Calpine Corp. said Friday it expects claims in bankruptcy court to be significantly greater than the $17.4 billion in liabilities it reported at the end of last year.

In filing its annual report with the Securities and Exchange Commission, the beleaguered San Jose, Calif.-based power producer noted that the reason for this could be multiple claims from one creditor against more than one Calpine debtor or multiple claims by multiple creditors against a single liability.