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On 11/11/07 at 1639, the High Pressure Coo … On 11/11/07 at 1639, the High Pressure Coolant Injection (HPCI) system was declared inoperable. The quarterly HPCI System Valve In-Service Surveillance was in progress. During the performance of the surveillance, the Suppression Chamber supply check valve was unable to be cycled open in accordance with the surveillance procedure.</br>Loss of the HPCI system is reportable under 10CFR50.72(b)(3)(v) as loss of a single train safety system required to mitigate the consequences of an accident. The plant is stable in Operational Condition 2, no other Emergency Core Cooling or Safety Related systems are inoperable and plant start-up activities are in progress.</br>The licensee notified the NRC Resident Inspector and the Lower Alloways Creek Township.</br>* * * RETRACTION AT 1532 ON 12/4/2007 FROM MICHAEL REED TO MARK ABRAMOVITZ * * *</br>Further investigation revealed that the existing steps of the controlling surveillance procedure did not consistently equalize pressure across the HPCI suction check valve and therefore did not establish adequate test conditions. The surveillance procedure was revised to ensure adequate test conditions were established and the valve was successfully stroked. Evaluation of the initial assessment of operability determined that the suction check valve was not inoperable. Therefore the HPCI system was also not inoperable as initially declared and continued to be able to perform its safety function. </br>Based on this additional information, the associated non-emergency 8-hour notification made on November 11, 2007, is retracted.</br>The licensee notified the NRC Resident Inspector and the Lower Alloways Creek Township.</br>Notified the R1DO (Barkley).eek Township.
Notified the R1DO (Barkley). +
21:39:00, 11 November 2007 +
20:06:00, 11 November 2007 +
21:39:00, 11 November 2007 +
On 11/11/07 at 1639, the High Pressure Coo … On 11/11/07 at 1639, the High Pressure Coolant Injection (HPCI) system was declared inoperable. The quarterly HPCI System Valve In-Service Surveillance was in progress. During the performance of the surveillance, the Suppression Chamber supply check valve was unable to be cycled open in accordance with the surveillance procedure.</br>Loss of the HPCI system is reportable under 10CFR50.72(b)(3)(v) as loss of a single train safety system required to mitigate the consequences of an accident. The plant is stable in Operational Condition 2, no other Emergency Core Cooling or Safety Related systems are inoperable and plant start-up activities are in progress.</br>The licensee notified the NRC Resident Inspector and the Lower Alloways Creek Township.</br>* * * RETRACTION AT 1532 ON 12/4/2007 FROM MICHAEL REED TO MARK ABRAMOVITZ * * *</br>Further investigation revealed that the existing steps of the controlling surveillance procedure did not consistently equalize pressure across the HPCI suction check valve and therefore did not establish adequate test conditions. The surveillance procedure was revised to ensure adequate test conditions were established and the valve was successfully stroked. Evaluation of the initial assessment of operability determined that the suction check valve was not inoperable. Therefore the HPCI system was also not inoperable as initially declared and continued to be able to perform its safety function. </br>Based on this additional information, the associated non-emergency 8-hour notification made on November 11, 2007, is retracted.</br>The licensee notified the NRC Resident Inspector and the Lower Alloways Creek Township.</br>Notified the R1DO (Barkley).eek Township.
Notified the R1DO (Barkley). +
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00:00:00, 4 December 2007 +
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21:39:00, 11 November 2007 +
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