| AC |
Alternating Current |
| ADS |
Automatic Depressurization System |
| AEF |
Annual Exceedance Frequency |
| ALWR |
Advanced Light Water Reactor |
| ANS |
American Nuclear Society |
| AOPs |
Abnormal Operating Procedures |
| AOT |
Allowed Outage Time |
| APC |
Atmospheric Pressure Change |
| ASCE |
American Society Of Civil Engineers |
| ASEP |
Accident Sequence Evaluation Program |
| ASME |
American Society Of Mechanical Engineers |
| ASTM |
American Society For Testing And Materials |
| ATHEANA |
A Technique For Human Event Analysis |
| ATWS |
Anticipated Transient Without Scram |
| BDD |
Binary Decision Diagram |
| BOP |
Balance Of Plant |
| BWR |
Boiling-Water Reactor |
| C&C |
Components And Cladding |
| CBDT |
Cognitive-Based Decision Tree |
| CCDF |
Complementary Cumulative Distribution Function |
| CCDP |
Conditional Core Damage Probability |
| CCF |
Common Cause Failure |
| CC-I/CC-II |
Capability Categories I And II |
| CCW |
Component Cooling Water |
| CDF |
Core Damage Frequency |
| CDFM |
Conservative Deterministic Failure Margin |
| CEUS |
Central And Eastern United States |
| CF |
Circuit Failure Analysis (Internal Fire Technical Element) |
| CFD |
Computational Fluid Dynamics |
| CFR |
U.S. Code Of Federal Regulations |
| CLERF |
Conditional Large Early Release Probability |
| CS |
Cable Selection And Location (Internal Fire Technical Element) |
| CT |
Cooling Tower |
| DC |
Direct Current |
| DCF |
Dose Conversion Factor |
| DHR |
Decay Heat Removal |
| DOE |
Us Department Of Energy |
| DW |
Drywell |
| EAB |
Exclusion Area Boundary |
| ECCS |
Emergency Core Cooling System |
| EDG |
Emergency Diesel Generator |
| EOPs |
Emergency Operating Procedures |
| EPIX |
Equipment Performance And Information Exchange System |
| EPRI |
Electric Power Research Institute |
| EPZ |
Emergency Planning Zone |
| ES |
Initiating Events And Equipment Selection (Internal Fire Technical Element) |
| FAQ |
Frequently Asked Question |
| F-C |
Frequency Consequence |
| FEG |
Functional Equipment Group |
| FHR |
Fire Human Reliability Analysis (Internal Fire Technical Element) |
| FMEA |
Failure Modes And Effects Analysis |
| FQ |
Fire Risk Quantification (Internal Fire Technical Element) |
| FSAR |
Final Safety Analysis Report |
| FSS |
Fire Scenario Selection And Analysis (Internal Fire Technical Element) |
| FV |
Fussell-Vesely |
| GIP |
Generic Implementation Procedure |
| GMC |
Ground Motion Characterization |
| GMM |
Ground-Motion Model |
| GMPE |
Ground Motion Prediction Equation |
| GRS |
Ground Response Spectra |
| HAZOPS |
Hazards And Operability Study |
| HCLPF |
High Confidence Of A Low Probability Of Failure |
| HCR/ORE |
Human Cognitive Reliability/Operator Reliability Experiment |
| HEAF |
High Energy Arcing Fault |
| HELB |
High Energy Line Break |
| HEP |
Human Error Probability |
| HFE |
Human Failure Event |
| HLR |
High Level Requirement |
| HRA |
Human Reliability Analysis |
| HROI |
Hazard Range Of Interest |
| HRR |
Heat Release Rate |
| HTGR |
High-Temperature Gas-Cooled Reactors |
| HVAC |
Heating, Ventilation, And Air Conditioning |
| HW |
High Wind |
| HWEL |
High Wind Equipment List |
| HWPRA |
High Wind Pra |
| HWTL |
High-Wind Target List |
| I&C |
Instrumentation And Control |
| IDHEAS |
An Integrated Human Event Analysis System |
| IE |
Initiating Event |
| IFPRA |
Internal Flooding Pra |
| IGN |
Ignition Frequency (Internal Fire Technical Element) |
| IPE |
Individual Plant Examination |
| IPEEE |
Individual Plant Examination Of External Events |
| ISI |
In-Service Inspection |
| ISLOCA |
Interfacing-System Loss-Of-Coolant Accident |
| ISRS |
In-Structure Response Spectra |
| LAR |
License Amendment Request |
| LBE |
Licensing Basis Event |
| LCO |
Limiting Condition Of Operation |
| LERF |
Large Early Release Fraction |
| LIP |
Local Intense Precipitation |
| LLNL |
Lawrence Livermore National Laboratory |
| LMP |
Licensing Modernization Project |
| LMR |
Liquid Metal-Cooled Fast Reactor |
| LOCA |
Loss-Of-Coolant Accident |
| LOOP |
Loss Of Offsite Power |
| LPSD |
Low Power And Shutdown |
| LWR |
Light Water Reactor |
| MCB |
Main Control Board |
| MCC |
Motor Control Center |
| MCR |
Main Control Room |
| MCRA |
Main Control Room Abandonment |
| MCUB |
Minimum Cutset Upper Bound |
| MGL |
Multiple Greek Letter |
| MHTGR |
Modular High-Temperature Gas-Cooled Reactor |
| MOV |
Motor-Operated Valve |
| MSO |
Multiple Spurious Operation |
| MSR |
Motlten Salt Reactor |
| NDM |
Newly Developed Method |
| NEI |
Nuclear Energy Institute |
| NFPA |
National Fire Protection Association |
| NMA |
Nonmandatory Appendix |
| non-LWR |
Non-Light Water Reactor |
| NPP |
Nuclear Power Plant |
| NPSH |
Net Positive Suction Head |
| NRC |
U.S. Nuclear Regulatory Commission |
| NRR |
(NRC) Office Of Nuclear Reactor Regulation |
| NSP |
Non-Suppression Probability |
| NSSS |
Nuclear Steam Supply System |
| NTTF |
Near-Term Task Force |
| NUREG |
U.S. Nuclear Regulatory Commission Technical Report Designation |
| NUREG/CR |
Contractor-Prepared Nureg |
| OSP |
Off-Site Power |
| P&IDs |
Piping And Instrumentation Drawings (Or Diagrams) |
| PAU |
Physical Analysis Unit |
| PBMR |
Pebble Bed Modular Reactor |
| PDS |
Plant Damage State |
| PEER |
Pacific Earthquake Engineering Research (Center) |
| PFHA |
Probabilistic Flood Hazard Analysis |
| PGA |
Peak Ground Acceleration |
| PHA |
Process Hazards Analysis |
| PMF |
Probable Maximum Flood |
| PP |
Plant Boundary Definition And Partitioning (Internal Fire Technical Element) |
| PRA |
Probabilistic Risk Assessment |
| PRM |
Plant Response Model (Internal Fire Technical Element) |
| PSF |
Performance Shaping Factor |
| PSHA |
Probabilistic Seismic Hazard Analysis |
| PWHA |
Probabilistic Wind Hazard Analysis |
| PWR |
Pressurized-Water Reactor |
| PWROG |
Pressurized Water Reactor Owners Group |
| QA |
Quality Assurance |
| QHO |
Quantitative Health Objective |
| QLRA |
Qualitative Risk Assessments |
| QLS |
Qualitative Screening (Internal Fire Technical Element) |
| RAI |
Request For Additional Information |
| RAW |
Risk Achievement Worth |
| RCB |
Reactor Coolant System Boundary |
| RCF |
Release Category Frequency |
| RCP |
Reactor Coolant Pump |
| RCS |
Reactor Coolant System |
| RE |
Reference Earthquake |
| RES |
(NRC) Office Of Nuclear Regulatory Research |
| RG |
Regulatory Guide |
| RHR |
Residual Heat Removal |
| RIDM |
Risk-Informed Decision-Making |
| RMIEP |
Risk Methods Integration And Evaluation Program |
| RMW |
Radius Of Maximum Winds |
| RPV |
Reactor Pressure Vessel |
| RSDP |
Remote Shutdown Panel |
| SA |
Spectral Acceleration |
| SAR |
Safety Analysis Report |
| SBO |
Station Blackout |
| SCDF |
Seismic Core Damage Frequency |
| SCR |
Screening Criteria |
| SEL |
Seismic Equipment List |
| SER |
Safety Evaluation Report |
| SFA |
Seismic Fragility Analysis |
| SGTR |
Steam Generator Tube Rupture |
| SHA |
Seismic Hazard Analysis |
| SHARP1 |
Revised Systematic Human Action Reliability Procedure |
| SLCS |
Standby Liquid Control System |
| SLERF |
Seismic Large Early Release Frequency |
| SMR |
Small Modular Reactor |
| SOKC |
State-Of-Knowledge Correlation |
| SOV |
Separation Of Variables |
| SPAR-H |
Standardized Plant Analysis Risk Human Reliability Analysis |
| SPID |
Screening, Prioritization, And Implementation Details |
| SPR |
Seismic Plant Response Analysis |
| SPRA |
Seismic Probabilistic Risk Assessment |
| SQUG |
Seismic Qualification Utility Group |
| SR |
Supporting Requirement |
| SRP |
Standard Review Plan |
| SSCs |
Systems, Structures, And Components |
| SSHAC |
Senior Seismic Hazard Analysis Committee |
| SSI |
Soil-Structure Interactions |
| SW |
Service Water |
| TEDE |
Total Effective Dose Equivalent |
| THERP |
Technique For Human Error Rate Prediction |
| THIEF |
Thermally Induced Electrical Failure |
| TMRE |
Tornado Missile Risk Evaluator |
| TMSC |
Tornado Missile Strike Calculator |
| TORMIS |
Tornado Missile |
| TS |
Techncial Specifications |
| TSTF |
Technical Specifications Task Force |
| UHS |
Uniform Hazard Response Spectrum |
| USI |
Unresolved Safety Issue |
| V&V |
Verification And Validation |
| V/H |
Vertical-To-Horizonal (Ratio) |
| VEWFD |
Very Early Warning Fire Detection |
| VL |
Lower Bound Wind Speed Magnitude |
| WCAP |
Westinghouse Commercial Atomic Power (Report) |
| XFEL |
External Flood Equipment List |
| XFPRA |
External Flood Pra |
| ZOI |
Zone Of Influence |