Sunday, May 16, 2021

NRC Public Workshop - Technical Basis for Guidance on Conducting and Evaluating Surveys of Residual Radioactivity in the Subsurface Soils of Licensee Sites

NRC Public Workshop - Technical Basis for Guidance on Conducting and Evaluating Surveys of Residual Radioactivity in the Subsurface Soils of Licensee Sites

On July 14-15, the U.S. Nuclear Regulatory Commission (NRC) is holding a public workshop on the technical basis for guidance on conducting and evaluating surveys of residual radioactivity in the subsurface soils of licensee sites. The NRC began to address this problem in NUREG/CR 7021, “A Subsurface Decision Model for Supporting Environmental Compliance,” issued January 2012.

Workshop Format:
This will be a virtual-only meeting and attendance will be via Microsoft Teams (links to be provided at a later date). Detailed webinar information and other meeting details will be posted to the public meeting notice website: https://www.nrc.gov/pmns/mtg?do=details&Code=20210553
Workshop Agenda:
The agenda is still being developed. The current plan is to have a mix of pre-recorded presentations and open discussions. Parties interested in presenting should contact the NRC meeting organizers.
 
Workshop Topics:
The purpose of this workshop is to gather information on the subject areas below.  Discussion topics to be covered during this workshop may include:


1. Subsurface radiological surveys ranging from historical site assessments, scoping, characterization, remedial action, confirmatory, and final status surveys.

2. DCGLs for contaminants in the subsurface and use of multiple DCGLs for surface and/or subsurface layers. Evaluating elevated areas or hot spots (DCGLEMC) for potential doses to receptors including the inadvertent intruder.

3. Evaluation of sites with geospatial and statistical methods.

· Statistical methods and geospatial modeling tools and software to analyze contaminant distributions and optimize sampling and scanning of the sub-surface.

· Methods to determine the sample density, spatial distributions, depths, and volume to achieve a level of confidence and limit decision errors.

· Applicability of MARSSIM statistical tests and other alternative methods.
Treatment of uncertainty and data sufficiency.
Applicability of “composite sampling” or surrogate ratios.


4. Applicability of Scenario B for subsurface residual radioactivity and demonstrating indistinguishability from background.

5. Methods to survey large subsurface soil excavations and survey of soils for reuse in large excavations including use of conveyor belts and other methods.

The executive summary to a draft Technical Letter Report by SC&A (see link below) outlines some key issues related to sub-surface characterization and surveys for decommissioning, and in some cases suggests approaches to resolving those concerns. Attendees are strongly encouraged to have read or be familiar with the nomenclature and procedures of the MARSSIM document, as analogous terminology and many of the same concepts may be useful for subsurface surveys as well. This is already reflected in the discussion topics listed above, in NUREG/CR 7021, and the SC&A executive summary.

Key References:
Executive Summary, “Guidance on Surveys for Subsurface Radiological Contaminants,” Draft Technical Letter Report,” SC&A April 2021. ML21123A229


NUREG-1575, “Multi-Agency Radiation Survey and Site Investigation Manual (MARSSIM),” Revision 1, issued August 2000 (NRC 2000). MARSSIM Rev. 2 is soon to be issued for public comment but is available for early download at the EPA’s Science Advisory Board website: https://yosemite.epa.gov/sab/sabproduct.nsf/RSSRecentAdditionsBOARD/E1D35FEB397932FF8525854D00836CFA


NUREG/CR 7021, “A Subsurface Decision Model for Supporting Environmental Compliance,” issued January 2012.

 

Workshop Contacts:
Mark Fuhrmann, mark.fuhrmann@nrc.gov & Tom Aird, thomas.aird@nrc.gov

Thank you.
 

Anne Fream
Administrative Assistant
Nuclear Regulatory Commission
Office of Nuclear Material Safety and Safeguards
Division of Decommissionning, Uranium Recovery,
and Waste Programs
301-415-0645
anne.fream@nrc.gov

 

Friday, April 30, 2021

Peach Bottom Atomic Power Station, Units 2 and 3 - Security Baseline Inspection Report 05000277/2021401 and 05000278/2021401

Peach Bottom Atomic Power Station, Units 2 and 3 - Security Baseline Inspection Report 05000277/2021401 and 05000278/2021401

ADAMS Accession No.  ML21117A343

Friday, April 9, 2021

Slides for April 13, 2021, 1-4:30 pm EDT, NRC/NEI webinar on spent fuel performance margins

PowerPoint slides
Workshop between the U.S. Nuclear Regulatory Commission and Nuclear Energy Institute on Spent Fuel Performance Margins
See > https://www.nrc.gov/pmns/mtg <  for details 

--
Paul Gunter, Director
Reactor Oversight Project
Beyond Nuclear
7304 Carroll Avenue #182
Takoma Park, MD 20912
Tel. 301 523-0201 (cell)
www.beyondnuclear.org

Thursday, April 8, 2021

Exelon Generation Company, LLC - Request for Withholding Information From Public Disclosure

Subject:  Exelon Generation Company, LLC - Request for Withholding Information From Public Disclosure

ADAMS Accession No. ML21084A135

Wednesday, April 7, 2021

Response to Questions submitted March 12, 2021

                    Good morning, Eric.


This is in response to several of your questions regarding Exelon Generation Company, LLC’s (Exelon’s) Three Mile Island Generating Station, Units 1 and 2 (TMI-1 and 2 ) submitted on March 12, 2021.

Question 1: Provide the amount of water TMI can withdraw daily, and how much they pay for consumptive and surface water at TMI-1 and TMI-2.
 
As I stated previously, the consumptive use, surface withdrawal, and groundwater withdrawal approvals from SRBC have not changed yet as a result of the non-operating status. The docket approval for TMI-1 dates from 2011, and is attached for your review. SRBC does not have a docket approval for TMI-2.

The approved quantities at TMI-1 are:
Surface water withdrawal – up to 122.800 million gallons per day;
Groundwater withdrawal – 0.225 million gallons per day (as a 30-day average) from Wells A, B, and C;
Consumptive use – 19.200 million gallons per day (peak day).

The SRBC has no charges related to surface water withdrawals for any approved project. The project does not pay a consumptive use fee to the SRBC. The consumptive use is mitigated predominantly by releases of water stored in Cowanesque Reservoir during low flow periods, under an approved agreement (see Docket Section 7, no. 5).

Question 2:  Ask the NRC for the precise amount of water each reactor will need for decommissioning purposes, and inventorize the amount of water not used since TMI-1 no longer conveys heat from the reactor core to the steam turbine and there is no longer steam cycle heat transfers.

The SRBC has no information from the NRC at this time concerning the amount of water required for decommissioning.

The attached a spreadsheet shows SRBC’s data concerning the amount of recent water use at TMI-1. As you are aware, TMI-1 was taken offline and ceased operating for the purpose of generating electric power on September 20, 2019. The data brackets the time when operations ceased, containing reported daily water withdrawals from all sources and consumptive use from September 1, 2019 through December 31, 2020.

SRBC staff have not specific information at this time to answer your other questions regarding disposal of any radioactive wastewater. The SRBC will continue to coordinate with agencies of its member jurisdictions about all of the issues related to this project. 

Exelon staff indicated water withdrawal and consumptive use quantities are expected to continue to exceed Commission regulatory thresholds, but at a much lower magnitude due to cessation of power generation. As such, and recognizing the change in operations, Commission staff will review the water withdrawal and consumptive use demands, from all sources, based on the Facility’s reasonable and foreseeable need to adequately address ongoing decommissioning activities. Commission staff anticipate that this review will be done as part of the groundwater well renewal applications, required by May 26, 2021.

Thank you again for your patience as we work to obtain clarity on the key water issues related to decommissioning.

Best regards,
Paula

Paula Ballaron, P.G.
Manager, Policy Implementation & Outreach
Susquehanna River Basin Commission
4423 North Front Street
Harrisburg,  Pennsylvania 17110-1788
Office:717-238-0423 Ext - 1222
Mobile:  717-215-0455
Your River ~ Our Mission 

---
Subject:
 Re: Before the SRBC, (Testimony of Eric J. Epstein, December 11, 2020)

Folks:


          These questions were resubmitted at today's public hearing.
In our opinion, the initial responses were general  and vague.
I wrote the questions in the hope of providing clarity, and to
make sure you got the questions free from technical interference.

         In addition, to requesting more specific responses to the
January 27, 2021 requests, I also asked the SRBC  to:

1) Provide the amount of water TMI can withdraw daily, 
and how much they pay for consumptive and surface water
at TMI-1 and TMI-2;

2) Ask the NRC for the precise amount of water each reactor 
will need for  decommissioning purposes, and inventorize 
the amount of water not used since TMI-1  no longer coneys
heat from the reactor core to the steam turbine and there 
is no longer steam cycle heat transfers; 

3) Requests from the DEP and the NRC for TMI-1's and
TMI-2's plan(s) to dispose of radioactive water created 
by the decommissioning processes; and,

4) Identify CWA obligations as it pertains to what entity actually 
owns the water rights at TMI.

         Gene and Paula did contact me during the meeting, and Gene
reached out after the meeting. Unfortuantley, I've been in zoom
meetings all afternoon. I will return to the office on Monday.


Have a great weekend!

Eric Epstein

TMI Reporting Data.XLSX
20110610.PDF