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On 12/13/2016 at approximately 1500 (PST), … On 12/13/2016 at approximately 1500 (PST), the AREVA Nuclear Criticality Safety Staff was notified that an administrative IROFS (Item Relied On For Safety) control had not been performed in the ELO raffinate treatment process. The ELO raffinate treatment process requires the sampling of a favorable geometry process tank (IROFS 306) that is discharged to one of two sets of favorable geometry quarantine tanks. When one of the two sets of quarantine tanks is full, the input is diverted to the other set of tanks and the set that is full is recirculated and sampled for U (Uranium) concentration (IROFS 307). When both sample results have been confirmed to be acceptable the discharge valve on the transfer line may be unlocked and the raffinate solution transferred to a filter press. Sampling of the process tank was completed as required, however; the quarantine tank transfer line was unlocked and contents were pumped to the filter press without completing the required independent sampling of the quarantine tank. AREVA is conservatively reporting this plant condition under 10CFR70 Appendix A, because an accident sequence that could result in accidental nuclear criticality may not have remained highly unlikely in the absence of IROFS 307.</br>The licensee will notify NRC Region 2.07.
The licensee will notify NRC Region 2. +
23:00:00, 13 December 2016 +
52,433 +
16:12:00, 14 December 2016 +
23:00:00, 13 December 2016 +
On 12/13/2016 at approximately 1500 (PST), … On 12/13/2016 at approximately 1500 (PST), the AREVA Nuclear Criticality Safety Staff was notified that an administrative IROFS (Item Relied On For Safety) control had not been performed in the ELO raffinate treatment process. The ELO raffinate treatment process requires the sampling of a favorable geometry process tank (IROFS 306) that is discharged to one of two sets of favorable geometry quarantine tanks. When one of the two sets of quarantine tanks is full, the input is diverted to the other set of tanks and the set that is full is recirculated and sampled for U (Uranium) concentration (IROFS 307). When both sample results have been confirmed to be acceptable the discharge valve on the transfer line may be unlocked and the raffinate solution transferred to a filter press. Sampling of the process tank was completed as required, however; the quarantine tank transfer line was unlocked and contents were pumped to the filter press without completing the required independent sampling of the quarantine tank. AREVA is conservatively reporting this plant condition under 10CFR70 Appendix A, because an accident sequence that could result in accidental nuclear criticality may not have remained highly unlikely in the absence of IROFS 307.</br>The licensee will notify NRC Region 2.07.
The licensee will notify NRC Region 2. +
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, 14 December 2016 +
SNM-1227 +
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>.
22:52:51, 24 November 2018 +
16:12:00, 14 December 2016 +
0.717 d (17.2 hours, 0.102 weeks, 0.0236 months) +
23:00:00, 13 December 2016 +
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.