Discussion on modelling and computational techniques

MR P0 DULSON (Paper 25): Inevitably the Paper describes only briefly the complexity involved in the modelling of the major plant items of the total plant models. As stated in the Paper, the functional specification for the AGR training simulator defined the factors which determined the size and configuration of the models. With the resulting models containing up to 410 differential equations and perhaps 5000 algebraic equations, it is not feasible to publish the mathematical content.

The formulation and construction of the total plant models for both AGR simulator reference and design purposes has meant the most efficient employment of resources. The establishing of a common data base approach to total plant design, assessment, and safety studies, when fully accepted, will shift the emphasis from manpower resource to computing resource. With the continual evolution of faster and cheaper computing techniques and hardware this approach promises increasing savings. Detailed design, sensitivity, and stability studies of individual plant items such as reactors and boilers are undertaken on existing specialized codes. (The statement concerning the provision of local simulator facilities, at power station sites, is a personal view. The official policy of the CEGB will be determined by a review panel of experts.)