The ratio of epithermal to thermal neutrons is proportional to uranium, allowing the U 3O 8 ore grade to be accurately calculated. Therefore, the neutrons emitted by the PFN tool excite, at an atomic level, in-situ uranium atoms in the drill hole, creating fast (epithermal) neutrons and slow (thermal) neutrons. The PFN tool creates very fast neutrons (14MeV) and fires 10 8 neutrons per second. Real-time PFN analysis accurately eliminates potential errors by using neutron activation to directly detect and quantify uranium content in place down the drill hole. Without accurate uranium values, the potential for inaccurate estimates of mineralization on both the high and low side is ever present. Traditionally, accurate uranium values are therefore determined by chemical assay of drill core which is time consuming and expensive. Many uranium deposits have a degree of disequilibrium, whereby the radioactivity measured in drill holes using traditional gamma methods does not accurately correspond to ore grade, due to the continued decay of uranium daughter products including potassium, thorium, lead and bismuth relative to radium (Ra 226), a significant gamma emitter. The Company owns and operates 2 logging trucks and 5 PFN tools. Any anomalous gamma readings are followed up with Prompt Fission Neutron (PFN) surveys which provide direct and accurate in-situ uranium values eliminating any concerns over disequilibrium. Each hole is logged with electrical and gamma methods upon completion. The Rosita Plant is designed to process uranium feed from multiple satellite operations, all located in the South Texas area, and is 1 of 11 licensed and constructed uranium processing plants in the United States, 2 of which are owned by enCore Energy.Īll drill holes are 5.625-inch diameter rotary-mud holes. We remain on budget and the delay is not expected to impact scheduled production startup in 2023. The final stage of refurbishment work will be completed with the delivery of six pumps that have been delayed due to unexpected supply chain interruptions. Rosita Central Uranium Processing Plant (Rosita Plant)ĮnCore's Rosita Plant, located approximately 60 miles from Corpus Christi, Texas, is a licensed, past-producing in-situ recovery (ISR) uranium plant that is completing refurbishment. 02% U 3O 8 cutoff) multiplied by the thickness of the mineralization at or above the cutoff value. **Grade Thickness, or GT, is defined as the product of the mineral grade (at the. The water table is located approximately 95 to 115 feet below surface. The Company has identified three saturated (required for ISR), mineralized sandstone horizons within the Goliad Formation lying approximately 210 to 245 feet below the surface. *All intercepts are located in the Rosita PAA which hosts mineralization within the Pliocene aged Goliad Formation. enCore remains on budget and on schedule to meet its 2023 operational plans and contract delivery commitments.' We look forward to additional drilling results as we advance the project into development. Paul Goranson, enCore Energy Chief Executive Officer said, 'enCore continues to be pleased with the drill results in terms of both grade and extent of mineralization at our Rosita Extension area. Please visit to view Rosita project maps and view the Rosita drill program video at. The Company has expanded the drill program to four drill rigs on site.

High-grade mineralization was encountered in 8 holes which have a GT of 0.85 to 1.73 ĭelineation drill results have established three distinct mineralized horizons in the sandstone host rock as opposed to only one that was previously identified within the PAA A GT of 0.3 is the established minimum for inclusion in a wellfield for shallow ISR, with 0.45 considered typical ISR ore-grade for shallow deposits

Significant mineralization in 59 of 145 holes with Grade Thickness (GT) above 0.3 encountered in 37 holes ('GT' or 'Grade Thickness' is defined as the grade multiplied by the thickness of a mineralized intercept).

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