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6550
Appendix T3 Emergency
Response to an Uncontrolled
Cryogen Release |
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This appendix describes how to recognize an uncontrolled cryogen release and the appropriate response procedure steps to follow.
The process steps for this procedure are performed in coordination with ES&H Manual Chapter 6550 Cryogenic Safety Program.
NOTE: Emergencies related to oxygen deficiency hazards are discussed in ES&H Manual Chapter 6540 Appendix T1 ODH Emergency Procedures. Emergency responses for situations are discussed in ES&H Manual Chapter 3510 Emergency Management Plan. |
NOTE: Management authority may be delegated to a task qualified Jefferson Lab employee at the discretion of the responsible manager.
3.1
Anyone
at Jefferson Lab (not trained in cryogenic emergency response)
· Respond to an uncontrolled cryogen release per this appendix.
3.2
Supervisor/Subcontracting
Officer’s Technical Representative (SOTR)/Sponsor
· Report an event or near-miss to the ES&H Reporting Officer in accordance with ES&H Manual Chapter 5200 Event Investigation and Causal Analysis Process.
Unless otherwise stated, anyone at Jefferson Lab may perform the process steps outlined below.
4.1 Uncontrolled Cryogen Release
Warning signs of an uncontrolled cryogen release include:
· Severe Temperature Drop in Area – A cryogen release can drop temperatures to -244° F (120 K) within a 10-foot radius in a few seconds.
· Vapor Plume – An uncontrolled release causes a visible water-vapor plume until the gas warms.
· Rushing Gas Sound – A high-pressure cryogen release can produce a hissing or whooshing sound associated with rushing gas.
Step
1:
Don and Activate an Emergency
Escape Pack (EEP) if available.
Step
2:
Evacuate the area. (If an outdoor release, evacuate 100 meters upwind of a plume.
If an indoor release, evacuate out of the building and remain upwind.)
·
Stay
away from vapor plumes.
o If you see a vapor plume, use an
alternate route.
o If you find yourself in a vapor
plume and do not have an EEP, hold your breath until you are out of the plume.
·
If a worker is injured or unconscious, do
not attempt to rescue them. Only offsite emergency responders are trained, qualified
and authorized to perform rescue operations.
Step 3:
Muster Point
·
Call 911 and Occupational Medicine (x7539) immediately if:
o
Workers
are missing or injured
o
You
are unsure of a person’s location or condition
Step 4:
Notifications (made from a safe location)
·
Security (x5822)
·
Occupational Medicine (x7539)
·
Crew
Chief (x7045)
· Supervisor, SOTR, or Sponsor
Figure
1: Flowchart for Emergency Response to Uncontrolled Cryogen Release
5.0
Revision Summary
Periodic Review – 06/28/19 – No changes per TPOC
Revision 1.3 – 06/30/16 – Clarified
Emergency Response Expectations
Revision 1.2 – 03/19/15 – Updated Technical POC from Dana Arenius to Jonathan Creel
Revision 1.1 – 10/30/14 – Clarified evacuation instructions for uncontrolled cryogen release
Revision 1.0 – 01/17/12 – Updated
to reflect current laboratory operations
ISSUING
AUTHORITY |
TECHNICAL
POINT-OF-CONTACT |
APPROVAL
DATE |
REVIEW DATE |
REV. |
ES&H Division |
06/28/19 |
06/28/22 |
1.3 |