NLS2015075, Deviation from BWRVIP-18 and BWRVIP-41 Inspection Requirements Cooper Nuclear Station

Deviation from BWRVIP-18 and BWRVIP-41 Inspection Requirements Cooper Nuclear Station

ML15175A138
Person / Time
Site:	Cooper
Issue date:	06/17/2015
From:	Shaw J Nebraska Public Power District (NPPD)
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
BWRVIP-18, BWRVIP-41, NLS2015075
Download: ML15175A138 (2)

Text

H Nebraska Public Power District Always there when you need us NLS2015075 June 17, 2015 U.S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, D.C. 20555-0001

Subject:

Deviation from BWRVIP-18 and BWRVIP-41 Inspection Requirements Cooper Nuclear Station, Docket No. 50-298, DPR-46

References:

1. Boiling Water Reactor Vessel and Internals Project (BW'RVIP), BWR Core Spray Internals Inspection and Flaw Evaluation Guidelines (BWRVIP-1 8, Revision 1-A), Electric Power Research Institute (EPRI) Report TR-1025060, dated April 2012

2. BWRVIP, BWR Jet Pump Assembly Inspection and Flaw Evaluation Guidelines (BWRVIP-41, Revision 3), EPRI Report TR-(1 021000, dated September 2010

Dear Sir or Madam:

The purpose of this letter is for Nebraska Public Power District (NPPD) to inform the Nuclear Regulatory Commission (NRC) that NPPD missed completing some scheduled reactor vessel core spray piping weld and jet pump assembly weld inspections at Cooper Nuclear Station (CNS) in accordance with BWRVIP-18 and BWRVIP-41, respectively (References 1 and 2).

This letter is being submitted per the requirements of BWRVIP-94NP, Revision 2, "Program Implementation Guide."

BWRVIP-18 requires that enhanced visual inspections (EVT-1) be performed to augment ultrasonic testing (UT) volumetric examinations when the volumetric coverage cannot achieve 100% coverage. CNS did not perform the EVT-l examinations in addition to the UT inspections for certain core spray welds.

BWRVIP-41 requires certain jet pump welds to be examined on a six year frequency. Due to a scheduling error, CNS missed an opportunity in the recent refueling outage 28 to examine these welds and therefore will extend the examination frequency one more cycle until they can be examined in the fall of 2016 during refueling outage 29 (RE29).

Accordingly, a technical justification for deviation from the BWRVIP guidance was developed.

The technical justification provides reasonable assurance that the welds will continue to perform their intended design safety function until the welds can be re-inspected in RE29, thus returning CNS to compliance with the BWRVIP requirements.

COOPER NUCLEAR STATION P.O. Box 98 / Brownville, NE 68321-0098 Telephone: (402) 825-3811 / Fax: (402) 825-5211 www.nppd.com

NLS2015075 Page 2 of 2 This letter is being transmitted for information only and CNS is not requesting any action from the NRC staff. No formal licensee commitments are being made in this submittal.

Should you have any questions concerning this matter, please contact me at (402) 825-2788.

Sincerely, Licensing Manager cc: Regional Administrator USNRC - Region IV Cooper Project Manager USNRC - NRR Project Directorate IV- 1 Matthew Mitchell Branch Chief USNRC - NRR, Division of Component Integrity Vessels and Internals Integrity Program Senior Resident Inspector USNRC - CNS Andrew McGehee EPRI BWRVIP Program Manager NPG Distribution CNS Records