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    Boss overhauls Honeymoon project: design and capex implications for ISR engineers

    December 18, 2025|

    Reviewed by Tom Sullivan

    Boss overhauls Honeymoon project: design and capex implications for ISR engineers

    First reported on Australian Mining

    30 Second Briefing

    Boss Energy has withdrawn its 2021 enhanced feasibility study for the Honeymoon in-situ recovery uranium project in South Australia and is preparing a fully updated development plan. The original EFS was based on restarting the mothballed plant and wellfields using legacy infrastructure, but recent drilling, higher uranium prices and changed cost assumptions have made those parameters obsolete. An overhaul of process design, production schedule and capital estimates is likely, with implications for wellfield layout, resin-in-pulp or ion-exchange circuit selection, and long-term groundwater management.

    Technical Brief

    • For other ISR uranium projects, Honeymoon’s reset underlines how quickly feasibility inputs can be invalidated by market and drilling changes.

    Our Take

    Uranium features in only several keyword-matched pieces in our database compared with hundreds of broader Mining items, so Boss Energy’s Honeymoon work in South Australia sits in a relatively niche but closely watched segment of project coverage.

    With the 2021 enhanced feasibility study now withdrawn, Honeymoon effectively re-sets its technical and economic baseline, which typically signals either a material change in uranium market assumptions or a shift in preferred processing/production configuration.

    South Australia appears frequently in our Projects-tagged mining coverage, and uranium developments there like Honeymoon tend to face more mature regulatory frameworks than greenfield jurisdictions, which can streamline approvals but tighten expectations on environmental performance and rehabilitation planning.

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    Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.

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