Preview of the Forthcoming ANSI N43.1 Standard

James C. Liu and Scott Walker

The American National Standards Institute (ANSI) N43.1 document, Radiation Safety for the Design and Operation of Particle Accelerators, is near its final phase of review and revision. It is expected that the standard will be submitted to ANSI N43 for approval in mid-2005. This is to give the readers of the Accelerator Radiation Safety Newsletter a preview of the main contents of the standard. The standard has the following table of contents.

• Chapter 1 Purpose and Scope
• Chapter 2 Terms and Definitions
• Chapter 3 Radiation Safety Program
  • 3.1 General
  • 3.2 Organization and Administration
  • 3.3 Hazard Identification and Safety Assessment
  • 3.4 Design and Implementation of Safety Controls and Monitoring
  • 3.5 Accelerator Operations
  • 3.6 Operational Radiation Safety
  • 3.7 Training and Qualification
  • 3.8 Program Review and Performance Evaluation
  • 3.9 Quality Assurance, Quality Control, and Documentation
• Chapter 4 Radiation Safety System (RSS)
  • 4.1 General
  • 4.2 Features of Radiation Safety System
  • 4.3 Requirements and Guidance
  • 4.4 Radiation Not Related To Beam
  • 4.5 Induced Radioactivity
• Chapter 5 Access Control System (ACS)
  • 5.1 Purposes
  • 5.2 Graded Approach
  • 5.3 System Features
  • 5.4 Beam Inhibiting Devices
  • 5.5 Interlocks
  • 5.6 Review
  • 5.7 Certification and Check
• Chapter 6 Radiation Control System (RCS)
  • 6.1 General
  • 6.2 Performance Requirements
  • 6.3 Passive Systems: Shielding and Fences
  • 6.4 Active Systems
  • 6.5 Administrative Controls
• Chapter 7 Accelerator Operations
  • 7.1 General
  • 7.2 Readiness Review
  • 7.3 Operating Practices
  • 7.4 Test, Routine Maintenance, and Unscheduled Repairs
  • 7.5 Interlock Bypasses and Deviations from Procedures
  • 7.6 Emergency Response
• Chapter 8 Operational Radiation Safety
  • 8.1 General
  • 8.2 Personnel Dosimetry
  • 8.3 Area Monitoring
  • 8.4 Radiation Surveys
  • 8.5 Environmental Protection and Monitoring
  • 8.6 Instrumentation and Calibration
  • 8.7 Control of Induced Radioactivity
  • 8.8 Management of Radioactive Material and Waste
  • 8.9 Facility Decommissioning
• Chapter 9 Training and Qualification
  • 9.1 General
  • 9.2 Procedures and Records
  • 9.3 Training Requirements
  • 9.4 Radiation Safety Training Program
  • 9.5 Training Topics
  • 9.6 Instructor Qualifications
• Appendix A Development of Safety Assessment Document (SAD)
• Appendix B Interlocked-Type Access Control System (ACS)
• Appendix C Decommissioning
• Appendix D Measurements of Radiation and Radioactivity References and Resources

The standard sets requirements for accelerator facilities that have to be met in order to provide adequate protection for workers, public, and the environment from the hazards of ionizing radiation produced during and from accelerator operation. This standard also sets forth good practices that, if followed, will provide a level of protection consistent with those established in the accelerator communities. The standard sets the requirements and recommended practices that are graded according to the complexity and hazard levels of the facility.

The standard applies to the design, installation, operation, maintenance, upgrade, and decommissioning of accelerator facilities. It applies to all phases in the life cycle of the facility for which there would be a meaningful application. The standard specifies the requirements and recommendations for both management and technical aspects of the program.

The standard is suitable for all accelerator facilities (using electron, positron, proton, or ion particles) capable of producing radiation subject to federal and state regulations, except for those facilities that use accelerators solely for medical human-use purposes (e.g., hospitals using medical accelerators for radiotherapy).

The ANSI N43.1 committee has the following membership.

• Ted de Castro(Lawrence Berkeley National Laboratory [LBNL])
• John Drozdoff (Tri-University Meson Facility [TRIUMF], Canada)
• Wesley M. Dunn (Texas State Department of Health and Safety, retired)
• Olin Van Dyck (Los Alamos National Laboratory [LANL), retired)
• Albert E. Evans (U.S. Department of Energy [USDOE], retired)
• Roger Kloepping (Lawrence Berkeley National Laboratory [LBNL], retired)
• Larry Larson (Sematech)
• James C. Liu (Stanford Linear Accelerator Center [SLAC]), co-chair
• Robert May (Thomas Jefferson National Accelerator Laboratory [TJNAF])
• Norman Rohrig (Idaho National Engineering and Environmental Laboratory [INEEL], retired)
• Paula Trinoskey (Lawrence Livermore National Laboratory [LLNL], retired)
• Vashek Vylet (Duke University)
• Scott Walker (Los Alamos National Laboratory [LANL]), co-chair