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SAD/ASE Lessons Learned

SAD/ASE Lessons Learned. Phil Mutton August 13, 2008. A Safety Re-Assessment at Jefferson Lab in Accordance with DOE-O-420.2B. Background. 2002 Current version Rev 5 (ASE is included in JLab FSAD) 2005 Accelerator Safety Order (ASO), DOE-0-420.2B

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SAD/ASE Lessons Learned

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  1. SAD/ASE Lessons Learned Phil Mutton August 13, 2008 A Safety Re-Assessment at Jefferson Lab in Accordance with DOE-O-420.2B

  2. Background • 2002 Current version Rev 5 (ASE is included in JLab FSAD) • 2005 Accelerator Safety Order (ASO), DOE-0-420.2B • Establish accelerator-specific safety requirements • Distinguish from other supplementary safety and health requirements (e.g., Worker Safety and Health Program) • Clearly document analysis, controls, and basis for accelerator safety envelope • 2006 M&O contract awarded to Jefferson Science Associates • 2007 DOE and Independent reviews of current FSAD • 2008 FSAD Revision 6 Project • Update FSAD to Rev 6 will achieve ASO compliance

  3. Final Safety Assessment Document (FSAD) Revision Project • Findings with respect to the ASO • Update FSAD and Accelerator Safety Envelope (ASE) • we are here (8/12/08) • Final review and approval of FSAD/ASE • Next steps: • Revise USI Process • Train staff on FSAD and USI Process

  4. Current FSAD (rev 5, 2002) • Largely conclusions • Limited description of the analysis itself • Does not describe accident scenarios • Limited description of controls or rationale for them • Too much detail of less relevant (industrial safety) topics • Accelerator Safety Envelope (ASE) includes non-accelerator related parameters (e.g. FEL laser parameters) • Basis for the ASE is not described

  5. The Project to Update the FSAD • Update FSAD – a learning exercise: • Reorganize per ASO, and address specific omissions, etc., noted by third party reviewers • 1st draft: clearer, but accident scenarios and rationale not apparent in many areas • 2nd draft: accident scenarios tabulated and controls identified, but scenarios and controls not well “connected.” ASE basis (rationale) incomplete • 3rd (hopefully final) draft: review in progress

  6. FSAD Revision 6 • Follows guidance in ASO guide, DOE-G-420.1-2 • Updates and expands description of relevant features and controls (Personnel Safety System, shielding, beam dump cooling, cryogenic systems…) • Eliminates industrial safety aspects • Adds a table of accident scenarios, identifies bounding cases • Lists Credited Controls vs. other controls (defense in depth) • Refines ASE details and describes ASE basis • Includes Shielding Policy

  7. Controls • All credited controls were in place, but were not identified as such in the existing SAD - added in rev 6 • Several administrative controls were inadequately documented (unclear or not readily traceable to requirements: • Surveillance of engineered controls • Excavation controls (near accelerator) • Training • Maintenance

  8. If I were to do it again… • Don’t assume the update is just an “adjustment” • for us this was a re-analysis • Be more self-critical of existing (pre-ASO) SAD • Spend more time up front to understand expectations behind the ASO and guide • Collaborate with reviewers/approvers on document organization (for a better first draft) • Start with a clean sheet of paper • Organize the logic • Do the analysis • Document the analysis

  9. Organize the Logic Risk Matrix Accident Scenarios Credited Controls ASE Defense in Depth Controls

  10. Organize the Logic • Design the document for ease of use • Lay out risk matrix • Define criteria for control levels • Map out the accident scenarios (~45) – start building the table • Design the controls tables, credited (~25) and defense in depth (~30) • Design the ASE layout • Map controls to ASE basis • Outline the body of the document for easy cross referencing to tables

  11. Do the Analysis • Define assumptions – fixed shielding (e.g. underground) • Populate accident scenarios, controls and ASE tables • Perform calculations, modeling, etc. • Identify or prepare supporting analysis documents Document the Details • Insert re-usable text into the new outline as appropriate • eliminate details not relevant to the analysis • Add new analysis and description details to support conclusions, provide rationale, etc.

  12. JLab FSAD Rev 6Are we there yet? • Ease of Use? • FSAD Rev 6 ~100 pages. I thought this rev would be shorter (Rev 5 was ~95 pages) • How to judge what should be in a SAD vs. Reference documents? • Does it address the “audience?” • safety analysts, USI reviewers, operators, managers, engineers, scientists, and technicians? • Success will to be judged by the document users

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