mona mobile radiation detection - radtech · document-title mona mobile radiation detection...

MONA Mobile Radiation Detection

Product Description

08.07.2015 Version 2.5.5.rev3 of 14 © ENVINET GmbH

0 Information on the Document

Project Survey Document-Title MONA Mobile Radiation Detection

Document Subtitle Product Description

Project

Customer

Owner ENVINET GmbH • Hans-Pinsel-Str. 4 • 85540 Haar

Department intern

Author Dr. Sascha Reinhardt

Filename \\192.168.145.20\Admin\F-Marketing\Doku\ProduktInfo\MONA\MONA-Product_Description-2.5.5.rev1.docx

Version 2.5.5.rev3

Date 08.07.2015

Status in progress

Changes versus Version 0 Version no. Author / Date Chapter Description

0rev0 Dr. S. Reinhardt All Start

1rev0 Dr. S. Reinhardt All Erweitert

2.5.4.rev1 Dr. S. Reinhardt All Update





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Table of Contents

0 INFORMATION ON THE DOCUMENT ......................................................................... 2

MONA AT A GLANCE.................................................................................................................... 4

1 INTRODUCTION .......................................................................................................... 5

2 PRODUCT OVERVIEW ................................................................................................ 6

2.1 MONA System Overview ............................................................................................ 6

2.1.1 The Spectroscopic Gamma Detector ...................................................... 7 2.1.2 The Gamma Dose Rate Detector MIRA ................................................... 7 2.1.3 The Neutron Detector ............................................................................... 7

2.2 Theory of Operation.................................................................................................... 7

2.3 User Interface .............................................................................................................. 8

2.4 Specifications MONA system .................................................................................. 11

3 ACCESSORIES .......................................................................................................... 12

3.1 Mounting frame MONA-800-E/F ............................................................................... 12

3.2 Transport box MONA-800-T ..................................................................................... 12

3.3 Vehicle top box MONA-800-B ................................................................................... 12

3.4 Part list ...................................................................................................................... 13

4 COMPANY INFORMATION ....................................................................................... 14


MONA at a glance MONA is ENVINET’s mobile spectroscopic detection and survey system for vehicle or airborne use. It is able to detect smallest amounts of artificial radiation in the environment, coming from potential threats like nuclear incidents or accidents, non-authorized usage of sources used in medical application or in the industry, or other incidents in connection with radioactive materials, e.g. during transportation or in case of terroristic attacks. MONA is used by mobile emergency response teams for the detection and localization of radiation and contamination in the environment. The system acquires the gamma spectra and identifies the isotopes, calculates the total gamma dose rate as well as the dose rate for each identified nuclide. It compares the measured and calculated results against predefined alarm levels and uses GPS data to assign the actual monitoring location to the related data records and spectra. The complete data set is stored in a local database. The nuclide-related data are displayed on an included laptop in the vehicle as color-coded tracks on a map, and are linked to spectra, waterfall diagrams, graphs and tables, thus easing the identification and localization of any contamination in the field. Measured tracks and isotope information can be transmitted to the monitoring center as well, using cellular networks like 3G or LTE (satellite as an option) in order to provide online information to radiation protection specialists and decision makers, to take action and manage countermeasures. The monitoring center based on ENVINET’s server application NMC can display and compare survey results from numerous survey vehicles simultaneously. MONA uses a high sensitive large volume NaI(TI) scintillation detector. Optionally, the system can be extended with up to three auxiliary detector of smaller or larger size (max. 4 liter scintillator detector), e.g. to cover a larger range for spectroscopic measurements or to support airborne applications. If several spectroscopic gamma detectors are used directional information can

be provided. A Geiger-Mueller based gamma dose rate detector for the high dose rate range and a neutron detector for neutron survey are available as an option, too.

MONA consists of two parts; the self-contained detection unit in a sealed cabinet and the laptop. The detection unit can be either installed outside the vehicle, typically on the roof of the car or inside of the vehicle. For additional protection and to avoid attracting attention, the detection unit can be integrated in a top box mounted on top of the car. No wired connection is needed between the detection units. The detection unit can be powered from its integrated rechargeable battery for approx. 24 hours.


1 IntroductionMONA is ENVINET’s mobile spectroscopic detection and survey system for vehicle or airborne use. It is able to detect the smallest amounts of artificial radiation in the environment, which originate from potential threats like nuclear incidents or accidents, non-authorized usage of sources, dirty bombs etc.

MONA offers

Acquisition and storage of gamma spectra (every cycle)

In-situ isotope identification

Directional information if several detectors used

Measurement of total gamma dose rate H*(10)

Provision of isotope-specific gamma dose rate H*(10)

Online visualization on maps (tracking)

Display of data in tables, charts and waterfall diagram with 2D sectional views

Storage and retrieval of vehicle survey data tracks

Visible and audible alarms

Remote control from central monitoring center and online visualization at central monitoring center via remote desktop

MONA can be used for

survey and detection of gamma contamination in the environment

uncovering and localization of hidden radioactive material

vehicle and airborne acquisition of surface contamination

profiles (screening of areas)

support during nuclear emergencies for civil defense, fire brigades and radiation protection

routine monitoring around nuclear installations

detection and localization of very low artificial contamination

fast acquisition provides high spatial resolution


2 Product Overview

2.1 MONA System Overview

MONA system consists of at least one spectroscopic gamma detector, an optional gamma detector MIRA and an optional internal or external neutron detector. The system is operated by a laptop that is used to configure the MONA and the data management and data visualization.

The MONA laptop communicates with the detector system over WiFi (Ethernet is also possible1). One spectroscopic gamma detector unit is configured as central unit and is the counterpart of the communication for the laptop. Up to three additional spectroscopic gamma detectors, one gamma dose rate detector MIRA and a neutron detector can be connected to this central unit. GPS is used for position finding.

Over GPRS/UMTS/LTE the laptop can communicate with a monitoring center and a remote administration over remote desktop is

1 If the optional dose rate detector MIRA is part of

the system, the Ethernet device is not accessible, because the MIRA uses this device.

implemented. In addition, a data exchange to a monitoring center is possible.


2.1.1 The Spectroscopic Gamma Detector The MONA system uses scintillator detectors as spectroscopic gamma detectors. The maximum size is a four litre detector. The system supports up to four scintillators of different size and type e.g. it is possible to combine a high sensitive four litre NaI(Tl) detector with a high resolution 2”x2” LaBr3(Ce). Using different sized detectors it is possible to extended the measurement range

because larger detectors have in general a lower upper limit. The detector is placed inside a hermitical housing and uses a photomultiplier as light sensor for the light emission by the scintillator crystal. To protect the detector against mechanical vibrations and thermal shocks a foam is used. The detector is calibrated to H*(10).

2.1.2 The Gamma Dose Rate Detector MIRA The optional MIRA gamma detector is designed to measure the ambient gamma dose rate H*(10) from 10 nSv/h up to 10 Sv/h. The used detectors are two Geiger

Mueller tubes. One tube is for the low dose rate level and the other is for the high dose rate level. The MIRA is calibrated to H*(10).

2.1.3 The Neutron Detector The optional 3He neutron detector can be integrated as internal solution with a diameter of 25.4 mm and an active length of 150 mm. The pressure is 2 bar. The external solution

is normally connected over RS 232 to the MONA. The dimension and pressure of the external neutron s. specification section.

2.2 Theory of Operation The MONA is designed to be operated as mobile monitoring system mounted on a car or helicopter/airplane. MONA is a scalable solution which allows to uses up to four MONA gamma spectrometer, one gamma dose rate detector (MIRA) and neutron detector. One MONA gamma detector acts as central unit that communicate with the NMC system on the laptop over WiFi. This central unit also provides the power supply for all other detectors.

After the ON button is pressed on the MONA central unit and the NMC is started. The MONA performs a warm up period. In this period the system is checked, the initial calibration of the spectroscopic gamma detectors is performed and the system waits

for a GPS signal. After the warm up is finished a measurement can be started using the NMC interface of the laptop which is used as software package.

The initial calibration of the spectroscopic gamma detector consists of determination of the detector temperature to locate the initial region of the nuclide line used as reference for energy calibration. The energy calibration is designed to ensure a fixed energy to channel relation. Every minute the position of the reference nuclide is checked and the gain of the MCA is adjusted to keep the reference nuclide at the same channel position.

After the initial warm up is finished a track measurement can be started. During the measurement the total gamma dose rate


H*(10), nuclide identification and also nuclide specific gamma dose rate is evaluated on a

configured time interval.

2.3 User Interface The user interface of the MONA system is a user friendly interface based on a web browser application running on the laptop. The user interface provides all configuration possibilities that are needed for normal operation. The measured data are shown in real time in graphs, map and waterfall diagram. On the screen also alarming are indicated.

The collected data can be easily exported to other monitoring network software as NMC that provides a corresponding import function. The software provides various configuration and displaying options like user configurable color scales for the track to indicate the dose rate level at a given location.

Figure 1 Operation screen MONA


Figure 2 Example user interface MONA. Options for displaying information at one point.

Figure 3 Configuration color schema for individual track color


Figure 4 Example spectrum view


2.4 Specifications MONA system

Unit MONA-100-303 (central unit) MONA-100-030 (aux. unit)

MONA-100-302 (central unit)

MONA-100-020 (aux. unit) MONA-100-301 (central unit) MONA-100-010 (aux. unit)

Spectroscopic detector

Material NaI(Tl) NaI(Tl) NaI(Tl)

Size Inch 4x4x4 2x4x16 4x4x16

Detector volume litre 1 2 4

Dose rate range1 µSv/h 0.001...50 0.001...25 0.001…12

Accuracy % +/-20 +/-20 +/-20

Energy resolution1

FWHM (guarantee

d)

typ. 7.9 %

(<8.5 %)

Energy range keV 30...3000

Total efficiency1 cpm / µSv/h 457 900 904 000 1 604 000

Photopeak efficiency

1

cpm / µSv/h 152 500 304 000 588 000

Intrinsic background nSv/h <5

Acquisition interval 0.1 s or longer, depending on configuration

MCA

Number of channels 8192 (2048 used, depends on configuration)

ADC Bit 12

Clock speed MHz 16

Environmental specification

Operation

temperature detector unit

°C °F

-40…+60 -40…+140

IP class detector unit IP68 (except battery compartment)

Humidity detector unit

% 0…100

Electrical specification

Power central unit W 5.8

Supply voltage V 10…16 V (min. 4 A for charging)

EMC-proofed EN55022:2006 + A1:2007 + A2:2010 Class B

EN55024:1998 + A1:2001 + A2:2003

Size and weight specification

Dimension mm 775 mm x 180 mm x 198 mm 1075 mm x 180 mm x 198

mm 1075 mm x 180 mm x 198 mm

Weight kg 18 25 33

Comm. interface WiFi, Ethernet, RS232 (Service), LTE (4G), Satellite (optional), other on request

Option additional Geiger Mueller tube (GM)

Detector MIRA-100-L (details s. MIRA data sheet)

Range mSv/h 0.000 01..10 000

Option additional He-3 detector

Detector Internal MONA-500-M External MONA-500-N

Pressure bar 2

Effective volume cm3 18.6 1514

Dimension mm Integrated in MONA central unit 1075 mm x 180 mm x 198 mm

Thermal neutron

sensitivity cps / nv 4.4 258

Optional Accessory

s. product description for details

Extended system with several spectroscopic gamma detectors (e.g. 2x4 liter) Various test sets (s. production description) MIRA-100-L: MIRA (GMT) for extended dose rate range (up to 10 Sv/h) MONA-500-M: Integrated Neutron detector MONA-500-N: External Neutron detector MONA-800-B: Vehicle top box; Dimension 1770 mm x 770 mm x 420 mm; Weight 15 kg MONA-800-T: Transport box with damping; Dimension 1430x415x296 mm; Weight 14 kg


3 Accessories

3.1 Mounting frame MONA-800-E/FTo mount the MONA in a customer top box or other installation a mounting frame is offered as accessory. Depending on the configuration a mounting frame MONA-800-E (MONA only) or MONA-800-F (MONA+MIRA) is needed.

The mounting frame is equipped with damping elements and allows to fix the MONA (and MIRA) and the GPS receiver (s. Figure 5).

Figure 5 Mounting frame MONA-800-F with MONA and MIRA

3.2 Transport box MONA-800-TTo store or transport the transport box MONA-800-T is available as accessory. The case is equipped with foam that protects the MONA (and optional MIRA) against vibration and shocks.

The transport box is a flexible solution for a secure and save handling of the MONA.

Dimension 1430x415x296 mm

Weight 14 kg

3.3 Vehicle top box MONA-800-BTo mount the MONA on the top of a car a vehicle top box is available. In combination with a mounting frame MONA-800-E/F it provides a secure possibility for installation on a car roof.

Dimension 1770x770x420 mm

Weight 15 kg


3.4 Part list

Part number Description

MONA-800-B Vehicle top box

MONA-800-T Transport box for one MONA with option MIRA

MONA-800-G Gamma test set MONA (Cs-137, <10 kBq)

MIRA-800-0100 Gamma test set MIRA (Cs-137, 360 kBq)

MIRA-800-0102 Gamma test set MIRA (Eu-152, 500 kBq)

MONA-800-N Neutron test set MONA (Cf-252, 1 MBq)

MONA-800-F Mounting frame with damping for MONA with optional MIRA

MONA-800-E Mounting frame with damping for MONA

MONA-800-R Replacement battery MONA

MONA-200-T Tablet for control and visualization


4 Company Information

For 30 years our customers have been relying on ENVINET's solutions when monitoring environmental parameters. With over 4,500 online detectors in operation, we are the leading manufacturer of networks to monitor environmental radiation. ENVINET's products and solutions reflect the experience and innovative capability of our team, thus guaranteeing top quality, extremely reliable yet, at the same time, highly functional solutions.

Address:

ENVINET GmbH

Hans-Pinsel-Str. 4

85540 Haar (Munich)

Germany

Contact:

+49 (89) 456657-0

[email protected]

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