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Re: Non-ionizing Radiation
Reply to: RE>Non-ionizing Radiation
There's alot of traffic about microwave ovens. CDRH advised back around 1985
that annual surveys aren't warranted.
People should be advised to check the mechanical condition of the oven; damaged
ovens could leak radiation. The cardiac pacemaker warning is also not
warranted (except maybe around more intensively used ovens). Many pacers are
tested for EMI vulnerability and EMI resistance is designed into them and has
been for decades.
We handle NIR sources from static through microwaves as part of our HAZCOM
program. NIR sources are supposed to be listed in inventories along with
chemical and biological hazards. This avoids creating a new program. Most
sources are covered by safety procedures which are agreed to by the users and
ES&H types.
Class 4 lasers require a safety procedure and many class 3 applications also
require a safety procedure.
We measure non-optical sources and uv sources. Laser and visible light safety
issues are typically resolved by calculations. The back of the Z136.1 standard
is loaded with sample calculations. Rockwell Laser Industries in Cincinnati
sells LAZAN which alows many laser safety calcs to be done on a PC.
Thre refernce standards are:
0 Hz - 3 kHz - TLVs; your IHs have them
3 kHz - 300 GHz - IEEE C95.1-1991
>300 GHz - LIA Z136.1-1993 for lasers and all non-laser sources >1400 nm and
the TLVs for non-coherent uv, visible, and IR-A sources.
I can send copies of our management publications to curious parties. Please
contact me at my e-mail address to request them.
--------------------------------------
Date: 1/9/96 7:08 PM
To: GORDON MILLER
From: radsafe@romulus.ehs.uiuc.edu
Just wondering what other Universities do to "regulate"
the use of non-ionizing radiation such as lasers and
microwaves at their facilities. Our Radiation Safety
Committee covers ionizing radiation but has traditionally
not dealt much with the non-ionizing side. They are
toying with the idea of setting up a separate committee
or a sub-committee to deal with such issues. Is this
necessary? What are your experiences with such things?
They are also curious whether or not other Universities
specifically grant "licenses" to users of non-ionizing
radiation (something we do for ionizing radiation users).
Any thoughts appreciated, not just from Universities.
Thanks in advance.
Margaret Ashton
University of Colorado
Health Physics Laboratory
ashtonm@spot.Colorado.EDU
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From: ASHTON MARGARET ELIZABETH <ashtonm@spot.Colorado.EDU>
To: Multiple recipients of list <radsafe@romulus.ehs.uiuc.edu>
Subject: Non-ionizing Radiation
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