ML21215A085
| ML21215A085 | |
| Person / Time | |
|---|---|
| Site: | HI-STORE |
| Issue date: | 08/03/2021 |
| From: | Holtec |
| To: | Office of Nuclear Reactor Regulation |
| Cuadrado-Caraballo J | |
| References | |
| Download: ML21215A085 (7) | |
Text
www.holtec.com Holtec International - HISTORE RAIs - Chapter 2
Chapter 2 RAIs
RAI 27
NRC requests bases for assumptions in explosion hazards evaluation Holtec response will perform dispersion analysis
RAI 28
NRC requests basis for drilling permissions Holtec will provide information to support this statement RAI 212 NRC requests legend for Figure and potash mining restrictions Holtec will provide the requested information RAI 214 NRC requests information on hazardous chemical transport by road or rail Updated hazards evaluation including hazardous chemicals to be provided www.holtec.com l Page 2
Chapter 2 RAIs - PMP / Flood RAI 2161 NRC requests basis for precipitation estimate (point vs areal)
Holtec response will remove discussion of the 100 year storm in question and only present the design storm from the PMP/PMF report.
RAI 2162 - NRC requests technical basis for using the CONM study The PMP/PMF report has been revised to include additional technical detail and justification for the CONM method as well as using the bounding case between CONM and HMR for each storm case.
RAI 2171 - NRC requests modeling information related to Laguna Gatuna and Laguna Plata Holtec has removed the 100 year storm.
The PMP/PMF report and data package includes modeling detail about the Laguna Gatuna, Laguna Plata, and Laguna Tonto watersheds.
www.holtec.com l Page 3
Chapter 2 RAIs - PMP / Flood RAI 2172 - NRC requests details on the curve numbers (CNs) utilized The updated PMP/PMF report includes sensitivity studies to show the selected curve numbers are applicable.
RAI 218 - NRC requests justification for use of generic parameters The updated PMP/PMF report includes sensitivity studies to show the applicability of the selected parameters.
Holtec is providing additional description of the deterministic design approach used as discussed in NUREG/CR 7046.
RAI 219 - NRC requests impact of onsite flooding to ITS components Holtec is addressing the effects of floodwaters on affected ITS components and presenting mitigating actions for erosion.
www.holtec.com l Page 4
Chapter 2 RAIs - PMP / Flood RAI 220 - NRC requests additional analyses to address Laguna Gatuna hydraulic structure impacts Holtec has removed the 100 year storm from the SAR.
RAI 222 - NRC requests additional information on rail embankment impact of flood modeling Holtec will provide discussion of the modeling consideration of the rail embankment.
For all of these RAIs, Holtec plans to submit an updated flood report which will address these concerns www.holtec.com l Page 5
Chapter 2 RAIs RAI 229 NRC requests updated reference Holtec will provide with RAI responses RAI 232 NRC requests liquefaction reference Holtec will provide with RAI responses www.holtec.com l Page 6
Chapter 2 RAIs - end of August RAI 233 NRC requests justification for geotechnical parameters used in the Bearing Capacity report Holtec is revising this report to address the bulleted items addressed in the RAI Experienced Geotechnical Engineers with GEI are assisting with justifying material properties and/or recommending more accurate properties as necessary RAI 242 NRC requests details on the Chinle formation characteristics Holtec is revising the Bearing Capacity/Settlement report to address this concern Experienced Geotechnical Engineers with GEI are assisting with justifying the correct layered system to accurately calculate and estimate the bearing capacity and settlement.
www.holtec.com l Page 7