Regulatory Guide 3.11: Difference between revisions

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{{#Wiki_filter:June 1973 U.S. ATOMIC ENERGY COMMISSION
{{#Wiki_filter:June 1973 U.S. ATOMIC ENERGY COMMISSION
REGULATORY
                              REGULATORY
DIRECTORATE  
                                DIRECTORATE OF REGULATORY STANDARDS
OF REGULATORY  
                                                                                                                              GUIDE
STANDARDS GUIDE REGULATORY  
                                                                REGULATORY GUIDE 3.11 DESIGN STABILITY OF EMBANKMENT RETENTION SYSTEMS FOR URANIUM MILLS
GUIDE 3.11 DESIGN STABILITY  
OF EMBANKMENT  
RETENTION  
SYSTEMS FOR URANIUM MILLS  


==A. INTRODUCTION==
==A. INTRODUCTION==
Each licensee who piocesses or refines ore in a uranium mill is required to comply wiih the provisions of 10 CFR Part 20. "Standards for Protection Against Radiation." Section 20.106. "Concentrations in EIffluents to Unrestricted Areas." generally provides that licensees shall not possess. use. or transfer licensed material s) as to release to anl unrestricted area radioactive material in concentrations which exceed the limits. spccified in Appendix B. Tablc II of Part 20.The milling ol' uranium ore results in the production of large volu nues of liquid and solid wastes. (tailings)
retention systemn. the perifeability of the soil on which tailings are deposited. and the materials with which the embanknments are constructed. It is imnportant that these Each licensee who piocesses or refines ore in a uranium mill is required to comply wiih the provisions embankment retention systems be designed and of 10 CFR Part 20. "Standards for Protection Against constructed in accordance with sound engineering principles to assure that they will maintain dtcir Radiation." Section 20.106. "Concentrations in EIffluents to Unrestricted Areas." generally provides that structural integrity. Several analytical methods are available that may be used to determine the stability of licensees shall not possess. use. or transfer licensed material s) as to release to anl unrestricted area emnbankments for various heights and slopes. seepage radioactive material in concentrations which exceed the                               conditions, and soil strengtl" parameters. The results of such stability analyses should demonstrate an acceptable limits. spccified in Appendix B. Tablc II of Part 20.
both of which usually contain concentrations of radioactive material in excess of those specified in Table .11, Appendix B of Part 20. It is therefore necessary to confic such liquid and solid tailings and prevent their release to the environment.


Conflnement is usually acconmplished by the construction of an embankment retention system. This regulator), guide specifies acceptable methods of analyzing the stability of embankments.
factor of safety against failure for all pertinent design conditions.


minimum acceptable safety factors that are applicable during construction and use of embankment retention systems, and acceptable surveillance procedures.
The milling ol' uranium ore results in the production of large volu nues of liquid and solid wastes. (tailings) both of which usually contain concentrations of radioactive                                                 


==B. DISCUSSION==
==C. REGULATORY POSITION==
'The design, construction.
material in excess of those specified in Table .11, Appendix B of Part 20. It is therefore necessary to                                    I.    Basic Design Considerations confic such liquid and solid tailings and prevent their                                      Embankment retention systems for uranium mill release to the environment. Conflnement is usually                                    tailings should be designed to assure structural integrity acconmplished by the construction of an embankment                                    during the intended lifetime of the system. The stability of retention system. This regulator), guide specifies                                    an embankment retention syslemn should be evaluated acceptable methods of analyzing the stability of                                      for construction and operating conditions utilizing the embankments. minimum acceptable safety factors that                                    expected in situ engineering properties of the foundation are applicable during construction and use of                                          and embankment materials and pertinent geologic embankment retention systems, and acceptable                                          information.


and size of embankment retention systems for uranium mill tailings will vary significantly from one milling location to another. The characteristics of these systems will depend on such diverse factors as the capacity of the mill. the type of ore processed.
surveillance procedures.


the amount of waste produced.
2.    Methods of Stability Analysis The acceptable methods of analyzing tihe stability of  


the amount of solution impounded, the type of milling process, the topography of the area in which thle mill is located, the amount of land thai is available for the retention systemn. the perifeability of the soil on which tailings are deposited.
==B. DISCUSSION==
 
embanknients are the adaptations of lte circular arc method. Other proven methods of analyzing stability.
and the materials with which the embanknments are constructed.
 
It is imnportant that these embankment retention systems be designed and constructed in accordance with sound engineering principles to assure that they will maintain dtcir structural integrity.
 
Several analytical methods are available that may be used to determine the stability of emnbankments for various heights and slopes. seepage conditions, and soil strengtl" parameters.
 
The results of such stability analyses should demonstrate an acceptable factor of safety against failure for all pertinent design conditions.
 
C. REGULATORY
POSITION I. Basic Design Considerations Embankment retention systems for uranium mill tailings should be designed to assure structural integrity during the intended lifetime of the system. The stability of an embankment retention syslemn should be evaluated for construction and operating conditions utilizing the expected in situ engineering properties of the foundation and embankment materials and pertinent geologic information.
 
2. Methods of Stability Analysis The acceptable methods of analyzing tihe stability of embanknients are the adaptations of lte circular arc method. Other proven methods of analyzing stability.
 
such as the sliding wedge method. may be used if they are more applicable to the particular situation being considered.
 
3. Design Conditions for Analysis Stability analyses of embankments should be l.performed for the following design conditions:
a. End of Construction (upstream and downstream slopes): USAEC REGULATORY
GUIDES Copies of published guides may be obtained by request indicating the divisions desired to the US. Atomic Energy Commission.
 
Washligton.
 
DC. 20545.
 
Guides are Issued to describe and make available to the public Attentson:
Diretior of Regulatory Standards.
 
Comments and suggetions lot methods acceptable to the AEC Regulatory staff of implementing specific paris of imrtovements in thema guides ere encouraged and should be sent to the Secretary the Commission's regulations, to delineate techniques used by the staff in of the Commlision.
 
U.S. Atomic Energy Commission.
 
Washington.
 
D.C. 20545.ovaluating specific ptoblems or postulated accidents, or to provide guidance to Attention:
ChlefPublic Proceedings Steff.applicents.
 
Regulatory Guides are not substitutes for regulations and compliance with them Is not required.
 
Methods and solutions different from those Set Out in The guides Are itsued in the following ten broad divitions:
the guides will be acceptable If they provide a basis for the findings requitite to the issuance or continuance of a oermit or license by the Commistsion.
 
1. Power Reactors 8. Products permt by2. Research and Trest Reactors 7. T'ransportation
3. Fuels and Matefiets Facilities
8. Occupational Health Published guides will be revised periodically.


as appropriate.
'The design, construction. and size of embankment                              such as the sliding wedge method. may be used if they retention systems for uranium mill tailings will vary                                are more applicable to the particular situation being significantly from one milling location to another. The                                considered.


to accommodate
characteristics of these systems will depend on such diverse factors as the capacity of the mill. the type of                              3.    Design Conditions for Analysis ore processed. the amount of waste produced. the                                            Stability analyses of embankments should be amount of solution impounded, the type of milling                                    l.performed for the following design conditions:
4. Environmental and Siting 9. Antitrust Review comments and to reflect new Information or eipetlence.
process, the topography of the area in which thle mill is                                    a. End of Construction (upstream and located, the amount of land thai is available for the                                downstream slopes):
                      USAEC REGULATORY GUIDES                                      Copies of published guides may be obtained by request indicating the divisions desired to the US. Atomic Energy Commission. Washligton. DC. 20545.


5. Materials and Plant Protection iO. General c. NI.Iir I ml tII So Poo (tSIICJ21II
Reg*.;ory Guides are Issued to describe and make available to the public            Attentson: Diretior of Regulatory Standards. Comments and suggetions lot methods acceptable to the AEC Regulatory staff of implementing specific paris of    imrtovements in thema guides ere encouraged and should be sent to the Secretary the Commission's regulations, to delineate techniques used by the staff in          of the Commlision. U.S. Atomic Energy Commission. Washington. D.C. 20545.
lIi)J1C llIi. I 4. Minimum Factoi s of &&fe1y lO~ IlLIS SpC~h'Ii in IC, 0) klo\ pojlis Ilii C*.2.'Iiou'ld anII'i.IdC
~ t aCC pt aic l :C t)I it' -,.It -e.i1-1:iI1sl IjIilhCl t' fi ll ; III I IiincrI L10 11-111 0011dilliillS.


NI u 110)1 :IC CI' abC ld oi~ ii sl C I le ar 2.i\tCll ill I Ic S Surveillance~
ovaluating specific ptoblems or postulated accidents, or to provide guidance to    Attention: ChlefPublic Proceedings Steff.
A rqgllnIar p !11 oarOf SiL-ilvulanICC
Mind II1,0110na,1CC
sh ould hl' es i abNi si d it) deleCci and repair dam age resnIi~l1~tl Ioitim Cilviroimneiii al or othlier ciCCI which nmnlniil lend to lessen life i lllgrilv ol' tlre cinhankinewn relent ii))) msleiCII.


(;enerallx.
applicents. Regulatory Guides are not substitutes for regulations and compliance with them Is not required. Methods and solutions different from those SetOut in      The guides Areitsued in the following ten broad divitions:
the guides will be acceptable If they provide a basis for the findings requitite to the issuance or continuance of a        or license by the Commistsion.


Visuial il)SpcCI1ions
oermit                                        1. Power Reactors                        8. Products permt by2.                                  Research and Trest Reactors            7. T'ransportation
()I1 a jeciular liasi ;liC acceplabIC
                                                                                      3. Fuels and Matefiets Facilities        8. Occupational Health Published guides will be revised periodically. as appropriate. to accommodate          4. Environmental and Siting              9. Antitrust Review comments and to reflect new Information or eipetlence.                                5. Materials and Plant Protection        iO. General
mnless circumllstanIces indicate olherw~isC.


R~epair oii damage rcit) loig froini anyl cause%klidlic icli.!l l eind it. ICsseI file iliuL!erit\'  
c.    NI.IirI mltII So                  Poo          llIi. I lIi)J1C
ol tIle emlaik)inewlL'l icIeiiI ) S\vsIcili shoiliid lie perl'Orned ais N0011 :ipssil Iii.\h illiiC11iidtii.
                                                            (tSIICJ21II                                  SSurveillance~
                                                                                                              A rqgllnIar p oarOf      !11          SiL-ilvulanICC Mind II1,0110na,1CC
                                                                                                    sh ould hl' es i abNi si d it) deleCci and repair dam age resnIi~l1~tl      Ioitim Cilviroimneiii          al or othlier          ciCCI which nmnlniil lend to lessen life i lllgrilv ol' tlre cinhankinewn
4.      Minimum Factoi s of &&fe1y                                                                  relent ii))) msleiCII. (;enerallx. Visuial il)SpcCI1ions ()I1 a jeciular liasi ;liC acceplabIC mnless circumllstanIces indicate lO~ IlLIS
                SpC~h'Ii        in  IC, klo\0)        pojlis Ilii      C*.2.                      olherw~isC. R~epair oii damage rcit)loig froini anyl cause
'Iiou'ld                            ~  t aCC pt anII'i.IdC                  aicl
                                                                  :C      t)I it' -,.It-e            %klidlic       icli.!l leind it. ICsseI file iliuL!erit\' ol tIle
.i1-1:iI1sl    IjIilhCl      fit' ll ; IIII IiincrI          L10 11-1110011dilliillS.              emlaik)inewlL'l           icIeiiI     ) S\vsIcili   shoiliid     lie perl'Orned ais NI:ICu CI'
                        110)1abC ld oi~ ii            sl C I arle 2.i\tCll ill I Ic                N0011 :ipssil Iii.\h illiiC11iidtii.              PCI(lijfurct      It'm ii1(lllimuiullg tile L. *siyi Cond m ,L                                  .0initrim F,1001; Ofl SaLei                                  ad
                                                                                                    'ol.dISii',              s:1CI
                                                                                                                                  I        it,      :eC Cmbanlkluiiei,            TheC  bImic Iiis-11liml)Clit        l)ect~ictIli['Mh ,llit)Illilm      iljwiL    ale pic/ol)1cle)
      IEnd ol" onsC      *      Iti..n ...........................                          4..    I' in      C1siilu 11clvalct ) p ;Siire                        n    si~loNipeilndicalll s Pa:irtial I' l ..............................                                    I..
      Mlaxiimuui            r...I...Pool              .i...................I                      Cii'ik ilhIk          Ile11S.      T Ife    C \ ICellI      to      %\winch    Stich I;rd .tltliak' ( I'* Al l tl'      l    .ll), v,.                                                  il~ttul~entaiti        ieed lit iitatlld w\ill lie evalumaed                    b1%
        cbnditions wvill; s.ismi. loadings)I.. . .........                              I.I)      tilt: 0 1m gsii                10)I.SI
                                                                                                                                Il ill)  ;Iis      1          basis.


PC I(lijfurct It'm ii1(lllimuiullg tile'ol.dIS ii', ad s:1CI I it, :e C Cmbanlkluiiei, TheC bImic Iiis-11liml)Clit l)ect~ictIli
SelIection)           of tlie           aipph))ia~le             %eismilc c'CI¢jciein         shuild bl           baLsed (Ill t he               ;Iiaxinllit caiillkill-Ak         LhCice.illit.i on he bisis ol liso;ic
['Mh ,llit)Illilm iljwiL ale pic/ol)1cle)
                                                                                                1.I
I' in C1siilu 11clvalct ) p ;Siire n si~loNipe ilndicalll s Cii'ik ilhIk Ile 11S. T Ife C \ ICellI to %\winch Stich il~ttul~entaiti ieed lit iitatlld w\ill lie evalumaed b1%tilt: 0 1m gsii 10)I.SI Il ill) 1 ;Iis basis.L. Cond , m L.0initrim F,1001; Ofl SaLei IEnd ol" onsC Iti..n ...........................
                                                                                                  1-2}}
4..Pa:irtial I' l ..............................
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I;rd .tltliak ' ( Al l tl' l .ll) , v,.cbnditions wvill; s.ismi. loadings)I..
..........
I.I)SelIection)  
of tlie aipph))ia~le  
%eismilc c'CI¢jciein shuild bl baLsed (Ill t he ;Iiaxinllit caiillkill-Ak LhCice.illit.i on he bisis ol liso;ic 1.I 1-2}}


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Revision as of 10:18, 4 November 2019

Design Stability of Embankment Retention Systems for Uranium Mills
ML13350A256
Person / Time
Issue date: 06/30/1973
From:
US Atomic Energy Commission (AEC)
To:
References
RG-3.011
Download: ML13350A256 (2)
v • d • e


June 1973 U.S. ATOMIC ENERGY COMMISSION

REGULATORY

DIRECTORATE OF REGULATORY STANDARDS

GUIDE

REGULATORY GUIDE 3.11 DESIGN STABILITY OF EMBANKMENT RETENTION SYSTEMS FOR URANIUM MILLS

A. INTRODUCTION

retention systemn. the perifeability of the soil on which tailings are deposited. and the materials with which the embanknments are constructed. It is imnportant that these Each licensee who piocesses or refines ore in a uranium mill is required to comply wiih the provisions embankment retention systems be designed and of 10 CFR Part 20. "Standards for Protection Against constructed in accordance with sound engineering principles to assure that they will maintain dtcir Radiation." Section 20.106. "Concentrations in EIffluents to Unrestricted Areas." generally provides that structural integrity. Several analytical methods are available that may be used to determine the stability of licensees shall not possess. use. or transfer licensed material s) as to release to anl unrestricted area emnbankments for various heights and slopes. seepage radioactive material in concentrations which exceed the conditions, and soil strengtl" parameters. The results of such stability analyses should demonstrate an acceptable limits. spccified in Appendix B. Tablc II of Part 20.

factor of safety against failure for all pertinent design conditions.

The milling ol' uranium ore results in the production of large volu nues of liquid and solid wastes. (tailings) both of which usually contain concentrations of radioactive

C. REGULATORY POSITION

material in excess of those specified in Table .11, Appendix B of Part 20. It is therefore necessary to I. Basic Design Considerations confic such liquid and solid tailings and prevent their Embankment retention systems for uranium mill release to the environment. Conflnement is usually tailings should be designed to assure structural integrity acconmplished by the construction of an embankment during the intended lifetime of the system. The stability of retention system. This regulator), guide specifies an embankment retention syslemn should be evaluated acceptable methods of analyzing the stability of for construction and operating conditions utilizing the embankments. minimum acceptable safety factors that expected in situ engineering properties of the foundation are applicable during construction and use of and embankment materials and pertinent geologic embankment retention systems, and acceptable information.

surveillance procedures.

2. Methods of Stability Analysis The acceptable methods of analyzing tihe stability of

B. DISCUSSION

embanknients are the adaptations of lte circular arc method. Other proven methods of analyzing stability.

'The design, construction. and size of embankment such as the sliding wedge method. may be used if they retention systems for uranium mill tailings will vary are more applicable to the particular situation being significantly from one milling location to another. The considered.

characteristics of these systems will depend on such diverse factors as the capacity of the mill. the type of 3. Design Conditions for Analysis ore processed. the amount of waste produced. the Stability analyses of embankments should be amount of solution impounded, the type of milling l.performed for the following design conditions:

process, the topography of the area in which thle mill is a. End of Construction (upstream and located, the amount of land thai is available for the downstream slopes):

USAEC REGULATORY GUIDES Copies of published guides may be obtained by request indicating the divisions desired to the US. Atomic Energy Commission. Washligton. DC. 20545.

Reg*.;ory Guides are Issued to describe and make available to the public Attentson: Diretior of Regulatory Standards. Comments and suggetions lot methods acceptable to the AEC Regulatory staff of implementing specific paris of imrtovements in thema guides ere encouraged and should be sent to the Secretary the Commission's regulations, to delineate techniques used by the staff in of the Commlision. U.S. Atomic Energy Commission. Washington. D.C. 20545.

ovaluating specific ptoblems or postulated accidents, or to provide guidance to Attention: ChlefPublic Proceedings Steff.

applicents. Regulatory Guides are not substitutes for regulations and compliance with them Is not required. Methods and solutions different from those SetOut in The guides Areitsued in the following ten broad divitions:

the guides will be acceptable If they provide a basis for the findings requitite to the issuance or continuance of a or license by the Commistsion.

oermit 1. Power Reactors 8. Products permt by2. Research and Trest Reactors 7. T'ransportation

3. Fuels and Matefiets Facilities 8. Occupational Health Published guides will be revised periodically. as appropriate. to accommodate 4. Environmental and Siting 9. Antitrust Review comments and to reflect new Information or eipetlence. 5. Materials and Plant Protection iO. General

c. NI.IirI mltII So Poo llIi. I lIi)J1C

(tSIICJ21II SSurveillance~

A rqgllnIar p oarOf !11 SiL-ilvulanICC Mind II1,0110na,1CC

sh ould hl' es i abNi si d it) deleCci and repair dam age resnIi~l1~tl Ioitim Cilviroimneiii al or othlier ciCCI which nmnlniil lend to lessen life i lllgrilv ol' tlre cinhankinewn

4. Minimum Factoi s of &&fe1y relent ii))) msleiCII. (;enerallx. Visuial il)SpcCI1ions ()I1 a jeciular liasi ;liC acceplabIC mnless circumllstanIces indicate lO~ IlLIS

SpC~h'Ii in IC, klo\0) pojlis Ilii C*.2. olherw~isC. R~epair oii damage rcit)loig froini anyl cause

'Iiou'ld ~ t aCC pt anII'i.IdC aicl

C t)I it' -,.It-e %klidlic icli.!l leind it. ICsseI file iliuL!erit\' ol tIle

.i1-1:iI1sl IjIilhCl fit' ll ; IIII IiincrI L10 11-1110011dilliillS. emlaik)inewlL'l icIeiiI ) S\vsIcili shoiliid lie perl'Orned ais NI:ICu CI'

110)1abC ld oi~ ii sl C I arle 2.i\tCll ill I Ic N0011 :ipssil Iii.\h illiiC11iidtii. PCI(lijfurct It'm ii1(lllimuiullg tile L. *siyi Cond m ,L .0initrim F,1001; Ofl SaLei ad

'ol.dISii', s:1CI

I it, :eC Cmbanlkluiiei, TheC bImic Iiis-11liml)Clit l)ect~ictIli['Mh ,llit)Illilm iljwiL ale pic/ol)1cle)

IEnd ol" onsC * Iti..n ........................... 4.. I' in C1siilu 11clvalct ) p ;Siire n si~loNipeilndicalll s Pa:irtial I' l .............................. I..

Mlaxiimuui r...I...Pool .i...................I Cii'ik ilhIk Ile11S. T Ife C \ ICellI to  %\winch Stich I;rd .tltliak' ( I'* Al l tl' l .ll), v,. il~ttul~entaiti ieed lit iitatlld w\ill lie evalumaed b1%

cbnditions wvill; s.ismi. loadings)I.. . ......... I.I) tilt: 0 1m gsii 10)I.SI

Il ill) ;Iis 1 basis.

SelIection) of tlie aipph))ia~le %eismilc c'CI¢jciein shuild bl baLsed (Ill t he ;Iiaxinllit caiillkill-Ak LhCice.illit.i on he bisis ol liso;ic

1.I

1-2


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