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At 1810 (Central Daylight Time) on July 14 … At 1810 (Central Daylight Time) on July 14, 2015, Browns Ferry Units 1, 2, and 3 initiated actions to commence a reactor shutdown to comply with TS (Technical Specifications) LCO 3.0.3. TS LCO 3.0.3 was entered at 1715 (Central Daylight Time) due to concurrent losses of the A and B Control Bay Chillers. This resulted in a loss of cooling to the U1 and U2 4kV Shutdown Board Rooms. Required actions for the loss of cooling to the U1 and U2 4kV Shutdown Board Rooms are to declare the electrical equipment in the 4kV Shutdown Board Rooms inoperable. The declaration of inoperability of the equipment supported by the U1 and U2 4kV Shutdown Boards resulted in TS LCO 3.0.3 for Units 1, 2, and 3. TS LCO 3.0.3 requires actions to be initiated within one hour to place the affected units in MODE 2 within 10 hours; MODE 3 within 13 hours; and MODE 4 within 37 hours. </br>This event requires a 4-hour report in accordance with 50.72(b)(2)(i), 'The initiation of any nuclear plant shutdown required by the plant's Technical Specifications.'</br>The NRC Resident Inspector has been notified.</br>Condition Report #1056829 has been initiated in the Corrective Action Program.</br>The 4kV shutdown electrical boards are required in all modes of operation.ds are required in all modes of operation. +
22:15:00, 14 July 2015 +
22:59:00, 14 July 2015 +
22:15:00, 14 July 2015 +
At 1810 (Central Daylight Time) on July 14 … At 1810 (Central Daylight Time) on July 14, 2015, Browns Ferry Units 1, 2, and 3 initiated actions to commence a reactor shutdown to comply with TS (Technical Specifications) LCO 3.0.3. TS LCO 3.0.3 was entered at 1715 (Central Daylight Time) due to concurrent losses of the A and B Control Bay Chillers. This resulted in a loss of cooling to the U1 and U2 4kV Shutdown Board Rooms. Required actions for the loss of cooling to the U1 and U2 4kV Shutdown Board Rooms are to declare the electrical equipment in the 4kV Shutdown Board Rooms inoperable. The declaration of inoperability of the equipment supported by the U1 and U2 4kV Shutdown Boards resulted in TS LCO 3.0.3 for Units 1, 2, and 3. TS LCO 3.0.3 requires actions to be initiated within one hour to place the affected units in MODE 2 within 10 hours; MODE 3 within 13 hours; and MODE 4 within 37 hours. </br>This event requires a 4-hour report in accordance with 50.72(b)(2)(i), 'The initiation of any nuclear plant shutdown required by the plant's Technical Specifications.'</br>The NRC Resident Inspector has been notified.</br>Condition Report #1056829 has been initiated in the Corrective Action Program.</br>The 4kV shutdown electrical boards are required in all modes of operation.ds are required in all modes of operation. +
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100 +
00:00:00, 14 July 2015 +
Modification date"Modification date" is a predefined property that corresponds to the date of the last modification of a subject and is provided by <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a>.
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22:15:00, 14 July 2015 +
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