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EX - 99.1 2 ex991.htm NEWS RELEASE DATED FEBRUARY 22 , 2021 Exhibit 99.1 NexGen Energy Ltd. NexGen Announces Elite Environmental and Economic Results from the Rook | Feasibility Study VANCOUVER , BC , Feb. 22 , 2021 / CNW / - NexGen Energy Ltd. ( " NexGen " or the " Company " ) ( TSX : NXE ) ( NYSE : NXE ) is pleased to announce the positive results of an independent Feasibility Study ( " FS " or the " Study " ) , Mineral Reserve and Mineral Resource update of the basement - hosted Arrow Deposit , located on the Company's 100 % owned Rook I project ( " Arrow " or the " Project " ) in the Athabasca Basin in Saskatchewan , Canada . The FS was completed jointly by leading consultants including : Stantec Consulting Limited ( " Stantec " ) , Wood Canada Limited . ( " Wood " ) , and Roscoe Postle Associates Inc. ( " RPA " , now part of SLR Consulting ( Canada ) Ltd ) , with other technical inputs completed by sub - consultants . Leigh Curyer , Chief Executive Officer , commented : " The environmental and economic results from the Rook I Feasibility Study place the Project as one of the leading global resource projects with an elite ESG profile . Today's delivery of the Feasibility Study is a significant milestone which transitions NexGen into the next key stage of advancement . The results will be included in the Environmental Assessment and Licensing processes which incorporates engagement , consultation , monitoring and data collection since 2013 . The NexGen team's commitment to elite standards is evident throughout all aspects of the feasibility study , and the organization as a whole . With a minimal physical and carbon footprint , NexGen is uniquely positioned to become a world leader in the production of clean energy fuel . The global energy matrix is undertaking an enormous shift that will rely heavily on nuclear energy to deliver the decarbonization commitment for today's and future generations . It is proven to be a safe , clean and most reliably efficient form of power generation known to humankind . With all major countries signalling significant infrastructure spending , and re - prioritizing green energy policy as their major focus over this coming decade and beyond , Rook I will be a material component in the delivery of those global objectives .