2024 Constellation Sustainability Report Sustainability Data Index & Factsheet
Sustainability Data Index & Factsheet
Constellation's 2024 Sustainability Data Index & Factsheet discloses our performance and relevant policies for key sustainability topics. Metrics reflect company-wide data and are reported based on calendar year, unless otherwise indicated. Additional context is provided in our 2024 Sustainability Reportand Reporting Frameworks Content Index.
Please Note: The abbreviation "N/A" refers to metrics that are not applicable to Constellation, while the abbreviation "N/R" refers to 2022 metrics that were not reported in last year's Sustainability Report.
KEY LINKS
Constellation Code of Business Conduct
Constellation Supplier Code of Conduct
Constellation 2022 Form 10-k
Constellation 2023 Proxy Statement
Constellation 2024 Sustainability Report
The Constellation 2024 Sustainability Report details our strategies, goals and initiatives to address key sustainability issues across our entire operations and value chain. Unless otherwise noted, this report reflects our performance and progress for the period of January 1, 2023, to December 31, 2023.
Reporting Frameworks Content Index
Our Reporting Frameworks Content Index outlines how our existing disclosures align with the 2021 GRI Standards and the recommended metrics for the SASB Electric Utilities and Power Generators Standard.
External GHG Emissions Inventory Assurance Statement
Our External GHG Emissions Inventory Assurance Statement Provides verification of our Scope 1, 2 and 3 GHG emissions.
SUSTAINABILITY REPORT 2024 | 1 |
General
Financial Performance
Unit
2022
2023
GRI/SASB Indicator
Additional Information
Operating revenues | Million USD | $24,440 | $24,918 |
Net revenues | Million USD | $495 | $1,610 |
GRI 201-1
Market Information
Unit
2022
2023
GRI/SASB Indicator
Additional Information
Total customers served (annual average) | Number | 1,732,657 | 1,984,408 |
Residential | Number | 1,177,006 | 1,392,245 |
Commercial | Number | 546,133 | 583,352 |
Industrial | Number | 9,518 | 8,811 |
SASB IF-EU-000.A
Customer counts are for power customers only.
Energy Generation, Capacity, and Sales
Unit
2022
2023
GRI/SASB Indicator
Additional Information
Total electricity generated | GWh | 198,949 | 200,785 |
Nuclear | GWh | 173,350 | 174,047 |
Share of Constellation generation | Percent | 87% | 87% |
Natural gas and oil | GWh | 21,563 | 22,959 |
Share of Constellation generation | Percent | 11% | 11% |
Renewables and storage | GWh | 4,036 | 3,779 |
Share of Constellation generation | Percent | 2% | 2% |
Share of Constellation electricity generated in | Percent | 3.1% | 2.2% |
regulated markets | |||
SASB IF-EU-000.D
Please refer to the Sales and Supply Sources section in Constellation's 2023 Form10-Kfor additional details on 2023 and 2022 data.
This data index shows net generation gigawatt hours (GWh) calculated based on Constellation's ownership level of generation assets according to the equity share boundary approach, as defined by the GHG Protocol. The generation table in Constellation's 2023 Form10-Kshows our ownership of consolidated generating facilities at 100% to be consistent with the income statement presentation.
SUSTAINABILITY REPORT 2024 | 2 |
Energy Generation, Capacity, and Sales
Unit
2022
2023
GRI/SASB Indicator
Additional Information
Total owned generating capacity | MW | 32,355 | 33,094 | ||
Nuclear | MW | 20,895 | 22,070 | Increase in capacity due to acquisition of ownership stake in South Texas Project Electric Generating | |
Station (STP). | |||||
Share of total Constellation owned generating | Percent | 65% | 67% | ||
capacity | |||||
Nuclear fleet capacity factor | Percent | 94.8% | 94.4% | Capacity factor refers to the ratio of electrical energy produced by our nuclear generating fleet for a | |
period of time compared to the electrical energy that could have been produced at continuous full | |||||
power operation during the same period. | |||||
Data reflects the capacity factor for nuclear facilities operated by Constellation. | |||||
Natural gas and oil | MW | 8,807 | 8,461 | ||
Share of total Constellation owned generating | Percent | 27% | 25% | ||
capacity | |||||
Renewables and storage | MW | 2,653 | 2,563 | Decrease in reported net capacity in 2023 reflects implementation of the Resource Adequacy Planning | |
Effective Load Carrying Capability (ELCC) program in the PJM region, which reserves a percentage of | |||||
Share of total Constellation owned generating | Percent | 8% | 8% | the nameplate capacity of our hydroelectric units. | |
capacity | |||||
Total electricity delivered to customers | MW | 201,914,320 | 197,989,177 | SASB IF-EU-000.B | |
Residential customers | MWh | 12,110,749 | 11,797,826 | ||
Commercial customers | MWh | 103,830,270 | 104,493,054 | ||
Industrial customers | MWh | 19,200,571 | 18,802,190 | ||
All other retail customers | MWh | 544,522 | 434,298 | ||
Wholesale customers | MWh | 66,228,208 | 62,461,809 | ||
Wholesale electricity purchased for customers | TWh | 70.7 | 67.2 | SASB IF-EU-000.E | |
Natural gas purchased for customers | MMBtu | 1,131,174,557 | 1,173,405,651 | ||
SUSTAINABILITY REPORT 2024 | 3 |
Climate and Environmental Management
GRI/SASB Indicator
Board level responsibility for climate and | The Constellation Board of Directors provides oversight on the development and execution of our corporate citizenship strategy, including | GRI 2-9 |
environmental issues | sustainability and environmental stewardship. The Corporate Governance Committee of the Board reviews our environmental strategies, including | GRI 2-12 |
climate and sustainability policies. This oversight includes issues such as water, biodiversity, air emissions and operational waste. The Nuclear | ||
Oversight Committee oversees the safe and reliable management and operation of our nuclear generating facilities and reviews environmental, health | GRI 2-13 | |
and safety issues relating to nuclear generating facilities, including the safe management of spent nuclear fuel. For more information, please see our | ||
2024 Proxy Statement,relevant committee chartersand2024 Sustainability Report. | ||
Executive level responsibility for climate and | The Constellation Sustainability Council is overseen by the Vice President of Sustainability and Climate Strategy and consists of a cross-functional | GRI 2-9 |
environmental issues | group of executive leaders from key departments across Constellation. The Council meets four times per year to review sustainability policies and | |
initiatives, ensure strategic alignment, discuss emerging ESG trends and make informed suggestions to management. | ||
Additionally, our executive team, including our CEO and other senior management, is accountable for our environmental compliance and assurance | ||
strategy. At Constellation, we are committed to protecting and sustaining the environment by complying with applicable regulatory requirements while | ||
protecting and enhancing the air, water and land. Constellation's Environmental Council oversees our program and is composed of leaders from each | ||
business unit. The Council is subject to oversight from the Board of Directors and meets four times per year to review policies and initiatives, ensure | ||
strategic alignment, discuss emerging environmental trends and make informed suggestions to senior executive leadership. | ||
For more information, please see our 2024 Sustainability Report. | ||
Relevant policies and resources | Corporate Governance Committee Charter | |
Nuclear Oversight Committee Charter | ||
Climate Change Policy | ||
Environmental Policy | ||
Water Resource Management Policy | ||
Biodiversity Policy | ||
Environmental Justice Policy | ||
Environmental Stewardship & Impact webpage | ||
Nuclear EMS Certification Statement | ||
SUSTAINABILITY REPORT 2024 | 4 |
Energy/Fuel Consumption
Unit
2022
2023
GRI/SASB Indicator
Additional Information
Total energy/fuel consumed | GWh | 48,098 | 51,727 | GRI 302-1 | Per CDP guidance, this data excludes nuclear fuel. |
2022 data throughout the Climate section of this Data Index may differ from previously disclosed | |||||
Total non-renewable energy/fuel | GWh | 47,144 | 50,768 | ||
amounts due to re-baselining, as discussed in more detail below in the Greenhouse Gas Emissions | |||||
section of this Data Index. | |||||
Total renewable energy/fuel | GWh | 43 | 43 | ||
Total purchased electricity | GWh | 911 | 916 | ||
Percentage of energy consumed from the grid | Percent | 1.9% | 1.8% | ||
Energy consumption intensity | GWh / million USD | 1.97 | 2.08 | GRI 302-3 | |
revenue | |||||
Customer Energy Savings | Unit | 2022 | 2023 | GRI/SASB Indicator | Additional Information |
Reductions in energy requirements of sold products | MWh | 571,307 | 511,306 | GRI 302-5 | This data only includes energy savings realized through customer energy efficiency projects |
and services achieved during the reporting period | SASB IF-EU-420a.3 | implemented byConstellation Energy Solutions. | |||
SUSTAINABILITY REPORT 2024 | 5 |
Greenhouse Gas Emissions | Unit | 2022 | 2023 | GRI/SASB Indicator | Additional Information |
Scope 1 GHG emissions | Metric tons CO2e | 9,102,084 | 9,679,181 | GRI 305-1 | Gases included in the calculation include CO2, CH4, N2O, HFCs, PFCs and SF6. Constellation calculates |
SASB IF-EU-110a.1 | Gases included in the calculation include CO2, CH4, N2O, HFCs, PFCs and SF6. Constellation calculates | ||||
Scope 1 emissions using guidance from the IPCC 4th Assessment Report. | |||||
The increase to our Scope 1 emissions in 2023 is the result of our natural gas generation assets in | |||||
Texas being called on more frequently and for longer durations than in prior years to ensure the reliable | |||||
delivery of power to meet the demand of that state's electricity grid | |||||
Per GHG Protocol guidance, the GHG "inventory boundary must be held consistent between those data | |||||
sets that are used for a direct comparison over time." Following this, we have conducted a re-baselining | |||||
of our GHG inventory to ensure comparison of "like with like" emissions boundaries and calculation | |||||
methodologies over time. Re-baselining was triggered after exceeding our 5% re-baselining threshold | |||||
due to (1) changes in our organizational structure due to acquisition and divestment, (2) improvements | |||||
to our GHG accounting methodology for better alignment to GHG Protocol guidance, and (3) updated, | |||||
more accurate source data from which our GHG emissions are calculated. As such, our 2022 GHG | |||||
emissions have been updated to reflect these changes and may vary slightly from what was previously | |||||
reported. | |||||
Scope 1 biogenic CO2 emissions | Metric tons CO2e | 12 | 13 | GRI 305-1 | This represents CO2 emissions from the combustion or biodegradation of biomass. |
Percentage of Scope 1 emissions covered under | Percent | 8.5% | 6.4% | SASB IF-EU-110a.1 | |
emissions-limiting regulations | |||||
Percentage of Scope 1 emissions covered under | Percent | 99.4% | 99.4% | ||
emissions-reporting regulations | |||||
SUSTAINABILITY REPORT 2024 | 6 |
Greenhouse Gas Emissions | Unit | 2022 | 2023 | GRI/SASB Indicator | Additional Information |
Scope 2 (location-based) GHG emissions | Metric tons CO2e | 298,226 | 292,891 | GRI 305-2 | Gases included in the calculation include CO2, CH4, N2O, HFCs, PFCs, SF6 and NF3, but only CO2, CH4 and |
N2O are relevant to our operations. Constellation calculates Scope 2 emissions using guidance from the | |||||
IPCC 4th Assessment Report. | |||||
Scope 2 (market-based) GHG emissions | Metric tons CO2e | 362,974 | 379,850 | GRI 305-2 | Our Scope 2 market-based emissions are higher compared to our Scope 2 location-based emissions |
due to the use of residual mix emission factors, in line with GHG Protocol Scope 2 guidance Table 6.3 | |||||
Market-based Scope 2 data hierarchy examples. Voluntary and compliance purchases of clean energy | |||||
are removed from the energy mix (the denominator for residual mix emission factor) to more accurately | |||||
reflect emissions associated with a buyer's purchases and avoid double counting of clean energy | |||||
attributes. | |||||
Historically, we have taken an annual energy matching approach to reducing our market-based Scope | |||||
2 emissions by retiring emission-free energy certificates (EFECs) from nuclear generation to cover 100 | |||||
percent of our annual grid-supplied electric use in the PJM market territory, as was the practice prior to | |||||
our separation from Exelon in 2022. As part of our climate roadmap work in 2023, we reassessed our | |||||
approach to using contractual instruments like EFECs to reduce our market-based Scope 2 inventory. | |||||
We determined we needed a change to align our clean energy procurement strategy with what we | |||||
believe is required for firm, reliable grid decarbonization: hourly carbon-free energy matching of load | |||||
with supply within geographically deliverable boundaries. As part of this pivot, we re-baselined our | |||||
historic market-based Scope 2 inventories and are using this year to reset, without any procurement | |||||
of contractual instruments against our 2023 inventory, while we turn our ambitions toward making | |||||
progress on hourly matching against our own electricity use in our 2024 market-based Scope 2 | |||||
inventory and beyond. | |||||
Had we continued the historic practice of retiring EFECs to cover 100 percent of our annual grid- | |||||
supplied electric use in the PJM market territory, our Scope 2 market-based emissions would have | |||||
increased by 13.4 percent in 2023 compared to 2022, from approximately 46,000 to 53,000 metric tons | |||||
of CO2e. | |||||
Total Scope 1 and 2 (location-based) GHG emissions | Metric tons CO2e | 9,400,309 | 9,972,072 | ||
Total Scope 1 and 2 (market-based) GHG emissons | Metric tons CO2e | 9,465,058 | 10,059,031 | ||
GHG emissions intensity (Scope 1 and 2, | Metric tons CO2e / | 385 | 400 | GRI 305-4 | |
location-based) | million USD revenue | ||||
GHG emissions intensity (Scope 1 and 2, | Metric tons CO2e / | 387 | 404 | ||
market-based) | million USD revenue | ||||
SUSTAINABILITY REPORT 2024 | 7 |
Greenhouse Gas Emissions | Unit | 2022 | 2023 | GRI/SASB Indicator | Additional Information |
Total relevant Scope 3 GHG emissions | Metric tons CO2e | 81,398,873 | 87,482,855 | GRI 305-3 | Gases included in the calculation include CO2, CH4, N2O, HFCs, PFCs and SF6. Constellation calculates |
Scope 3 emissions using guidance from the IPCC 4th Assessment Report. There are 17 potential Scope | |||||
3 categories. Constellation currently tracks and reports those most pertinent to our business and where | |||||
we can most effectively take action today. Additional information on Scope 3 accounting can be found at | |||||
http://ghgprotocol.org/scope-3-technical-calculation-guidance. | |||||
Category 3 Fuel- and Energy-related:Long-term | Metric tons CO2e | 21,050,841 | 24,922,161 | Includes owned and Power Purchase Agreement (PPA) renewables for which attributes may have been | |
and spot market power purchases for resale -- fossil | sold as RECs or retired for Renewable Portfolio Standards (RPS) obligations. | ||||
Category 11 Use of Sold Products: Natural gas | Metric tons CO2e | 60,079,112 | 62,322,096 | ||
sold by Constellation New Energy (as used by | |||||
customers) | |||||
Category 11 Use of Sold Products: Heating and | Metric tons CO2e | 259,284 | 226,578 | ||
cooling equipment operated for others | |||||
Category 6 Business travel | Metric tons CO2e | 3,261 | 5,817 | ||
Category 8 Upstream Leased Activities: Fuel and | Metric tons CO2e | 6,376 | 6,203 | ||
energy used in leased facilities and equipment | |||||
GHG Emissions Reductions/Avoidance | Unit | 2022 | 2023 | GRI/SASB Indicator | Additional Information |
Total avoided carbon emissions from carbon-free | Metric tons CO2e | 124,235,613 | 124,553,213 | Estimated based on 178 TWhs of zero-emissions electricity generated by our nuclear and renewable | |
generation assets | fleet during 2023, using the U.S. Environmental Protection Agency's (EPA) GHG Equivalencies | ||||
Calculator. | |||||
Avoided carbon emissions - nuclear generation | Metric tons CO2e | 121,099,805 | 121,587,152 | ||
Avoided carbon emissions - renewable generation | Metric tons CO2e | 3,135,807 | 2,966,061 | ||
GHG emissions reduced as a direct result of | Metric tons CO2e | 243,749 | 227,898 | GRI 305-5 | This data only includes GHG emissions avoided as a result of customer energy efficiency projects |
reduction initiatives | implemented byConstellation Energy Solutions. | ||||
SUSTAINABILITY REPORT 2024 | 8 |
Other Significant Air Emissions | Unit | 2022 | 2023 | GRI/SASB Indicator | Additional Information |
Nitrogen oxide (NOx) emissions | Metric tons | 938 | 804 | GRI 305-7 | In 2023, our measured emissions intensity rates, on a per MWh |
SASB IF-EU-120a.1 | generated basis, for NOx and SOx were well below the U.S. electric generation industry average, and we | ||||
NOx emissions intensity | kg/MWh generated | 0.005 | 0.004 | ||
have lowered our NOx and SOx emission rates each by 46 and 71 percent, respectively since 2019. For | |||||
Sulfur oxide (SOx) emissions | Metric tons | 118 | 53 | more information, please see the most recent Benchmarking Air Emissions Report, published November | |
2023. | |||||
SOx emissions intensity | kg/MWh generated | 0.0006 | 0.0003 | ||
Particulate matter (PM), lead (Pb), mercury (Hg), | Metric tons | N/A | N/A | ||
volatile organic compounds (VOCs), persistent organic | |||||
pollutants (POP) and hazardous air pollutants (HAP) | |||||
emissions | |||||
Ozone-depleting substances (ODS) emissions | Metric tons of CFC-11 | 3.76 | 1.59 | GRI 305-6 | |
equivalent | |||||
Environmental Compliance | Unit | 2022 | 2023 | GRI/SASB Indicator | Additional Information |
Percentage of generation operations covered under an | Percent | 100% | 100% | Refer to Constellation 2024 Sustainability Report: Managing Environmental Programs section for | |
environmental management system (EMS) | additional details. | ||||
Total permit non-compliances | Number | 12 | 16 | GRI 2-27 | |
Air | Number | 6 | 4 | ||
Land | Number | 0 | 1 | ||
Water | Number | 6 | 11 | SASB IF-EU-140a.2 | |
Total notice of violations | Number | 0 | 0 | GRI 2-27 | |
SASB IF-EU-140a.2 | |||||
Air | Number | 0 | 0 | ||
Land | Number | 0 | 0 | ||
Water | Number | 0 | 0 | ||
Total monetary value of significant fines | Million USD | 0 | 0 | GRI 2-27 | |
Total reportable spills | Number | 0 | 2 | Only spills that exceed federal reportable quantities for ground or water are disclosed here. | |
SUSTAINABILITY REPORT 2024 | 9 |
Water | Unit | 2022 | 2023 | GRI/SASB Indicator | Additional Information | ||
Total water withdrawal/intake | Megaliters | 46,682,483 | 48,697,737 | GRI 303-3 | |||
SASB IF-EU-140a.1 | |||||||
Share of withdrawn water returned to source | Percent | 98.5% | 98.5% | ||||
Total water discharge | Megaliters | 45,974,591 | 47,960,046 | GRI 303-4 | |||
Total water consumption | Megaliters | 707,892 | 737,692 | GRI 303-5 | |||
SASB IF-EU-140a.1 | |||||||
Total water consumed in areas with water stress | Megaliters | Negligible | Negligible | We use the World Resources Institute Aqueducttool to broaden our understanding of potential future | |||
water scarcity risks caused by climate change and economic growth and how our operations may be | |||||||
impacted or may pose impacts in these scenarios. Constellation's largest water-consuming sites are in | |||||||
low-medium-risk regions, while our operations in high-water-risk areas use negligible amounts of water | |||||||
and do not face water scarcity risks. | |||||||
Total water recycled through closed cycle cooling | Megaliters | 7,003,852 | 6,649,680 | ||||
systems | |||||||
Biodiversity | Unit | 2022 | 2023 | GRI/SASB Indicator | Additional Information | ||
Site biodiversity programs certified | by the Wildlife | Number | 14 | 15 | GRI 304-3 | For more information on our WHC-certified programs, please visit WHC's websiteand select | |
Habitat Council (WHC) | "Constellation" from the "Company/Organization" drop-down menu. | ||||||
Site biodiversity programs certified | by the National | Number | 14 | 14 | |||
Wildlife Federation (NWF) | |||||||
Waste | Unit | 2022 | 2023 | GRI/SASB Indicator | Additional Information | ||
Total hazardous waste generated | Metric tons | GRI 306-3 | 2022 values have been revised from those previously reported in last year's report, which included | ||||
26 | 42 | ||||||
universal waste, a specially-regulated subset of hazardous waste that includes batteries, mercury- | |||||||
Hazardous waste diverted from disposal | Metric tons | <1 | 1 | GRI 306-4 | |||
containing lamp bulbs, etc., as defined by U.S. EPA regulations. The updated values reported in this | |||||||
year's report exclude universal waste. | |||||||
Total radioactive waste disposed | Cubic meters | 1,393 | 1,849 | For additional context on how we safely manage nuclear waste, please see the Managing Our Waste | |||
Responsibly section of our 2024 Sustainability Report. | |||||||
SUSTAINABILITY REPORT 2024 | 10 |
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Constellation Energy Corporation published this content on 25 June 2024 and is solely responsible for the information contained therein. Distributed by Public, unedited and unaltered, on 25 June 2024 01:11:05 UTC.