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DCHAS-L Discussion List Archive

From: "Ferm, Barret" <fermbarreta**At_Symbol_Here**SAU.EDU>
Subject: Re: [DCHAS-L] Liquid nitrogen storage
Date: March 8, 2013 11:06:54 AM EST
Reply-To: DCHAS-L <DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU>
Message-ID: <5564F9EDC11C09468EE5DAF02B5CB30F29529073**At_Symbol_Here**BY2PRD0410MB376.namprd04.prod.outlook.com>


IMHO, 1 room change/hour seems low even for a normal occupied room, and woefully inadequate for storing LN2. If air handlers failed, an asphyxiation hazard would result. Putting a full mesh door to the space would be helpful.

Barry
NRCC-CHO
St. Ambrose University

"Don't let people pull you into their storm. Pull them into your peace." -Kimberly Jones



On Fri, Mar 8, 2013 at 9:40 AM, Ralph B Stuart <rstuart**At_Symbol_Here**cornell.edu> wrote:
Does anyone have a rule of thumb for a ventilation rate in a room which is being used to store liquid nitrogen containers? Several credible web sources recommend a "well-ventilated area" without mentioning numbers. We have a room under consideration for this purpose with about 1 air change per hour. This seems low to me, but I thought I would sanity check it with DCHAS-L.

Thanks for any help with this.

- Ralph


Ralph Stuart CIH
Chemical Hygiene Officer
Department of Environmental Health and Safety
Cornell University

rstuart**At_Symbol_Here**cornell.edu

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