1. Potential Doses to Individuals Screened with Whole-Body Security Screening Systems: OSL Dosimeter Measurements Craig R. Jones, CHP Fran Szrom, CHP UNCLASSIFIED June 2011

2. 2 UNCLASSIFIED Disclaimer The appearance of a manufacturers equipment does not imply endorsement of the equipment by the Army, DOD, or the Federal Government.

3. Individual Screened –General-Use: 0.25 μSv (25 μrem) per screening –Limited-Use: 0.01 mSv (1 mrem) per screening –0.25 mSv (25 mrem) per year Operators/Bystanders Annual Limit – 1 mSv (100 mrem) per year Inspection zone – operators and bystanders outside inspection zone during screening Introduction to Personnel Security Screening Systems 3 UNCLASSIFIED

4. Purpose: Evaluate potential dose to the individual being screened Field measurements – ANSI N43.17-2009 methodology (Reference Effective Dose) Energy correction, Dose conversion factors – No estimate of eye or skin doses with survey instruments Dosimeter study requires – Very large number of screenings – Automated method for initiating screenings – Using DDE as a surrogate for Reference Effective Dose 4 UNCLASSIFIED Background

5. Test Setup – Repetitive Screening 5 UNCLASSIFIED System 1: –Robotic solution –93,105 screenings –~ 2 weeks System 2: –Software solution –8,627 screenings –< 1 week

6. Test Setup - Phantoms 6 UNCLASSIFIED

7. Maximum DDE per screening: – 4,200 μSv/93,105 screenings = 0.045 μSv (4.5 μrem) Average DDE per screening: – 3,559 μSv/93,105 screenings = 0.038 μSv (3.8 μrem) Minimum DDE per screening: – 2,560 μSv/93,105 screenings = 0.027 μSv (2.7 μrem) 7 UNCLASSIFIED System 1: Deep Dose Equivalent Screenings to Reach 0.25 mSv (25 mrem) AnnualWeeklyDaily Max DDE5,54210715 Avg DDE6,54012618 Min DDE9,09217525

8. Maximum LDE per screening: – 8,450 μSv/93,105 screenings = 0.091 μSv (9.1 μrem) Average LDE per screening: – 6,226 μSv/93,105 screenings = 0.067 μSv (6.7 μrem) Minimum LDE per screening: – 4,710 μSv/93,105 screenings = 0.051 μSv (5.1 μrem) 8 UNCLASSIFIED System 1: Lens Dose Equivalent Screenings to Reach 15 mSv (1500 mrem) AnnualWeeklyDaily Max LDE165,2753,178454 Avg LDE224,3294,314616 Min LDE296,5135,702815

9. Maximum SDE per screening: – 15,050 μSv/93,105 screenings = 0.162 μSv (16.2 μrem) Average SDE per screening: – 10,552 μSv/93,105 screenings = 0.113 μSv (11.3 μrem) Minimum SDE per screening: – 7,420 μSv/93,105 screenings = 0.080 μSv (8.0 μrem) 9 UNCLASSIFIED System 1: Shallow Dose Equivalent Screenings to Reach 50 mSv (5 rem) AnnualWeeklyDaily Max SDE309,3195,948850 Avg SDE441,1638,4841,212 Min SDE627,39212,0651,724

10. System 2 10 UNCLASSIFIED

11. Maximum DDE per screening: – 540 μSv/8,627 screenings = 0.063 μSv (6.3 μrem) Average DDE per screening: – 416 μSv/8,627 screenings = 0.048 μSv (4.8 μrem) Minimum DDE per screening: – 250 μSv/8,627 screenings = 0.029 μSv (2.9 μrem) 11 UNCLASSIFIED System 2: Deep Dose Equivalent Screenings to Reach 0.25 mSv (25 mrem) AnnualWeeklyDaily Max DDE3,9947711 Avg DDE5,18410014 Min DDE8,62716624

12. Maximum LDE per screening: – 650 μSv/8,627 screenings = 0.075 μSv (7.5 μrem) Average LDE per screening: – 516 μSv/8,627 screenings = 0.060 μSv (6.0 μrem) Minimum LDE per screening: – 280 μSv/8,627 screenings = 0.033 μSv (3.3 μrem) 12 UNCLASSIFIED System 2: Lens Dose Equivalent Screenings to Reach 15 mSv (1500 mrem) AnnualWeeklyDaily Max LDE199,0853,829547 Avg LDE250,7854,823689 Min LDE462,1618,8881,270

13. Maximum SDE per screening: – 780 μSv/8,627 screenings = 0.090 μSv (9.0 μrem) Average SDE per screening: – 577 μSv/8,627 screenings = 0.067 μSv (6.7 μrem) Minimum SDE per screening: – 280 μSv/8,627 screenings = 0.033 μSv (3.3 μrem) 13 UNCLASSIFIED System 2: Shallow Dose Equivalent Screenings to Reach 50 mSv (5 rem) AnnualWeeklyDaily Max SDE553,01310,6351,519 Avg SDE747,57414,3762,054 Min SDE1,540,53629,6264,232

14. Both systems evaluated comply with the ANSI/HPS N43.17-2009 dose per screening limit for general-use DDE is comparable to the Reference Effective Dose (ANSI/HPS N43.17-2009) The annual number of screenings per individual is limited by the DDE/Reference Effective Dose, not LDE or SDE. 14 UNCLASSIFIED Summary Dose per Screening ( μ Sv ( μ rem)) Avg DDERef Eff Dose System 10.038 (3.8)0.033 (3.3) System 20.048 (4.8)0.046 (4.6)