Browse Acronyms
Browse the acronym list:
R Listing
R
– ratio
– roentgen [convert to Si: coulombs per kilogram (C/kg); sometimes "roentgen" is acceptable]
– thermal resistance (R-value)
R&D
research and development
R&DSPC
Research and Development Strategic Planning Committee
R&EA
Resource and Environmental Analysis (Energy Division, ORNL)
R&PS
Robotics and Process Systems
R&SSD
Radiation and Safety Surveys Department (ORNL)
R-12
refrigerant-12 (liquid dichlorodifluoromethane)
R-O-R
reduction-oxidation-reduction (process)
R.I.
Rhode Island (use after city names in references, lists, tables, footnotes, bibliographies, and indexes; spell out in text)
R/D
resolver-to-digital
R/RH
robotics and remote handling
r2
coefficient of determination
Ra
radium (element, Z = 88)
RA
– readiness assessment
– Rehabilitation Act of 1973
– relative accuracy (test)
– remedial action
– remote access
– Restricted Area
– risk assessment
RAA
responsibility, authority, and accountability
RAAS
Remedial Action Assessment System
RAB
– Reliability Assessment Board
– riverine aquatic bed
RAC
– Recombinant DNA Advisory Committee (NIH)
– response action contractor
– risk assement code
– Robotics and Automation Council
RACT
reasonably available control technology
RAD
radioactive
rad
– [not an abbreviation but a full word derived from radiation absorbed dose; plural is "rad" or "rads"; replaces roentgen; convert to SI: gray (Gy); sometimes "rad" is acceptable]
– radian [central angle of a circle determined by two radii and an arc joining them, all of the same length (math)]
rad-hard
radiation-hardened
Rad-NESHAP
National Emission Standards for Hazardous Air Pollutants for Radionuclides
RAD/SAB
radiological sabotage
radar
radio detecting and ranging
RADC
Rome Air Development Center (Griffiss Air Force Base, New York)
RADCON
Radiation Control (Manual)
RADIAC
radiation detection, indication, and computation
Radwaste
radioactive waste
RAEC
Roane-Anderson Economic Council
RAF
– radiation amplification factor
– Risk Assessment Forum (EPA)
RAG
Resource Analysis Group
RAILS
Records and Information Locator System
RAM
– radioactive material
– random access memory (computer term)
– reliability/availability/maintainability
– remote air monitor
RAMC
Resource Allocation and Mine Costing
RAMPAC
radioactive materials packaging
RANN
Research Applied to National Needs (NFS program)
RAO
– remedial action objective
– Research Applications Office (ORNL)
RAP
– Radiological Assistance Program
– Remedial Action Program (DOE)
– Remote Advisory Panel (USAF)
RAPD
– randomly amplified polymorphic DNA
– remedial action program description
RAPIC
Remedial Action Program Information Center
RAS
– radiation alarm system
– Records and Administrative Services
– Request for ADP Services
– Requisition Approval System
– routine analytical service
– Russian Academy of Sciences
RASA
– Radiological Survey Activities (group in HASRD)
– remedial action and survey activities
RASCAL
– Radiation and Standards Calibration Laboratory
– Radiological Assessment System for Consequence Analysis
RASH
Rapid Assessment for the Screening of Hazard
RATP
Robotics Applied Technology Program (DOE-OTD)
RAWC
remedial action waste cleanup
RAXIS
Radionuclide Accelerator X-Ray Information System
RB
– radiant barrier
– reactor building
Rb
rubidium (element, Z = 37)
RBE
relative biological effectiveness
RBL
Radiobioassay Laboratory
RBS
Rutherford backscattering spectroscopy
RBSVS
reactor building special ventilation system
RC
– Rankine cycle
– reactor coolant
– record copy
– resistance capacitance
– resistor-capacitor
RCA
root cause analysis
RCB
Retrieval Containment Building
RCCP
Residential and Commercial Conservation Program
RCCPDS
Reserve Components Common Personnel Data System (ARNG)
RCCS
reactor cavity cooling system
RCD
ruggedized contamination detection
RCDT
reactor coolant drain tank
RCF
refractory ceramic fiber
rcf
relative centrifugal force
RCHX
reactor coolant heat exchanger
RCIC
reactor core isolation cooling
RCIS
reflector coolant isolation system
RCITS
Reactor Coolant Inventory Tracking System
RCM
reliability-centered maintenance
RCO
radiation control officer
RCP
– Radiation Control Program
– reactor coolant pump
RCPB
reactor coolant pressure boundary
RCPCMS
Reactor Coolant Pump Current Monitoring System
RCPMS
Reactor Coolant Pump Monitoring System
RCPVTM
Reactor Coolant Pump Void Trend Monitor
RCRA
Resource Conservation and Recovery Act of 1976 (40 CFR Pts. 240-271; DOE Orders 5400.1 and 5820.2A)
RCRH
Resource Conservation Research House (NAHB and NHE)
RCRIS
Resource Conservation and Recovery Information System (EPA)
RCS
– reactivity control system
– reactor control system
– reactor coolant system
– remote characterization system
– Residential Conservation Service
RCW
recirculating cooling water
RD
–remedial design
– Restricted Data (classification)
RD&D
– research, design, and development
– research, development, and demonstration
RD/RA
remedial design and remedial action
RDA
radiation detection and alarm (system)
RDBMS
relational data base management system
RDC
radon-daughter concentration
RDD
required delivery date
RDDS
resin deuteration-dedeuteration system
RDDTE
research, development, demonstration, testing, and evaluation (also RDDT&E)
RDF
– radical distribution function
– Radiochemical Development Facility (ORNL)
– refuse-derived fuel
RDI
Retirement Disposal Instruction
RDL
reference documentation list
RDLP
research and development limited partership
RDS
– remote data substation
– Remote Disassembly System
RDT
reactor development technology
RDWSP
Residential Drinking Water Sampling Program
RE
– rare earth
– reactive element/dispersoid
Re
– Real (math)
– rhenium (element, Z = 75)
REA
Rural Electrification Administration (USDA)
REAC
Radiation Emergency Assistance Center (ORAU)
REAC/TS
Radiation Emergency Assistance Center/Training Site (ORAU)
REACH
Radiation Effects and Component Hardening
REACT
Retirement Equity Act of 1984
Real-Op
real-time expert system language
REALM
– reactor emergency action level monitor
– reactor emergency alarm level monitor
REARM
Rapidly Emplaced Artillery Resupply Module
REAT
renewable energy applications and training
RECA
Radiation Exposure Compensation Act of 1992
RECAP
Residential Energy Conservation Action Program
RECID
record identifier
RECON
remote console
RED
– responsible engineer/designer
– responsible engineering discipline
REDC
Radiochemical Engineering Development Center
REDCOM
U.S. Readiness Command
REDES
Regional Emission Database and Evaluation System
REE
Resource and Environmental Economics
REED
– Reactor Experimental Engineering Division
– Regional Emissions Evaluation Database
– Rural Electrical Energy Demand (model)
ref(s).
reference(s)
REFLEX
Remote Fluvial Experimental Series
REGNEG
regulatory negotiated rulemaking (preferred over "regneg")
regneg
regulatory negotiated rulemaking ("REGNEG" is preferred)
REIRS
radiation exposure information reporting system
REL
relative exposure limit
RELM
Regional Energy Location Model
rem
[spell out; not an abbreviation but a full word derived from roentgen equivalent man; plural is "rem" or "rems" (DPG prefers "rem" for both singular and plural); convert to SI: sievert (Sv); sometimes "rem" is acceptable]
REM
riverine emergent
REMOTEC
Remote Technology Corporation
REMP
Radiological Environmental Monitoring Program
REMS
Radiation Evaluation and Management System
REOI
request for expression of interest
REP
radiological emergency preparedness
rep
[spell out; not an abbreviation but a full word derived from roentgen equivalent physical; plural is "rep" or "reps"; convert to SI: sievert (Sv); sometimes "rep" is acceptable]
RER
– radiological event report
– regulatory effectiveness review
RERC
– Reactor Experiments Review Committee
– Radiation Effects Research Council
RERTR
Reduced Enrichment Research and Test Reactor
RES
Remote Excavator System
RESA
– Regional Environmental Systems Analysis (NSF project)
– Scientific Research Society of America
RESAR
reference safety analysis report (NRC)
REST
Residence in Science and Technology
RET
renewable energy technology
RETA
R. E. Timm and Associates
RETF
Recycle Equipment Test Facility (Japan)
RETIMAC
real-time material control
RETO
reasonably expected to occur
RETTF
Regional Environmental Technology Transfer Forum
rev.
revision (use in citations)
RF
Rockwell hardness (test)
rf
radio frequency (preferred over "RF")
Rf
rutherfordium (element, Z = 104)
RF
– radio frequency ("rf" is preferred)
– refrigerator/freezer
– Rocky Flats
– Rocky Flats Area Office (DOE)
RFA
– rapid fuel analyzer
– RCRA facility assessment
– regulatory flexibility analysis
– Request for Approval
RFB
Recording for the Blind (Oak Ridge)
RFD
– reference dose
– request for disposal
– reverse-flow diverter
RfD
reference dose (EPA)
RFG
reformulated gasoline
RFG
Regulatory Facility Guide
RFI
– radio-frequency interference
– RCRA facility investigation
– Remedial Facility Investigation
– Remedial Feasibility Investigation
RFO
request for offer
RFP
– request for proposal
– reversed-field pinch
– reversed-field-pinch (device)
– Rocky Flats Plant (Golden, Colorado)
RFPG
Radio Frequency Protection Guide
RFQ
– radio-frequency quadrupole
– Request for Quotation
RFTF
Radio Frequency Test Facility
RFWS
refueling water system
RG
Regulatory Guide (NRC)
RGB
red-green-blue (signal)
RGD
Radiation Generating Device
RGR
relative growth rate
RGT
radcal gamma thermometer
RGTA
radcal gamma thermometer assembly
Rh
rhodium (element, Z = 45)
RH
– relative humidity
– remotely handled
RH-TRU
remotely handled transuranic (waste)
RHA
records holding area
RHCS
radiation-hardened control system
RHEED
reflection high-energy electron diffraction
RHIC
Relativistic Heavy Ion Collider
RHO
Rockwell Hanford Operations
rhp
right half-plane
RHPP
Reproductive Health Protection Program
RHR
residual heat removal
RHT
Radiation Hazard Tag (Form UCN-2785)
RI
– remedial investigation
– Rhode Island (use only with ZIP code addresses)
– Rockwell International
RI/FS
remedial investigation/feasibility study
RI/FS
remedial investigation/feasibility study
RIA
– regulatory impact analysis
– Rock Island Arsenal (U.S. Army)
RIB
– radioactive ion beam
– reflective insulating blinds
RIBI
Radioactive Ion Beam Injector
RIC
– radial inflow converter
– resistor-inductor-capacitor
– Routing Identifier Code
RICS
reactor instrumentation and control system
RID
– reconstructive inverse dynamics
– Registry of Interpreters for the Deaf
– Remove Intoxicated Drivers
– requirements information document
RIDS
Records Inventory and Disposition Schedules
RIF
Reduction in Force
RIHRA
Research to Improve Health Risk Assessments (program)
RII
– rainfall induced infiltration
– recordable injury or illness (incidence rate)
RIIA
Regional Issue Identification and Assessment
RIIC
recordable injury/illness incident case
RIIR
recordable injury/illness rate (per 200,000 employee hours worked)
RIK
replacement in kind
RILWAS
Regional Integrated Lake-Watershed Acidification Study (EPRI)
RIM
– radcal inventory meter
– Recreation Information Management
RIMS
– redundant instrument monitoring system
– resonance ionization mass spectrometry
RIP
– RCRA implementation plan
– reduction in payment
– Regional Inspection Report (NRC)
– Retirement Incentive Program
R/IPC
Records/Information Policy and Compliance
RIR
remedial investigation report
RIS
– radiation-induced segregation
– regulatory impact statement
– Reporting Identification Symbol
– Research Instruments Section (I&C)
– resonance ionization spectroscopy
– Risk Information System
RIS/P
radiation-induced segregation and precipitation
RISC
reduced instruction set computer
RISP
Robotics and Intelligent Systems Program
RITF
Radiological Instrumentation Test Facility
RITTA
RCRA Integrated Training and Technical Assistance
RJB
reference junction box
RJSCEE
Russian Joint Stock Company of Energy and Electrification
RK
river kilometer
RL
Richland Operations Office (DOE)
RLA
running-load amps
RLI
radcal level instrument
RLLC
replacement limited life component
RLP
– Radioluminescent Lighting Program
– rotatable log periodical
RLS
rubber-lined steel
RLU
relative light unit
RM
– reactor manufacturer
– research material
– river mile
RMA
– Radiological Management Area
– Return Merchandise Authorization (Computer Resource Systems)
– Rocky Mountain Arsenal
RMAL
Radioactive Materials Analytical Laboratory (at ORNL)
RMB
Research Management Branch
RMBL
Rocky Mountain Biological Laboratory
RMC
research material collection (inventory; used with loans, isotopes, etc.)
RMCL
recommended maximum contaminant level
RMD
Radiation Monitoring Department
RME
reasonable maximum exposure
RMFE
Russian Ministry of Fuel and Energy
RMI
– Reactive Metals, Inc.
– repetitive motion injury
RMIC
– Regional Medical Information Coalition
– Research Materials Information Center
RMMA
Radioactive Materials Management Area
RMP
– radiological monitoring plan
– risk management plan (EPA)
RMR
Records Management Repository
rms
root mean square (preferred over "RMS")
RMS
– reactor monitoring system
– recoil mass spectrometer
– root mean square ("rms" is preferred)
rms2
square of root mean square
RMSE
root mean square error ("rmse" is preferred)
rmse
root mean square error (preferred over "RMSE")
RMT
Radiological Monitoring Team
RMTT
Resource Management Team
RMU
remote multiplexing unit
RN
– race and national origin (U.S. Army)
– rejection notice
Rn
radon (element, Z = 86)
RNA
ribonucleic acid
RNF
robust notch filter
RO
– reverse osmosis
– Robotics and Process System
RO&DF
Remote Operations and Demonstration Facility
ROA
record of assembly
ROC
– Radioactive Operations Committee
– Reconstitution Operations Center
ROCAP
Regional Office for Central America and Panama (AID)
ROD
– Reactor Operations Division
– Record of Decision
– record of disassembly
rod
[do not abbreviate this word; convert to SI: meter (m)]
ROFT
Rapid Optics Fabrication Technology
ROG
Regional Outreach Group
ROI
– region of influence
– region of interest
– Return on Investment
ROK
Republic of Korea
ROM
– read-only memory
– rough order of magnitude
ROMD
Remote Operation and Maintenance Demonstration
ROP
– record of purchase
– remote operating procedure
ROR
– rate of return
– run of river
RORC
Reactor Operations Review Committee
ROS
Recreation Opportunity Spectrum
ROW
right-of-way (plural is "rights-of-way" or "right-of-ways")
RP
– radiation protection
– release point
– responsible party
RPA
random-phase approximation
RPB
Reclamation Performance Bond
RPC
remote procedure call
RPCS
reactor primary cooling system
RPD
Radiation Protection Department
RPF
radial peaking factor
RPFM
Real Property and Facilities Management (DOE)
RPI
– Rensselaer Polytechnic Institute
– repeating pneumatic injector RPICS
RPIS
Real Property Inventory System (data base) (DOE)
RPL
Raffinate Program License
RPLC
reactor power level controller
RPM
– Reconfiguration Program Management
– Risk-Based Prioritization Model
rpm
revolutions per minute
RPO
Reconfiguration Program Office
RPP
Radiochemical Processing Plant
RPPA
radiological protection program appraisal
RPPP
Radiochemical Processing Pilot Plant
rps
revolutions per second
RPS
reactor protection system
RPSC
Robotics and Process Systems Complex
RPSD
Robotics and Process Systems Division (formerly FRD)
RPSS
– Radiation Protection Surveillance Section
– relative partial sum of squares
RPU
remote pickup
RPV
reactor pressure vessel
RQ
reportable quantity
RR
radiation release
RRA
Revenue Reconciliation Act
RRAC
Reactor Review and Audit Committee
RRAD
Red River Army Depot
RRAP
risk reduction action plan
RRB
Readiness Review Board
RRC
– Reactor Review Committee
– Retiree Relations Center
– Robotics Research Corporation
– Roof Research Center (now BTC) (ORNL)
RRD
Research Reactors Division (ORNL)
RRL
Resumption Request Letter
RRM
Robotics Research Manipulator
RRPM
Regional Recruiting Potential Model
RRPT
Registered Radiation Protection Technologist [when used after a name, RRPT indicates that the individual has successfully completed the National Registry of Radiation Protection Technologists (NRRPT) exam]
RRS
– Radiation Research Society
– Research Reactor Support
RRSG
Research Reactor Support Group
RRT
– reactor research and technology
– Regional Response Team
RSB
– Reactor Support and Operations Building
– reactor support building
RSC
– Regional Service Center
– Research Strategy Council
RSCC
Roane State Community College
RSCI
remote sensor and cable identifier
RSCIS
reactor secondary coolant isolation system
RSCS
reactor secondary cooling system
RSD
– relative standard deviation
– risk-specific dose (EPA)
RSDF
Remote Systems Development Facility
RSG
Research Support Group
RSI
Radiation Sterilizers, Inc.
RSIC
Radiation Shielding Information Center
RSMO
Regional Storage Management Office (DOD)
RSO
– response safety officer
– responsible supervisory official
RSP
Revenue Sharing Program (USBC/DOC)
RSPA
Research and Special Programs Administration (DOT)
RSR
– rapid solidification rate
– Division of Reactor Safety Research (NRC)
RSS
– Reactor Safety Study
– reactor scram system
– Reactor Systems Section (I&C Division, ORNL)
– remote shear system
RSSG
Regional Systems Services Group
RSUC
Residual Stress User Center (HTML)
RSWO
Radioactive Solid Waste Operations
RT
– real time
– refrigeration tons
RTA
real-time analyzer
RTBF
Readiness in Technical Base and Facilities
RTCS
– real-time computer system
– reflector tank cooling system
RTD
– residence time distribution
– resistance temperature detector
– resistance temperature device
– resistive thermal device
RTDP
Robotics Technology Development Program (DOE-OTD)
RTEX
real-time executive
RTF
– Reprocessing Test Facility
– rich text format
– Roof Testing Facility (ORNL)
RTG
– radioisotope thermal generator
– radioisotope thermionic generator
– radioisotope thermolelectric generator
RTI
Research Triangle Institute
RTIL
reactor trip initiation logic
RTNDT
reference nil-ductility transistion temperature
RTP
– Readiness To Proceed
– real-time pricing
– room-temperature phosphorescence
RTR
– real-time radiography
– Regional Training Program
RTRA
Roof Thermal Research Apparatus (ORNL)
RTS
– Radioactive Tracer Survey
– reactor trip subsystem
– reactor trip switchgear
– reactor trip system
– return to service
– Roane Technical Society
RTT
robotics technology testbed
RTU
– remote terminal unit
– remote transponder unit
RTV
– real-time video
– room temperature vulcanizing
RU
regulated unit
Ru
ruthenium (element, Z = 44)
RUID
Requirement Unit Identification
RUMS
Random Utility Model of Consumers' Surplus
RUSTIC
Regional and Urban Studies Information Center
RV
– reactor vessel
– recreational vehicle
– Reentry Vehicle
RVAA
Request for Visit or Access Approval (DOE form)
RVCS
reflector vessel cooling system
RVD
recreation visitor day
RVDT
rotary variable differential transformer
RVHLM
reactor vessel head level monitor
RVLIS
reactor vessel level indicating system
RVLMS
reactor vessel level monitoring system
RVP
Reid Vapor Pressure
RVRLIS
reactor vessel refueling level indication system
RW
Office of Civilian Radioactive Waste Management (DOE) (also DOE/RW; also OCRWM)
RWCU
reactor water cleanup
RWMC
Radioactive Waste Management Complex (INEL)
RWMD
Reservation Waste Management Division
RWOFA
Reimbursable Work for Other Federal Agencies
RWP
– Radiation Work Permit
– Radiological Work Permit
– Residential Weatherization Program
RWQCB
Regional Water Quality Control Board
RWS
– reactor water system
– Rural Water Survey
RWST
refueling water storage tank
RX
– receiver (radio)
– resolver-transmitter
RYM
Refinery Yield Model
°R
degrees Rankine
°Re
degrees Reaumur