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On April 16, 2001, the Prairie Island D6 e … On April 16, 2001, the Prairie Island D6 emergency diesel generator (EDG) exceeded the Allowed Outage Time (AOT) of Technical Specification 3.7.B.1, which allows one EDG to be inoperable for up to seven days.</br></br>D6 was declared out of service on April 9, 2001, for a 24-hour surveillance run. That run was terminated by operators when D6 engine 2 developed high crankcase pressure.</br></br>On April 16, 2001, Prairie Island requested a Notice of Enforcement Discretion (NOED) to extend the D6 AOT to ten days to allow completion of the necessary repair and testing to restore D6 operability. The NRC granted the NOED on April 16, 2001. D6 was repaired, tested, and declared operable on April 17, 2001.</br></br>Subsequent events dealing with D6 (and D5) will be addressed in LER 2-01-03.(and D5) will be addressed in LER 2-01-03. +
On April 16, 2001, the Prairie Island D6 e … On April 16, 2001, the Prairie Island D6 emergency diesel generator (EDG) exceeded the Allowed Outage Time (AOT) of Technical Specification 3.7.B.1, which allows one EDG to be inoperable for up to seven days.</br></br>D6 was declared out of service on April 9, 2001, for a 24-hour surveillance run. That run was terminated by operators when D6 engine 2 developed high crankcase pressure.</br></br>On April 16, 2001, Prairie Island requested a Notice of Enforcement Discretion (NOED) to extend the D6 AOT to ten days to allow completion of the necessary repair and testing to restore D6 operability. The NRC granted the NOED on April 16, 2001. D6 was repaired, tested, and declared operable on April 17, 2001.</br></br>Subsequent events dealing with D6 (and D5) will be addressed in LER 2-01-03.(and D5) will be addressed in LER 2-01-03. +
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