ML20151D826
| ML20151D826 | |
| Person / Time | |
|---|---|
| Issue date: | 06/28/1988 |
| From: | Hawkins E, Olsen T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| References | |
| REF-WM-41 NUDOCS 8807250254 | |
| Download: ML20151D826 (8) | |
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7 Docket File WM-41 PDR/DCS b DBangart, RIV WM-41/TT0/88/06/21/0 T01sen EHawkins DGillen, LLOB TJohnson, LLTB MF1iegel,'LLOB-JLN 281988 .BJagannath, LLTB LLO Branch, LLWM' RCPD,-UT URF0:TTO URF0-t/f Docket No. WM-41 MEMORANDUM FOR: Dccket File No. WM-41 FROM: Thomas T. Olsen, Project Manager Licensing Branch 1 Uranium Recovery Field Office, Region IV
SUBJECT:
SALT LAKE CITY (CLIVE) ON-SITE CONSTRUCTION REVIEW Date~ June 9, 1988 Location: Clive, Utah
Participants:
N_RC DOE Edward Hawkins (URFO) Richard Richey Thomas Olsen (URF0)
Dan Gillen (LLOB) TAC Ted Johnson (LLTB)
Myron Fliegel (LLOB) Ron Rager Banad Jagannath (LLTB) Mark Jackson STATE OF UTAH Ma k Day, Bureau of Radiation Control (BRC)
Lenwood Streed, Department of Transportation (DOT)
Mike Roshek, Department of Transportation (DOT)
The purpose of this visit was to conduct a review of construction activities at the disposal site at Clive, Utah, for the Salt Lake City UMTRA Project to determine if the quality control program is functioning in a manner that assures comoliance with the Remedial Action Plan and the EPA standards.
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WM-41/TT0/88/06/21/0
_ - M 28 l988 Entrance Interview Following an introduction of all participants, the NRC staff indicated that the review would consist of a tour of the site, observation of activities, review of records and an exit interview. Mark Day, the State of Utah project manager, described the status of remedial action construction and activities presently in progress and indicated that he and his site manager, Lenwood Streed, would be available to assist the NRC staff. Mr. Streed accompanied the NRC staff on a site tour and provided technical descriptions of all activities, both present and proposed.
Construction Status Mr. Streed described the status of the disposal site and explained that all of the tailings have been moved to the Clive site from Salt Lake ,
City. A majority of the radon barrier is already placed, together with bedding material and riprap. Only a small area on the south end remains open to accommodate tailings that are being dried before final placement in the disposal cell. All final tailings, radon barrier bedding and riprap placement are due to be completed this summer (1988).
Site Tour The State of Utah personnel conducted the NRC representatives and other participants on a tour of the site. Activities observed included the following:
reworking tailings and compaction, and moisture / density testing of compacted tailings (Nuclear gage and sand cone).
Other aspects of the project that were observed include:
placed rock riprap armor and bedding material on top, side slopes, and ditches, and placed radon barrier material on disposal cell.
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M 281988 Records Review
- 1. Contaminated Materials
- a. Approximately 520,000 cubic yards have been placed since June of 1987.
- b. Nuclear density gage tests performed 747. This is approximately one test per 700. cubic yards placed, and meets the frequency requirement in the RAIP.
- 2. Radon Barrier
- a. Approximately 230,000 cubic yards have been placed since May of 1987.
- b. Sand cone tests performed - 505. This is approximately one test per 430 cubic yards placed, and mee' the frequency requirements in the RAIP.
- c. Nuclear density gage tests performed - 260.
- 3. Rock (riprap) and Bedding Material Combined
- a. Approximately 105,000 cubic yards have been placed since July, 1987.
NOTE: Final count of all tailings placed is approximately 2.5 million yards.
Exit Interview Prior to leaving the site, the NRC staff met with the State, DOE and TAC personnel to discuss activities observed and findings during the review.
A list of the concerns was prepared and signed by representatives of the State, DOE and NRC (Enclosure 1).
Issues from Previous Site Review Issue: A review of the testing records indicates that only 15 sand ;
cone tests have been run to date on approximately 600,000 cubic yards of contaminated materials. According to construction l
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WM-41/TT0/88/06/21/0 J.N 2 8 1988 specifications, this volume of material would require approximately 60 sand cone tests to verify placement.
Also, records indicate that since spring activity began, 120,000 cubic yards of contaminated materials have been placed at the site. This volume of material would require approximately 12 sand cone tests. The Clive site records show that sand cone tests have not been run since November of 1985 to present. These are apparent inconsistencies in quality control procedure and do not meet specifications of engineering design for the project.
This issue has not yet been resolved and needs to be addressed.
New Issues There is concern about correlation of moisture / density results of the nuclear gage and sand cone testing. Records do not show that testing of cover material using the nuclear density gage can be verified by sand cone tests. Data observed in the records review suggests that the sand cone and nuclear gage do not approach a reasonable correlation and that moistures as tested by the Nuclear density gage for placed materials may not be within RAP specifications. Note that the use of the Nuclear density gage for testing the placement of cover material has been discontinued. **
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Frequency of gradation testing of rock was not verifiable through records. Gradation testing is required for any day when greater than 150 cy is placed. It could not be determined that this requirement had been met.
The riprap on the top of the pile was rutted by equipment movement in many places. To assure uniform thickness, extensive grading is necessary, followed by spot checking of thickness.
Riprap on sideslopes in several areas of the pile have observable areas where fine material is evident. Areas of segregation and exposed fines may indicate that adequate thickness of required rock is not present. Additionally, gradation requirements may not be met at this location where extensive fine material is present.
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WM-41/TT0/88/06/21/0 JE 281988 The armored ditches exhibit areas where adequate rock may not have been placed, uneven placement and areas where excessive fines appear to be present.
Observations Erosion of the exposed radon material is evident from recent storms.
These areas will have to be repaired before bedding material and riprap are placed. DOE and the State of Utah indicated that they plan to conduct repairs before any further activities resume.
/d Thomas T. Olsen, Project Manager Licensing Branch 1 Uranium Recovery Field Office Region IV Approved by: /5/
Edward F. Hawkins, Chief Licensing Branch 1 Uranium Recovery Field Office, Region IV
Enclosure:
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NAME : T01sen/lv : EHawkins : : : : :
DATE :88/06/27 : /a : : : : :
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