PWRRM October 2011

pwrrm@retaqs.com

4 participants
3 discussions

Boric Acid Weight Percent in Batching Tanks
by John F Helfenberger 24 Oct '11

24 Oct '11

Have any PWR plants recently increased their boric acid weight percent (for example, 8.0 to 10.0 weight percent) in their batching tanks? I am interested in knowing if any plants have recently increased their boric acid concentrations and any operating experience you may have related to this. Thanks, John F. Helfenberger, Lead Reactor Engineer, Kewaunee Power Station bus. 920.388.8294 Dominion Tie-line - 8.691.8294 pag. 920.704.4471 CONFIDENTIALITY NOTICE: This electronic message contains information which may be legally confidential and/or privileged and does not in any case represent a firm ENERGY COMMODITY bid or offer relating thereto which binds the sender without an additional express written confirmation to that effect. The information is intended solely for the individual or entity named above and access by anyone else is unauthorized. If you are not the intended recipient, any disclosure, copying, distribution, or use of the contents of this information is prohibited and may be unlawful. If you have received this electronic transmission in error, please reply immediately to the sender that you have received the message in error, and delete it. Thank you.

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Boric acid Weight Percent Modification Question
by Kenneth R Pike 24 Oct '11

24 Oct '11

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Fw: [Respvr] BEACON Topical Question
by Kenneth R Pike 19 Oct '11

19 Oct '11

Putting this out on pwrrm for responses ----- Original Message ----- From: Mayer, Mark To: 'respvr(a)retaqs.com' Sent: Wednesday, October 19, 2011 12:41 PM Subject: [Respvr] BEACON Topical Question 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. a.. How many thimbles do you require? (% and #/quadrant?) b.. Do you have a similar issue? c.. Did you identify this as a difference between the topical and your application of BEACON? d.. 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(a)retaqs.com http://www.keffective.com/mailman/listinfo/respvr

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PWRRM October 2011