Operational Readiness Clearance

Preparing for ORC Inspection


Each time an approved test beam experiment sets up in the beamline it must obtain an Operational Readiness Clearance (ORC) before actually taking beam. This consists of an inspection of the equipment by the Particle Physics Division Safety Committee and an inspection of the enclosures by the Accelerator Division Radiation Safety Officer. See Getting Started with ORCs

  • Two weeks before the scheduled ORC Inspection users must submit:
    1. Simplified (block) electrical diagram of entire installation, including commercial components, with special emphasis on power handling issues. These must be of sufficient detail that reviewers can verify the experimenters have observed good systems engineering practices and have used proper fusing, wire sizes, insulation, termination, etc.
    2. Line diagrams of custom manufactured circuitry or modifications of commercial components of similar detail.
  • At least 48 hours ahead of time, The FTBF Coordinator will contact the PPD Committee Chairman, and the AD RSO, to arrange a time for inspecting the equipment.

Due to the ORC process, beam can NOT be guaranteed for the same day, and extensions will not be made. Please make your request appropriately.

Obtaining Operational Readiness Clearance


The full set of information that constitutes official guidelines is in FESHM. The Inspection is based largely on the Hazard Awareness Checklist, which constitutes the last page(s) or the experiment's TSW.

PPD ES&H Experiment Review Committee for ORC Approval

  • Cryogenics
  • Electrical Equipment
    • Electrical Safety ORC Review Tips PDF
    • 2 weeks before the scheduled ORC Inspection users must submit:
      1. Simplified (block) electrical diagram of entire installation, including commercial components, with special emphasis on power handling issues. These must be of sufficient detail that reviewers can verify the experimenters have observed good systems engineering practices and have used proper fusing, wire sizes, insulation, termination, etc.
      2. Line diagrams of custom manufactured circuitry or modifications of commercial components of similar detail.
  • Flammable Gasses or Liquids
  • Other Gas Emissions
    • example: Gas Chambers
    • Environmental Safety ORC Review Tips PDF
    • Greenhouse gases, air pollutants, or scrap, waste, etc. may trigger the need for a NEPA permit
    • The need for a NEPA permit may delay installation for three months
  • Hazardous/Toxic Materials
  • Pressure Vessels
  • Vacuum Vessels
  • Radioactive Sources
    • are they being used as a calibration (temporary use) or do you need them in the enclosure while beam is being run (permanent installation)?
    • you will need Source Training
  • Target Materials
    • certain materials require additional training for handling
    • targets require additional safety reviews/inspections/approval
  • Lasers
  • Hazardous Chemicals
    • Any experiment using flammable, corrosive, reactive, or toxic materials will need to post the Material Safety Data Sheets at the entrances of the enclosure.
    • MSD sheets can be found here.
  • Mechanical Structures

A Fire-Life Safety Review is part of the ORC review. Guidelines

  • As a general practice, the use of combustibles within FTBF should be limited. If there are questions regarding the combustibility of building materials (cables, foam board, plastics, etc.), please obtain a sample of the material and contact the FTBF Coordinator. There is a system in place to test these materials.

In addition, the Accelerator Division Radiation Safety Group inspects the area to look for issues that may result in adverse radiological consequences, each time an experiment sets up to take beam. AD Rad Safety Checklist.

ORC Approval Process