WM 14-0011, Change to an Essential Service Water System Water Hammer Mitigation Commitment

Change to an Essential Service Water System Water Hammer Mitigation Commitment

ML14321A625
Person / Time
Site:	Wolf Creek
Issue date:	05/08/2014
From:	Heflin A Wolf Creek
To:	Document Control Desk
References
EA-12-135, WM 14-0011
Download: ML14321A625 (3)

Text

Executive Chief Nuclear Officer 8, 4 14-0011 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555

References:

1) Letter WM 12-0023, dated August 2, 2012, M. Sunseri, WCNOC, to USNRC WM 13-001 dated June 3, w.

WCNOC, to USNRC

Subject:

Docket No. 50-482: Change to an Essential Service Water System Water Hammer Mitigation Commitment (NEI) 99-04, "Guidelines Managing NRC Nuclear Regulatory Commission (NRC) 1 Nuclear 35, which contained a closure water hammer in the Essential acceptable design by 2, 201 water was in to support installation by May 9, 2014. Some critical deficiencies Design Change Package (DCP) 13424, "Incorporation of ESW Water Hammer Concurrent Modification," were identified less than four weeks before scheduled implementation. Condition Report (CR) 79619, which addressed the deficiencies in 13424 a root-cause been to the Senior Resident Inspector

testing of the headers containment coolers has been performed in the Mid-Cycle 20 Outage.

In addition to improving the material condition of the ESW System, WCNOC will aggressively address mitigation of the adverse effects of column closure water hammer in the ESW System.

Accordingly, WCNOC has changed the commitment to mitigate adverse effects of column closure water hammer in the ESW System to within acceptable design parameters by May 9, 2014 to a commitment to install a modification to mitigate the adverse effects of column closure water hammer in the ESW System prior to plant start-up from Refueling Outage 20, which is currently scheduled to start on March 7, 2015. If you have any questions concerning this matter, please contact me at (620) 364-4000, or Mr. Michael J. Westman at (620) 364-4009.

Sincerely,

table a made by Wolf Creek Nuclear Operating in this document. Any other statements in this letter are provided for information purposes and are not considered regulatory commitments. Please direct questions regarding this commitment to Mr. Michael Westman, Manager Regulatory Affairs at Wolf Creek Generating Station, (620) 364-4009.

REGULATORY COMMITMENT DUE DATE Install a modification to mitigate the adverse effects of column Prior to plant start-up water hammer in the ESW System. from Refueling Outage 20, which is currently scheduled to start on March 7, 2015.