Jefferson Lab > ES&H
Privacy and Security Notice
ES&H Manual
Chapter 3320 Temporary Work Permits
Certain hazardous, recurring activities performed at Jefferson Lab are restricted and only undertaken when authorized by a temporary work permit. These work permits ensures that all hazards have been considered and associated risks have been acknowledged and mitigated.

The following activities have been identified as requiring a temporary work permit prior to execution:
Because of the severe consequences which could incur during the above noted activities, they have been provided for in separate documents as noted above. These procedures, as outlined, provide for a thorough hazard evaluation.

Referenced Documents

NOTE: Temporary Permitted Activities
When a Temporary Work Permit addresses the principal hazard issue (associated with an unmitigated Risk Code>2), the Temporary Work Permit is considered the WCD. The permit is then attached to any associated Task List(s).

If two or more temporary work permits are associated with the task, consult your Division Safety Officer (DSO), BEFORE proceeding with the task. The DSO will determine if a (T)OSP is needed for the combined hazards.
Confined Space Entry Permit
Confined Space Entry Permit (See ES&H Manual Chapter 6160 Confined Space Entry)

Jefferson Lab defines a "PRCS" to be any area that meets all of the following criteria:
  • Sufficient space for a person to enter and perform work
  • Limited/restricted means for entering/exiting
  • Not designed for continuous occupancy
  • An actual or potential hazard
Typical PRCS hazards include:
  • A hazardous atmosphere
  • Toxic materials that affect the skin or can be absorbed through it
  • A material with the potential for engulfing a person or hindering quick escape
  • Internal configuration that could trap a person
Entry is not allowed into a PRCS if there is a hazard that cannot be mitigated to RC<2 or lower by use of conventional controls (as listed on a permit). Inform the Confined Space Coordinator if this situation exists.
Energized Electrical Work
Work performed on AC electrical power distribution system at Jefferson Lab with equipment in an energized state requires an approved Energized Electrical Work Permit as described in ES&H Manual Chapter 6220 AC Electrical Equipment Safe Work Program. The permit establishes the justification for working on "live" equipment, the required training qualifications of the workers, and any unusual aspects of the work. Refer to ES&H Manual Chapter 6220 Appendix T1 Energized Electrical Work Permit (EEWP).

NOTE: Diagnostic work is permitted without an EEWP as long as it is performed in accordance with ES&H Manual Chapter 6220 AC Electrical Equipment Safe Work Program paragraph 4.1.2.

Hot Work Permit
Work that presents an inherent risk of creating a fire is restricted at Jefferson Lab. Open-flame and spark-producing activities, such as welding or soldering, are authorized by a Hot Work Permit. Refer to ES&H Manual Chapter 6900 Appendix T1 Fire Protection: Hot Work Permit.
Radiological Work
Activities which present the possibility of significant exposure to ionizing radiation are restricted at Jefferson Lab. Such activities are allowed only after careful analysis and planning to minimizing personnel exposure. Exposure must be As Low As Reasonably Achievable (ALARA). Refer to the Jefferson Lab Radiological Control Supplement.

Jefferson Lab's Radiation Control Group initiates and authorizes Radiological Work Permits (RWP). It informs workers of entry requirements and radiological conditions in the work area, and provides mechanisms to reduce worker exposure.

A Radiological Work Permit is required for any of the following situations:
  • Anticipated radiation dose rate to the trunk of a worker's body - usually measured 30 cm (1 ft) from the work piece - is greater than 25 mR/hr.
  • Total estimated dose to a worker exceeds 25 mrem.
  • Workpiece measures 250 mR/hr or greater on contact.
  • Entry into a posted contamination, High Radiation Area, or Airborne Radioactivity Area is necessary.
Contact Radiation Control at x7551 (876-1743 cell phone) to initiate a RWP.

Digging and Excavating Permit Request
See Permits are required on JLab property for any mechanized excavations or any excavation using hand tools that penetrate the ground greater than 12 inches. Before the permit can be approved, a competent person must locate and mark the utilities.
Floor, Wall and Ceiling Penetration Permit Request
See Cutting/Drilling blind penetrations into walls, floors, and ceilings at Jefferson Lab requires a Floor, Wall and Ceiling Penetration Permit Request before work is performed. If you need to penetrate further than 1.5 inches into Concrete Masonry Unit (CMU) walls, through the thickness of gypsum-board sheet (self-drilling wall anchors do not require a permit), or over 2 inches into the top side of a concrete floor/slab (less than 2 inches requires that you use a drill stop); complete a Floor, Wall and Ceiling Penetration permit Request. Permits are always required for any penetrations into the bottom side of any concrete floor.
Active Fall Protection Systems
A work control document is required to govern the use of active fall protection systems (fall arrest or fall restraint). Unless work is performed in accordance with an Operational Safety Procedure (OSP) or Temporary Operational Safety Procedure (TOSP), a Fall Protection Permit must be completed and approved to satisfy the work control document requirement. Refer to ES&H Manual Chapter 6131 Appendix T4 - Fall Protection Permit Instructions.

Responsibilities are outlined within the associated documents.
Document Control:
    APPROVAL DATE:   11/11/2020
    REVIEW DATE:  11/11/2023
    Revision 0.5 - 11/11/2020: Added Active Fall Protection Systems, updated header and footer, Approved by Dir. of ES&H
    Revision 0.4 - 10/26/17: updated Referenced Documents to provide clarity regarding Dig and Blind Penetration permits
    Revision 0.3 - 10/22/15: Periodic Review; added Temporary Permitted Activities note under 4.0 Referenced Documents
    Revision 0.2 - 10/12/12: Periodic Review. Minor clarification edits only.
    Revision 0.1 - 03/23/12: Update to Web Chapter format.
    Revision 0.0 - 10/05/09: Update to reflect current laboratory operations.

This document is controlled as an on-line file. It may be printed but the print copy is not a controlled document. It is the user's responsibility to ensure that the document is the same revision as the current on line file. .