Diablo Canyon has a request for all BEACON users -
A recent review of our BEACON topical indicates a potential discrepancy between the BEACON topical and our Technical Specifications. The issue stems from the number of MIDS thimbles required to be used during a flux map. The BEACON topical in places states that the required number of thimbles is 75% with at least four thimbles per quadrant. Our Tech Specs only require two per quadrant. The draft COLR in the topical (provided to the NRC in an RAI on the topical) and the NRC SER on BEACON acknowledges the use of four per quadrant.
We requested approval to use BEACON PDMS through a license change that did not identify any deviations from the BEACON topical.
At this time, we have a conflicted licensing basis and are looking for input from other plants which may have a similar quandary. * How many thimbles do you require? (% and #/quadrant?) * Do you have a similar issue? * Did you identify this as a difference between the topical and your application of BEACON? * Do you have any other insights to share with respect to the use of BEACON?
Thanks in advance,
Mark Mayer Diablo Canyon Power Plant 805-545-4674
Mark,
Beaver Valley does not have Tech Spec BEACON. Additionally, when we converted to Improved Standard Tech Specs we moved the Incore detector requirements, 75 % and 2 per quadrant, to the Licensing Requirements Manual from the Tech Specs.
Anthony (A.R.) Burger Supervisor, Reactor Engineering FENOC - Beaver Valley Power Station Phone: (724) 682-4108 Cell: (724) 601-3224 FAX: (724) 682-4250 Email: aburger@firstenergycorp.com
From: "Mayer, Mark" MLM3@pge.com To: "'respvr@retaqs.com'" respvr@retaqs.com Date: 10/19/2011 12:42 PM Subject: [Respvr] BEACON Topical Question Sent by: respvr@retaqs.com
Diablo Canyon has a request for all BEACON users -
A recent review of our BEACON topical indicates a potential discrepancy between the BEACON topical and our Technical Specifications. The issue stems from the number of MIDS thimbles required to be used during a flux map. The BEACON topical in places states that the required number of thimbles is 75% with at least four thimbles per quadrant. Our Tech Specs only require two per quadrant. The draft COLR in the topical (provided to the NRC in an RAI on the topical) and the NRC SER on BEACON acknowledges the use of four per quadrant.
We requested approval to use BEACON PDMS through a license change that did not identify any deviations from the BEACON topical.
At this time, we have a conflicted licensing basis and are looking for input from other plants which may have a similar quandary. How many thimbles do you require? (% and #/quadrant?) Do you have a similar issue? Did you identify this as a difference between the topical and your application of BEACON? Do you have any other insights to share with respect to the use of BEACON?
Thanks in advance,
Mark Mayer Diablo Canyon Power Plant 805-545-4674 _______________________________________________ Respvr mailing list Respvr@retaqs.com http://www.keffective.com/mailman/listinfo/respvr
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aburger＠firstenergycorp.com -
Mayer, Mark