Evaluate radioactivity in the rock at Henderson

1. Evaluate radioactivity in the rock at Henderson Proposed first generation LBCF at Henderson DUSEL

2. Don’t put it underground unless it’s absolutely necessary When you do, Go Deep

3. Harrison Mountain Elev. 12,300 ft Red Mountain Elev. 12,300 ft RedMountain Porphyry Silver Plume Granite Silver Plume Granite Henderson Orebody Urad Porphyry 7500 Level 7065 Level Central Campus Elev. 6800 ft, (4300 mwe) Access Ramps Henderson Granite Midway Campus Elev. 5850 ft, (5100 mwe) Lower Campus Elev. 4900 ft. (5800 mwe)

4. DUSEL-12 DUSEL-19 ------------------------- DUSEL-01-367’ DUSEL-01-957’ DUSEL-01-1507’ DUSEL-01-2346’ DUSEL-01-2422’

5. Gamma Ray Analysis of Henderson Cores

6. No chemistry Direct counting 24 hours Standardized source 8keV – 1836 keV

7. Objectives Locate discrete peaks in spectrum Identify gamma emitting iostopes Compare with U and Th series Any surprises ? Determine radioactivity Project U and Th Concentrations Use Results as Source terms for LBCF Shielding and Design

9. Results All Identifiable Peaks Associated with Natural Background Estimates of Radioactivity restricted to peaks > 100 keV No trends identified with Old vs New cores or depth of core

11. Estimates of Th and U projected from Isotopes before Radon in each series.

12. Core Analysis Peter Sprenger Aaron Zimmerman

13. Harrison Mountain Elev. 12,300 ft Red Mountain Elev. 12,300 ft Shaft Silver Plume Granite Silver Plume Granite Henderson Orebody Urad Porphyry Primos Porphyry Upper Campus Elev. 8100 ft, (2500 mwe) Access Ramps Internal Shaft Henderson Granite

14. Upper Campus Layout

15. LBCF:Upper Campus 2500 mwe Location available early Easy access from surface Provide service to first round of experiments while central and lower campuses are under construction

16. LBCF:Upper Campus Screening of components Detector development Low Level Counting research

17. LBCF:Upper Campus Comprehensive facility Competent staff Emphasize QA/QC Component quarantine Close to chemistry laboratory Close to electroforming facility

18. LBCF:Upper Campus Clean room conditions Radon control (ventilation) Flexible floor plan

19. Pass Incoming Fail

20. Pass g g g g g Incoming Fail

22. Pass g g g g g b Incoming Fail   

23. LBCF:Upper Campus Ultra low shielded vault Radon abatement Flexible floor plan

24. Pass g g g g    Incoming Fail b

25. Upper Campus Layout

26. Upper Campus Layout Corridor Office

27. Thank You

29. Thank You

31. Upper Campus Layout

33. All Identifiable Peaks Associated With Natural Background Estimates of Radioactivity Restricted to peaks > 100 keV Estimates of Th and U projected from Isotopes before Radon in each series.

34. Objectives Locate discrete peaks in spectrum Identify gamma emitting iostopes Compare with U and Th series Project U and Th Concentrations Use Results as Source terms for LBCF Shielding and Design

35. Gamma Ray Analysis of Henderson Cores

37. Harrison Mountain Elev. 12,300 ft Red Mountain Elev. 12,300 ft Red Mountain Porphyry Silver Plume Granite Shaft Silver Plume Granite Henderson Orebody Urad Porphyry 1st Drill Hole Primos Porphyry 7500 Level 2nd Drill Hole 7065 Level Central Campus Elev. 6800 ft, (4300 mwe) Access Ramps Internal Shaft Henderson Granite EarthLab/ Geoscience Area Midway Campus Elev. 5850 ft, (5100 mwe) Lower Campus Elev. 4900 ft. (5800 mwe)

38. ~48”

40. Pass Incoming Fail Floor Plan

41. Objectives Locate discrete peaks in spectrum Identify gamma emitting iostopes Compare with U and Th series Project U and Th Concentrations Use Results as Source terms for LBCF Shielding and Design

42. No chemistry Direct counting 24 hours FWHM 0.6% at 350 keV Standardized source 8keV – 1836 keV

43. Pass Incoming Fail () High purity Ge (a) Si Surface barrier (b) Proportional counters Sample Storage Room (a,b,g) Walk - in Vault Control console