Re: Powernet: Underwater EDM on Primary Components (Quick Benchmark)

[Eric . Goldin]

Hi Barbara,    many, many moons ago, we (San Onofre) did EDM on the fuel alignment plate.  Not the same as your work on the alignment pins but still EDM on highly activated material.  The main thing I recall was that in spite of all the efforts to ensure aggressive underwater vacuuming for debris, there was significant material (discrete particles) remaining on the cavity floor that presented contamination control challenges when the work was complete and equipment was being removed from the pool.  And then again once drained down and conducting final cavity cleaning.  I don't recall any airborne issues because the particles were "large."   Hope that helps.  Eric

Eric M. Goldin, CHP
Southern California Edison
<eric.gol...@sce.com>



From:        BJ Thompson <bj.thomp...@dom.com>
To:        "powernet@hps1.org" <powernet@hps1.org>
Date:        04/10/2012 02:12 PM
Subject:        Powernet: Underwater EDM on Primary Components (Quick Benchmark)
Sent by:        owner-power...@hps1.org

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We are preparing to inspect and possible repair a bent alignment pin on our Upper Internals package.  Is there any OE you would like to share on contamination controls, airborne radioactivity, high activity particle generation, etc.
 
Thanks for your fast feedback!
 
 
Barbara J. Thompson
Supervisor of Exposure Control
Dominion - North  Anna Power Station
Email:  bj.thomp...@dom.com
Phone:  540-894-2605
Beeper: #3469
FAX:  540-894-2408
 
 

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----------------------------------- Powernet - a service of the Health Physics Society Power Reactor Section Powernet archives at http://www.mail-archive.com/powernet@hps1.org/ Reply to: powernet@hps1.org If Questions, contact Mike Russell, CHP at russe...@songs.sce.com