The effect is a real surface issue on the fuel. Not a camera or lighting issue.
Sent from my iPhone
On Mar 29, 2017, at 09:46, BRYSON, DAMON V <DBRYSON@scana.commailto:DBRYSON@scana.com> wrote:
TVA External Message. Please use caution when opening. That looks like some kind of weird combination of a reflection and difficulty focusing. I agree, it’s not a problem with the fuel. You might be able to eliminate this with a lighting adjustment. It is not unusual to see strange artifacts on these digital cameras. It also might be a problem with the thermals adjustment, if you have that feature on your camera. I love the thermals adjustment when doing ID verification in the core, but it can do some weird things.
Damon Bryson VC Summer Nuclear Station dbryson@scana.commailto:dbryson@scana.com 803-345-4814
From: PWRRM [mailto:pwrrm-bounces@retaqs.com] On Behalf Of Hulvey, Kimberly Dawn Sent: Tuesday, March 28, 2017 8:56 AM To: 'pwrrm@retaqs.commailto:pwrrm@retaqs.com' <pwrrm@retaqs.commailto:pwrrm@retaqs.com> Subject: [Pwrrm] question on fuel assembly bottom nozzle observation
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During our refueling outage fuel assembly inspections, we noticed something unusual in a number of periphery fuel assemblies removed from the core. We initially thought it was some type of debris and were going to attempt removal. Upon further inspection, the ‘marking’ is only seen at certain angles of viewing – it looks like a haze. Since we have seen this on more than one assembly, we don’t think it is camera distortion or camera focusing issues. When we zoon in and look at the flow holes better, we do not see any obstruction so we are currently planning to reuse these assemblies. Just curious if anyone had ever seen anything similar. Pictures are attached.
Thank you in advance for your response and help.
Kim Hulvey WBN Reactor Engineering Manager 423-365-7720 (office) 931-581-5423 (cell)
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