Based on the present outsourcing risk studies, the risks related to outsourcing under the condition of discontinuous demand are studied, especially in the field of nuclear power plant supply management which is dominated by discontinuous demand. The characteristics of the discontinuous demand may easily induce the misunderstanding of core competency, the locked-up by suppliers at the very beginning of procurement process, the loss of following-up of suppliers and technical development, and further more the more severe risks and consequences.