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.
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.
|Product||Count||Usage||Size, mm||Weight, KG|
|Detection unit||1||240х70 F||10|
|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|
|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
|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