CN110941008A

CN110941008A - Portable detection device for α and β surface pollution meters

Info

Publication number: CN110941008A
Application number: CN201911300705.4A
Authority: CN
Inventors: 姚艳玲; 张路明; 姚顺和; 朱保吉
Original assignee: China Institute of Atomic of Energy
Current assignee: China Institute of Atomic of Energy
Priority date: 2019-12-17
Filing date: 2019-12-17
Publication date: 2020-03-31

Abstract

The invention relates to a portable detecting device for α and β surface pollution meters, which comprises a fixed frame base and a probe fixed frame, wherein a plane source groove and a fixed upright post on the edge are arranged on the fixed frame base, a measuring window matched with the plane source groove is arranged on the probe fixed frame, and the probe fixed frame is sleeved on the fixed upright post on the edge of the fixed base through a through hole so as to enable the distance between the probe detecting window of the surface pollution meter and the surface of the plane source to accord with a preset value.

Description

Portable detection device for α and β surface pollution meters

Technical Field

The invention belongs to the field of nuclear industry, and particularly relates to a portable calibration device for α and β surface pollution meters.

Background

α, β surface contamination meters are one of the most widely used nuclear monitoring instruments, and Calibration/verification of surface contamination meters is a necessary condition for their use, Calibration/verification of surface contamination meters is carried out according to verification procedures or related standards, mainly domestic jjjg 2041-89 "metrology instrument verification system for measuring α, β surface contamination" and jg 478-2016 "α, β surface contamination meter verification procedures", international Reference is made mainly to ISO 8769 "Reference sources-Calibration of surface contamination meters-Alpha-, a-and phosphor detectors" or IEC 60325 "radiological protection analysis-Alpha", beta an/beta (keV energy > 60) Calibration meters and detectors ", however these standards or standards only give necessary Calibration/verification methods and some standard sources, and no specific radiation sources/beta sources are given as well as specific Calibration/Calibration devices, and no more than standard deviation is given for calibrating surface contamination meters, such as Calibration/Calibration of surface contamination meters-averaged devices, even if no more than standard deviation is required for calibrating surface contamination meters, such as jg 395-2016, Calibration procedures and no more Calibration/Calibration of surface contamination meters are required according to standard Calibration procedures or Calibration procedures.

In view of the above, the present invention is particularly proposed.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a portable calibration device for α and β surface pollution meters, which can accurately position the distance between a probe detection window of the surface pollution meter and the surface of a planar source, can fix various types of surface pollution meter probes, ensure the accurate distance between the probe detection window and the surface of the planar source, ensure the accurate, stable and reliable scale value by ensuring that the distance between a α planar source is 5mm and the distance between a β planar source is 10mm, improve the efficiency by arranging six windows, simultaneously carry out the calibration and calibration work of six α and β surface pollution meters, and simultaneously has small integral device, can be randomly disassembled and assembled, and is convenient for external inspection and carrying.

The technical scheme of the invention is as follows:

a portable α and β surface pollution instrument calibrating device comprises a fixing frame base and a probe fixing frame, wherein a plane source groove is formed in the fixing frame base, a measuring window matched with the plane source groove is formed in the probe fixing frame, and the probe fixing frame is installed on the edge of the plane source groove and enables the distance between a probe detecting window of the surface pollution instrument and the surface of the plane source to be in accordance with a preset value.

Furthermore, according to the portable detection device for the α and β surface pollution instruments, the probe fixing frame is provided with the through hole, the corresponding position on the edge of the plane source groove is provided with the fixing upright post, and the probe fixing frame is sleeved on the fixing upright post through the through hole, so that the distance between the probe detection window of the surface pollution instrument and the surface of the plane source meets a preset value.

Further, in the portable verification device for α and β surface contamination meters, notches are arranged at corresponding positions of the probe fixing frame and the edge of the planar source groove.

Furthermore, in the portable verification device for α and β surface pollutionmeters, a plurality of plane source grooves are arranged on each fixing frame base.

Further, in the α, β portable verification device for surface contamination meters, the number of the probe holders corresponds to the number of the planar source slots.

Further, in the portable verification device for α and β surface polluter, the measuring window is provided with a probe holder with a convex edge which is matched with the probe of the surface polluter in a shape.

Further, in the portable verification device for α and β surface contamination meters, the measurement window is a circular window, a rectangular window or a square window.

The invention has the following beneficial effects:

the calibrating device is simple to operate and high in precision, can calibrate/calibrate α and β surface pollution meters of different types of probes, and is convenient to carry during outgoing calibration.

Drawings

Fig. 1 is a schematic structural diagram of a portable detection device of α, β surface contamination meters of the present invention.

Fig. 2 is a schematic structural diagram of a fixing frame base according to an embodiment of the invention.

Fig. 3 is a schematic structural diagram of a fixing frame of a circular measuring window according to an embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a holder of a square measurement window according to an embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a fixing frame of a rectangular measurement window according to an embodiment of the invention.

In the above drawings, 1, a fixed mount base; 2. a probe fixing frame; 3. a radioactive source tank; 4. an edge; 5. fixing the upright post; 6. a through hole; 7. a measurement window; 8. a convex edge; 9. a probe bracket.

Detailed Description

The invention is described in detail below with reference to the figures and examples.

As shown in FIG. 1, the invention provides a portable verification device for α, β surface pollution meters, which comprises a fixing frame base 1 and a probe fixing frame 2.

As shown in FIG. 2, the fixing frame base 1 is provided with a plane source groove 3, the probe fixing frame 2 is provided with a measuring window 7 matched with the plane source groove 3, the probe fixing frame 2 is installed on a fixing upright post 5 at the edge 4 of the plane source groove 3, so that the distance between the measuring window 7 and the plane source groove 3 meets a preset value, the preset value is set differently according to different plane sources, for example, the distances between α and β standard plane sources and a surface pollution instrument are respectively determined to be 5mm and 10mm, each fixing frame base 1 can be provided with a plurality of plane source grooves 3, in the embodiment, the number of the plane source grooves 3 is six, the number of the fixing frames 2 corresponds to the number of the plane source grooves 3, the positions of the through holes 6 of the probe fixing frame 2 and the fixing upright posts 5 on the edge 4 correspond to each other, the probe fixing frame 2 is sleeved on the fixing upright posts 5 on the edge 4 through the through holes 6, and in addition, the arrangement of the gaps is to facilitate the detection of the standard plane source fixing frame for picking and placing the plane sources.

As shown in fig. 3, 4 and 5, the measuring window 7 is a circular window, a rectangular window or a square window. And a probe bracket 9 matched with the surface pollution meter probe is arranged on the measuring window 7. The probe bracket 9 can support the bottom edge of the surface pollution instrument probe. The distance between the pollution instrument and the plane source groove 3 can be guaranteed to be a preset value, the convex edge 8 can fix the pollution instrument probe, and the surface pollution instrument probe is prevented from moving.

When the device works, the lower surface of the measurement window 7 is opposite to the plane source in the plane source groove 3, α and β surface pollution meters are placed on the measurement window 7, the surface pollution meters exactly correspond to the standard plane source, and particles emitted by the standard plane source exactly enter the detection windows of the α and β surface pollution meters.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A portable α and β surface pollution instrument calibrating device is characterized by comprising a fixing frame base and a probe fixing frame, wherein a plane source groove is formed in the fixing frame base, a measuring window matched with the plane source groove is formed in the probe fixing frame, and the probe fixing frame is installed on the edge of the plane source groove so that the distance between the probe detecting window of the surface pollution instrument and the surface of the plane source can meet a preset value.

2. The portable α, β surface contamination meter calibrating device of claim 1, wherein the probe fixing frame is provided with a through hole, a fixing upright post is provided at a corresponding position on the edge of the planar source groove, and the probe fixing frame is sleeved on the fixing upright post through the through hole, so that the distance between the probe detection window of the surface contamination meter and the surface of the planar source is in accordance with a preset value.

3. The portable verification device for α, β surface contamination instrument as claimed in claim 1, wherein the probe holder and the edge of the planar source tank are provided with notches at corresponding positions.

4. The portable verification device for α, β surface contamination meter as claimed in claim 1, wherein a plurality of planar source wells are provided on each holder base.

5. The portable verification device for α, β surface contamination meter as claimed in claim 4, wherein the number of the probe holders corresponds to the number of the planar source slots.

6. The portable α, β surface contamination meter verification device as claimed in claim 1, wherein the measurement window is provided with a probe holder with a protruding edge for form-fitting with the surface contamination meter probe.

7. The portable verification device for α, β surface contamination meter as claimed in any one of claims 1-6, wherein the measurement window is a circular window, a rectangular window or a square window.