ENS 40556: Difference between revisions
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| event date = 02/29/2004 MST | | event date = 02/29/2004 MST | ||
| last update date = 02/29/2004 | | last update date = 02/29/2004 | ||
| title = Boric Acid Residue Found | | title = Boric Acid Residue Found on Pressurizer Heater Sleeve | ||
| event text = The following event description is based on information currently available. If through subsequent reviews of this event, additional Information is identified that is pertinent to this event or alters the information being provided at this time, a follow-up notification will be made via the ENS or under the reporting requirements of 10CFR50.73. | | event text = The following event description is based on information currently available. If through subsequent reviews of this event, additional Information is identified that is pertinent to this event or alters the information being provided at this time, a follow-up notification will be made via the ENS or under the reporting requirements of 10CFR50.73. | ||
On February 29, 2004, at approximately 05:21 Mountain Standard Time (MST) engineering personnel performing preplanned visual examinations of reactor coolant system (RCS) piping in accordance with procedure requirements discovered boric acid residue on the A03 pressurizer heater sleeve. The heater sleeve is an alloy 600 penetration. The visual observation was characterized as a small white buildup of boron residue around the heater sleeve as the sleeve enters the pressurizer bottom head. There does not appear to be residue running down the outside of the sleeve. There were no signs of dripping, spraying, puddles of liquid, or liquid running down the nozzle or pressurizer. The residue appeared dry. | On February 29, 2004, at approximately 05:21 Mountain Standard Time (MST) engineering personnel performing preplanned visual examinations of reactor coolant system (RCS) piping in accordance with procedure requirements discovered boric acid residue on the A03 pressurizer heater sleeve. The heater sleeve is an alloy 600 penetration. The visual observation was characterized as a small white buildup of boron residue around the heater sleeve as the sleeve enters the pressurizer bottom head. There does not appear to be residue running down the outside of the sleeve. There were no signs of dripping, spraying, puddles of liquid, or liquid running down the nozzle or pressurizer. The residue appeared dry. | ||
Latest revision as of 22:24, 1 March 2018
| Where | |
|---|---|
Palo Verde  Arizona (NRC Region 4) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded | |
| LER: | 05000530/LER-2004-001 |
| Time - Person (Reporting Time:+4.77 h0.199 days <br />0.0284 weeks <br />0.00653 months <br />) | |
| Opened: | Steve Banks 11:46 Feb 29, 2004 |
| NRC Officer: | Bill Gott |
| Last Updated: | Feb 29, 2004 |
| 40556 - NRC Website
| |