Radiometer RZA-07D “Tetra – A” is designed to control contamination of workroom surfaces with alpha – active radionuclides, equipment and other objects by measurement of the flux density of alpha – particle.
Radiometer is used at nuclear fuel cycle facilities in the units responsible for controlling radiation situation.
| Measurement range of flux density of alpha particles for
239Pu |
0,5 – 5·104 part/ min ∙cm2 |
| Sensitivity of the radiometer |
No less than 0,5 с-1/min-1∙сm-2 |
| Limit of the basic relative error of the radiometer at p = 0,95 |
± (15 + 10/Ах) % * |
| Instability of the radiometer readings during 8 h of continuous operation |
No more than 5 % |
| Level of the own radiometer background |
No more than 0,3 part/ min ∙cm2 |
| Operation mode setup time |
No more than 5 min |
| Working area of the detector |
70 сm2 |
| Radiometer is resistant to the values of MED of gamma-radiation |
10 mZv/h |
| Radiometer is powered by two batteries |
Type of АА (R06) size |
| Time of operation from two just charged batteries |
No less than 12 hours |
| Environment temperature |
from -20°С to +50°С |
| Relative humidity |
Up to 75 % at +30°С |
| Atmospheric pressure |
from 84 to 106,7 kPa |
| Variable magnetic field of industrial frequency of the voltage |
Up to 400 А/м |
| Level of casing protection |
No worse than IP54 |
| Resisting to
• Temperature and humidity radiometer refers to Group V2a; |
|
| It is functional after 5 min impact of alpha radiation with flow density of |
Up to 5∙107 part/ min ∙cm2 |
| Additional error at max. influencing factor |
No more than 25 % |
| Mean time between failures |
No less than 8000 h |
| Average lifetime |
Not less than 10 years |
| Overall dimensions |
Ø122×190×230 mm |
| Weight of the radiometer |
No more than 2,5 kg |
* – Ах –numeric measured value