APS-3.1.2.1.0, Rev. 5 (APS_1188832) ARGONNE NATIONAL LABORATORY 9700 South Cass Avenue, Lemont, Illinois 60439 ADVANCED PHOTON SOURCE SAFETY ASSESSMENT DOCUMENT June 2017 (Addendum 1 added September 2019) work sponsored by U.S. DEPARTMENT OF ENERGY Office of Science APS Safety Assessment Document Change Record September 2019 The APS Final Safety Assessment Document was issued in 1996 as part of the APS construction activity. Revision 1 was made in May 1998 to add the top-up operating mode and to document the conversion to operation with electrons. The Safety Envelope was not changed in this revision. Revision 2 added several APS improvements and many minor updates in keeping with the effort to keep the SAD as an accurate description of the APS and its safety analysis. There was no change in the APS Safety Envelope in this revision. Many of the changes were minor language clarifications while some were chronological tense updates, such as "The APS will measure ..." was changed to "The APS measures ..." Revision 3 documented the removal of the third, hardwired interlock chain from the Access Control Interlock System (ACIS) as reviewed and approved by the APS Radiation Safety Policy and Procedure Committee in April 2006. It also made corrections to the acronyms refering to APS divisions due to the APS reorganization of April 2006. The mission descriptions were also updated for the three APS divisions due to the APS reorganization of 2006. Revision 4 documented numerous minor changes to accelerator system technical descriptions to ensure those descriptions addressed the current APS configuration. Various beamline associate descriptive material was removed as being superflous to the SAD hazard analysis and accelerator safety envelope. Many editorial changes were made to correct previously missed textual or factual errors. The material previously included in the revision addendum has now been incorporated into the SAD. References were updated as needed to reflect current DOE safety requirement which Argonne programs must follow. Revision 5 documented the removal of the LEUTL and the inclusion of the Linac Extension Area (LEA). Revision 5 also updated Safety Interlocks information to describe current configurations. Many editorial changes were made to correct pre viously missed textual or factual errors. Addendum 1 was added in September 2019 and includes corrections to Section 3.11.2 Personnel Safety System and Section 3.12.1 Shielding Policy (last paragraph only) that include the Personnel Safety System Gen 4 systems. iii iv APS Safety Assessment Document Table of Contents June 2017 Table of Contents ACRONYMS ............................................................................................................................... xxi UNIT ABBREVIATIONS ......................................................................................................... xxix ABSTRACT ............................................................................................................................. xxxiii 1.0 INTRODUCTION ........................................................................................................... 1-1 1.1 Objective of Document ................................................................................................ 1-1 1.2 Advanced Photon Source Facility Description ............................................................ 1-1 1.3 Scope of Document ...................................................................................................... 1-5 1.4 Document Layout ......................................................................................................... 1-9 2.0 SUMMARY AND CONCLUSIONS .............................................................................. 2-1 2.1 Hazard Analysis Methodology .................................................................................... 2-1 2.2 Summary of Results ..................................................................................................... 2-1 3.0 APS FACILITY, SITE AND OPERATIONS DESCRIPTION ...................................... 3-1 3.1 Policy and Organization ............................................................................................... 3-1 3.1.1 APS Safety Policy .................................................................................................... 3-1 3.1.2 Argonne and APS Organizations ............................................................................. 3-3 3.1.3 APS Users ................................................................................................................ 3-4 3.1.3.1 User Access and Safety Training.................................................................... 3-4 3.1.3.2 Sector Safety Plans ......................................................................................... 3-4 3.1.3.3 User Experiment Safety Review..................................................................... 3-5 3.1.4 Beamline Review and Commissioning .................................................................... 3-5 3.1.4.1 Beamline Operations Oversight...................................................................... 3-6 3.1.5 Safety Training......................................................................................................... 3-6 3.1.6 Argonne Safety Responsibility ................................................................................ 3-6 3.1.7 Fire Protection .......................................................................................................... 3-6 3.1.7.1 Introduction .................................................................................................... 3-6 3.1.7.2 Site-Wide Fire Protection Systems and Support Organizations ..................... 3-8 3.1.8 Waste Handling, Storage, and Disposal ................................................................... 3-9 3.1.9 Emergency Management ......................................................................................... 3-9 3.2 APS Site ..................................................................................................................... 3-10 3.2.1 Introduction and Site Description3- ....................................................................... 3-10 3.2.2 Population Distribution .......................................................................................... 3-10 3.2.3 Environmental Features ......................................................................................... 3-13 3.2.4 Geology and Seismology ....................................................................................... 3-14 3.2.5 Cultural Resource Compliance .............................................................................. 3-16 v APS Safety Assessment Document Table of Contents June 2017 3.2.6 Environmental Compliance ................................................................................... 3-16 3.2.7 Wetland Mitigation Monitoring ............................................................................. 3-18 3.3 APS Linac System Technical Facilities Description ................................................. 3-20 3.3.1 General Overview .................................................................................................. 3-20 3.3.2 Electron Gun Systems ............................................................................................ 3-21 3.3.2.1 Thermionic rf Electron Gun Systems ........................................................... 3-21 3.3.2.2 Photocathode rf Gun System ........................................................................ 3-24 3.3.2.3 Laser System ................................................................................................ 3-25 3.3.3 Linac rf Accelerating System ................................................................................. 3-26 3.3.4 Linac RF Waveguide Switching System ............................................................... 3-27 3.3.5 Upstream Electron Linac ....................................................................................... 3-28 3.3.6 Bunch Compressor ................................................................................................. 3-29 3.3.7 Downstream Electron Linac .................................................................................. 3-31 3.3.8 Linac Operating Conditions ................................................................................... 3-33 3.4 APS Linac Extension Area (LEA) - Technical Facilities Description ...................... 3-33 3.4.1 General Overview .................................................................................................. 3-33 3.4.2 PAR and Booster Bypass Beamline Systems ........................................................ 3-34 3.4.2.1 PB and BB Beam Transport Line DC Magnets ............................................ 3-36 3.4.2.2 PB and BB Beam Transport Line Vacuum Systems .................................... 3-38 3.4.2.3 PB and BB Beam Transport Line Diagnostics ............................................. 3-38 3.4.3 LEA Tunnel Beam Transport Line System ........................................................... 3-38 3.4.4 LEA End Station .................................................................................................... 3-39 3.4.5 LEA Operating Envelope ....................................................................................... 3-39 3.5 APS Particle Accumulator Ring Technical Facilities Description ...........................