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Water boiler solution nuclear reactor having inherent security

A safety and reactor technology, applied in the direction of nuclear reactors, uniform reactors, reactors, etc., can solve the problems of low production capacity and only reactor power, and achieve the effect of meeting market needs, considerable social benefits, and good application prospects

Active Publication Date: 2007-07-04
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the stack has inherent safety, the stack power is only 20kW, and the production capacity is low. To increase the production capacity, the stack power must be increased so that the stack has both inherent safety and high stack power.
At present, there are no relevant reports on solution reactors with a reactor power greater than 100kW and inherent safety at home and abroad.

Method used

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  • Water boiler solution nuclear reactor having inherent security
  • Water boiler solution nuclear reactor having inherent security

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] As shown in Figure 1, a flat-bottomed cylindrical core structure is adopted, and the core liquid does not contain combustible neutron poison Gd-155. Enriched uranium UO 2 (NO 3 ) 2 Solution or UO 2 SO 4 The solution is placed in the core vessel 2, the diameter (inner diameter) of the core is 70cm, the height of the core vessel is about 70cm, the height of the core solution is 25-32cm (varies with the concentration of uranium in the solution), and the core material liquid is divided into inner and outer areas radially 3-6 control rod conduits 4 are arranged in one inner area without cooling tubes, the control rod conduits 4 are sealed and welded with the upper cover and lower bottom of the core vessel 2, the inside of the control rod conduits 4 is cooling water, and the outside of the control rod conduits 4 is connected with the fuel solution For contact, the outer area of ​​the core material liquid radial direction is arranged with a cooling pipe fuel inner area 3, ...

Embodiment 2

[0030] As shown in Figure 1, a flat-bottomed cylindrical core structure is adopted, and an appropriate combustible neutron poison Gd-155 (expressed as Gd(NO 3 ) 3 form).

[0031] The core structure is the same as that of embodiment 1, only at UO 2 (NO 3 ) 2 Gadolinium-155 was added. Core design calculation result K eff See Table 2 for the change with the concentration of uranium in the solution, K eff The maximum point corresponds to a uranium concentration of 52gU / L, the operating point of the reactor can be selected at 46gU / L, the corresponding solution volume is 122.3L, and the amount of Gd-155 is 9.13g. Uniform fuel consumption at full power operation at a concentration of 46gU / L, K eff See Table 3 for the change with fuel consumption.

[0032] Numbering

[0033] EFPD

Embodiment 3

[0035] As shown in Figure 2, the cylindrical core structure with dish bottom does not contain combustible neutron poison Gd-155 in the core feed liquid.

[0036] The core structure is basically the same as in Example 1, except that the bottom of the core is changed from a flat bottom to a dish bottom. The bottom R of the dish is 630mm, the r is 63mm, the dish height is 142mm, and the dish volume is 33.70L. The height of the core solution is 21.4-30.5cm (varies with the concentration of uranium in the solution), the initial loading of uranium-235 is 3.00kg, and the enrichment degree of uranium-235 is 90%. Core design calculation result K eff See Table 4 for the change with the concentration of uranium in the solution, K eff The maximum point corresponds to a uranium concentration of 44gU / L, and the operating point of the stack can be selected at 36gU / L, corresponding to a solution volume of 95L. To achieve 100L, the core diameter must be increased.

[0037] Number...

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Abstract

The invention discloses a water-boiler solution-type reactor with fixed security, the concentrated UO2(NO3)2 solution or UO2SO4 solution is as the nuclear fuel, the flat in-core structure is adopted, the ratio of in-core solution height to in-core diameter is 0.3-0.8, when the ratio of volume to power is maintained at 2.0-2.5kW / L, the volume of the in-core solution can achieve 50-200L, the power of heap is bigger than 100kW.

Description

technical field [0001] The invention relates to a "water boiler" solution nuclear reactor, in particular to a "water boiler" solution nuclear reactor with inherent safety. Background technique [0002] The homogeneous solution nuclear reactor using uranium brine solution as nuclear fuel is also called "water boiler" reactor. It is characterized in that the fuel solution transfers the fission heat to the cooling pipe or the cooling wall by convection through natural convection of the fuel solution (including the disturbance of the rising air flow). [0003] This "water boiler" reactor concept was first proposed in the world in 1943, and a Lopo (zero power) reactor fueled by uranyl sulfate aqueous solution was built in Los.Alamos National Laboratory in the United States in 1944. It provides not only critical mass data but also manipulation and control experience. [0004] In December 1944, the Hypo reactor with power operation was built. Based on the Lopo reactor, the fuel w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C1/24G21C5/16G21C3/46
CPCY02E30/38Y02E30/30
Inventor 吴英华李茂良王英明芦伟洪永汉李映发傅蓉
Owner NUCLEAR POWER INSTITUTE OF CHINA
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