Nova Scotia Power responds to NSEB information requests on vendor defect and cost responsibility in Dispatch Study implementation

M12919 · Nova Scotia Power Dispatch Study Action Plan – Quarterly Update – Q2 2026

AI summary

IRs 2–6 address a software defect identified during User Acceptance Testing (UAT) of the Dispatch Study solution, in which vendor Hitachi misinterpreted the design requirement for 'daily' maximum energy — configuring the model against a calendar day rather than a rolling 24-hour day, causing the model to fail to identify a balance-of-day MW amount for generation assets including Wreck Cove and Tufts Cove.
NS Power asserts that identification and remediation of defects during UAT falls within the project's capital budget as standard industry practice; the vendor 'corrected and reperformed' the development work without additional cost passed to NS Power (IR-3, IR-4).
In response to IR-5, NS Power confirms that communications with Hitachi were primarily verbal during on-site UAT sessions; the UAT Issue Tracking Log (Defect ID: In010, Priority: Critical, Status: Fixed) serves as the primary written record of the defect.
NS Power maintains (IR-6) that its design requirements were clear, citing specific documented requirements (H2, H3) mandating daily max energy acceptance for Tufts Cove and Wreck Cove, and declines to pursue vendor cost recovery on the basis that remediation was within project scope.

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What was filed

Documents filed on this day

N-3 NSPI (NSEB) RIRs 2-6 exhibits