ML20247F364

Rev 1 to Reg Guide 3.45,Task CE 802-5, Nuclear Criticality Safety for Steel-Pipe Intersections Containing Aqueous Solutions of Fissile Matls

ML20247F364
Person / Time
Issue date:	04/30/1989
From:	NRC OFFICE OF NUCLEAR REGULATORY RESEARCH (RES)
To:
References
TASK-CE-802-5, TASK-RE REGGD-03.045, REGGD-3.045, NUDOCS 8907270134
Download: ML20247F364 (3)

Text

U.S. NUCLEAR REGULATORY COMMISSION R: vision 1

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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 " #E'II 3' I907' 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-cific license to own, acquire, deliver, receive, possess, pipe intersections containing homogeneous aqueous use, or transfe special nuclear meterial contain pro- solutions of fissile materials. All dimensions are inter-posed procedures to avoid accidental conditions of preted as nominal values of schedule 10 or heavier criticality. This regulatory guide provides guidance for standard steel pipe. O,nly single columns with inter-complying with this portion of the Commission s regu-sections are considered in the standard. For multiple columns or columns in the vicinity of other fissile ma-lations by describing procedures acceptable to the terial.s and the influence of environmental factors, the NRC staff for the prevention of criticality accidents in the storage and processing of aqueous solutions of fis-standard requires that experimental data or validated ule matenals in steel-pipe intersections, computational techniques be used to determine the safe configuration. Criteria and data provided are Any information collection activities mentioned based on criticality experiments and validated calcu-(O ^/ in this regulatory guide are contained as requirements in 10 CFR Part 70, which provides the regulatory ba-lations that are generally applicable to homogeneous 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 23sU or 233U isotope or pluto-OMB Clearance No. 3150-0009. nium and on uranium solutions having a 2350 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,"1 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 / nserican 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 REoVLAtoRY oUIDEs 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 tt,a NRc staff of implementing specifsc parts of the Commission's regulations, to delineate techniques used by the 1 Power Reactors 6. Products staff ir, evaluating specific problems or postulated accidents. or to pro- 2 Research and Test Reactors 7. Transportation l

wide guidance to apphcants. Regulatory Guides are not substitutes for 3, Fuels and Materials Facihties 8. occupational Health regulations, and compliance with them is not required. Methods and 4. Environmental and Siting 9. Antitrust and Financial Rev6ew solutions different from those set out in the guides will be acceptable if 6. Materials and Plant Protection 10, General they prov6de a bases for the findings requisite to the issuance or continu-g ance of a permit or heense by the Cornmission.

Copies of issued guides may be purchased from the Government Printing

[g j This guide was issued after consider;ttion of comments feceived from office at the current GPo price. information on current GPo prices may s the public. Comments and suggestions for improvements in these be obtained by contacting the Superintendent of Documents. U.S. i

%/ guides are encouraged at all times, and guides will be revised, es ap.

propriate, to accommodate comments and to reflect new information or Government Printing office, Post Office Box 37082 Washington, Oc 20013-7082, telepharm (202)275-2060 or (202)275-2171.

j experience.

2 Written comments may be submitted to the Regulatory Publications issued guides may also be purchased from the National Technicalinfor-Branch, DFJPS, ARM, U.S. Nuclear Regulatory Commission, Washing- mation Service on a standing order basis. Details on this service may be l j

ton DC 20555. obtained by writing NTIS, 5285 Port Royal Road, Springfield, VA 22161.

8907270134 890430 PDR I

RECCD 1 03.045 R PDR

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l D. IMPLEML'NTATION ' pipe intersections. Therefore, except in those cases in l The purpose of this sections is to provide informa. which the applicant proposes an acceptable alterna i tion to applicants regarding the NRC staff's plan for tive method for complying with the specified portion using this regulatory guide. f of the Commission's regulations, the method de j 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 r.nd process. tais for license applications submitted pursuant to ing of aqueous solutions of fissile materials in steel- 10 CFR Part 70.

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! - n , ';m; - VALUEIIMPACT STATEMENT

,s i 3 l: A draft' value/ impact. statement- was published - for the final guide has not been preparedi A copy of:.

l., with 'the proposed Revision 1 to Regulatory . Guide -

, 'the draft vplue/ impact statement is available for in-H. W, . 3.45 (Task CE 802 5) when the draft gulde was pub- . spection and ' copying for a fee at the Commission's '

l . lished for public comment in May 1988. No changes Public Document Room at 2120 L' Street NW., Wash-jgg were necessary, so a separate value/ impact statement' ington, DC, under Task CE 802-5.

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