McGuire Unit 1 and Unit 2 may have been operating greater than design thermal power limits of 3411
MW [Megawatt] by approximately 0.08% due to discovery of non-conservative thermal power calculations. Preliminary evaluation of
Steam Generator Blow Down inputs into the thermal power calorimetric indicates a non-conservative error resulting in indicated total thermal power being approximately 0.08% lower than actual. Additional evaluations to confirm indicated power are ongoing. Power was reduced as soon as the on duty shift was made aware of the error and both Unit 1 and Unit 2 indicated thermal power is being limited to less than 99.85% to ensure actual reactor power remains less than 3411
MW.
This notification is being made pursuant to the McGuire Facility Operating License Condition 2.C.(1) Maximum Power Level.
The licensee will inform the NRC Resident Inspector.
- * * UPDATE AT 09:17 ON 4/4/2006 FROM REZA DJALI TO ABRAMOVITZ * * *
McGuire Nuclear Station is retracting event number 42446 which was reported to the NRC Operations Center on 3/23/06 at 1820. This event is now determined to be not reportable because further analyses of plant parameters, engineering margins, and actual plant power operation history indicated that neither Unit 1 nor Unit 2 exceeded 3411 megawatt thermal. The analyses and the bases for this retraction can be found under the plant corrective action program.
Notified the R2DO (Bonser). The licensee notified the NRC Resident Inspector.
