Fig. 1 TK-208 neutron-gamma personal dosimeter
Ⅰ. Product Introduction
TK-208 is a neutron-gamma personal dosimeter using the latest international high-sensitive personal dose device developed with a new single crystal, as shown in Figure 1. Compared with the conventional neutron-gamma personal dosimeter using a (CsI+LiI(Eu)) as a detection unit, the structure and circuit are simpler and more reliable, and the gamma energy resolution is higher, and the neutron detection efficiency is higher. The crystal used in NPG-1 has a large volume, with high sensitivity and with high 6Li abundance, and the sensitivity is higher more than 1000 times than that of the neutron-gamma personal dosimeter using semiconductors as a detector. The unique energy compensation design effectively guarantees the reliability of the measurement results.
Ⅱ. Main Features
l A single crystal is used to measure neutrons and gamma-ray simultaneously, greatly simplifying the structure and circuit, and enhancing reliability;
l Energy compensation design is used, to get reliable data;
l n-γ discrimination technology is used, with the neutron and gamma channel interfering effectively controlled;
l High-density crystal is used, with high detection efficiency, which can detect dose rate changes of 10nSv / h; To support the networking and GIS, achieving the intelligent and network measurement of the staff dose and field radiation.
Ⅲ. Technical Specifications
l To measure neutron and gamma dose rate simultaneously;
l Detector: CLYC crystal;
l Alarm: sound, light and vibration alarm;
l Sensitivity: γ: not less than 600cps (1μSv / h) for 137Cs;
Neutrons: not less than 300cps (1μSv / h) for 241Am;
l Dose rate: γ: 0.01μSv / h to 0.1mSv / h;
l Neutron count rate: 1-999 / s;
l Energy range: γ: 20keV-3MeV; neutrons: thermal neutrons to 15MeV;
l Error range: ± 20%;
l Protection level: IP65;
l Response time: 0.25s;
l Standby time: working for 250h continuously;
l Power supply: built-in rechargeable lithium battery, with wireless charging;
l Operating ambient temperature: -30℃ to 50℃;
l Weight: 200 g;
l Communication: to support USB and Bluetooth communication;
l Ground drop test: at 1.5m from the cement ground.
Ⅳ. Applications
l Used by staff working in nuclear power plants, nuclear submarines, nuclear arsenals and other neutron - gamma radiation field and also by staff working in the site having neutron – gamma radiation field.
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