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| number = ML14188C440 | | number = ML14188C440 | ||
| issue date = 07/22/2014 | | issue date = 07/22/2014 | ||
| title = 6/3/2014 Summary of Meeting with Luminant Generation Company LLC to Discuss Proposed Modifications to Technical Specifications to Install Backup Transformer XST1A for Comanche Peak, Units 1 and 2 | | title = 6/3/2014 Summary of Meeting with Luminant Generation Company LLC to Discuss Proposed Modifications to Technical Specifications to Install Backup Transformer XST1A for Comanche Peak, Units 1 and 2 | ||
| author name = Singal B | | author name = Singal B | ||
| author affiliation = NRC/NRR/DORL/LPLIV-1 | | author affiliation = NRC/NRR/DORL/LPLIV-1 | ||
| Line 18: | Line 18: | ||
=Text= | =Text= | ||
{{#Wiki_filter:LICENSEE: | {{#Wiki_filter:UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 July 22, 2014 LICENSEE: Luminant Generation Company LLC FACILITY: Comanche Peak Nuclear Power Plant, Units 1 and 2 | ||
FACILITY: | |||
==SUBJECT:== | ==SUBJECT:== | ||
==SUMMARY== | ==SUMMARY== | ||
OF JUNE 3, 2014, PRE-LICENSING PUBLIC MEETING WITH LUMINANT GENERATION COMPANY LLC TO DISCUSS THE PROPOSED LICENSE AMENDMENT REQUEST FOR A ONE-TIME EXTENSION OF COMPLETION TIME FOR LCO 3.8.1 FOR THE INSTALLATION OF AN ALTERNATE TRANSFORMER FOR OFFSITE POWER SOURCE (TAC NOS. MF3909 AND MF3910) On June 3, 2014, a public meeting was held between the U.S. Nuclear Regulatory Commission (NRC), and representatives of Luminant Generation Company LLC (Luminant, the licensee), at NRC Headquarters, Rockville, Maryland. | OF JUNE 3, 2014, PRE-LICENSING PUBLIC MEETING WITH LUMINANT GENERATION COMPANY LLC TO DISCUSS THE PROPOSED LICENSE AMENDMENT REQUEST FOR A ONE-TIME EXTENSION OF COMPLETION TIME FOR LCO 3.8.1 FOR THE INSTALLATION OF AN ALTERNATE TRANSFORMER FOR OFFSITE POWER SOURCE (TAC NOS. | ||
The meeting notice and agenda, dated May 2, 2014, is located in the Agencywide Documents Access and Management System (ADAMS) under Accession No. ML14122A089. | MF3909 AND MF3910) | ||
The purpose of the meeting was to discuss the proposed license amendment request (LAR) for a one-time extension of the Completion Time (CT) for Limiting Conditions for Operation (LCO) 3.8.1, "AC [Alternating Current] Sources-Operating," to complete the plant modification for installation of an alternate transformer for offsite AC power sources at Comanche Peak Nuclear Power Plant (CPNPP), Units 1 and 2. A list of meeting attendees is provided in Enclosure to this meeting summary. Meeting Summary The discussion was based on the following meeting materials/handouts: | On June 3, 2014, a public meeting was held between the U.S. Nuclear Regulatory Commission (NRC), and representatives of Luminant Generation Company LLC (Luminant, the licensee), at NRC Headquarters, Rockville, Maryland. The meeting notice and agenda, dated May 2, 2014, is located in the Agencywide Documents Access and Management System (ADAMS) under Accession No. ML14122A089. The purpose of the meeting was to discuss the proposed license amendment request (LAR) for a one-time extension of the Completion Time (CT) for Limiting Conditions for Operation (LCO) 3.8.1, "AC [Alternating Current] Sources- Operating," to complete the plant modification for installation of an alternate transformer for offsite AC power sources at Comanche Peak Nuclear Power Plant (CPNPP), Units 1 and 2. | ||
* Slides provided by Luminant, "Comanche Peak -Modification of Offsite Power Supplies to Improve Reliability," dated June 3, 2014 (ADAMS Accession No.ML14141A640) | A list of meeting attendees is provided in Enclosure to this meeting summary. | ||
Background The NRC previously issued Amendment No. 160 for Facility Operating Licenses NPF-87 and NPF-89 by letter dated September 18, 2013 (ADAMS Accession No. ML13232A143), to revise Technical Specification (TS) 3.8.1 to extend the CT for Required Action A.3, "Restore required offsite circuit to OPERABLE status," from 72 hours to 14 days (to be used twice) while completing the plant modification to install transformer XST1A. The licensee completed a portion of the modification and used only one of the approved CT extensions. | Meeting Summary The discussion was based on the following meeting materials/handouts: | ||
During the installation, the licensee inadvertently cut the wrong offsite power cable resulting in total loss of offsite power to both units and efforts to complete the plant modification were terminated. The purpose of this meeting was for the licensee to discuss the following: | * Slides provided by Luminant, "Comanche Peak - Modification of Offsite Power Supplies to Improve Reliability," dated June 3, 2014 (ADAMS Accession No.ML14141A640) | ||
===Background=== | |||
The NRC previously issued Amendment No. 160 for Facility Operating Licenses NPF-87 and NPF-89 by letter dated September 18, 2013 (ADAMS Accession No. ML13232A143), to revise Technical Specification (TS) 3.8.1 to extend the CT for Required Action A.3, "Restore required offsite circuit to OPERABLE status," from 72 hours to 14 days (to be used twice) while completing the plant modification to install transformer XST1A. The licensee completed a portion of the modification and used only one of the approved CT extensions. During the installation, the licensee inadvertently cut the wrong offsite power cable resulting in total loss of offsite power to both units and efforts to complete the plant modification were terminated. | |||
The purpose of this meeting was for the licensee to discuss the following: | |||
* Provide a background of the plant modification, including the activities to be performed under the proposed LAR. | * Provide a background of the plant modification, including the activities to be performed under the proposed LAR. | ||
* Describe the cut-cable event, root cause analysis, and corrective actions implemented to preclude reoccurrence. | * Describe the cut-cable event, root cause analysis, and corrective actions implemented to preclude reoccurrence. | ||
* Describe the strategies for the proposed defense-in-depth risk management and for completing the modifications. | * Describe the strategies for the proposed defense-in-depth risk management and for completing the modifications. | ||
* Schedule for the submittal of the proposed LAR. Results of Discussion: | * Schedule for the submittal of the proposed LAR. | ||
* The NRC staff asked how long it normally takes to transfer the offsite power from the main start-up (ST) transformer to the alternate ST transformer. | Results of Discussion: | ||
The licensee stated that, based on past experience, all actions to transfer the offsite power from main to alternate transformer can be completed in about 12 to 14 hours. | * The NRC staff asked how long it normally takes to transfer the offsite power from the main start-up (ST) transformer to the alternate ST transformer. The licensee stated that, based on past experience, all actions to transfer the offsite power from main to alternate transformer can be completed in about 12 to 14 hours. | ||
* The NRC staff asked why the ST transformers XST2 and XST2A serving Unit 1 did not need Tap Boxes but ST transformers serving Unit 2 did. The licensee stated that the cables for Unit 2 were too short and that the Tab boxes were needed to extend the length of the cables. | * The NRC staff asked why the ST transformers XST2 and XST2A serving Unit 1 did not need Tap Boxes but ST transformers serving Unit 2 did. The licensee stated that the cables for Unit 2 were too short and that the Tab boxes were needed to extend the length of the cables. | ||
* The NRC staff asked about the status of the corrective actions as a result of the cut-cable event. The licensee stated that majority of the corrective actions have been completed and confirmed that all remaining corrective actions will be completed before implementing the proposed modification. | * The NRC staff asked about the status of the corrective actions as a result of the cut-cable event. The licensee stated that majority of the corrective actions have been completed and confirmed that all remaining corrective actions will be completed before implementing the proposed modification. | ||
| Line 43: | Line 46: | ||
* The licensee stated that the proposed LAR will be submitted to the NRC staff for review by July 15, 2014, and would request approval by January 15, 2015, so that it can implement the modification in March 2015. | * The licensee stated that the proposed LAR will be submitted to the NRC staff for review by July 15, 2014, and would request approval by January 15, 2015, so that it can implement the modification in March 2015. | ||
* The NRC staff expressed concern about the tight schedule and requested that the licensee expedite the submittal. | * The NRC staff expressed concern about the tight schedule and requested that the licensee expedite the submittal. | ||
No Public Meeting Feedback Forms were received for this meeting. Please direct any inquiries to me at (301) 415-3016, or balwant.singal@nrc.gov. | No Public Meeting Feedback Forms were received for this meeting. | ||
Docket Nos. 50-445 and 50-446 | |||
Please direct any inquiries to me at (301) 415-3016, or balwant.singal@nrc.gov. | |||
Sincerely, | |||
~~cg~~ | |||
Balwant K. Singal, Senior Project Manager Plant Licensing Branch IV-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-445 and 50-446 | |||
==Enclosure:== | ==Enclosure:== | ||
List of Attendees cc w/encl: Distribution via Listserv | List of Attendees cc w/encl: Distribution via Listserv | ||
LIST OF ATTENDEES MEETING WITH LUMINANT GENERATION COMPANY LLC REGARDING ONE-TIME EXTENSION OF LIMITING CONDITION FOR OPERATION 3.8.1 COMANCHE PEAK NUCLEAR POWER PLANT. UNITS 1 AND 2 DOCKET NOS. 50-445 AND 50-446 JUNE 3. 2014 Name Title Organization Vijay Goel Electrical Engineer NRR Khadijah Hemphill Reactor Systems Engineer NRR Jacob Zimmerman Chief, Electrical Engineering Branch NRR Peter Snyder General Engineer NRR Balwant Singal Senior Project Manager NRR Tim Hope Manager, Regulatory Affairs Luminant Generation Company LLC (Luminant) | |||
Todd Evans Project Manager Luminant Tamera Ervin- Walker Principal Engineer, Nuclear Luminant Nathan Larson Risk & Reliability Engineer Luminant Tom McCool Vice President Engineering and Luminant Support Enclosure | |||
ML14188C440 OFFICE NRRIDORULPL4-1/PM N RRIDORULPL4-1/PM NRR!DORULPL4-1/LA NRRIDSS/STSB/BC NAME SGoetz BSingal JBurkhardt REIIiott DATE 7/9/14 7/9/14 7/9/14 7/10/14 OFFICE NRRIDE/EEEB/BC N RRIDORULPL4-1/BC NRR!DORLILPL4-1/PM NAME JZimmerman MMarkley (PBamford for) BSingal DATE 7/14/14 7/22/14 7/22/14}} | |||
Latest revision as of 19:39, 19 March 2020
| ML14188C440 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 07/22/2014 |
| From: | Balwant Singal Plant Licensing Branch IV |
| To: | |
| Singal B | |
| References | |
| TAC MF3909, TAC MF3910 | |
| Download: ML14188C440 (5) | |
Text
UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 July 22, 2014 LICENSEE: Luminant Generation Company LLC FACILITY: Comanche Peak Nuclear Power Plant, Units 1 and 2
SUBJECT:
SUMMARY
OF JUNE 3, 2014, PRE-LICENSING PUBLIC MEETING WITH LUMINANT GENERATION COMPANY LLC TO DISCUSS THE PROPOSED LICENSE AMENDMENT REQUEST FOR A ONE-TIME EXTENSION OF COMPLETION TIME FOR LCO 3.8.1 FOR THE INSTALLATION OF AN ALTERNATE TRANSFORMER FOR OFFSITE POWER SOURCE (TAC NOS.
MF3909 AND MF3910)
On June 3, 2014, a public meeting was held between the U.S. Nuclear Regulatory Commission (NRC), and representatives of Luminant Generation Company LLC (Luminant, the licensee), at NRC Headquarters, Rockville, Maryland. The meeting notice and agenda, dated May 2, 2014, is located in the Agencywide Documents Access and Management System (ADAMS) under Accession No. ML14122A089. The purpose of the meeting was to discuss the proposed license amendment request (LAR) for a one-time extension of the Completion Time (CT) for Limiting Conditions for Operation (LCO) 3.8.1, "AC [Alternating Current] Sources- Operating," to complete the plant modification for installation of an alternate transformer for offsite AC power sources at Comanche Peak Nuclear Power Plant (CPNPP), Units 1 and 2.
A list of meeting attendees is provided in Enclosure to this meeting summary.
Meeting Summary The discussion was based on the following meeting materials/handouts:
- Slides provided by Luminant, "Comanche Peak - Modification of Offsite Power Supplies to Improve Reliability," dated June 3, 2014 (ADAMS Accession No.ML14141A640)
Background
The NRC previously issued Amendment No. 160 for Facility Operating Licenses NPF-87 and NPF-89 by letter dated September 18, 2013 (ADAMS Accession No. ML13232A143), to revise Technical Specification (TS) 3.8.1 to extend the CT for Required Action A.3, "Restore required offsite circuit to OPERABLE status," from 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> to 14 days (to be used twice) while completing the plant modification to install transformer XST1A. The licensee completed a portion of the modification and used only one of the approved CT extensions. During the installation, the licensee inadvertently cut the wrong offsite power cable resulting in total loss of offsite power to both units and efforts to complete the plant modification were terminated.
The purpose of this meeting was for the licensee to discuss the following:
- Provide a background of the plant modification, including the activities to be performed under the proposed LAR.
- Describe the cut-cable event, root cause analysis, and corrective actions implemented to preclude reoccurrence.
- Describe the strategies for the proposed defense-in-depth risk management and for completing the modifications.
- Schedule for the submittal of the proposed LAR.
Results of Discussion:
- The NRC staff asked how long it normally takes to transfer the offsite power from the main start-up (ST) transformer to the alternate ST transformer. The licensee stated that, based on past experience, all actions to transfer the offsite power from main to alternate transformer can be completed in about 12 to 14 hours1.62037e-4 days <br />0.00389 hours <br />2.314815e-5 weeks <br />5.327e-6 months <br />.
- The NRC staff asked why the ST transformers XST2 and XST2A serving Unit 1 did not need Tap Boxes but ST transformers serving Unit 2 did. The licensee stated that the cables for Unit 2 were too short and that the Tab boxes were needed to extend the length of the cables.
- The NRC staff asked about the status of the corrective actions as a result of the cut-cable event. The licensee stated that majority of the corrective actions have been completed and confirmed that all remaining corrective actions will be completed before implementing the proposed modification.
- The NRC asked if the proposed LAR will be based on a risk-informed approach.
The licensee stated that the proposed LAR will be based on deterministic principles and not submitted as a risk-informed licensing action.
- The licensee stated that the proposed LAR will be submitted to the NRC staff for review by July 15, 2014, and would request approval by January 15, 2015, so that it can implement the modification in March 2015.
- The NRC staff expressed concern about the tight schedule and requested that the licensee expedite the submittal.
No Public Meeting Feedback Forms were received for this meeting.
Please direct any inquiries to me at (301) 415-3016, or balwant.singal@nrc.gov.
Sincerely,
~~cg~~
Balwant K. Singal, Senior Project Manager Plant Licensing Branch IV-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-445 and 50-446
Enclosure:
List of Attendees cc w/encl: Distribution via Listserv
LIST OF ATTENDEES MEETING WITH LUMINANT GENERATION COMPANY LLC REGARDING ONE-TIME EXTENSION OF LIMITING CONDITION FOR OPERATION 3.8.1 COMANCHE PEAK NUCLEAR POWER PLANT. UNITS 1 AND 2 DOCKET NOS. 50-445 AND 50-446 JUNE 3. 2014 Name Title Organization Vijay Goel Electrical Engineer NRR Khadijah Hemphill Reactor Systems Engineer NRR Jacob Zimmerman Chief, Electrical Engineering Branch NRR Peter Snyder General Engineer NRR Balwant Singal Senior Project Manager NRR Tim Hope Manager, Regulatory Affairs Luminant Generation Company LLC (Luminant)
Todd Evans Project Manager Luminant Tamera Ervin- Walker Principal Engineer, Nuclear Luminant Nathan Larson Risk & Reliability Engineer Luminant Tom McCool Vice President Engineering and Luminant Support Enclosure
ML14188C440 OFFICE NRRIDORULPL4-1/PM N RRIDORULPL4-1/PM NRR!DORULPL4-1/LA NRRIDSS/STSB/BC NAME SGoetz BSingal JBurkhardt REIIiott DATE 7/9/14 7/9/14 7/9/14 7/10/14 OFFICE NRRIDE/EEEB/BC N RRIDORULPL4-1/BC NRR!DORLILPL4-1/PM NAME JZimmerman MMarkley (PBamford for) BSingal DATE 7/14/14 7/22/14 7/22/14