ML18278A247

LLC - Response to NRC Request for Additional Information No. 410 (Erai No. 9310) on the NuScale Design Certification Application

ML18278A247
Person / Time
Site:	NuScale
Issue date:	10/05/2018
From:	Rad Z NuScale
To:	Document Control Desk, Office of New Reactors
Shared Package
ML18278A246	List: ML18278A247
References
RAIO-1018-62054
Download: ML18278A247 (9)

Text

RAIO-1018-62054 October 05, 2018 Docket No.52-048 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk One White Flint North 11555 Rockville Pike Rockville, MD 20852-2738

SUBJECT:

NuScale Power, LLC Response to NRC Request for Additional Information No.

410 (eRAI No. 9310) on the NuScale Design Certification Application

REFERENCES:

1. U.S. Nuclear Regulatory Commission, "Request for Additional Information No. 410 (eRAI No. 9310)," dated April 09, 2018

2. NuScale Power, LLC Supplemental Response to NRC "Request for Additional Information No. 410 (eRAI No. 9310)," dated June 08, 2018 The purpose of this letter is to provide the NuScale Power, LLC (NuScale) response to the referenced NRC Request for Additional Information (RAI).

The Enclosures to this letter contain NuScale's response to the following RAI Question from NRC eRAI No. 9310:

• 03.09.02-70 The majority of responses to RAI No. 410, eRAI No. 9310, were previously provided in Reference 2. This completes all responses to eRAI 9310. is the proprietary version of the NuScale Response to NRC RAI No. 410 (eRAI No.

9310). NuScale requests that the proprietary version be withheld from public disclosure in accordance with the requirements of 10 CFR § 2.390. The enclosed affidavit (Enclosure 3) supports this request. Enclosure 2 is the nonproprietary version of the NuScale response.

This letter and the enclosed responses make no new regulatory commitments and no revisions to any existing regulatory commitments.

If you have any questions on this response, please contact Marty Bryan at 541-452-7172 or at mbryan@nuscalepower.com.

Sincerely,

~-:;? ~

~~

y Rad Director, Regulatory Affairs NuScale Power, LLC NuScale Power, LLC 1100 NE Circle Blvd. , Suite 200 Corvalis, Oregon 97330 , Office: 541.360.0500 , Fax: 541.207.3928 www.nuscalepower.com

RAIO-1018-62054 Distribution: Gregory Cranston, NRC, OWFN-8G9A Samuel Lee, NRC, OWFN-8G9A Marieliz Vera, NRC, OWFN-8G9A : NuScale Response to NRC Request for Additional Information eRAI No. 9310, proprietary : NuScale Response to NRC Request for Additional Information eRAI No. 9310, nonproprietary : Affidavit of Zackary W. Rad, AF-1018-62055 NuScale Power, LLC 1100 NE Circle Blvd., Suite 200 Corvalis, Oregon 97330, Office: 541.360.0500, Fax: 541.207.3928 www.nuscalepower.com

RAIO-1018-62054 :

NuScale Response to NRC Request for Additional Information eRAI No. 9310, proprietary NuScale Power, LLC 1100 NE Circle Blvd., Suite 200 Corvalis, Oregon 97330, Office: 541.360.0500, Fax: 541.207.3928 www.nuscalepower.com

RAIO-1018-62054 :

NuScale Response to NRC Request for Additional Information eRAI No. 9310, nonproprietary NuScale Power, LLC 1100 NE Circle Blvd., Suite 200 Corvalis, Oregon 97330, Office: 541.360.0500, Fax: 541.207.3928 www.nuscalepower.com

Response to Request for Additional Information Docket No.52-048 eRAI No.: 9310 Date of RAI Issue: 04/09/2018 NRC Question No.: 03.09.02-70 In the response to Subquestion 2 of RAI 8911, Question 03.09.02-24, the applicant stated that the core barrel and reflector are modeled within the lower reactor vessel internal (RVI) submodel. The core barrel and reflector are modeled in ANSYS as shell elements and solid elements, respectively. However, the fluid gap between the core barrel and reflector is not considered in the modelling. The NRC staff noted that the narrow fluid gap ((2(a),(c) between the core barrel and reflector can affect the natural frequency of the core barrel and reflector significantly. Without considering the fluid gap, the core barrel and reflector have fundamental frequency of (( }}2(a),(c) Hz and (( }}2(a),(c) Hz, respectively (data from EC-A023-3535, Rev. 0, RVI Turbulent Buffeting Degradation Evaluation). With the fluid gap considered in the modelling, frequency of the first five modes of the core barrel-fluid gap-reflector coupled system are (( }}2(a),(c) Hz (data from ER-A010-2157, Rev.0, Methodology Development for Hydrodynamic Effect Evaluation for Reflector and Core Barrel). Justify that omission of the fluid gap between the core barrel and reflector in the lower RVI submodel provides conservative results of the NPM seismic response. Include the requested information in the NPM Seismic Report. NuScale Response: In order to address the differences between the modeling approach with and without a fluid gap, the Lower RVI submodel was updated to capture the effect of the fluid gap using the Fourier nodes methodology, and the analysis re-performed. Resultant forces on the component section interfaces taken at the top and bottom of the core barrel were found to be less conservative when using the no-separation contact between these components (i.e., the fluid gap not considered). NuScale Nonproprietary

Instead of using no-separation contact, the fluid gap is modeled using the Fourier node method, as described in the NPM Seismic Analysis technical report TR-0916-51502 Revision 1, Section 4.1.8.5. This updated Lower RVI submodel will be included in the TR-0916-51502 Revision 2. Impact on DCA: The updated Lower RVI submodel as described in the response will be included in the NPM Seismic Analysis technical report, TR-0916-51502 Revision 2. NuScale Nonproprietary

RAIO-1018-62054 : Affidavit of Zackary W. Rad, AF-1018-62055 NuScale Power, LLC 1100 NE Circle Blvd., Suite 200 Corvalis, Oregon 97330, Office: 541.360.0500, Fax: 541.207.3928 www.nuscalepower.com

NuScale Power, LLC AFFIDAVIT of Zackary W. Rad I, Zackary W. Rad, state as follows:

1. I am the Director, Regulatory Affairs of NuScale Power, LLC (NuScale), and as such, I have been specifically delegated the function of reviewing the information described in this Affidavit that NuScale seeks to have withheld from public disclosure, and am authorized to apply for its withholding on behalf of NuScale.

2. I am knowledgeable of the criteria and procedures used by NuScale in designating information as a trade secret, privileged, or as confidential commercial or financial information. This request to withhold information from public disclosure is driven by one or more of the following:

a. The information requested to be withheld reveals distinguishing aspects of a process (or component, structure, tool, method, etc.) whose use by NuScale competitors, without a license from NuScale, would constitute a competitive economic disadvantage to NuScale.

b. The information requested to be withheld consists of supporting data, including test data, relative to a process (or component, structure, tool, method, etc.), and the application of the data secures a competitive economic advantage, as described more fully in paragraph 3 of this Affidavit.

c. Use by a competitor of the information requested to be withheld would reduce the competitor's expenditure of resources, or improve its competitive position, in the design, manufacture, shipment, installation, assurance of quality, or licensing of a similar product.

d. The information requested to be withheld reveals cost or price information, production capabilities, budget levels, or commercial strategies of NuScale.

e. The information requested to be withheld consists of patentable ideas.

3. Public disclosure of the information sought to be withheld is likely to cause substantial harm to NuScale's competitive position and foreclose or reduce the availability of profit-making opportunities. The accompanying Request for Additional Information response reveals distinguishing aspects about the method by which NuScale develops its power module seismic analysis.

NuScale has performed significant research and evaluation to develop a basis for this method and has invested significant resources, including the expenditure of a considerable sum of money. The precise financial value of the information is difficult to quantify, but it is a key element of the design basis for a NuScale plant and, therefore, has substantial value to NuScale. If the information were disclosed to the public, NuScale's competitors would have access to the information without purchasing the right to use it or having been required to undertake a similar expenditure of resources. Such disclosure would constitute a misappropriation of NuScale's intellectual property, and would deprive NuScale of the opportunity to exercise its competitive advantage to seek an adequate return on its investment. AF-1018-62055

4. The information sought to be withheld is in the enclosed response to NRC Request for Additional Information No. 410, eRAI No. 9310. The enclosure contains the designation "Proprietary" at the top of each page containing proprietary information. The information considered by NuScale to be proprietary is identified within double braces, "(( }}" in the document.

5. The basis for proposing that the information be withheld is that NuScale treats the information as a trade secret, privileged, or as confidential commercial or financial information. NuScale relies upon the exemption from disclosure set forth in the Freedom of Information Act ("FOIA"), 5 USC§ 552(b)(4), as well as exemptions applicable to the NRC under 10 CFR §§ 2.390(a)(4) and 9.17(a)(4).

6. Pursuant to the provisions set forth in 10 CFR § 2.390(b )(4 ), the following is provided for consideration by the Commission in determining whether the information sought to be withheld from public disclosure should be withheld:

a. The information sought to be withheld is owned and has been held in confidence by NuScale.

b. The information is of a sort customarily held in confidence by NuScale and, to the best of my knowledge and belief, consistently has been held in confidence by NuScale.

The procedure for approval of external release of such information typically requires review by the staff manager, project manager, chief technology officer or other equivalent authority, or the manager of the cognizant marketing function (or his delegate), for technical content, competitive effect, and determination of the accuracy of the proprietary designation. Disclosures outside NuScale are limited to regulatory bodies, customers and potential customers and their agents, suppliers, licensees, and others with a legitimate need for the information, and then only in accordance with appropriate regulatory provisions or contractual agreements to maintain confidentiality.

c. The information is being transmitted to and received by the NRC in confidence.

d. No public disclosure of the information has been made, and it is not available in public sources. All disclosures to third parties, including any required transmittals to NRC, have been made, or must be made, pursuant to regulatory provisions or contractual agreements that provide for maintenance of the information in confidence.

e. Public disclosure of the information is likely to cause substantial harm to the competitive position of NuScale, taking into account the value of the information to NuScale, the amount of effort and money expended by NuScale in developing the information, and the difficulty others would have in acquiring or duplicating the information. The information sought to be withheld is part of NuScale's technology that provides NuScale with a competitive advantage over other firms in the industry.

NuScale has invested significant human and financial capital in developing this technology and NuScale believes it would be difficult for others to duplicate the technology without access to the information sought to be withheld. I declare under penalty of perjury that the foregoing is true and correct. Executed on October 5, 2018. ~ ------ 7 Zackary W. Rad AF-1018-62055}}