. For the exchange of the corrosive environment, only very small water springs or condensation water should be provided. Therefore, there is no disturbance in the equipment balance. Sensitive control of the corrosion medium is achieved by placing the second control valve 24 downstream of the cooler 23. The water supply to the reservoir autoclave 10 can be carried out periodically, e.g. On completion or interruption of the test, the corrosion chamber of the corrosion probe 20 is closed by means of the first control valve 11 and the second control valve 24.

The device according to the invention is intended for radiation testing of materials, especially corrosive in a water vapor environment.

Claims (1)

Apparatus for radiation testing in a corrosive environment, in particular in a water vapor environment, characterized in that it comprises a stock autoclave (10) located outside the reactor core (40) and a corrosion probe (20) located in the reactor core (40), whereas 201 32 (the outlet pipe (22) of the corrosion probe (20) is connected to the condensate collector (30) in the area outside the reactor core (40) via a cooler and a second control valve (24), while the inlet pipe (21) of the corrosion probe (20) 1), in the area outside the reactor core (40), the first regulating valve (11) is connected to the supply autoclave (10).