Method for processing radioactive wastes

A treatment method and waste technology, which is applied in the field of radioactive waste treatment, can solve the problems of high storage cost, increased nuclide scattering, and large storage space, and achieve the effect of small thermal inertia and reduced storage space

Active Publication Date: 2011-09-28
HUANCHUANG XIAMEN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the cement solidification method, the radioactive waste is directly compressed and sealed with cement, and its volume expansion ratio even reaches 1:6.6. Not only the storage cost is high, the storage space is large, but also the funds and storage space are limited. challenge
For the plasma incineration method, after incinerating and filtering the radioactive waste, although the storage space can be alleviated to a large extent, and the storage cost will be reduced accordingly, but because the structure of the current incineration method is very large, in addition to the high investment inten

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0029] Example 1: Apply this method to weigh and measure the volume of absorbent paper before the test. They are recorded as M1 and m1, and are dried and carbonized by microwave heating. The weight and volume are measured and recorded as M2 and m2. , And the hot gas is subjected to rapid extraction and two filtrations. The condition of rapid extraction is to rapidly drop the temperature of the hot gas from 120°C to below 17°C within 1 min. After passing the inspection, exhaust the exhaust gas. The temperature control system can automatically cut off the heating power according to the set value and feed back the computer's drying and carbonization end information. The test results show that the weight reduction rate (M1-M2) / M1>87% and volume reduction rate (m1-m2) / m1>52% of the absorbent paper treated by this method, and the exhaust gas detection meets the national emission standards.

Example Embodiment

[0030] Example 2: Applying this method to dry and carbonize work clothes before weighing their weight and measuring their volume, respectively denoted as M1 and m1, using microwave heating to dry and carbonize, weighing their weight and measuring their volume, respectively denoting M2 and m2, The hot gas is rapidly extracted and filtered twice. The condition for rapid extraction is to rapidly drop the temperature of the hot gas from 120°C to below 17°C within 1 min. After passing the inspection, exhaust the exhaust gas. The temperature control system can automatically cut off the heating power according to the set value and feed back the computer's drying and carbonization end information. The test results show that the weight reduction rate (M1-M2) / M1>95% and the volume reduction rate (m1-m2) / m1>65% after the treatment by this method, and reach the emission standard.

Example Embodiment

[0031] Example 3: Apply this method to weigh the sludge before drying and measure its volume, which are recorded as M1 and m1, and use microwave heating to dry, weigh and measure its volume, which are recorded as M2 and m2, respectively, and the hot gas After rapid extraction and two filtrations, the condition for rapid extraction is to rapidly drop the temperature of the hot gas from 120°C to below 17°C within 1 min. After passing the inspection, exhaust the exhaust gas. The temperature control system can automatically cut off the heating power according to the set value and feed back the computer's drying and carbonization end information. The test results show that the weight reduction rate (M1-M2) / M1>51% and the volume reduction rate (m1-m2) / m1>41% after the treatment by this method, and reach the emission standard.

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PUM

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Abstract

The invention relates to a method for processing radioactive wastes, which comprises the following steps of: 1) heating the radioactive wastes to obtain hot gas with trace 134Cs or 137Cs nuclide and dehydrated or carbonized solid wastes, encapsulating the dehydrated or carbonized solid wastes by a nuclear waste processing container or cement, and carrying out step 2) to the hot gas with individual trace nuclide; and 2) quenching and extracting the hot gas with individual trace nuclide. The invention provides a method for processing radioactive wastes, which is capable of manufacturing a movable processing device, reduces storage space and avoids heavy pollution to the environment and is low in storage cost.

Description

technical field [0001] The invention relates to a treatment method for waste, in particular to a treatment method for radioactive waste. Background technique [0002] As an efficient and clean energy, nuclear power has been increasingly valued and utilized by people. As of 2010, there were 13 nuclear power units in operation in mainland my country, and 24 units under construction will also be put into commercial operation successively. While nuclear power brings huge economic benefits to people, the technological wastes and technical wastes produced during the working process have a certain specific activity of radioactivity, and must be treated with certain technical measures before storage. , the radioactive pollution caused by natural or man-made damage such as earthquakes and terrorist attacks will bring disastrous consequences to people. At present, cement solidification or plasma incineration are usually used to treat these radioactive wastes. For the cement solidifi...

Claims

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Application Information

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IPC IPC(8): G21F9/06G21F9/08G21F9/30
Inventor 张喜华王武尚秋实张德志师全林何文新
Owner HUANCHUANG XIAMEN TECH
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