Fermi 2 had minor fuel failure in the late 1990s; however Cm-242 is not at a low ratio in all our smear samples. For example in refuel floor samples and Chem sample sink samples, Cm-242 is as much as half of total alpha activity, whereas in more "legacy" type samples (not exposed to fresh reactor water) such as drywell basement, drywell sump, inside MSIVs, etc., Cm-242 has the lowest alpha activity or is not detected. This is despite our having negligible fuel leakage in recent years.
Tom VanderMey, CHP Principal Radiological Engineer DTE Energy, Fermi 2 734-586-1539 [email protected] wrote: ----- To: [email protected] From: [email protected] Sent by: [email protected] Date: 11/13/2012 04:12PM Subject: Re: Powernet: alpha scaling factor Zusanne, San Onofre's mixture has been aging since the mid 1980's. Our aged distributions show >50% Am-241, which grows in from the decay of Pu-241. The other major component is Cm244 (T1/2=18 years). Fresh failed fuel has ~50% Cm-242 (T1/2=163 day), which at San Onofre is now <1%. Mike Russell 949.368.7638 From: "Ziegler, Susanne E." <[email protected]> To: "'[email protected]'" <[email protected]> Date: 11/13/2012 09:47 AM Subject: Powernet: alpha scaling factor Sent by: [email protected] I am interested in typically what alpha isotopes you are seeing during your characterizations. I realize each plant has a different history of fuel damage, and cleanup. I'm am wondering if a typical ratio of Cm-242 to Pu-138 can be determined. sue Susanne Ziegler PSEG Radiation Protection Hope Creek Generating Station PO Box 236, MC H05 Hancocks Bridge, NJ 08038 856-339-5143 FAX 856-339-3336 Gadugi-working together for a common good The information contained in this e-mail, including any attachment(s), is intended solely for use by the named addressee(s). If you are not the intended recipient, or a person designated as responsible for delivering such messages to the intended recipient, you are not authorized to disclose, copy, distribute or retain this message, in whole or in part, without written authorization from PSEG. This e-mail may contain proprietary, confidential or privileged information. If you have received this message in error, please notify the sender immediately. This notice is included in all e-mail messages leaving PSEG. Thank you for your cooperation. ----------------------------------- Powernet - a service of the Health Physics Society Power Reactor Section Powernet archives at http://www.mail-archive.com/[email protected]/ Reply to: [email protected] If Questions, contact Mike Russell, CHP at [email protected]
