Radon and thorium analyzer

1. Purpose

Based on the measurement principle of GB14582-19993 double filter membrane, it is the only and currently advanced portable multifunctional instrument for "real-time" and "continuous" measurement of environmental radon concentration/radon-thorium daughter and total natural potential concentration/radon concentration in water in China. It can be compared with the performance effect of German RTM series radon meter, and has excellent cost performance. The "active" sampling structure has typical advantages, it can be used in underground engineering, underground mines, tourist caves, nuclear facilities, associated uranium ore systems, geological exploration, seismic radiation hazard assessment and indoor environment radon measurement, health supervision and radioactivity detection and evaluation. It is a necessary device for finding radon (thorium) sources, radon treatment and radiation safety evaluation, and meets the application research requirements of the Radiation Effect Committee on radon and thorium daughter monitoring and radon dose estimation, it is also a requirement for radon daughter measurement required by field measurement and environmental assessment. The instrument can give immediate results, simple operation, easy to carry, suitable for large-scale radon and daughter level survey.

2. Conditions of use

a) Ambient temperature:-10~45 ℃

B) Relative humidity: ≤ 95%

C) power supply: 6V battery, with charger, battery charging can work continuously for about 10 hours; AC220/50Hz can also be used.

3. Main technical performance

a) Detector type: semiconductor detector, with small size, fast response and insensitivity to γ;

B) Sensitivity: ≤ 1.3X10-13gRa/pulse (100 seconds, radium),≤ 0.03 (300 seconds, thorium);

c) Probe background: ≤ 60CPS;

d) Detection efficiency of 239Pu-α surface source: 45%(2π);

e) Repeated measurement error: ≤ ± 10%;

f) Counting capacity 99999999; measurement range: radon/radon daughter concentration 2 × 106Bq/m3, ∂potential concentration 1 × 10-8-10-2J/m3, measurement lower limit 8nJ/m3.

g) Linearity deviation: ≤ ± 0.5%

h) Measurement interval:

Mode 1 (continuous measurement of radon concentration with radon daughter filter),

Method 3 (total radon/daughter potential measurement) is 26min, I .e. 26 points to give the result;

Mode 2 is within 1~100 minutes, radon concentration is measured regularly, and the timing radon concentration measurement can be set according to its radon level. The inside of the instrument has been set to 26min, which can meet the needs of ordinary measurement. Generally, data can be queried without printing.

I) The instrument has a high degree of automation, which can change the parameter settings, automatically display, give the results in real time, set the "output" function key, and can store 100 historical measurement results inside.

j) Miniature sampling pump: 1L/min (built-in).

K) size and weight: 245*245*255,4.5Kg.

Components: RTM-I instrument host, water radon device (bubbler), charger, 5V power supply, manual, warranty card/certificate, connecting hose, military green instrument box.