Dedication of Digital Items based on IEC 61508 SIL Certification for Nuclear Power Plant

초록

Although various digital devices are used in nuclear power plants nowadays, the limited supply of safety-grade devices with high-reliability have led to a high demand to utilize general industrial devices. However, since it is not an easy process to apply the current regulatory guidelines for commercial grade item dedication (CGID), the need to introduce a new CGID process is required. One of the approaches of the new CGID process is to adopt the conformity verification method based on the IEC 61508 Safe Integrity Level (SIL) certification, which is a widely used industrial standard. This paper investigates the certification procedures defined by IEC 61508 SIL and compares it to the current regulatory used in the nuclear industry.