Alcoa Plans to Declare Force Majeure  NEW YORK (Reuters) - Alcoa Inc. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=AA.N target=/stocks/quickinfo/fullquote"&gt;AA.N&lt;/A&gt; on Tuesday said it  plans to declare force majeure to its customers due to a  temporary shutdown at its Jamalco refinery in Jamaica and  damage to the port from which the plant ships its alumina  caused by Hurricane Ivan.