Data Reporting Instructions

​​​​​These Data Reporting Instructions (DRI) were developed to assist utility personnel in reporting information to the North American Electric Reliability Corporation’s (NERC) Generating Availability Data System (GADS). This reporting system, initiated by the electric utility industry in 1982, expands and extends the data collection procedures begun by the industry in 1963. NERC GADS is recognized today as a valuable source of reliability, availability, and maintainability (RAM) information. This information, collected for both total unit and major equipment groups, is used by analysts industry-wide in numerous applications. GADS maintains operating histories on more than 5,000 generating units. As of January 1, 2013, GADS reporting became mandatory for conventional generating units that are 20 MW and larger. GADS is open to any organization (domestic or international) that operates electric generating facilities and is willing to follow the GADS reporting requirements.

The final version of the 2022​ GADS DRI is provided below. 

 
  
  
  
2023_GADS_Cause_Codes.xlsx2023 GADS Cause Codes1/1/2023
GADS_DRI_2023.pdf2023 GADS Data Reporting Instructions1/1/2023
Appendix_A_Change_of_Unit_Status_2023_DRI.pdfAppendix A: Change in Unit Status Reporting Form1/1/2023
Appendix_B01_Combined_Cycle_Gas_Turbine_Unit_Cause_Codes_2023_DRI.pdfAppendix B01: Index To Combined Cycle Gas Turbine Unit Cause Codes1/1/2023
Appendix_B02_Combined_Cycle_Steam_Turbine_Unit_Cause_Codes_2023_DRI.pdfAppendix B02: Index To Combined Cycle Steam Turbine Unit Cause Codes1/1/2023
Appendix_B03_CoGenerator_Gas_Turbine_Unit_Cause_Codes_2023_DRI.pdfAppendix B03: Index To Co-generator Gas Turbine Unit Cause Codes1/1/2023
Appendix_B04_CoGenerator_Steam_Turbine_Unit_Cause_Codes_2023_DRI.pdfAppendix B04: Index To Co-generator Steam Turbine Unit Cause Codes1/1/2023
Appendix_B05_CoGenerator_Block_Unit_Cause_Codes_2023_DRI.pdfAppendix B05: Index To Co-generator Block Unit Cause Codes1/1/2023
Appendix_B06_Combined_Cycle_Block_Unit_Cause_Codes_2023_DRI.pdfAppendix B06: Index To Combined Cycle Block Unit Cause Codes1/1/2023
Appendix_B07_Fluidized_Bed_Combustion_Unit_Cause_Codes_2023_DRI.pdfAppendix B07: Index to Fluidized Bed Combustion Unit Cause Codes1/1/2023
Appendix_B08_Fossil_Steam_Unit_Cause_Codes_2023_DRI.pdfAppendix B08: Index to Fossil Steam Unit Cause Codes1/1/2023
Appendix_B09_Gas_Turbine_Jet_Engine_Unit_Cause_Codes_2023_DRI.pdfAppendix B09: Index to Gas Turbine/Jet Engine Unit Cause Codes1/1/2023
Appendix_B10_Geothermal_Unit_Cause_Codes_2023_DRI.pdfAppendix B10: Index to Geothermal Unit Cause Codes1/1/2023
Appendix_B11_Internal_Combustion_Unit_Cause_Codes_2023_DRI.pdfAppendix B11: Index to Internal Combustion/Reciprocating Engine Unit Cause Codes1/1/2023
Appendix_B12_Miscellaneous_Unit_Cause_Codes_2023_DRI.pdfAppendix B12: Index to Miscellaneous Unit Cause Codes1/1/2023
Appendix_B13_Multi_Boiler_Multi_Turbine_Unit_Cause_Codes_2023_DRI.pdfAppendix B13: Index to Multi-boiler/Multi-turbine Unit Cause Codes1/1/2023
Appendix_B14_Nuclear_Unit_Cause_Codes_2023_DRI.pdfAppendix B14: Index to Nuclear Unit Cause Codes1/1/2023
Appendix_B15_Pumped_Storage_Hydro_Unit_Cause_Codes_2023_DRI.pdfAppendix B15: Index to Pumped Storage/Hydro Unit Cause Codes1/1/2023
Appendix_C_Utility_Identification_Codes_2023_DRI.pdfAppendix C: Utility Identification Codes1/1/2023
Appendix_D_Cause_Code_Cross_Reference_2023_DRI.pdfAppendix D: Cause Code Cross Reference1/1/2023
Appendix_E_Unit_Design_Data_forms_2023_DRI.pdfAppendix E: Unit Design Data Forms1/1/2023
Appendix_E1_Fossil_Steam_2023_DRI.pdfAppendix E1: Fossil Steam1/1/2023
Appendix_E2_Fluidized_Bed_2023_DRI.pdfAppendix E2: Fluidized Bed1/1/2023
Appendix_E3_Nuclear_2023_DRI.pdfAppendix E3: Nuclear1/1/2023
Appendix_E4_Internal_Combustion_2023_DRI.pdfAppendix E4: Internal Combustion1/1/2023
Appendix_E5_Hydro_or_Pumped_Storage_2023_DRI.pdfAppendix E5: Hydro or Pumped Storage1/1/2023
Appendix_E6_Gas_Turbine_or_Jet_Engine_2023_DRI.pdfAppendix E6: Gas Turbine or Jet Engine1/1/2023
Appendix_E7_Miscellaneous_2023_DRI.pdfAppendix E7: Miscellaneous1/1/2023
Appendix_E8_CC_and_Block_2023_DRI.pdfAppendix E8: Combined Cycle Units and Block Design Data1/1/2023
Appendix_F_Equations_2023_DRI.pdfAppendix F: Performance Indexes and Equations1/1/2023
Appendix_G _Examples_and_Recommendations_2023_DRI.pdfAppendix G: Examples and Recommended Methods1/1/2023
Appendix_H_Failure_Mechanism_Codes_2023_DRI.pdfAppendix H: Failure Mechanism Codes1/1/2023
Appendix_I_Data_Release_Guidelines_2023_DRI.pdfAppendix I: GADS Data Release Guidelines1/1/2023
Appendix_J_Cause_Code_Amplification_Codes_2023_DRI.pdfAppendix J: Cause Code Amplification Codes1/1/2023
Appendix_K_Outside_Management_Control_2023_DRI.pdfAppendix K: Outside Management Control1/1/2023
Appendix_L1_Calculating_Combined_Cycle_and_Co-Generation_Block_Data_Using_Synthesis_Event_Performance_Method_2023_DRI.pdfAppendix L1: Calculating Combined Cycle and Co-generation Block Data Using the Synthesis Event and Performance Method1/1/2023
Appendix_L2_Calculating_Combined_Cycle_and_Co-Generation_Block_Data_Using_Fleet-type_Roll-up_Method_2023_DRI.pdfAppendix L2: Calculating Combined Cycle and Co-generation Block Data Using the Fleet-type Roll-up Method1/1/2023
Appendix_M_Differences_Between_NERC_And_ISO_GADS_Data_Collection_and_Uses_2023_DRI.pdfAppendix M: Differences between NERC-GADS and ISO-GADS Data Collection and Uses1/1/2023
Appendix_N_Changes_to_DRI_from_2022_to_2023_DRI.pdfAppendix N: Changes to DRI 2022 to 20231/1/2023
Hydro_GADS_2023_DRI.pdfHydro GADS1/1/2023