ML18002A553

Korea Hydro & Nuclear Power Co., Ltd - Response to RAI Er 1-8428 for Question EIS ACC/SA-12

ML18002A553
Person / Time
Site:	05200046
Issue date:	01/02/2018
From:	Korea Hydro & Nuclear Power Co, Ltd
To:	Office of New Reactors
Shared Package
ML18002A551	List: ML18002A552 ML18002A553
References
MKD/NW-18-0002L
Download: ML18002A553 (2)

Text

ACC/SA 1 / 2 KEPCO/KHNP RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION APR1400 Design Certification Korea Electric Power Corporation / Korea Hydro & Nuclear Power Co., LTD Docket No.52-046 RAI No.: ER 1-8428 SRP Section: Environmental Report Application Section: APR1400 Environmental Report Date of RAI Issued: 03/22/2016 Question No. EIS ACC/SA-12 10 CFR 51.55(a) requires each applicant for a standard design certification under subpart B of 10 CFR Part 52 (i.e., 10 CFR 52.47(b)(2)) to submit with its application a separate document entitled, "Applicant's Environmental ReportStandard Design Certification." The environmental report must address the costs and benefits of severe accident mitigation design alternatives, and the bases for not incorporating severe accident mitigation design alternatives in the design to be certified.

The environmental standard review plan (ESRP) Section 7.2, Severe Accidents, of NUREG 1555 directs the staff to evaluate and independently confirm severe accident risks and analyses presented in an Environmental Report (ER) (i.e., the APR1400 ER, Applicants Environmental Report - Standard Design Certification, found under ML15006A038 and the proprietary technical report, Severe Accident Mitigation Design Alternatives (SAMDAs) for the APR1400, under ML15012A105) of accidents involving radioactive material that can be postulated for the plant under review. The scope of this review should include probability-weighted consequence (i.e., risks) analysis for severe accidents, including dose and socioeconomic risk impacts based on plant specific data in sufficient detail to appropriately evaluate the risks for severe accidents.

The staff requires the following additional information in order to complete its review of the environmental impacts of severe accidents and to ensure appropriate documentation of the applicants assessment in the APR1400 Environmental Report.

Provide in the ER and APR1400-E-NR-14006-P the source of information and specific references regarding the data and results from the Level 1 PRA documents, Level 2 PRA documents, and supporting Level 3 PRA documents that are mentioned throughout the respective document.

The degree of detail provided by the applicant in their Environmental Report should satisfy Regulatory Guide 4.2, Revision 2, Preparation of Environmental Reports for Nuclear Power

ACC/SA 2 / 2 KEPCO/KHNP Stations, Section A.7.c, Presentation of Information, and support the staff guidance in NUREG-1555, Environmental Standard Review Plan, Section 7.2 under Data and Information Need and Review Procedures for the staffs environmental finding (see Regulatory Guide 4.2 (ML003739519) page x and NUREG-1555 Section 7.2 (ML071690007) pages 7.2-2 through 7.2-5). For example, for material that can be found in a particular section or chapter of a reference, the location of the information should be provided in the ER.

The NRC staff request that any revisions to the ER or supporting technical reports be provided as a markup as part of the response to this RAI.

This RAI is related to the Environmental Audit Information Needs ER-COM-2 (ML15198A023).

Response

The Environmental Report (ER) (APR1400-K-X-ER-14001-NP, Rev. 1) and SAMDA report (APR1400-E-P-NR-14006-P, Rev. 1) have been revised to provide specific reference to the source of information used. For example, Section 5 of the ER provides specific references to all basic event information considered in the SAMDA, and Section 8 of the ER provides references to cost estimates used in the SAMDA.

Note that due to the extensive nature of the revisions, specific markups are not provided.

Impact on DCD There is no impact on the DCD.

Impact on PRA There is no impact on the PRA.

Impact on Technical Specifications There is no impact on the Technical Specifications.

Impact on Technical/Topical/Environmental Reports The Environmental Report and SAMDA Report are updated to reflect the changes discussed above.