In PWRs - a different LWR system - control rods are withdrawn from the core, and the control is acheived with soluble B-10 in the coolant (which is buffered with LiOH) to maintain a pH above 6.9 or perhaps closer to 7.1 -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 thought or organizational pattern is established by using transitions, or signal words, to show the logical relationship between ideas within a sentence, between sentences, in a paragraph or in a passage. The chart below outlines some of the commonly used patterns and signal words. Please note that some of the signal words are used in more than one pattern. When this is the case, the reader must pay close attention to the relationship between the main idea and details of the passage. Patterns of Organization.