Browse Acronyms

Browse the acronym list:

U Listing

U
– unable to rate with sources used (insufficient data available to determine hazard rating (MSDS)
– Unclassified (classification)
– uranium (element, Z = 92)

U-AVLIS
Uranium Atomic Vapor Laser Isotope Separation

u-f
urea-formaldehyde (insulation)

U.K.
United Kingdom (preferred over "UK"; use as adjective only; spell out as noun)

U.S.
United States (of America) (use as adjective only; spell out as noun)

U.S.C.
United States Code

U.S.S.R.
Union of Soviet Socialist Republics (preferred over "USSR"; use as adjective only; spell out as noun)

U/A
understanding and acceptance

U₃O₈
urynal uranate (yellowcake)

U₃Si₂
uranium silicate composite

UAC
User Advisory Committee (OLC)

UAPA
Uniform Administrative Procedures Act

UART
universal asynchronous receiver-transmitter

UAS
Uniform Accounting System

UBC
uniform building code

UBN
unclassified broadband network

UC
Unclassified Category

UCA
utility communications architecture

UCAMS
Universal Computer Access Management System

UCG
underground coal gasification

UCHA
uncontrolled core heatup accident

UCI
– Unclassified Controlled Information
– University of California at Irvine

UCL
upper control limit

UCl
uranium chloride

UCl₄
uranium etrachloride

UCl₅
uranium pentachloride

UCl₆
uranium hexachloride

UCN
– ultracold neutron
– Universal Control Number

UCNI
Unclassified Controlled Nuclear Information

UCRG
Uniform Contractor Reporting Guidelines

UCRL
– University of California Radiation Laboratory
– University of California Research Laboratory

UCSI
Unclassified Controlled and Sensitive Information

UCV
Unmanned Cargo Vehicle

UDAG
Urban Development Action Grant

UDH
Utah Department of Health

UDIN
Unite de Dismantlement des Installations Nucleaires (France)

UDS
Uranium Demonstration System

UE
– uranium enrichment
– Uranium Enrichment Organization

UEA
– Uranium Enrichment Administration
– Uranium Enrichment Associates

UEA-AEP
Uranium Enrichment Associates, Alabama Enrichment Plant

UEBU
Uranium Enrichment Business Unit

UEC
Uranium Enrichment Corporation

UEFPC
Upper East Fork Poplar Creek

UEL
upper explosive limit

UEP
– unaccompanied enlisted personnel
– University and Educational Programs Office

UEPH
unaccompanied enlisted personnel housing

UEPIP
Uranium Enrichment Performance Improvement Program

UESA
uranium enrichment services activity

UF
University of Florida

UF₄
uranium tetrafluoride (green salt)

UF₆
uranium hexafluoride

UFAS
Uniform Federal Accessibility Standards

UFG
Uniform Filing Guide

UFMBC
unity-feedback model-based compensator

UGS
upper guide structure

UGV
Unmanned Ground Vehicle

uhf
ultrahigh frequency

UHI
upper head injection

UHSFC
ultrahigh-sensitivity fission counter

UHV
ultrahigh voltage

UHVAC
ultrahigh-voltage alternating current

UI
united inch

UIC
– Underground Injection Control (program) (TDHE regulations)
– Unit Identification Code
– user identification code

UID
user identification

UIL
user interface language

UK
United Kingdom ("U.K." is preferred; use as adjective only; spell out as noun)

UKAEA
United Kingdom Atomic Energy Authority

UL
Underwriters Laboratories Inc.

ULCP
University/Laboratory Cooperative Program

UMB
upper memory block

UMC
unneeded materials and chemicals

UMD
Unit Movement Data

UMDA
Umatilla Depot Activity

UMRUG
Utility/Manufacturer Robot User Group

UMS
Utilities Management System

UMT
uranium mill tailings

UMTRA
Uranium Mill Tailings Remedial Action

UMTRAP
Uranium Mill Tailings Remedial Action Program/Project

UMTRCA
Uranium Mill Tailings Radiation Control Act of 1978

UN
United Nations

UNAM
Universidad Nacional Antónoma de México (National Autonomous University of Mexico)

UNC
– unified coarse thread (bolts, screws)
– United Nuclear Corporation

UNDP
United Nations Development Program (Programme)

UNEP
United Nations Environmental Program (Programme)

UNESCO
United Nations Educational, Scientific and Cultural Organization

UNH
uranyl nitrate hexahydrate solution

UNICOR
Federal Prison Industries

UNISOR
Oak Ridge University Isotope Separation

UNIVAC
Universal Automatic Computer

UNPS
underground nuclear power station

UNSCEAR
United Nations Scientific Committee on the Effects of Atomic Radiation

UNSR
unclassified national security related

UNT
Undergraduate Navigator Training (USAF)

UNTG
Utility Nuclear Transportation Group

UO
– unit operator
– Unusual Occurrence

UO₂
uranium dioxide (brown oxide)

UO₂(NO₃)₂
uranyl nitrate

UO₃
uranium trioxide (orange oxide)

UOP
unaccompanied officer personnel

UOPH
unaccompanied officer personnel housing

UOR
unusual occurrence report

UO_x
uranium oxide(s)

UP
uranium production

UPA
United Power Association

UPC
– upper process cell
– unit process controller

UPDF
Uranium Processing Demonstration Facility

UPE
User Portability Extension

UPGWA
United Plant Guard Workers of America

UPI
– United Press International
– upper plenum injection

UPR
University of Puerto Rico

UPS
– uninterruptible power supply
– United Parcel Service

UPTF
Upper Plenum Test Facility (Germany)

UPW
uniform present worth

UR
Unite Robotique (France)

URC
universal RADIAC chip

URD
– underground residential distribution
– Uniform Request for Disposal (WMO)

Urenco
European Gas Centrifuge Uranium Enrichment Consortium

URL
Uniform Resource Locator

URLB
Uranium Recovery Licensing Branch (DWM/DOE)

US-IGBP
U.S. Geosphere/Biosphere Program (see SCOPE)

USACE
U.S. Army Corps of Engineers

USAD
Utility Service Area Disaggregation (forecasting model)

USAEHSC
U.S. Army Engineering and Housing Support Center

USAF
U.S. Air Force

USAFESA
U.S. Army Facilities Engineering Support Agency

USAID
U.S. Agency for International Development

USAP
U.S. Antarctic Program

USAREUR
U.S. Army, Europe

USASDC
U.S. Army Strategic Defense Command

USATHAMA
U.S. Army Toxic and Hazardous Materials Agency

USAWC
U.S. Army War College

USBC
U.S. Bureau of the Census (DOC)

USBLM
U.S. Bureau of Land Management (DOI)

USBM
U.S. Bureau of Mines (DOI) (also BOM and BuMines)

USBMG
U.S. Bureau of Mines and Geology (DOI)

USBR
U.S. Bureau of Reclamation (DOI)

USC
– University of South Carolina
– University of Southern California
– University of Southern Carolina
– User Service Center
– User Services Consulting
– utility services contract

USCAR
U.S. Council for Automotive Research

USCEA
U.S. Council for Energy Awareness

USCG
U.S. Coast Guard

USD
Unified School District

USDA
U.S. Department of Agriculture

USDOE
U.S. Department of Energy (also DOE)

USDOI
U.S. Department of the Interior (also DOI)

USDW
– underground source of drinking water
– usable supply of drinking water

USEC
United States Enrichment Corporation

USEP
University and Science Education Programs

USEPA
U.S. Environmental Protection Agency ("EPA" is preferred)

USEUCOM
U.S. European Command

USFS
U.S. Forest Service (USDA)

USFWS
U.S. Fish and Wildlife Service

USGS
– U.S. Geological Service
– U.S. Geological Survey

USI
unresolved safety issue

USIS
U.S. Information Service

USLE
universal soil loss equation

USMC
U.S. Marine Corps

USN
U.S. Navy

USNRC
U.S. Nuclear Regulatory Commission (also NRC)

USPCI
U.S. Pollution Control, Inc.

USPS
U.S. Postal Service

USQ
unreviewed safety question

USQD
Unreviewed Safety Question Determination

USR
Utilities System Restoration

USRAD
Ultrasonic Ranging and Data (ORNL)

USRADS
Ultrasonic Ranging and Data System (ORNL)

USS
utility shift supervisor

USSC
United States Steel Corporation

USSR
Union of Soviet Socialist Republics ("U.S.S.R." is preferred; use as adjective only; spell out as noun)

UST
underground storage tank

USTRANSCOM
U.S. Transportation Command (DOD)

USTS
underground storage tank system

USU
utility system uprating

USW
unit of separative work ("SWU" is preferred)

UT
– The University of Tennessee
– umbilical tower (space program term)
– Utah (use only with ZIP code addresses)

UT-ORGSBMS
University of Tennessee Oak Ridge Graduate School of Biomedical Sciences

UT-TAE
The University of Tennessee Technological and Adult Education

Utah
(spell out unless used with ZIP code addresses; state name is not needed with Salt Lake City)

UTCS
Urban Traffic Control System

UTGS BS
The University of Tennessee Graduate School of Biomedical Sciences

UTK
The University of Tennessee at Knoxville

UTM
– Unified Transport Model
– Universal Transverse Mercator

UTOS
United Technologies Optical Systems

UTP
unshielded twisted pair (wire)

UTSG
U-tube steam generator

UTSI
The University of Tennessee Space Institute

UTTR
Utah Test and Training Range (USAF)

UU
ultimate user

uv
ultraviolet (preferred over "UV")

UV
ultraviolet ("uv" is preferred)

uv-B
ultraviolet-B

UVP
Ultraviolet Products, Inc.

UVT
Universal Venturi Tube

UVTA
undervoltage trip attachment

UW
– United Way
– University of Wisconsin

UWRL
Utah Water Research Laboratory (Utah State University, Logan)