CP-201700976, Active Safety Function Anchor Darling Double Disc Gate Valves

Active Safety Function Anchor Darling Double Disc Gate Valves

ML18009A445
Person / Time
Site:	Comanche Peak
Issue date:	12/18/2017
From:	Sewell S Luminant Generation Co, TXU Energy, Vistra Energy
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
CP-201700976, TXX-17098
Download: ML18009A445 (2)

Text

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'f*energy I Steven Sewell Sr. Director, Engineering & Regulatory Affairs Luminant P.0. Box 1002 6322 North FM 56 Glen Rose, TX 76043 o 254. 897.6113 m 817.776.0798 CP-201700976 TXX-17098 U.S. Nuclear Regulatory Commission ATIN: Document Control Desk Washington, DC 20555-0001 12/18/2017

SUBJECT:

COMANCHE PEAK NUCLEAR POWER PLANT DOCKET NOS. 50-445 AND 50-446 ACTIVE SAFETY FUNCTION ANCHOR DARLING DOUBLE DISC GATE VALVES

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

Dear Sir or Madam:

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 will 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. Reference 2 also stated that utilities or sites without active. safety function Anchor Darling DDGVs would also provide a response.

This letter serves to confirm that Comanche Peak Nuclear Power Plant (CPNPP) does not use Anchor Darling DDGVs to support any active safety function.

This communication contains no new licensing basis commitments regarding CPNPP Units 1 and 2.

1601 BRYAN STREET DALLAS, TEXAS 75201 o 214-812-4600 VISTRAEN ERGY.COM

TXX-17098 Page 2 of 2 I

j Should you have any questions, please contact Gary Merka at (254) 897-6613.

Sincerely, c- Kriss Kennedy, Region IV Margaret Watford O'Banion, NRR Resident Inspectors, Comanche Peak