Westinghouse Approach and Experience on Operating VVER (PWR)1000 I and C Modernization

The paper will describe the background, current implementation approach and experience on the largest ever modernization program on operating units VVER 1000 (PWR) at Kozloduy Nuclear Power Plant in Bulgaria. The Modernization Program itself includes more than 212 measures. Westinghouse is modernizing the major I and C Systems at VVER 1000. (authors)