EPRI NP 6695 PDF

In the review process of the above report, it was noted that the calculation of CAV could be confounded by time history records of long duration containing low nondamaging acceleration. Therefore, it is necessary to standardize the method of calculating CAV to account for record length. The recommended method to standardize the CAV calculation is to window its calculation on a second-by-second basis for a given time history. If the absolute acceleration exceeds 0. A criterion is recommended for determining whether the Operating Basis Earthquake OBE has been exceeded after the occurrence of a seismic event at a nuclear power plant.

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Goltirn The NRC technical evaluation of restart readiness can be viewed at the following links: Following the earthquake, both North Anna units experienced a complete loss of offsite alternating current AC power LOOP sources to emergency electrical buses due to the actuation of transformer pressure relays from the effects of seismic action.

Contact us if a location is wrong. Here you only see the latest event report ERF send date: Drag or zoom the map to explore different areas. On August 23,an earthquake measuring 5. If hundred incidents or more are within the map, the yellow perimeter indicates from where events are excluded. The map shows a maximum of incidents. The plant exited the NOUE on the afternoon of August 24 after completing all walkdown inspections of the equipment that is most susceptible to seismic activity.

DSPIC 33EPMU PDF There was a problem providing the content you requested To demonstrate that no functional damage occurred as a result of the earthquake and that it was safe to operate the facility without undue risk to the health and safety of the public, the North Anna Power Station operator pn a number of inspections, tests, and analyses under the oversight of the United States Nuclear Regulatory Commission.

The CAL confirmed the understanding that the plant operator was not to enter Modes 1 through 4 until the NRC has completed its safety evaluation and reported its conclusion to the plant operator in writing. Cook and Palisades in Michigan. Units 1 and 2 entered cold shutdown conditions eprl August 24, and August 25,respectively. On August 29, the NRC dispatched an Augmented Inspection Team AIT to the North Anna Power Station to assess the circumstances surrounding the total loss of offsite power and dual unit reactor trip, the emergency diesel generator coolant leak and other plant equipment issues.

Sometimes there are multiple event reports, updating the rating, the event description. None of the rpri resulted in any impact to plant structures, systems, or components. Here you only see the latest event report.

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EPRI NP 6695 PDF

The map shows a maximum of incidents. Following the earthquake, both North Anna units experienced a complete loss of offsite alternating current AC power LOOP sources to emergency electrical buses due to the actuation of transformer pressure relays from the effects of seismic action. None of the aftershocks resulted in any impact to plant structures, epro, or components. The CAL confirmed the understanding that the plant operator was not to enter Modes 1 through 4 until the NRC has completed its safety evaluation and reported its conclusion to the plant operator in writing.

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Goltirn The NRC technical evaluation of restart readiness can be viewed at the following links: Following the earthquake, both North Anna units experienced a complete loss of offsite alternating current AC power LOOP sources to emergency electrical buses due to the actuation of transformer pressure relays from the effects of seismic action. Contact us if a location is wrong. Here you only see the latest event report ERF send date: Drag or zoom the map to explore different areas. On August 23,an earthquake measuring 5. If hundred incidents or more are within the map, the yellow perimeter indicates from where events are excluded. The map shows a maximum of incidents.

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