United States
Environmental Protection
Agency
Air and Energy Engineering
Research Laboratory
Research Triangle Park NC 27711
Research and Development
EPA/600/S7-89/013 Jan. 1990
Project Summary
The 1985 NAPAP Emissions
Inventory (Version 2):
Development of the National
Utility Reference File
J. K. Wagner, S. S. Rothschild, and D. A. Istvan
The National Acid Precipitation
Assessment Program's (NAPAP's)
emissions inventory activities focus
on the estimation of emissions from
pollutants that contribute to acid
deposition. Because electric utilities,
which emit a large share of total acid
deposition precursor emissions, are
important for modeling analyses, this
project was conducted to create a
file containing comprehensive data
on all electric utilities in the U.S. Data
reported by states to the National
Emissions Data System for the 1985
NAPAP Emissions Inventory and data
reported to the U.S. Department of
Energy on EIA Form 759, EIA Form
767, FERC Form 423, and the Inte-
grated Data Base System matched
and combined. The resulting 1985 Na-
tional Utility Reference File contains
detailed unit level data for nearly
10,000 electricity generating units.
This Project Summary was
developed by EPA's Air and Energy
Engineering Research Laboratory,
Research Triangle Park, NC, to
announce key findings 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 National Acid Precipitation
Assessment program (NAPAP) was
established by Congress in 1980 to
coordinate and expand research on
problems posed by acid deposition in
and around the U.S. Because electric
utilities emit significant amounts of acid
deposition precursor pollutants (SOz and
NOX), one of NAPAP's responsibilities is
to provide a comprehensive data base of
electric utility emissions and operating
data for use by other NAPAP research
efforts and by federal and state
government agencies.
No single data base currently
maintained by either the Environmental
Protection Agency (EPA) or the
Department of Energy (DOE) contains
accurate and comprehensive information
about electric utilities at the generating
unit level in a form that meets the needs
of NAPAP's electric utility modeling
researchers and other utility data users.
Several data bases contain different and
sometimes overlapping unit-level data
elements, while other sources contain
reliable plant-level information. Some
publications address a single data issue.
The purpose of this project was to
develop a single data base for a
consistent reference year (1985) that
would meet most of the broad utility-
related data needs of NAPAP research
groups. Special emphasis was placed on
meeting data needs related to
atmospheric modeling, emissions
forecasting, and assessment. The
resulting data base is termed the National
Utility Reference File (NURF). It includes
information on every electric generating
unit—including fossil-fuel-fired, hydro,
and nuclear units—in the U.S. in 1985.
The major sources of data for NURF
included the 1985 NAPAP Annual
Emissions Inventory (Version 2), DOE's
Integrated Data Base System (IDBS, and
inventory of power plants), Energy
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Information Administration (EIA) Forms
767 and 759, Federal Energy Regulatory
Commission (FERC) Form 423, and
miscellaneous other sources of data.
Table 1 lists these major sources of data
from which NURF was compiled and the
data they provided.
Most of the effort in creating NURF
was directed toward merging the differing
data bases and reconciling differences
between them. These differences
occurred most often between IDBS, the
NAPAP Emissions Inventory, and EIA
Form 767, since the inventory contains
data at the emission point level and Form
767 contains data at the boiler level,
while NURF is at the generating unit level
defined by IDBS.
Data Categories
The general categories of data
included in NURF are:
• identification and location information;
• unit operation characteristics;
• unit lifetime data;
• fuel data, including three fuels and two
types of coal;
• regulatory information;
• emissions and pollution control data;
and
• ownership data.
The individual data elements included in
each of these categories are discussed
below.
Identification and Location
Information
DOE plant and unit identifier codes
(Office of the Regulatory Information
System (ORIS) Respondent and Plant
codes), National Emissions Data System
(NEDS) plant and point codes, state and
county codes, and the plant name are
provided.
Unit Operation Characteristics
Prime mover (steam, hydro, nuclear),
technology code, nameplate capacity in
MW, capacity factor, generation, heat
rate, bottom type (wet or dry), and firing
type (e.g., tangential, opposed) are listed
for each unit.
Unit Lifetime Data
Year on-line and year of retirement (if
announced by DOE) are provided. Where
a unit is undergoing fuel conversion, the
retirement date is the date it is shut down
for conversion, and a new year on-line is
supplied for the converted unit.
Fuel Data
The type of fuel and its heating value,
sulfur content, ash content, delivered
price, and quantity consumed are
reported for three fuels. If one of the fuels
is coal, further detail is provided for two
coal types (e.g., bituminous, sub-
bituminous).
Regulatory Information
The regulatory category and emission
limit as reported on EIA Form 767 are
provided for S02, NOX, and TSP.
Emissions and Pollution Control
Data
Emissions in tons/year in 1985 are
provided for S02, NOX, TSP, and VOC.
The S02, NOX, and VOC emission rates
are also provided. The S02 and N0>
control devices and their efficiencies, and
any information available on planned
scrubbers are also provided in NURF.
Ownership Data
The operating utility name and owner
are listed. If a utility is owned by more
than three parties, information is provided
on three owners (owner state, ownei
utility, and percent of ownership). If a
utility has more than three owners, the
sum of the percentages may be less than
100%.
The report contains tables summarizing
fuel consumption, generation, capacity
and S02 and NOX emissions by state
Plant-level S02 and NOX emissions foi
the top 100 emitters of S02 in the U.S. ir
Table 1. Major Data Inputs to NURF
Name Type*
Level of Detail
Data Provided
IDBS
EIA Form 759
FPC Form 423
NAPAP
EIA Form 767
DOE coal conversions
NERC coal conversions
NERC planned plants
OAQPS regulatory data
FGDIS
Radian/EVA data
EPRI TAG data
A Generating unit
A Plant
A Plant
A Point
A Boiler/fuel feeder
M Unit
M Unit
M Unit
M Unit
A Boiler
M Boiler
M Prime mover - fuel type
Year on-line, year retired, capacity, ownership, prime mover, fuel
capability
Fuel consumption and generation
Cost and quality of fuels
Fuel consumption, fuel quality, control equipment, and emissions
(SO2, NO,,, TSP, emission limits)
Fuel consumption, control equipment firing type and bottom type,
SO2, NOX, and TSP emission limits
Plants converted or planning conversion to coal, year unit planned to
convert
Plants converted or planning conversion to coal, year unit planned to
convert
New plants, year on-line date
Regulatory categories
SO2 scrubber data
Retrofit factor
Technology-related data
'A = Automated, M = Manual
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1985 and unit-level information (S02 Complete information is provided on with selected data elements for steam
emission rate, Btus consumed, and S02 tape for nearly 10,000 electric utility electric units greater than 25 MW are
emissions) for generating units with units. An EBCDIC data tape containing available from the National Technical
capacities of at least 25 MW are the entire data base and a diskette Information Service.
provided. containing a Lotus 123 worksheet
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J. K. Wagner, S. S. Rothschild, and D. A. Istvan are with E. H. Pechan and
Associates, Inc., Springfield, VA 22151.
J. David Mobley is the EPA Project Officer (see below).
The complete report consists of paper copy, diskette, and magnetic tape, entitled
"The 1985 NAPAP Emissions Inventory (Version 2): Development of the National
Utility Reference File:"
Paper Copy (Order No. PB 90-132 341/AS; Cost: $23.00, subject to change)
Diskette (Order No. PB 90-501 008/AS, Cost $80.00 subject to change)
Magnetic Tape (Order No. PB 90-500 992/AS, Cost: $220.00 subject to
change)
(Cost of diskette and magnetic tape includes paper copy.)
The above items 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
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Penalty for Private Use $300
EPA/600/S7-89/013
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