Temporary Design Changes. Tony Hathcock Duke Energy - Oconee June 20 - 23, 2010 Charlotte, NC. Types of Changes. We all have various methods that allow configuration changes at our sites. Let’s be sure we’re comparing “apples to apples”. Types of Changes.
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Temporary Design Changes
Duke Energy - Oconee
June 20 - 23, 2010Charlotte, NC
We all have various methods that allow configuration changes at our sites.
Let’s be sure we’re comparing “apples to apples”.
Maintenance Rule 10 CFR 50.65 (a)(4)
Temporary Configuration Changes:
Temporary Design Changes (Temp DCs) :
A “formal“ Engineering Change package with a scheduled removal date.
All changes must be analyzed prior to installation for their design requirements.
“The physical configuration of the plant meets design and license basis. The configuration is consistent with procedures, drawings, and other documentation”
“Temporary modifications are reviewed periodically for continued need and to identify changes that are inconsistent with the licensing and design requirements. Temporary modifications are normally removed within a refueling cycle.”
Temp DC is LATE
Five temporary design changes have been installed greater than 18 months (one refueling cycle), resulting in a red CM Performance Indicator. The indicator is based on INPO Performance criterion CM.3-6 "Temporary modifications are normally removed within a refueling cycle."
Temporary Design Changes are not to be installed without a plan for removal within one year (on-line) or one refueling cycle (outage).