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During the evaluation of tornado missile v … During the evaluation of tornado missile vulnerabilities and the potential impacts to safety-related plant equipment, it was concluded that the following structures are vulnerable to tornado generated missiles:</br>All five of the Unit 1 and Unit 2 Emergency Diesel Generator (EDG) fuel oil storage tanks have ventilation pipe extending approximately 5 feet above grade. In the event that a tornado missile impact occurs on the aforementioned ventilation piping, there is a possibility that the vent lines could crimp. This could prevent the tanks from venting and inhibit the transfer of fuel oil from the main fuel oil storage tanks to the day tank. Ultimately, this causes the emergency diesels to be inoperable.</br>These conditions are reportable per 10 CFR 50.72(b)(3)(ii)(B) and 10 CFR 50.72(b)(3)(v)(D) for any event or condition that results in the nuclear power plant being in an unanalyzed condition that significantly degrades plant safety and also an event or condition that could have prevented fulfillment of a safety function needed to mitigate the consequence of an accident. This issue is being addressed in accordance with EGM-15-002, Revision 1, Enforcement Discretion for Tornado-Generated Missile Protection Noncompliance. </br>The NRC Resident Inspector has also been notified.Resident Inspector has also been notified. +
13:22:00, 30 March 2017 +
52,650 +
12:58:00, 30 March 2017 +
13:22:00, 30 March 2017 +
During the evaluation of tornado missile v … During the evaluation of tornado missile vulnerabilities and the potential impacts to safety-related plant equipment, it was concluded that the following structures are vulnerable to tornado generated missiles:</br>All five of the Unit 1 and Unit 2 Emergency Diesel Generator (EDG) fuel oil storage tanks have ventilation pipe extending approximately 5 feet above grade. In the event that a tornado missile impact occurs on the aforementioned ventilation piping, there is a possibility that the vent lines could crimp. This could prevent the tanks from venting and inhibit the transfer of fuel oil from the main fuel oil storage tanks to the day tank. Ultimately, this causes the emergency diesels to be inoperable.</br>These conditions are reportable per 10 CFR 50.72(b)(3)(ii)(B) and 10 CFR 50.72(b)(3)(v)(D) for any event or condition that results in the nuclear power plant being in an unanalyzed condition that significantly degrades plant safety and also an event or condition that could have prevented fulfillment of a safety function needed to mitigate the consequence of an accident. This issue is being addressed in accordance with EGM-15-002, Revision 1, Enforcement Discretion for Tornado-Generated Missile Protection Noncompliance. </br>The NRC Resident Inspector has also been notified.Resident Inspector has also been notified. +
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00:00:00, 30 March 2017 +
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