ENS 52412
ENS Event | |
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21:00 Nov 30, 2016 | |
Title | Reactor Coolant Pump Breaker Cabinet Modification - Itaac Postclosure Notification |
Event Description | In accordance with 10 CFR 52.99(c)(2), Vogtle Units 3 and 4 Construction is making this notification to NRC for determining that Inspection, Test, Analysis, and Acceptance Criteria (ITAAC) 2.6.01.02.ii (ECS System Seismic Category I Equipment Design Basis Loads) for both units requires additional actions to restore its completed status. The Closure Notification for this ITAAC (NRC Index No. 580) was originally submitted on May 17, 2016 (reference ML 16138A080 and ML 16166A030).
On November 1, 2016, it was determined by the Vogtle 3&4 Contractor that modifications to the Reactor Coolant Pump (RCP) breaker (i.e., switchgear) cabinet design were required to ensure compliance with the applicable portions of IEEE 384, 'Standard Criteria for Independence of Class 1E Equipment and Circuits.' The modification involves an engineering change which adds different equipment to the RCP Breaker cabinet that function to trip the RCP. The new components were not previously qualified for use in the RCP breaker cabinet assembly. Additional seismic qualification type testing and analysis of components are being performed for the added components in the RCP breaker. Update of the Equipment Qualification Data Package and Equipment Qualification Summary Report for the RCP breaker to confirm the breaker withstands seismic design basis loads and Licensee's acceptance is in progress. The revised ITAAC Completion Notice will be submitted to the NRC once all related ITAAC activities have been completed. The licensee has notified the NRC Resident Inspector. |
Where | |
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Vogtle Georgia (NRC Region 2) | |
Reporting | |
Other Unspec Reqmnt | |
Time - Person (Reporting Time:+160.2 h6.675 days <br />0.954 weeks <br />0.219 months <br />) | |
Opened: | Kara Stacy 13:12 Dec 7, 2016 |
NRC Officer: | John Shoemaker |
Last Updated: | Dec 7, 2016 |
52412 - NRC Website
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Unit 3 | |
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Reactor critical | Not Critical |
Scram | No |
Before | Under Construction (0 %) |
After | Under Construction (0 %) |
Unit 4 | |
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Reactor critical | Not Critical |
Scram | No |
Before | Under Construction (0 %) |
After | Under Construction (0 %) |
WEEKMONTHYEARENS 549632020-10-19T08:00:00019 October 2020 08:00:00
[Table view]Other Unspec Reqmnt Update to Acceptance Criteria for Itaac ENS 548642020-08-26T04:00:00026 August 2020 04:00:00 Other Unspec Reqmnt Design Change Altered Basis for ITAAC ENS 524122016-11-30T21:00:00030 November 2016 21:00:00 Other Unspec Reqmnt Reactor Coolant Pump Breaker Cabinet Modification - Itaac Postclosure Notification ENS 419342005-08-19T04:00:00019 August 2005 04:00:00 Other Unspec Reqmnt Violation of Maximum Core Power Level Per Operating License Requirements ENS 414982005-03-16T10:40:00016 March 2005 10:40:00 Other Unspec Reqmnt Discovery of After-The Fact Emergency Condition Unusual Event 2020-08-26T04:00:00 | |