PM-700AG/PM-700AGN Radiation Portal Monitors

RAVEN compatible

Description

TSA’s PM-700AG and PM-700AGN are stand-alone pedestrian radiation portal monitors with excellent sensitivity and reliability. The PM-700AG’s large detectors and unique detection algorithm improve its performance to the point that it can achieve ASTM Standard C 1169 Category III* sensitivity for SNM (special nuclear materials).

All of the essential components are contained in the pillars: radiation monitors / detectors, controller, occupancy detector. The system operates from an internal battery. The battery is constantly charged from the site’s ac line during normal operation. In the event of a power outage, the battery permits continued operation for at least 12 hours.

Model PM-700AGN adds neutron detection capability to the basic PM-700AG. Both models are equipped with RS-232 and Ethernet communications capability.

The PM-700AG and PM-700AGN systems utilize TSA’s model SC-770 controller, and model SCA-775 amplifier/single channel analyzer.

OPERATION: After the initial site preparation is completed, the systems can be installed and operating in less than an hour. When the system is powered up, it acquires an initial background count. The process normally takes twenty seconds. The background is continually updated until the system is occupied.

When the infra-red detector senses occupancy, the system starts comparing the current count with the most recent background data. Alarm comparisons are made every 200ms. If the count exceeds the alarm level, both audible and visual alarms will be triggered. The system monitors itself and indicates low and high background conditions. A closed circuit tamper output is available for connection to the AM-270 or site security system. System status is continuously updated on the SC-770 display.

Applications

These radiation portal monitors are designed to automatically scan pedestrian traffic without the need for frequent calibration. They are intended for applications where the relatively low energy emissions from ²³⁵U and ²³⁹Pu are the main concern. They are currently in use at uranium enrichment plants, weapons manufacturing plants, weapons storage sites, nuclear laboratories, nuclear waste disposal, and storage sites where protection of SNM is essential.

Neutron monitoring adds the capability of detecting shielded neutron emitters.

Both models share TSA’s unique design features of high sensitivity and reliable operation in variable background environments. These systems cover most pedestrian monitoring applications. TSA’s expert engineering staff can adapt them to meet special requirements, if necessary.

Specifications