Universal xenon curve

This function gives the so-called universal xenon curve shown in Fig. 9.14. 

A. G. Ward, Universal Curve for the Prediction of Xenon Poison after a Reactor Shutdown, Atomic Energy of Canada Limited, CRRP-685, Jan. 25, 1957. 

The procedure for determining the xenon concentration in a particular situation from the universal curve is as follows. Given the ratio of xenon to iodine concentration at shutdown z, Eq. (9.289) is solved to obtain the effective shutdown time These solutions may be read directly from Fig. 9.15. If this value of 6 is then marked on the abscissa of Fig. 9.14, the curve to the right of this point gives the relative variation in xenon concentration for all subsequent time. Thus if X, is the actual concentration at shutdown and x(d ) the value read from the curve of Fig. 9.14, then X,x(0)/x(0 ) is the concentration at time — d after shutdown. 

It subsequently proved advantageous to develop expressions for universal curves based on experimental results for the correlation of dense fluid transport properties. This is discussed fully in Chapter 10 with respect to xenon, for which accurate diffusion data are available, in addition to viscosity measurements, up to high densities. In the case of diffusion, there is very satisfactory agreement between the exact hard-sphere results and experimental data. 

---

See also in sourсe #XX -- [ ]

---