In PWRs - a different LWR system - control rods are withdrawn from the core, and the control is acheived with soluble B-10 in the coolant (which is buffered with LiOH) to maintain a pH above 6.9 or perhaps closer to 7.1 - 7.4 for purposes of minimizing the accumulation of crud (metal corrosion products) on the fuel.
Rhetorical patterns have an additional function of helping writers to organize information in ways their readers can understand easily (425). Another term for these patterns is topoi (commonplaces). Many of these topoi are useful in numerous situations.
A rhetorical device is a use of language that is intended to have an effect on its audience. Repetition, figurative language, and even rhetorical questions are all examples of rhetorical devices. You hear me? Rhetorical devices are common, such as saying language is a living beast: that's a metaphor â one of the most common rhetorical devices.