Process data validation in CCGT and nuclear power plants

摘要

Process data validation is employed for monitoring and optimising processes in nuclear power plants,combined-cycle gas turbine power plants, coal-fired power plants, refuse incineration plants and gaspower pools, as well as in the chemical and petrochemical industries. It is a method for determining aconsistent process image, taking closed mass, energy and materials balances into account. It takes theplace of:· Cost-intensive acceptance and inspection measurements,· Part of the instrumentation within the processes.If it is installed online, it supplies a continuous stream of results, allowing impermissible developmentsduring operation or in the plant to be quantitatively estimated. Data validation also yields information aboutoperating states in non-instrumented or insufficiently instrumented parts of the plant. If data validation isintegrated in the installation early on during the project planning phase, it is possible to reduce the numberof measuring points compared with that considered necessary in the past. Since the saving per measuringpoint is approximately 15,000 EURO, this can represent a substantial reduction in the cost for investmentsin the plant. Depending on the type and size of the plant, as much as 125,000 EURO can be savedadditionally every year because fewer key measuring points need to be calibrated.This work describes experience with online process data validation in CCGT and nuclear power plants(boiling water and pressurised water reactors).