Program Manager’s Review

1. Program Manager’s Review Dosimetry Program Henry Tran (James Liu) September 19, 2005

2. Program Purposes • Ensure the occupational doses to SLAC employee/users/visitors are properly monitored and/or evaluated by personnel dosimetry (external and internal) programs. • Ensure the ambient doses in SLAC workplaces are properly monitored by area monitoring program. • Support the SLAC program and mission needs: • Ensure the accelerator and beamline components are properly protected from radiation damage by high-level dosimetry program. • Perform R&D in dosimetry area.

3. Legal Requirements ES&H ISMS: Work Smart Standards 10 CFR 835.402(a) requires that monitoring of individual exposures to external radiation shall be performed in accordance with the following: Personnel dosimeters shall be provided to and used by radiological workers who, under typical conditions, are likely to receive an effective dose equivalent to the whole body of 0.1 rem or more in a year; a shallow dose equivalent of 5 rem to the skin or to any extremity; dose equivalent of 1.5 rem to the lens of the eye; a deep dose equivalent of 5 rem to any organ or tissue other than the lens of the eye from external radiation. Personnel External Dosimetry Programs shall be adequate to demonstrate compliance with 10 CFR 835.202, including routine dosimeter calibration and conformance with the requirements of DOELAP [10CFR835: 402(b)]. The specific requirements of DOELAP may be found in DOE-STD-1095-95, Department of Energy Laboratory Accreditation Program for Personnel Dosimetry. Program Requirements

4. Best Practices SLAC Program /Mission Needs SLAC-wide ES&H Goals https://www.internal.slac.stanford.edu/esh/divreports/fy04qr2.pdf ES&H and RP 5 Year Plans Program Requirements

5. Program Vision • World-class dosimetry programs and recognized dosimetry expertise and capability to meet SLAC program/mission needs. • External dosimetry program in compliance with DOELAP and excellent performance (ISO-certified in the future) • Well documented Internal dosimetry program • Centralized area monitoring program

6. Program Descriptions • Personnel External Dosimetry • Entire SLAC population: RWT workers (quarterly - 700), GERT workers (annual - 2200), users & visitors (monthly - 500). • Photon and neutron doses only • Landauer provides processing service • Issuing, distributing, collecting, processing, data maintaining, QA/QC, dose investigating • Dose record and report management using ODTS (post 1972) • Annual DOE REMS report • DOELAP accreditation 2-yr cycle (until October 20, 2006) • Personnel Internal Dosimetry • TBD to demonstrate no need for routine bioassay • Procedures and arrangement for special bioassay needs • Ability to estimate and evaluate internal dose

7. Program Descriptions • Area Monitoring • FO/RPG/DREP (area/event monitoring programs) • More than 250 locations around SLAC • Neutron and photon doses monitored with Panasonic system • Exchanged every 6 months • Centralized dose record and reporting system • High-level dosimetry • RPG/DREP/FO joint effort • PEP-II ring equipment high-dose monitoring since 1997 • SPEAR3 and LCLS insertion devices in the near future • Misc. (BaBar, GLAST, etc.) • TLDs (Panasonic system), optical devices, Si-based devices, etc.

8. Centralized Area Monitoring

9. Program Performance DOELAP accredited for > 10 yrs! Timely, high-quality dose results for SLAC workers serve as a powerful indicator of the quality of the Radiation Protection Program.

10. Self Assessment Methodology • Process-based: • DOELAP official assessment • DREP self-assessment • Customer feedback • Index-based: • Number of lost dosimeters • Timely completion of dose investigation • Review of positive doses and collective doses