ML19150A259
| ML19150A259 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 05/29/2019 |
| From: | Rasmussen M Tennessee Valley Authority |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| Download: ML19150A259 (9) | |
Text
Tennessee Valley Authority, Sequoyah Nuclear Plant, P.O. Box 2000, Soddy Daisy, Tennessee 37384 May 29, 2019 10CFR50.4 10 CFR 50.71(e)
ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, D.C. 20555-0001 Sequoyah Nuclear Plant, Units 1 and 2 Renewed Facility Operating License Nos. DPR-77 and DPR-79 NRC Docket Nos. 50-327 and 50-328
Subject:
Revisions to the Sequoyah Nuclear Plant Units 1 and 2 Technical Requirements Manual
References:
- 1. NRC Letter to TVA, "Issuance of Exemption to 10 CFR [50.] 71(e)(4) for the Sequoyah Nuclear Plant, Units 1 and 2 (TAC Nos. MA0646 and MA0647),"
dated March 9, 1998
- 2. TVA Letter to NRC, "Revisions to the Sequoyah Nuclear Plant Technical Requirements Manual," dated November 28, 2017 Pursuant to 10 CFR 50.71(e) and the Reference 1 letter, updates to the Sequoyah Nuclear Plant (SQN) Updated Final Safety Analysis Report (UFSAR) for both Units 1 and 2 are to be submitted within 180 days following each Unit 2 refueling outage, but not to exceed 24 months between successive revisions. The SQN Technical Requirements Manual (TRM) is incorporated by reference into the SQN UFSAR. This letter provides NRC updates to the TRM since the update provided in the Reference 2 letter. The last Unit 2 refueling outage ended on December 8, 2018, and as such these updates are required by June 6, 2019. The enclosure to this letter provides a description of the TRM revisions with attachments of the updated pages.
printed on recycled paper
U.S. Nuclear Regulatory Commission Page 2 May 29, 2019 There are no new regulatory commitments contained in this letter. If you have any questions, please contact Mr. Jonathan Johnson, SQN Licensing Manager, at (423) 843-8129.
I certify that I am duly authorized by TVA, and that, to the best of my knowledge and belief, the information contained herein accurately presents changes made since the previous submittal, necessary to reflect information and analyses submitted to the Commission or prepared pursuant to Commission requirements.
Respectfully, w-Matthew Rasmussen Site Vice President Sequoyah Nuclear Plant
Enclosure:
Description of Revisions for the Sequoyah Nuclear Plant (SQN) Units 1 and 2, Technical Requirements Manual (TRM) cc (Enclosure):
NRC Regional Administrator - Region II NRC Senior Resident Inspector- Sequoyah Nuclear Plant
ENCLOSURE DESCRIPTION OF REVISIONS FOR THE SEQUOYAH NUCLEAR PLANT (SQN)
UNITS 1 AND 2, TECHNICAL REQUIREMENTS MANUAL (TRM)
Technical Requirements Manual (TRM) Revisions TRM Revision 60 was approved on June 8, 2018, and implemented on June 15, 2018. The change revised Technical Requirement (TR) 8.7.5, "Heating, Ventilating, and Air Conditioning (HVAC) Maintenance Rule Equipment Risk Significant" Bases. Table 8.7.5-1 lists HVAC Equipment to be monitored for Maintenance Rule Unavailability in accordance with 10 CFR 50.65 "Requirements for Monitoring the Effectiveness of Maintenance at Nuclear Power Plants." The Bases describes this HVAC Equipment as "Risk Significant" and therefore in scope of the Maintenance Rule Program. However, some equipment has been identified as no longer "Risk Significant." The change to the Bases removes the description of "Risk Significanf equipment, yet continues to track HVAC Equipment unavailability, but specifies that Site Engineering will determine equipment unavailability times within scope the Maintenance Rule Program.
TRM Revision 61 was approved on February 21, 2019, and implemented on February 27, 2019.
This revision changed TR 8.7.5 by deleting "6.9 kV" from the HVAC Equipment listed as "6.9 kV Shutdown Board Room Cooling Systems." The change was made to clarify that the Shutdown Board Room Cooling Systems provides cooling for both 480V and 6.9 kV shutdown board rooms.
Attachment:
Sequoyah Nuclear Plant, Technical Requirements Manual - Changed Pages E1-1
ATTACHMENT SEQUOYAH NUCLEAR PLANT TECHNICAL REQUIREMENTS MANUAL CHANGED PAGES TRM Affected Pages EPL-5 EPL-9 8.7.5-2 8.7.5-3 8.7.5-4
SEQUOYAH NUCLEAR PLANT UNITS 1 AND 2 TECHNICAL REQUIREMENTS MANUAL EFFECTIVE PAGE LISTING Page Revision 8.7.2-3 10/23/15 8.7.3-1 10/23/15 8.7.3-2 10/23/15 8.7.3-3 10/23/15 8.7.3-4 10/23/15 8.7.3-5 10/23/15 8.7.3-6 10/23/15 8.7.3-7 10/23/15 8.7.3-8 10/23/15 8.7.3-9 10/23/15 8.7.3-10 10/23/15 8.7.3-11 10/23/15 8.7.3-12 10/23/15 8.7.3-13 10/23/15 8.7.3-14 10/23/15 8.7.4-1 10/23/15 8.7.4-2 10/23/15 8.7.4-3 10/23/15 8.7.5-1 10/23/15 8.7.5-2 02/21/19 8.7.5-3 06/08/18 8.7.5-4 02/21/19 8.7.6-1 10/23/15 8.7.6-2 10/23/15 EPL-5 February 21, 2019
SEQUOYAH NUCLEAR PLANT UNITS 1 AND 2 TECHNICAL REQUIREMENTS MANUAL REVISION LISTING Revision Date Revision 50 11/25/15 Revision 51 07/01/16 Revision 52 08/29/16 Revision 53 08/31/16 Revision 54 09/27/16 Revision 55 10/07/16 Revision 56 04/04/16 Revision 57 01/27/17 Revision 58 04/24/17 Revision 59 08/23/17 Revision 60 06/08/18 Revision 61 02/21/19 EPL-9 February 21, 2019
SEQUOYAH UNITS 1 AND 2 TRM 8.7.5 TECHNICAL REQUIREMENTS MANUAL Revision 61 February 21, 2019 Table 8.7.5-1 HVAC Maintenance Rule Equipment EQUIPMENT COMPONENTS APPLICABLE MODES Electrical Board Room A Train chiller and air ALL MODES 1.
Cooling, A Train handling unit Electric Board Room B Train chiller and air ALL MODES 2.
Cooling, B Train handling unit Shutdown Board Room A Train chiller, chilled water ALL MODES 3.
Cooling, A Train system, and 1A and 2A air handling units Shutdown Board Room B Train chiller, chilled water ALL MODES 4.
Cooling, B Train system, and 1B and 2B air handling units 1A 480 V Electric Board 1A chiller, condensing and ALL MODES 5.
Room Cooling air handling units 1B 480 V Electric Board 1B chiller, condensing and ALL MODES 6.
Room Cooling air handling units 2A 480 V Electric Board 2A chiller, condensing and ALL MODES 7.
Room Cooling air handling units 2B 480 V Electric Board 2B chiller, condensing and ALL MODES 8.
Room Cooling air handling units 1A 480 V Transformer 1A1-A, 1A2-A, 1A3-A, and ALL MODES 9.
Room Ventilation 1A4-A exhaust fans 1B 480 V Transformer 1B1-B, 1B2-B, and1B3-B ALL MODES 10.
Room Ventilation exhaust fans 2A 480 V Transformer 2A1-A,2A2-A, and 2A3-A ALL MODES 11.
Room Ventilation exhaust fans 2B 480 V Transformer 2B1-B, 2B2-B, 2B3-B, and ALL MODES 12.
Room Ventilation 2B4-B exhaust fans Thermal Barrier Booster A Train Cooler MODES 1,2,3, and 4 13.
Pump & Spent Fuel Pit Pump Cooler, A Train 14.
Thermal Barrier Booster B Train Cooler MODES 1,2,3, and 4 Pump & Spent Fuel Pit Pump Cooler, B Train 8.7.5-2
SEQUOYAH UNITS 1 AND 2 TRM 8.7.5 TECHNICAL REQUIREMENTS MANUAL Revision 60 June 8, 2018 8.7 PLANT SYSTEMS 8.7.5 Heating, Ventilating, and Air Conditioning (HVAC) Maintenance Rule Equipment BASES BACKGROUND The HVAC equipment listed in Table 8.7.5-1 is required to be tracked for unavailability by Sequoyah's implementation of 10 CFR 50.65, "Requirements for Monitoring the Effectiveness of Maintenance at Nuclear Power Plants." The Maintenance Rule program requires that the time this equipment is Nonfunctional, be monitored, whether due to an unplanned failure or planned maintenance. The required FUNCTIONALITY of the HVAC equipment is commensurate with the required OPERABILITY of the equipment being cooled. Engineering will trend the unavailability of the equipment as required based on "Risk Significance" of the equipment. The final Maintenance Rule unavailability time will be determined by Engineering. The equipment listed in Table 8.7.5-1 has no Technical Specification LCO or other associated TRM contingency measures for FUNCTIONALITY. Therefore, this TRM was created to provide indication for the unavailability of this HVAC equipment, and to assist in the tracking and trending of the total unavailability time.
APPLICABLE The design basis of this HVAC equipment is to maintain the temperature SAFETY of the area, to which the associated equipment provides cooling, below ANALYSES the design basis limits as described in the Environmental Design Criteria SQN-DC-V-21.0.
This TRM is being implemented for tracking purposes only and there is no associated Safety Analysis affected or implemented by this change.
TECHNICAL This TR is being implemented to track the unavailability time of the REQUIREMENT associated HVAC equipment. This equipment is considered to be FUNCTIONAL when the individual components necessary to maintain the associated area temperature below the design required limits are FUNCTIONAL. These components include the chiller package, cooling coils, air handling unit, pumps, fan, dampers, instrumentation, and controls as applicable to the various systems.
8.7.5-3
SEQUOYAH UNITS 1 AND 2 TRM 8.7.5 TECHNICAL REQUIREMENTS MANUAL Revision 61 February 21, 2019 BASES APPLICABILITY Cooling for the Electric Board Rooms, Shutdown Board Rooms, 480 V Electric Board Rooms and ventilation to the 480 V Transformer Rooms is required for all MODES due to the commonality of the equipment served, requirements for accident mitigation, and the ability to cross tie the 480V board room cooling between Units 1 & 2. Cooling to the Thermal Barrier Booster Pump & Spent Fuel Pit Pump Area is only required in MODES 1, 2, 3, and 4 for the applicable Unit.
CONTINGNECY With any of the equipment listed in Table 8.7.5-1 Nonfunctional, the MEASURES corresponding TR for that Unit and Train of equipment shall be entered into the Operation narrative logs and LCO tracking logs for tracking the unavailability time.
TECHNICAL This TR is for tracking purposes only. There are no Technical REQUIREMENTS Requirements Verification associated with this TR.
VERIFICATION REFERENCES 1. NPG-SPP-03.4, "Maintenance Rule Performance Indicator Monitoring, Trending and Reporting -10 CFR 50.65."
- 2. TI-4, Maintenance Rule Performance Indicator Monitoring, Trending, and Reporting -10 CFR 50.65." Attachment 7, "Heating, Ventilation and Air Conditioning - System 30."
- 3. SQN-DC-V-21.0, "Sequoyah Nuclear Plant - Environmental Design Criteria."
8.7.5-4