[Global] Higher Containment Building atmospheric tritium following transition from 18 month to 24 month core

[Barber, Jerry M]

Good morning!

We have recently seen an increase in Containment atmospheric tritium which coincides with a 2 year core where boron (and lithium) are considerably higher for an extended period BOC than we were accustomed to with any of our 18 month cores.

I would like to know if other PWRs that have made this transition have seen anything similar?


Jerry Barber
Lead Scientist - Chemistry
Robinson Nuclear Plant
Office 843-951-1496
Mobile 843-861-2524
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From: Gainey, Chase <Chase.Gainey at duke-energy.com>
Sent: Monday, July 12, 2021 9:22 AM
To: Barber, Jerry M <Jerry.Barber at duke-energy.com>
Subject: Industry CV H3

Jerry,

Steve told me to ask you to send out a message to the industry asking about if there has been a similar increase in CV atmosphere tritium following the change to 24 month cycle fuel.  He said something about Powernet, and I don't know what that is?

He has also asked me to write up all we know about this and how we would be able confidently perform a purge in the future with this elevated H3.  So I was going to include the calculations you performed this weekend showing the time-weighted average tritium.

-Chase
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