ERG Model 102 F/W Scanning Systems

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Annabelle Joseph
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The following text outlines some key features of both the ERG Model 102F/W radiological surface scanning systems and the ERG Sample Manager static measurement collection software.

1 The following text outlines some key features of both the ERG Model 102F/W radiological surface scanning systems and the ERG Sample Manager static measurement collection software. The processes of setup, data collection, and data management below represent the most basic functions of the systems and software. The software is highly customizable and can be catered to the project and client needs. ERG Model 102 F/W Scanning Systems ERG maintains two primary scanning systems: The Model 102F used for scanning floor surfaces, and the Model 102W used for scanning wall surfaces. Each system utilizes a single laptop system computer for operation. The system computer includes all necessary software utilities to perform the functions associated with the on-board equipment; including instrument function checks, surveying, and data export. An additional software utility is included to combine all collected survey data and perform advanced functions. The structure of the database management process is designed to handle any number of surveying systems and can be merged with other collected field survey data, greatly simplifying reporting and presentation. The process is demonstrated below using the Model 102F. Figure 1 Each system uses a single database for storing radiological detection equipment information and function check entries. Radiological detection equipment and check source information (make/model, serial number, activity, etc.) are entered into the system database using the Function Check utility.

Figure 2 Model 102 F/W Quality Assurance Process: A series of 1-minute scaler counts are obtained for each detector array zone at the beginning of the project.

2 Figure 2 Model 102 F/W Quality Assurance Process: A series of 1-minute scaler counts are obtained for each detector array zone at the beginning of the project. The results are used to compare against and ensure the detector array is functioning consistently for the duration of the project. The Function Check utility automates the collection of QA counts directly through the Ludlum counter, and stores these values in the system database. The utility handles the output of each individual zone of the Model 102 F/W detector array.

Figure 3 When performing daily function checks of the equipment, the source count and background count values are automatically compared with the QA criteria developed in Figure 2 above.

3 Figure 3 When performing daily function checks of the equipment, the source count and background count values are automatically compared with the QA criteria developed in Figure 2 above. The results are flagged if these values are above or below some user defined level, such as ± 10% of the QA count mean. The Function Check utility also records the operating high voltage, and the alpha and beta channel threshold values, for each zone of the detector array. All QA data are stored in the system database and backed up as a.xml file for data integrity.

4 Figure 4 A survey is performed using the Scanner utility. Upon starting a survey a data file is created. Each data file allows for entries such as the building name/number, room name/number, survey unit, surveyor name, and any associated surveyor comments. All survey data are logged to the data file. The associated relative position of each recorded measurement is displayed on the computer screen in real-time.

5 Real-time position and heading of detector array. Outline of room or scanning perimeter. Spatial location of the collected alpha and beta counts (6 channels) Figure 5 The Scanner utility includes a simple user interface that allows the surveyor to change/set drive motor speed and counting interval, and to start/stop data collection. This figure demonstrates several different survey paths in a partially cluttered room.

6 Previous file loaded as background layer (office) Spatial location of alpha/beta counts for new file (Hallway) Figure 6 When necessary, a new data file can be created at any time while maintaining a global reference point. This figure demonstrates moving the Model 102F to new scanning location, creating a new data file, and loading a previous data file as a background layer. As shown, the building perimeter is continually constructed and added to the map when moving throughout the area.

7 Figure 7 Data from multiple scanning systems can be combined seamlessly using the Export Manager utility. Select the storage location (a USB memory stick or networked drive), click on the Export button, and the data files are exported to the drive. While exporting data the Export manager utility also creates backup files and prohibits the overwriting of existing data.

Figure 8 The Data Manager utility is run on only one computer, performs numerous data processing functions, and handles all organization of the survey data files.

8 Figure 8 The Data Manager utility is run on only one computer, performs numerous data processing functions, and handles all organization of the survey data files. The utility allows the user to create a project locally or on a server where others will have access to the data. Figure 8 demonstrates how data are imported into the survey project. The operation merges the system databases from each scanning system, imports all survey files, and creates a log of backup data.

9 Figure 9 Once imported, survey data files can be opened and displayed using the utility. The Data Manager utility supports 3D display and rotation of the survey data and allows the user to view information about each record/file.

10 Figure 10 When using the Data Manager utility each survey data file is analyzed for a date/time record. Both alpha and beta efficiencies for each detector array zone are queried from the Function Check utility in the systems database, allowing for the ability to quickly convert alpha and beta counts into surface activity units, such as dpm/100cm 2. The Data Manager utility also performs more advanced processing functions, such as nearest neighbor averaging on 3D datasets, calculating summary statistics of survey data, and generating histograms of the survey data.

11 Th-230 check source placed on floor in survey pathway. Figure 11 The Data Manager utility is also useful for determining survey measurements that exceed some user defined threshold or project limit, such as a DCGL. Survey data that exceed this value stand out on the system computer screen as larger red dots. Figure 11 demonstrates the scan data where a Th-230 source was placed on the floor in the Model 102F survey pathway. Because the Data Manager utility is also installed on each system computer it can be used in the field to quickly analyze individual data files, perform counts to surface activity conversions, and export coordinates of elevated measurements all before leaving the survey area.

12 Figure 12 Figure 12 shows the tabular data of exceedances from surveying a Th-230 source on the floor; including date/time, relative coordinates, and alpha and beta surface activities.

Figure 13 Once analyzed, the Data Manager utility exports all data directly into shapefile (.shp) format which can then be managed and presented in ArcGIS, CAD, or Excel.

13 Figure 13 Once analyzed, the Data Manager utility exports all data directly into shapefile (.shp) format which can then be managed and presented in ArcGIS, CAD, or Excel. Each record includes metadata such as surveyor name, date/time, scanning system id, detector array zone, building name/number, room name/number, survey unit, count time, coordinate, scaler count, alpha and beta efficiencies, alpha and beta surface activities, and other information that allow the file to be easily imported into a geodatabase and linked with other project databases.

14 Scanning using both the Model 102F and Model 102W Spatial location of the collected alpha and beta counts Real-time position and heading of detector array. Outline of room or scanning perimeter (in 3D) Figure 14 The Model 102W Scanner utility is used with the Model 102W when the scanning of walls is required. The 102W Scanner utility utilizes a 3D real-time interface to show the detector position in real-time, as well as all collected data. The Scanner utility includes a simple user interface that allows the surveyor to change/set stepper motor speed and counting interval, and to start/stop data collection. This figure demonstrates several paths of walls being scanned. The software allows the view to be rotated as needed to scan the opposite two adjacent walls. Figure 14 demonstrates scanning using a four zone detector. The Model 102W can also use the same 6 zone detector as shown on the 102F.

15 Figure 15 Because the Model 102F and the Model 102W were designed to work together, data from both floor scans and walls scans may be imported directly into the Data Manager utility and displayed with no spatial processing required. The figure demonstrates the raw floor file, and the raw wall file for the same room.

16 Figure 16 The Data Manager utility supports full 3D display, so data may be rotated and zoomed to ensure full scanning coverage of the room was achieved. After processing, as demonstrated above, data may be exported directly into a Shapefile or Excel file and displayed using any 3D viewing software, such as ArcScene. The Data Manager utility also supports the reporting of important summary data, such as the function check data tables for each counter and detector array combination used in the project. Below is a Data Manager utility sample report:

17 Function Check Summary System ID: 1 Meter Type: 4612 Serial Number: PR Date: 8/16/2013 Detector Type: Serial Number: Zone Area: 100 cm² Alpha Source: Th-230 Serial Number: Emission Rate: 9,910 cpm Beta Source: Tc-99 Serial Number: L Emission Rate: 13,600 cpm Th-230 (cpm) Tc-99 (cpm) Blank (cpm) Date/Time Channel HV a b a b a b a b Initials Type 8/16/2013 3:57:21 PM TA QA 8/16/2013 3:57:21 PM TA QA 8/16/2013 3:57:21 PM TA QA 8/16/2013 3:57:21 PM TA QA 8/16/2013 3:57:21 PM TA QA 8/16/2013 3:57:21 PM TA QA 8/16/2013 3:57:21 PM TA QA 8/16/2013 3:57:21 PM TA QA 8/16/2013 3:57:21 PM TA QA 8/16/2013 3:57:21 PM TA QA 8/16/2013 3:57:21 PM TA QA 8/16/2013 3:57:21 PM TA QA 8/16/2013 3:57:21 PM TA QA 8/16/2013 3:57:21 PM TA QA 8/16/2013 3:57:21 PM TA QA 8/16/2013 3:57:21 PM TA QA 8/16/2013 3:57:21 PM TA QA 8/16/2013 3:57:21 PM TA QA Reviewed By: Date: Page 1 of 3

18 System ID: 1 Meter Type: 4612 Serial Number: PR Date: 8/16/2013 Detector Type: Serial Number: Zone Area: 100 cm² Alpha Source: Th-230 Serial Number: Emission Rate: 9,910 cpm Beta Source: Tc-99 Serial Number: L Emission Rate: 13,600 cpm Th-230 (cpm) Tc-99 (cpm) Blank (cpm) Date/Time Channel HV a b a b a b a b Initials Type 8/16/2013 3:57:21 PM TA QA 8/16/2013 3:57:21 PM TA QA 8/16/2013 3:57:21 PM TA QA 8/16/2013 3:57:21 PM TA QA 8/16/2013 3:57:21 PM TA QA 8/16/2013 3:57:21 PM TA QA 8/16/2013 3:57:21 PM TA QA 8/16/2013 3:57:21 PM TA QA 8/16/2013 3:57:21 PM TA QA 8/16/2013 3:57:21 PM TA QA 8/16/2013 3:57:21 PM TA QA 8/16/2013 3:57:21 PM TA QA Reviewed By: Date: Page 2 of 3

19 System ID: 1 Meter Type: 4612 Serial Number: PR Date: 8/19/2013 Detector Type: Serial Number: Zone Area: 100 cm² Alpha Source: Th-230 Serial Number: Emission Rate: 9,910 cpm Beta Source: Tc-99 Serial Number: L Emission Rate: 13,600 cpm Th-230 (cpm) Tc-99 (cpm) Blank (cpm) Date/Time Channel HV a b a b a b a b Initials Type 8/19/ :01:13 AM TA 8/19/ :01:13 AM TA 8/19/ :01:13 AM TA 8/19/ :01:13 AM TA 8/19/ :01:13 AM TA 8/19/ :01:13 AM TA Reviewed By: Date: Page 3 of 3

20 Quality Assurance Counts Summary System ID: 1 Channel: 1 Th-230 cpm Tc-99 cpm Blank (cpm) Net Counts (cpm) Date/Time a b a b a b a b 8/16/2013 3:57:21 PM /16/2013 3:57:21 PM /16/2013 3:57:21 PM /16/2013 3:57:21 PM /16/2013 3:57:21 PM Channel: 2 Th-230 cpm Tc-99 cpm Blank (cpm) Net Counts (cpm) Date/Time a b a b a b a b 8/16/2013 3:57:21 PM /16/2013 3:57:21 PM /16/2013 3:57:21 PM /16/2013 3:57:21 PM /16/2013 3:57:21 PM Channel: 3 Th-230 cpm Tc-99 cpm Blank (cpm) Net Counts (cpm) Date/Time a b a b a b a b 8/16/2013 3:57:21 PM /16/2013 3:57:21 PM /16/2013 3:57:21 PM /16/2013 3:57:21 PM /16/2013 3:57:21 PM Reviewed By: Date: Page 1 of 3

21 System ID: 1 Channel: 4 Th-230 cpm Tc-99 cpm Blank (cpm) Net Counts (cpm) Date/Time a b a b a b a b 8/16/2013 3:57:21 PM /16/2013 3:57:21 PM /16/2013 3:57:21 PM /16/2013 3:57:21 PM /16/2013 3:57:21 PM Channel: 5 Th-230 cpm Tc-99 cpm Blank (cpm) Net Counts (cpm) Date/Time a b a b a b a b 8/16/2013 3:57:21 PM /16/2013 3:57:21 PM /16/2013 3:57:21 PM /16/2013 3:57:21 PM /16/2013 3:57:21 PM Channel: 6 Th-230 cpm Tc-99 cpm Blank (cpm) Net Counts (cpm) Date/Time a b a b a b a b 8/16/2013 3:57:21 PM /16/2013 3:57:21 PM /16/2013 3:57:21 PM /16/2013 3:57:21 PM /16/2013 3:57:21 PM Reviewed By: Date: Page 2 of 3

22 QA Table Summary Statistics System ID 1 Total QA Counts Per Detector Channel: 5 Net Average (cpm) Net Standard Deviation (cpm) Average Blank (cpm) Channel a b a b a b a b 1 2,314 2, ,349 3, ,314 2, ,426 3, ,387 2, ,480 3, QA Limit Summary System ID 1 a b a b a b Channel -10% +10% -10% +10% -15% +15% -15% +15% -20% +20% -20% +20% 1 2,082 2,545 2,082 2,545 1,967 2,661 1,967 2,661 2,395 3,593 2,395 3, ,114 2,583 2,114 2,583 1,996 2,701 1,996 2,701 2,414 3,621 2,414 3, ,082 2,545 2,082 2,545 1,967 2,661 1,967 2,661 2,255 3,382 2,255 3, ,184 2,669 2,184 2,669 2,062 2,790 2,062 2,790 2,575 3,863 2,575 3, ,148 2,626 2,148 2,626 2,029 2,745 2,029 2,745 2,351 3,526 2,351 3, ,232 2,728 2,232 2,728 2,108 2,852 2,108 2,852 2,505 3,757 2,505 3,757 Reviewed By: Date: Page 3 of 3

23 Daily Function Check Report Date: 8/19/2013 System ID: 1 Meter Type: 4612 Serial Number: PR Detector Type: Serial Number: Zone Area: 100 cm² Alpha Source: Th-230 Serial Number: Emission Rate: 9,910 cpm Beta Source: Tc-99 Serial Number: L Emission Rate: 13,600 cpm Th-230 (cpm) Tc-99 (cpm) Blank (cpm) Date/Time Channel HV a b a b a b a b Initials Flag 8/19/ :01:13 AM TA 8/19/ :01:13 AM TA 8/19/ :01:13 AM TA 8/19/ :01:13 AM TA 8/19/ :01:13 AM TA 8/19/ :01:13 AM TA Reviewed By: Date: Page 1 of 1

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