ABSTRACT The use of cured-in-place pipe (CIPP) and Carbon Fiber Reinforced Polymer (CFRP) liners for the rehabilitation of nuclear power plant raw water systems can result in significant cost savings, increased system reliability, and extended piping life. These systems also include the use of internal mechanical seals. The cost advantage for installation of CIPP alone may reach 10:1 for the nuclear power industry versus excavation and replacement of buried carbon steel piping. This paper will present recent examples of these applications, including unique requirements faced in the nuclear industry such as more detailed material and system qualification, licensing, and working within outage and operational restrains, e.g. Key words: Cured-In Place Pipe, CIPP, Carbon Fiber Reinforced Polymer, CFRP, Nuclear Power INTRODUCTION Adoption of composite materials for repair of piping systems at nuclear power generation facilities has gained interest as technology has improved and as more operational experience (OE) becomes available. Evaluations have been performed for several utilities of alternate in-situ repair - replacement technologies for buried and inaccessible portions of piping systems. Requests for permission to publish this manuscript in any form, in part or in whole, must be in writing to NACE International, Publications Division, 15835 Park Ten Place, Houston, Texas 77084.