4/2003 Rev 2 I.4.9c – slide 1 of 8

Session I.4.9c

Part I Review of Fundamentals

Module 4 Sources of Radiation

Session 9c Fuel Cycle - Milling

IAEA Post Graduate Educational CourseRadiation Protection and Safety of Radiation Sources

4/2003 Rev 2 I.4.9c – slide 2 of 8

Milling

OPEN CUT MINEORE STOCKPILE

CRUSHERS

BALL

MILLWATERADDED

GRINDS TO AFINE POWDERTHICKENER

THICKENER

THICKENER

ACIDADDED

LEACHINGTANKS SAND

FILTER SOLVENTEXTRACTION

URANIUMPRECIPITATION

TANK

CENTRIFUGE

DRYERU3O8U3O8

TOMARKET

WASTE TOTAILINGS DAM

URANIUM RICH SOLUTION

4/2003 Rev 2 I.4.9c – slide 3 of 8

Uranium Mills in the United States

4/2003 Rev 2 I.4.9c – slide 4 of 8

Ore Processing

4/2003 Rev 2 I.4.9c – slide 5 of 8

Yellowcake

4/2003 Rev 2 I.4.9c – slide 6 of 8

Uranium Mill Tailings

4/2003 Rev 2 I.4.9c – slide 7 of 8

Facility Tailings (tx106)

Quivira (Ambrosia) 33.0ARCO (Bluewater) 24.2Homestake (Grants) 22.0 EXXON (Highlands) 11.3 Pathfinder (Lucky MC) 10.7 Atlas (Moab) 10.6 UMETCO (Gas Hills) 9.2WN (Split Rock) 7.7Pathfinder (Shirley B) 7.1

Conventional US Mill Tailings

Facility Tailings(tx106)

Petrotomics 6.4ANC (Gas Hills) 5.9Union Pac (Bear Creek) 4.7UNC (Church Rock) 3.6TVA (Edgemont) 3.5Rio Algom (Lisbon) 3.3Kennecott (Sweetwater) 2.4IUC (White Mesa) 2.2SOHIO (Western L) 1.2Plateau (Shootaring) 0.05

4/2003 Rev 2 I.4.9c – slide 8 of 8

Ore dust and radon emissions from ore crushing, sorting, and storage

Yellowcake dust from drying and packaging area

Windblown particulates and radon emission from the tailings disposal area

Radiological Hazards of U Milling