ML16218A390

Supplemental Information Needed for Acceptance of Requested Licensing Action, Request for Measurement Uncertainty Recapture (Mur) Power Uprate (from 3486 Mwt to 3544 Mwt)

ML16218A390
Person / Time
Site:	Columbia
Issue date:	08/08/2016
From:	Klos L Plant Licensing Branch IV
To:	Reddemann M Energy Northwest
Klos L
References
CAC MF8060
Download: ML16218A390 (4)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 August 8, 2016 Mr. Mark E. Reddemann Chief Executive Officer Energy Northwest P.O. Box 968 (Mail Drop 1023)

Richland, WA 99352-0968

SUBJECT:

COLUMBIA GENERATING STATION-SUPPLEMENTAL INFORMATION NEEDED FOR ACCEPTANCE OF REQUESTED LICENSING ACTION RE:

MEASUREMENT UNCERTAINTY RECAPTURE POWER UPRATE AMENDMENT (CAC NO. MF8060)

Dear Mr. Reddemann:

By letter dated June 28, 2016 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML16183A365), Energy Northwest submitted a license amendment request for Columbia Generating Station. The proposed amendment would revise the operating license and the technical specifications to implement an increase in rated thermal power from the current licensed thermal power of 3486 megawatts thermal (MWt) to 3544 MWt. The purpose of this letter is to provide the current results of the U.S. Nuclear Regulatory Commission (NRC) staff's acceptance review of this amendment request. The acceptance review was performed to determine if there is sufficient technical information in scope and depth to allow the NRC staff to complete its detailed technical review. The acceptance review is also intended to identify whether the application has any readily apparent information insufficiencies in its characterization of the regulatory requirements or the licensing basis of the plant.

Consistent with Section 50.90 of Title 10 of the Code of Federal Regulations (10 CFR), an amendment to the license (including the technical specifications) must fully describe the changes requested, and following as far as applicable, the form prescribed for original applications. Section 50.34 of 10 CFR addresses the content of technical information required.

This section stipulates that the submittal address the design and operating characteristics, unusual or novel design features, and principal safety considerations.

The NRC staff has reviewed your application and concluded that the information delineated in the enclosure to this letter is necessary to enable the staff to make an independent assessment regarding the acceptability of the proposed amendment in terms of regulatory requirements and the protection of public health and safety and the environment.

In order to make the application complete, the NRC staff requests that Energy Northwest supplement the application to address the information requested in the enclosure by August 18, 2016. This will enable the NRC staff to continue its detailed technical review. If the information responsive to the NRC staff's request is not received by the above date, the application will not be accepted for review pursuant to 10 CFR 2.101, and the NRC will cease its review activities associated with the application. If the application is subsequently accepted for review, you will be advised of any further information needed to support the staff's detailed technical review by separate correspondence.

M. Reddemann The information requested and associated time frame in this letter were discussed with Ms. Lisa Williams of your staff on August 5, 2016.

If you have any questions, please contact me at (301) 415-5136.

Sincerely, John Klos, Project Manager Plant Licensing Branch IV-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-397

Enclosure:

Supplemental Information Needed cc w/encl: Distribution via Listserv

SUPPLEMENTAL INFORMATION NEEDED FOR ACCEPTANCE OF REQUESTED LICENSING ACTION MEASUREMENT UNCERTAINTY RECAPTURE POWER UPRATE ENERGY NORTHWEST COLUMBIA GENERATING STATION DOCKET NO. 50-397

1. Emergency Diesel Generators The U.S. Nuclear Regulatory Commission (NRC) staff reviewed the Columbia Generating Station measurement uncertainty recapture power uprate license amendment request (LAR) dated June 28, 2016 (Agencywide Documents Access and Management System (ADAMS)

Accession No. ML16183A365), Section 3.4.5, "Grid Stability Studies," and LAR Enclosure 9,(1l NED0-33853, Revision 0, "Safety Analysis Report for Columbia Generating Station, Thermal Power Optimization," June 2016, Section 6.1, "AC [Alternating Current] Power, and Section 6.1.2, "On-Site Power," and found there is no documentation on emergency diesel generator loading impact due to the power uprate (i.e., the impact of the increased thermal power from 3486 MWt to 3544 MWt on emergency diesel generator loads). Additionally, there is no documentation discussing the LAR's impacts and assessment against battery chargers.

2. AC Power Off-Site and Switchyard Equipment The NRC staff reviewed LAR Enclosure 9,( 1l NED0-33853, Revision 0, Section 6.1, "AC Power,"

and Section 6.1.1, "Off-Site Power," and found a lack of information regarding the power uprate's impact on electrical equipment ratings in switchyard. Specifically, the LAR does not discuss what switchyard equipment was reviewed for impacts, how an assessment was made against this equipment (by what analyses or standard), nor does the LAR state a cumulative summary of the impact made, if any, of the power uprate against the switchyard and its equipment.

3. DC Power The NRC staff reviewed LAR Enclosure 9,(1), NED0-33853, Revision 0, Section 6.2, "DC

[Direct Current] Power," and found a lack of information regarding the power uprate's impact on Class 1E 125 Volt DC electrical loading. The LAR does not also state if a review of the leading edge flow meter's electrical distribution loading was complete and did not provide a summary of those results.

1 Enclosure 7 is the proprietary version designated as NEDC-33853, Revision 0, "Safety Analysis Report for Columbia Generating Station, Thermal Power Optimization," June 2016.

Enclosure

ML16218A390 OFFICE NRR/DORL/LPL4-1/PM NRR/DORL/LPL4-1 /LA NRR/DE/EEEB/BC NRR/DORL/LPL4-1 /BC NRR/DORL/LPL4-1 /PM NAME JKlos (BSingal for) JBurkhardt JZimmerman RPascarelli (BSingal for) JKlos (CFLyon for)

DATE 08/08/16 08/05/16 08/08/16 08/08/16 08/08/16