Document: NUREG-0800
Document ID: e1fb2732-c7c9-4bbf-99dc-ee2469f9ed6f
Document Type: srp
Title: - 12.4  RADIATION PROTECTION DESIGN FEATURES
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070617.pdf
Revision Date: 2023-06
Chapter: 12
Section ID: 12.3
CFR Part: 
CFR Title: 

Content:
iption file of the Radiation Shielding Information Center at Oak Ridge National Laboratory, which means that they have been tested and authenticated for operation but not for reliability and accuracy. RABPERB has a few codes in-house for use in shielding calculations. These are SDC, a kernel 61 integration shield design code; G , a general purpose gamma ray scattering program; various 3 versions of QAD and MORSE, a general purpose Monte Carlo multigroup neutron and gamma ray transport code, etc. SDC can calculate gamma ray shielding requirements, handling 12 source geometries (including point, line, disk, plane, slab, and sphere) and with cross sections and material compositions for 17 materials. As many as 12 gamma energy groups, covering the range from 0.1 to 10 MeV, may be used to describe the gamma spectrum. The staff may use these codes, as necessary, to calculate dose rates for given shield designs and source strengths, as a confirmation of the applicant's method. The applicant's shielding design is acceptable if the methods are comparable to commonly acceptable shielding calculations and if assumptions regarding source terms, cross sections, shield and source geometries, and transport methods are realistic. Acceptable shielding codes include but are not limited to ANISN, QAD, DOT, MORSE, SAM-CE, 05R, 06R, G , SDC, and 3 many others. This listing does not imply that all these codes are equivalent, since some are much more sophisticated than others. The staff believes it is advantageous to use a good DRAFT Rev. 3 - April 1996 12.3-10 calculational procedure, since an effective shield design is essential to meeting the criteria that occupational radiation exposures will be as low as is reasonably achievable. Two documents provide additional guidance for acceptability of the shielding design. One is "Reactor Shielding for Nuclear Engineers," edited by N. M. Schaeffer, published by AEC-OIS, 1973." The second is the Stone & Webster Engineering Corporation topical