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ENS 57199
Show incoming properties 
Category
ENS Notification  and Power Reactor
CFR
10 CFR 50.72(b)(3)(v)(B), Loss of Safety Function - Remove Residual Heat +, 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident +  and 10 CFR 50.72#b3v +
Current power
100  +
Current reactor mode
Power Operation +
Description
The following information was provided by … The following information was provided by the licensee via email:</br>This condition is being reported in accordance with 10 CFR50.72(b)(3)(v) as a condition that could have prevented fulfillment of a safety function. On 6/27/2024 at 2158 CDT, (technical specification) TS 3.5.1 condition 'D' (both divisions of (low pressure coolant injection) LPCI inoperable) was entered for surveillance testing. On 6/28/2024 at 0110 CDT, MO-2012 (residual heat removal) RHR Division 1 LPCI injection outboard valve was attempted to be cycled. It was discovered to be inoperable resulting in an inability to exit TS 3.5.1 'D'. Initial review of this condition for immediate reportability under 50.72(b)(3)(v) event or a condition that could have prevented fulfillment of a safety function, concluded the condition was not reportable based on the operability of other emergency core cooling systems (ECCS). Specifically, core spray and high pressure coolant injection were both operable to perform the function of emergency core cooling. Subsequent reviews determined that the reportability decision under 50.72(b)(3)(v) as an event or condition that could have prevented fulfillment of a safety function should be based on the safety function at the LPCI system level, rather than at the ECCS system level. The decision to report the inoperability of LPCI under 50.72(b)(3)(v) was made at 1030 CDT on 6/28/2024. The NRC Resident Inspector has been notified. NRC Resident Inspector has been notified.  +
Discovered date
06:10:00, 28 June 2024  +
Emergency class
Non Emergency +
Entered date
16:28:00, 28 June 2024  +
Event date
06:10:00, 28 June 2024  +
Event description
The following information was provided by … The following information was provided by the licensee via email:</br>This condition is being reported in accordance with 10 CFR50.72(b)(3)(v) as a condition that could have prevented fulfillment of a safety function. On 6/27/2024 at 2158 CDT, (technical specification) TS 3.5.1 condition 'D' (both divisions of (low pressure coolant injection) LPCI inoperable) was entered for surveillance testing. On 6/28/2024 at 0110 CDT, MO-2012 (residual heat removal) RHR Division 1 LPCI injection outboard valve was attempted to be cycled. It was discovered to be inoperable resulting in an inability to exit TS 3.5.1 'D'. Initial review of this condition for immediate reportability under 50.72(b)(3)(v) event or a condition that could have prevented fulfillment of a safety function, concluded the condition was not reportable based on the operability of other emergency core cooling systems (ECCS). Specifically, core spray and high pressure coolant injection were both operable to perform the function of emergency core cooling. Subsequent reviews determined that the reportability decision under 50.72(b)(3)(v) as an event or condition that could have prevented fulfillment of a safety function should be based on the safety function at the LPCI system level, rather than at the ECCS system level. The decision to report the inoperability of LPCI under 50.72(b)(3)(v) was made at 1030 CDT on 6/28/2024. The NRC Resident Inspector has been notified. NRC Resident Inspector has been notified.  +
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>.
ENS 57199 +, ENS 57199 +, ENS 57199 +, ENS 57199 +, ENS 57199 +, ENS 57199 +, ENS 57199 +, ENS 57199 +, ENS 57199 +, ENS 57199 +, ENS 57199 +, ENS 57199 +, ENS 57199 +, ENS 57199 +  and ENS 57199 +
Initial power
100  +
Initial reactor mode
Power Operation +
Last update date
00:00:00, 1 July 2024  +
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>.
00:05:51, 4 July 2024  +
NRC officer
Robert A. Thompson +
Notification date
16:28:00, 28 June 2024  +
Originated by
Brian Olson +
Reactor critical
true  +
Reactor scram
false  +
Reactor type
GE-3 +
Region
NRC Region 3 +
Reporting criterion
10 CFR 50.72(b)(3)(v)(B), Loss of Safety Function - Remove Residual Heat +  and 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident +
Reporting time
0.429 d (10.3 hours, 0.0613 weeks, 0.0141 months)  +
Site
Monticello +
Start date
06:10:00, 28 June 2024  +
State
Minnesota +
System
High Pressure Coolant Injection +, Core Spray +  and Emergency Core Cooling System +
TS
TS-3.5.1 +
Title
Both Divisions of Lpci Inoperable  +
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.
https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2024/20240702en.html#en57199  +
Unit
1  +
 
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