• Home
  • Download PDF
  • Order CD-ROM
  • Order in Print
Figure 11    Rod Worth Curves for Example Problems
Control  Rod  Effectiveness - h1019v2_79

Nuclear Physics and Reactor Theory Volume 2 of 2
Page Navigation
  56    57    58    59    60  61  62    63    64    65    66  
CONTROL RODS DOE-HDBK-1019/2-93 Reactor Theory (Nuclear Parameters) Example 2: Using  the  differential  rod  worth  curve  provided  in  Figure  11,  calculate  the  reactivity inserted by moving the rod from 10 inches withdrawn to 6 inches withdrawn. Solution: The solution is basically given by the area under the curve for the interval.  The answers obtained in the following approximation may vary slightly depending upon the degree of approximation. Method 1. Treating  the  range  from  10  inches  to  6  inches  as  a  trapezoid,  that  is, taking  the  end  values  of  pcm/inch  and  multiplying  their  average  by  the 4 inches moved yields the following.                             8 pcm inch 3 pcm inch 2 4  inches         22  pcm This is negative because the rod was inserted. Method 2. Using the central value of rod position at 8 inches yields an average rod worth of 5.5 pcm/inch.   Multiplying by the 4 inches of rod travel yields the answer. (5.5 pcm/in.)(4 in.) = -22 pcm Method 3. Breaking  the  rod  travel  total  into  two  parts  (10  inches  to  8  inches  and 8 inches to 6 inches) yields:                                 8 pcm inch 5.5        pcm inch 2 2  inches         13.5  pcm                                 5.5        pcm inch 3        pcm inch 2 2  inches          8.5  pcm ( - 13.5 pcm) + ( - 8.5 pcm) = -22 pcm NP-03 Rev. 0 Page 54







Western Governors University

Privacy Statement
Press Release
Contact

© Copyright Integrated Publishing, Inc.. All Rights Reserved. Design by Strategico.