CNRO-2018-00018, Anchor Darling Double Disc Gate Valve Information and Status

Anchor Darling Double Disc Gate Valve Information and Status

ML18106B167
Person / Time
Site:	Pilgrim
Issue date:	04/16/2018
From:	Halter M Entergy Nuclear Operations, Entergy Operations
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
CNRO-2018-00018
Download: ML18106B167 (4)

Text

Entergy Operations, Inc. Entergy Nuclear Operations, Inc. 1340 Echelon Parkway Jackson, MS 39213 Mandy Halter Director, Nuclear Licensing CNRO-2018-00018 April 16, 2018 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001

Subject:

Anchor Darling Double Disc Gate Valve Information and Status

Pilgrim Nuclear Power Station Docket No. 50-293 Renewed License No. DPR-35

Reference:

Entergy letter to NRC, "Anchor Darling Double Disc Gate Valve Information and Status," dated December 20, 2017 (Letter Number CNRO-2017-00025)

Dear Sir or Madam:

On December 20, 2017, Entergy Operations, Inc. and Entergy Nuclear Operations, Inc. (Entergy) provided information on Anchor Darling Double Disc Gate Valves (ADDDGV) for the Entergy plants. Attachment 1 to the letter provided information on each of the ADDDGVs installed in Entergy plants. Attachment 2 to the letter provided the footnotes associated with each valve and the specific commitments for repair, as applicable.

The purpose of this letter is to modify the commitment for a valve installed at the Pilgrim Nuclear Power Station (PNPS). Consistent with the Boiling Water Reactor Owners' Group report, based on recent testing and analysis, the MO-1001-29B wedge pin is not susceptible to failure and this valve can be reclassified as a Priority 5 valve. As a result, since MO-1001-29B no longer requires repair, the commitment documented in the referenced letter has been changed as shown in Attachment 1.

Should you have any questions or require additio nal information, please contact Mr. John Giddens, Senior Manager, Regulatory Assurance, at (601) 368-5756.

Respectfully,

Mandy Halter Director, Nuclear Licensing

MH/mp CNRO-2018-00018 Page 2 of 2

Attachment:

1) Licensing Commitment and Note for Pilgrim Nuclear Power Station

cc: C. Bakken (ECH) C. Costanzo (ECH)

D. Jacobs (ECH)

B. Sullivan (PIL)

K. Jury (ECH)

B. Ford (ECH)

J. Giddens (ECH)

NRC Region I Administrator NRC Project Manager (PIL) NRC Senior Resident Inspector (PIL) Ms. Margaret O'Banion, Project Manager, NRC/NRR/DORL

ATTACHMENT 1 CNRO-2018-00018 Licensing Commitment and Note for Pilgrim Nuclear Power Station

Licensing Commitment and Note for Pilgrim Nuclear Power Station Attachment 1 to CNRO-2018-00018 Page 1 of 1 Plant Name Unit # Valve ID Result of susceptibility evaluation (susceptible or not susceptible)

Is the susceptibility evaluation in general conformance with TP16-1-112 R4? (Yes/No)

Notes (1), (2) or (3)

Was an initial stem- rotation check performed (Yes/No) If yes, include rotation criteria (i.e. 10 degrees or 5 degrees)

A repair schedule for each susceptible valve Regulatory Commitment to Repair Yes/No Commitment Date or Outage PNP 1 MO-1001-29B Not Susceptible Yes- Note (1) Yes 5 degrees N/A No N/A NOTE 1 Applied Wedge Pin Torque based on maximum value from diagnostic test data