Duane, At North Anna, when we use spreadsheets for surveillance calcs. or reactivity calcs., and the spreadsheet is not a "Nuclear Quality Code", our procedures require an independent check of the results. Typically this would be a hand calculation or a spreadsheet created separately, by a different person, from the original one.
Rob McAndrew North Anna Reactor Engineering 540-894-2859 From: pwrrm@retaqs.com [mailto:pwrrm@retaqs.com] On Behalf Of Gore, Duane Sent: Monday, September 28, 2009 2:22 PM To: 'PWR Reactivity Management' Subject: [Pwrrm] Use of Spreadsheets for Surveillances
We at STP use spreadsheets to perform surveillance calculations. The results are then independently verified by a second engineer using an independently generated spreadsheet. Neither spreadsheet has been formally verified per our station Software Quality Assurance procedure. In cases where the results are used without further verification, we do properly QA the spreadsheets (usually in the cases where other groups use the spreadsheets).
Our QA department is of the opinion that at least one of these spreadsheets used for surveillances must by fully verified and documented per our station Software Quality Assurance procedure.
It would help my case if I could cite other Rae's practices with regards to the use of spreadsheets. What is the practice at your plant?
Thank you,
Duane Gore Supervisor, Reactor Engineering STPNOC
(361) 972-8909
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