Browse wiki
Jump to navigation
Jump to search
The licensee provided the following inform … The licensee provided the following information about the event via facsimile (licensee test in quotes):</br>On 3/16/2005 at approximately 0540 preparations were being made to drain down the RCS. A tagout needed to be released to support aligning the RCS for drain down. The tagout was not completely released prior to opening the intermediate leg loop drain valves. When the intermediate leg loop drain valves were opened, a flow path was created which resulted in draining the RCS. The Control Room noted approximately 70 gpm mismatch between letdown flow and charging. Personnel in containment manipulating the valves discovered that water was flowing unexpectedly to a trough in containment when they went to position the last set of intermediate leg loop drain valves and they quickly isolated the flow path. The time frame that the flow path existed was approximately 10 minutes. When the Shift Manager evaluated the event for Emergency classification the flow path had been isolated. The Shift Manager was not clear on if this event met the guidance for an NOUE declaration and asked for assistance from the Outage Control Center. Corporate licensing and Emergency preparedness were contacted for additional assistance.</br>At 0930 it was decided to report the event per 50.72 (a) General Requirements even though it is not clear that the threshold for an EAL was met. Per NUREG-1022 the NRC staff does not consider actual declaration of the Emergency Class to be necessary when the event has rapidly terminated and the basis for the emergency class no longer exists.</br>The licensee stated that the threshold for an Unusual Event declaration per the Vogtle EALs is 25 gpm identified RCS leakage.</br>The NRC Resident Inspector has been notified as well as courtesy notifications to state and local authorities.</br>* * * UPDATE TO NRC (HUFFMAN) FROM LICENSEE (DORMAN) AT 10:58 ON 3/16/05 * * *</br>After further consideration, the licensee decided that this event should have been classified as an Unusual Event at the time of the occurrence. The licensee will notify the NRC Resident Inspector of this classification.Resident Inspector of this classification.
10:40:00, 16 March 2005 +
41,498 +
10:22:00, 16 March 2005 +
10:40:00, 16 March 2005 +
The licensee provided the following inform … The licensee provided the following information about the event via facsimile (licensee test in quotes):</br>On 3/16/2005 at approximately 0540 preparations were being made to drain down the RCS. A tagout needed to be released to support aligning the RCS for drain down. The tagout was not completely released prior to opening the intermediate leg loop drain valves. When the intermediate leg loop drain valves were opened, a flow path was created which resulted in draining the RCS. The Control Room noted approximately 70 gpm mismatch between letdown flow and charging. Personnel in containment manipulating the valves discovered that water was flowing unexpectedly to a trough in containment when they went to position the last set of intermediate leg loop drain valves and they quickly isolated the flow path. The time frame that the flow path existed was approximately 10 minutes. When the Shift Manager evaluated the event for Emergency classification the flow path had been isolated. The Shift Manager was not clear on if this event met the guidance for an NOUE declaration and asked for assistance from the Outage Control Center. Corporate licensing and Emergency preparedness were contacted for additional assistance.</br>At 0930 it was decided to report the event per 50.72 (a) General Requirements even though it is not clear that the threshold for an EAL was met. Per NUREG-1022 the NRC staff does not consider actual declaration of the Emergency Class to be necessary when the event has rapidly terminated and the basis for the emergency class no longer exists.</br>The licensee stated that the threshold for an Unusual Event declaration per the Vogtle EALs is 25 gpm identified RCS leakage.</br>The NRC Resident Inspector has been notified as well as courtesy notifications to state and local authorities.</br>* * * UPDATE TO NRC (HUFFMAN) FROM LICENSEE (DORMAN) AT 10:58 ON 3/16/05 * * *</br>After further consideration, the licensee decided that this event should have been classified as an Unusual Event at the time of the occurrence. The licensee will notify the NRC Resident Inspector of this classification.Resident Inspector of this classification.
Has query"Has query" is a predefined property that represents meta information (in form of a <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Subobject">subobject</a>) about individual queries and is provided by <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a>.
00:00:00, 16 March 2005 +
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>.
02:21:32, 2 March 2018 +
10:22:00, 16 March 2005 +
false +
false +
-0.0125 d (-0.3 hours, -0.00179 weeks, -4.1094e-4 months) +
10:40:00, 16 March 2005 +
URL"URL" is a <a href="/Special:Types/URL" title="Special:Types/URL">type</a> and predefined property provided by <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a> to represent URI/URL values.