ML060100074

From kanterella
Jump to navigation Jump to search
G20050885/LTR-05-0618 - Michael T. Ryan Ltr West Valley Demonstration Project (Wvdp) - ACNW Working Group Meeting
ML060100074
Person / Time
Site: West Valley Demonstration Project, P00M-032
Issue date: 02/03/2006
From: Reyes L
NRC/EDO
To: Ryan M
NRC/ACNW
Glenn, C NMSS/DWMEP x6722
Shared Package
ML060100051 List:
References
G20050885, LTR-05-0618
Download: ML060100074 (3)


Text

February 3, 2006 Dr. Michael T. Ryan, Chairman Advisory Committee on Nuclear Waste U.S. Nuclear Regulatory Commission Washington, D.C. 20555

SUBJECT:

WEST VALLEY DEMONSTRATION PROJECT - ADVISORY COMMITTEE ON NUCLEAR WASTE

Dear Dr. Ryan:

I am responding to your December 23, 2005, letter to the Chairman, related to the Advisory Committee on Nuclear Wastes (the Committees) October 19, 2005, working group meeting in Ellicottsville, New York, on the West Valley Demonstration Project (WVDP). The purpose of the meeting was to receive a status of decommissioning activities and to hear about the U.S.

Department of Energy (DOE) and the U.S. Nuclear Regulatory Commission (NRC) approaches to the WVDP performance assessment. This meeting was also attended by representatives of several State agencies, stakeholders, and members of the general public. Your letter provided the Committees views on the decommissioning and the application of performance assessment to evaluate decommissioning alternatives for this site. In particular, the Committee offered several observations and recommendations.

We appreciate the Committees thoughtful observations and recommendations. We agree that decommissioning activities at this site provide a variety of challenging issues. As the Committee states, the decommissioning activities need to address a number of complex technical issues, including the disposition of vitrified high-level waste, drummed and grouted supernatant, tanks, buildings, soil, groundwater, and buried waste with elevated levels of residual radioactive materials. We agree with the Committees observation that erosion adjacent to these disposal areas raises concerns about potential exposure of buried waste, and the importance of erosion modeling and analysis to inform decision-making on long-term performance and decommissioning. Site decommissioning is also complicated by the involvement of several Federal and State agencies with different regulatory requirements and responsibilities related to remediation activities.

The Committee recognizes that DOE and NRC use different approaches to performance assessment for the WVDP. DOEs approach is primarily deterministic, whereas the NRCs staff approach is probabilistic. We appreciate the Committees support for the staffs approach to performance assessment, which will enable a risk-informed review. Although the performance assessment is still in the early stages of development, it will serve to help inform our review to ensure that decommissioning actions proposed by DOE, demonstrate compliance with NRC decommissioning requirements.

M. Ryan We support the Committees recommendations concerning the need for staff to be well-prepared to review DOEs erosion modeling which will serve as the basis for choices of remedial technology for disposal areas, and the importance of using subsurface characterization data (including groundwater monitoring data for strontium) in its performance assessment to verify and build confidence in modeling predictions. Staff considers both recommendations to be important in conducting a comprehensive assessment of site performance. Both issues have been, and will continue to be, considered in the staffs review.

In summary, we appreciate the Committees observations and recommendations related to decommissioning of the West Valley site and the role of the performance assessment in that important effort. We will continue to keep the Committee informed about the results of the performance assessment, and the staffs ongoing review of decommissioning activities at this site.

Sincerely,

/RA/

Luis A. Reyes Executive Director for Operations cc: Chairman Diaz Commissioner McGaffigan Commissioner Merrifield Commissioner Jaczko Commissioner Lyons SECY

M. Ryan We support the Committees recommendations concerning the need for staff to be well-prepared to review DOEs erosion modeling which will serve as the basis for choices of remedial technology for disposal areas, and the importance of using subsurface characterization data (including groundwater monitoring data for strontium) in its performance assessment to verify and build confidence in modeling predictions. Staff considers both recommendations to be important in conducting a comprehensive assessment of site performance. Both issues have been, and will continue to be, considered in the staffs review.

In summary, we appreciate the Committees observations and recommendations related to decommissioning of the West Valley site and the role of the performance assessment in that important effort. We will continue to keep the Committee informed about the results of the performance assessment, and the staffs ongoing review of decommissioning activities at this site.

Sincerely,

/RA/

Luis A. Reyes Executive Director for Operations cc: Chairman Diaz Commissioner McGaffigan Commissioner Merrifield Commissioner Jaczko Commissioner Lyons SECY DISTRIBUTION: G20050885 DCD r/f DWMEP r/f M. Rodgers RidsNmssOd RidsEdoMailCenter EDO r/f SECY-LTR-05-0618 RidsOgcMailCenter ML060100051 OFFICE DWMEP: PM DWMEP: SC TechEd DWMEP: DD NAME CGlenn ASnyder EKraus DGillen DATE 01/13/06 01/13/06 01/10/06 01/17/06 OFFICE DWMEP:DD DWMEP:D NMSS:D EDO NAME SFlanders LWCamper JRStrosnider LAReyes DATE 01/17/06 01/19/06 01/27/06 02/03/06 OFFICIAL RECORD COPY