Simplified Digital Mapping of REMP Sampling Locations

1. Simplified Digital Mapping of REMP Sampling Locations Ken Sejkora Entergy Nuclear Northeast – Pilgrim Station Roger Tolbert Entergy Nuclear South – Grand Gulf Presented at the 12th Annual RETS-REMP Workshop Atlantic City, NJ: 24-26 Jun 2002

2. Why Have Good Maps? • Required by NUREG-1301/1302, Branch Technical Position, Tech Specs, ODCM • Makes determining distance and direction to sampling and receptor locations easier, plus more accurate • Good augmentation to ODCM and Annual Reports • It’s the right thing to do!

3. Key Elements to Software-based Mapping • Mapping software • What are your needs? • How do you intend to use it? • Stand-alone, or augment with GPS? • GPS receiver • Accuracy with portability! • Features – ‘bells and whistles’ • Use with mapping software?

4. Mapping Software Considerations • Map datum used as basis • GPS capability of software • Real-time plotting of GPS output • Storage download of waypoints, trails • Printing capability • Map save/export capability: ODCM, reports • Drawing function to overlay compass rose, icons • Operating platform: Windows vs. Mac • USA coverage good, Canada/foreign ??

5. Mapping Software Selection • Delorme Street Atlas • Delorme Topo USA • Rand McNally StreetFinder • Microsoft MapPoint • Microsoft Streets • GPS receiver-specific maps

6. GPS Receiver Considerations • Waypoint Storage: 500 typical • Plot trail, “breadcrumbs”; number of points • Data port: link to PC • Map Display: GPS displays where you’re at • WAAS capability: Wide Area Augmentation System… increase accuracy • Software updateable – flash ROM • No display – feed directly to mapping program via serial port

7. GPS Receiver Selection • Garmin: http://www.garmin.com/outdoor/ • Magellan: http://www.magellangps.com/ • Trimble: http://www.trimble.com/producttypes.html • Lowrance: http://www.lowrance.com/Outdoor/default.asp • Palm-Pilot PDA add-on • Direct-feed, no display… Delorme Earthmate http://www.delorme.com/earthmate/default.asp

8. Other Software & GPS Links • Spreadsheets: http://hps.ne.uiuc.edu/rets-remp/software.htm • Distance & Direction • Compass Rose • ExpertGPS: http://www.expertgps.com/ • G7TOWIN: http://home.attbi.com/~g7towin/ • NMEAgent: http://www.iliketheinternet.com/gps.html • SAWatch: http://www.huntting.com/sawatch/ • Others/Links: http://www.joe.mehaffey.com/

9. Applications • Real-time tracking – land use census • Waypoint storage – nearest resident, farm, garden, milk animal, REMP sampling locations, TLDs • Accurate distance and direction/sector for X/Q,D/Q calcs, dose calcs, etc. • Aerial map interface – ExpertGPS software, cursor LAT/LON

10. Map TLD Locations

11. Land Use Census Track

12. Grand Gulf Nuclear Station2001 Land Use Census • Why use GPS and GPS Software • Validate distances to current locations • Validate correct sectors are used • Obtain accurate distances to new locations • Determine if any hard-to-reach areas may need investigating

13. Grand Gulf Nuclear Station2001 Land Use Census • Used TopoGrafix ExpertGPS software • Aerial view maps from Microsoft TerraServer • Topographic Maps from USGS • Garmin Etrex Vista GPS • County 911 Services for addresses • Door to door survey

14. Grand Gulf Nuclear Station2001 Land Use Census • Other Uses • Site overview for NPDES permitting • Verification of Site Boundary • Assist in locating new sample locations • TLD location mapping and distances • Providing aerial views for everyone’s house

15. Grand Gulf Nuclear Station2001 Land Use Census • Methods • Zoom in and mark the roof top as a waypoint at your desk, then upload the waypoints to GPS to verify in the field Or… • Go to the field, mark the location on the GPS, and then download to Software to verify.

18. Zoom in and mark roof top using the software

19. Zoom out to get big picture • Include Sector lines as waypoints

20. Data can be sorted by bearing or distance and printed or exported to spreadsheet.

21. Concerns • Map datum used for basis • Local maps – may not have good pedigree • Plant maps – pedigree? State plane? • USGS Topo Quads – many NAD27, some converted to NAD83/WGS84 • Software maps – most NAD83, some NAD27, ?? • Coordinate conversion software? It is available. • Poor satellite coverage – greater uncertainty on position… address by using location averaging

22. Concerns • Might discover your REMP locations are not where you thought they were… need to relocate to cover the sector, distance, etc.? • Keep from historical perspective? • Move to desired location? $$ to move • Add additional location? $$ to collect and analyze more samples

23. Bottom Line -- Cost • Mapping Software • Desktop/Laptop mapping: $30-$100 • GPS receiver-specific: $100-$200 • GPS Receiver • Non-data port: <$100-$200 • Non-mapping, data port: $150-$250 • Map display, data port: $250-$400

24. Summary/Benefits • Readily available: K-Mart, Wal-Mart, computer stores, mail order, web • Relatively low cost: ~$200 for GPS receiver and software • Easy to use: point-and-click • Powerful, robust: better than map-and-ruler, cut-and-paste • Accurate: 20 meter easily achievable; Selective Availability off since 01-May-2000