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Category:Meeting Summary
MONTHYEARML23228A0152023-08-21021 August 2023
Teleconference Summary Z Area Saltstone Disposal Facility Groundwater Monitoring Call with South Carolina Department of Health and Environmental Control
ML22159A3552022-06-0909 June 2022
Summary of May 19, 2022 U.S. Nuclear Regulatory Commission Technical Call with U.S. Department of Energy Regarding Savannah River Site Saltstone Disposal Facility
ML22131A3482022-05-12012 May 2022
Enclosure - Summary of April 28, 2022 Nrc/Doe Teleconference to Discuss Technical Review Report (Trr) Related to Tank 12H (ML20296A550)
ML22094A1612022-04-0707 April 2022
Summary of March 29 2022 NRC-DOE Teleconference to Discuss Type I and II Tank SA Trr Findings and Geochemical Modeling
ML22014A0702022-01-14014 January 2022
Summary of January 11, 2022, Nrc/Doe Teleconference to Discuss H-Tank Farm PA Updates, Status of SRS Tank Farm Closure Activities and Recently Issued Technical Reports
ML21239A0212021-09-0101 September 2021
Teleconference Summary Discussion with the U.S. DOE on Modeling of ET from the Closure Cover for the Sdf in the U.S. DOE Response to the U.S. NRC Request for Supplemental Information
ML21194A0732021-07-13013 July 2021
Summary of Teleconference Call to Discuss Type I and Type II Tank Special Analysis Goldsmim Model and Alternative Fast Zone Simulations
ML21026A0122021-01-27027 January 2021
DOE and NRC Meeting Dec 9 2020 Summary Tank Grout Exps Reviewed
ML19056A1112019-02-25025 February 2019
Summary of Meeting with U.S Department of Energy (DOE) to Provide Status of U.S NRC Waste Incidental to Processing (Wir) Monitoring Activities at the U.S Department of Energy, Savannah River Site
ML19056A1102019-02-25025 February 2019
Corrected Transcript for 02-12-2019 NRC Public Meeting
2023-08-21
[Table view]
Category:Memoranda
MONTHYEARML23256A2312023-09-27027 September 2023
Technical Review of Environmental Monitoring Reports for F- and H-Tank Farm Facilities at the Savannah River Site (Project No. PROJ0734)
ML23250A0252023-09-26026 September 2023
Cover Letter - Technical Review of Grout Documentation for Tank 12H at SRS H-Tank Farm Facility (Revision)
ML23262B3562023-09-26026 September 2023
Technical Review of Ancillary Equipment Inventory, Risk, Grout, F-Tank Savannah River Site
ML23228A0152023-08-21021 August 2023
Teleconference Summary Z Area Saltstone Disposal Facility Groundwater Monitoring Call with South Carolina Department of Health and Environmental Control
ML23108A1252023-04-18018 April 2023
Technical Review Reports Supporting the NRC Technical Evaluation Report Regarding the Us Department of Energy Savannah River Site
ML23059A4282023-03-10010 March 2023
Technical Information from the NRC February 1, 2023 Onsite Observation Visit to the Saltstone Disposal Facility at the Savannah River Site
ML21208A0512021-09-0101 September 2021
Technical Review Report Type I and II Tank SA PROJ0734 Memo
ML21239A0212021-09-0101 September 2021
Teleconference Summary Discussion with the U.S. DOE on Modeling of ET from the Closure Cover for the Sdf in the U.S. DOE Response to the U.S. NRC Request for Supplemental Information
ML21119A3162021-05-14014 May 2021
Technical Review Report Environmental Monitoring Report - PROJ0734
ML20296A5502020-11-23023 November 2020
Technical Review Report Tank 12H Grouting
ML19298A0922019-12-20020 December 2019
Technical Review of Tank 12H Waste Release Reports (Docket No. PROJ0734)
ML19277H5502019-12-18018 December 2019
Technical Review of the General Separations Area 2016 and 2018 Porflow Models and Associated Documentation Supporting the F-Area and H-Area Tank Farm Facility Performance Assessments at the Savannah River Site, Aiken, Sc
ML19280A0592019-12-17017 December 2019
Technical Review of Environmental Monitoring Reports for F-Area and H-Area Tank Farm Facilities
ML19289A5252019-11-27027 November 2019
U.S. Nuclear Regulatory Commission September 17, 2019, Onsite Observation Visit Report for the Savannah River Site Saltstone Disposal Facility
ML19058A2722019-10-21021 October 2019
Periodic Monitoring Report for the U.S. Department of Energy Non-High-Level Waste Disposal Actions for Calendar Year 2014 Through Calendar Year 2018 (Revision 6)
ML19219A0432019-08-0707 August 2019
Guidance Memo for September 2019 SRS Saltstone Disposal Facility Onsite Observation Visit
ML19031B2212019-05-28028 May 2019
Technical Review - Saltstone Waste Form Physical Degradation
ML19016A4682019-02-0707 February 2019
Guidance for the March 2019 Monitoring Onsite Observation Visit to the Savannah River Site F and H Tank Farms
ML19025A0692019-02-0101 February 2019
Detailed Technical Information from August 2018 Oov at SRS Tank Farm Facilities
ML18242A2592018-09-21021 September 2018
Waste Release Technical Review Report
ML18192A3282018-07-12012 July 2018
Guidance for the August 13-14, 2018, Monitoring Onsite Observation Visit to the Savannah River Site F and H Area Tank Farms
ML18158A1722018-06-29029 June 2018
Trr - Summary of NRC Activities Related to Review of DOE Sdf FY13-FY14 Special Analysis Documents-AC Ridge
ML18155A3892018-06-0606 June 2018
Guidance for the July 9-11, 2018, Monitoring Onsite Observation Visit to the Savannah River Site, Saltstone Disposal Facility
ML18095A1222018-05-22022 May 2018
5/22/18 Ridge: Technical Review: Update on the Projected Technetium Release from Saltstone
ML18117A4942018-05-17017 May 2018
Technical Review of Groundwater Monitoring at and Near the Planned Saltstone Disposal Facility
ML18051B0092018-04-20020 April 2018
4/20/18 Barr Letter/Report: Savannah River Site F-Tank Farm and H-Tank Farm Tank Environmental Monitoring Trr
ML17277B2352018-01-0808 January 2018
Technical Review of Final Inventory and Special Analysis Documentation for Tank 12h at Savannah River Site (Docket No. PROJ0734)
2023-09-27
[Table view] |
Text
September 1, 2021 MEMORANDUM TO: Melissa C. Ralph, Acting Chief Low-Level Waste and Projects Branch Division of Decommissioning, Uranium Recovery, and Waste Programs Office of Nuclear Material Safety and Safeguards Signed by McKenney, Christepher THROUGH: Christepher A. McKenney, Chief on 08/31/21 Risk and Technical Analysis Branch Division of Decommissioning, Uranium Recovery, and Waste Programs Office of Nuclear Material Safety and Safeguards FROM: A. Christianne Ridge, Senior Risk Analyst Signed by Ridge, Alavanja Risk and Technical Analysis Branch on 09/01/21 Division of Decommissioning, Uranium Recovery, and Waste Programs Office of Nuclear Material Safety and Safeguards
SUBJECT:
TELECONFERENCE
SUMMARY
- DISCUSSION WITH THE U.S. DEPARTMENT OF ENERGY ON MODELING OF EVAPOTRANSPIRATION FROM THE CLOSURE COVER FOR THE SALTSTONE DISPOSAL FACILITY On August 26, 2021, the U.S. Nuclear Regulatory Commission (NRC) staff held a technical call with staff and contractors of the U.S. Department of Energy (DOE) to discuss the DOE model of the closure cap of the Saltstone Disposal Facility (SDF) at the DOE Savannah River Site. The NRC staff held the call to support the staffs review of the DOE 2020 SDF Performance Assessment (PA) (available in the NRCs Agencywide Documents Access and Management System [ADAMS] under Package Accession No. ML2019A055). The discussion related to the revised closure cap model (available in ADAMS under Accession No. ML21160A064) that the DOE submitted in response to the NRC Request for Supplemental Information (available in ADAMS under Accession No. ML20254A003).
CONTACT: A. Christianne Ridge, NMSS/DUWP 301-415-5673
M. Ralph The NRC staff noted that the revised closure cap model projected that the infiltration rate would decrease as the projected thickness of the layer of soil above the erosion barrier decreased due to erosion. The NRC staff questioned that result because the main processes by which an evapotranspiration (ET) cover limits infiltration are water storage and ET, and a covers capacity for both water storage and ET depends on the soil layer thickness. The NRC staff noted that, in the DOE document that describes closure cap model, the DOE indicated that the counter-intuitive result could be explained by increased run-off. However, the NRC staff indicated that in the water balances the DOE provided (available in ADAMS under Accession No. ML21196A077), ET accounts for a much larger fraction of the water balance than runoff does, irrespective of soil layer thickness.
The NRC staff also noted that the DOE model projected significant ET even when the soil layer above the erosion barrier reached zero thickness. The NRC staff questioned that intermediate model result because the DOE also had assumed that plant roots would not penetrate the erosion barrier. Consequently, in the DOE conceptual model, plants could not live and transpire water without a soil layer above the erosion barrier.
The DOE acknowledged the NRC staff concern and proposed that the DOE evaluate plant-related parameters in the closure cap model. The DOE indicated that it expected that correcting the plant-based parameters would decrease projected ET and increase projected runoff without significantly changing the projected infiltration rate. The NRC staff noted that increased projected runoff would affect the NRC staff review of erosion of the closure cap. In response to an NRC question, the DOE indicated that it would inform the NRC staff of the expected date of providing revised information after it had an opportunity to evaluate the effects on the closure cap model.
Call Participants U.S. NRC U.S. DOE U.S. DOE Contractors Hans Arlt Pat Suggs Steven Hommel Christepher McKenney Larry Romanowski A. Christianne Ridge Kent Rosenberger Harry Felsher
Memo ML21239A021 NMSS/DUWP NMSS/DUWP NMSS/DUWP OFFICE NMSS/DUWP/RTAB
/RTAB /RTAB /LLWPB NAME ARidge AR HArlt HA HFelsher HF CMcKenney CM DATE Aug 27, 2021 Aug 30, 2021 Aug 30, 2021 Aug 31, 2021 NMSS/DUWP OFFICE
/RTAB NAME ARidge AR DATE Sep 1, 2021