United States
Environmental Protection
Agency
Air and Energy Engineering
Research Laboratory
Research Triangle Park NC 27711
Research and Development
EPA/600/SR-93/052  May 1993
 Project Summary

 Proceedings of the Indoor  Radon
 Modeling Workshop,  Florida
 Radon  Research  Program
  David E. Hintenlang


  The report documents the Florida Ra-
don Research Program's (FRRP's) In-
door Radon Modeling Workshop, held
April  16-17, 1991,  in Tampa. Florida.
The workshop brought together experts
in various aspects of modeling the be-
havior and origin of indoor radon, with
the objective of evaluating models for
potential integration and application to
Florida buildings and  the FRRP. The
workshop provided guidance for the
use of theoretical modeling as an aid
to developing codes for radon  resis-
tant buildings. Presentations addressed
general modeling methods and strate-
gies, radon and soil gas entry models,
radon mitigation  methods modeling,
indoor air transport modeling, and in-
tegration  of diagnostic and empirical
measurements to support modeling.
   This Project Summary was devel-
oped  by  EPA's Air and Energy Engi-
neering Research Laboratory, Research
Triangle Park, NC, to announce key find-
ings of the research project that is fully
documented in a separate report of the
same  title (see Project Report ordering
information at back).

Introduction
  The Florida Radon Research Program
(FRRP) conducted the Indoor Radon Mod-
eling Workshop, on April  16-17, 1991, in
Tampa Florida. The workshop brought to-
gether experts in various aspects of mod-
eling the  behavior  and  origin of indoor
radon, with the objective of evaluating spe-
cific models for potential  integration, and
application to Florida buildings and the
FRRP. The workshop provided guidance
for the utilization of  theoretical modeling
as an  aid to the development of radon
resistant building codes. This includes both
direct  applications to building design as
well as applications  that  provide indirect
guidance through research efforts.
  To achieve these objectives a number
of eminent researchers who have worked
with  well developed theoretical models
made presentations elucidating the  par-
ticular details of their models and relevant
applications. The proceedings include a
narrative summary and the visual presen-
tation materials for each presentation.  Pre-
sentations addressed:

  General Modeling Methods and Strate-
   gies
  Radon and Soil Gas Entry Models
  Radon Mitigation Methods Modeling
  Indoor Air Transport Modeling
  Integration of Diagnostic and  Empirical
   Measurements to Support Modeling

  At  the conclusion of the presentations,
the  participants divided into two  task
groups to address questions and develop
recommendations and guidelines.
  Task Group 1  addressed FRRP  Re-
search House and New House Evaluation
Project (NHEP) issues, while Task Group
2 addressed model extension and  inte-
gration. The proceedings summarize the
discussion and conclusion of each  task
group.
  Task Group 1 concluded that  modeling
efforts should be expected to be able to
be integrated with the research house and
NHEP studies to provide useful tools  that
will avoid the need for massive  empirical
testing. A strategy for applying  both de-
tailed  models and more general  macro
models to the Research House and NHEP
programs was developed.
  Task Group 2 concluded that models
addressing each problem area discussed
in the workshop are well developed, but
not complete. Integration of some of these
models is feasible and would be valuable
to enhance  the understanding of the  fun-
damental physical principles governing in-
door radon entry and transport processes.
                                                 Printed on Recycled Paper

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  D.E. Hintenlangis with The University of Florida, Department of Nuclear Engineer-
    ing Sciences, Gainesville, FL 32611.
  David C. Sanchez is the EPA Project Officer (see below)
  The complete report, entitled "Proceedings of the Indoor Radon Modeling Work-
    shop,  Florida  Radon  Research Program," (Order No. PB93-172922;  Cost:
    $27.00), will be available only from:
          National Technical Information Service
          5285 Port Royal Road
          Springfield, VA 22161
          Telephone: 703-487-4650
  The EPA Project Officer can be contacted at:
          Air and Energy Engineering Research Laboratory
          U.S. Environmental Protection Agency
          Research Triangle Park, NC 27711
United States
Environmental Protection Agency
Center for Environmental Research Information
Cincinnati, OH 45268

Official Business
Penalty for Private Use
$300
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POSTAGE & FEES PAID
         EPA
   PERMIT No. G-35
EPA/600/SR-93/052

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