Browse Acronyms
Browse the acronym list:
P Listing
P
– phosphorus (element, Z = 15)
– poise [convert to SI: pascal second (Pa · s)]
– property ("Prop" is preferred) (math)
P&A
– planning and analysis
– plugging and abandonment
P&CE
plant and capital equipment
P&DS
Printing and Duplicating Services [now Micrographics and Printing Services (M&PS), a part of IMS]
P&E
Plant and Equipment (Division)
P&I
– piping and instrumentation
– Planning and Integration (organization)
– process and instrumentation
P&ID
piping and instrumentation diagram
P&LRTS
Process and Long-Range Technical Support (program)
P&P
planning and production document
P&PD
production and planning directive (document)
P&S
production and surveillance
P&SE
Program and Systems Engineering (Division) (formed in 1991)
P&T
packaging and transportation
P&TM
planning and technology management
P-T
pressure-temperature
p-type
positive electrical carrier
p. (pp.)
page(s) [use when followed by number(s); spell out at beginning of sentence]
P.L.
Public Law
p.m.
post meridiem (afternoon)
P.R.
Puerto Rico (use after city names in references, lists, tables, footnotes, bibliographies, and indexes; spell out in text)
P/A
propulsion/avionics
P/B
peak to background
P/R
productivity/respiration
P/Y
pitch/yaw
P2
pollution prevention
P2C2
Protect the Environment; Prevent Pollution; Comply with Requirements; Continual Improvements
PA
– Pacific Area Support Office (DOE)
– Pennsylvania (use only with ZIP code addresses)
– performance assessment
– preliminary assessment
– Privacy Act
– process analysis
– production agency
– protected area
– public address (system)
– public affairs
Pa
– pascal
– protactinium (element, Z = 91)
Pa·s
pascal second
Pa·s·m
pascal second meter
Pa·s·m2
pascal second square meter
Pa.
Pennsylvania (use after city names in references, lists, tables, footnotes, bibliographies, and indexes; spell out in text; state name is not needed with Philadelphia or Pittsburgh)
PA/SI
preliminary assessment/site investigation (see DEA, DEIS, DES, DPEIS, EA, EAW, EIA, EIAP, EIS, ER, ERIS, ESR, FEA, FEIS, FES, FPEIS, GEIS, PDEA, PDEIS, PDES, PEIA, PEIS, and SEIS)
PAA
– polyacrylic acid
– primary assigned aircraft
PAAA
Price-Anderson Amendments Act
PAB
performance assessment brine
PAC
– perturbed angular correlation
– probably approximately correct
PAC/CSR
Preadmission Certification/Continuing Stay Review
PACE
– Paper, Allied-Industrial, Chemical and Energy
– Plant Acquisition and Construction Equipment
– plant and capital equipment
PACER
Program for the Acceleration of Commercial Energy Research
PACSE
Permit Attachment for Confined Space Entry
PAD
– Paducah Gaseous Diffusion Plant (also PGDP)
– Paducah Site Office (DOE)
– Policy Analysis and Development (formerly IRPM)
– Program Approval Document
PADD
Petroleum Administration for Defense District
PADRE
Protective Action Dose Reduction Estimator
PADS
Performance Assessment and Development System (at ORNL)
PAE
plans, analysis, and evaluation
PAECE
Protective Action Evaluator for Chemical Emergencies: A Users Manual (U.S. Army)
PAECE
Protective Action Evaluator for Chemical Emergencies
PAES
Power Advisor for Energy Systems
PAF
plasma arc furnace
PAFC
phosphoric acid fuel cell
PAFE
Plasma Arc Furnace Experiment
PAG
Protection Action Guide
PAGIS
Performance Assessment of Geological Isolation Systems
PAH
– polyaromatic hydrocarbon
– polycyclic aromatic hydrocarbon
PAL
– phenylalanine ammonia lyase
– programmable array logic
PALS
– Partners at the Laboratory in Science (ORNL program)
– Payroll, Absence, and Labor System
PAM
– perimeter air monitor
– postaccident monitoring
PAM&T
Production Association, Materials, and Interplant Tranfers
PAME
primary amoebic meningoencephalitis
PAMS
postaccident monitoring system
PAN
passive-active neutron
PAO
– Princeton Area Office (DOE)
– Public Affairs Office
– public affairs officer
PAPO
Performance Assurance Project Office
PAR
– photosynthetically active radiation
– Protective Action Recommendation
PARCC
precision, accuracy, representativeness, completeness, and comparability
PARR
projected annual reactor requirements
PARSAC
programmable advanced RADIAC sound annunciator chip
PAS
pollution abatement system
PASNY
Power Authority for the State of New York
PASS
postaccident sampling system
PATCO
Professional, Administrative, Technical, Clerical, and Other
PAVE
Precision Acquisition Vehicle Entry
PAWS
Phased Array Warning System
PB
polybutylene
Pb
lead (element, Z = 82)
PB&C
planning, budget, and control
Pb/acid
lead acid (battery)
PBA
Pine Bluff Arsenal
PBAA
Preliminary Business Area Analysis
PBB
polybrominated biphenyl
PBBS
Procurement Bulletin Board System
PBCO
praseodymium
PBF
Power Burst Facility
PBFA
Particle Beam Fusion Accelerator
PBFR
Power Burst Facility Reactor
PBGC
Pension Benefit Guarantee Corporation
PBMP
polychlorinated biphenyl monitoring plan
PBR
– pebble bed reactor
– permit-by-rule
PBV
Post-Boost Vehicle
PBX
– Princeton Beta Experiment
– private branch exchange
pc
polycrystalline
PC
– personal computer
– pitch-catch
– Placement Center (now Career Center)
– Position Charter
– potential carcinogen
– printed circuit
PC Plan
Management Plan for Personal Computers and Word Processors
PC/PM
personal computer/project management
PC/TCP
Personal Computer/Transmission Control Protocol
PCA
– physical configuration audit
– pool critical assembly
– Portland Cement Association
– primary candidate alloy
– prime candidate alloy
– principal components analysis
PCAP
Production Capability Assurance Program
PCB
– polychlorinated biphenyl
– printed circuit board
PCBF
Printed Circuit Board Facility
PCC
Paducah Community College
PCCAP
plant computing and communications architecture plan
PCCB
– Procedure Change Control Board
– project configuration control board
PCD
– product conversion demonstration (AVLIS)
– program control document
– project control document
– proposed consent decreePCDAS
PCDF
polychlorinated dibenzofuran
PCE
– perchlorethane
– perchloroethylene
– tetrachloroethene
– tetrachloroethylene
PCEPD
President's Committee on Employment of People with Disabilities
PCF
plasma centrifugal furnace
pcf
pounds per cubic foot [convert to SI: kilograms per cubic meter (kg/m3)]
PCI
– peripheral component interconnect
– postcollision interaction
– Prestressed Concrete Institute
pCi
picocurie [convert to SI: becquerel (Bq); sometimes "curie" is acceptable]
PCIS
Personal Computer Inventory System
PCK
Poplar Creek kilometer
PCLA
pressure containment lower assembly
PCM
– personnel contamination monitor
– phase-change material
– phase contrast microscopy
– postclosure monitoring
– process control module
PCNIU
personal computer network interface unit
PCO
project control order
pCO2
partial pressure of carbon dioxide
PCOC
– potential contaminants of concern
– Practical Conference on Communication
PCP
pentachlorophenol
PCPA
Postclosure Permit Application
PCR
– polymerase chain reaction
– project change request
PCRV
prestressed concrete reactor vessel
PCS
– photoconductive power switch
– plant control system
PCSC
Personal Computer Support Complex
PCT
Personal Computing Technologies
PCTF
Plant Component Test Facility
PCTR
physical constants test reactor
PCTT
pitch-catch through transmission
PCU
platinum cobalt unit
PCUA
pressure containment upper assembly
PCUG
PC Users' Group
PCV
– petty cash voucher
– pressure control valve
PCVN
precracked Charpy V-notch
PCW
process cooling water
Pd
palladium (element, Z = 46)
PD
– process design
– program director
– Physics Division
– Publications Division (now Publishing Services, a part of IMS)
PDA
Personal Digital Assistant
PDC
– Performance Documentation Checklist
– programmable digital controller
– proposed design change
PDE
– partial differential equation
– Process Design Engineering
PDEA
preliminary draft environmental assessment (see DEA, DEIS, DES, DPEIS, EA, EAW, EIA, EIAP, EIS, ER, ERIS, ESR, FEA, FEIS, FES, FPEIS, GEIS, PA/SI, PDEIS, PDES, PEIA, PEIS, and SEIS)
PDEIS
preliminary draft environmental impact statement (see DEA, DEIS, DES, DPEIS, EA, EAW, EIA, EIAP, EIS, ER, ERIS, ESR, FEA, FEIS, FES, FPEIS, GEIS, PA/SI, PDEA, PDES, PEIA, PEIS, and SEIS)
PDES
preliminary draft environmental statement (see DEA, DEIS, DES, DPEIS, EA, EAW, EIA, EIAP, EIS, ER, ERIS, ESR, FEA, FEIS, FES, FPEIS, GEIS, PA/SI, PDEA, PDEIS, PEIA, PEIS, and SEIS)
PDF
– plant design factor
– Portable Document Format
– Position Data Form
PDM
– programmed depot maintenance (USAF)
– Project Description Memorandum
PdM
predictive maintenance
PDN
Public Data Network
PDPM
pyrochemical and dry processing method
PDR
Plant Design Requirement
PDRD
Plant Directed Research, Development, and Demonstration
PDS
– partitioned data set
– plant display system
– Process Development Section (CTD)
– project data sheet
PDSI
Palmer Drought Severity Index
PDU
plasma display unit
PDUCP
Plant Depleted Uranium Consolidation Project
PDW
probability density weighting
PDWF
project director's working file
PE
– Planning and Evaluation [Division (of EPRI)]
– Philadelphia Electric Company
– polyethylene
– Portsmouth Enrichment Office (DOE)
– power electronic
– power equivalent
– principal engineer
– processing element
– Professional Engineer
– project engineer
PEA
Preliminary Energy Audit
PEAC
Power Electronics Application Center (TCRD)
PEB
Process Evaluation Board
PEC
– Performance Evaluation Committee
– Performance Evaluation Criteria
– Phoenix Electric Company
– Professional Engineer Certification
– Program Execution Committee
PED
– photoemission diode
– Project Engineering Design
PEG
– Performance Evaluation Group
– Project Evaluation Group
PEH
high-density polyethylene (also HDPE)
PEHX
cross-linked, high-density polyethylene (also HDPEX and XHDPE)
PEIA
programmatic environmental impact analysis (see DEA, DEIS, DES, DPEIS, EA, EAW, EIA, EIAP, EIS, ER, ERIS, ESR, FEA, FEIS, FES, FPEIS, GEIS, PA/SI, PDEA, PDEIS, PDES, PEIS, and SEIS)
PEIS
programmatic environmental impact statement (see DEA, DEIS, DES, DPEIS, EA, EAW, EIA, EIAP, EIS, ER, ERIS, ESR, FEA, FEIS, FES, FPEIS, GEIS, PA/SI, PDEA, PDEIS, PDES, PEIA, and SEIS)
PEL
– low-density polyethylene (also LDPE)
– permissible exposure limit
PELX
cross-linked, low-density polyethylene (also LDPEX and XLDPE)
PEM
– portable energy monitor
– process equipment modifications
– process empirical modeling
– proton exchange membrane (fuel cell)
PEMP
Process Equipment Modification Program
PENDOS
personnel neutron dosimeter/spectrometer
PEO
power equipment operator
PEP
– peak envelope power
– pellet-enhanced performance
– Performance Evaluation Plan
– powder-filled evacuated panel (superinsulation)
– Project Execution Plan
PERALS
photon-electron rejecting alpha liquid scintillation
PERC
perchloroethylene
PERM
permanent circuit (computer term)
PERT
program evaluation review technique
PES
– Performance Enhancement System
– Plant Emergency Squad
– Power Engineering Society (IEEE)
PESC
passivated emitter solar cell
PESL
Physical and Electrical Standards Laboratory
PET
– polyethylene terephthalate
– positron-emission tomograph (scanner)
– process evaluation test
– Product Engineering Transmittal
– Proficiency Environmental Testing
PETC
Pittsburgh Energy Technology Center
PEU
process equipment uprating
PEV
process evaluator
PEX
cross-linked polyethylene (also XLPE)
pF
picofarad
PF
– poloidal field
– power factor
– program function
– protective force
– polyurethane foam
PFA
perfluoroalkyoxy-alkanes
PFBC
pressurized fluidized-bed combustion
PFD
– personal flotation device
– Production Facilities Department
PFM
pulse frequency modulation
PFMS
Precision Flexible Manufacturing System
PFPR
Plutonium Fuel Processing Facility (OEC of PNC, Japan)
PFR
Phoenix Ford Reactor (University of Michigan)
PFS
Parallel File System (Intel)
PFTF
Purex Flowsheet Test Facility
PG&E
Pacific Gas and Electric Company
PGA
peak ground acceleration
PGAA
prompt-gamma activation analysis
PGDP
Paducah Gaseous Diffusion Plant (also PAD)
PGM
Precision Guided Munition
pH
pH (hydrogen-ion concentration notation)
PH
– phenanthrene
– phot [convert to SI: lumens per square meter(lm/m2)]
Ph.D.
Doctor of Philosophy
PH3
phosphine (gas)
PHA
Preliminary Hazard Analysis
PHE
public health evaluation
PHENIX
photon electron new heavy ion experiment
PHILMS
Photographic Inventory Logistics Management System
PHP
Preferred Health Partnership
PHS
– preliminary hazard screening
– Public Health Service
PHSA
Public Health Service Act of 1965
PHWR
pressurized heavy-water reactor
PI
– Pellissippi International
– performance indicator
– Pinellas Area Office (DOE)
– plasma-interactive
– polyisocyanurate
– preliminary inquiry
– principal investigator
– proportional-integral
PI&A
Program Integration and Administration
PIC
– polymer-impregnated concrete
– power integrated circuit
– probe interface chip
– product of incomplete combustion
– Project Information Center
– proportional-integral controller
PICS
– Partnership in Computational Science (consortium)
– process inventory control system
PID
– photoionization detector
– Planning Information Document
– proportional-integral-derivative
PIDAS
Perimeter Intrusion Detection and Assessment System
PIE
postirradiation examination
PIF
Proposal Information Form
PIG
– particulate, iodine, and gas
– Phillips ion gage
PIH
poison by inhalation
PILOT
payment in lieu of taxes
PIMA
Polyisocyanurate Insulation Manufacturers Association
PIN
– P-intrinsic-N
– positive-intrinsic-negative
PIO
– pilot-induced oscillation
– public information officer
PIP
– part in position
– Performance Improvement Process/Program/Project
– Program Implementation Plan
– Public Involvement Plan
PIR
– Phenomena Identification and Ranking
– polyisocyanurate
PIRG
public interest research group
PIRLA
Paleoecological Reconstruction of Recent Lake Acidification (EPRI)
PIRO
Petroleum Industry Response Organization
PISA
potential inadequacy of safety analysis
PITA
performance indicator and trend analysis system
PITF
Pipe Impact Test Facility (ORNL)
PITS
– plant inventory trending system
– primary inventory trending system
PIUS
process-inherent ultimate safety
PIV
postindicating valve
PJ
picojoule
PL
Public Law ("Pub. L." is preferred)
PLA
pulsed-laser-annealed (cell type)
PLBR
prototype large breeder reactor
PLC
– power line carrier
– programmable logic controller
PLCEDM
part-length control element drive mechanism
PLD
pulsed-layer deposition
PLEX
plant life extension
PLF
preload function
PLFA
phospholipid fatty acid
PLL
phase lock loop
PLRTS
process and long-range technical support
PLSC
prime lump-sum contractor
PLT
Princeton Large Torus
PLV
– pay in lieu of vacation
– production-level video
PM
– particulate matter
– particulate mercury
– phase margin
– phase modulation
– photomultiplier
– predictive maintenance
– preventive maintenance
– program manager
– programmed maintenance
– project management
– project manager
Pm
promethium (element, Z = 61)
PM-AMMOLOG
Program Manager, Office of Ammunition Logistics
PM-ECM
permanent-magnet electronically commutated motor
PM/SO2
particulate matter and sulfur dioxide
PM/WSL
priority materials/waste stream list
PM10
particulate matter less than 10 micrometers (PM < 10 µm) in diameter
PMA
Power Marketing Associations
PMAA
Petroleum Marketers Association of America
PMAR
Procurement Management Assistance Review
PMB
plastic media blasting
PMC
– Performance Management Council
– Personnel Management Committee
– precious metals coordinator
– Project Management Corporation
PMCD
program manager for chemical demilitarization
PMD
– Petroleum Marketing Division (EIA)
– process method development
– production methods development
– Program Management Division
PMDF
– Pascal Mail Distribution Facility
– Production Methods Development Facility
PMED
Personnel and Management Evaluation Division
PMEL
Precision Measurement Equipment Laboratory
PMF
probable maximum flood (flooding with dam break; see MPF)
PMI
– Precision Machining, Inc.
– Project Management Institute
PMIC
– Performance Management Improvement Council
– Personnel Management Improvement Committee
PMN
premanufacture notice
PMO
Project Management Office (U.S. Army)
PMP
– phase-measuring profilometry
– Pontryagin's Maximum Principle
– Program Management Plan
– project management plan
PMR
– Procedure Modification Request
– proportionate mortality ratio
PMS
– plant monitoring system
– Project Management System
PMSR
project management summary report
PMT
– Performance Measurement Team (a TQM term)
– photomechanical transfer (produces screened halftones)
– photomultiplier tube
– Process Management Team (used in IMS)
PMTC
Precision Manufacturing Technology Center
PMU
Production and Maintenance Union
pn junction
interface between p-type (positive) and n-type (negative) electrical carriers
PNA
polynuclear aromatic hydrocarbons
PNAD
personal nuclear accident dosimetry
PNC
Power Reactor and Nuclear Fuel Development Corporation (Japan)
PNGV
Partnership for a New Generation of Vehicles
PNL
Pacific Northwest Laboratory (Richland, Washington); now Pacific Northwest National Laboratory (PNNL)
PNLM
maximum perceived noise level
PNNL
Pacific Northwest National Laboratory (formerly PNL)
pnp
positive-negative-positive (transistor)
PNP
purine nucleoside phosphorylase
PNR
Pittsburgh Naval Reactors Office (DOE)
Po
polonium (element, Z = 84)
PO
purchase order
POA
Plan of Action
POC
– particulate organic carbon
– performance objectives and criteria
– point of compliance
– point of contact
– purgeable organic carbon
POD
– Plan of the Day
– point of diversion (e.g., of stream)
– port of debarkation
– process operating diagram
POE
– port of embarkation
– point of exposure
POG
project officer group
POHC
principal organic hazardous constituent
POL
petroleum, oil, and lubricants
POM
– polycyclic organic matter
– Program Objective Memorandum
PON
Program Opportunity Notice
POP
– Post Office Protocol (computer mail server)
– proof of principle
PORC
Plant Operations Review Committee
PORT
Portsmouth Site Office (DOE)
PORTS
Portsmouth Gaseous Diffusion Plant (see PUEP)
PORV
power-operated relief valve
POTW
publicly owned treatment work
POV
privately owned vehicle
POX
purgeable organic halides
pp
peak to peak
PP
– pilot plant
– polypropylene
– Powerhouse Project (K-25)
– preliminary proposal
– preparatory procedure
PP&A
Program Planning and Analysis Office (ORNL)
PP&L
Pacific Power & Light
PPA
– Pollution Prevention Act of 1990
– Property Protection Area
PPAC
parallel-plate avalanche counter
PPAD
parallel-plate avalanche detector
PPAN
Pollution Prevention Awareness News
PPAP
Pollution Prevention Awareness Program
ppb
parts per billion
PPBRS
Program Planning, Budgeting, and Review System
PPBS
Planning, Programming, Budgeting System
PPC
– Personal Performance Consultants
– plant procurement coordination
– Pollution Prevention Council
PPCP
Preparedness Prevention and Contingency Plan
PPD
Production Program Definition Document
PPDD
preliminary project design description
PPE
personal protective equipment
PPFD
photosynthetic photon flux density
PPI
– Plastics Pipe Institute
– point polarization interferometer
– process prove-in
– producer price index
PPIFUA
Power Plant and Industrial Fuel Use Act of 1977
PPISIG
Professional Publishing and Illustration Special Interest Group
PPM
Policy Procedures Manual
ppm
parts per million
PPO
– Plant Publications Office (Publishing Services)
– Portsmouth Project Office (DOE)
– Preferred Provider Organization
PPOA
Pollution Prevention Opportunity Assessment [formerly Pollution Waste Assessment (PWA)]
PPP
– paper-polypropylene-paper
– Point-to-Point Protocol
– Pollution Prevention Program
PPPD
pilot production program definition
PPPL
Princeton Plasma Physics Laboratory
PPPP
Pollution Prevention Program Plan
PPR
Performance Planning and Review [now Development, Planning, and Performance Review (DPPR)]
ppr
pulses per revolution
PPRP
Pollution Prevention Research Program
PPRS
Performance Planning and Review System
PPS
– plant protection system
– polyphenylene sulfide
pps
pulses per second
PPSC
Personal Publishing Support Complex
PPSG
power purchase strategy guideline
PPSO
Personal Property Shipping Office (DOD)
ppt
– parts per thousand
– pellet propulsion technology
– precipitate
PR
– preliminary review
– press release
– pressure rated
– procurement request
– Puerto Rico (use only with ZIP code addresses)
Pr
praseodymium (element, Z = 59)
PRA
probabilistic risk assessment
PRAISDPO
PRAISE Discrete Probability Distribution
PRAM
Predictive Reliability Assessment Model
PRBS
psuedorandom binary sequence
PRC
– People's Republic of China (mainland China)
– Project Review Committee
PRCPTS
primary reactor coolant pump trip system
PRD
– Public Relations Department
– proposed reference design
PRDA
Program Research and Development Announcement
PRDI
Personal Radiation Detection Instrument
PRDS
Production Reports Distribution System
PREPP
Process Experimental Pilot Plant
PRF
Plutonium Recovery Facility
PRFD
Personal Radio-Frequency Dosimeter
PRG
preliminary remediation goal
PRIMEX
primary extraction system (see SECEX)
PRIP
Productivity and Radiological Improvement Program
PRISM
– Power Reactor Inherently Safe Module
– Princeton Scorekeeping Method
PRM
– personal radiation monitor
– protection relay module
PRMP
– Plutonium Recovery Modernization Project
– Postremoval Monitoring Plan
PRNC
Puerto Rico Nuclear Center
Prob
probability (math)
PROM
programmable read-only memory
Prop
property (preferred over "P") (math)
PRP
– potentially responsible party
– Productivity Retention Program
PRR
Protective Response Recommendation
PRS
– perforation registration system
– Production Requirements System
PRSA
Public Relations Society of America
PRSS
primary reactor shutdown system
PRTF
Plating Rinsewater Treatment Facility
PRWTF
Plating Rinse Water Treatment Facility
PS
– performance specification
– Philadelphia Support Office (DOE)
– photosynthesis
– Protective Services (organization)
PSA
– performance self-assessment
– Problem Statement Analyzer
– Puget Sound Area
PSAM
Physical Sciences and Advanced Materials (Organization)
PSAP
Personnel Security Assurance Program (DOE)
PSAR
preliminary safety analysis report
PSAT
partial site acceptance test
PSC
– process support cell
– Public Service Commission (State of Tennessee)
– public service company
PSD
– Physical Security Department
– plasma spray deposition
– power spectral density
– prevention of significant deterioration
– Process Support Division
– Protective Services Department (OLP)
PSDREC
Power Spectral Density Recognition (system)
PSEI
playback system electronic interface
PSES
pretreatment standard for existing sources
PSET
Plant Safety Evaluation Team
PSF
– performance shaping factor
– point spread function
– prime solar fraction
– print services facility
– production support facility
psf
pounds per square foot [convert to SI: kilograms per square meter (kg/m2)]
psi
pounds per square inch [convert to SI: pascal (Pa)]
PSI
– Process Safety Institute
– Professional Secretaries International
– Pulse Sciences, Inc.
psia
pounds per square inch, absolute [convert to SI: pascal (Pa)]
psid
pounds per square inch, differential [convert to SI: kilograms per square meter (kg/m2)]
PSID
preliminary safety information document
psig
pounds per square inch, gage [convert to SI: kilograms per square meter (kg/m2)]
PSIM
power systems information management
PSL
Problem Statement Language
PSLC
Proprietary Software License Compliance (ESS-CU-120)
PSM
– Packaging Systems Management
– process safety management
PSMS
plant safety monitoring system
PSN
proper shipping name (for hazardous material transport)
PSO
– Pacific Site Office (DOE)
– principal secretarial officer
– Program Secretarial Office
– program senior official
– Protective Services Organization
PSP
– Performance Sharing Plan
– protective shipping package
PSPC
position-sensitive proportional counter
PSQ
Personnel Security Questionnaire
PSR
preliminary safety report
PSRA
probabilistic seismic risk assessment
PSRC
Power Systems Relaying Committee
PSS
– Plant Shift Superintendent
– problem safety summary (ORNL)
– project schedule sheet
PST
– pair-selected ternary
– Plant Safety Evaluation Team
PSTCC
Pellissippi State Technical Community College
PSTM
photon scanning tunneling microscope
PSTP
Power Systems Technology Program
PSW
– phosphate/scrapped waste
– phosphate/sulfate waste
PSZ
partially stabilized zirconia
Pt
platinum (element, Z = 78)
PT
– part-time
– performance testing
– potential transformer
Pt(s).
Part(s) [use when followed by number(s); spell out at beginning of sentence]
PTA
plant test authorization
PTE
part-time employee
PTF
phase transfer function
PTFE
polytetrafluoroethylene
PTH
parathyroid hormone
PTI
– permits-to-install
– Post-Tensionary Institute
– Power Technologies, Inc.
PTO
permit to operate
PTP
– P-terphenyl
– Plant Test Program
PTR
Property Transfer Record (Form UCN-541)
PTS
– pressurized thermal shock
– progress tracking system
– project tracking system
PTU
pole-top unit
PTUC
PTU controller card
Pu
plutonium (element, Z = 94)
PUB
process utility building
Pub. L.
Public Law (preferred over "PL")
PUC
Public Utility Commission
PUCIP
Public Utility Conservation Investment Program
PUEP
Portsmouth Uranium Enrichment Plant (see PORTS)
PUI
Power Utilization Index
PUR
polyurethane
PUREX
plutonium/uranium extraction
PURPA
Public Utility Regulatory Policies Act of 1978
PURTA
Public Utilities Realty Tax Assessment of 1970
PV
photovoltaic
PVA
precipitate-void association
PVC
polyvinylchloride
PVDF
polyvinylidene fluoride
PVEC
photovoltaic energy conversion
PVM
parallel virtual machine
PVRC
Pressure Vessel Research Council
PVRUF
Pressure Vessel Research Users' Facility (ORNL)
PVT
– pressure-volume-temperature
– pressure-volume-time
PVTB
– Producibility Validation Test Bed
– Productivity and Validation Test Bed
PW
– present worth
– process waste
PW&CH
programmed work and computer history
PWA
– Pollution Waste Assessment [now Pollution Prevention Opportunity Assessment (PPOA)]
– process waste assessment
– Project Work Authorization
PWB
Programmer Work Bench
PWBA
plane-wave Born approximation
PWF
permanent wood foundation
PWHT
postweld heat treatment
PWL
piecewise linear (model)
PWM
– process waste monitoring
– pulse-width modulated
PWMI
pulse-width modulated inverter
PWMP
– Pond Waste Management Project
– project waste management plan
PWMS
Process Waste Monitoring System
PWR
pressurized-water reactor
PWS
Plant-Window System
PWSU
Potable Water System Upgrade
PWTF
Production Waste Treatment Facility
PWTFII
Production Waste Treatment Facility II
PWTP
Process Waste Treatment Plant
PWWTF
Process Wastewater Treatment Facility
PX
Phoenix Area Office (DOE)
Px or PX
Pantex Plant (Amarillo, Texas)
PY
prior year
PZPGA
peak zero period ground acceleration
PZR
pressurizer
PZT
piezoelectric crystal
φ
phase