RE: Short term vs Long term (Atmospheric release)

["David Whitfill/Kdhe" <DWhitfil@kdhe.state.ks.us>]

A reference found in most tool kits is the Workbook of Atmospheric
Dispersion Estimates by D. Bruce Turner. It is found in various
reincarnations-mine was published in 1967 by the U.S.Department of Health,
Education, and Welfare. Just a short snippet from page 41:

"Thus far we have considered only sources that were emitting continuously
or for time periods equal to or greater than the travel times from the
source to the point of interest. Cases of instantaneous release, as from an
explosion, or short term releases on the order of seconds, are often of
practical concern."






"Weiner, Ruth" <rfweine@sandia.gov>@romulus.ehs.uiuc.edu on 11/02/99
05:51:32 PM

Please respond to radsafe@romulus.ehs.uiuc.edu

Sent by:  radsafe@romulus.ehs.uiuc.edu


To:   Multiple recipients of list <radsafe@romulus.ehs.uiuc.edu>
cc:

Subject:  RE: Short term vs Long term (Atmospheric release)


A "long-term" release is modeled as a steady-state emission (as from a
stack).  A short-term release is modeled as a puff.  In the latter, the
total amount released is the sum of what is deposited and what remains in
the air. "Short term" usually means instantaneous -- everything that is
released is released in a few minutes.  "Long term" is an hour or longer.
Any air pollution textbook can provide details.

Ruth F. Weiner, Ph. D.
Sandia National Laboratories
MS 0718, POB 5800
Albuquerque, NM 87185-0718
505-844-4791; fax 505-844-0244
rfweine@sandia.gov


-----Original Message-----
From: Dan Hamilton [mailto:dshamilt@umich.edu]
Sent: Tuesday, November 02, 1999 3:21 PM
To: Multiple recipients of list
Subject: Short term vs Long term (Atmospheric release)


What is the difference between short term and long term release?  How are
they defined? and what published reference can you give that shows these
definitions?

Also, what ultimately dictates whether an atmospheric release is considered
 short term or long term?

D.S. Hamilton
dshamilt@umich.edu

************************************************************************
The RADSAFE Frequently Asked Questions list, archives and subscription
information can be accessed at http://www.ehs.uiuc.edu/~rad/radsafe.html

************************************************************************
The RADSAFE Frequently Asked Questions list, archives and subscription
information can be accessed at http://www.ehs.uiuc.edu/~rad/radsafe.html



************************************************************************
The RADSAFE Frequently Asked Questions list, archives and subscription
information can be accessed at http://www.ehs.uiuc.edu/~rad/radsafe.html