Phoenix ISR (Wheeler River) Feasibility Study: C$1.57B NPV, 73% IRR
Denison Mines Corp.'s Phoenix ISR (Wheeler River) in Athabasca Basin, Northern Saskatchewan, Canada has a Feasibility Study outlining an after-tax NPV of C$1.57B, an after-tax IRR of 73%, and initial capital of C$600M. The proposed mine plan runs 10 years.
Denison Mines Corp.'s Phoenix ISR (Wheeler River) has reported Feasibility Study results for the uranium (u3o8) project in Athabasca Basin, Northern Saskatchewan, Canada. The study headlines an after-tax net present value of C$1.57B at a 8% discount rate. It reflects Denison Mines Corp.'s (DML.TO) latest disclosed economics for the asset.
Economics. The after-tax NPV is C$1.57B using a 8% discount rate. After-tax IRR is 73%. Initial capital expenditure is estimated at C$600M. The study models a payback period of 1 years. All-in sustaining costs are pegged at 18.41 USD/lb U3O8. Economics are based on US$68.89-US$78.36 /lb U3O8 (base case); also quoted at US$100/lb case.
Production and mine plan. The project envisions an isr (in-situ recovery) operation. Life of mine is 10 years. Average head grade is 11.4% U3O8 (M&I resources); 46.0% U3O8 Zone A high-grade domain.
Resources and ownership. The company holds a 95% interest in the project.
These figures are extracted from Denison Mines Corp.'s technical disclosures and reflect the most recent Feasibility Study on file. Compare this project against other developers and producers in our project economics database, and always verify the numbers against the original technical report before making any investment decision.
Reserves & Resources
| Category | Tonnage | Grade | Contained |
|---|---|---|---|
| Proven & Probable | 219,000 tonnes | 11.7% U3O8 | 56.7 million lbs U3O8 |
| Category | Tonnage | Grade | Contained |
|---|---|---|---|
| Measured & Indicated | 280,200 tonnes | 11.4% U3O8 | 70.6M lbs U3O8 |
| Measured & Indicated (Zone A) | — | 46.0% U3O8 | 56.3M lbs U3O8 |
Our Analysis
- IRR after-tax
- 73%
higher than 90% of 335 projects we track
- NPV after-tax
- C$1.57B
higher than 80% of 433 projects we track
- Initial capex
- C$600M
38% of NPV
costlier than 70% of 433 projects we track
- Payback
- 1yrs
slower than 10% of 270 projects we track
- Mine life
- 10yrs
- Discount rate
- 8%
- Study price assumption
- US$68.89-US$78.36 /lb U3O8 (base case); also quoted at US$100/lb case
The outlier here is the combination of a 73% after-tax IRR and a C$600M build cost, a pairing that screens in the top decile of the 335 projects we track. Payback of one year and an NPV of C$1.57B, ranking above 80% of peers, reinforce the picture. The capital-light profile is the real story: the build cost is roughly a tenth of the company's US$3.18B market cap, which means funding risk is minimal for a mid-cap with a 12-project portfolio. This is not a story of a stretched balance sheet chasing a transformative build.
The catch is scale and grade risk, not financing. A 10-year mine life is short for a uranium asset, and the economics hinge on a price band of US$68.89-US$78.36/lb U3O8, with a US$100/lb case quoted as upside. The feasibility study stage is the saving grace: this is a build-ready estimate with a typical plus or minus 15% band, so the returns have earned more confidence than a scoping-level PEA would merit. The Athabasca Basin jurisdiction is a quality signal, though the project is already in construction, which shifts the risk from permitting to execution.
The NPV at roughly 0.4x market cap cuts two ways. Either the market is not crediting the full value of a construction-stage asset, or it is discounting the short mine life and commodity price sensitivity. The one question that decides whether this works: can the operator sustain the grade and throughput assumptions through the early years of production, because a one-year payback leaves little margin for error if the deposit underperforms its feasibility model.
Our take, benchmarked against the project economics in the Mining Stocks database. Figures are estimates drawn from company technical reports — not investment advice; always verify against the source filing.