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Category:Deficiency Report (per 10CFR50.55e and Part 21)
MONTHYEARCNL-17-137, Bellefonte Nuclear Plant, Unit 2, Containment Vertical Tendon (V281) Failure - Third Interim Report2017-10-30030 October 2017
Bellefonte Nuclear Plant, Unit 2, Containment Vertical Tendon (V281) Failure - Third Interim Report
CNL-17-076, Bellefonte Nuclear Plant, Unit 2 - Containment Vertical Tendon (V281) Failure - Second Interim Report2017-06-0707 June 2017
Bellefonte Nuclear Plant, Unit 2 - Containment Vertical Tendon (V281) Failure - Second Interim Report
CNL-17-004, Bellefonte, Unit 2 - Containment Vertical Tendon (V281) Failure - First Interim Report2017-01-0606 January 2017
Bellefonte, Unit 2 - Containment Vertical Tendon (V281) Failure - First Interim Report
ML12123A0892012-04-27027 April 2012
Abb, Inc., Notification of Potential Part 21 Report - Hk Circuit Breaker Studs Failed to Meet Specification
ML12094A3712012-04-0202 April 2012
Part 21 Report - Rosemount Pressure Transmitters with Nonzero Based Calibrations
ML12058A1412012-02-23023 February 2012
Part 21 Report - Rosemount Nuclear Instruments, Inc., Pressure Transmitter with Nonzero Based Calibrations
ML1030601022010-10-29029 October 2010
Notification of Potential Part 21 Transfer of Information Concerning Control Components Inc. (CCI) Drag Valves
ML1009200932010-03-25025 March 2010
10 CFR21 Notification of a Potential Weld Defect
ML0934909422009-12-10010 December 2009
Notification of Potential Part 21 Report Containment Vertical Tendon Failed
ML0907611882009-03-11011 March 2009
Part 21 Notification - Defective Hk and K-Line Circuit Breaker Tension Springs
ML0809906342008-04-0404 April 2008
Part 21 Notification Regarding Failure to Comply with the Requirements for Dedication of Commercial Grade Items
ML0713703092007-03-0707 March 2007
Velan, Inc., Piston Check Cv Information
2017-06-07
[Table view]
Category:Letter type:CNL
MONTHYEARCNL-21-082, Bellefonte Nuclear Plant, Units 1 and 2 - Withdrawal of Request for Extension of Unit 1 and Unit 2 Construction Permits (CPPR-122 and CPPR-123)2021-09-10010 September 2021
Bellefonte Nuclear Plant, Units 1 and 2 - Withdrawal of Request for Extension of Unit 1 and Unit 2 Construction Permits (CPPR-122 and CPPR-123)
CNL-21-077, Bellefonte Nuclear Plant, Units 1 and 2, Status Update and Request for Extension of Construction Permits (CPPR-122 and CPPR-123)2021-08-31031 August 2021
Bellefonte Nuclear Plant, Units 1 and 2, Status Update and Request for Extension of Construction Permits (CPPR-122 and CPPR-123)
CNL-21-045, Bellefonte Nuclear Plant, Units 1 and 2; Browns Ferry Nuclear Plant, Units 1, 2, and 3; Clinch River Nuclear Site; Sequoyah Nuclear Plant, Units 1 and 2; Watts Bar Nuclear Plant, Unit 1 and 2 - Nuclear Quality Assurance Plan, TVA-NQA-PLN82021-04-29029 April 2021
Bellefonte Nuclear Plant, Units 1 and 2; Browns Ferry Nuclear Plant, Units 1, 2, and 3; Clinch River Nuclear Site; Sequoyah Nuclear Plant, Units 1 and 2; Watts Bar Nuclear Plant, Unit 1 and 2 - Nuclear Quality Assurance Plan, TVA-NQA-PLN89-
CNL-20-072, Tennessee Valley Authority - Bellefonte Nuclear Plant (Bln), Units 1 and 2 - Status Update and Request for Extension of Unit 1 Construction Permit CPPR-1222020-08-28028 August 2020
Tennessee Valley Authority - Bellefonte Nuclear Plant (Bln), Units 1 and 2 - Status Update and Request for Extension of Unit 1 Construction Permit CPPR-122
CNL-20-039, Bellefonte Nuclear Plant, 1 & 2; Browns Ferry Nuclear Plant, 1 & 2; Clinch River Site; Sequoyah Nuclear Plant, 1 & 2; and Watts Bar Nuclear Station, Units 1 & 2 - Nuclear Quality Assurance Plan, TVA-NQA-PLN89-A, Revision 382020-04-30030 April 2020
Bellefonte Nuclear Plant, 1 & 2; Browns Ferry Nuclear Plant, 1 & 2; Clinch River Site; Sequoyah Nuclear Plant, 1 & 2; and Watts Bar Nuclear Station, Units 1 & 2 - Nuclear Quality Assurance Plan, TVA-NQA-PLN89-A, Revision 38
CNL-19-043, Bellefont Nuclear Plant, Units 1 & 2; Browns Ferry Nuclear Plan, Units 1, 2 & 3; Clinch River Nuclear Site; Sequoyah Nuclear Plant, Units 1 & 2; and Watts Bar Nuclear Plant, Units 1 & 2 - Nuclear Quality Assurance Plan, TVA-NQA-PLN89-A, R2019-05-0808 May 2019
Bellefont Nuclear Plant, Units 1 & 2; Browns Ferry Nuclear Plan, Units 1, 2 & 3; Clinch River Nuclear Site; Sequoyah Nuclear Plant, Units 1 & 2; and Watts Bar Nuclear Plant, Units 1 & 2 - Nuclear Quality Assurance Plan, TVA-NQA-PLN89-A, Rev
CNL-18-069, Tennessee Valley Authority - Nuclear Quality Assurance Plan, TVA-NQA-PLN89-A, Revisions 35 and 362018-05-0808 May 2018
Tennessee Valley Authority - Nuclear Quality Assurance Plan, TVA-NQA-PLN89-A, Revisions 35 and 36
CNL-18-022, Bellefonte, Unit 2 - Containment Vertical Tendon (V281) Failure - Final Report2018-02-23023 February 2018
Bellefonte, Unit 2 - Containment Vertical Tendon (V281) Failure - Final Report
CNL-17-154, Nuclear Quality Assurance Plan, TVA-NQA-PLN89-A, Revision 342017-12-27027 December 2017
Nuclear Quality Assurance Plan, TVA-NQA-PLN89-A, Revision 34
CNL-17-137, Bellefonte Nuclear Plant, Unit 2, Containment Vertical Tendon (V281) Failure - Third Interim Report2017-10-30030 October 2017
Bellefonte Nuclear Plant, Unit 2, Containment Vertical Tendon (V281) Failure - Third Interim Report
CNL-17-076, Bellefonte Nuclear Plant, Unit 2 - Containment Vertical Tendon (V281) Failure - Second Interim Report2017-06-0707 June 2017
Bellefonte Nuclear Plant, Unit 2 - Containment Vertical Tendon (V281) Failure - Second Interim Report
CNL-17-051, Bellefonte Nuclear Plant (Bln), Unit 2 - Status Update Regarding Construction Permit CPPR-1232017-03-31031 March 2017
Bellefonte Nuclear Plant (Bln), Unit 2 - Status Update Regarding Construction Permit CPPR-123
CNL-17-004, Bellefonte, Unit 2 - Containment Vertical Tendon (V281) Failure - First Interim Report2017-01-0606 January 2017
Bellefonte, Unit 2 - Containment Vertical Tendon (V281) Failure - First Interim Report
CNL-16-204, Bellefonte, Units 1 and 2, Browns Ferry, Units 1, 2, and 3, Sequoyah, Units 1 and 2, Watts Bar, Units 1 and 2 - Nuclear Quality Assurance Plan, TVA-NQA-PLN89-A, Revision 332016-12-28028 December 2016
Bellefonte, Units 1 and 2, Browns Ferry, Units 1, 2, and 3, Sequoyah, Units 1 and 2, Watts Bar, Units 1 and 2 - Nuclear Quality Assurance Plan, TVA-NQA-PLN89-A, Revision 33
CNL-16-085, Bellefonte, Browns Ferry, Sequoyah, and Watts Bar - Nuclear Quality Assurance Plan, TVA-NQA-PLN89-A2016-05-10010 May 2016
Bellefonte, Browns Ferry, Sequoyah, and Watts Bar - Nuclear Quality Assurance Plan, TVA-NQA-PLN89-A
CNL-15-096, Tennessee Valley Authority (TVA) Response to NRC Regulatory Issue Summary 2015-072015-06-19019 June 2015
Tennessee Valley Authority (TVA) Response to NRC Regulatory Issue Summary 2015-07
CNL-14-214, Bellefonte, Units 1 and 2 - Response to Request for Additional Information Regarding Near-Term Task Force Recommendation 2.1: Seismic Hazard and Screening Report2014-12-0303 December 2014
Bellefonte, Units 1 and 2 - Response to Request for Additional Information Regarding Near-Term Task Force Recommendation 2.1: Seismic Hazard and Screening Report
CNL-14-145, Bellefonte Nuclear Plant Units 1 and 2, Tennessee Valley Authority - Proposed Alternative Submittal Schedule as Described in the Attached Enclosures Due to the Deferred Construction Status2014-10-21021 October 2014
Bellefonte Nuclear Plant Units 1 and 2, Tennessee Valley Authority - Proposed Alternative Submittal Schedule as Described in the Attached Enclosures Due to the Deferred Construction Status
CNL-14-162, Bellefonte, Units 1 and 2, Browns Ferry, Units 1, 2, and 3, Sequoyah, Units 1 and 2, Watts Bar, Units 1 & 2, Nuclear Quality Assurance Plan, TVA-NQA-PLN89-A2014-08-29029 August 2014
Bellefonte, Units 1 and 2, Browns Ferry, Units 1, 2, and 3, Sequoyah, Units 1 and 2, Watts Bar, Units 1 & 2, Nuclear Quality Assurance Plan, TVA-NQA-PLN89-A
CNL-14-071, Bellefonte, Unit 2 - Request for Extension of Construction Permit CPPR-1232014-06-10010 June 2014
Bellefonte, Unit 2 - Request for Extension of Construction Permit CPPR-123
CNL-14-038, Tennessee Valley Authority'S Seismic Hazard & Screening Report (CEUS Sites), Response to NRC Request for Information Pursuant to 10 CFR 50.54(f) Recommendation 2.1 of Near-Term Task Force Review of Insights from the Fukushima Dai-ichi Acc2014-03-31031 March 2014
Tennessee Valley Authority'S Seismic Hazard & Screening Report (CEUS Sites), Response to NRC Request for Information Pursuant to 10 CFR 50.54(f) Recommendation 2.1 of Near-Term Task Force Review of Insights from the Fukushima Dai-ichi Accid
CNL-13-134, Nuclear Quality Assurance Plan, TVA-NQA-PLN89-A2013-12-0505 December 2013
Nuclear Quality Assurance Plan, TVA-NQA-PLN89-A
2021-09-10
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Text
Tennessee Valley Authority, 1101 Market Street, Chattanooga, Tennessee 37402 CNL 004 January 6, 2017 10 CFR 50.55(e)
ATTN : Document Control Desk U.S. Nuclear Regulatory Commission Washington, D.C. 20555-0001 Bellefonte Nuclear Plant, Unit 2 Construction Permit CPPR - 123 NRC Docket No. 50-439
Subject:
Bellefonte Nuclear Plant Unit 2 - Containment Vertical Tendon (V281)
Failure - First Interim Report The purpose of this letter is to inform the NRC that the subject defect was determined to be reportable in accordance with 10 CFR 50.55(e). TVA reported the defect to the NRC Operations Center on January 6, 2017, and referenced Bellefonte Condition Report 1239343.
The enclosure to this letter contains the first interim report for the subject tendon failure.
One regulatory commitment, to provide an updated report, is captured in Attachment 1 of this submittal. Please address any questions regarding this response to Gordon P. Arent at 423-365-2004.
Respectfully,
~~~
J. W . Shea Vice President, Nuclear Licensing
Enclosure:
10 CFR 50.55(e) Interim Report Bellefonte Nuclear Plant (BLN)
Containment Vertical Tendon Coupling Failure cc (Enclosure):
NRC Regional Administrator - Region II Deputy Regional Administrator Construction NRR Project Manager - Watts Bar Nuclear Plant
10 CFR 50.55(e) INTERIM REPORT BELLEFONTE NUCLEAR PLANT (BLN)
CONTAINMENT VERTICAL TENDON COUPLING FAILURE The following information regarding the BLN Containment Vertical Tendon Coupling failure is provided in accordance with 10 CFR 50.55(e)(6), Content of notification.
(i) Name and address of the individual or individuals informing the Commission.
James S. Chardos, BLN Site Manager 2744 Bellefonte Road Hollywood, Alabama 35752 (ii) Identification of the facility, the activity or the basic component supplied for the facility or the activity within the United States which contains a defect or fails to comply.
Tennessee Valley Authority (TVA) holds Construction Permit CPPR 123 for Bellefonte Nuclear Plant Unit 2, NRC Docket Number 50-439 (iii) Identification of the firm constructing or manufacturing facility or supplying the basic component which fails to comply or contains a defect.
TVA holds Construction Permit CPPR 123 for Bellefonte Nuclear Plant Unit 2, NRC Docket Number 50-439 (iv) Nature of the defect or failure to comply and the safety hazard which is created or could be created by the defect or failure to comply.
During a routine inspection on December 6, 2016, TVA found the Unit 2 Reactor Building Containment Vertical Tendon V281 rock anchor/tendon anchor coupling had failed. The anchor coupling appears to have sheared in the threaded portion allowing the anchor head for the vertical tendon and the anchor head for the rock anchor tendon to separate.
TVA had inspected the failed tendon coupling on October 19, 2016, and identified no signs of component specific damage or improper installation creating the potential for an unknown common mode failure.
This inspection of the failed Unit 2 Reactor Building Containment Vertical Tendon V281 coupling indicates a potential for an unknown common mode failure mechanism for BLN Containment vertical tendon rock anchor couplings.
Currently, the cause for the failure of the V281 rock anchor/tendon anchor coupling is unknown. As a result, the extent of condition can not be determined at this time. If multiple containment tendons had been found to be losing the capability to carry tendon design force, and this condition was left uncorrected, this could have reduced the capability of the containment structure to perform its design function. TVA had previously completed an analysis of containment structure integrity considering a single tendon coupler failure as a result of a similar failure of a Unit 1 Reactor Building Containment Vertical Tendon V9 in 2009 and determined that the containment structure is maintaining its design capability.
CNL-17-004 E-1 of 2
(v) The date on which the information of a defect or failure to comply was obtained.
The failure of the V281 rock anchor/tendon anchor coupling was found on December 6, 2016 during a routine inspection.
(vi) In the case of a basic component which contains a defect or fails to comply, the number and location of all basic components in use at the facility subject to the regulations in this part.
Each of the Unit 1 and Unit 2 Reactor Building Containments at BLN contain 185 vertical tendons with rock anchor/tendon anchor couplings.
(vii) In the case of a completed reactor manufactured under part 52 of this chapter, the entities to which the reactor was supplied.
BLN is not a completed reactor manufactured under part 52.
(viii)The corrective action that has been, is being, or will be taken; the name of the individual or organization responsible for the action; and the length of time that has been or will be taken to complete the action.
Upon discovery on December 6, 2016, the following actions were taken by BLN personnel.
Access to the Unit 2 tendon gallery was restricted.
The area of the V281 tendon failure was subsequently cleaned.
Grease samples were obtained and sent to TVA Central Labs for analysis.
The couplings from both the rock anchor and tendon anchor locations were removed and sent to TVA Central Labs for metallurgical analysis.
Grease samples were also collected from adjacent tendons (V272 through V290) to evaluate if conditions are similar to tendon V281 samples.
The failure was entered into the BLN Corrective Action Program (Condition Report 1239343)
TVA plans to provide an update to this report by May 25, 2017 following the completion of the metallurgical and grease analysis.
(ix) Any advice related to the defect or failure to comply about the facility, activity or basic component that has been, is being, or will be given to other entities.
Based on the unknown failure mechanism, TVA does not plan on communicating with other entities.
CNL-17-004 E-2 of 2
ATTACHMENT 1 10 CFR 50.55(E) INTERIM REPORT BELLEFONTE NUCLEAR PLANT (BLN)
CONTAINMENT VERTICAL TENDON COUPLING FAILURE LIST OF COMMITMENTS
- 1. TVA will submit an update to this interim report prior to May 25, 2017.
CNL-17-004 A1-1
