• Home
  • Download PDF
  • Order CD-ROM
  • Order in Print
Xenon  Summary
SAMARIUM AND OTHER FISSION PRODUCT POISONS

Nuclear Physics and Reactor Theory Volume 2 of 2
Page Navigation
  44    45    46    47    48  49  50    51    52    53    54  
XENON DOE-HDBK-1019/2-93 Reactor Theory (Nuclear Parameters) Xenon  Summary (Cont.) A  xenon-135  oscillation  may  be  caused  by  a  rapid  perturbation  in  the  core  power distribution.   The  xenon-135  oscillation  can  change  local  power  levels  in  the  core by a factor of three or more. Following  a  reactor  shutdown,  xenon-135  concentration  will  increase  due  to  the decay  of  the  iodine  inventory  of  the  core.    Xenon-135  will  peak  approximately 10 hours  after  the  shutdown  (from  100%)  and  then  decrease  as  xenon-135  decay becomes greater than the iodine-135 decay. The greater the pre-shutdown power level, the greater the peak value of xenon. The core can be considered xenon-free about 3 days after shutdown. A xenon precluded startup occurs when there is insufficient reactivity in the control rods to overcome the negative reactivity of xenon-135. Xenon  dead  time  is  the  period  of  time  where  the  reactor  is  unable  to  override  the effects of xenon. After  a  power  decrease,  xenon-135  concentration  will  initially  increase  due  to production by iodine decay being greater than the burnout.   Xenon-135 will reach a maximum  about  8  hours  after  the  power  decrease  and  then  decrease  to  a  new, lower equilibrium value. NP-03 Rev. 0 Page 42







Western Governors University

Privacy Statement
Press Release
Contact

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