Such risks and uncertainties include , among others , the actual results of current exploration activities , conclusions of economic evaluations , changes in project parameters as plans continue to be refined , availability of equipment , materials and fuel , possible variations in grade and ore densities or recovery rates , failure of plant , equipment or processes to operate as anticipated , accidents , labour disputes or other risks of the mining industry , delays in obtaining government approvals or financing or in completion of development or construction activities , risks relating to the integration of acquisitions , to international operations , to prices of uranium and gold , to price of electrical power and sulphuric acid .