BLAZER: A RELAP5/MOD1 Post Processor to Generate Force-Time History Input Data from Structural Computer Codes.

摘要

This paper describes computer code BLAZER, a post processor to the RELAP5/MOD1 thermal hydraulics code. BLAZER computes fluid induced piping forces and places them in structural code input format. The equations for fluid induced force calculations are presented, beginning with the fluid properties and detailing the pressure, momentum, and acceleration components of the interaction force. A unique feature allows the number of time-force pairs describing the forcing function to be reduced, since some structural codes such as NUPIPE-II limit this number. This reduction process maintains peaks and permits the concentration of force description points in time intervals where the forcing function experiences the most variation. The programs' plotting capability, which allows the analyst to compare the original and modified forcing functions and determine if proper reduction was achieved, is described. Input to structural codes SAP IV, NUPIPE-II, and ADINA can be produced by BLAZER. Capability to store intermediate results on tape is available. As an aid to the piping analyst, a step-by-step method for carrying out the calculation is included. (ERA citation 07:047682)