LArTF access procedures for shifts

This page outlines the procedures for gaining access to the platform at LArTF. It assumes that cryogenics operations have stabilized to the point where access to the platform by support groups such as the cryogenics team is only intermittent.

The procedure for access the platform is as follows:
  • A person firsts requests access to the platform from the Run Coordinator.
  • The Run Coordinator decides whether the access is approved.
  • The Run Coordinator then determines whether the person requesting access has the appropriate training or an escort with the appropriate training (this may be automated in the future).
  • The Run Coordinator then communicates to the person requesting access and the shifters
    • What work is approved,
    • Who is approved to do it,
    • When the work can be performed, and
    • Any other relevant details (prerequisites for the work to begin, etc.).
  • Prior to accessing the platform, the person requesting access must
    • Fill out an Expert Work Form in the E-log.
    • Remove a key from the keytree and leave an ID in its place.
    • Notify (call) the control room just before accessing the ODH-1 area of LArTF.
    • Take a hard hat and oxygen monitor with them down to the platform.
    • Wait 60 seconds before descending below the top of the stairwell.
      • In the case that an alarm sounds after the 60 seconds is up, call the control room. If work is necessary to be completed, take an oxygen rescue pack before going down to the platform.
  • The shifters then fill out a Begin of Detector Access form and post it in the Elog.
  • After completing their work and leaving the platform, the person who requested access must
    • Notify (call) the control room just after leaving the ODH-1 area of LArTF and
    • Complete an Elog entry describing the details of the work performed.
  • The shifters then fill out an End of Detector Access form and post it in the Elog.
Any person requesting access to the platform must:
  • Have completed LArTF Hazard Awareness Training,
  • Have completed ODH Training and have received an “ODH qualified” assessment from the FNAL ES&H Medical Department, and
  • Have received training on where to locate oxygen monitors and escape packs at LArTF and how to access and use the ODH key tree at LArTF.

Exceptions to these rules are specified in the LArTF Hazard Awareness Training and ODH Training materials and can be granted at the discretion of the Run Coordinator. For example, LArTF Hazard Awareness training is required for personnel who “enter LArTF or work at LArTF routinely”. Exception can be made, however, for tours or for special guests. Similarly, FESHM 4240 states the conditions under which a person without ODH training or ODH medical clearance can access an ODH-1 area:
“One-to-one escort by ODH-qualified personnel - An escort can be provided in special cases when the persons entering an area do not meet requirements 3 and 4. Individuals shall be under the direct continuous supervision of individuals who meet (3), (4), and (5) above. Note that escorted persons shall not have been designated as ODH-excluded by the Medical Department. If not evaluated by the Medical Department, the escort assumes responsibility for judging whether or not they believe the fitness of the escorted individual would significantly impede escape from the ODH operation in the event of an alarm.”

In all cases, a two-person rule must be followed for any work performed at LArTF, including in the DAQ room. The two-person rule can be satisfied with one person working on the platform and another at grade level so long as the two people are in constant visual or audio communication with one another. If pit access is required, at least two people must travel to the pit together (i.e. one person can not remain on the platform).

Note that information about the new oxygen monitors at LArTF can be found here: