A sample changing device for k-boundary density meter

Abstract

The invention belongs to the technical field of radioactive nondestructive analysis and particularly relates to a sample replacing device for a K boundary densimeter. The sample replacing device comprises a sample box, a sample frame and a sample replacing frame, wherein a sample tank is arranged in the sample box; two positioning pins are arranged on the outer side of the bottom of the sample box; the sample frame is of a cubic structure and is mainly composed of a positioning plate at the bottom and reversed U-shaped pressing grooves, spring guide columns and end caps on two sides; the positioning plate is provided with sample grooves; a cubic cavity is formed between the reversed U-shaped pressing grooves and the positioning plate; the spring guide columns are located in the cavity and are parallel to the positioning plate; spring ends of the spring guide columns are fixed on the end cap at one end of the cubic cavity; an end cap at one end of a stainless steel guide column is provided with a channel through which the stainless steel guide column passes; the positioning plate, the spring guide columns and the U-shaped pressing grooves are provided with grooves corresponding to the positioning pins of the sample box; and the sample replacing frame is of a cubic structure and is used for storing the sample frame. The device has the advantages that a sample can be rapidly replaced and does not easily scatter and the operation is convenient to carry out by a mechanical arm.

Description

technical field [0001] The invention belongs to the technical field of radioactive nondestructive analysis, and in particular relates to a sample changing device for a K boundary density meter. Background technique [0002] The K boundary density meter is used for the determination of spent fuel reprocessing process parameters and the monitoring of the process. It can measure the concentration of uranium and plutonium elements in the reprocessing process. For typical spent fuel reprocessing solutions (U concentration is 50-300g / L ) measurement accuracy can reach 0.3% -0.7%. The advantage of this technique is that it can directly measure 13 Bq / l or more) post-treatment solution, a large throughput without generating secondary waste. [0003] The measurement process of the K boundary density meter can be simply summarized as: the cycle process of sampling-transportation-measurement-replacement. Traditional K boundary densitometers are mostly scientific research prototypes a...

AI Technical Summary

Problems solved by technology

Traditional K boundary densitometers are mostly scientific research prototypes and prototype devices. The sample boxes equipped with them have a simple structure, and the sample cells used for K boundary absorption and X fluorescence analysis are independent of each other and small in size, and sampling is achieved by manual operation. and sample change process, but because the measurement object of the K boundary density meter is a strong radioactive post-processing solution, there is a risk of radioactive contamination and radioactive radiation to personnel

In industrial applications, it is necessary to use a manipulator to put the sample box into the sample chamber of the density meter in a thick shielding body. If the traditional independent sample box structure is still used, use the manipulator to put each sample box into the sample chamber separately. , the operation of the manipulator is quite difficult, and it is very easy to cause the spent fuel reprocessing liquid to be scattered, resulting in serious pollution of the hot cell, manipulator and K boundary density meter.

When the concentration of a batch of samples is measured, the manipulator needs to grab each sample box separately for sample replacement, which makes it easier to dump or scatter the samples

Images