RE: Reactivity Units

["Ruyter, David S." <David.Ruyter@pseg.com>]

One dollars worth of reactivity is that amount of excess reactivity that
will cause a reactor to go prompt critical (i.e., no reliance on delayed
neutrons to maintain criticality).  One inhour of excess reactivity results
in a reactor period of one hour.

-----Original Message-----
From: bbailey@handrtech.com [mailto:bbailey@handrtech.com]
Sent: Tuesday, August 08, 2000 10:35 AM
To: Multiple recipients of list
Subject: Reactivity Units


I am currently reviewing some safety documents and have run into some units
I am
unfamiliar with concerning reactivity.  The reports refer to so many dollars
worth of positive or negative reactivity addition to an assembly of
fissionable
materials.  Units are in $ and cents.  Can a dollars' worth of additional
reactivity be defined? How?

Respond privately to: bbailey@handrtech.com

Thank you.

=====================================================================
                            
                                     H&R
                    TECHNICAL ASSOCIATES, INC.            
Brian Bailey                                                                
H&R Technical Associates, Inc.
P.O. Box 4159
Oak Ridge, TN  37831-4159
bbailey@handrtech.com
(865) 483-0248

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