Braidwood is Level 2 - Reference Use.
Harry L Miller Exelon Nuclear Braidwood Station 815-417-2713 [email protected] ________________________________ From: [email protected] [mailto:[email protected]] On Behalf Of Johns, Alex M. Sent: Wednesday, August 24, 2011 6:31 AM To: [email protected] Subject: Powernet: Diving procedure Salem Station has an action to "consider" making our diving procedure a Category/Level One procedure. That being in hand signed off as you go, (circle/slash) with no step skipping. The procedure is currently a Category/Level Two procedure that requires it to be at the job site for reference purposes. We would like to know what the status of your dive procedure(s) is. Thanks in advance for all your feedback. Alex Johns Salem RPS 856-339-3909 ________________________________ From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Wednesday, August 24, 2011 1:05 AM To: [email protected] Subject: Re: Powernet: NUHOMS loading failed fuel An answer from the Nuclear Fuels Engineering Department at San Onofre Nuclear Generating Station follows: First, is this Surry's first experience with drying a dry shielded canister? In other words, did the problem start with the 32-PTH? Hard to imagine the poison used for the canister would influence the rate at which gas is released. SONGS is still using a 24PT4 canister with Boral poison. We're close to finalizing the design for a 32-cell DSC with metal matrix composite (MMC) poison. We're scheduled to start using the 32PTH2 (MMC) in 2014. Our vacuum drier discharges to a poly bottle. A vacuum with HEPA filter sucks on the poly bottle. The vacuum discharges to the voluminous spent fuel building; it is not connected directly to the vent stack. If our vacuum dryer were connected directly to the vent stack, I wouldn't be surprised if we observed increases, or spiking, on the effluent monitor. I believe the HEPA filter and huge volume of the spent fuel building dilutes the gas to point of being undetectable, or barely detectable. We've dried some gory fuel in the past (all the old failed fuel is in dry storage); Operations has never told us to stop because a monitor has alarmed. Hope this helps. Jeff Carey U2/3 Health Physics Supervisor x87545/87722 Pony mail: J72 From: Erik P Simon <[email protected]> To: "[email protected]" <[email protected]> Date: 08/17/2011 04:47 AM Subject: Powernet: NUHOMS loading failed fuel Sent by: [email protected] ________________________________ Surry Power Station wants to know if anyone has had to deal with loading failed fuel into NUHOMS casks specifically the 32-PTH metal matrix type? We have recently loaded 4 of 32 assemblies with known leakers and are experiencing difficulties in vacuum drying the DSC due to high levels of Kr-85. Our current configuration has the vacuum drying system directly discharging to the Vent Stack 2 ( Vent Vent), there is no let down or delay prior to the radiation monitor. Thanks, Erik Erik Simon Health Physics Shift Supervisor Radiation Protection, Surry Power Station Dominion Generation Phone: 757-365-2672; Internal: 8-798-2672 Pager: 800-272-5643-3299; E-mail: [email protected] <mailto:[email protected]> 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. 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