Community Research and Development Information Service - CORDIS

Abstract

In fuel - coolant interaction research a shock trigger produces a pressure wave or shock which introduces a disturbance in a coarse fuel coolant mixing by fragmentation and enhanced heat transfer: if the disturbance propagates, a thermal detonation ensues. Up to now such triggers are characterized by giving their pressure history, that is maximum pressure, pulse length and impulse. A method is presented to measure a work potential as well. Small triggers which generate less than 100 J are: bridge or explosive wires, mechanical blows, minidetonators and small gas triggers. Strong triggers which generate more than 100 J are: explosive charged minidetonators and strong gas triggers. All triggers mentioned above generate triangular pulses. Calculational models assume rectangular pulses with pulse times near to one ms. Only very energetic real triggers can produce the effect of these simple triggers assumed in codes.

Additional information

Authors: SCHINS H JRC ISPRA ESTAB. (ITALY), JRC ISPRA ESTAB. (ITALY)
Bibliographic Reference: NUCLEAR ENGINEERING AND DESIGN, VOL. 94, (1986), PP. 93-98
Record Number: 1989124134100 / Last updated on: 1987-01-01
Category: PUBLICATION
Available languages: en