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6110
Appendix T3 Group
Lock, Tag, Try (LTT) Procedure |
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This procedure provides members of a group a way to secure
hazardous energy sources with protection equivalent to that provided by the
individual procedure outlined in ES&H Manual Chapter
6110 Appendix T1 Lock, Tag, Try (LTT) Procedure.
NOTE: Management authority may be delegated at the discretion of the responsible manager.
· Recognize and respect LTT measures.
· Do not remove any lock or tag except those meeting the criteria outlined within ES&H Manual Chapter 6110 Appendix T2 Special Lock and Tag Removal Procedure.
· Maintain appropriate LTT training (SAF 104 Lock, Tag, Try).
· Obtain specific LTT training on
equipment being serviced.
· Perform LTT process steps (in accordance with ES&H Manual Chapter
6110 Lock, Tag, Try (LTT) Procedure) only after
authorization from the supervisor of the equipment which requires the securing
of the hazardous energy source.
· Only assign Qualified Taggers, and provide equipment-specific LTT training, for equipment under your authority.
·
Maintain familiarity with
Jefferson Lab's LTT programs and procedures. (If you supervise employee(s) who use LTT procedures.)
·
Perform inspections
for compliance with lock and tag procedures as part
of regular supervisory oversight.
2.4 Subcontracting Officer’s Technical Representative (SOTR)
· Be a Qualified Tagger. (If you
supervise subcontractors who perform LTT on site.)
· Provide equipment-specific LTT procedures to subcontractors on an as needed basis.
· Verify that long-term service subcontractors are trained as
Jefferson Lab qualified taggers and that
their training is current.
·
Implement
group LTT and act as Group LTT
Coordinator in accordance with this procedure (if Jefferson Lab
employee(s)
and subcontractor(s) are concurrently working on the same equipment/system).
· Review and approve subcontractors’ Lockout/Tagout program. Ensure that:
o Construction – subcontractors’ program meets or exceeds the requirements of OSHA 29 CFR 1926 Construction Industry Regulations, when doing construction type work activities.
o Maintenance subcontractors’ program meets or exceeds the requirements of OSHA 29 CFR 1910 General Industry Regulations, when doing service or maintenance on machines or equipment.
·
Be a Qualified Tagger.
· Account for all persons assigned to the work.
· Ensure all energy sources are under LTT.
·
Ensure all process steps of
the Group LTT procedure, outlined below, are properly carried out.
Unless otherwise stated the Group
LTT Coordinator performs the process steps listed below.
Step 1:
Prepare a Written Work Control Document:
Group LTT
applications require a written Work Control Document (see ES&H Manual Chapter 3310
Operational Safety Procedure Program), unless all
of the following elements exist:
· The equipment
has no potential for residual, stored, or the re-accumulation of stored, energy
after shutdown.
· The equipment
has a single energy source which can be readily identified and isolated.
· The isolation
and locking out of the energy source completely de-energizes and de-activates
the equipment.
· The equipment
is isolated from its energy source and locked out during servicing and
maintenance.
· A single lock
out device will achieve a locked out condition.
· The lock out device is under exclusive
control of the authorized employee performing the servicing or maintenance.
· The servicing
or maintenance procedure does not create hazards for other employees.
· There is no
record of incidents involving the unexpected activation or re-energization of
the equipment during servicing or maintenance within Jefferson Lab.
Step 2: Coordinate Work/Notify Others:
· Ensure all potential sources of hazardous energy, including
stored/residual energy, are known, documented, and understood.
·
Coordinate the LTT
with other system owners who may be affected by the work.
·
Review the job,
equipment, and planned processes with all affected groups.
·
Prepare a Group LTT
Form for Multiple or Single Equipment.
·
Post the completed Group
LTT Form for Multiple or Single Equipment at the area of the group lockout
device for the duration of the work.
Step
3:
Isolate Energy Sources:
· Identify and locate all energy sources associated with the job.
·
Follow a safe shutdown sequence of the
equipment.
·
Isolate all energy sources.
· Apply
the lockout
mechanisms to the identified energy-isolating devices.
· Perform the required tests to verify that all hazardous energy sources have been de-energized.
·
Identify, locate, and
prepare relief devices to ensure residual, stored or accumulated energy creates
no hazard.
·
Perform the required
tests to verify that stored/residual energy has been drained from the system
and will not re-accumulate.
·
Record all
energy-isolating and energy-draining devices on the Group LTT Form for Multiple
or Single Equipment.
Step 4: Test LTT Device Applications:
·
Advised all responsible Qualified
Taggers that they have a right to personally verify that the hazardous energy
sources have been effectively de-energized.
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NOTE: The responsible Qualified Tagger who opts
to verify the effectiveness of the isolation measures must do so before commencement
of work. Activities include: · Affixing
their personal lockout device to the lock box; and ·
Performing the verification in the presence of the
Group LTT Coordinator. |
·
Designate a specific location
for a lockout box. Ensure all
responsible Qualified Taggers know, and have access to, the location. .
·
Place all keys to the locks,
used to isolate the energy sources, in the lockout box.
·
Lock the lockout box
with the Group LTT Coordinator(s)’ lock and tag.
·
Place a copy of the Group LTT Form
near the lockout box so it is readily accessible to all responsible Qualified Taggers.
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NOTE:
A lockout box is one example of a mechanism that can be used during a group
lockout situation; other comparable group lockout device mechanisms may also
be utilized. |
Step 6:
Prior to
Commencement of Work:
The bulleted activities
below are to be performed by responsible Qualified Taggers
· Review the Group LTT Form and any associated Work Control
Documents.
·
Apply individual locks
to the lockout box prior to work.
·
Visually verify the
isolation of hazardous energy sources at each location listed on the Group LTT
Form for Multiple or Single Equipment to ensure that the integrity of a proper LTT
has been achieved (i.e., it must be verified that each lock and tag is
physically in place as noted on the Group LTT Form for Multiple or Single
Equipment. This action can be accomplished by the Group’s LTT Coordinator(s) on
behalf of the Qualified Taggers working on the group lockout).
The group lockout box remains locked at all times
until the Group LTT Coordinator(s) determines it is safe to remove the keys (i.e.
the Group LTT Coordinator(s)’ lock stays on the box until it is deemed
appropriate for removal).
·
Communicate the job-status
to affected personnel at the beginning of each shift.
·
Ensure all responsible
Qualified Taggers, or the Group’s
LTT Coordinator(s) visually verifies the isolation of hazardous energy sources
at each location listed on the Group LTT Form for Multiple or Single Equipment
at each shift change. This is to ensure
that the integrity of the LTT has been maintained (i.e., it must be verified that each lock and
tag is physically in place as noted on the Group LTT Form for Multiple or
Single Equipment).
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NOTE: It is the responsible Qualified Tagger’s lock (the one attached to the lockout box) that gets switched at a shift, or personnel change, not the locks on the equipment. |
· Review the completed job against the job description to ensure
that it is complete and that no one will be endangered by the removal of the
lock devices.
· Notify the system owners that the work is complete and the equipment is ready for re-energizing.
·
Remove the keys from the lockout
box and the LTT devices from the equipment.
· Test equipment to verify proper operation.
·
Complete and file the
Group LTT Form for Multiple or Single Equipment in accordance with department
procedures.
4.0
Revision Summary
Revision 1.1 – 12/01/14 - Clarification of process steps and updates made to format. Qualifying periodic review, no substantive changes required.
Revision 1 – 04/04/09 – Updated to reflect current laboratory operations.
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ISSUING
AUTHORITY |
TECHNICAL POINT-OF-CONTACT |
APPROVAL
DATE |
EXPIRATION
DATE |
REV. |
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ESH&Q Division |
04/04/09 |
12/01/14 |
1.1 |
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