Paper Profile

Validation of Moderator-Level Reactivity Coefficient Using Station Data

Documents: Full paper available in Conference Proceedings.
Date: Tuesday October 20
Time:10:45 - 11:10
Session:2A2: V&V, Uncertainty Quantification I
Authors: Mohamed Younis (AMEC Foster Wheeler)
Iouri Martchouk (AMEC Foster Wheeler)
P.D. Buchan (Ontario Power Generation)

The reactivity effect due to variations in the moderator level has been recognized as a reactorphysics phenomenon of importance during normal operation and accident analysis. The moderator-level reactivity coefficient is an important parameter in safety analysis of CANDU reactors, e.g., during Loss of Moderator Heat Sink as well as in the simulation of Reactor Regulating System action in CANDU reactors that use moderator level for reactivity control.

This paper presents the results of the validation exercise of the reactor-physics toolset using the measurements performed in Pickering Unit 4 in 2003. The capability of the code suite of predicting moderator-level reactivity effect was tested by comparing measured and predicted reactor-physics parameters.

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