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{{#Wiki_filter:Z ~ .- r"~ , %- (U.S. NUCLEAR REGULATORY COMMISSIONREGULATORYRevision 1April 1989GUIDEOFFICE OF NUCLEAR REGULATORY RESEARCHREGULATORY GUIDE 3.45(Task CE 802-5)NUCLEAR CRITICALITY SAFETY FOR STEEL-PIPE INTERSECTIONS CONTAININGAQUEOUS SOLUTIONS OF FISSILE MATERIALS
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                                U.S. NUCLEAR REGULATORY COMMISSION                                                                Revision 1 April 1989 REGULATORY GUIDE
                                OFFICE OF NUCLEAR REGULATORY RESEARCH
                                                            REGULATORY GUIDE 3.45 (Task CE 802-5)
                  NUCLEAR CRITICALITY SAFETY FOR STEEL-PIPE INTERSECTIONS CONTAINING
                                          AQUEOUS SOLUTIONS OF FISSILE MATERIALS


==A. INTRODUCTION==
==A. INTRODUCTION==
Section 70.22, "Contents of Applications," of10 CFR Part 70, "Domestic Licensing of Special Nu-clear Material," requires that applications for a spe-cific license to own, acquire, deliver, receive, possess,use, or transfer special nuclear material contain pro-posed procedures to avoid accidental conditions ofcriticality. This regulatory guide provides guidance forcomplying with this portion of the Commission's regu-lations by describing procedures acceptable to theNRC staff for the prevention of criticality accidents inthe storage and processing of aqueous solutions of fis-sile materials in steel-pipe intersections.Any information collection activities mentionedin this regulatory guide are contained as requirementsin 10 CFR Part 70, which provides the regulatory ba-sis for this guide. The information collection require-ments in 10 CFR Part 70 have been cleared underOMB Clearance No. 3150-0009.
by the American National Standards Institute (ANSI)
      Section 70.22, "Contents of Applications," of                          on April 3, 1987.
 
10 CFR Part 70, "Domestic Licensing of Special Nu- ANSI/ANS-8.9-1987 provides specifications for clear Material," requires that applications for a spe- pipe intersections containing homogeneous aqueous cific license to own, acquire, deliver, receive, possess, solutions of fissile materials. All dimensions are inter- use, or transfer special nuclear material contain pro- preted as nominal values of schedule 10 or heavier posed procedures to avoid accidental conditions of standard steel pipe. Only single columns with inter- criticality. This regulatory guide provides guidance for sections are considered in the standard. For multiple complying with this portion of the Commission's regu- columns or columns in the vicinity of other fissile ma- lations by describing procedures acceptable to the terials and the influence of environmental factors, the NRC staff for the prevention of criticality accidents in standard requires that experimental data or validated the storage and processing of aqueous solutions of fis- computational techniques be used to determine the sile materials in steel-pipe intersections.
 
safe configuration. Criteria and data provided are Any information collection activities mentioned                        based on criticality experiments and validated calcu- in this regulatory guide are contained as requirements                      lations that are generally applicable to homogeneous in 10 CFR Part 70, which provides the regulatory ba-                        aqueous solutions of fissile materials. Specific infor- sis for this guide. The information collection require-                      mation is included on fissile solutions containing ura- ments in 10 CFR Part 70 have been cleared under                              nium enriched in the 235U or 233 U isotope or pluto- OMB Clearance No. 3150-0009.                                                nium and on uranium solutions having a 23U content not exceeding 5 weight-percent of the total uranium.


==B. DISCUSSION==
==B. DISCUSSION==
ANSI/ANS-8.9-1987, "Nuclear Criticality SafetyCriteria for Steel-Pipe Intersections Containing Aque-ous Solutions of Fissile Material,"' was prepared bySubcommittee 8, Fissionable Materials Outside Reac-tors, of the Standards Committee of the AmericanNuclear Society. ANSI/ANS 8.9-1987 was approved'Copies may be obtained from the American Nuclear Society,555 N. Kensington Avenue, La Grange Park, IL 60525.by the American National Standards Institute (ANSI)on April 3, 1987.ANSI/ANS-8.9-1987 provides specifications forpipe intersections containing homogeneous aqueoussolutions of fissile materials. All dimensions are inter-preted as nominal values of schedule 10 or heavierstandard steel pipe. Only single columns with inter-sections are considered in the standard. For multiplecolumns or columns in the vicinity of other fissile ma-terials and the influence of environmental factors, thestandard requires that experimental data or validatedcomputational techniques be used to determine thesafe configuration. Criteria and data provided arebased on criticality experiments and validated calcu-lations that are generally applicable to homogeneousaqueous solutions of fissile materials. Specific infor-mation is included on fissile solutions containing ura-nium enriched in the 235U or 233U isotope or pluto-nium and on uranium solutions having a 23U contentnot exceeding 5 weight-percent of the total uranium.
ANSI/ANS-8.9-1987, "Nuclear Criticality Safety                                       


==C. REGULATORY POSITION==
==C. REGULATORY POSITION==
The nuclear criticality safety practices and guid-ance for calculating safe steel-pipe intersections foraqueous solutions of fissile materials contained inANSI/ANS-8.9-1987 provide procedures generallyacceptable to the NRC staff for the prevention ofcriticality accidents in the storage and processing ofaqueous solutions of fissile materials.USNRC REGUIATORY GUIDESRegulatory Guides are Issued to describe and make available to the pub-lic methods acceptable to the NRC staff of implementing specific partsof the Commission's regulations, to delineate techniques used by thestaff in evaluating specific problems or postulated accidents, or to pro-vide guidance to applicants. Regulatory Guides are not substitutes forregulations, and compliance with them is not required. Methods andsolutions different from those set out in the guides will be acceptable ifthey provide a basis for the findings requisite to the Issuance or continu-ance of a permit or license by the Commission.This guide was issued after consideration of comments received fromthe public. Comments and suggestions for improvements in theseguides are encouraged at all times, and guides will be revised, as ap-propriate, to accommodate comments and to reflect new information orexperience.Written comments may be submitted to the Regulatory PublicationsBranch, DFIPS, ARM, U.S. Nuclear Regulatory Commission, Washing-ton, DC 20555.The guides are Issued in the following ten broad divisions:1. Power Reactors2. Research and Test Reactors3. Fuels and Materials Facilities4. Environmental and Siting5. Materials and Plant Protection6. Products7. Transportation8. Occupational Health9. Antitrust and Financial Review10. GeneralCopies of issued guides may be purchased from the Government PrintingOffice at the current GPO price. Information on current GPO prices maybe obtained by contacting the Superintendent of Documents, U.S.Government Printing Office, Post Office Box 37082, Washington, DC20013-70B2, telephone (202)275-2060 or (202)275-2171.Issued guides may also be purchased from the National Technical Infor-mation Service on a standing order basis. Details on this service may beobtained by writing NTIS, 5285 Port Royal Road, Springfield, VA 2216
Criteria for Steel-Pipe Intersections Containing Aque- ous Solutions of Fissile Material,"' was prepared by                              The nuclear criticality safety practices and guid- Subcommittee 8, Fissionable Materials Outside Reac-                          ance for calculating safe steel-pipe intersections for tors, of the Standards Committee of the American                            aqueous solutions of fissile materials contained in Nuclear Society. ANSI/ANS 8.9-1987 was approved                              ANSI/ANS-8.9-1987 provide procedures generally acceptable to the NRC staff for the prevention of
  'Copies may be obtained from the American Nuclear Society,                criticality accidents in the storage and processing of
555 N. Kensington Avenue, La Grange Park, IL 60525.                          aqueous solutions of fissile materials.
 
USNRC REGUIATORY GUIDES                              The guides are Issued in the following ten broad divisions:
Regulatory Guides are Issued to describe and make available to the pub- lic methods acceptable to the NRC staff of implementing specific parts of the Commission's regulations, to delineate techniques used by the        1. Power Reactors                    6. Products staff in evaluating specific problems or postulated accidents, or to pro-   2. Research and Test Reactors        7. Transportation vide guidance to applicants. Regulatory Guides are not substitutes for      3. Fuels and Materials Facilities    8. Occupational Health regulations, and compliance with them is not required. Methods and          4. Environmental and Siting          9. Antitrust and Financial Review solutions different from those set out in the guides will be acceptable if  5. Materials and Plant Protection    10. General they provide a basis for the findings requisite to the Issuance or continu- ance of a permit or license by the Commission.
 
Copies of issued guides may be purchased from the Government Printing This guide was issued after consideration of comments received from         Office at the current GPO price. Information on current GPO prices may the public. Comments and suggestions for improvements in these              be obtained by contacting the Superintendent of Documents, U.S.
 
guides are encouraged at all times, and guides will be revised, as ap-      Government Printing Office, Post Office Box 37082, Washington, DC
propriate, to accommodate comments and to reflect new information or        20013-70B2, telephone (202)275-2060 or (202)275-2171.
 
experience.
 
Written comments may be submitted to the Regulatory Publications            Issued guides may also be purchased from the National Technical Infor- Branch, DFIPS, ARM, U.S. Nuclear Regulatory Commission, Washing-            mation Service on a standing order basis. Details on this service may be ton, DC 20555.                                                              obtained by writing NTIS, 5285 Port Royal Road, Springfield, VA 22161.


==D. IMPLEMENTATION==
==D. IMPLEMENTATION==
The purpose of this section is to provide informa-tion to applicants regarding the NRC staff's plan forusing this regulatory guide.These methods reflect the latest general NRC ap-proach to criticality safety in the storage and process-ing of aqueous solutions of fissile materials in steel-pipe intersections. Therefore, except in those cases inwhich the applicant proposes an acceptable alterna-tive method for complying with the specified portionsof the Commission's regulations, the method de-scribed here will be used in the evaluation of submit-tals for license applications submitted pursuant to10 CFR Part 70.3.45-2 VALUE/IMPACT STATEMENTA draft value/impact statement was publishedwith the proposed Revision 1 to Regulatory Guide3.45 (Task CE 802-5) when the draft guide was pub-lished for public comment in May 1988. No changeswere necessary, so a separate value/impact statementfor the final guide has not been prepared. A copy ofthe draft value/impact statement is available for in-spection and copying for a fee at the Commission'sPublic Document Room at 2120 L Street NW., Wash-ington, DC, under Task CE 802-5.3.45-3 UNITED STATESNUCLEAR REGULATORY COMMISSIONWASHINGTON, D.C. 20555FIRST CLASS MAILPOSTAGE b FEES PAIDUSNRCPERMIT No. G,67OFFICIAL BUSINESSPENALTY FOR PRIVATE USE, $300}}
pipe intersections. Therefore, except in those cases in The purpose of this section is to provide informa-        which the applicant proposes an acceptable alterna- tion to applicants regarding the NRC staff's plan for        tive method for complying with the specified portions using this regulatory guide.                                  of the Commission's regulations, the method de- These methods reflect the latest general NRC ap-          scribed here will be used in the evaluation of submit- proach to criticality safety in the storage and process-      tals for license applications submitted pursuant to ing of aqueous solutions of fissile materials in steel-      10 CFR Part 70.
 
3.45-2
 
VALUE/IMPACT STATEMENT
    A draft value/impact statement was published        for the final guide has not been prepared. A copy of with the proposed Revision 1 to Regulatory Guide          the draft value/impact statement is available for in-
3.45 (Task CE 802-5) when the draft guide was pub-       spection and copying for a fee at the Commission's lished for public comment in May 1988. No changes        Public Document Room at 2120 L Street NW., Wash- were necessary, so a separate value/impact statement      ington, DC, under Task CE 802-5.
 
3.45-3
 
UNITED STATES              FIRST CLASS MAIL
NUCLEAR REGULATORY COMMISSION      POSTAGE b FEES PAID
                                          USNRC
    WASHINGTON, D.C. 20555 PERMIT No. G,67 OFFICIAL BUSINESS
    PENALTY FOR PRIVATE USE, $300}}


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Latest revision as of 00:13, 12 November 2019

Nuclear Criticality Safety for Steel-Pipe Intersections Containing Aqueous Solutions of Fissile Materials
ML122430316
Person / Time
Issue date: 04/30/1989
From:
Office of Nuclear Regulatory Research
To:
References
CE 802-5 RG 3.45, Rev. 1
Download: ML122430316 (4)


r"~

Z ~, .-  %- (

U.S. NUCLEAR REGULATORY COMMISSION Revision 1 April 1989 REGULATORY GUIDE

OFFICE OF NUCLEAR REGULATORY RESEARCH

REGULATORY GUIDE 3.45 (Task CE 802-5)

NUCLEAR CRITICALITY SAFETY FOR STEEL-PIPE INTERSECTIONS CONTAINING

AQUEOUS SOLUTIONS OF FISSILE MATERIALS

A. INTRODUCTION

by the American National Standards Institute (ANSI)

Section 70.22, "Contents of Applications," of on April 3, 1987.

10 CFR Part 70, "Domestic Licensing of Special Nu- ANSI/ANS-8.9-1987 provides specifications for clear Material," requires that applications for a spe- pipe intersections containing homogeneous aqueous cific license to own, acquire, deliver, receive, possess, solutions of fissile materials. All dimensions are inter- use, or transfer special nuclear material contain pro- preted as nominal values of schedule 10 or heavier posed procedures to avoid accidental conditions of standard steel pipe. Only single columns with inter- criticality. This regulatory guide provides guidance for sections are considered in the standard. For multiple complying with this portion of the Commission's regu- columns or columns in the vicinity of other fissile ma- lations by describing procedures acceptable to the terials and the influence of environmental factors, the NRC staff for the prevention of criticality accidents in standard requires that experimental data or validated the storage and processing of aqueous solutions of fis- computational techniques be used to determine the sile materials in steel-pipe intersections.

safe configuration. Criteria and data provided are Any information collection activities mentioned based on criticality experiments and validated calcu- in this regulatory guide are contained as requirements lations that are generally applicable to homogeneous in 10 CFR Part 70, which provides the regulatory ba- aqueous solutions of fissile materials. Specific infor- sis for this guide. The information collection require- mation is included on fissile solutions containing ura- ments in 10 CFR Part 70 have been cleared under nium enriched in the 235U or 233 U isotope or pluto- OMB Clearance No. 3150-0009. nium and on uranium solutions having a 23U content not exceeding 5 weight-percent of the total uranium.

B. DISCUSSION

ANSI/ANS-8.9-1987, "Nuclear Criticality Safety

C. REGULATORY POSITION

Criteria for Steel-Pipe Intersections Containing Aque- ous Solutions of Fissile Material,"' was prepared by The nuclear criticality safety practices and guid- Subcommittee 8, Fissionable Materials Outside Reac- ance for calculating safe steel-pipe intersections for tors, of the Standards Committee of the American aqueous solutions of fissile materials contained in Nuclear Society. ANSI/ANS 8.9-1987 was approved ANSI/ANS-8.9-1987 provide procedures generally acceptable to the NRC staff for the prevention of

'Copies may be obtained from the American Nuclear Society, criticality accidents in the storage and processing of

555 N. Kensington Avenue, La Grange Park, IL 60525. aqueous solutions of fissile materials.

USNRC REGUIATORY GUIDES The guides are Issued in the following ten broad divisions:

Regulatory Guides are Issued to describe and make available to the pub- lic methods acceptable to the NRC staff of implementing specific parts of the Commission's regulations, to delineate techniques used by the 1. Power Reactors 6. Products staff in evaluating specific problems or postulated accidents, or to pro- 2. Research and Test Reactors 7. Transportation vide guidance to applicants. Regulatory Guides are not substitutes for 3. Fuels and Materials Facilities 8. Occupational Health regulations, and compliance with them is not required. Methods and 4. Environmental and Siting 9. Antitrust and Financial Review solutions different from those set out in the guides will be acceptable if 5. Materials and Plant Protection 10. General they provide a basis for the findings requisite to the Issuance or continu- ance of a permit or license by the Commission.

Copies of issued guides may be purchased from the Government Printing This guide was issued after consideration of comments received from Office at the current GPO price. Information on current GPO prices may the public. Comments and suggestions for improvements in these be obtained by contacting the Superintendent of Documents, U.S.

guides are encouraged at all times, and guides will be revised, as ap- Government Printing Office, Post Office Box 37082, Washington, DC

propriate, to accommodate comments and to reflect new information or 20013-70B2, telephone (202)275-2060 or (202)275-2171.

experience.

Written comments may be submitted to the Regulatory Publications Issued guides may also be purchased from the National Technical Infor- Branch, DFIPS, ARM, U.S. Nuclear Regulatory Commission, Washing- mation Service on a standing order basis. Details on this service may be ton, DC 20555. obtained by writing NTIS, 5285 Port Royal Road, Springfield, VA 22161.

D. IMPLEMENTATION

pipe intersections. Therefore, except in those cases in The purpose of this section is to provide informa- which the applicant proposes an acceptable alterna- tion to applicants regarding the NRC staff's plan for tive method for complying with the specified portions using this regulatory guide. of the Commission's regulations, the method de- These methods reflect the latest general NRC ap- scribed here will be used in the evaluation of submit- proach to criticality safety in the storage and process- tals for license applications submitted pursuant to ing of aqueous solutions of fissile materials in steel- 10 CFR Part 70.

3.45-2

VALUE/IMPACT STATEMENT

A draft value/impact statement was published for the final guide has not been prepared. A copy of with the proposed Revision 1 to Regulatory Guide the draft value/impact statement is available for in-

3.45 (Task CE 802-5) when the draft guide was pub- spection and copying for a fee at the Commission's lished for public comment in May 1988. No changes Public Document Room at 2120 L Street NW., Wash- were necessary, so a separate value/impact statement ington, DC, under Task CE 802-5.

3.45-3

UNITED STATES FIRST CLASS MAIL

NUCLEAR REGULATORY COMMISSION POSTAGE b FEES PAID

USNRC

WASHINGTON, D.C. 20555 PERMIT No. G,67 OFFICIAL BUSINESS

PENALTY FOR PRIVATE USE, $300