At present, digital instrument control equipment and systems are widely used in nuclear power plants, in which computer is an important component of digital instrument control system. But the upgrading period of software and hardware system is very short. It is often faced with the shutdown of spare parts and the upgrade of software and hardware platform that can’t support the original application software, which brings great challenges to the life management of computer. This paper expounds the application status of computer in the digital instrument and control system of nuclear power, the characteristics of life management, obsolescence solutions and risks, and introduces the virtual server technology. The application cases of Demineralized Water Production System (hereafter called SDA) booster upgrading project in a nuclear power plant are summarized, and the application scope and limitations of virtualization obsolescence management strategy are summarized. The practice shows that virtual server technology can effectively solve the problem of computer life cycle management in some cases, which is conducive to reducing costs and increasing efficiency, and improving the competitiveness of nuclear power.

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