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Entered date | Event description | |
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ENS 51775 | 7 March 2016 17:12:00 | During Emergency Diesel Generator (EDG) surveillance testing, the normal 480V Bus 3A supply breaker tripped open. All EDGs auto-started as per plant design. During restoration of normal power to the 480V Buses, 23 EDG output breaker opened on overcurrent. All plant systems responded as per design. There was no loss of core cooling since steam generators were coupled with an operational RCP. No other ESF (Engineered Safety Feature) equipment automatically started. The 480V Bus 3A normal supply breaker was replaced and the cause of both issues is under investigation. Indian Point Unit 2 remains in a stable MODE 5 condition with all 480V Buses energized via normal power. The NRC Resident has been informed. The licensee will inform the New York Public Service Commission. |