CIS Safety

Spring 2023 Safety Pause

High Hazard Restart Process

• Sharepoint Link

LOTO Restart Process for OSP/LOSP/TOSP work control documents

• media:HEC Restart Process 052323 draft final.pdf
• media:HEC Restart Checklist 052323 draft final.pdf

SLAC Electrical Shock Discussion and JLAB LOTO Restart Process

• media:SLAC Electrical Shock Accident Investigation Report - Final.pdf
• Video of SLAC electrical event discussion, May 19, 2023
• Slides from 6/13/23 group meeting media:230612_CIS_LOTO.pptx

CIS Specific OSPs

Submitted

6/16/23 - complete list by ACC division => media:Accelerator OSPs 20230616-CIS.xlsx

• CEBAF gun HV processing without Accelerator Injector segment PSSCEBAF gun HV processing without Accelerator Injector segment PSS valid through 3-20-3026

• CEABAF Wien filter high voltage measurement using voltage divider box valid through 11/19/2023: Wien filter high voltage measurementMedia:operational_safety_procedure_form_108912.pdf

• GTS operations OSP, valid through11/23/2025

• GTS HVPS OSP including LOTO procedures valid through11/4/2023

• LERF Gun High Voltage Conditioning OSP, valid through 11/10/2021 Media:LERF gun OSP HV conditioning_80619_signed-off.pdf

Draft

• CEBAF Battery Bias Box, Draft OSP media:DraftOSP_Battery_bias_box_maintenance.docx and Task Hazard Analysis media:draftTHA_battery_bias_box_maintenance.docx

• LERF Gun photocathode re-cesiation (QE replenishing) DRAFT procedure Media:LERF Gun photocathode re-cesiation OSP.docx

Incomplete or another group

• DC Power OSP De-energizing 10 Amp Trim Rack with application of Lock, Tag and Try (LT&T) at CEBAF, LERF, UITF, GTS (ENG-20-103293-OSP) : https://mis.jlab.org/mis/apps/mis_forms/operational_safety_procedure_form.cfm?entry_id=103293

• DC Power OSP De-energizing 10 Amp Trim Rack with application of Lock, Tag and Try (LT&T) at CEBAF, LERF, UITF, GTS (ENG-20-103293-OSP) : https://mis.jlab.org/mis/apps/mis_forms/operational_safety_procedure_form.cfm?entry_id=103293

SF6 Systems

Operated as a Pressure Vessel

• CEBAF SF6 HVPS pressure vessel - ASME 100 psi https://jlabdoc.jlab.org/docushare/dsweb/View/Collection-38417

• UITF SF6 HVPS pressure vessel - ASME 100 psi:https://jlabdoc.jlab.org/docushare/dsweb/View/Collection-25492

• DILO SF6 Transfer and Recovery Cart (2019 unit)(original) <a href="https://jlabdoc.jlab.org/docushare/dsweb/View/Collection-49572">https://jlabdoc.jlab.org/docushare/dsweb/View/Collection-49572</a>
• Alteration #1 - SF6 10 psi R28 resistor tank: <a href="https://jlabdoc.jlab.org/docushare/dsweb/View/Collection-49570">https://jlabdoc.jlab.org/docushare/dsweb/View/Collection-49570</a>
• Alteration #2 - 500 kV SF6 10 psi HV chamber: https://jlabdoc.jlab.org/docushare/dsweb/View/Collection-49571

• DILO SF6 Transfer and Recovery Cart (2013 unit)(original): <a href="https://jlabdoc.jlab.org/docushare/dsweb/View/Collection-19051">https://jlabdoc.jlab.org/docushare/dsweb/View/Collection-19051</a>
• Copy of 19051 but with two alterations: <a href="https://jlabdoc.jlab.org/docushare/dsweb/View/Collection-22091">https://jlabdoc.jlab.org/docushare/dsweb/View/Collection-22091</a>
• Alteration #1 - SF6 10 psi R28 resistor tank: <a href="https://jlabdoc.jlab.org/docushare/dsweb/View/Collection-49570">https://jlabdoc.jlab.org/docushare/dsweb/View/Collection-49570</a>
• Alteration #2 - 500 kV SF6 10 psi HV chamber: https://jlabdoc.jlab.org/docushare/dsweb/View/Collection-49571

NOT Operated as a Pressure Vessel

• GTS SF6 HVPS Pressure vessel - ASME 15 psi(original): https://jlabdoc.jlab.org/docushare/dsweb/View/Collection-2455
• (copy of 2455): https://jlabdoc.jlab.org/docushare/dsweb/View/Collection-2729
• GTS Description of HVPS SF6 vessel and gas flow Media:GTS-SF6 Automatic Gas Transfer System by Kevin Jordan 2007 uopdated by Carlos 2021.pptx
  • LERF Description of HVPS SF6 vessel and gas flow Media:LERF-FEL SF6 transfer system overview documented September 2021.pptx

Official documents managed via document-control for CEBAF

• CEBAF accelerator MEDCON 5 loading limits (IH1000-04g), circulated S. Hoey 9/29/20: media:loading limits_CEBAF ih1000004g_v4.docx
• IH Exposure Assessment: Injector Tunnel, Sulfur hexafluoride (SF6) (IH Project # 18OT137) Prepared by: Jennifer Williams, CIH media:18OT137.pdf
• CEBAF Injector Power Supply SF6 Tank & 350 kV Receptacle (PS-ACC-17-001) https://jlabdoc.jlab.org/docushare/dsweb/View/Collection-38417
• CEBAF Industrial Hygiene Assessment for SF6 exposure evaluated June 2018 by Jennifer Williams : requested link to official assessment
• TL1137 MicroMott Polarimeter Operation Approved July 2020 Expires Aug 2023 https://misportal.jlab.org/mis/apps/mis_forms/operational_safety_procedure_form.cfm?entry_id=103187

Other documents NOT managed via document-control

• SF6 Inventory log and calculation sheets are located at:O:\inj_group\SF6 Gas Management and Inventory
• Task Hazard Analysis for NEG sputter coating media:THA_NEGSputtering.docx
• NFPA posting for chambers containing NEG materials from Jennifer Williams media:NEG component_ nfpa.docx