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The 'A' Reactor Feed Pump controller faile … The 'A' Reactor Feed Pump controller failed downscale causing reactor water level to lower. Feed pump was manually tripped as reactor water level passed through 20 inches (Narrow Range) in an attempt to stabilize level.</br>Reactor scrammed on Level 3 (11.4") as designed. Mode switch placed in Shutdown. Lowest level observed was -25". All control rods fully inserted. No ECCS initiations were received and all systems responded as designed. </br>Level 3 is also a Group 3 Shutdown Cooling Isolation setpoint. No valves isolated due to them being in their SOI (system operating instructions) position 'closed' prior to the event.</br>The IC Tech group was working on the Feedwater Pump Controller at the time of the trip and could have possibly caused this situation. However, this has yet to be determined.</br>The licensee notified the NRC Resident Inspector.ensee notified the NRC Resident Inspector. +
19:15:00, 21 August 2007 +
43,584 +
16:58:00, 21 August 2007 +
19:15:00, 21 August 2007 +
The 'A' Reactor Feed Pump controller faile … The 'A' Reactor Feed Pump controller failed downscale causing reactor water level to lower. Feed pump was manually tripped as reactor water level passed through 20 inches (Narrow Range) in an attempt to stabilize level.</br>Reactor scrammed on Level 3 (11.4") as designed. Mode switch placed in Shutdown. Lowest level observed was -25". All control rods fully inserted. No ECCS initiations were received and all systems responded as designed. </br>Level 3 is also a Group 3 Shutdown Cooling Isolation setpoint. No valves isolated due to them being in their SOI (system operating instructions) position 'closed' prior to the event.</br>The IC Tech group was working on the Feedwater Pump Controller at the time of the trip and could have possibly caused this situation. However, this has yet to be determined.</br>The licensee notified the NRC Resident Inspector.ensee notified the NRC Resident Inspector. +
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00:00:00, 21 August 2007 +
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>.
02:16:08, 2 March 2018 +
16:58:00, 21 August 2007 +
true +
-0.095 d (-2.28 hours, -0.0136 weeks, -0.00312 months) +
19:15:00, 21 August 2007 +
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