ML20198C242
| ML20198C242 | |
| Person / Time | |
|---|---|
| Issue date: | 06/14/1991 |
| From: | Gonzales R, Jacoby D NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| References | |
| REF-WM-48 NUDOCS 9106280195 | |
| Download: ML20198C242 (3) | |
Text
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BOX 25325 DENVER, COLORADO 80225 JJJ l 4 1991 URF0: ROG Docket No. WM-48 l
MEMORANDUM FOR:
Docket File No. WM-48 f
FROM:
R. O. Gonzales, Project Manager
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D. L. Jacoby, Project Manager
SUBJECT:
DURANGO FINAL INSPECTION DATE:
June 4, 1991
Participants:
NRC DOE R. O. Gonzales Steve Hamp D. L. Jacoby RAC - MK-Ferguson Co.
State of C0 Mark Thomson Pat Martinek Tim Harrell Steve Wille
Purpose:
To perform a final inspection of the Durango UMTRAP site while the RAC is still on the site.
Entrance Interview Following the introduction of all participants, the RAC site manager, Mark Thomson, presented a pictorial overview of the site to show as-built conditions of the Bodo Canyon disposal cell.
The procedures used to verify the gradation of the soil-rock matrix, used on the pi!c top, were also discussed.
Site Tour A tour of the disposal cell was performed by all of the participants.
Aspects of the tour included the following:
Settlement monuments.
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2 JLN I 4 1991 In place rock riprap on the outslopes of the disposal cell and in diversion ditches.
Halding pond which is being used to store water being drained from the cell.
Prior to its release to an adjacent creek, the stored water is treated to meet Colorado state requirements.
Treatment procedures were discussed.
Areas that have been seeded and mulched.
Locations of point-of-compliance wells.
During the site tour, the following items were observed by the staff.
Vegetation (grass) is beginning to germinate on the soil rock matrix of the pile top and in other seeded areas.
Areas which were sceded last fall are doing much better in that vegetation density is greater.
The in place riprap shows no segregation or displacement of the stones nor excessively uneven surfaces.
The rock / soil matrix surface of the pile has slight undulations.
- However, it is not expected that excessive ponding or flow concentrations will occur.
Site is not fenced.
'lowever, access to the disposal cell is controlled by a locked gate constructed from heavy steel pipe and radiation warning signs are conspicuously posted at intervals of about 100 feet.
Seepage was observed in a cut section at the upstream end of Ditch No. 2.
The seepage is probably not from the cell, and thus does not present any adverse safety significance.
However, it should be monitored to avoid any sloughing of the cut slope which could result in partial filling-in of the ditch.
Records Review During prior inspections, records were reviewed and no problems were identified.
Therefore, construction records were not reviewed during this inspection because a final Completion Report (fCR) for the site is being r
. prepared for submittal to NRC.
That fCR will include all construction and radiological measurement records.
In addition, the fCR will document that final conditions are in accordance with the approved Remedial Action Plan and that all EPA standards have been met.
All records will be reviewed at the appropriate time, and a Completion Review Report will be prepared by NRC to l.
document this review.
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3 JUN I 4 1991 Exit Interview Prior to leaving the site, tne NRC representatives met with DOE and the RAC to discuss the following technical issues that have to be addressed by DOE prior to the site being licensed by NRC.
Issues related to ground water.
These include the underground drain and associated holding pond, a surveillance and maintenance plan, and a ground-water compliance strategy for the processing site.
These issues were identifi d in a letter to DOE from NRC dated February 27, 1991.
DOE e
indicated that they are preparing a Prelicensing Custodial Care Program to handle these issues.
The document is scheduled to be submitted July 1991.
Additional information regarding thorium-230 contamination at the processing site must be included in the fCR.
Specific information required is identified in a May 31, 1991, letter to 00E from NRC.
The Completion Report is scheduled to be submitted fall 1991.
Transfer of land (land withdrawal) for highway right of way at the processing site.
Issues On May 17, 1991, DOE notified NRC-URF0 by telephone that the Durango final inspection was scheduled for June 4,1991.
This was confirmed in a letter dated May 21, 1991.
The June 4 date was not correct.
The final inspection was actually held by DOE on May 21, 1991, and NRC was not provided the opportunity to attend.
It is suggested that in the future, NRC be notified of the actual final inspection date.
R. O. Gon es Project P sger
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