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Title: SSC environmental radiation shielding

The environmental radiation shielding requirements of the SSC have been evaluated using currently available computational tools that incorporate the well known processes of energy loss and degradation of high energy particles into Monte Carlo computer codes. These tools permit determination of isodose contours in the matter surrounding a source point and therefore the specification of minimum thicknesses or extents of shielding in order to assure annual dose equivalents less than some specified design amount. For the general public the annual dose equivalent specified in the design is 10 millirem, small compared to the dose from naturally occurring radiation. The types of radiation fall into two classes for the purposes of shielding determinations-hadrons and muons. The sources of radiation at the SSC of concern for the surrounding environment are the interaction regions, the specially designed beam dumps into which the beams are dumped from time to time, and beam clean-up regions where stops remove the beam halo in order to reduce experimental backgrounds. A final, unlikely source of radiation considered is the accidental loss of the full beam at some point around the ring. Conservative choices of a luminosity of 10{sup 34} cm{sup {minus}2}s{sup {minus}1} and a beam current three timesmore » design have been made in calculating the required shielding and boundaries of the facility. In addition to determination of minimum distances for the annual dose equivalents, the question of possible radioactivity produced in nearby wells or in municipal water supplies is addressed. The designed shielding distances and beam dumps are such that the induced radioactivity in ground water is safely smaller than the levels permitted by EPA and international agencies.« less
Authors:
 [1]
  1. ed.
Publication Date:
OSTI Identifier:
105661
Report Number(s):
SSC-SR--1026
ON: DE95011088
DOE Contract Number:
AC35-89ER40486
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 1 Jul 1987
Research Org:
Lawrence Berkeley Lab., CA (United States). SSC Central Design Group
Sponsoring Org:
USDOE, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; 56 BIOLOGY AND MEDICINE, APPLIED STUDIES; 66 PHYSICS; SUPERCONDUCTING SUPER COLLIDER; SHIELDING; RADIATION DOSES; ENERGY LOSSES; RADIATION PROTECTION; BEAM DUMPS; GROUND WATER