Browse wiki
Jump to navigation
Jump to search
At approximately 0800, lost all FMB contro … At approximately 0800, lost all FMB control room monitors associated with Digital Control System (DCS). Several valves in UF6 process failed in unexpected position. No release and no exposures. System immediately put in a safe configuration. Root cause has begun and system will be kept in safe configuration for now (not restarted) until cause determined and corrected. This is a Courtesy Notification.</br>The NRC Resident Inspector and the NRC Regional Project Manager (Pelchat) were informed of this information call by the licensee.</br>* * * UPDATE FROM PARSCALE TO HUFFMAN AT 1146 EDT ON 7/11/07 * * *</br>The cause has been determined to be attributable to a UPS failure. This UPS failure resulted in a re-initialization of system configuration which, upon power restoration, caused process valves to move to the system's default configuration for the subsequent re-start mode. This default configuration was not correct for the state the system was in at the time of the re-initialization. The programming logic for valve alignment in the event of a re-initialization has since been corrected. There was no release and no exposure, and the system was immediately put in a safe configuration. The root cause is continuing. This is an update to the Courtesy Notification made on 6/18/07.</br>Notified R2DO (Hopper), FSME (Burgess).7.
Notified R2DO (Hopper), FSME (Burgess). +
13:00:00, 18 June 2007 +
43,429 +
14:31:00, 18 June 2007 +
13:00:00, 18 June 2007 +
At approximately 0800, lost all FMB contro … At approximately 0800, lost all FMB control room monitors associated with Digital Control System (DCS). Several valves in UF6 process failed in unexpected position. No release and no exposures. System immediately put in a safe configuration. Root cause has begun and system will be kept in safe configuration for now (not restarted) until cause determined and corrected. This is a Courtesy Notification.</br>The NRC Resident Inspector and the NRC Regional Project Manager (Pelchat) were informed of this information call by the licensee.</br>* * * UPDATE FROM PARSCALE TO HUFFMAN AT 1146 EDT ON 7/11/07 * * *</br>The cause has been determined to be attributable to a UPS failure. This UPS failure resulted in a re-initialization of system configuration which, upon power restoration, caused process valves to move to the system's default configuration for the subsequent re-start mode. This default configuration was not correct for the state the system was in at the time of the re-initialization. The programming logic for valve alignment in the event of a re-initialization has since been corrected. There was no release and no exposure, and the system was immediately put in a safe configuration. The root cause is continuing. This is an update to the Courtesy Notification made on 6/18/07.</br>Notified R2DO (Hopper), FSME (Burgess).7.
Notified R2DO (Hopper), FSME (Burgess). +
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, 11 July 2007 +
SUB-526 +
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>.
23:32:08, 24 November 2018 +
14:31:00, 18 June 2007 +
0.0633 d (1.52 hours, 0.00905 weeks, 0.00208 months) +
13:00:00, 18 June 2007 +
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.