ML19318D282
| ML19318D282 | |
| Person / Time | |
|---|---|
| Issue date: | 05/19/1980 |
| From: | Scarano R NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| To: | Hazle A COLORADO, STATE OF |
| References | |
| REF-WM-22 NUDOCS 8007100431 | |
| Download: ML19318D282 (2) | |
Text
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Subject File i
MAY 1~91980 Mill File ret l
WMUR r/f WMUR c/f WM r/f NMSS r/f Mr. Albert J. Hazle, Director JRothfleisch Radiation and Hazardous Wastes RScarano Control Division RBrowning Colorado Department of Health JBMartin l
4210 East lith Avenue WKerr l
Denver, Colorado 80220 l
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Dear Mr. Hazle:
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Pursuant to your February 26,'1980, request to G. Wayne Kerr, U.S. NRC,
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Office of State Programs, regarding the disposal of contaminated trash in the Cotter Corporation Canon City uraniur mill tailings impoundment, the applicant's proposal has been reviewed by the NRC staff and staff consultant.
The infonnation reviewed included a proposal by W. A. Wahler and Associates forwarded to you by Cotter on December 12, 1979, as well as additional information wpplied to you by E. J. McGrath on January 31, 1980.
From our review of this material, we have concluded that disposal of contaminated solid waste materials in the Hypalon lined tailings impound-ment at the Canon City uranium mill following the procedures described t.
L in the applicant's proposal will have go adverse impact on the designed function of the impoundment.
It is recommended that authorization of the proposed disposal method include the fo11Mng conditions:
f (a) Placement of the two-foot. layer of sandy gravel on top of the one-foot zone 5 material covering the liypalon liner shall be conducted as described in the enclosure to the applicantss submittal of December 12, 1979, with daily documented inspections conducted during the construction phase.
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(b) Representative samples of the sandy gravel shall be taken I
during construction and documented tests performed to verify that it is GW or GP soil according to the Unified Classification System having a particle size distribution equivalent to that tabulated in the enclosure to the applicant's submittal dated January 31,1980.
A copy of our consultant's coments is enclosed for your #iles.
8007160 OFFICE f..
SURNAME.
DATE.
NRCFORM 318,(940 NRCM 0240 D U.S. GOV E RNMENT PRINTING OFFICE: 1979-249-369
e Mr. Albert J. Hazie 2-MAY 191980 This letter represents the completion of NRC femal involvement in this project. However, we will remain available for telephone consultatisa_.
with your staff should the need arise.
a Sincerely, original signed By:.
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Ross A. Scarsno, Chief Uranitsu Recovery Licensing Branch
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Division of Waste Management
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Enclosure:
As stated cc: Mr. R. Gamewell, CDH
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l 5/14/80 OFFICE )
fL WMUR 7 WMU j
suRNouEF.QRoth,fl.,sch,:ng, RScar..,g, 5//5/80 5//f /80 DATEk GeAC FORM 318 }9 76) NRCM C240 DU.S.GOVER$ MENT PRINTING OFFICE: 1979 289 369 t
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Colorado State University Civil Engineering Department Fort. Collins, Colorado 80523 April 21, 1980
-J. E. Rothfleisch Uranium Recovery Licensing Branch
-Division of. Waste Management U.S. Nuclear Regulatory Commission W, ashington, D.C. 20555
Subject:
Cotter Corporation:
Disposal of Contaminated Solid Wastes in New Tailings Impoundment.
Dear Jack:
I have reviewed the material which you.have sent me regarding the placement of contaminated ' solid waste material in the new tailings ' impound-cent at the Canon City uranium mill. -In general, it is my opinion that the proposed scheme will not adversely affect the proper function of the tail-ings. impoundment. The proposal indicates that two feet of sandy gravel will be placed over a one-foot cover over the.Hypalon liner.
The gradation
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.information incluied in the letter from Forrest Gifford dated January 17, 1980 indicates that the material would be classified as a GW or GP soil according-to the Unified Classification System. The coarse grain size of the cover is important in that it will provide a stable cover that.is resis-tant to penetration by steel members in the 54 ?d waste.
During placement of the-additional cover over the Hypalon (pri.
to placing contaminated-solid waste) inspection of the cover material should proceed and samples shculd be taken to ensure that all cover material is a GW or GP material.
It is also stated in the proptsal that no equipment other than a D-8 dozer or-its equivalent will be placed on _ cover less than two feet in thickness.
However, a D-8 do'zer could cause disruption of the liner if it is permitted on relatively shallow cover.
I believe that the gravel cover should be placed by pushing it on to the existing cover with a minimum
-thickness of'12 inches.
The gravel cover can then be compacted by several passes of the dozer.
Subsequent lifts 'should be placed at a maximum loose th.ickness of 12 inches and compacted to 70% relative density or greater.
' Any. steel pieces of. irregular shape that could penetrate the cover and liner after subsequent placement of tailings or other waste material, should not be placed at this locations unless special precautions are taken-to prevent them.from penetrating the liner-(e.g., placement of additional gravel sized' cover or cut pieces to regular shape.)
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If you have any questions regarding this please call me, g
ery truly yours,;
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()D Mohn D. Nelson
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Professor
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