SYDNEY, Feb. 9 -- Around 1,200 Alcoa alumina and bauxite workers in west Australia plan to stage industrial actions on Thursday over stalled wages talks, but Alcoa said it was not expecting production losses.

The Australian Workers Union have not revealed what type of actions its members would take but a union source said they would cause "minimal" disruption at Alcoa's Wagerup alumina refinery, Willowdale and Huntley mines and the Port of Kwinana.

"Alcoa has a full contingency plan in place to minimise any impact on production," an Alcoa spokeswoman said on Tuesday.

"We're confident of negotiating an outcome that is fair to both parties," the spokeswoman added.

Alcoa of Australia is 60 percent owned by Alcoa Inc (AA.N: Quote) and 40 percent Alumina Ltd (AWC.AX: Quote).

The Wagerup refinery can produce annually up to 2.6 million tonnes of alumina, the ingredient used to make aluminium.

Workers at another alumina refinery, in Pinjarra, west Australia, are employed under a separate work agreement and are not participating in Thursday's actions, the Alcoa spokeswoman said.