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This non-emergency 8-hour report is pursua … This non-emergency 8-hour report is pursuant, to 10CFR50.72(b)(3). On 05/06/05 at 21:36, (High Pressure Coolant Injection) HPCI was declared inoperable based on a degraded pipe restraint and a degraded snubber associated with the Unit 3 HPCI discharge piping. The degraded pipe restraint and snubber were discovered on 05/05/05 at 17:05. </br>The subsequent engineering evaluation determined that HPCI is inoperable until the supports are repaired. Reactor operation is unaffected and Unit 3 remains at 100% power. The inoperability of the HPCI system places the plant in a 14 day Limiting Condition of Operation, per (Technical Specification) TS 3.5.1. Further investigation of the cause is in progress.</br>The licensee notified the NRC Resident Inspector.</br>* * * RETRACTION ON 6/14/05 AT 1659 EDT FROM D. FOSS TO A. COSTA * * *</br>The purpose of this notification is to retract a previous report made on 5/7/05 at 0016 hours (EN# 41676). Notification of this issue to the NRC was initially made as a result of declaring the Unit 3 High Pressure Coolant Injection (HPCI) system inoperable on 5/6/05 at 2136 hours. This declaration was based on a preliminary Engineering evaluation concerning degraded pipe supports associated with the Unit 3 HPCI discharge piping.</br>Since the initial report, it was determined that two HPCI discharge pipe supports required additional Engineering analysis to assess the as-found condition of the pipe supports. One support (S300) had loose base plate bolts while the other support (S46) had cracked welds. Engineering has determined that the S46 HPCI pipe support in the as-found condition was capable of performing its design function. A piping stress analysis was performed to address the as-found condition of the S300 pipe support. This analysis determined that the HPCI system would remain operable with the S300 support out of service. Therefore, during the period of pipe support degradation, the HPCI system was considered as available and capable of performing its safety function.</br>Maintenance was planned and repairs were performed to HPCI system pipe supports. These repairs were complete and the HPCI system was restored to full compliance on 5/9/05 by approximately 0430 hours. A root cause evaluation is being performed in accordance with the Corrective Action Program (CR 332355).</br>The NRC resident has been informed of the retraction.</br>Notified R1DO (Krohn). of the retraction.
Notified R1DO (Krohn).
01:36:00, 7 May 2005 +
41,676 +
00:16:00, 7 May 2005 +
01:36:00, 7 May 2005 +
This non-emergency 8-hour report is pursua … This non-emergency 8-hour report is pursuant, to 10CFR50.72(b)(3). On 05/06/05 at 21:36, (High Pressure Coolant Injection) HPCI was declared inoperable based on a degraded pipe restraint and a degraded snubber associated with the Unit 3 HPCI discharge piping. The degraded pipe restraint and snubber were discovered on 05/05/05 at 17:05. </br>The subsequent engineering evaluation determined that HPCI is inoperable until the supports are repaired. Reactor operation is unaffected and Unit 3 remains at 100% power. The inoperability of the HPCI system places the plant in a 14 day Limiting Condition of Operation, per (Technical Specification) TS 3.5.1. Further investigation of the cause is in progress.</br>The licensee notified the NRC Resident Inspector.</br>* * * RETRACTION ON 6/14/05 AT 1659 EDT FROM D. FOSS TO A. COSTA * * *</br>The purpose of this notification is to retract a previous report made on 5/7/05 at 0016 hours (EN# 41676). Notification of this issue to the NRC was initially made as a result of declaring the Unit 3 High Pressure Coolant Injection (HPCI) system inoperable on 5/6/05 at 2136 hours. This declaration was based on a preliminary Engineering evaluation concerning degraded pipe supports associated with the Unit 3 HPCI discharge piping.</br>Since the initial report, it was determined that two HPCI discharge pipe supports required additional Engineering analysis to assess the as-found condition of the pipe supports. One support (S300) had loose base plate bolts while the other support (S46) had cracked welds. Engineering has determined that the S46 HPCI pipe support in the as-found condition was capable of performing its design function. A piping stress analysis was performed to address the as-found condition of the S300 pipe support. This analysis determined that the HPCI system would remain operable with the S300 support out of service. Therefore, during the period of pipe support degradation, the HPCI system was considered as available and capable of performing its safety function.</br>Maintenance was planned and repairs were performed to HPCI system pipe supports. These repairs were complete and the HPCI system was restored to full compliance on 5/9/05 by approximately 0430 hours. A root cause evaluation is being performed in accordance with the Corrective Action Program (CR 332355).</br>The NRC resident has been informed of the retraction.</br>Notified R1DO (Krohn). of the retraction.
Notified R1DO (Krohn).
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100 +
00:00:00, 14 June 2005 +
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>.
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00:16:00, 7 May 2005 +
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01:36:00, 7 May 2005 +
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