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ENS 56471
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Category
ENS Notification  and Power Reactor
CFR
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>At 0246 CDT on April 17, 2023, it was discovered that the single train low pressure core spray system was inoperable. Due to this inoperability, the system was in a condition that could have prevented the fulfillment of a safety function; therefore, this condition is being reported as an eight-hour, non-emergency notification per 10 CFR 50.72(b)(3)(v). All other emergency core cooling systems remained operable during this time period.</br>There was no impact on the health and safety of the public or plant personnel. The NRC Resident Inspector has been notified.</br>The following additional information was obtained from the licensee in accordance with Headquarters Operations Officers Report Guidance:</br>LaSalle Unit 1 is in a 7 day limiting condition for operation. a 7 day limiting condition for operation.  +
Discovered date
07:46:00, 17 April 2023  +
ENS id number
56,471  +
Emergency class
Non Emergency +
Entered date
09:37:00, 17 April 2023  +
Event date
07:46:00, 17 April 2023  +
Event description
The following information was provided by … The following information was provided by the licensee via email:</br>At 0246 CDT on April 17, 2023, it was discovered that the single train low pressure core spray system was inoperable. Due to this inoperability, the system was in a condition that could have prevented the fulfillment of a safety function; therefore, this condition is being reported as an eight-hour, non-emergency notification per 10 CFR 50.72(b)(3)(v). All other emergency core cooling systems remained operable during this time period.</br>There was no impact on the health and safety of the public or plant personnel. The NRC Resident Inspector has been notified.</br>The following additional information was obtained from the licensee in accordance with Headquarters Operations Officers Report Guidance:</br>LaSalle Unit 1 is in a 7 day limiting condition for operation. a 7 day limiting condition for operation.  +
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ENS 56471 +, ENS 56471 +, ENS 56471 +, ENS 56471 +, ENS 56471 +, ENS 56471 +, ENS 56471 +, ENS 56471 +, ENS 56471 +, ENS 56471 +, ENS 56471 +, ENS 56471 +, ENS 56471 +  and ENS 56471 +
Initial power
100  +
Initial reactor mode
Power Operation +
LER
05000373/LER-2023-001, Low Pressure Core Spray Inoperable Due to Minimum Flow Valve Flow Pressure Switch Failure +  and Low Pressure Core Spray Inoperable Due to Minimum Flow Valve Flow Pressure Switch Failure +
Last update date
00:00:00, 17 April 2023  +
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>.
11:30:27, 19 April 2023  +
NRC officer
Sam Colvard +
Notification date
09:37:00, 17 April 2023  +
Originated by
Erik Thompson +
Reactor critical
true  +
Reactor scram
false  +
Reactor type
GE-5 +
Region
NRC Region 3 +
Reporting criterion
10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident +
Reporting time
0.0771 d (1.85 hours, 0.011 weeks, 0.00253 months)  +
Site
LaSalle +
Start date
07:46:00, 17 April 2023  +
State
Illinois +
System
Core Spray +  and Emergency Core Cooling System +
Title
Single Train of LOW Pressure Core Spray 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/2023/20230419en.html#en56471  +
Unit
1  +
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