Background
NexGen Energy sought to develop the Rook-1 uranium mine and mill project at Patterson Lake in Northern Saskatchewan. In February 2019, NexGen applied to the Canadian Nuclear Safety Commission (CNSC) for a license to prepare the site and construct the facility. The Nuclear Safety and Control Act prohibits site preparation or construction of nuclear facilities without CNSC authorization.
Beginning in November 2023, NexGen conducted “design confirmation drilling” on two large pads at the proposed site, creating circular arrays of cased drill holes filled with brine solution. NexGen characterized this work as temporary, exploratory activity exempt from licensing under provincial exploration permits. However, in October 2024, CNSC staff learned during an investor call that NexGen executives referred to “shaft pads” and “freeze-rings” ready pending approvals. Further investigation revealed the drill holes matched exactly the specifications and locations of freeze-ring infrastructure described in NexGen’s own license application—infrastructure necessary for shaft construction.
In December 2024, the CNSC issued a Notice of Violation and $29,080 administrative monetary penalty, alleging NexGen had conducted site preparation without authorization. NexGen requested a review, and in May 2025 the CNSC upheld the violation but reduced the penalty to $11,920, acknowledging regulatory ambiguity regarding the boundary between exploration and site preparation. NexGen now challenges this decision by judicial review and has filed a motion to compel disclosure of tribunal materials allegedly withheld from the Certified Tribunal Record.
The Court’s Holding
Justice Roy addressed NexGen’s motion to compel the CNSC to disclose additional materials not included in the Certified Tribunal Record. The decision sets forth the legal framework governing tribunal record disclosure under Federal Courts Rules 317 and 318, examining the tension between ensuring meaningful judicial review and preventing improper “fishing expeditions” or discovery proceedings.
The court traced the CNSC’s substantive reasoning: the design confirmation drilling constituted site preparation rather than exploration because (1) the drill holes matched exactly in number and location NexGen’s freeze-ring design submitted in its license application; (2) the holes were cased and preserved with brine, inconsistent with standard exploratory decommissioning; (3) signage at the pads indicated “Production site”; and (4) NexGen had no intention of decommissioning the holes. The CNSC panel acknowledged lack of clarity in regulatory guidance distinguishing site preparation from exploration but found the violation established on the balance of probabilities. The penalty reduction to $11,920 reflected extenuating circumstances related to regulatory ambiguity and communication failures between NexGen and CNSC staff.
NexGen seeks disclosure of correspondence between the designated officer and review panel, communications with third parties regarding the alleged violation, missing attachments, and documents referenced in submissions. The CNSC resists, arguing the Certified Tribunal Record contains all materials actually before the decision-maker and that rule 317 does not permit discovery. The decision establishes the legal tests governing what must be disclosed but the ruling on the specific motion appears incomplete in the text provided.
Key Takeaways
- Exploratory drilling can constitute licensable site preparation based on its specifications, preservation method, and alignment with final construction design, even if labeled exploratory by the applicant.
- Regulatory agencies may enforce strict licensing requirements when applicants conduct activities matching their own submitted design specifications, regardless of stated intent.
- The CNSC acknowledged substantial ambiguity in current regulatory guidance distinguishing site preparation from exploration for uranium mines, creating fairness considerations in enforcement.
- Communication and transparency between applicants and regulators is critical; undisclosed design connections or preservation plans can transform exploratory activities into regulatory violations.
Why It Matters
For uranium mining applicants and their counsel, this decision reinforces that CNSC licensing requirements apply strictly to activities that factually constitute site preparation, regardless of characterization. The decision illustrates regulatory risk in conducting design-related drilling without explicit CNSC pre-approval and full disclosure of how the data will be used. NexGen’s experience shows that “exploratory” work that matches the applicant’s own engineering specifications for construction will be recharacterized as site preparation, triggering licensing and penalty exposure.
For administrative law, the decision addresses the scope of tribunal record disclosure in judicial review, balancing the principle that meaningful review requires a complete record against the principle that rule 317 disclosure is not equivalent to discovery. The CNSC’s own acknowledgment of regulatory ambiguity and communication failure introduces fairness considerations that may influence both the disclosure motion outcome and the substantive judicial review of whether the violation was reasonable.