Thanks Daniel. I'll be taking a look at it. -Steve
From: [email protected] [mailto:[email protected]] On Behalf Of Daniel Glick Sent: Friday, May 27, 2011 2:56 PM To: power Net Subject: RE: Powernet: Characterization of cartridge filters Steve, Dresden has a filter punch that takes samples underwater for the Trinuke filters. This seems to be the best method to obtain the sample. We obtained ours years ago from some processing company. Trinuke sells one: Filter Sampler Model FS-12 TRI NUCLEAR has developed a light weight, pneumatic, underwater filter sampler that will take a 1/2in dia punch sample of a Tri Nuclear filter cartridge. The filter cartridge media is sampled ~12in down from the top of the filter. http://www.trinuclear.com/index_files/Page4637.htm You just have to get approval to place in the pool. If this is not an option you should try to get a surrogate sample. You can get some of the sample filter media and run an amount of water into through the filter to get an appropriate sample. If you have any other questions please let me know. ________________________________ From: [email protected] To: [email protected] Date: Fri, 27 May 2011 13:08:54 -0400 Subject: Powernet: Characterization of cartridge filters Looking to benchmark best practices on characterization of filters used in liquid processing systems (e.g. Trinuc filters) for shipment/disposal. At Ginna, our practice is to take a core-bore type sample of each filter. The nuclide information obtained is then used to perform dose-to-curie evaluations. We have been challenged as to whether this practice is efficient and ALARA. What is everybody else doing? - "Core-bore" sample of each filter? - "Core-bore" sample of a representative selection of filters? o How do you ensure your selection is representative? - Smears? o Where/how many? - Something else? Have your chosen techniques been questioned/challenged by the regulators? Thanks, -Steve Stephen J Holmes Sr. Plant Health Physicist RE Ginna NPP Constellation Energy Nuclear Group [email protected] 585-771-3577; 585-545-1661 (cell) >>> This e-mail and any attachments are confidential, may contain legal, professional or other privileged information, and are intended solely for the addressee. If you are not the intended recipient, do not use the information in this e-mail in any way, delete this e-mail and notify the sender. CEG-IP2
