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6410
Appendix T3 Laser
Personal Protective Equipment (PPE) |
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Jefferson
Lab recognizes that lasers expose workers to certain recognized hazard issues,
some of which can be mitigated through the use of appropriate personal protective
equipment (PPE). This appendix
provides information on how to:
·
Determine the appropriate PPE, and
· Obtain it.
Each authorized laser system/installation poses its own unique hazard(s). Required PPE, over and above that listed within this document, is defined within a system or area’s Laser Operational Safety Procedure (LOSP) and/or during the experiment review process.
PPE
does not take the place of engineered and administrative control measures;
rather it is used in conjunction with them to increase safety at Jefferson Lab.
This appendix applies to
Jefferson Lab’s minimum laser PPE requirements.
See ES&H Manual
Chapter 6620 Personal Protective Equipment Program
for guidance regarding the use of additional “basic PPE” for non-laser work.
Certain
lasers generate airborne contaminates that may not be adequately removed by
engineered controls (i.e. local exhaust ventilation). Contact Industrial Hygiene to perform a task
hazard analysis to determine appropriate controls.
The process steps for this procedure are performed in coordination with ES&H Manual Chapter 6410 Laser Safety Program.
NOTE: Management authority may be delegated at the discretion of the responsible manager.
Responsibilities for each process step are outlined within the procedure.
Laser protective eyewear (including glasses or goggles) is worn
when engineering and administrative controls
do not eliminate ocular exposure to below the maximum permissible
exposure (MPE) level and during alignment procedures.
Step
1:
Determine the following:
· Wavelength(s)
of laser output.
·
Potential for multi-wavelength operation.
·
Radiant exposure or irradiance levels for which protection
(worst case) is required.
·
Exposure time criteria.
·
MPE level
·
Optical density requirement of eyewear filter at laser output
wavelength.
·
Need for prescription glasses.
Step
2:
Selection
Provide information in
Step 1 to the Laser
System Supervisor (LSS).
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For beam alignment operations contact the Laser Safety Officer for “reduced optical density” eyewear. This eyewear is allowed during alignment operations and is stored in a different location from the “maximum optical density” eyewear appropriate for the area. |
Step 3:
Purchase
The LSS will requisition and/or provide required
laser protective eyewear. (See ES&H
Manual Chapter 6410 Appendix T2 Laser Requisitioning and Purchasing.)
Noise
levels from certain lasers and associated systems may be hazardous.
Step
1:
Noise
Hazard Analysis
· Contact Industrial
Hygiene and request a noise hazard analysis.
· If levels are found to be acceptable – the evaluator will inform the concerned party(s) of the determination.
Step
2:
Determination
If
the area is deemed to be a high noise area, the evaluator will coordinate with
the LSS for:
·
Medical monitoring for workers in accordance with ES&H Manual 6800
Appendix T1 Medical Monitoring,
·
PPE allocation,
·
Training as necessary, and
· Posting of warning signs.
Certain laser light can result in burns to
the skin. Long sleeved shirts and pants,
made of natural fibers are recommended when working with these types of lasers.
Remove
reflective jewelry, (e.g.: watches, rings, dangling badges, and necklaces) to
reduce accidental reflections.
5.0
Revision Summary
Revision 1 – 12/06/10 – 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 |
12/06/10 |
12/06/15 |
1 |
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