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Instruments and Software Solutions for Health Physics and Emergency Response
Gamma Portal Monitors PM-702
Category II* pedestrian portal monitor
Pedestrian Portal Monitors Models PM-700 and PM-702 • DESCRIPTION: TSA’s PM-700 series monitors are standalone, pedestrian portal monitors with excellent sensitivity and reliability. While both systems are generically similar, the PM700’s large detectors improve its performance to the point that it approaches ASTM 1169-97 Category III sensitivity for SNM. The PM-702 offers a lower cost alternative while maintaining high performance standards. All of the essential components are contained in the pillars; radiation detectors, controllers, and occupancy detector. The systems operate 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 24 hours. The PM-700 system utilizes our model SC-755 controller in the master pillar, and model SCA-725 single channel analyzer in the slave pillar. The PM-702 utilizes only the SC-755 controller. See the detailed description of these devices under their headings in this data sheet.
PM-700
Category II (III)* pedestrian portal monitor
Model PM-700 and PM-702 SPECIFICATIONS • SENSITIVITY: PM-700: Approaches ASTM Standard C 1169-97* for Category III monitors, (3g HEU or 0.08gPu) PM-702: Meets ASTM Standard C 1169-97* for Category II monitors, with optional ramp. (10g HEU or 0.29g Pu) • DETECTORS: PM-700: Two, 36˝h x 10˝w x 1.5˝d (90 x 25 x 3.8cm) organic plastic scintillator detectors per pillar provide approximately 2,080 in3 (35.4 liters) of detector volume per system. The detectors are shielded on five sides with 0.375˝ (10mm) of lead. PM-702: Two, 80˝h x 3˝w x 3˝d (203 x 7.6 x 7.6cm) organic plastic scintillator detectors per pillar provide approximately 1,440 in3 (26.3 liters) of detector volume per system. The detectors are shielded on two sides with 0.25˝ (6.3mm) of lead. • ALARM LEVEL: N*sigma, entered from the numeric keypad. • FALSE ALARM RATES: Typically less than 1 in 1,000 passages, as tested in accordance with ASTM Standard C 1169-97*. • POWER REQUIREMENTS: 90 - 250 Vac, 47 - 63 Hz, less than 100 VA • BATTERY LIFE: Greater than 24 hours normal operation • DIMENSIONS: PM-700: 84˝h x 22˝w x 8˝d (214 x 56 x 20cm) PM-702: 100˝h x 6˝ø (250 x 6cm) per system, not including controller enclosure. Typical passage width is 33˝ (82cm) • WEIGHT: PM-700: ≈400 lb (182kg) per pillar PM-702: ≈300 lb (136kg) per system • ENVIRONMENTAL: -30˚ to 122˚F (-34˚ to 50˚C) Designed for use in a sheltered area. • OPTIONAL COMPONENTS: Heaters, AM-255, Ramp for PM-702 *ASTM Standard C 1169-97 is available from TSA Systems, Ltd. or The American Society for Testing and Materials, 100 Barr Harbor Drive, West Conshohocken, PA 19428, (610) 832-9585.
• APPLICATIONS: These 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, and nuclear waste disposal and storage sites where protection of SNM is essential. 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. • INSTALLATION: After the initial site preparation is completed, the systems can be installed and operating in less than an hour. • OPERATION: When the system is powered up, it acquires an initial background. This process 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 to 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 an AM-255 or site security system. System status is continuously updated on the SC-755 display. 7/99
LAURUS Systems, Inc. - Phone 410-465-5558 - Fax 410-465-5257
www.LaurusSystems.com
Instruments and Software Solutions for Health Physics and Emergency Response
Vehicle Portal Monitors
VM-250
Models VM-250 and VM-375
Vehicle portal monitor
• DESCRIPTION: Model VM-250: The VM-250 system normally consists of two, self contained, weather resistant pillars placed on either side of the entrance to be protected. Each pillar contains two plastic scintillator detectors, an occupancy detector, and an amplifier/controller. The master pillar also has a battery and power supply/battery charger. Model VM-375: The VM-375 system is essentially a VM-250 with a third pillar positioned horizontally between the two upright pillars. The third pillar can be mounted above or below the other pillars. The VM-375 provides improved sensitivity over the VM-250. Please contact TSA to discuss configuration and requirements for VM-375 systems. • APPLICATIONS: These monitors are designed to automatically scan vehicular 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 in installations such as uranium enrichment plants, weapons manufacturing and storage plants, nuclear laboratories, and nuclear waste disposal and storage sites where protection of SNM is essential. The units can be insulated, heated and/or cooled for use in severe environmental conditions. • INSTALLATION: The system requires two conduits, one to provide ac power to the battery charger, and one for the interpillar connections. A third conduit may be required to route signals to an AM-255 or an on site alarm system.
Model VM-250 SPECIFICATIONS • SENSITIVITY: Refer to Los Alamos publication number LA-13247-MS*, April 1997, “An Update for the Applications Guide to Vehicle SNM Monitors”. • DETECTORS: Two, 30˝h x 6˝w x 1.5˝d (76 x 15 x 3.8cm) organic plastic scintillator detectors per pillar provide approximately 1,080 in3 (17.6 liters) of detector volume per pillar. The detectors are shielded on five sides with 0.375˝ (10mm) of lead. • ALARM LEVEL: N*sigma, entered from the numeric keypad. • FALSE ALARM RATE: Typically less than 1 in 1,000 passages • POWER REQUIREMENTS: 90 - 250 Vac, 47 - 63 Hz, less than 100 VA • BATTERY LIFE: Greater than 24 hours of normal operation • DIMENSIONS: 96˝h or 120˝h x 10˝w x 10˝d (244 or 305 x 25 x 25cm) per pillar • WEIGHT: ≈300 lb (136kg) per pillar • ENVIRONMENTAL: -30˚ to 122°F (-34˚ to 50°C) Designed for outdoor use in most climates. For extreme conditions, optional heating/cooling is available. • OPTIONAL COMPONENTS: Heaters and Insulation, AM-255 *This report is available to DOE and DOE contractors from the Office of Scientific and Technical Information, P.O. Box 62, Oak Ridge, TN, 37831, (423) 576-8401. It is available to the public from the National Technical Information Service, US Department of Commerce, 5285 Port Royal Road, Springfield, VA 22616.
The pillars are usually bolted to a concrete footing, with the interconnecting conduits installed under the roadway. The pillar spacing varies from 10 feet (3m) to 32 feet (10m) depending on local requirements for sensitivity and traffic. • OPERATION: When the system is powered up, it acquires an initial background. This process 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 to 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 an AM-255 or site security system. System status is continuously updated on the SC-755 display. 7/99
LAURUS Systems, Inc. - Phone 410-465-5558 - Fax 410-465-5257
www.LaurusSystems.com
Instruments and Software Solutions for Health Physics and Emergency Response
Alarm Monitor
AM-255
Model AM-255
Remote alarm monitor
• DESCRIPTION: TSA’s model AM-255 Alarm Monitor is a battery powered, remote monitor unit designed for use with TSA’s pedestrian and vehicle portal monitors. The AM-255 provides both audible and visual alarm indications for radiation alarms, low and high background alarms, and tamper conditions. Parallel relay outputs are provided to permit interfacing with existing alarm systems. The AM-255 may be located up to 300 ft (100m) from the farthest pillar to be monitored. A test button is provided to check the operation of the lamp and audio circuits. An acknowledge button silences the audio and clears the lamp(s). If the alarm is not acknowledged, the lamps will follow the system’s status.
Model AM-255 SPECIFICATIONS • POWER REQUIREMENTS: 90 - 250 Vac, 47 - 63 Hz, less than 50 VA provides power to charge the internal, 12 volt, 7Ah sealed lead-acid battery pack • BATTERY OPERATION: More than 24 hours of normal operation • DISPLAY: 4 alarm indicator lamps (LEDs) per pillar being monitored; one systems ready LED, one power on LED • CONTROLS: Momentary contact alarm acknowledge switch, key lock switch, and lamp test switch • CONNECTIONS: Power: Standard, three pin, U.S. 115Vac power connector Input: One 4 pin, quick connect type terminal strip per system Output: One 12 pin, quick connect type terminal strip per system • OUTPUT RELAY CONTACTS: Maximum 0.6 amp at 120Vac • DIMENSIONS: 7.5˝h x 8.375˝w x 8˝d (19 x 21.3 x 20.3cm) • WEIGHT: ≈15 lb (6.8kg) • ENVIRONMENTAL: -30˚ to 120°F (-34˚ to 50°C), designed for use in a sheltered area.
The AM-255 operates from an internal battery which is continuously charged from the ac line. If ac power is lost, the battery will provide > 24 hours of continued operation. One AM-255 will monitor two systems or two SC-755 controllers. The AM-255 is controlled by a Programmable Logic Device. This allows the flexibility to provide custom operation for special applications. • CONTROLS AND INDICATORS: Four lamps per pillar, power LED, SONALERT audio annunciator. An internal jumper selects either blinking or steady lamps. Lamp test and alarm acknowledge switches. A key switch is provided to disable the audio alarm. 7/99
LAURUS Systems, Inc. - Phone 410-465-5558 - Fax 410-465-5257
www.LaurusSystems.com
Instruments and Software Solutions for Health Physics and Emergency Response
System Controller Model SC-755
SCA-725
• DESCRIPTION: TSA’s System Controller, model SC-755 is a general purpose controller which is used in most of TSA’s portal monitors. The SC-755 utilizes a Zilog, Z8 family microcontroller, and a programmable logic device to perform most of the control functions. It also contains two amplifier/SCA channels and a high-voltage power supply.
Single-channel analyzer
A four line, twenty character LCD display is used to monitor system status and set up information. Set up is accomplished using the twelve key, telephone style keypad mounted on the front of the unit, or using the Windows™ based program included with the unit. All of the settings and system status are stored in non-volatile RAM internal to the unit. The status information can be downloaded using the Windows™ based program. • OPERATION: The SC-755 is calibrated and programmed with default values before being shipped from the factory. Final set up is necessarily site specific, and should be optimized to meet local requirements.
SC-755
System controller
The unit has a base time interval of 200ms. All internal timing is based on this interval. The number of base intervals used in the moving average may be programmed. The alarm comparisons are performed every 200ms when the system is occupied. The system also logs system activity to non-volatile RAM. Each entry is time and date stamped. Events that are logged to NVRAM include: hourly background updates, tamper alarms, background alarms, and radiation alarms. The NVRAM may be downloaded to a PC via the RS-232 port.
Model SC-755 SPECIFICATIONS • POWER REQUIREMENTS: 9 - 15Vdc, @ ≈ 200ma • DISPLAY: LCD, four lines x 20 characters • KEYPAD: Twelve key, telephone style • AMPLIFIERS: Two nuclear pulse amplifiers with discriminators and SCA outputs • COUNTER CHANNELS: Four digital counter channels • INPUT CONNECTORS: Two BNC connectors for detector signal inputs, circular connector for digital inputs from an SCA-725 • OUTPUT CONNECTORS: Two MHV connectors for detector high voltage, circular connector for power and control signals to an SCA-725, relay outputs for status to external indicators and/or an AM-255 • HIGH VOLTAGE POWER SUPPLY: Up to 1,500 Vdc, @ 50µA • RS-232 I/O: DB-9F connector for interface to a PC using the Windows™ based communications program • DIMENSIONS: 9˝h x 4.5˝w x 3˝d (22.5 x 11.3 x 7.5cm) • WEIGHT: 3 lb (1.3kg)
Model SCA-725 SPECIFICATIONS • POWER REQUIREMENTS: 9 - 15 Vdc, @ ≈ 75ma (in a standard, two channel configuration) • AMPLIFIERS: Up to four nuclear pulse amplifiers with discriminators and SCA outputs • INPUT CONNECTORS: Up to four BNC connectors for detector signal inputs, circular connector for power and control signals from an SC-755 • OUTPUT CONNECTORS: Up to four MHV connectors for detector high voltage, circular connector for outputs to an SC-755 • HIGH VOLTAGE POWER SUPPLY: Up to 1,500 Vdc, @ 50µA • DIMENSIONS: 9˝h x 4.5˝w x 3˝d (22.5 x 11.3 x 7.5cm) • WEIGHT: 3 lb (1.3kg)
Programmable parameters are: background alarm levels (low and high), number of 200ms intervals per alarm comparison, number of 200ms intervals to continue monitoring after occupancy clears, N*sigma radiation alarm level (N*sigma + background), discriminator levels (lower and upper for each pillar), which detectors are in use, and which detector combinations are used for alarm comparisons. These parameters and the clock/calendar may be set from the front panel keypad or via the RS-232 port. Diagnostic features are provided. The available functions are: variance analysis and show count mode. The detector counts are also displayed while the discriminators are being adjusted.
Single-Channel Analyzer Model SCA-725 • DESCRIPTION: TSA’s model SCA-725, Single-Channel Analyzer is a self contained amplifier/SCA module designed for use in the slave pillar of our portal systems. The SCA-725 is designed to be used in conjunction with an SC-755. It supplies high voltage to the detectors, and amplifies the nuclear pulses from the photo-multiplier tubes. • OPERATION: The SC-755 controls the discriminator settings via a serial link. The SCA outputs are sent to the SC-755 as a current pulse to eliminate interference and crosstalk. 7/99
LAURUS Systems, Inc. - Phone 410-465-5558 - Fax 410-465-5257
www.LaurusSystems.com
