ML082810214

From kanterella
Revision as of 09:35, 20 September 2018 by StriderTol (talk | contribs) (Created page by program invented by StriderTol)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to navigation Jump to search
Response to Public Comments for Draft Regulatory Guide DG-1198
ML082810214
Person / Time
Issue date: 03/13/2009
From:
Office of Nuclear Regulatory Research
To:
Orr M P/RES/301-415-6373
Shared Package
ML082810194 List:
References
DG-1198, RG-1.125 Rev 2
Download: ML082810214 (2)


Text

March 13, 2009 Response to Public Comments for Draft Regulatory Guide DG-1198, "Physical Models for Design and Operation of Hydraulic Structures and Systems for Nuclear Power Plants" Proposed Revision 2 of Regulatory Guide (RG) 1.125 A notice that Draft Regulatory Guide DG-1198 (proposed Revision 2 to Regulatory Guide 1.125) was available for public comment was published in the Federal Register (73 FR 39731) on Thursday, July 10, 2008. The public comment period closed September 5, 2008. One set of comments was received from the organization identified below. The following table contains the comments and staff disposition.

Comments were received from: James H. Riley, Director of Engineering, Nuclear Generation Division Nuclear Energy Institute (NEI) 1776 I Street, NW, Suite 400 Washington, DC 20006 Phone: 202-739-8137 (ADAMS Accession No. ML082540323)

Comment NRC Response The draft regulatory guide DG-1198 provides an update to Regulatory Guide 1.125 (1978) and describes the detail and documentation of data and studies that an applicant should include in the PSAR or the FSAR to support the use of physical hydraulic model testing for predicting the performance of hydraulic structures and systems for nuclear power plants. The regulatory position of this guide is applicable only to physical models used to predict the action or interaction of surface waters with features located outside of containment. The recommendations of this guide do not apply to internal plant systems or structures. No response required. RG 1.125 only applied to modeling safety-related features located outside containment. Is the intent of the DG to bound both safety and non-safety related structures? No. The guide has been revised to make it safety-related specific. The inclusion of pump designs does not appear to be consistent with the definition of hydraulic structures included in Section A of the DG. We recommend that pump designs be removed from DG-1198 or further explanation be provided on how to ensure pump designs comply with the DG. Wording of guide has been revised. Is it the intent of DG-1198 to remove investigation reports, such as the U.S. Army Experimental Waterways Station, as an acceptable means of demonstrating compliance? RG 1.125 found this kind of report to be acceptable. No. The reference to single report from the U. S. Army Waterways Experiment Station in Vicksburg, MS. was removed to clarify that multiple types of reports consistent with the regulatory position is acceptable.

March 13, 2009 Comment NRC Response Is it the intent of DG-1198 to encompass plants that now have FSAR vs. a PSAR? RG 1.125 applied only to PSARs. It is the intent of RG 1.125 to apply to all plants, those licensed in accordance with 10 CFR Part 50 as well as those licensed in accordance with 10 CFR Part 52. Plants licensed in accordance with 10 CFR Part 52 will not have a PSAR.