ML20138F802
| ML20138F802 | |
| Person / Time | |
|---|---|
| Issue date: | 04/01/1997 |
| From: | NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| To: | |
| Shared Package | |
| ML20138F067 | List: |
| References | |
| REF-WM-67 NUDOCS 9705060054 | |
| Download: ML20138F802 (3) | |
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ENCLOSURE U.S. NUCLEAR REGULATORY COMMISSION DIVISION OF WASTE MANAGEMENT Report No.
WM-67/97201 Docket No.:
WM-67 Licensee:
U. S. Department of Energy (DOE)
Facility:
Ambrosia Lake Mill Location:
McKinley County. New Mexico Date:
April 1, 1997 Inspectors:
Kenrieth R. Hooks. Project Manager and Team Leader, Division of Waste Management. Uranium Recovery Branch (DWM/ URB) l Daniel S. Rom, Geotechnical Engineer. DWM/ URB T. L. (Ted) Johnson. Surlace Water Hydrologist DWM/ URB Approved By.
Charles L. Cain, Acting Chief Uranium Recovery Branch Division of Waste Management Attachments: :
Partial List of Persons Contacted List of Items Opened. Closed, and Discussed List of Acronyms 4
9705060054 970429 PDR WASTE WM-67 PDR
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l Reoort Details On Site Construction Review (88001) 1 Insoection Scope l
The inspectors conducted a routine, announced inspection of the Ambrosia Lake tailings pile.
The inspection was performed to aid in resolving settlement i
questions raised by the NRC staff during review of the Completion Report submitted to the NRC by letter dated November 22. 1996. The staff's concerns were documented in the NRC's letter to DOE dated March 26, 1997.
Observations and Findinas The inspectors walked the tailings impoundment to develop a better understanding of the configuration of the pile and the location of settlement monuments, and to observe any evidence of differential settlement since rock placement was completed in 1996.
A draft letter report by DOE contractor personnel which further explained settlement data and projections of future settlement was reviewed by the inspectors, and agreement was reached on modifications to clarify the report.
The DOE personnel were of the opinion that, even if the final settlement measurements were adversely affected by wind. long-term settlements would be satisfactory.
By providing a plot of predicted settlement versus the log of time, a suitable long-term settlement profile was provided.
The settlement versus log of time model conformed to accepted practice.
The DOE personnel agreed to submit the final report to the j
NRC for evaluation.
Conclusions l
Inspection of the tailings impoundment aided the inspectors in evaluating the possiblility of future differential settlement and formation of channels on the pile.
Further evaluation of the potential for settlement will be made upon receipt of the DOE report.
No deficiencies in the placement of riprap were noted by the inspectors.
EXIT MEETING
SUMMARY
An exit meeting was conducted at the conclusion of the inspection on April 1.
1997.
During this meeting, the inspectors reviewed the scope and findings of the inspection.
DOE personnel did not identify, as proprietary, any information provided to, or reviewed by, the inspectors.
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Attachment l' PARTIAL LIST OF PERSONS CONTACTED L
Mike Abrams, DOE Albuquerque Operations Office Bob Cornish, DOE Albuquerque Operations Office Barbara Bridgeman, Jacobs Engineering ITEMS OPENED. CLOSED. AND DISCUSSED Opened None were opened in this report.
l Closed None l
Discussed None LIST OF ACRONYMS USED DOE U. S. Department of Energy DWM Division of Waste Management i
URB Uranium Recovery Branch l
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