Patent Document ID: 5579354
Application ID: 08359362
Patent Flag: 1

Claim One:
1. A plant monitoring system for monitoring a plant including a sensor for detecting a concentration of at least one species of a certain specified substance existing within the plant, comprising: a memory unit storing therein a formula of a relationship between a corrosion rate and a corrosion potential that is derived from at least two reaction rate equations relevant to at least one reaction process model indicating at least two steps of consecutive elementary electrochemical reaction processes in which the specified substance participates within said plant, and information on a reaction rate of a reaction that is taking place with respect to a structural material of said plant; an arithmetic and control unit which computes a potential of the structural material by using the formula and the information on the reaction rate stored in said memory unit, and the concentration of said specified substance detected by said sensor; and an output unit for delivering the potential of said structural material computed by said arithmetic and control unit.