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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EPA
PERMIT No. G-35
EPA/600/SR-93/052
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