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At 0945 on 10/29/04, the Plant Shift Super … At 0945 on 10/29/04, the Plant Shift Superintendent was notified that NCSE/A 3972-11 did not establish the necessary moderation controls for the sump in the C-360 elevator pit to ensure that double contingency is maintained if a UF6 release occurs in the transfer room. The sump is an unfavorable geometry. The C-360 basement transfer room is small and relatively air-tight once placed in containment resulting from a UF6 release. A credible UF6 release in the Transfer Room could consume all moisture in the room and leave gaseous UF6 available to react directly with pre-existing liquids in the elevator sump. Over an extended period of time this reaction could support a uranium concentration that results in a critical configuration. The current configuration of the sump does not prevent less than an always safe slab depth of 3.5 inches of solution in the sump.</br>CORRECTIVE ACTIONS: Stop fissile operations in the C-360 transfer room until the necessary NCS controls for double contingency can be ensured for the sump in the elevator pit.</br>The regulatee has notified the NRC Resident Inspector.e has notified the NRC Resident Inspector. +
14:45:00, 29 October 2004 +
41,158 +
14:33:00, 29 October 2004 +
14:45:00, 29 October 2004 +
At 0945 on 10/29/04, the Plant Shift Super … At 0945 on 10/29/04, the Plant Shift Superintendent was notified that NCSE/A 3972-11 did not establish the necessary moderation controls for the sump in the C-360 elevator pit to ensure that double contingency is maintained if a UF6 release occurs in the transfer room. The sump is an unfavorable geometry. The C-360 basement transfer room is small and relatively air-tight once placed in containment resulting from a UF6 release. A credible UF6 release in the Transfer Room could consume all moisture in the room and leave gaseous UF6 available to react directly with pre-existing liquids in the elevator sump. Over an extended period of time this reaction could support a uranium concentration that results in a critical configuration. The current configuration of the sump does not prevent less than an always safe slab depth of 3.5 inches of solution in the sump.</br>CORRECTIVE ACTIONS: Stop fissile operations in the C-360 transfer room until the necessary NCS controls for double contingency can be ensured for the sump in the elevator pit.</br>The regulatee has notified the NRC Resident Inspector.e has notified the NRC Resident Inspector. +
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, 29 October 2004 +
GDP-1 +
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>.
23:39:56, 24 November 2018 +
14:33:00, 29 October 2004 +
-0.00833 d (-0.2 hours, -0.00119 weeks, -2.7396e-4 months) +
14:45:00, 29 October 2004 +
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.