ICE Calculator 2: Final Report for Phase 1 and 2 of the National Initiative to Update the Interruption Cost Estimate (ICE) Calculator

Technical Report · Fri Feb 27 00:00:00 EST 2026

DOI:https://doi.org/10.2172/3021993· OSTI ID:3021993

Larsen, Peter ^[1]; Carney, Kyle ^[2]; Eto, Joseph H. ^[1]; Jiang, George ^[2]; Joshi, Dhawal ^[2]; LaCommare, Kristina S. H. ^[1]; Peterson, Ridge ^[2]; Ramee, Chris ^[2]; Smith, Anna-Elise ^[2]

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1. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
2. Resource Innovations, Inc., Half Moon Bay, CA (United States)

ICE 2.0 Phase 2 Final Report In 2021, Berkeley Lab and Resource Innovations, Inc. launched the “ICE Calculator 2 Initiative” – a national study to refresh the underlying data and enhance the functionality of the ICE Calculator. The Initiative involves Berkeley Lab contracting with sponsoring utilities to administer identical, updated and comprehensive interruption cost surveys to statistically representative samples of each utility’s customers. Berkeley Lab and Resource Innovations then pool the survey results across the utilities and use them to update the analytical engines that drive the ICE Calculator. The ICE Calculator 2 Initiative is being conducted in phases. Each phase involves the administration of interruption cost surveys to the customers of sponsoring utilities, followed by an update to the ICE Calculator based on analysis of the pooled survey results. This report describes the activities and findings from Phase 1 and 2 of the ICE Calculator 2 Initiative. Phase 1 was sponsored by eight utilities: American Electric Power, Commonwealth Edison, Dominion Energy, Duke Energy, DTE Electric, Exelon, National Grid, and Puget Sound Energy. Phase 2 was sponsored by six utilities: Empire District Electric Company, Evergy Missouri, Pacific Gas & Electric, San Diego Gas & Electric, Southern California Edison, and Union Electric. Phase 1 and 2 involved 15 customer interruption cost survey activities representing a total of 30 electricity distribution service territories. ICE Calculator Version 2.0 and 2.2 Comparison This memorandum describes–at a high-level–the improvements in interruption cost estimates for the version 2.2 of the ICE Calculator (released February 2026) compared to version 2.0 (released in April 2025). Version 2.2 of the ICE Calculator corresponds to Phase 2 of the initiative, while version 2.0 corresponds to Phase 1. The improvements in version 2.2 result from both a significant increase in the number of customer responses that have been collected and the identification of seven additional factors that help estimate customer interruption costs.

• Research Organization: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
• Sponsoring Organization: USDOE; American Electric Power; Commonwealth Edison; Dominion Energy; Duke Energy; DTE Electric; Exelon; National Grid; Pacific Gas and Electric; Puget Sound Energy; San Diego Gas & Electric; Southern California Edison; Union Electric Company, Empire District Electric Company, and Evergy Missouri
• DOE Contract Number: AC02-05CH11231
• Other Award/Contract Number: AWD00005921; AWD00005868; AWD00005819; AWD00005788; AWD00005795; AWD00006036; AWD00006334; AWD00007367; AWD00006534; AWD00007526; AWD00007617; AWD00007259
• OSTI ID: 3021993
• Country of Publication: United States
• Language: English