TK-605 Reactor primary circuit water radioactive activity on line measurement& Fuel element failure online and real time measurement system produced by Beijing Tai Kun Industrial Equipment Co.,Ltd is an innovative product with full intellectual property rights.This measurement adopt the principle of online anti – Compton and can detect reactor primary circuit water radioactive activity. It is reached that low energy radionuclide and high energy radionuclide detection efficiency keep balance by well designed. So that the activity of low-energy and high energy γ ray can be measured simultaneously.
TK-605 calculates and analyzes the damage condition of fuel rod including the count of damaged fuel rod, size of damage and the position of fuel rod according to working condition information of reactor and fuel element parameter and key nuclide activity of reactor primary circuit water.
TK-605 Reactor primary circuit water radioactive activity on line measurement& Fuel element failure online and real time measurement system is comprised by Anti-Compton on line measurement subsystem, fuel element damage analysis subsystem and measure information management subsystem. Measurement system consists of HPGe detector, electronic cooler, ring detector, lead shield device, digital MCA, full-automatic spectrum analysis software and source-less efficiency calibration software can make on line continuous monitoring for 3 kev~10 MeV fission and activity product of coolant in reactor primary circuit water. TK-605 has successfully applied in the nuclear plant and it is highly evaluated by users in the accuracy of measurement results and the reliability of long-term operation. .
Ⅱ. Main Features
l TK-605 is the world’s first set of Reactor primary circuit water radioactive activity on line measurement& Fuel element failure online and real time measurement anti-Compton HPGe measurement system which is independent researched and developed in China. It is reached that low energy radionuclide and high energy radionuclide detection efficiency keep balance by well designed. So that the activity of low-energy and high energy radionuclide can be measured simultaneously and the effect of Compton scattering on radioactivity measurement is effectively suppressed.
l Fuel damage analysis of TK-605 was tested by two typical cases in the world. Analysis result is highly consistent with the actual case.TK-605 can make reliable measurement form low energy radionuclide to high energy radionuclide in the Application of one of Chinese plant and the measurement result is consistent with the sampling measurement result in uncertainty。
l The accuracy measurement of TK-605 is consistent with sampling measurement. The long-term stability and accuracy is highly recognized by the users in the operation process in nuclear plant.
l TK-605 adapts to the demand of the online measurement. In order to keep the product’s highly availability, we can replace the electronics when it is broken and recover it within 72 hours.
Ⅲ. Technical Specifications
l Major nuclide of measurement：Kr-85m、kr-87、kr-88、Xe-133、Xe-135、Xe-138、I-131、I-132、I-133、I-134、I-135、Cs-134、Cs-137、Cs-138、Co-60、Co-58、Fe-59、Na-24 etc，show the measurement result uniformly spaced 15 mins by 15 mins、30min and 45mins and radionuclide activity curve over time in real time;
l Detection low limit：50Bq/ml（Xe-133），show activity measurement result and minimum detectable limit at the same time；
l Measuring time：15mins~600mins；
l Error of damaged rod account：≤20%；
l MTBF：12000 hours；
l MTTR：≤8 hours。
l Radionuclide activity measurement online of Reactor primary circuit water，fuel element failure online measurement in nuclear plant； Radionuclide activity measurement online of Reactor primary circuit water，fuel element failure online measurement in marine power reactor.
Fig2 Field Application in nuclear plant
Fig.3 Reactor primary circuit water radionuclide activity curve of over time
Fig 4 activity analysis interface
Fig 5 Reactor core fuel rod condition