Description
Application
Detection units – BDRG-47R, BDRG-47R-01 are used for early detection of the accident at nuclear plant, development and localization control by uninterrupted measurements of gamma-ray dose capacity absorbed in air inside the confinement in all types of emergency, including unexpected. For remote measurements of gamma-ray dose capacity absorbed in air on nuclear-hazardous heated and unheated objects: nuclear waste storage, working premises and etc. For analysis of Gamma-active radionuclide activity volume, in high temperature fluids state, under pressure. Detection units can be used in radiation control systems measurement channels, and also in stand-alone units.
Features
Minimal amount of montage works is required when installing detection units in confinement on a nuclear power plants: cable passage welding with integrated pipes in confinement, HV and current communication line connection with electronics. Noiseless remote (100m from detector) doze capacity measurement, from normal reactor exploitation (10^-6 Gr/h, currency <10^-14 A) to emergency state (10^5 Gr/h, currency<10^-3 A). Work reliability as a result of under-control operation relevant to working time – 35 years. Continuous control of the detection units efficiency using the reactor as a power source. Remote control of stability and work of electrical tract, if the current and HV communication lines are in one-peace, electrode system in the ionization chamber. Metrological calibration approach: basic (out of manufacture) and periodic (Customers) without dismantling the unit in the exploitation places. Possibility of remote-assignment from operation point: currency conversion rate in doze capacity, provisional and emergency threshold alarm, highest and lowest limit calculation. Two Independent digital channels availability, for receive/transfer data RS-485 MODBUS RTU. Maximum line range from the detector to electrical measurement unit – 100m. Current line isolation resistance non less than 1011 Om. Doze measurement capacity sensetivity removal from inffluence of line lenght and temperature adjustments. Availability to work with a high range of ionizing radiation detectors, in particular with current chambers for neutron-ray measurement. Activity in reactor confinement in conditions of a unexpected accident: temperature 2500С adding vapour/air mixture 0,7 Mpa. Reference: 4 – Nuclear power plant, 8 – power units, 23 – apparatus.
SPECIFICATION
| Product | Count | Usage | Size, mm | Weight, KG |
|---|---|---|---|---|
| Detection unit | 1 | 240х70 F | 10 | |
| Electrometric Block | 1 | 380х300х150 | 15 | |
| Cable passage with communication lines | 1 | Cable passage presence is determined by the delivery contract | 1500х180 F | 200 |
| Indication remote | 1 | Only for BDRG-47R-01 unit | 300х250х250 | 10 |
| Service equipment | 1 | Is determined by the delivery contract | Nootebook |
SPECIFICATION
| Parameter | Value |
|---|---|
| Measurement range, Gr/h | 10 ^-6 ÷ 105 |
| Measurement uncertainty limit, % | ± 20 |
| Radiation source of the detection unit and communication lines with a cable passage, Gr | 106 |
| Work conditions of the detection unit and communication Standart work lines with a cable passage inside the confinement , 0 С; MPa | Standart work +10; 0,1 Accident 1h-250; 07 5h-207;0,7 18h-165 |
| Standart temperature range of electrometric unit and indicator remote, 0 С | 5÷45 |
| Temperature instability measurements in all temperature range adjustments is below | 1/3 main uncertainty |
| Rigitiry ralatively to energy 660 Kev in range of Ramma energy range (0,07÷3)Mev, % 1) In measurement range, starting from (2÷3) 10^-6 Gr/h |
±20 |
