We have a policy that no one can ride in an elevator with a Dewar of LN.
From: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU> on behalf of "Bell,Martin" <mwb32**At_Symbol_Here**DREXEL.EDU>
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Date: Friday, May 11, 2018 at 8:05 AM
To: "DCHAS-L**At_Symbol_Here**PRINCETON.EDU" <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Subject: Re: [DCHAS-L] Elevator Entrapment while Transporting a Liquid Nitrogen Dewar
Good morning,
We recently had an incident where a researcher was momentarily trapped in an elevator while transporting a 230 liter
Dewar of liquid nitrogen. Thankfully the researcher walked out of the elevator a few seconds later.
This incident raised a concern about the potential for asphyxiation if an entrapment occurred and the Dewar released
nitrogen gas into the elevator cab (unlikely but need to prepare). We have elevator rescue protocols in place but the response time depends on the time of day.
Has anyone addressed this type of concern?
Martin W. Bell, M.S. CIH CSP
Director, Environmental Compliance
Department of Environmental Health and Safety
Drexel University
400 North 31st Street
Philadelphia, PA 19104
Tel: 215.895.5892 | Fax: 215.895.5926
Mobile: 215-778-4278
drexel.edu/facilities/healthsafety
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