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Portable calibrating device for alpha and beta surface pollution instruments

The technology of a surface contamination instrument and a verification device is applied in the measurement of instruments and radiation, etc., to achieve the effects of high precision, simple operation, and easy to carry out for verification.

Inactive Publication Date: 2020-03-31
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

To ensure that the scale value is accurate, stable and reliable

Method used

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  • Portable calibrating device for alpha and beta surface pollution instruments
  • Portable calibrating device for alpha and beta surface pollution instruments
  • Portable calibrating device for alpha and beta surface pollution instruments

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Experimental program
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Embodiment Construction

[0021] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0022] Such as figure 1 As shown, the present invention provides a portable verification device for an α and β surface contamination meter, which includes a fixing frame base 1 and a probe fixing frame 2 .

[0023] Such as figure 2 As shown, the base 1 of the fixing frame is provided with a plane source groove 3; the probe fixing frame 2 is provided with a measurement window 7 matched with the plane source groove 3; the probe fixing frame 2 is installed on the plane The edge 4 of the source trough 3 is fixed on the column 5 so that the distance between the measurement window 7 and the planar source trough 3 conforms to a preset value. The preset value can be set differently according to different plane sources; for example, the distances between α and β standard plane sources and the surface pollution meter are respectively determined as 5mm and 10...

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Abstract

The invention relates to a portable calibrating device for alpha and beta surface contamination instruments. The portable calibrating device comprises a fixing frame base and a probe fixing frame, thefixing frame base is provided with a plane source groove and an edge upper fixing stand column. The probe fixing frame is provided with a measuring window matched with the plane source groove; and the probe fixing frame is sleeved on a fixed upright post on the edge of the fixed base through a through hole, so that the distance between the probe detection window of the surface pollution instrument and the surface of the plane source conforms to a preset value. The calibrating device is simple to operate and high in precision, can calibrate / calibrate alpha and beta surface contamination instruments of different types of probes, and is convenient to carry for outdoor calibration.

Description

technical field [0001] The invention belongs to the field of nuclear industry, and in particular relates to a portable verification device for an α and β surface pollution meter. Background technique [0002] The α, β surface contamination meter is one of the most widely used nuclear monitoring instruments, and the calibration / verification of the surface contamination meter is a necessary condition for its use. The calibration / verification of the surface pollution meter is carried out according to the verification regulations or related standards. The main domestic ones are JJG2041-89 "Measuring Instrument Verification System for Measuring α and β Surface Pollution" and JJG478-2016 "Verification Regulations for α and β Surface Contamination Instruments", and the international Mainly refer to ISO 8769 "Reference sources—Calibration of surface contamination monitors—Alpha-,beta-and photon emitters" or IEC 60325 "radiation protection instrumentation—alpha, beta an alpha / beta (b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T7/00
CPCG01T7/005
Inventor 姚艳玲张路明姚顺和朱保吉
Owner CHINA INSTITUTE OF ATOMIC ENERGY