In the failure probability for the individual breaking phenomenon

摘要

PROBLEM TO BE SOLVED: To provide a device capable of performing suitable maintenance management corresponding to a remaining service life. SOLUTION: This device is provided with a means 8 for defining a maximum value, with which a weight coefficient for each damage form predetermined for each member is multiplied to the destruction probability of equipment and each of members constituting a plant to each of destruction phenomena under present operation conditions, as a plant risk estimate value, a means 9 for finding a plant operation limit value by calculating operation conditions, with which the plant risk value finding the maximum value by multiplying the weight coefficient for each damage form to the destruction probability of each of members to each of destruction phenomena under estimate operation conditions does not exceed a set value, a means 10 for calculating future service life consumption on the basis of an operation schedule from the remaining service life evaluation information of the member at the present time point, and a means 11 for calculating a plant operation risk estimate value by evaluating the transition of the destruction probability for each operation schedule on the basis of the remaining service life evaluation information at the present time point and a remaining service life prediction in the future calculated on the basis of the operation schedule and multiplying the weight coefficient for each damage form of each of members to the transition data of the destruction probability.