U.S. independent power producer Calpine Corp.'s subsidiary Calpine Construction Finance Co. L.P. (CCFC) plans to raise $1.055 billion in senior secured term loan B debt due 2020. Calpine will use proceeds to retire the existing $978 million in senior secured debt related to CCFC due in 2016, lowering interest expense and moving a 2016 maturity to 2020. We assigned our 'BB' issue rating and '1' recovery rating to the proposed CCFC debt issuance. The rating reflects the corporate credit rating of Calpine adjusted for recovery prospects. The stable outlook for CCFS's debt reflects that of Calpine. The CCFC debt issuance has no effect on Calpine's corporate credit or debt ratings. On April 26, 2013, Standard&Poor's Ratings Services assigned