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ENS 40652
Show incoming properties 
Category
ENS Notification  and Power Reactor
CFR
10 CFR 50.72(b)(3)(v)(A), Loss of Safety Function - Shutdown the Reactor +, 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident +  and 10 CFR 50.72#B +
Current power
93  +
Current reactor mode
Power Operation +
Description
On April 6, 2004, at 1400 CDT, Clinton Pow … On April 6, 2004, at 1400 CDT, Clinton Power Station discovered an air valve open for the Standby Liquid Control tank sparger. The open air sparger valve caused both Standby Liquid Control pumps to be inoperable due to the potential of air binding the pumps. The valve was closed, and the Standby Liquid Control is now operable. A Prompt Investigation is being commenced to determine circumstances of this open air sparger. The condition existed for approximately five weeks." </br>The system was restored at approximately 1500 on 4/6/04.</br>The Licensee notified the NRC Resident Inspector.</br>* * * UPDATE 1840 EDT ON 6/3/04 FROM ED TIEDEMANN TO S. SANDIN * * *</br>This report is retracted based on the following:</br>During further investigation, a calculation was performed to detail the air entrainment into the SLC pumps and the results show that air entrainment from the air sparger would not reduce system flow below that required by Technical Specifications. Therefore, it was determined that the system design is such that whenever the air sparge valve to the Standby Liquid Control (SLC) tank is open, the pumps remain operable and capable of performing their safety function. Thus, this occurrence (EN #40652 dated 4/6/04) was not reportable under 10CFR50.72(B)(3)(V)(A) and 10CFR50.72(B)(3)(V)(D).</br>The Licensee notified the NRC Resident Inspector.</br>Notified R3DO (Lanksbury).dent Inspector. Notified R3DO (Lanksbury).  +
Discovered date
19:00:00, 6 April 2004  +
ENS
ENS 40652 +
ENS id number
40,652  +
Emergency class
Non Emergency +
Entered date
19:47:00, 6 April 2004  +
Event date
19:00:00, 6 April 2004  +
Event description
On April 6, 2004, at 1400 CDT, Clinton Pow … On April 6, 2004, at 1400 CDT, Clinton Power Station discovered an air valve open for the Standby Liquid Control tank sparger. The open air sparger valve caused both Standby Liquid Control pumps to be inoperable due to the potential of air binding the pumps. The valve was closed, and the Standby Liquid Control is now operable. A Prompt Investigation is being commenced to determine circumstances of this open air sparger. The condition existed for approximately five weeks." </br>The system was restored at approximately 1500 on 4/6/04.</br>The Licensee notified the NRC Resident Inspector.</br>* * * UPDATE 1840 EDT ON 6/3/04 FROM ED TIEDEMANN TO S. SANDIN * * *</br>This report is retracted based on the following:</br>During further investigation, a calculation was performed to detail the air entrainment into the SLC pumps and the results show that air entrainment from the air sparger would not reduce system flow below that required by Technical Specifications. Therefore, it was determined that the system design is such that whenever the air sparge valve to the Standby Liquid Control (SLC) tank is open, the pumps remain operable and capable of performing their safety function. Thus, this occurrence (EN #40652 dated 4/6/04) was not reportable under 10CFR50.72(B)(3)(V)(A) and 10CFR50.72(B)(3)(V)(D).</br>The Licensee notified the NRC Resident Inspector.</br>Notified R3DO (Lanksbury).dent Inspector. Notified R3DO (Lanksbury).  +
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 40652 +, ENS 40652 +, ENS 40652 +, ENS 40652 +, ENS 40652 +, ENS 40652 +, ENS 40652 +, ENS 40652 +, ENS 40652 +, ENS 40652 +, ENS 40652 +, ENS 40652 +, ENS 40652 +, ENS 40652 +  and ENS 40652 +
Initial power
93  +
Initial reactor mode
Power Operation +
Last update date
00:00:00, 3 June 2004  +
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>.
22:43:09, 24 September 2017  +
NRC officer
Bill Gott +
Notification date
19:47:00, 6 April 2004  +
Originated by
William Carsky +
Reactor critical
true  +
Reactor scram
false  +
Reactor type
GE-6 +
Region
NRC Region 3 +
Reporting criterion
10 CFR 50.72(b)(3)(v)(A), Loss of Safety Function - Shutdown the Reactor +  and 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident +
Reporting time
0.0325 d (0.78 hours, 0.00464 weeks, 0.00107 months)  +
Site
Clinton +
Start date
19:00:00, 6 April 2004  +
State
Illinois +
System
Standby Liquid Control +
Title
Air Valve Misalignment Reduces Standby Liquid Control Capability  +
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.
http://www.nrc.gov/reading-rm/doc-collections/event-status/event/2004/20040604en.html#en40652  +
Unit
1  +
 
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