AW: H-3 production (follow up to C-14 production)

[Franz Schönhofer <franz.schoenhofer@CHELLO.AT>]

Franz Schoenhofer

PhD, MR iR

Habicherg. 31/7

A-1160 Vienna

AUSTRIA

phone -43-0699-1168-1319



Ben,



Thank you very much for your comprehensive explanation. It confirms my

opinion that there is always somebody at RADSAFE who can answer even the

most specialized questions!



Franz



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-----Ursprüngliche Nachricht-----

Von: owner-radsafe@list.vanderbilt.edu

[mailto:owner-radsafe@list.vanderbilt.edu] Im Auftrag von Morgan, Ben

Gesendet: Montag, 30. August 2004 17:04

An: =?iso-8859-1?Q?Franz_Sch=F6nhofer_; radsafe@list.vanderbilt.edu

Betreff: RE: H-3 production (follow up to C-14 production)



Greetings:



American National Standard ANSI/ANS-18.1-1999, "radioactive source term

for normal operation of light water reactors", shows the tritium

concentration in reactor coolant as 1.0E-02 uCi/g for BWRs and 1.0 uCi/g

for PWRs.



Unlike BWRs, PWRs use boric acid in the coolant as a form of reactivity

control. This produces tritium from B10(n,2a)T and B10(n,a)Li7(n,na)T

reactions.



The pH of the PWR coolant is controlled by the addition of LiOH which

contains primarily Li7. This produces tritium by the Li7(n,na)T

reaction.



NOTE: There are also B11 and Li6 reactions that produce T but these are

negligible contributors.



Regards,



Ben



ben.morgan@pgnmail.com

 







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