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ENS 43240
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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#b3v +
Current power
100  +
Current reactor mode
Power Operation +
Description
A pinhole leak was discovered on B train E … A pinhole leak was discovered on B train Essential Service Water (ESW) system piping while preparing the pipe surface for non-destructive examination. Control room personnel were notified of the leak at 1435. B ESW was immediately declared inoperable. At the time of control room notification, surveillance testing on the Turbine Driven Auxiliary Feedwater Pump (TDAFP) was in progress. This surveillance testing made the TDAFP inoperable and non-functional. The surveillance activities were terminated and the TDAFP was returned to operable status at 1438.</br>B ESW is the safety related water source for B train of auxiliary feedwater (AFW). For the three minute period between notification of the pinhole leak until the TDAFP was restored to operable status, there were two auxiliary feed pumps inoperable. This met the conditions for entry into T/S LCO Action 3.7.5.D which requires a plant shut down to Hot Standby within 6 hours. This action was exited when the TDAFP surveillance testing was terminated. Additionally, with 2 of 3 auxiliary feedwater pumps non-functional for 3 minutes, there was a condition which could have prevented fulfillment of a safety function for those 3 minutes.</br>The licensee notified the NRC Resident Inspector.</br>* * * UPDATE AT 1555 EDT ON 5/4/07 FROM KEITH DUNCAN TO S. SANDIN * * *</br>The licensee provided the following information as the basis for retracting this report:</br>On March 14, 2007, (Event Number 43240) Callaway Plant reported a condition that, at the time, was believed to be a condition which could have prevented fulfillment of a safety function. At that time the 'A' motor driven auxiliary feedwater pump (MDAPP) was operable, the turbine driven auxiliary feedwater pump was not functional because of a surveillance test in progress. The 'B' MDAFP was presumed to be non-functional because of a pinhole leak in the 'B' train essential service water (ESW) system piping. 'B' ESW is the safety related water source for the 'B' MDAFP. </br>Subsequent inspection, non-destructive examination, analysis and evaluation of the 'B' train ESW piping determined that the structural integrity of the pipe was retained. 'B' ESW pump was able to provide the required flow to the train. 'B' train ESW was functional with the pinhole leak. With the 'B' ESW train functional, the 'B' train of auxiliary feedwater had its emergency water source. The auxiliary feedwater system would have been able to fulfill its safety function. This event is not reportable per 10CFR50.72(b)(3)(v).</br>The licensee will inform the NRC Resident Inspector. Notified R4DO (O'Keefe).ident Inspector. Notified R4DO (O'Keefe).  
Discovered date
19:35:00, 14 March 2007  +
ENS
ENS 43240 +
ENS id number
43,240  +
Emergency class
Non Emergency +
Entered date
22:22:00, 14 March 2007  +
Event date
19:35:00, 14 March 2007  +
Event description
A pinhole leak was discovered on B train E … A pinhole leak was discovered on B train Essential Service Water (ESW) system piping while preparing the pipe surface for non-destructive examination. Control room personnel were notified of the leak at 1435. B ESW was immediately declared inoperable. At the time of control room notification, surveillance testing on the Turbine Driven Auxiliary Feedwater Pump (TDAFP) was in progress. This surveillance testing made the TDAFP inoperable and non-functional. The surveillance activities were terminated and the TDAFP was returned to operable status at 1438.</br>B ESW is the safety related water source for B train of auxiliary feedwater (AFW). For the three minute period between notification of the pinhole leak until the TDAFP was restored to operable status, there were two auxiliary feed pumps inoperable. This met the conditions for entry into T/S LCO Action 3.7.5.D which requires a plant shut down to Hot Standby within 6 hours. This action was exited when the TDAFP surveillance testing was terminated. Additionally, with 2 of 3 auxiliary feedwater pumps non-functional for 3 minutes, there was a condition which could have prevented fulfillment of a safety function for those 3 minutes.</br>The licensee notified the NRC Resident Inspector.</br>* * * UPDATE AT 1555 EDT ON 5/4/07 FROM KEITH DUNCAN TO S. SANDIN * * *</br>The licensee provided the following information as the basis for retracting this report:</br>On March 14, 2007, (Event Number 43240) Callaway Plant reported a condition that, at the time, was believed to be a condition which could have prevented fulfillment of a safety function. At that time the 'A' motor driven auxiliary feedwater pump (MDAPP) was operable, the turbine driven auxiliary feedwater pump was not functional because of a surveillance test in progress. The 'B' MDAFP was presumed to be non-functional because of a pinhole leak in the 'B' train essential service water (ESW) system piping. 'B' ESW is the safety related water source for the 'B' MDAFP. </br>Subsequent inspection, non-destructive examination, analysis and evaluation of the 'B' train ESW piping determined that the structural integrity of the pipe was retained. 'B' ESW pump was able to provide the required flow to the train. 'B' train ESW was functional with the pinhole leak. With the 'B' ESW train functional, the 'B' train of auxiliary feedwater had its emergency water source. The auxiliary feedwater system would have been able to fulfill its safety function. This event is not reportable per 10CFR50.72(b)(3)(v).</br>The licensee will inform the NRC Resident Inspector. Notified R4DO (O'Keefe).ident Inspector. Notified R4DO (O'Keefe).  
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ENS 43240 +, ENS 43240 +, ENS 43240 +, ENS 43240 +, ENS 43240 +, ENS 43240 +, ENS 43240 +, ENS 43240 +, ENS 43240 +, ENS 43240 +, ENS 43240 +, ENS 43240 +, ENS 43240 +, ENS 43240 +  and ENS 43240 +
Hours
6.944444e-5 d (0.00167 hours, 9.920635e-6 weeks, 2.283e-6 months)  +
Initial power
100  +
Initial reactor mode
Power Operation +
Last update date
00:00:00, 4 May 2007  +
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>.
02:16:45, 2 March 2018  +
NRC officer
Jason Kozal +
Notification date
22:22:00, 14 March 2007  +
Originated by
Mark Covey +
Reactor critical
true  +
Reactor scram
false  +
Reactor type
Westinghouse PWR 4-Loop +
Region
NRC Region 4 +
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
0.116 d (2.78 hours, 0.0165 weeks, 0.00381 months)  +
Site
Callaway +
Start date
19:35:00, 14 March 2007  +
State
Missouri +
System
Service water +  and Auxiliary Feedwater +
Title
Two Out of Three Auxiliary Feedwater Pumps Out of Service  +
Topic
Non-Destructive Examination +
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/2007/20070507en.html#en43240  +
Unit
1  +
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