Kewaunee Power Station (KPS) recently identified Ag-108m in a liquid radwaste tank sample that was taken and analyzed prior to discharge. This radionuclide has never been seen before in liquid radwaste batch releases, and there are no dose factors for Ag-108m in the plant ODCM or the effluent discharge permit and dose projection software (OpenEMS), so the tank discharge is on hold pending resolution of this issue and completion of the discharge permit. There are no dose factors for Ag-108m in RG 1.109. The tank sample was recounted and confirmed the identity of the Ag-108m by the presence of its three characteristic gamma peaks in the MCA spectrum. KPS has been shutdown and permanently defueled since May of 2013. The RCS and all supporting systems have been vented, drained and abandoned. The plant is in the process of transferring all spent fuel to dry cask storage.
Has anyone else identified Ag-108m in their liquid effluents, and if yes, how did you address the dose contribution for Ag-108m in the discharge permit and dose projection ? For example, did you develop RG 1.109 equivalent dose factors for Ag-108m, based on ICRP-2 and would be willing to share them with us? Any help or information related to your experiences with Ag-108m would be greatly appreciated. Barbara J. Thompson North Anna Power Station 1022 Haley Drive Mineral, Va 23117 Superintendent Health Physics Technical Services [email protected]<mailto:[email protected]> Phone: 540-894-2638 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.
