ML22095A004
| ML22095A004 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 03/29/2022 |
| From: | Duke Energy Corp |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| TR-NUC-CN-013974 | |
| Download: ML22095A004 (12) | |
Text
Date: 3/29/2022 Distribution: Duke Energy Document Transmittal #: TR*NUC-CN-013974
- 1. (CNS) U S NUC REG WASHINGTON DC
- 2. Andrews, Sherry E DOCUMENT TRANSMITTAL FORM
Purpose:
IDB Released By:
- 3. Byers, Kristi S Facility: CATAWIIA NUCL!iiAR SIAilQN ~ukc lioccgr
- 4. CNS - WCC/SSA
- 5. CNS C/R DWGS. SSA SUBJECT ~oo C2o~cd Road SLC Mtnutl R~i1ion t!! 16.7*5 tnd LOES ~Qi;;umcot M101gcmcot
- 6. CNS COMPL FILE (ORIG)X
- 12. CONTROL ROOM SSA
- 13. Edmond, Russell L
- 14. Lowery, Tonya Sullivan
- 15. Mlronenko, Artur N
- 16. OPS TRAINING
- 17. Owens, Lori
- 18. Pursley, Sandy
- 19. WESTINGHOUSE ELECTRIC CO LLC Page 1 of 1 Document ID 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 LICN - CN - CNS-SLC-16.7 004 - ISSUED FYIIE FYIIE FYIIE FYIILP FYIIE FYIIE FYIIE FYI IE FYIIE FYI IE FYIIE FYIILP FYIIE FYIIE FYIIE FYIIE FYIIE FYIIE FYIIE LICN - CN - CNS-SLC-LOES - 105 - ISSUED FYIIE FYIIE FYIIE FYI ILP FYIIE FYIIE FYIIE FYIIE FYIIE FYI IE FYIIE FYIILP FYIIE FYIIE FYIIE FYIIE FYIIE FYIIE FYIIE LICN - CN - SLC Letter to Manual Holders - FYIIE FYIIE FYIIE FYI ILP FYIIE FYIIE FYIIE FYIIE FYIIE FYIIE FYIIE FYIILP FYIIE FYIIE FYIIE FYIIE FYIIE FYIIE FYIIE 105 - ISSUED Remarks:
Remove and Insert Replace the following page(s) of Catawba Nuclear Station Selected Licensee Commitments (SLC) Manual with the attached revised page(s). The revised page(s) are identified by Section number and contains marginal lines indicating the areas of change.
REMOVE THESE PAGES INSERT THESE PAGES LIST OF EFFECTIVE SECTIONS Pages 1-5 Pages 1-5 Revision 104 Revision 105 TAB 16.7 16.7-5, Pages 1-3 16.7-5, Pages 1-5 Revision 5 Revision 6 If you have any questions concerning the contents of this Catawba Nuclear Station Selected Licensee Commitments (SLC) Manual update, please contact Nicole Edwards (704)382-6669.
LIST OF EFFECTIVE SECTIONS SECTION REVISION NUMBER REVISION DATE TABLE OF CONTENTS 15 05/10/16 16.1 1 08/27/08 16.2 2 08/21/09 16.3 1 08/21/09 16.5-1 7 03/30/21 16.5-2 Deleted 16.5-3 2 09/19/19 16.5-4 1 01/27/22 16.5-5 1 01/28/10 16.5-6 2 02/16/22 16.5-7 2 02/06/15 16.5-8 Deleted 16.5-9 Deleted 03/02/21 16.5-10 Deleted 16.6-1 0 10/09/02 16.6-2 Deleted 16.6-3 2 01/27/22 16.6-4 2 11/21/19 16.6-5 3 07/07/20 16.7-1 1 08/21/09 16.7-2 4 02/03/11 16.7-3 5 11/21/19 16.7-4 2 08/21/09 16.7-5 6 03/29/22 Catawba Units 1 and 2 Page 1 Revision 105
LIST OF EFFECTIVE SECTIONS SECTION REVISION NUMBER REVISION DATE 16.7-6 3 06/10/16 16.7-7 1 08/21/09 16.7-8 2 08/21/09 16.7-9 13 09/14/21 16.7-10 10 01/27/22 16.7-11 1 08/21/09 16.7-12 1 08/21/09 16.7-13 3 06/10/16 16.7-14 1 08/21/09 16.7-15 2 01/27/22 16.7-16 0 06/08/09 16.7-17 0 02/10/15 16.7-18 0 05/10/16 16.8-1 8 01/27/22 16.8-2 3 12/18/19 16.8-3 1 10/24/06 16.8-4 2 11/05/07 16.8-5 3 08/21/09 16.9-1 10 01/29/19 16.9-2 6 08/03/17 16.9-3 5 07/03/18 16.9-4 5 09/11/17 16.9-5 11 10/08/19 16.9-6 12 07/03/18 Catawba Units 1 and 2 Page2 Revision 105
LIST OF EFFECTIVE SECTIONS SECTION REVISION NUMBER REVISION DATE 16.9-7 4 08/21/09 16.9-8 5 08/21/09 16.9-9 3 08/21/09 16.9-10 5 08/21/09 16.9-11 3 08/21/09 16.9-12 3 02/10/15 16.9-13 4 09/27/16 16.9-14 1 09/25/06 16.9-15 2 08/21/09 16.9-16 2 08/21/09 16.9-17 0 10/09/02 16.9-18 Deleted 16.9-19 3 02/20/12 16.9-20 0 10/09/02 16.9-21 1 10/13/16 16.9-22 1 08/21/09 16.9-23 5 08/03/17 16.9-24 2 10/24/06 16.9-25 2 08/21/09 16.9-26 1 11/15/18 16.10-1 1 08/21/09 16.10-2 1 10/24/06 16.10-3 1 08/21/09 16.10-4 0 08/04/20 Catawba Units 1 and 2 Page 3 Revision 105
LIST OF EFFECTIVE SECTIONS SECTION REVISION NUMBER REVISION DATE 16.10-5 1 03/16/21 16.11-1 1 07/27/13 16.11-2 7 01/27/22 16.11-3 0 10/09/02 16.11-4 1 08/21/09 16.11-5 0 10/09/02 16.11-6 3 08/03/15 16.11-7 13 01/27/22 16.11-8 0 10/09/02 16.11-9 0 10/09/02 16.11-10 1 08/21/09 16.11-11 1 03/20/03 16.11-12 0 10/09/02 16.11-13 1 07/27/13 16.11-14 0 10/09/02 16.11-15 0 10/09/02 16.11-16 1 10/24/11 16.11-17 0 10/09/02 16.11-18 1 08/21/09 16.11-19 0 10/09/02 16.11-20 3 11/21/19 16.11-21 0 10/09/02 16.12-1 0 10/09/02 16.13-1 1 08/03/17 16.13-2 Deleted Catawba Units 1 and 2 Page4 Revision 105
LIST OF EFFECTIVE SECTIONS SECTION REVISION NUMBER REVISION DATE 16.13-3 Deleted 16.13-4 4 10/04/21 Catawba Units 1 and 2 Page5 Revision 105
Turbine Overspeed Protection 16.7-5 16.7 INSTRUMENTATION 16.7-5 Turbine Overspeed Protection COMMITMENT At least one Turbine Overspeed Protection System shall be FUNCTIONAL.
APPLICABILITY: MODES 1, 2, and 3.
REMEDIAL ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME A. One stop valve or one A.1 Restore non-functional 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> control valve per high valve(s) to FUNCTIONAL pressure turbine steam status.
line non-functional.
OR A.2 Close at least one valve in 78 hours9.027778e-4 days <br />0.0217 hours <br />1.289683e-4 weeks <br />2.9679e-5 months <br /> affected *steam line(s).
OR A.3 Isolate the turbine from the 78 hours9.027778e-4 days <br />0.0217 hours <br />1.289683e-4 weeks <br />2.9679e-5 months <br /> steam supply.
B. One intermediate stop B.1 Restore non-functional 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> valve or one intercept valve(s) to FUNCTIONAL valve per low pressure status.
turbine steam line non-functional. OR B.2 Close at least one valve in 78 hours9.027778e-4 days <br />0.0217 hours <br />1.289683e-4 weeks <br />2.9679e-5 months <br /> affected steam line(s).
OR B.3 Isolate the turbine from the 78 hours9.027778e-4 days <br />0.0217 hours <br />1.289683e-4 weeks <br />2.9679e-5 months <br /> steam supply.
(continued)
Catawba Units 1 and 2 16.7-5-1 Revision 6
Turbine Overspeed Protection 16.7-5 REMEDIAL ACTIONS (continued)
CONDITION REQUIRED ACTION COMPLETION TIME C. Turbine Overspeed C.1 Isolate the turbine from the 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> Protection System non- steam supply.
functional for reasons other than Condition A or B.
TESTING REQUIREMENTS TEST FREQUENCY TR 16.7-5-1 --------NOTES--------
- 1. This TR shall be performed in MODE 1 or in MODE 2 with the turbine operating.
- 2. Not required to be performed until 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> after each valve is opened.
Cycle while performing a direct observation of the four In accordance with high pressure turbine stop valves, six low pressure SLC 16.7-5 Bases turbine intermediate stop valves, six low pressure turbine intercept valves, and four high pressure turbine control valves, through one complete cycle from the running position.
TR 16.7-5-2 Perform CHANNEL CALIBRATION. 18 months (continued)
Catawba Units 1 and 2 16.7-5-2 Revision 6
Turbine Overspeed Protection 16.7-5 TEST FREQUENCY TR 16. 7-5-3 Disassemble at least one each of the four high pressure 54 months turbine stop valves, six low pressure turbine intermediate stop valves, six low pressure turbine intercept valves, and four high pressure turbine control valves, and perform a visual and surface inspection of valve seats, disks, and stems, and verify no unacceptable flaws or corrosion.
TR 16.7-5-4 Perform mechanical trip testing. In accordance with SLC 16.7-5 Bases.
TR 16.7-5-5 Perform electrical trip testing. In accordance with SLC 16.7-5 Bases BASES This COMMITMENT is provided to ensure that the Turbine Overspeed Protection instrumentation and the turbine speed control valves are FUNCTIONAL and will protect the turbine from excessive overspeed.
Protection from turbine excessive overspeed is required since excessive overspeed of the turbine could generate potentially damaging missiles which could impact and damage safety related components, equipment, or structures.
The term "Isolate the turbine from the steam supply" used in Required Actions A.3, 8.3, and C.1 can be met in several ways. These include:
Maintaining the turbine in a tripped condition; or Hydraulically gagging all four main stop valves closed; or Hydraulically gagging all four main control valves closed; or Closing the main steam isolation valves and main steam isolation valve bypass valves.
Calculation CNC 1200.00-00-0006 provides qualitative and quantitative assessment for interval extension on Turbine Valve Movement Testing (TVMT). The calculation concludes that it is allowable to have a maximum 18-month TVMT interval for HP Stop Valves, HP Control Valves and LP Combined Intermediate Valves, based on main turbine missile probabilities. It is desired to incrementally extend the current test frequency from 4 months to 18 months based on two successful tests at each extended test interval no greater than half the previous test interval (e.g. the 4-month frequency would be extended to 6-months; the 6-month interval would be extended to 9 months and the 9 month frequency to 12 months, the 12 month frequency to 15 months and finally the 15 month interval to 18 months). The other recommendation is that CNS trend EHC fluid quality measurements to ensure fluid quality remains within acceptable limits. CNS currently takes Monthly samples and verifies EHC fluid is within OEM recommended limits (PMRQs 02031192-02 and Catawba Units 1 and 2 16.7-5-3 Revision 6
Turbine Overspeed Protection 16.7-5 BASES (continued) 02031193-02). Both CNS units start at a 4M frequency for all Turbine Valve Movement Testing, within OEM acceptable limits. Extending TVMT frequencies through calculation CNC 1200.00-00-0006, the TVMT PM strategy is to extend valve testing out in 3 month increments after a minimum of 2 iterations. These TVMT intervals may be increased until the frequency reaches a maximum of 18 months between TVMT tests.
The testing frequencies will be extended in accordance with the strategy given below until the maximum frequency is reached.
4M to 6M - Allow for testing at this interval and collect data (a minimum of 2 Turbine Valve Movement Tests at this frequency) 6M to 9M - Allow for testing at this interval and collect data (a minimum of 2 Turbine Valve Movement Tests at this frequency) 9M to 12M -Allow for testing at this interval and collect data (a minimum of 2 Turbine Valve Movement Tests at this frequency) 12M to 15M - Allow for testing at this interval and collect data (a minimum of 2 Turbine Valve Movement Tests at this frequency) 15M to 18M - Allow for testing at this interval and collect data (a minimum of 2 Turbine Valve Movement Tests at this frequency)
PMRQs that document current frequency and drive execution:
02031173 PT/1/A/4250/02B MAIN TURB VALVE MOV'T TEST 02031173-02-PT/1/A/4250/02C TURBINE CONTROL VALVE MOV'T TEST 02031172 PT/2/A/4250/02B MAIN TURB VALVE MOVEMENT TEST 02031172 PT/2/A/4250/02C TURBINE CONTROL VALVE MOVEMENT TEST Calculation CNC 1200.00-00-0006 also performed analysis on extending out mechanical and electrical (backup) trip testing, based on turbine missile probabilities. The calculation concludes that a maximum frequency of 2-Months on mechanical trip testing and 1-Month for electrical trip testing is allowable.. The maximum extensions for trip testing are based on requirements' that CNS extends the interval out in steps and no more than double of the previous test interval. The other recommendation is that CNS trend EHC fluid quality measurements to ensure fluid quality remains within acceptable limits. Extending trip test frequencies through calculation CNC 1200.00-00-0006, the Turbine Trip test PM strategy is to extend trip testing out no more than double of the previous test interval after a minimum of 2 iterations. The testing frequencies will be extended in accordance with the strategy given below until the maximum frequency is reached.
1W to 2W-Allow for testing at this interval and collect data (a minimum of 2 Turbine Trip Tests at this frequency) 2W to 1M - Allow for testing at this interval and collect data (a minimum of 2 Turbine Trip Tests at this frequency) 1M to 2M - This would only be optional for the mechanical trip testing upon a minimum of 2 successful mechanical trip tests.
Catawba Units 1 and 2 16.7-5-4 Revision 6
Turbine Overspeed Protection 16.7-5 BASES (continued)
PMRQs that document current frequency and drive execution:
02031173 PT/1/B/4250/02A MAIN TURBINE WEEKLY TRIP TEST 02031172 PT/2/B/4250/02A MAIN TURBINE WEEKLY TRIP TEST REFERENCES 1. CNC 1200.00-00-0006 Rev 000- Catawba Turbine Overspeed Protection System Maintenance and Test Interval Extension Assessment.
- 2. CNM 1200.00-0212.001 Rev 051 -Turbine Instruction Manual.
Catawba Units 1 and 2 16.7-5-5 Revision 6