PRESTO--A PRESSURIZER TRANSIENT PROGRAM FOR THE IBM-704

Technical Report · Mon Aug 01 04:00:00 EDT 1960

OSTI ID:4121899

Cunningham, J P; Meyer, H R

Presto, a code written for the IBM 704 to represent the transient operation of a steam pressurizer, is described. Volume in the pressurizer is divided into a steam region and three arbitrarily deflned water regions with variable boundaries; the metal container is divided into corresponding regions to facilitate heat-transfer calculations. Mechanisms considered include mixing of surge water with water in the pressurizer, boiling, condensation, heat transfer, pressure drop across the surge pipe, and the control functions of heaters, spray, relief valves, and an external feed and bleed system. The code is designed to accommodate a wide variety of assumptions regarding these phenomena, which must be incorporated in the input data. Input information tabulated as functions of time includes either the volume surge rate into the pressurizer or the net heat flow to the coolant system producing the surge, as well as coolant temperature at the surge pipe inlet and enthalpy of spray entering the pressurizer. A fourth- order Runga-Kutta method is used to solve numerically the differential equations involved. (auth)

• Research Organization: Westinghouse Electric Corp. Atomic Power Dept., Pittsburgh
• NSA Number: NSA-15-001747
• OSTI ID: 4121899
• Report Number(s): YAEC-141
• Country of Publication: United States
• Language: English

Related Subjects

BOILERS
BOILING
COMPUTERS
COOLING
DIFFERENTIAL EQUATIONS
HEAT TRANSFER
LIQUEFYING
MATHEMATICS
MATHEMATICS AND COMPUTERS
PRESSURE
PROGRAMMING
STEAM
WATER