Cameco : 2024 Inkai Technical Report

CCJ

Inkai Operation

Turkestan Region, Republic

of Kazakhstan

National Instrument 43-101

Technical Report

Effective Date: September 30, 2024

Date of Technical Report: November 12, 2024

PREPARED FOR CAMECO CORPORATION BY:

C. SCOTT BISHOP, P.ENG.

SERGEY IVANOV, P.GEO.

ALAIN D. RENAUD, P.GEO.

Table of Contents

1

Summary

1

1.1

Operation overview

1

1.2

Property tenure

1

1.3

Location and existing infrastructure

2

1.4

Geology and mineralization

2

1.5

Exploration and delineation

3

1.6

MPP, Sat1 and Sat2 area development

4

1.7

Mineral resources and mineral reserves

4

1.8

Mining

6

1.9

Processing

7

1.10

Environmental assessment and licensing

7

1.11

Production plan and mine life

10

1.12

Economic analysis and cost estimates

10

1.13

Regulatory and production risks

11

1.14

Implementation agreement

12

1.15

Conclusions and recommendations

13

2

Introduction

14

2.1

Introduction and purpose

14

2.2

Report basis

14

3

Reliance on other experts

15

4

Property description and location

16

4.1

Location

16

4.2

Exploration and mining licences

17

4.3

Surface tenure

17

4.4

Resource use contract

17

4.5

Subsoil code

18

4.6

Strategic object

23

4.7

Royalties

23

4.8

Known environmental liabilities

23

4.9

Permitting

23

4.10

Factors affecting the right to work on the property

23

5

Accessibility, climate, local resources, infrastructure and physiography

25

5.1

Access

25

5.2

Climate

25

5.3

Physiography

25

ii

5.4

Local resources

26

5.5

Infrastructure

26

6

History

27

6.1

Ownership

27

6.2

Exploration and development history

27

6.3

Historical mineral resource and mineral reserve

29

6.4

Historical production

29

7

Geological setting and mineralization

31

7.1

Regional geology

31

7.2

Local and property geology

33

7.3

Mineralization

36

8

Deposit types

43

8.1

Roll-front deposits of the Chu-Sarysu Basin

43

9

Exploration

45

10

Drilling

46

10.1

Uranium exploration and delineation drilling

46

10.2

Methodology and guidelines

46

10.3

Core recovery

47

10.4

Geophysical logging

47

10.5

Factors that could materially affect the accuracy of the results

48

11

Sample preparation, analyses and security

50

11.1

Sampling density

50

11.2

Procedure for sampling and sample preparation

50

11.3

Assaying

50

11.4

Radioactivity, radium and equivalent uranium grades

51

11.5

Density sampling

51

11.6

Quality assurance/quality control

51

11.7

Adequacy of sample preparation, assaying, QA/QC and security

52

12

Data verification

53

13

Mineral processing and metallurgical testing

55

13.1

MPP, Sat1 and Sat2 processing plants

55

13.2

Production expansion test work

55

13.3

Deleterious elements at Inkai

56

14

Mineral resource estimates

57

14.1

Definitions

57

14.2

Key assumptions, parameters and methods

57

14.3

Resource classification

59

iii

14.4

Mineral resource estimate and classification

62

14.5

Factors that could materially affect the mineral resource estimate

63

15

Mineral reserve estimates

64

15.1

Definitions

64

15.2

Key assumptions, parameters and methods

64

15.3

Mineral reserve estimate and classification

65

15.4

Factors that could materially affect the mineral reserve estimate

66

16

Mining methods

67

16.1

Hydrogeology

67

16.2

Mining

71

16.3

Wellfield production

74

16.4

Production schedule

77

17

Recovery methods

80

17.1

Processing facilities

80

17.2

Reagents and energy requirements

81

17.3

Overall uranium recovery

82

17.4

Expansion project

83

18

Project infrastructure

84

18.1

Inkai facilities

84

18.2

UOC shipping routes

84

19

Market studies and contracts

86

19.1

Markets

86

19.2

Uranium sales contracts

86

19.3

Material contracts

87

19.4

Uranium price assumptions used for economic analysis

87

20

Environmental studies, permitting and social or community impact

88

20.1

Environmental considerations

88

20.2

Social and community requirements

92

21

Capital and operating costs

94

21.1

Capital cost estimates

94

21.2

Operating cost estimates

94

22

Economic analysis

96

22.1

Economic analysis

96

22.2

Sensitivities

96

22.3

Payback

98

22.4

Mine life

98

22.5

Taxes and royalties

98

iv

23

Adjacent properties

100

24

Other relevant data and information

101

24.1

Implementation agreement

101

24.2

Currency control regulations

102

24.3

Regulatory risks

102

24.4

Production and product delivery risks

106

24.5

Caution about forward-looking information

107

25

Interpretation and conclusions

110

26

Recommendations

111

27

References

....................................................................................................................

112

28

Date and signature page

114

v

Tables

TABLE 1-1: INKAI MINERALIZED HORIZONS

3

TABLE 1-2: EXPLORATION AND DELINEATION DRILLING AT INKAI

4

TABLE 1-3: SUMMARY OF MINERAL RESOURCES - AS OF SEPTEMBER 30, 2024

5

TABLE 1-4: SUMMARY OF MINERAL RESERVES - AS OF SEPTEMBER 30, 2024

6

TABLE 3-1: RELIANCE ON OTHER EXPERTS

15

TABLE 6-1: HISTORICAL DRILLING

27

TABLE 6-2: INKAI URANIUM PRODUCTION

29

TABLE 7-1: HORIZONS AND SUB-HORIZONS DIVISION

36

TABLE 7-2: EXTENT AND DIMENSIONS BY MINERALIZED HORIZON

39

TABLE 10-1: EXPLORATION AND DELINEATION DRILLING AT INKAI

46

TABLE 14-1: CUT-OFFS AND ADDITIONAL ESTIMATION PARAMETERS

59

TABLE 14-2: INKAI MINERAL RESOURCES - AS OF SEPTEMBER 30, 2024

62

TABLE 15-1: INKAI MINERAL RESERVES - AS OF SEPTEMBER 30, 2024

66

TABLE 16-1: HYDRAULIC CONDUCTIVITY

69

TABLE 16-2: LIST OF MINING EQUIPMENT

74

TABLE 16-3: RESERVES-BASED JV INKAI PRODUCTION SCHEDULE - 100% BASIS

79

TABLE 17-1: INKAI REAGENT CONSUMPTION

82

TABLE 19-1: EXPECTED AVERAGE URANIUM PRICES BY YEAR

87

TABLE 21-1: CAPITAL COST FORECAST BY YEAR - 100% BASIS

95

TABLE 21-2: OPERATING COST FORECAST BY YEAR - 100% BASIS

95

TABLE 22-1: ECONOMIC ANALYSIS BY YEAR - 100% BASIS

97

vi

Figures

FIGURE 1-1: ANNUAL PRODUCTION PLAN - 100% BASIS

10

FIGURE 4-1: LOCATION MAP

16

FIGURE 5-1: GENERAL LOCATION MAP

26

FIGURE 7-1: GEOLOGICAL MAP OF CHU-SARYSU BASIN AND ITS SURROUNDINGS

32

FIGURE 7-2: SCHEMATIC CROSS-SECTION OF THE CHU-SARYSU BASIN - LOOKING

WEST

32

FIGURE 7-3: SCHEMATIC STRATIGRAPHIC COLUMN FOR THE CHU-SARYSU BASIN

35

FIGURE 7-4: INKAI URANIUM ROLL FRONTS

37

FIGURE 7-5: ROLL-FRONT MORPHOLOGY OF MINERALIZATION

41

FIGURE 7-6: TYPICAL CHARACTERISTICS OF A ROLL-FRONT DEPOSIT

42

FIGURE 10-1: DRILL HOLE COLLAR LOCATION MAP

49

FIGURE 13-1: PROCESSING PLANTS TOTAL AVERAGE RECOVERY (2015-JUNE 30, 2024)

...............................................................................................................................................

55

FIGURE 14-1: TOTAL INKAI MINERAL RESOURCES BY CIM CATEGORIES

61

FIGURE 16-1: IN SITU RECOVERY SCHEMATIC

72

FIGURE 16-2: CONFIGURATION OF TYPICAL WELLFIELD PATTERNS USED AT INKAI

73

FIGURE 16-3: HISTORICAL YEARLY UBS VOLUMES

75

FIGURE 16-4: HISTORICAL YEARLY UBS HEAD GRADES

75

FIGURE 16-5: HISTORICAL YEARLY PRODUCTION BY MINING AREA

76

FIGURE 16-6. MONTHLY HEAD GRADE VARIABILITY

76

FIGURE 16-7: MPP, SAT1 AND SAT2 HISTORICAL RECOVERY CURVES

77

FIGURE 16-8: RESERVES-BASED JV INKAI PRODUCTION SCHEDULE - 100% BASIS

79

FIGURE 17-1: CURRENT INKAI FLOWSHEET

82

FIGURE 17-2: PROPOSED FLOWSHEET BASED ON ANNUAL PRODUCTION OF 10.4 M LBS

U3O8

83

FIGURE 18-1: INFRASTRUCTURE GENERAL ARRANGEMENT

85

FIGURE 22-1: SENSITIVITY ANALYSIS - 100% BASIS

96

FIGURE 23-1: ADJACENT PROPERTIES TO INKAI MA

100

vii

Units of Measure and Abbreviations

°C

Degree Celsius

$

Canadian dollar (unless otherwise indicated)

>

Greater than

<

Less than

%

Percent

a

Annum (year)

cm

Centimetre

d

Day

g

Gram

GT

Grade times Thickness

h

Hour

IX

Ion exchange

K

Thousand

km

Kilometre

km2

Square kilometre

L

Litre

L/sec

Litre per second

Lbs

Pounds

M

Million

MWh………………………………………………………. Megawatt per hour

m

Metre

m/a

Metre per annum

m/d

Metre per day

m2

Square metre

m2/d

Square metre per day

m3

Cubic metre

m%U3O8

Metre times percent uranium oxide

mg

Milligram

mm

Millimetre

sec

Second

t

Metric tonne

TDS

Total dissolved solids

U

Uranium (1 tonne U = 2,599.8 Lbs U3O8)

%U

Percent uranium (%U x 1.179 = % U3O8)

U3O8

Triuranium octoxide

%U3O8

Percent uranium oxide (%U3O8 x 0.848 = %U)

UBS

Uranium-bearing solution

UF6

Uranium hexafluoride

UOC

Uranium ore concentrate

viii

Definitions and Interpretation

In this technical report the following capitalized words, terms and expressions, and any derivations thereof as the context may require, will have the following meanings:

2009 Tax Code means the Code of the Republic of Kazakhstan dated December 10, 2006 No.99-IV "On Taxes and Other Obligatory Payments to the State Budget"

Amendment No. 6 means Amendment No. 6 to the Resource Use Contract, dated November 30, 2017

Block 1 means the 16.58 km2 area of land in the Suzak District of the Republic of Kazakhstan, which is designated as Block 1 in Licence Series AY 1370D

Block 2 means the 230 km2 area of land in the Suzak District of the Republic of Kazakhstan, which is designated as Block 2 in Licence Series AY 1371D

Block 3 means the 240 km2 area of land in the Suzak District of the Republic of Kazakhstan, which is designated as Block 3 in Licence Series AY 1371D

BTP means biological treatment plant Cameco means Cameco Corporation

CIM means Canadian Institute of Mining, Metallurgy and Petroleum

CIM Definition Standards means CIM Definition Standards for Mineral Resources and Mineral Reserves

Competent Authority means the appropriate state agency designated under the Subsoil Law as the competent authority; currently, the Ministry of Energy of the Republic of Kazakhstan is the Competent Authority for uranium resources

C1 means C1 category of mineral resources as defined by the GKZ classification system C2 means C2 category of mineral resources as defined by the GKZ classification system Geology Committee means the Geology Committee of the Republic of Kazakhstan

GKZ means State Reserve Commission of USSR which developed the GKZ classification system for mineral resources

Implementation Agreement means the agreement between Cameco, Kazatomprom and JV Inkai dated May 27, 2016, to restructure and enhance JV Inkai, as supplemented or amended from time to time

Inkai means collectively the mine operated by JV Inkai and the MA Area or, as the context requires, the uranium deposit

IRR means internal rate of return

ISL means in situ leaching, a mining process now referred to as ISR ISR means in situ recovery, a mining process described in Section 1.10

JV Inkai means Joint Venture Inkai Limited Liability Partnership, a limited liability partnership registered under the laws of the Republic of Kazakhstan. JV Inkai is currently owned by Cameco (40%) and Kazatomprom (60%)

KATEP means National Joint Stock Company Atomic Power Engineering and Industry "KATEP" Kazatomprom or KAP means Joint Stock Company "National Atomic Company "Kazatomprom"

KAZRC Code means the code developed in June 2016 by the Kazakhstan Association for Public Reporting of Exploration Results, Mineral Resource and Mineral Reserves (KAZRC) following the Committee for Mineral Reserves International Reporting Standards (CRIRSCO) template

Licences means Licence Series AY 1370D, which allowed for the mining of uranium on Block 1, and

ix

Licence Series AY 1371, which allowed for the exploration and further mining of uranium on Blocks 2 and 3 LOM Plan means the life of mine plan for Inkai

MA Area means the 139 km2 area in which JV Inkai currently has the right to mine, as covered by the Mining Allotment, which includes the historical Block 1 and portions of Blocks 2 and 3; now referred to as MPP Area, Sat1 Area and Sat2 Area, respectively

Mining Allotment means the document issued by the Geology Committee to JV Inkai in July 2017, which is a part of the Resource Use Contract, as provided for in Amendment No. 6, and which graphically and descriptively defines the area in which JV Inkai has the right to mine

MPP means JV Inkai's main processing plant that is located in the MPP Area MPP Area means the portion of Block 1 that is included in the MA Area

NI 43-101 means National Instrument 43-101 - Standards of Disclosure for Mineral Projects NPV means net present value

Project for Uranium Deposit Development (abbreviated PUDD) means the stipulated by Subsoil Code project documentation that contains the mining plan including mining methods, technical indicators as well as production volumes, timeframes and other parameters for uranium deposit development

Qualified person as defined in NI 43-101

Ramp-up means the increase in production at Inkai from its current rate of production to 10.4 million pounds U3O8 as detailed in the Implementation Agreement and the various supplemental agreements thereto

Redox means the oxidation-reduction reaction

Resource Use Contract (abbreviated RUC) means the resource use contract between the Republic of Kazakhstan and JV Inkai that was signed in July 2000 and that provides for JV Inkai's mining rights, as amended by Amendment Nos. 1-6. The Resource Use Contract includes the Mining Allotment

Sat1 means JV Inkai's Satellite Plant 1 processing facility that is located in the Sat1 Area Sat1 Area means the portion of Block 2 that is included in the MA Area

Sat2 means JV Inkai's Satellite Plant 2 processing facility that is located in the Sat2 Area Sat2 Area means the portion of Block 3 that is included in the MA Area

SRC means the State Reserve Commission of Kazakhstan

Subsoil Code means the Subsoil Code No. 125-VI, signed by the President of the Republic of Kazakhstan on December 27, 2017, effective as of January 08, 2018, as amended, and as further described in Section 4.5

Subsoil Law means the Law of the Republic of Kazakhstan "On Subsoil and Subsoil Use", dated June 24, 2010, as amended

Tax Code means the Code of the Republic of Kazakhstan dated December 2017 No.120-VI "On Taxes and Other Obligatory Payments to the State Budget"

TEO stands (from the Russian abbreviation) for "Technical and Economic Substantiation". The TEO of Permanent Conditions is prepared according to the results of completed exploration work. Its purpose is to establish the scale and commercial value of a deposit, to define the economic value of its development, and to aid decision-making on financial investments in mining development of the deposit. All financial estimates on the accepted option for commercial development of the deposit are carried out within the framework of realistically assumed values of all the modifying factors.

Volkovgeology means Volkovgeology Joint Stock Company

x

Disclaimer

Cameco Corporation published this content on November 12, 2024, and is solely responsible for the information contained herein. Distributed by Public, unedited and unaltered, on November 12, 2024 at 23:38:45.564.