Letter Sequence Request |
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Results
Other: ML13059A267, ML13337A600, ML13357A331, ML15054A366, ML17059D129, RS-13-032, Overall Integrated Plan in Response to March 12, 2012 Commission Order Modifying Licenses with Regard to Requirements for Reliable Spent Fuel Pool Instrumentation (Order Number EA-12-051), RS-13-122, First Six-Month Status Report in Response to March 12, 2012 Commission Order Modifying Licenses with Regard to Reliable Spent Fuel Pool Instrumentation (Order Number EA-12-051), RS-13-123, First Six-Month Status Report in Response to March 12, 2012 Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events (Order Number EA-12-049), RS-14-200, Third Six-Month Status Report in Response to March 12, 2012 Commission Order Modifying Licenses with Regard to Reliable Spent Fuel Pool Instrumentation (Order Number EA-12-051), RS-14-210, Third Six-Month Status Report in Response to March 12, 2012 Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond Design- Basis External Events (Order Number EA-12-049), RS-16-024, Sixth Six-Month Status Report in Response to March 12, 2012 Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events (Order Number EA-12-049), RS-17-062, Report of Full Compliance with March 12, 2012 Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events (Order Number EA-12-049)
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MONTHYEARML13059A2672013-02-28028 February 2013
Overall Integrated Plan in Response to March 12, 2012 Commission Order Modifying Licenses with Regard to Requirements for Reliable Hardened Containment Vents (Order Number EA-12-050)
Project stage: Other
RS-13-032, Overall Integrated Plan in Response to March 12, 2012 Commission Order Modifying Licenses with Regard to Requirements for Reliable Spent Fuel Pool Instrumentation (Order Number EA-12-051)2013-02-28028 February 2013
Overall Integrated Plan in Response to March 12, 2012 Commission Order Modifying Licenses with Regard to Requirements for Reliable Spent Fuel Pool Instrumentation (Order Number EA-12-051)
Project stage: Other
ML13171A3152013-06-24024 June 2013
Request for Additional Information Overall Integrated Plan in Response to Order EA-12-051, Reliable Spent Fuel Pool Instrumentation
Project stage: RAI
RS-13-177, Response to Request for Additional Information - Overall Integrated Plan in Response to Commission Order Modifying License Requirements for Reliable Spent Fuel Pool Instrumentation (Order No. EA-12-051)2013-07-18018 July 2013
Response to Request for Additional Information - Overall Integrated Plan in Response to Commission Order Modifying License Requirements for Reliable Spent Fuel Pool Instrumentation (Order No. EA-12-051)
Project stage: Response to RAI
RS-13-123, First Six-Month Status Report in Response to March 12, 2012 Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events (Order Number EA-12-049)2013-08-28028 August 2013
First Six-Month Status Report in Response to March 12, 2012 Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events (Order Number EA-12-049)
Project stage: Other
RS-13-122, First Six-Month Status Report in Response to March 12, 2012 Commission Order Modifying Licenses with Regard to Reliable Spent Fuel Pool Instrumentation (Order Number EA-12-051)2013-08-28028 August 2013
First Six-Month Status Report in Response to March 12, 2012 Commission Order Modifying Licenses with Regard to Reliable Spent Fuel Pool Instrumentation (Order Number EA-12-051)
Project stage: Other
ML13273A5382013-10-23023 October 2013
Interim Staff Evaluation and Request for Additional Information Regarding the Overall Integrated Plan for Implementation of Order EA-12-051, Reliable Spent Fuel Pool Instrumentation
Project stage: RAI
ML13357A3312014-01-0606 January 2014
Mega-Tech Services, LLC Technical Evaluation Report Regarding the Overall Integrated Plan for Limerick Generating Station, Units 1 and 2, TAC Nos.: MF0847 and MF0848
Project stage: Other
ML14008A0522014-01-0707 January 2014
ACE Email to NRC, Jan 7 2014, Re Limerick Alarm
Project stage: Request
ML13337A6002014-01-10010 January 2014
Interim Staff Evaluation Relating to Overall Integrated Plan in Response to Order EA-12-049 (Mitigation Strategies)
Project stage: Other
LG-14-031, Special Report - Seismic Monitoring Instrumentation Inoperability Channel XE-VA- 1022014-02-26026 February 2014
Special Report - Seismic Monitoring Instrumentation Inoperability Channel XE-VA- 102
Project stage: Request
RS-14-210, Third Six-Month Status Report in Response to March 12, 2012 Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond Design- Basis External Events (Order Number EA-12-049)2014-08-28028 August 2014
Third Six-Month Status Report in Response to March 12, 2012 Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond Design- Basis External Events (Order Number EA-12-049)
Project stage: Other
RS-14-200, Third Six-Month Status Report in Response to March 12, 2012 Commission Order Modifying Licenses with Regard to Reliable Spent Fuel Pool Instrumentation (Order Number EA-12-051)2014-08-28028 August 2014
Third Six-Month Status Report in Response to March 12, 2012 Commission Order Modifying Licenses with Regard to Reliable Spent Fuel Pool Instrumentation (Order Number EA-12-051)
Project stage: Other
ML15054A3662015-03-17017 March 2015
Report for the Audit Regarding Implementation of Mitigating Strategies and Reliable Spent Fuel Pool Instrumentation Related to Orders EA-12-049 and EA-12-051
Project stage: Other
RS-15-101, Request for Schedule Relaxation from NRC Order EA-12-049, Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events2015-04-0202 April 2015
Request for Schedule Relaxation from NRC Order EA-12-049, Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events
Project stage: Request
RS-15-183, Request for Second Schedule Relaxation from NRC Order EA-12-049, Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events2015-07-0909 July 2015
Request for Second Schedule Relaxation from NRC Order EA-12-049, Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events
Project stage: Request
ML15194A0682015-07-20020 July 2015
180-Day Relaxation of Certain Schedule Requirements for Order EA-12-049 Issuance of Order to Modify Licenses with Regard to Requirements for Mitigating Strategies for Beyond Design Basis External Events
Project stage: Approval
RS-16-024, Sixth Six-Month Status Report in Response to March 12, 2012 Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events (Order Number EA-12-049)2016-02-26026 February 2016
Sixth Six-Month Status Report in Response to March 12, 2012 Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events (Order Number EA-12-049)
Project stage: Other
ML17059D1292017-02-28028 February 2017
Eighth Six-Month Status Report in Response to March 12, 2012 Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond Design-Basis External Events
Project stage: Other
RS-17-062, Report of Full Compliance with March 12, 2012 Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events (Order Number EA-12-049)2017-07-20020 July 2017
Report of Full Compliance with March 12, 2012 Commission Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events (Order Number EA-12-049)
Project stage: Other
2014-02-26
[Table View] |
Text
Exeton Generation, TRM 3.3.7.2 LG-14-031 February 26, 2014 U.S. Nuclear Regulatory Commission Attn.: Document Control Desk Washington, DC 20555-0001 Limerick Generating Station, Units 1 and 2 Facility Operating License Nos. NPF-39 and NPF-85 NRC Docket Nos. 50-352 and 50-353
Subject:
Special Report - Seismic Monitoring Instrumentation Inoperability Channel XE-VA-102
References:
- 1. Special Report-Seismic Monitoring Instrumentation Inoperability, dated 01/16/13 This Special Report is being submitted pursuant to the requirements of Limerick Generating Station (LGS), Unit 1 and Unit 2 Updated Final Safety Analysis Report (UFSAR) section 3.7.4.5, Technical Specification 6.9.2, and Technical Requirements Manual 3.3.7.2 which states '"With one or more of the seismic monitoring instruments inoperable for more than 30 days, a Special Report shall be prepared and submitted to the Nuclear Regulatory Commission pursuant to Specification 6.9.2 of the Technical Specifications within the next ten days outlining the cause of the malfunction and the plans for restoring the instrument(s) to operable status."
On Friday January 17, 2014 Unit 1 and 2 were operating at 100% power with functional testing (ST-2-036-426-0) of the seismic monitoring instrumentation in progress. During the test, the seismic monitor sensor array (XE-VA-1 02) for the Primary Containment Foundation Sensor did not provide the Main Control Room (MCR) alarm or the local indicating light.
The XE-VA-102 array has three channels which measure longitudinal movement, vertical movement, and transverse movement. The transverse channel of XE-VA-1 02 will trigger XR-VA-102/103 to log/record data, but will not actuate the MCR alarm or the light as expected.
Accordingly, Operations declared the recorder inoperable. The other two XE-VA-1 02 channels for the horizontal and vertical directions function and will trigger, log/record data and provide the MCR alarm and the local indicating light.
Initial troubleshooting has not determined the cause. Additional troubleshooting will be required to identify the cause of the inoperable sensor XE-VA-1 02 and recorder XR-VA-102/103 for XE-VA-1 02. The sensor and recorder will be repaired, tested, and returned to operable status by the end of 1 R15 refueling outage (April 2014).
If you have any questions or require additional information, please do not hesitate to contact us.
Sincwerelly,..
Thomas J. Dougherty Vice President - Limerick Generating Station Exelon Generation Company, LLC
Attachment:
List of commitments cc: Administrator, Region I, NRC NRC Senior Resident Inspector, Limerick
SUMMARY
OF REGULATORY COMMITMENTS The following table identifies commitments made in this document. (Any other actions discussed In the submittal represent intended or planned actions. They are described to the NRC for the NRC's information and are not regulatory commitments.)
COMMITTED COMMITMENT TYPE COMMITMENT DATE OR "OUTAGE ONE-TIME PROGRAMMATIC ACTION (Yes/No)
(Yes/No)
The inoperable seismic monitor sensor array (XE-VA-Outage Yes No 102) that is located in the Unit 1 HPCI Room will be repaired, tested, and returned to operable status by the end of the 1 R15 refueling outage (April 2014).
The inoperable seismic monitor recorder XR-VA-Outage Yes No 102/103 for XE-VE-1 02 will be repaired, tested, and returned to operable status by the end of the 1 R15 refueling outage (April 2014).
