RS-17-174, Additional Supplement to Dresden Nuclear Power Station, Units 2 and 3 - Application to Revise Technical Specifications to Adopt TSTF-542, Reactor Pressure Vessel Water Inventory Control

Additional Supplement to Dresden Nuclear Power Station, Units 2 and 3 - Application to Revise Technical Specifications to Adopt TSTF-542, Reactor Pressure Vessel Water Inventory Control

ML17356A134
Person / Time
Site:	Dresden
Issue date:	12/21/2017
From:	Simpson P Exelon Generation Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
RS-17-174
Download: ML17356A134 (6)

Text

~- 4300 Winfield Road Warrenville, IL 60555 ExeLon Generation. 630 657 2000 Office RS-17-174 10 CFR 50.90 December 21, 2017 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 20555-0001 Dresden Nuclear Power Station, Units 2 and 3 Renewed Facility Operating License Nos. DPR-19 and DPR-25 NRC Docket Nos. 50-237 and 50-249

Subject:

Additional Supplement to Dresden Nuclear Power Station, Units 2 and 3 Application to Revise Technical Specifications to Adopt TSTF-542, "Reactor Pressure Vessel Water Inventory Control"

References:

(1) Letter from P. R. Simpson (Exelon Generation Company, LLC (EGC)) to NRC, "Application to Revise Technical Specifications to Adopt TSTF-542,

'Reactor Pressure Vessel Water Inventory Control,"' dated February 10, 2017 (3) Letter from P. . Simpson (EGC) to NRC, "Supplement to Dresden Nuclear Power Station. Units 2 and 3 Application to Revise Technical Specifications to Adopt TSTF-542, 'Reactor Pressure Vessel Water Inventory Control,"' dated December 20, 2017 In Reference 1, Exelon Generation Company, LLC (EGC) submitted a request for amendments to the Technical Specifications (TS) for Dresden Nuclear Power Station (DNPS), Units 2 and 3.

Specifically, EGC requested that the NRC complete its review and approval of a request to adopt TSTF-542.

In Reference 2, EGC provide supplemental information related to its Reference 1 request.

Upon further consideration of one of the TS markup pages and the corresponding revised TS page provided in Reference 2, Attachments 1 and 2 (i.e., TS Pages 3.3.5.2-3), EGC has determined that these pages should be revised. Specifically, TS Table 3.3.5.2-1, Footnote (a) should be associated with the Required Channels Per Function Column for Function 1.a, "Core Spray System Reactor Steam Dome Pressure-Low (Permissive)," Function 1.b, "Core Spray Pump Discharge Flow-Low (Bypass)," Function 2.a, "Low Pressure Coolant Injection System Reactor Steam Dome Pressure-Low (Permissive)," and Function 2.b, "Low Pressure Coolant Injection Pump Discharge Flow-Low (Bypass)," but not the Applicable Modes or Other Specified Conditions column. A proposed TS markup page and revised TS page reflecting this change

December 21, 2017 U.S. Nuclear Regulatory Commission Page 2 EGC has reviewed the information supporting a finding of no significant hazards consideration, and the environmental consideration, that were previously provided to the NRC in Reference 1.

The additional information provided in this submittal does not affect the bases for concluding that the proposed license amendment does not involve a significant hazards consideration. In addition, the information provided in this submittal does not affect the bases for concluding that neither an environmental impact statement nor an environmental assessment needs to be prepared in connection with the proposed amendment.

EGC is notifying the State of Illinois of this supplement to a previous application for a change to the TS by sending a copy of this letter and its attachment to the designated State Official in accordance with 10 CFR 50.91, "Notice for public comment; State consultation," paragraph (b).

There are no regulatory commitments contained within this letter. Should you have any questions concerning this letter, please contact Mr. Mitchel A. Mathews at (630) 657-2819.

1 declare under penalty of perjury that the foregoing is true and correct. Executed on the 21St day of December 2017.

Respectfully, Patrick R. Simpson Manager Licensing Exelon Generation Company, LLC Attachments: 1. Proposed Technical Specifications Changes (Mark-Up)

2. Revised Technical Specifications Pages cc: NRC Regional Administrator, Region III NRC Senior Resident Inspector Dresden Nuclear Power Station Illinois Emergency Management Agency Division of Nuclear Safety

Dresden Nuclear Power Station, Units 2 and 3 Additional Supplement to Dresden Nuclear Power Station, Units 2 and 3 Application to Revise Technical Specifications to Adopt TSTF-542, "Reactor Pressure Vessel Water Inventory Control" ATTACHMENT 1 - PROPOSED TECHNICAL SPECIFICATIONS CHANGES (MARK-UP) 3.3.5.2-3

RPV Water Inventory Control Instrumentation 3.3.5.2 Table 3.3.5.2-1 (Page 1 of 1)

RPV Water Inventory Control Instrumentation APPLICABLE CONDITIONS MODES REFERENCED OR OTHER REQUIRED FROM SPECIFIED CHANNELS PER REQUIRED SURVEILLANCE ALLOWABLE FUNCTION CONDITIONS FUNCTION ACTION A.1 REQUIREMENTS VALUE

1. Core Spray System

a. Reactor Steam Dome 4, 5 2 (a) C SR 3.3.5.2.2 s 341.7 psi PressureLow (Permissive)

b. Core Spray Pump 4, 5 1 per D SR 3.3.5.2.2 z 802 gpm Discharge FlowLow pump (a) and (Bypass) s 992 gpm

2. Low Pressure Coolant Injection (LPCI) System

a. Reactor Steam Dome 4, 5 2 (a) C SR 3.3.5.2.2 _< 341.7 psi PressureLow (Permissive)

b. Low Pressure Coolant 4, 5 1 per D SR 3.3.5.2.2 1107 gpm Injection Pump loop (a)

Discharge FlowLow (Bypass)

3. Shutdown Cooling System (SDC) Isolation

a. Reactor Vessel Water (b) 1 per trip B SR 3.3.5.2.1 _>2.65 inches LevelLow system SR 3.3.5.2.2

4. Reactor Water Cleanup System Isolation

a. Reactor Vessel Water (b) 1 per trip B SR 3.3.5.2.1 z 2.65 inches LevelLow system SR 3.3.5.2.2 (a) Associated with an ECCS subsystem required to be OPERABLE by LCO 3.5.2, "RPV Water Inventory Control."

(b) When automatic isolation of the associated penetration flow path(s) is credited in calculating DRAIN TIME.

Dresden 2 and 3 3.3.5.2-3 Amendment No.

Dresden Nuclear Power Station, Units 2 and 3 Additional Supplement to Dresden Nuclear Power Station, Units 2 and 3 Application to Revise Technical Specifications to Adopt TSTF-542, "Reactor Pressure Vessel Water Inventory Control" ATTACHMENT 2 - REVISED TECHNICAL SPECIFICATIONS PAGES 3.3.5.2-3 3.5.2-3

RPV Water Inventory Control Instrumentation 3.3.5.2 Table 3.3.5.2-1 (Page 1 of 1)

RPV Water Inventory Control Instrumentation APPLICABLE CONDITIONS MODES REFERENCED OR OTHER REQUIRED FROM SPECIFIED CHANNELS PER REQUIRED SURVEILLANCE ALLOWABLE FUNCTION CONDITIONS FUNCTION ACTION A.1 REQUIREMENTS VALUE

1. Core Spray System

a. Reactor Steam Dome 4, 5 2 (a) C SR 3.3.5.2.2 s 341.7 psig PressureLow (Permissive)

b. Core Spray Pump 4, 5 1 per D SR 3.3.5.2.2 >_ 802 gpm Discharge FlowLow pump (a) and (Bypass) < 992 gpm

2. Low Pressure Coolant Injection (LPCI) System

a. Reactor Steam Dome 4, 5 2 (a) C SR 3.3.5.2.2 < 341.7 psig PressureLow (Permissive)

b. Low Pressure Coolant 4, 5 1 per D SR 3.3.5.2.2 >_ 1107 gpm Injection Pump loop (a)

Discharge FlowLow (Bypass)

3. Shutdown Cooling System (SDC) Isolation

a. Reactor Vessel Water (b) 1 per trip B SR 3.3.5.2.1 >_ 2.65 inches LevelLow system SR 3.3.5.2.2

4. Reactor Water Cleanup System Isolation

a. Reactor Vessel Water (b) 1 per trip B SR 3.3.5.2.1 >_ 2.65 inches LevelLow system SR 3.3.5.2.2 (a) Associated with an ECCS subsystem required to be OPERABLE by LCO 3.5.2, "RPV Water Inventory Control."

(b) When automatic isolation of the associated penetration flow path(s) is credited in calculating DRAIN TIME.

Dresden 2 and 3 3.3.5.2-3 Amendment No.