Detection units of  RW system on the object

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2. Structure of system
 

Numbers on figures mean: 1. Printing unit 2. Main unit of  processing and representation of information 3. Uninterruptible power supply 4. Power unit 5. Beeper 6. Detection units BDPS-07

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3. Device and working of system
 

Schematic circuit of RW system

The stream of the gamma quantum getting on the detector, registers in the detection unit BDPS-07. The detection unit BDPS-07 ensures transformation of a stream of the gamma quantum getting on the detector, to a numerical value of a counting rate.
 If the result of the next measuring has exceeded a fixed operating threshold above a hum level (both aside increases, and aside reduction of indications), the system gives out the conferring on the fact of overflow of fixed operating thresholds.
 The conferring on the fact of overflow of fixed operating thresholds appears on the display of the personal computer included in the central arrangement of machining and map of the information. The audible signal of high-pitch tone with the help of the speaker systems connected the central arrangement of machining and map of the information given out simultaneously.
The system ensures installation of two levels of the threshold signal system - preventive and emergency. Levels of the threshold signal system are established both aside increases, and aside reduction of indications.
 During operation, the system continuously arrests and writes down the following information in journals:

 - In the «Background» journal have noted on results of measuring of a background for a period of operation of system enter the name;

 - In the «Operations of system» journal have entered the name note on the facts of operation of system at overflow of an emergency threshold;

 - In the «Operation of system» journal have noted on a make-time and lockouts of system, and about modes of operation of system (a regime "Monitoring" or "Observation") in a powered condition enter the name.

 Numbered journals can scanned on the display of the central arrangement of machining and map of the information. The information written down in these journals has preserved constantly and could not be deleting the user.

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4. Specifications
 

Working range of detection units which are included in system, microCi	0,1...250
Range of energies of the gamma radiation logged by detection unit of system, MeV	0,06...3
Time of an exposure at monitoring gamma radiation at a level of a natural background no more, second	30
Ac mains supply, In (frequency, Hz)	187...242 (49,4...50,5)
Saving of serviceability at lockout of a supply of the network during, minutes	20
Average time to failure not less, h	10000
Target date of a service of system, years	10
Overall dimensions no more, mm: - The detection unit BDPS-07 - The power unit the transformer of the interfacing	105 (diam.) х 860 270 х 190 х 100
Weight no more, kg: - The detection unit BDPS-07 - The power unit of the transformer of the interfacing	9 4

 

Service conditions
Ambient temperature for detection units, °C	-30...+50
The admissible relative humidity for detection units at temperature +35°C and is lower without a moisture condensation up to, %	95
Ambient temperature for the arrangement of gathering, machining and map of the information, °C	+5...+50
The admissible relative humidity for the arrangement of gathering, machining and map of the information at temperature +35°C and is lower without a moisture condensation up to, %	80

The system has fixed a change of gamma-ray intensity to background level. A minimum value of a threshold is 10 % from a background level at exposure time 30 second no more. The thresholds have positioned at all detection units separately. It can be as aside augmentations (the upper threshold), and aside decreases (the inferior threshold) of gamma-ray intensity.
The system has transfer data from the detection unit up to the set of machining and an information display on distance up to 1000 m. The set of machining and an information display has ensured incorporation acoustical and a light alarm on distance up to 2000 m.
The system leads nonvolatile journals:
- The count of background dose rate in storage;
- The operations with bracing changes of controlled magnitude, date and time of operation;
- The system "on" and "off".
The data could be conservational in journals within one year. It is possible to receive a duplicate on a paper.
Software of a system has ensured the setting an initial (basic) level of a controlled field and the setting of thresholds signalling.
The design of detection units had ensuring an opportunity of their deactivation.

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