Duke response is similar to Tom Meek's. What are your FSAR limits (dose rates or concentration levels), and how did you come up with these numbers?
The general basis for acceptance of radioactivity concentrations in outdoor liquid holdup tanks is to show that postulated failure of the tank and its associated components would not result in radionuclide concentrations in excess of 10 CFR Part 20, Appendix B, Table 2, Column 2 at the nearest potable water supply in an unrestricted area. What is your process to monitor these tanks to make sure you comply with your FSAR requirements? Compliance is demonstrated by monthly sample analysis. Thanks, [cid:[email protected]] Senior Engineer, PE Corporate Radiation Protection Nuclear Generation Department Duke Energy Carolinas (704) 382-4496 From: [email protected] [mailto:[email protected]] On Behalf Of SCHLAPKOHL, DANIEL Sent: Wednesday, September 21, 2011 6:06 PM To: [email protected] Subject: RE: Powernet: FSAR requirements Your right Tom. You are the only one to answer my request. Thanks for replying. Dan Schlapkohl Supervisor, Radiological Operations Grand Gulf Nuclear Station 601-437-6189 [email protected] ________________________________ From: [email protected] [mailto:[email protected]] On Behalf Of Orionhp Sent: Wednesday, September 21, 2011 9:12 AM To: [email protected] Subject: Re: Powernet: FSAR requirements I noticed that you have not gotten any responses to this question. My answers are given below. They apply to the now decommissioned Trojan reactor located in Oregon. Tom Meek On 9/7/2011 11:16 AM, SCHLAPKOHL, DANIEL wrote: I have an action to change our FSAR for stored radioactivity in our CST and RWST tanks outside of the RCA. We currently have 0.5 and 10 mR/hr contact dose rate limits on these tanks. I would like to know the following; What are your FSAR limits (dose rates or concentration levels), and how did you come up with these numbers? The FSAR limits were concentration of radioactive material based on the dose to a member of the public from drinking water downstream from the plant from the total release of the tank contents due to a rupture. The dose limit to the public was used to back calculate the maximum concentration based on minimal dilution. What is your process to monitor these tanks to make sure you comply with your FSAR requirements? There were no process monitors. A sample was collected for analysis by chemistry. Thanks for your help, Dan Schlapkohl Supervisor, Radiological Operations Grand Gulf Nuclear Station 601-437-6189 [email protected]<mailto:[email protected]>
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