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Pursuant to the reporting requirements of … Pursuant to the reporting requirements of Item 2.H of the (Vogtle Electric Generating Plant) VEGP Unit 1 and Unit 2 operating licenses, (Southern Nuclear Company) SNC is notifying the NRC of overpower events in violation of the maximum core power level of 3565 MWt authorized by Item 2.C.(1) of the licenses. </br>Based on a review of operating data dating back to January 2, 2002, SNC has identified occurrences where the daily average core power exceeded 3565 MWt by as much as 0.4 MWt for Unit 1 and 0.9 MWt for Unit 2.</br>The temperature signal from the steam generator blowdown, used as input into the computer calorimetric, was determined to be out of calibration in each unit. The licensee is evaluating this situation for a causal effect.</br>The licensee notified the NRC Resident Inspector.</br>* * * UPDATE AT 1434 EDT ON 9/2/05 FROM STEVE WALDRUP TO S. SANDIN * * *</br>The licensee is retracting this report based on the following:</br>On 8/19/05, VEGP notified the NRC Operations Center (Notification # 41934) of overpower events in violation of the maximum core power level of 3565 MWt authorized by Item 2.C.(1) of the Unit 1 and Unit 2. operating licenses.</br>The non-conservative measurement of a plant parameter used in the calorimetric heat balance resulted in underestimating the calculated reactor thermal power. Correcting the calculated reactor thermal power for non-conservatism resulted in the conclusion that the licensed power level was exceeded. This led to the notification described above.</br>Further engineering evaluation identified conservatisms in the heat balance calculation that were demonstrated to more than offset the non-conservatism discussed above. It was therefore concluded that the maximum core power level did not exceed the power level authorized by Item 2.C.(1) of Unit 1 and Unit 2 operating licenses.</br>The licensee notified the NRC Resident Inspector. Notified R2DO (Mark Lesser).t Inspector. Notified R2DO (Mark Lesser). +
04:00:00, 19 August 2005 +
41,934 +
20:32:00, 19 August 2005 +
04:00:00, 19 August 2005 +
Pursuant to the reporting requirements of … Pursuant to the reporting requirements of Item 2.H of the (Vogtle Electric Generating Plant) VEGP Unit 1 and Unit 2 operating licenses, (Southern Nuclear Company) SNC is notifying the NRC of overpower events in violation of the maximum core power level of 3565 MWt authorized by Item 2.C.(1) of the licenses. </br>Based on a review of operating data dating back to January 2, 2002, SNC has identified occurrences where the daily average core power exceeded 3565 MWt by as much as 0.4 MWt for Unit 1 and 0.9 MWt for Unit 2.</br>The temperature signal from the steam generator blowdown, used as input into the computer calorimetric, was determined to be out of calibration in each unit. The licensee is evaluating this situation for a causal effect.</br>The licensee notified the NRC Resident Inspector.</br>* * * UPDATE AT 1434 EDT ON 9/2/05 FROM STEVE WALDRUP TO S. SANDIN * * *</br>The licensee is retracting this report based on the following:</br>On 8/19/05, VEGP notified the NRC Operations Center (Notification # 41934) of overpower events in violation of the maximum core power level of 3565 MWt authorized by Item 2.C.(1) of the Unit 1 and Unit 2. operating licenses.</br>The non-conservative measurement of a plant parameter used in the calorimetric heat balance resulted in underestimating the calculated reactor thermal power. Correcting the calculated reactor thermal power for non-conservatism resulted in the conclusion that the licensed power level was exceeded. This led to the notification described above.</br>Further engineering evaluation identified conservatisms in the heat balance calculation that were demonstrated to more than offset the non-conservatism discussed above. It was therefore concluded that the maximum core power level did not exceed the power level authorized by Item 2.C.(1) of Unit 1 and Unit 2 operating licenses.</br>The licensee notified the NRC Resident Inspector. Notified R2DO (Mark Lesser).t Inspector. Notified R2DO (Mark Lesser). +
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