Cameco and AREVA Celebrate Start of Production at Cigar Lake

SASKATOON, SASKATCHEWAN--(Marketwired - Sep 23, 2015) -

ALL AMOUNTS ARE STATED IN CDN $ (UNLESS NOTED)

Cameco (CCO.TO) (CCJ) and AREVA officially marked the start of production at the Cigar Lake uranium mine and McClean Lake mill today at the minesite in northern Saskatchewan, Canada.

Cameco president and CEO Tim Gitzel, and Olivier Wantz, member of the executive committee and senior executive vice-president, mining and front end business group for AREVA, welcomed dignitaries including Saskatchewan Economy Minister Bill Boyd and community leaders from northern Saskatchewan, and led a tour of the underground workings.

"I thank all of our stakeholders and partners whose strong support helped us bring this rich and challenging deposit into production," said Tim Gitzel. "This achievement took 10 years, great perseverance and technical creativity, and I commend the many people who contributed."

"We are happy to celebrate these two major uranium mining assets in Saskatchewan, the Cigar Lake mine and the McClean Lake mill," said Olivier Wantz. "Their successful operation demonstrates the determination and expertise of our employees to ensure the safe start-up and continued production."

Mining at Cigar Lake began in March 2014. The first packaged uranium concentrate was produced in October 2014 at the McClean Lake mill which is majority owned and operated by AREVA Canada Resources Inc.

During 2015, through September 19, the McClean Lake mill processed and packaged 6.1 million pounds of uranium concentrate (U3O8) from ore mined at Cigar Lake.

The jet boring mining system (JBS) continues to perform as expected. There are now three JBS machines commissioned for use underground. Cigar Lake has achieved the lower threshold of its 2015 production target range of 6 million to 8 million packaged pounds (100% basis) for Cigar Lake and McClean Lake. We are reviewing the target and will provide an update in Cameco's third quarter report.

As production ramps up to 18 million pounds (100% basis) by 2018, volumes may not be linear year-to-year, but will vary based on our operational experience. To ensure the most efficient operation of the mine and mill throughout the year, we expect to continually manage ore supply and, therefore, may halt and resume mining several times during a quarter without impacting planned annual production.

The Cigar Lake mine is owned by Cameco (50.025%), AREVA Resources Canada Inc. (37.1%), Idemitsu Canada Resources Ltd. (7.875%) and TEPCO Resources Inc. (5.0%) and is operated by Cameco. The operation employs more than 600 highly-skilled workers, with the majority being residents of Saskatchewan's north.