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Low-temp nuclear reactor with dead fuel for nuclear power station

A nuclear reactor and spent fuel technology, applied in the direction of reactor fuel materials, nuclear power generation, reduction of greenhouse gases, etc., can solve the problems of economy and safety that are not widely accepted, and achieve increased backup reactivity, reduced investment and operating costs, The effect of improving the utilization value

Inactive Publication Date: 2002-06-26
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many conceptual designs of low-temperature heating nuclear reactors at home and abroad, but they have not been widely accepted due to economic and safety constraints. Therefore, it is the key to determine the promotion of nuclear energy heating reactors to seek a low-cost, safe and reliable reactor type.

Method used

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  • Low-temp nuclear reactor with dead fuel for nuclear power station
  • Low-temp nuclear reactor with dead fuel for nuclear power station
  • Low-temp nuclear reactor with dead fuel for nuclear power station

Examples

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Embodiment 1

[0023] The present invention takes a heat supply pile with a thermal power of 200 megawatts as an example, and its structure is as follows: figure 1 , figure 2 , image 3 shown. A core pool 17 and a spent fuel storage pool 19 surrounded by a concrete biological shielding layer 16, the diameter of the core pool 17 is 7 meters, the water depth is 14 meters, and the thickness of the shielding layer is 1.5 meters; the width × length of the spent fuel storage pool 19 is About 5 meters x 9 meters, the water depth is 13 meters. A water channel 18 is provided on the side of the stack pool 17 to communicate with the spent fuel storage pool 19, and the spent fuel storage pool 19 can place spent fuel transport containers and spent fuel assembly storage racks. The concrete biological shielding layer 16 and the shielding layer of the spent fuel storage pool 19 are covered with stainless steel to ensure that the water pool 17 is watertight. The core of the reactor is composed of a lowe...

Embodiment 2

[0025] The difference from embodiment 1 is that the fuel assembly of the reactor core is unirradiated "fresh" fuel assembly as the reactor fuel, and one or two gas sealing shields are used on the upper part of the water pool. Since the upper part of the core water pool adopts double sealing and shielding, the first sealing and shielding can ensure that when the fuel element is damaged, the radioactive material is contained in the sealing and shielding. If it is charged with a certain pressure of gas, the subcooling degree of the coolant can also be improved so that the depth of the pool can be less than 15 meters. Therefore, this reactor has the main characteristics of both pool and shell reactors, and its water supply temperature is high while avoiding the release of radioactive gases to the environment. This makes the reactor a safe reactor type with "no radioactive environmental consequences". The seawater desalination plant is built along the coast, and the pool should no...

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Abstract

A low-temp. nuclear reactor using depleted fuel for nuclear power station is disclosed. The reactor core is in a water tank. A depleled fuel package without any processing is used for the reactor core. The sealing cover of the water tank for the said core has at least one air-tight shielding and is filled with gas under a certain pressure. A water channel is arranged between two water tanks respectively for reactor core and depleted fuel. Its advantages include raised utilization value of uranium resource, high environemnt protection effect, low cost, and high safety.

Description

technical field [0001] The invention relates to a low-temperature nuclear reactor, in particular to a low-temperature nuclear reactor using nuclear power plant spent fuel as fuel. Background technique [0002] Generally, about 1% of uranium-235, about 0.5% of plutonium-239 and about 1‰ of plutonium-241 fissionable material remain in the spent fuel assembly of nuclear power plant pressurized water reactor. In order to make full use of this resource, there are currently two ways in the world : One is to extract usable uranium and plutonium after reprocessing; the other is to reprocess spent fuel from pressurized water reactor nuclear power plants into fuel elements that can be used in heavy water reactor nuclear power plants. The use of nuclear energy for heating is a major means of solving energy problems. The currently designed and constructed cryogenic reactors can be divided into two types, one is the shell-type pressurized type, such as the natural ...

Claims

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Application Information

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IPC IPC(8): G21C3/42
CPCY02E30/38Y02E30/30
Inventor 李玉仑马福邦吴英华
Owner NUCLEAR POWER INSTITUTE OF CHINA
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