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From: Bell,Martin <mwb32**At_Symbol_Here**drexel.edu>
Subject: Re: [DCHAS-L] Elevator Entrapment while Transporting a Liquid Nitrogen Dewar
Date: May 11, 2018 12:53 UTC
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Message-ID: 4803F538-360C-461A-A9F4-B69237B08F02**At_Symbol_Here**drexel.edu
In-Reply-To:
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