Factory Direct: RJ12 Series Pedestrian Radiation Monitoring Equipment

technical feature

project name	Parameter information
Types of detectors	Plate plastic scintillator + low noise photomultiplier tube
Detector volume	5,10,15 optional with dual probe (door default dual probe)
Maximum pass rate	10⁶cps
energy range	25keV~3MeV
sensitivity	m5000cps / (Sv / h) (10 L, relative¹³⁷Cs）
Detection lower limit	Ability to detect radiation above the background of 5nSv / h
Optional one, the neutron tube	Probe type: long life³He neutron detector (1 atmospheric or pressure optional) Energy range: 0.025eV (hot neutron) ~14MeV Count of life: 10¹⁷A count Effective detection area size: 50mm 600mm, 25mm 600mm, 57mm 1054mm is optional; Sensitivity: 75 cps / Sv / h (relative to the other)m²⁵²Cf） Underlying count: <5cps
Optional dinnuclide recognition	Detector type: France SAN Gobain bulk sodium iodide detector + low potassium quartz photomultiplier tube Detector volume: 1 l, 2 l optional, equipped with dual probes Maximum pass rate: 10⁶cps Energy range: 25keV~3MeV Sensitivity: 20,000 c p s / (Sv / h) (2 L, relativem¹³⁷Cs）

Main technical indicators of the detectors

Main technical indicators of the system

1. Static detection efficiency (A-B) A. Static detection efficiency of the pedestrian monitoring system

radioactive source	The main energykeV	Static detection efficiency		Dose rate at 1.5m / (nSv.h^-1/MBq
radioactive source	The main energykeV	s^-1/MBq	s^-1/(nSv.h^-1)	Dose rate at 1.5m / (nSv.h^-1/MBq
²⁴¹Am	60	≥220	≥94	2.3
⁵⁷Co	122,136	≥840	≥90	9.3
¹³⁷Cs	662	≥960	≥23	42
⁶⁰Co	1173,1332	≥1800	≥11	160
¹³³Ba	3,181,302,356	≥1680	≥73	23

pour: 1. The 252Cf neutron standard test source with a strong neutron source of 12000 / s (1 ± 20%) is placed at the location of the detector reference point 2. The neutron count rate shall meet the requirement of the count rate of> 100 (1 ± 20%) / s Static detection efficiency of the B-row package monitoring system

radioactive source	The main energykeV	Static detection efficiency		Dose rate at 1.5m / (nSv.h^-1/MBq
radioactive source	The main energykeV	s^-1/MBq	s^-1/(nSv.h^-1)	Dose rate at 1.5m / (nSv.h^-1/MBq
²⁴¹Am	59.5	≥480	≥92	5.2
⁵⁷Co	122,136	≥2400	≥114	21
¹³⁷Cs	662	≥2640	≥28	95
⁶⁰Co	1173,1332	≥5760	≥16	360
133Ba	3,181,302,356	≥4560	≥88	52

2. Detection sensitivity Pedestrian monitoring system and line package monitoring system Pedestrian: Detection probability f 90% speed v=1.2m/s Line package: probe probability f 90% speed v=1m / s

radioactive source	Activity or quality
¹³⁷Cs	0.08MBq
⁶⁰Co	0.02MBq
²⁴¹Am	2.27MBq

3. Anti-interference performance of the neutron detector When a 60Co source generates a dose rate at the geometric center of the neutron detector surface of the monitoring system, greater than 120 Sv / h, the monitoring system should not trigger a neutron alarm 4. False alarm rate: 0.01% (, neutron) Probability of a detection system alarm caused by non-radioactive substances or non-SNM 5. overload characteristics When the detector surface dose rate is> 120 Sv / h, the monitoring system shall maintain the alarm state and return to the background state, and the alarm release time is less than 60s. 6. Sensitivity consistency Within the range of the detection area Pedestrian ± 25% Line Pack ± 25%①　The BIN (Background Identification of Normal) background ignores the technology ②　MCA multispectrum analyzer, characteristic SIGMA statistical algorithm ③　NORM function (⁴⁰K) Quick distinguish between common artificial and natural nuclides (e. g⁴⁰K、²³²Th） ④　Nuclide recognition function (with sodium iodide probe / optional) ⑤　Combining the sodium iodide detector and the MCA multichannel energy spectrometer analyzer can accurately distinguish between medical nuclides, industrial nuclides, and natural radionuclides

Natural nuclide	⁴⁰K、²²⁶Ra、²³²Th
Industrial nuclide	²⁴¹Am、¹³⁷Cs、⁶⁰Co、⁵⁷Co、²²Na、¹³³Ba、⁵⁴Mn、⁸⁸Y
Medical nuclides	¹³¹I、²⁰¹Tl、²⁰³Hg、¹⁸F、^99mTc、⁹⁹Mo、¹⁹²Ir
Special nuclear materials	⁵⁷Co、¹⁵²Eu、²³⁸U

⑥　High-speed sampling (fastest: 200ms)

Misalarm rate

In a stable environment: Use the space sensor, 10000 times, false alarm rate 1 Without using the occupying sensor, the false alarm rate and misidentification rate are used once within 12h γ Radiation Response Occup 50 times, alarm 49 times Outrange Over 100 v S / h, a high radiation alarm is emitted and removed within 1min after the source leaves Radiation-induced neutron alarm No neutron alarm is triggered when the dose rate of γ-ray reaches 100 Sv / h Background influence When the background change is large enough to cause a large change in the alarm probability, the monitoring system shall issue a warning prompt

Nuclide recognition

Natural nuclide	⁴⁰K、²²⁶Ra、²³²Th
Industrial nuclide	²⁴¹Am、¹³⁷Cs、⁶⁰Co、⁵⁷Co、²²Na、¹³³Ba、⁵⁴Mn、⁸⁸Y
Medical nuclides	¹³¹I、²⁰¹Tl、²⁰³Hg、¹⁸F、^99mTc、⁹⁹Mo、¹⁹²Ir
Special nuclear materials	⁵⁷Co、¹⁵²Eu、²³⁸U