Estimate of Detector Flux Decrease Due to the Presence of an Absorber in Bruce Reactor

Abstract

This paper presents the investigation supporting a possible method for measuring detectors prompt fraction, without the need for a reactor shutdown. A rapid flux depression can be induced in a detector by inserting an absorber in the same detector assembly. This paper calculates the static flux depression that would occur. Several configurations of absorber placed beside the detector are investigated with both DRAGON and MCNP.