ML20112F457

NRR E-mail Capture - Official Release of NRC RAIs for Columbia Covid Exigent Due Friday April 24, 2020

ML20112F457
Person / Time
Site:	Columbia
Issue date:	04/21/2020
From:	John Klos NRC/NRR/DORL/LPL4
To:	Ronnie Garcia Energy Northwest, Office of Nuclear Reactor Regulation
References
Download: ML20112F457 (3)

Text

From: Klos, John Sent: Tuesday, April 21, 2020 1:34 PM To: Garcia, Richard M.

Cc: Klos, John

Subject:

Official release of NRC RAIs for Columbia COVID exigent due Friday April 24, 2020

Rick, By letter dated April 15, 2020 (Agencywide Documents Access management System (ADAMS)

Accession No ML20107G972), Energy Northwest (the licensee) requested an exigent amendment to Operating License NPF-21 of Columbia Generating Station (Columbia). The proposed amendment would revise the Technical Specification (TS) 3.8.4 DC (Direct Current)

Sources - Operating and TS 3.8.7 Distribution Systems - Operating. This request adds a one-time extension for TS Required Actions 3.8.4.G.1, 3.8.7.A.1, and 3.8.7.B.1 completion time, specifically associated with Division 2 4160 V AC (Alternating Current) and 125 V DC electrical power distribution inoperability.

The following request for additional information is needed to complete the NRCs review of the Columbia exigent license amendment request (LAR).

Regulatory Requirements:

General Design Criterion (GDC) 17, Electric power systems, of Appendix A, General Design Criteria for Nuclear Power Plants, to Title 10 of the Code of Federal Regulations (10 CFR) Part 50, states in part that an onsite electric power system and an offsite electric power system shall be provided to permit functioning of structures, systems, and components important to safety.

The safety function for each system (assuming the other system is not functioning) shall be to provide sufficient capacity and capability to assure that (1) specified acceptable fuel design limits and design conditions of the reactor coolant pressure boundary are not exceeded as a result of anticipated operational occurrences and (2) the core is cooled and containment integrity and other vital functions are maintained in the event of postulated accidents.

GDC 18, Inspection and Testing of Electric Power Systems, requires that electric power systems that are important to safety must be designed to permit appropriate periodic inspection and testing.

RAI In the third paragraph of Section 2.4.1 of the LAR, the licensee stated that a bucket could be changed in approximately 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> including the following approximate tasks and durations, 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> to verify job conditions and establish clearance order control, 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> for the actual electrical work, 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> of job closeout and removal of clearances and 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> of post modification testing. However, in the first paragraph of Section 2.4.1, the licensee stated that it will take approximately 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> to replace the bucket and the starter coil. Please explain the discrepancy.

The RAI is release officially and a response is required by Friday April 24, 2020.

Thank you,

John Klos DORL Callaway, Columbia Project Manager U.S. NRC, Office of Nuclear Reactor Regulation, Division of Operating Reactor Licensing, O9D22 NRC/NRR/DORL/LPL4, MS O9E3 Washington, DC 20555-0001 301.415.5136, John.Klos@NRC.gov

Hearing Identifier: NRR_DRMA Email Number: 541 Mail Envelope Properties (BL0PR0901MB32171228490C6AB463B0A1F2E3D50)

Subject:

Official release of NRC RAIs for Columbia COVID exigent due Friday April 24, 2020 Sent Date: 4/21/2020 1:33:39 PM Received Date: 4/21/2020 1:33:40 PM From: Klos, John Created By: John.Klos@nrc.gov Recipients:

"Klos, John" <John.Klos@nrc.gov>

Tracking Status: None "Garcia, Richard M." <rmgarcia@energy-northwest.com>

Tracking Status: None Post Office: BL0PR0901MB3217.namprd09.prod.outlook.com Files Size Date & Time MESSAGE 2856 4/21/2020 1:33:40 PM Options Priority: Normal Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date: