ML17362A043

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North Anna and Surry Power Stations, Units 1 and 2 - Anchor Darling Double Disc Gate Valve Information and Status
ML17362A043
Person / Time
Site: Millstone, Surry, North Anna  Dominion icon.png
Issue date: 12/18/2017
From: Sartain M D
Dominion Energy Nuclear Connecticut, Virginia Electric & Power Co (VEPCO)
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
17-343A
Download: ML17362A043 (14)
v • d • e


Text

Dominion Energy Services, Inc. 5000 Dominion Boulevard, Glen Allen, VA 23060 December 18, 2017 Dominion Energy.com United States Nuclear Regulatory Commission Attention:

Document Control Desk Washington, D.C. 20555-0001 Dominion P' Energy Serial No.: NRA/GDM: Docket Nos.: License Nos.: 17-343A R1 50-336/423 50-338/339 50-280/281 DPR-65/NPF-49 NPF-4n DPR-32/37 VIRGINIA ELECTRIC AND POWER COMPANY (DOMINION ENERGY VIRGINIA)

DOMINION NUCLEAR CONNECTICUT, INC. MILLSTONE POWER STATION UNITS 2 AND 3 NORTH ANNA AND SURRY POWER STATIONS UNITS 1 AND 2 ANCHOR DARLING DOUBLE DISC GATE VALVE INFORMATION AND STATUS

References:

1) Letter from Greg Krueger (NEI) to John Lubinski (U.S. Nuclear Regulatory Commission), "Anchor Darling Double Disc Gate Valve Industry Resolution Plan Update (Project 689)," dated August 4, 2017 2) Letter from Joe Pollock (NEI) to Brian Holian (U.S. Nuclear Regulatory Commission), "NSIAC Concurrence on Anchor Darling Double Disc Gate Valve Industry Response Actions (Project 689)," dated October 26,2017 3) BWROG Topical Report TP-16-1-112, Revision 4, "Recommendations to Re*solve Flowserve 10 CFR Part 21 Notification Affecting Anchor Darling Double Disc Gate Valve Wedge Pin Failure" . ' In Reference 1, the Nuclear Energy Institute (NEI) provided the NRC a resolution plan for the U.S. Nuclear Industry to address the known Anchor Darling Double Disk Gate Valve (ADDDGV) issues. Reference 2 indicated each utility would provide a listing of their Anchor Darling valve population with active safety functions along with relevant valve information, including the results of susceptibility evaluations, repair status, and a repair schedule for each susceptible valve not yet repaired.

This letter serves to provide this information for Millstone Power Station (MPS) Units 2 and 3, and North Anna and Surry Power Stations (NAPS and SPS, respectively)

Units 1 and 2. The attachments to this letter contain the following information for each ADDDGV:

  • Plant Name, Unit, and Valve ID.
  • System.
  • Valve FunctionaLDescription.
  • Valve Size.

Serial No. 17-343A Docket Nos. 50-336/423/338/339/280/281 Page 2 of 3

  • Active Safety Function (Open, Close, Both).
  • Are multiple design basis post-accident strokes required (Yes/No)?
  • Expert Panel Risk Ranking (High, Medium, Low).
  • Result of Susceptibility Evaluation (Susceptible or Not Susceptible).
  • Is the susceptibility evaluation in general conformance with TP16-1-112R4 (Reference 3)?
  • Does the susceptibility evaluation rely on thread friction?

If yes, was the COF greater than 0.1 O? For cases where thread-friction was relied upon, information is provided whether the coefficient of friction was above or below 0.1 .

  • Was an initial stem-rotation check performed?

If yes, include rotation criteria (i.e., S10 degrees or S5 degrees).

  • Was the diagnostic test data reviewed for failure precursors described in TP16-1-112R4 (Reference 3)?
  • Valve Repair Status (i.e., Repaired or Not Repaired).
  • Repair Schedule for Each Susceptible Valve. Regarding the last bullet, as noted in the attachments, no susceptible valves were identified during our review in addition to those included in our August 31, 2017 letter (ADAMS Accession No. ML 17250A157).

Consequently, repair schedules for the listed valves are not included.

Should you have any questions or require additional information, please contact Mr. Gary D. Miller at (804) 273-2771.

Respectfully, Mark D. Sartain Vice President

-Nuclear Engineering and Fleet Support Virginia Electric and Power Company Dominion Energy Nuclear Connecticut, Inc. Summary of Regulatory Commitments:

No new regulatory commitments are contained in this letter. Attachments:

1. Anchor Darling Double Disc Gate Valve Information and Status -Millstone Power Station Units 2 and 3 2. Anchor Darling Double Disc Gate Valve Information and Status -North Anna Power Station Units 1 and 2 3. Anchor Darling Double Disc Gate Valve Information and Status -Surry Power Station Units 1 and 2 Serial No. 17-343A Docket Nos. 50-336/423/338/339/280/281 Page 3 of 3 cc: U.S. Nuclear Regulatory Commission

-Region I 2100 Renaissance Blvd, Suite 100 King of Prussia, Pennsylvania 19406 -2713 U.S. Nuclear Regulatory Commission

-Region II Marquis One Tower 245 Peachtree Center Ave., NE Suite 1200 Atlanta, Georgia 30303-1257 NRC Senior Resident Inspector Millstone Power Station NRC Senior Resident Inspector North Anna Power Station NRG Senior Resident Inspector Surry Power Station Mr. R. Guzman NRG Senior Project Manager -Millstone U.S. Nuclear Regulatory Commission One White Flint North Mail Stop 08 C2 11555 Rockville Pike Rockville, Maryland 20852-2738 Mr. J. R. Hall NRC Senior Project Manager -North Anna U.S. Nuclear Regulatory Commission One White Flint North Mail Stop 08 B1A 11555 Rockville Pike Rockville, Maryland 20852-2738 Ms. K. R. Cotton Gross NRG Project Manager -Surry U. S. Nuclear Regulatory Commission One White Flint North Mail Stop 08 G9A 11555 Rockville Pike Rockville, Maryland 20852-2738 Attachment 1 Serial No. 17-343A Docket Nos. 50-336/423 ADDDGV Information and Status ANCHOR DARLING DOUBLE DISC GATE VALVE INFORMATION AND STATUS Dominion Nuclear Connecticut, Inc. Millstone Power Station Units 2 and 3 MPS 2 MPS 2 MPS 2 MPS 2 MPS 2 MPS 2 2-CS-4.lA 2-CS-4.lB 2-CS-13.lA 2-CS-13.lB 2-CS-16.lA 2-CS-16.lB Containment Spray Containment Spray Containment Spray Containment Spray Containment Spray Containment Spray "A" Containment Spray Header Isolation Valve "B" Containment Spray Header Isolation Valve RWST Outlet Header "A" Isolation Valve RWST Outlet Header "B" Isolation Valve Containment Sump Outlet Header "A" Isolation Valve Containment Sump Outlet Header "B" Isolation Valve 8 Both 8 Both 18 Close 18 Close 24 Both 24 Both *:=:*=* .. -.::.*:>():>,_.::,*.,::.:-:::<::-:***):,::'.

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Not Susceptible Yes Yes, >0.10 Not Susceptible Yes Yes, >0.10 Not Susceptible Yes Yes, >0.10 Not Susceptible Yes Yes, >0.10 Not Susceptible Yes Yes, <0.10 Not Susceptible Yes Yes, <0.10 No No No No

  • No No Serial No. 17-343A Docket Nos. 50-336/423 ADDDGV Information and Status Attachment 1 Page 1 of 1 Yes Not repaired Yes Not repaired Yes Not repaired Yes Not repaired Yes Not repaired Yes Not repaired Attachment 2 Serial No. 17-343A Docket Nos. 50-338/339 ADDDGV Information and Status ANCHOR DARLING DOUBLE DISC GATE VALVE INFORMATION AND STATUS Virginia Electric and Power Company (Dominion Energy Virginia)

North Anna Power Station Units 1 and 2 NAPS NAPS NAPS NAPS 1 NAPS NAPS NAPS 2 1-RH-MOV-1720A 1-RH-MOV-1720B 1-SI-MOV-1890A 1-SI-MOV-1890B 1-SI-MOV-1890C 1-SI-MOV-1890D 2-RH-MOV-2720A Residual Heat Removal Residual Heat Removal Safety Injection Safety Injection Safety Injection Safety Injection Residual Heat Removal Residual Heat Removal to "B" RCS Loop Residual Heat Removal to "C" RCS Loop Low Head Safety Injection Hot Leg .Injection Valve Low Head Safety Injection Hot Leg Injection Valve Low Head Safety Injection Cold Leg Injection Valve Low Head Safety Injection Cold Leg Injection Valve Residual Heat Removal to "B" RCS Loop 10X8X10 10X8X10 10X8X10 10X8X10 10X8X10 10X8X10 10X8X10 Open No Open No Both Yes Both Yes Both Yes Both Yes Open No Medium Not Susceptible Yes Medium Not Susceptible Yes Low Not Susceptible Yes Low Not Susceptible Yes Low Not Susceptible Yes Low Not Susceptible Yes Medium Not Susceptible Yes Yes, >0.10 No Yes, >0.10 No Yes, >0.10 No Yes, >0.10 No Yes, >0.10 No Yes, >0.10 No Yes, >0.10 Yes,55 deg. Serial No. 17-343A Docket Nos. 50-338/339 ADDDGV Information and Status Attachment 2 Page 1 of 2 Yes Not repaired Yes Not repaired Yes Not repaired Yes Not repaired Yes Not repaired Yes Not repaired Yes Not repaired NAPS 2 NAPS 2 NAPS 2 NAPS 2 NAPS 2 2-RH-MOV-2720B 2-SI-MOV-2890A 2-SI-MOV-2890B 2-SI-MOV-2890C 2-SI-MOV-2890D Residual Heat Removal Safety Injection Safety Injection Safety Injection Safety Injection Residual Heat Removal to "C" RCS Loop Low Head Safety Injection Hot Leg Injection Valve Low Head Safety Injection Hot Leg Injection Valve Low Head Safety Injection Cold Leg Injection Valve Low Head Safety Injection Cold Leg Injection Valve 10X8Xl0 10X8X10 10X8X10 10X8X10 10X8X10 Open No Medium Both Yes Low Both Yes Low Both Yes Low Both Yes Low Applied Wedge Pin Torque must bound anticipated design basis operating torque requirements and current maximum total torque. Not Susceptible<

2 J Yes Not Susceptible Yes Not Susceptible Yes Not Susceptible Yes Not Susceptible Yes (1) The repair of this MOV included upgrading the pin material to Inconel 718 and torquing the stem/wedge connection to a satisfactory value to support an anticipated design basis operating torque. (2) This valve was considered susceptible in the August 31, 2017 response letter. Re-evaluation to the BWROG guidance indicates this valve is not susceptible, but the commitment to repair is not being changed. Yes, >0.10 Yes, .:,;5 deg. Yes, >0.10 Yes, .:,;5 deg. Yes, >0.10 Yes, .:,;5 deg. Yes, >0.10 Yes, .:,;5 deg. Yes, >0.10 Yes,.:,;5 deg. Serial No. 17-343A Docket Nos. 50-338/339 ADDDGV Information and Status Attachment 2 Page 2 of 2 Yes Not repaired Yes Repaired(!)

Yes Not repaired Yes Not repaired Yes Not repaired Attachment 3 Serial No. 17-343A Docket Nos. 50-280/281 ADDDGV Information and Status ANCHOR DARLING DOUBLE DISC GATE VALVE INFORMATION AND STATUS Virginia Electric and Power Company (Dominion Energy Virginia)

Surry Power Station Units 1 and 2 J SPS SPS SPS SPS 1 SPS 1 SPS 01-CH-MOV-1289A 01-CH-MOV-1289B 01-RH-MOV-1720A 01-RH-MOV-1720B 01-SI-MOV-1864A 01-SI-MOV-1864B Charging Charging Residual Heat Removal Residual Heat Removal Safety Injection Safety Injection Main Charging Header Isolation Main Charging Header Isolation Residual Heat Removal Outlet Isolation to Accumulator Discharge Line Residual Heat Removal Outlet Isolation to Accumulator Discharge Line Low Head Safety Injection Pump Cold Leg Discharge Stop Valve Low Head Safety Injection Pump Cold Leg Discharge Stop Valve 3 3 10X8Xl0 10X8X10 10 10 :::*.*'*.*.*'*

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Z'i!:[{[.i'I, No No No No Yes Yes Low Not Susceptible Low Not Susceptible Medium Not Susceptible Medium Not Susceptible Low Not Susceptible Low Not Susceptible Yes Yes, >0.10 No Yes Yes, >0.10 No Yes Yes, >0.10 No Yes Yes, >0.10 No Yes No No Yes Yes, >0.10 No Serial No. 17-343A Docket Nos. 50-280/281 ADDDGV Information and Status Attachment 3 Page 1 of 5 .. ******** )******t\*******\I'..*************.

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Yes Not repaired Yes Not repaired Yes Not repaired Yes Not repaired Yes Not repaired Yes Not repaired SPS SPS SPS 1 SPS 1 SPS SPS 01-SI-MOV-1867C 01-SI-MOV-1867D 01-SI-MOV-1869A 01-SI-MOV-1890A 01-SI-MOV-1890B 01-SI-MOV-1890C Safety Injection Safety Injection Safety Injection Safety Injection Safety Injection Safety Injection High Head Safety Injection to Reactor

  • Coolant System (RCS) Cold Legs High Head Safety Injection to RCS Cold Legs High Head Safety Injection from Charging Header to RCS Hot Legs Low Head Safety Injection Pump Hot Leg Discharge Stop Valve Low Head Safety Injection Pump Hot Leg Discharge Stop Valve Low Head Safety Injection Pump Hot Leg Discharge Stop Valve 3 Both 3 Both 3 Both 10X8X10 Both 10X8X10 Both 10X8X10 Both Yes High Not Susceptible Yes Yes High Not Susceptible Yes Yes Low Not Susceptible Yes Yes Low Not Susceptible Yes Yes Low Not Susceptible Yes Yes Low Not Susceptible Yes No No Yes, >0.10 No Yes, >0.10 No Yes, >0.10 No Yes, >0.10 No Yes, >0.10 No Serial No. 17-343A Docket Nos. 50-280/281 ADDDGV Information and Status Attachment 3 Page 2 of 5 Yes Not repaired Yes Not repaired Yes Not repaired Yes Not repaired Yes Not repaired Yes Not repaired SPS 2 SPS 2 SPS 2 SPS 2 SPS 2 SPS 2 02-CH-MOV-2115B 02-CH-MOV-2115D 02-CH-MOV-2289A 02-CH-MOV-2289B 02-RH-MOV-2720A 02-RH-MOV-2720B Charging Charging Charging Charging Residual Heat Removal Residual Heat Removal Charging Pump Supply from RWST Charging Pump Supply from RWST Main Charging Header Isolation Main Charging Header Isolation Residual Heat Removal Outlet Isolation to Accumulator Discharge Line Residual Heat Removal Outlet Isolation to Accumulator Discharge Line 8 8 3 3 10X8X10 10X8Xl0 Both Yes High Both Yes High Close No Low Close No Low Open No Medium Open No Medium **t?****is~~c:e~ti~!ij(~r
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Not Susceptible Not Susceptible Not Susceptible Not Susceptible Not Susceptible Not Susceptible Yes Yes Yes Yes Yes Yes Yes, >0.10 No Yes, >0.10 No Yes, >0.10 No Yes, >0.10 No Yes, >0.10 No Yes, >0.10 No Serial No. 17-343A Docket Nos. 50-280/281 ADDDGV Information and Status Attachment 3 Page 3 of 5 Yes Not repaired Yes Not repaired Yes Not repaired Yes Not repaired Yes Not repaired Yes Not repaired SPS 2 SPS 2 SPS 2 SPS 2 SPS 2 SPS 2 02-SI-MOV-2842 02-SI-MOV-2864A 02-SI-MOV-2864B 02-SI-MOV-2867C 02-SI-MOV-2867D 02-SI-MOV-2890A Safety Injection Safety Injection Safety Injection Safety Injection Safety Injection Safety Injection High Head Safety Injection from Charging Header to RCS Cold Legs Low Head Safety Injection Pump Cold Leg Discharge Stop Valve Low Head Safety Injection Pump Cold Leg Discharge Stop Valve High Head Safety Injection to RCS Cold Legs High Head Safety Injection to RCS Cold Legs Low Head Safety Injection Pump Hot Leg Discharge Stop Valve 4 10 10 3 3 10X8X10 :=**:*:: ** .. **:* *. **;~*MJltipl~ii>esign Basis Post-Accident

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Both Yes Both Yes Both Yes Both Yes Both Yes Both Yes : **:: **::-: .. ::* ... ::;, ~:$~~~;iti' m:,t su,sceptj~le)

High Not Susceptible Low Not Susceptible Low Not Susceptible High Not Susceptible High Not Susceptible(!)

Low Not Susceptible

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.* Yes Yes, >0.10 Yes Yes, >0.10 Yes Yes, >0.10" Yes Yes, >0.10 Yes Yes, >0.10 Yes No No No No No No No Serial No. 17-343A Docket Nos. 50-280/281 ADDDGV Information and Status Attachment 3 Page 4 of 5 *:.: ... //1:::::::.:.::::.:i.*:;

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Yes Not repaired Yes Not repaired Yes Not repaired Yes Not repaired Yes Not repaired Yes Not repaired SPS 2 SPS 2 02-SI-MOV-2890B 02-SI-MOV-2890C Safety Injection Safety Injection Low Head Safety Injection Pump Hot Leg Discharge Stop Valve Low Head Safety Injection Pump Cold Leg Discharge Stop Valve reJ:lti;;ttiesiJn

  • . Basis f>ost:Accident 10X8X10 Both Yes Low 10X8X10 Both Yes Low (A) Applied Wedge Pin Torque must bound anticipated design basis operating torque requirements and current maximum total torque. Not Susceptible Yes Not Susceptible(!)

Yes (1) This valve was considered susceptible in the August 31, 2017 response letter. Re-evaluation to the BWROG guidance indicates this valve is not susceptible, but the commitment to repair is not being changed. Yes, >0.10 Yes, >0.10 :-: *:: . ::* :-*<>.:-,-: . : .,:-:-: .. (No); *.* **** J!e~~ s1q*~~g,)~

        • .*** * ** (Yes; s~ deg;))> No No Serial No. 17-343A Docket Nos. 50-280/281 ADDDGV Information and Status Attachment 3 Page 5 of 5 *:::::?:::::
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Yes Not repaired Yes Not repaired

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