Ben inspired me to check the Fermi 2 FSAR. There's no indication that this is proprietary data, so I can post this. We are a BWR, so there is N-16 in both the steam and the reactor water. The values given for N-16 are: steam: 100 uCi/g reactor water: 62 uCi/g These are described as follows: "The coolant activation products are not adequately correlated by simple equations. Design-basis concentrations in reactor water and steam have been estimated conservatively from experience data..." Keep in mind that these are for purposes of a safety analysis. They are thus likely to be upper bounds of the expected values. The opinions expressed are strictly mine. Here's to a risk free world, and other fantasies. Bill Lipton liptonw@detroitedison.com
- To: Multiple,recipients,of,list,radsafe@romulus.ehs.uiuc.edu
- Subject: RE: N-16 equilibrium in coolant ???
- From: "radsafe@romulus.ehs.uiuc.edu" <radsafe@romulus.ehs.uiuc.edu>
- Date: 28 Jul 97 12:45:08
- Reply-to: radsafe@romulus.ehs.uiuc.edu
James, Regarding your question about N-16 in power reactor coolant. There is a table (Table 11.1.4-1) in our Safety Analysis Report which gives values of N-16 at various points in the coolant loop. Unfortunately this information comes from a proprietary Westinghouse document and so I can't list it here. Other reactors would have a similar table and if you have access to one of these safety reports you can look it up. Also, pages 520 - 524 of the 2nd edition of Lamarsh's "Introduction to Nuclear Engineering" gives the formula for determining this number and, for a reactor with a power density of 55 watts/cm^3 in which the coolant is in the reactor for three seconds and outside the reactor for two seconds, the N-16 equilibrium activity is 249 uCi/cm^3. Sorry I can't be more specific. Ben >ben.morgan@cplc.com > > > >