ML18018B380
| ML18018B380 | |
| Person / Time | |
|---|---|
| Site: | 05200046 |
| Issue date: | 01/18/2018 |
| From: | Korea Hydro & Nuclear Power Co, Ltd |
| To: | Office of New Reactors |
| Shared Package | |
| ML18018B378 | List: |
| References | |
| MKD/NW-18-0015L | |
| Download: ML18018B380 (7) | |
Text
EIS ACC/SA-6_Rev.1 - 1 / 2 KEPCO/KHNP REVISED 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-6 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 a discussion in ER Section 3, Base Risk, about what atmospheric, surface water, and groundwater pathways were applied in the severe accident analysis and what the resulting impacts were from these pathways.
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.
EIS ACC/SA-6_Rev.1 - 2 / 2 KEPCO/KHNP This RAI is related to the Environmental Audit Information Needs ER-IT-5 (ML15198A023).
Response - (Rev. 1)
The Environmental Reports (ER) Section 3 will be revised to discuss what atmospheric, surface water, and groundwater pathways were applied in the severe accident analysis and what the resulting impacts were from these pathways (see Attachment 1). Markups to add Reference 7 in Section 12 was provided in the AAC/SA-5 response ER markups.
Note: Section 3 of APR1400-E-P-NR-014006-P, Rev. 0, will be revised to include the same information added in Attachment 1.
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 Reports (ER) will be revised as shown in Attachment.
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APR1400 Applicants Environmental Report - Standard Design Certification power events and low-power shutdown events are presented in Tables 1a and 1b, respectively.
Representative releases were determined for each STC. The SAMDA Technical Report (Reference 4) analyzes representative sequences from each STC and develops timing and release characteristic information for representative fission product groups. This information was used to approximate the radiological release plumes used in the Level 3 PRA.
Offsite consequences were calculated from the Level 3 PRA. For each STC, the Level 3 PRA provided values for the conditional offsite dose and conditional offsite property damage that would result if a fission product release with the plume characteristics used to represent the STC occurred. The total expected dose consequence was obtained by multiplying the conditional offsite dose by the expected frequency for each STC and then summing the expected doses for all STCs.
The conditional dose and expected dose for each STC along with the total expected dose are shown in Tables 2a through 2f. Similarly, the total expected property damage was obtained by multiplying the conditional property damage value by the expected frequency for each STC and then summing the expected property damage values for all STCs. The conditional property costs and expected property costs for each STC along with the total expected property costs are shown in Tables 3a through 3f.
Insert text the following text after Insert A from RAI AAS/SA-5.
The principal phenomena considered in WinMACCS are atmospheric transport, mitigative actions based on dose projections, dose accumulation by a number of pathways including food and water ingestion, early and latent health effects, and economic costs. The specific atmospheric, surface water and groundwater pathways inputs to the model for this representative site location are those specified in the Surry site data file documented in the Level 3 analysis (Reference 7) and provided with WinMACCS.
(Appendix A of Reference 4)
The results with respect to the above pathways are documented in the WinMACCS analysis output files (Reference 7).
3-2 Rev. 0
EIS ACC/SA-9_Rev.1 - 1 / 2 KEPCO/KHNP REVISED 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-9 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 a discussion in ER Section 3, Base Risk, on the analytical process used for determining the risks from severe accidents. While Section 4 of APR1400-K-P-NR-013901-P Revision 1, SAMDA ANALYSIS, contains information about the process, this document is not referenced in the ER as to where this information can be found.
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.
EIS ACC/SA-9_Rev.1 - 2 / 2 KEPCO/KHNP This RAI is related to the Environmental Audit Information Needs ER-TI-8 (ML15198A023).
Response - (Rev. 1)
The Environmental Reports (ER) Section 3 will be revised to provide a clear reference to where the analytical process is developed (see Attachment).
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 Reports (ER) will be revised as shown in Attachment.
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APR1400 Applicants Environmental Report - Standard Design Certification
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- 7. APR1400-K-P-NR-13901-P, SAMDA Analysis, Rev. 1, Korea Electric Power Corporation and Korea Hydro & Nuclear Power Co., Ltd., December 2014.
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