About alphaNUCLEAR

AlphaNUCLEAR started business in 1975 as a manufacturer of instrumentation for the detection and measurement of radon gas and radon progeny. These instruments are used worldwide in applications that include health physics, geophysics and earthquake prediction, and environmental studies.

In mining health physics applications, our continuous working level (CWL) monitors are used in most of the world's uranium mines. These compact, rugged, lightweight scientific instruments monitor, record, and if so equipped, provide prompt visual and audible warning of radon levels. Some are designed as long term station monitors, and some as personal alpha dosimeters (PADs). Most are deployed on or within visual range of personnel working in confined under ground environments such as mines, caves, storage facilities, and tunneling operations.

Radon working level (WL) measurement inherently involves drawing ambient air through an appropriate filter membrane and counting the alpha particle radiation from radon progeny trapped on the filter. The alphaNUCLEAR WL monitors are the continuous sampling type (CWL), meaning the air pump and alpha event counter(s) run continuously. The alpha counts are integrated into 10 minute periods, then stored in a nonvolatile memory with capacity for up to 55 days of run time data.

For continuous working level (CWL) measurements to be consistent and accurate, the volume of air pumped through the filter must be known and constant. All alphaNUCLEAR CWL monitors utilize a form of mass airflow measurement, this provides the system microprocessor with data for closed loop servo control of the airflow. Following completion of a sampling run (>7 hours), the periodic (10 minute) count data is read out from the CWL monitors with a PC running the alphaNUCLEAR PRISM software. This software programme performs complex WL calculations and generates reports that include average WL, maximum WL, periodic WL listing, and graphical WL plots. An estimate of the average thoron WL can be reported from sampling times longer than about 36 hours.

AlphaNUCLEAR also offers a line of dust pump systems. These flow controlled pumps with flow rates of 2.5 and 5 liters per minute, can be packaged along with the cap lamp battery/light system, or with a small rechargeable 9 hour battery pack. Custom design and manufacture of radon related instrumentation and accessories are also available.

4. Model 560-2 (565-2) PRISM II CWL Monitors

The basic Model 560 is a CWL monitor intended for operation as a station monitor. The 560 is a gross alpha counting (>2 Mev) system. The 565 variant features three radon level indicating LED lamps (green, yellow, and red), The light's activation threshold levels are user set via the RS-232 serial communication port.

The 560/565 is fitted with an internal rechargeable battery, this battery is capable of supporting up to 30 hours of operation without power from the AC adapter/battery charger. An optional stainless steel cover is available to protect the instrument in extremely hostile environments (underground mining). An optional stainless steel slide-in mounting bracket is available to retain the instrument on a shelf structure. An optional waterproof connector provides control signals for external lights systems, such as the model 575 (1) larger lights box.

A PAD version of the 565 is also available, the model 561.

3. Model 591 PAD monitor

The model 591 is a CWL monitor intended for operation as a personal alpha dosimeter. The 591 features 4 alpha energy counting windows. These windows are internally set to count the activity on the filter from RaA (6 MeV), RaC' (7.7 MeV), ThC '(8.8 MeV), and gross count (>2 Mev).

The 591 includes three radon indicating LED lamps (green, yellow, and red), a unique feature for a PAD monitor. To provide a quick recover from a high level (red light ) condition, the lights are controlled by the short half-life RaA count. To optimize this feature, the alpha energy resolution is enhanced by the inclusion of an alpha particle collimator (stainless steel honeycomb) between the detector and the filter.

The light's and horn activation levels are user set via the RS-232 serial communication port. For industrial applications the 591 is fitted with an internal rechargeable battery, this battery is capable of supporting up to 9 hours of operation without power from the AC adapter. For underground mining applications the 591 can be fitted with a 6 volt lead acid (gel) battery pack (8 or 12 hour) and cap lamp assembly.

2. Model 575 Large Lights Box

An optional waterproof connector provides control signals for external lights systems, such as the model 575 large lights box.

The count data can be read, and the periodic standard WL report produced with the PRISM PC Software package. Or for sites requiring many PADS, an automatic software PC based data acquisition and reporting system is available.

If programmed, and deployed with AC power adapters, the 591 PAD units can also be used as station monitors.

1. Model 595-2 Spectroscopy PRISM III CWL Monitor

The Model 595 is a CWL monitor intended for operation as a station monitor. The 595 features 4 alpha energy counting windows. These windows are internally set to count the activity on the filter from RaA (6MeV), RaC' (7.7 meV), ThC' (8.8 MeV), and gross count (>2 MeV).

The 595 features include three radon level indicating LED lamps (green, yellow, and red). To provide a quick recovery from an alarm condition, the lamps activation is referenced to the RaA count , to optimize this unique feature, the alpha energy resolution is enhanced by the inclusion of an alpha particle collimator between the detector and the filter.

The light's activation levels are user set via the RS-232 serial communication port.

The 595 is fitted with an internal rechargeable battery. This battery is capable of supporting up to 30 hours of operation without power from the AC adapter/battery charger.

An optional stainless steel cover is available to protect the instrument in extremely hostile environments (underground mining). An optional stainless steel slide-in mounting bracket is available to retain the 595 on a shelf structure.

Model 575 Large Lights Box

An optional waterproof connector provides control signals for external lights systems, such as the model 575 larger lights box.

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