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Sodium-cooled fast reactor entrainment phenomenon out-of-pile visualization experiment system and experiment method

An entrainment phenomenon, sodium-cooled fast reactor technology, applied in the field of sodium-cooled fast reactor safety research, to achieve the effect of saving experimental costs and reducing experimental land

Active Publication Date: 2021-09-03
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Based on this requirement, the present invention provides a visual experimental system for the entrainment phenomenon outside the heap. Many types of entrainment phenomena can be simulated under certain conditions for the difficulty of visual study

Method used

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  • Sodium-cooled fast reactor entrainment phenomenon out-of-pile visualization experiment system and experiment method
  • Sodium-cooled fast reactor entrainment phenomenon out-of-pile visualization experiment system and experiment method
  • Sodium-cooled fast reactor entrainment phenomenon out-of-pile visualization experiment system and experiment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] refer to figure 1 As shown in Fig. 2, the water supply pump 9 and the water diversion pump 6 are respectively adjusted so that the water level in the entrainment experimental device 1 is higher than the outlet window 18 and maintained at a relatively large flow rate. At this time, the water entering the entrainment experimental device 1 from the horizontal inlet section 17 is On the round tube 12 and rolled up, then fall back to entrain the gas. The whole process simulates the liquid entrainment phenomenon that may occur in the fast reactor.

Embodiment 2

[0029] refer to figure 1 As shown in Fig. 2, on the basis of the first embodiment, a detachable guide plate 16 is added between the circular tube 12 and the horizontal inlet section 17 to simulate the entrainment phenomenon of liquid falling back under different incident angles.

Embodiment 3

[0031] refer to figure 1 As shown in Fig. 2, the water feed pump 9 and the water diversion pump 6 are respectively adjusted so that the water level in the entrainment test device 1 is kept at a relatively large flow after being much higher than the outlet window 18. At this time, the liquid level in the entrainment test device 1 is at the level of the water diversion pump 6 The suction action is inclined towards the outlet window 18, and even the phenomenon that the gas is directly sucked into the outlet window 18 occurs. At this time, the drainage entrainment phenomenon that may occur in the sodium-cooled fast reactor is simulated.

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Abstract

The invention provides a sodium-cooled fast reactor entrainment phenomenon out-of-pile visualization experiment system and an experiment method. The system comprises an entrainment experiment device, a water tank, a water feeding pump, a water diversion pump, a flow meter, a plurality of valves and a connecting pipeline, wherein the entrainment experiment device is a hollow container formed by windows at two sides and front and rear frame-shaped rib plates; a horizontal inlet section is arranged on the side face of the bottom of one end of the entrainment experiment device and a water discharging opening is formed in the bottom of the other end of the entrainment experiment device; a round pipe is arranged in the entrainment experiment device and is divided into upper and lower sections at a pre-set position through an outlet window; the lower half section is connected with an outlet pipeline; a vertical baffle is arranged between the round pipe and the water discharging opening; a detachable guide plate is arranged between the round pipe and the horizontal inlet section; the entrainment experiment device is connected with the water tank through a water feeding pipeline, a water returning pipeline and a water discharging pipeline respectively; the water feeding pump and the water diversion pump are arranged on the water feeding pipeline and the water returning pipeline respectively; and the water returning pipeline is provided with a bypass. The experiment system provided by the invention can be used for simulating a plurality of types of entrainment phenomena which possibly occur in a sodium-cooled fast reactor and can be used for visually researching a liquid level entrainment phenomenon generation criterion and thermal hydraulic properties of a sodium tank of the fast reactor, so as to reveal an entrainment mechanism.

Description

technical field [0001] The invention belongs to the field of safety research of sodium-cooled fast reactors, and in particular relates to an external visualization experiment system and an experiment method of the entrainment phenomenon of sodium-cooled fast reactors. [0002] technical background [0003] Sodium-cooled fast reactor is one of the most promising reactor types among the fourth-generation reactors, and has attracted the attention of institutions and researchers in various countries. Due to the use of active sodium as the coolant, it is necessary to cover all the positions of the sodium-cooled fast reactor system containing the free liquid surface with inert gas. However, the compact structure of the sodium-cooled fast reactor causes the coolant to have a high flow rate, and the phenomenon of liquid entrainment bubbles occurs at the gas-liquid interface, which will not only introduce positive cavitation reactivity into the core, resulting in core power fluctuatio...

Claims

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Application Information

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IPC IPC(8): F04B51/00F04B53/10F04B53/16F04B23/04G21C17/00
CPCF04B51/00F04B53/10F04B53/16F04B23/04G21C17/001Y02E30/30
Inventor 巫英伟姚灏苏光辉田文喜秋穗正
Owner XI AN JIAOTONG UNIV
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