NMP2L2658, Response to Request for Additional Information by the Office of Nuclear Reactor Regulation to Support Review of Nine Mile Point Nuclear Station, Unit 2, License Amendment Request to Adopt TSTF-542, Revision 2, Reactor Pressure Vessel Water

Response to Request for Additional Information by the Office of Nuclear Reactor Regulation to Support Review of Nine Mile Point Nuclear Station, Unit 2, License Amendment Request to Adopt TSTF-542, Revision 2, Reactor Pressure Vessel Water

ML17307A015
Person / Time
Site:	Nine Mile Point
Issue date:	11/03/2017
From:	Jim Barstow Exelon Generation Co, Exelon Nuclear
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
NMP2L2658
Download: ML17307A015 (13)

Text

Exelon Generation 200 Exelon Way Kennett Square. PA 19348 www.exeloncorp.com 10 CFR 50.90 NMP2L2658 November 3, 2017 U.S. Nuclear Regulatory Commission ATIN: Document Control Desk Washington, DC 20555-0001 Nine Mile Point Nuclear Station, Unit 2 Renewed Facility Operating License No. NPF-69 NRG Docket No. 50-410

Subject:

Response to Request for Additional Information by the Office of Nuclear Reactor Regulation to Support Review of Nine Mile Point Nuclear Station, Unit 2, License Amendment Request to Adopt TSTF-542, Revision 2, Reactor Pressure Vessel Water Inventory Control

References:

1. Letter from J. Barstow (Exelon Generation Company, LLC) to U.S.

Nuclear Regulatory Commission, "License Amendment Request-Revise Technical Specifications to Adopt TSTF-542, Reactor Pressure Vessel Water Inventory Control," dated February 28, 2017

2. Letter from M. Marshall (Senior Project Manager, U.S Nuclear Regulatory Commission) to Mr. B. Hanson (Exelon), "Nine Mile Point Nuclear Station, Unit 2-Request for Additional Information Regarding License Amendment Concerning Reactor Pressure Vessel Water Inventory Control (CAC No.

MF9357)," dated October 10, 2017 By letter dated February 28, 2017 (Reference 1), Exelon Generation Company, LLC (Exelon) requested to change the Nine Mile Point Unit 2 (NMP2) Technical Specifications (TS). The proposed amendment request would adopt Technical Specification Task Force (TSTF) -542, "Reactor Pressure Vessel Water Inventory Control."

On October 10, 2017 (Reference 2), the U.S. Nuclear Regulatory Commission (NRG) identified areas where additional information was necessary to complete the review.

Attachment 1 to this letter contains the NRC's request for additional information immediately followed by Exelon's response.

U.S. Nuclear Regulatory Commission Response to Request for Additional Information TSTF-542, Reactor Pressure Vessel Water Inventory Control, Docket No. 50-41 o November 3, 2017 Page2 Exelon has reviewed the information supporting a finding of no significant hazards consideration and the environmental consideration provided to the NRC in Reference 1.

The additional information provided in this response does not affect the bases for concluding that the proposed license amendment does not involve a significant hazards consideration.

Furthermore, the additional information provided in this response 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.

There are no commitments contained in this response.

If you should have any questions regarding this submittal, please contact Ron Reynolds at 610-765-5247.

I declare under penalty of perjury that the foregoing is true and correct. Executed on the 3rd day of November 2017.

Respectfully,

~OMV, James Barstow w::--

Director - Licensing & Regulatory Affairs Exelon Generation Company, LLC Attachments: 1) Response to Request for Additional Information

2) Response to Request for Additional Information - Revised Markup Pages

3) Response to Request for Additional Information - Revised Clean Pages cc: USNRC Region I Regional Administrator w/attachments USNRC Senior Resident Inspector - NMP USNRC Project Manager, NRR - NMP A. L. Peterson, NYSERDA

ATTACHMENT 1 Nine Mile Point Nuclear Station, Unit 2 Renewed Facility Operating License No. NPF-69 NRC Docket No. 50-410 Response to Request for Additional Information

Response to Request for Additional Information Attachment 1 TSTF-542, Reactor Pressure Vessel Water Inventory Control Page 1 of 2 Docket No. 50-41 O RAI (1):

In Table 3.3.5.2-1 (page 2 of 2), "RPV Water Inventory Control Instrumentation," of the TS mark-up, the "Manual Initiation" Function is designated "3.f." In the last sub-bullet on page 5 of the application, it is implied that the "Manual Initiation" Function should be designated as "3.e."

Clarify whether the designation for the "Manual Initiation" Function in Table 3.3.5.2-1 of the TS mark-up is "3.e" or "3.f."

Exelon Response to RAI (1)

Table 3.3.5.2-1, page 2 of 2, is revised to identify the Manual Initiation as Function 3.e. The associated markup in Attachment 2 and clean page in Attachment 3 are revised to identify the Manual Initiation as Function 3.e.

RAI (2):

In TS mark-up, the Limiting Condition for Operation 3.3.5.2, "RPV Water Inventory Control instrumentation," Condition E has two Required Actions. The first Required Action is designated "E.1." The other Required Action, which states "Restore channel to OPERABLE status," does not have a designation. What is the designation of the second required action?

Exelon Response to RAI (2)

The second required action for LCO 3.3.5.2 is E.2, "restore channel to OPERABLE status." The associated markup in Attachment 2 and clean page in Attachment 3 are revised to identify the second required action for LCO 3.3.5.2 as E.2.

RAI (3):

In Table 3.3.5.2-1 (page 1 of 2), "RPV Water Inventory Control Instrumentation," of the TS mark-up, the required channels per function for Function 2.a is "1 per pump." In the current version of the table in Nine Mile Point, Unit 2, TSs and the second bullet on page 4 of the application, the licensee states that the required channels per function for Function 2.a is "1 per valve." Also, "1 per pump" is an apparent variation from the TSTF-542, Revision 2, "Reactor Pressure Vessel Water Inventory Control." In the TS markup for TSTF-542, the required channels per function is "1." Clarify whether the required channels per function for Function 2.a in Table 3.3.5.2-1 of the TS mark-up is "1 per pump," "1 per valve," or "1." If the required channels per function is a variation from the TSTF, provide a discussion whether the variation affects the applicability of the TSTF.

Response to Request for Additional Information Attachment 1 TSTF-542, Reactor Pressure Vessel Water Inventory Control Page 2 of 2 Docket No. 50-41 O Exelon Response to RAI (3)

The required channels per function for Function 2.a in Table 3.3.5.2-1 of the technical specification mark-up is revised to "1" in accordance with TSTF-542, Revision 2. The associated markup in Attachment 2 and clean page in Attachment 3 are revised to identify the required channels per function for Function 2.a in Table 3.3.5.2-1 as "1."

RAI (4):

In Table 3.3.5.2-1 (page 1 of 2), "RPV Water Inventory Control Instrumentation," of the TS mark-up, the required channels per function for Function 1.d is "1." In TS markup for TSTF-542, the required channels per function is "1 per pump." The required channels per function of "1" is an apparent variation from the TSTF-542, Revision 2, and no discussion concerning the applicability of the TSTF is included in the application. Clarify whether the required channels per function for Function 1.d in Table 3.3.5.2-1 of the TS mark-up is "1" or "1 per pump." If the required channels per function is a variation from the TSTF, provide a discussion whether the variation affects the applicability of the TSTF.

Exelon Response to RAI (4)

The required channels per function for Function 1.d in Table 3.3.5.2-1 of the technical specification mark-up is revised to "1 per pump" in accordance with TSTF-542, Revision 2. The associated markup in Attachment 2 and clean page in Attachment 3 are revised to identify the required channels per function for Function 1.d in Table 3.3.5.2-1 as "1 per pump."

RAI (5):

In Table 3.3.6.2 (page 1 of 1), "Secondary Containment Isolation Instrumentation," of the TS mark-up, the third function is "Reactor Building Above the Refuel Floor Exhaust Radiation -

High." In the TS markup for TSTF-542, the third function is "Reactor Building Exhaust Radiation

- High." The third function in the TS markup appears to be a variation from the TSTF-542, Revision 2, and no discussion concerning the applicability of the TSTF is included in the application. Provide a discussion whether the apparent variation affects the applicability of the TSTF.

Exelon Response to RAI (5)

Table 3.3.6.2-1, page 1 of 1, Function 3 is a variation to TSTF-542, Revision 2.

The TSTF-542 Function 3, "Reactor Building Exhaust Radiation - High," is renamed to "Reactor Building Above the Refuel Floor Exhaust Radiation - High" to align with the same instrumentation name used at NMP2. This administrative change has no effect on the adoption of the TSTF-542 and is an acceptable variation.

ATTACHMENT 2 Nine Mile Point Nuclear Station, Unit 2 Renewed Facility Operating License No. NPF-69 NRG Docket No. 50-410 Response to Request for Additional Information Revised Markup Pages

RGIG Syste~RPV Water Inventory Control Instrumentation 3.3.5.2 ACTIONS (continued)

CONDITION REQUIRED ACTION COMPLETION TIME D. As required by Required D.1 Declare HPCS system 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> Action A.1 and referenced inoperable.

in Table 3.3.5.2-1.

OR D.2 Align the HPCS pump 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> suction to the suppression pool.

E. As required by Required E.1 Declare HPCS system 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> Action A.1 and referenced inoperable.

in Table 3.3.5.2-1.

AND c3J I ,f IRAI 2 I Restore channel to 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> OPERABLE status.

F. As required by Required F.1 Restore channel to 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> Action A.1 and referenced OPERABLE status.

in Table 3.3.5.2-1.

G. Required Action and G.1 Declare associated Immediately associated Completion ECCS injection/spray Time of Condition C, D, E, subsystem inoperable.

or F not met.

NMP2 3.3 .5.2-2 Amendment

RCIC SystemRPV Water Inventory Control Instrumentation 3.3.5.2 Table 3.3.5 2-1 (page 1 of 2)

RPV Water Inventory Control Instrumentation APPLICABLE CONDITIONS MODES OR REFERENCED OTHER REQUIRED FROM SPECIFIED CHANNELS PER REQUIRED SURVEILLANCE ALLOWABLE FUNCTION CONDITIONS FUNCTION ACTION A 1 REQUIREMENTS VALUE Low Pressure Coolant Injection-A (LPCI) and Low Pressure Core Spray (LPCS)

Subsystems a LPCS Differential 4, 5 1(a) c SR 3 3 5 2 1 ~ 40 ps1d and Pressure-Low SR 3 3 5 2 2 s 98 psid (Injection Permissive) b LPCI A Differential 4 5 1(a) c SR 3 3 5 2 1 ~ 70 psid and Pressure-Low SR 3 3 5 2 2 s 150 psid (Injection Permissive)

RAI 4

c LPCS Pump 4 5 1 per pump F SR 3 3 5 2 1 ~ 1000 gpm Discharge Flow-Low (a) SR 3 3 5 2 2 and (Bypass) s 1440 gpm d LPCI Pump A 4, 5 SR 3 3 5 2 1 ~ 770 gpm and Discharge Flow-Low F SR33522 s 930gpm (Bypass) e Manual Initiation 4. 5 1 per F SR 3.3 5 2 3 N/A subsystem (a)

RAI 3

2 LPCI Band LPCI C Subsystems a LPCI Band C 4 5 c SR 3 3 5 2 1 ~ 70 ps1d and Differential SR 3 3 5 2 2 s 150 ps1d Pressure-Low (Injection Permissive) b LPCI Pump Band 4. 5 1 per pump F SR 3.3.5-2 1 ~ 770 gpm LPCI Pump c (a) SR 3 3 5 2 2 and Discharge Flow-Low s 930 gpm (Bypass) c Manual Initiation 4. 5 1 per F SR 3 3 5 2 3 N/A subsystem (continued)

(a) Associated with an ECCS subsystem required to be OPERABLE by LCO 3.5.2, "Reactor Pressure Vessel Water Inventory Control" NMP2 3.3.5.2-4 Amendment

RGIG SystemRPV Water Inventory Control Instrumentation 3.3.5.2 Table 3 3 5 2-1 (page 2 of 2)

RPV Water Inventory Control Instrumentation APPLICABLE CONDITIONS MODES OR REFERENCED OTHER REQUIRED FROM SPECIFIED CHANNELS PER REQUIRED SURVEILLANCE ALLOWABLE FUNCTION CONDITIONS FUNCTION ACTION A 1 REQUIREMENTS VALUE 3 High Pressure Core Spray (HPCS) System 4, 5 1 (a) E SR 3 3 5 2 1 s 209 3 a Reactor Vessel SR 3 3 5.2 2 inches Water Level-High, Level8 4(b). 5(b) 1 (a) D SR 3 3 5 2 1 <:94 5 inches b Pump Suction SR 3 3 5 2 2 Hi O Pressure-Low c HPCS Pump 4, 5 1 per pump F SR 3 3 5 2 1 <: 220 ps1g Discharge (a) SR 3 3 5 2 2 Pressure-High RAI 1 (Bypass) (d) d HPCS System Flow 4, 5 F SR 3 3 5 2 1 > 580 gpm and Rate -Low (Bypass) 1 per pump SR 3 3 5 2.2 0'"" '" '" "

s 720 gpm (a) 4, 5 F SR 3 3 5 2 3 N/A (d) 1 per Subsystem (a) 4 RHR System Isolation a Reactor Vessel (c) 2 in one B SR3352 .1 <: 157 8 inches Water Level-Low Trip system SR 3 3 5 2 2 Level3

5. Reactor Water Cleanup (RWCU) System Isolation

a. Reactor Vessel (c) 2 in one B SR 3 3 5 2 1 <: 101 8 inches Water Level-Low Trip system SR 3 3 5 2 2 Low . Level 2 (a) Associated with an ECCS subsystem required to be OPERABLE by LCO 3 5 2 "Reactor Pressure Vessel Water Inventory Control."

(b) When HPCS is OPERABLE for compliance with LCO 3.5 2 , "RPV Water Inventory Control," and aligned to the condensate storage tank (c) When automatic isolation of the associated penetration flow path(s) 1s credited in calculating DRAIN TIME (d) The injection functions of Drywell Pressure-High and Manual Initiation are not required to be OPERABLE with reactor steam dome pressure less than 600 psig NMP2 3.3.5.2-5 Amendment

ATTACHMENT 3 Nine Mile Point Nuclear Station, Unit 2 Renewed Facility Operating License No. NPF-69 NRC Docket No. 50-410 Response to Request for Additional Information Revised Clean Pages

RPV Water Inventory Control Instrumentation 3.3.5.2 ACTIONS (continued)

CONDITION REQUIRED ACTION COMPLETION TIME D. As required by Required D.1 Declare HPCS system 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> Action A. 1 and referenced inoperable.

in Table 3.3.5.2-1 .

OR D.2 Align the HPCS pump 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> suction to the suppression pool.

E. As required by Required E.1 Declare HPCS system 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> Action A. 1 and referenced inoperable.

in Table 3.3.5.2-1 .

AND E.2 Restore channel to 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> OPERABLE status.

F. As required by Required F.1 Restore channel to 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> Action A. 1 and referenced OPERABLE status.

in Table 3.3.5.2-1.

G. Required Action and G.1 Declare associated Immediately associated Completion ECCS injection/spray Time of Condition C, D, E, subsystem inoperable.

or F not met.

NMP2 3.3.5. 2-2 Amendment

RPV Water Inventory Control Instrumentation 3.3.5.2 Table 3.3.5.2-1 (page 1 of 2)

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

1. Low Pressure Coolant Injection-A (LPCI) and Low Pressure Core Spray (LPCS)

Subsystems

a. LPCS Differential 4,5 1(a) c SR 3.3.5.2.1  :=: 40 psid and Pressure-Low SR 3.3.5.2.2 s 98 psid (Injection Permissive)

b. LPCI A Differential 4,5 1(a) c SR 3.3.5.2.1  :=: 70 psid and Pressure-Low SR 3.3.5.2.2 s 150 psid (Injection Permissive)

c. LPCS Pump 4, 5 1 per pump F SR 3.3.5.2.1  :=: 1000 gpm Discharge Flow-Low (a) SR 3.3.5.2.2 and (Bypass) s 1440 gpm

d. LPCI Pump A 4,5 1 per pump SR 3.3.5.2.1  :=: 770 gpm and Discharge Flow-Low (a) F SR 3.3.5.2.2 s 930 gpm (Bypass)

e. Manual Initiation 4,5 1 per F SR 3.3.5.2.3 NIA subsystem (a)

2. LPCI B and LPCI C Subsystems

a. LPCI Band C 4, 5 1(a) c SR 3.3.5.2.1  :=: 70 psid and Differential SR 3.3.5.2.2 s 150 psid Pressure-Low (Injection Permissive)

b. LPCI Pump B and 4, 5 1 per pump F SR 3.3.5.2.1  :=: 770 gpm LPCI Pump C (a) SR 3.3.5.2.2 and Discharge Flow-Low s 930 gpm (Bypass)

c. Manual Initiation 4,5 1 per F SR 3.3.5.2.3 NIA subsystem (continued)

(a) Associated with an ECCS subsystem required to be OPERABLE by LCO 3.5.2, "Reactor Pressure Vessel Water Inventory Control."

NMP2 3.3.5.2-4 Amendment

RPV Water Inventory Control Instrumentation 3.3.5.2 Table 3.3.5.2-1 (page 2 of 2)

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

3. High Pressure Core Spray (HPCS) System 4, 5 1 (a) E SR 3.3.5.2.1 s 209.3

a. Reactor Vessel SR 3.3.5.2.2 inches Water Level-High, Level8 4(b), 5(b) 1 (a) D SR 3.3.5.2.1 2:94.5 inches

b. Pump Suction SR 3.3.5.2.2 H20 Pressure-Low

c. HPCS Pump 4, 5 1 per pump F SR 3.3.5.2.1 2: 220 psig Discharge (a) SR 3.3.5.2.2 Pressure-High (Bypass) (d)

d. HPCS System Flow 4,5 F SR 3.3.5.2.1 > 580 gpm and Rate-Low (Bypass) 1 per pump SR 3.3.5.2.2 s 720 gpm (a)

e. Manual Initiation (d) 4,5 F SR 3.3.5.2.3 N/A 1 per Subsystem (a)

4. RHR System Isolation

a. Reactor Vessel (c) 2 in one B SR 3.3.5.2.1 2: 157.8 inches Water Level-Low, Trip system SR 3.3.5.2.2 Level3

5. Reactor Water Cleanup (RWCU) System Isolation

a. Reactor Vessel (c) 2 in one B SR 3.3.5.2.1 2: 101 .8 inches Water Level-Low Trip system SR 3.3.5.2.2 Low, Level 2 (a) Associated with an ECCS subsystem required to be OPERABLE by LCO 3.5.2, "Reactor Pressure Vessel Water Inventory Control."

(b) When HPCS is OPERABLE for compliance with LCO 3.5.2, "RPV Water Inventory Control," and aligned to the condensate storage tank.

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

(d) The injection functions of Drywell Pressure-High and Manual Initiation are not required to be OPERABLE with reactor steam dome pressure less than 600 psig.

NMP2 3.3.5.2-5 Amendment