Susquehanna
We have a number of computer points for thermal
power. They include an instantaneous value, 1 minute average, 15 minute
average, 1 hr and every even hour averages upto 12 hours. The
feedwater flow is averaged over 10 minutes. If power exceeds our license
limit on the 1 minute average the operators enter an off normal procedure.
Reporting is based on the magnitude and duration of the overpower. No
changes were made based on the RIS.
Question to Reactor Engineering
Supervisors with respect to RIS 2007-021.
What type of time averaged values are used in your calorimetric program
(e.g. 1 minute average, 5 minute average, etc)? What type of time
averaging is used for either feed flow or steam flow which feeds your
calorimetric program? Which of the time average calorimetric values are
used to ensure compliance with your licensed thermal power limitations and the
intent of RIS 2007-021? Have you made changes to your calorimetric procedures or
methods as a result of the RIS? Is "Steady State" in reference to licensed
thermal power defined at your plant?
Michael J.
Fanguy
Nuclear Analysis &
Fuel
Lead Reactor Engineer
Surry Power Station
Email: Michael.Fanguy@Dom.com
Phone: 757-365-2155
Pager #: 3453
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