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Title: Topaz II preliminary safety assessment

The Strategic Defense Initiative Organization (SDIO) decided to investigate the possibility of launching a Russian Topaz II space nuclear power system. A preliminary safety assessment was conducted to determine whether or not a space mission could be conducted safely and within budget constraints. As part of this assessment, a safety policy and safety functional requirements were developed to guide both the safety assessment and future Topaz II activities. A review of the Russian flight safety program was conducted and documented. Our preliminary safety assessment included a top level event tree, neutronic analysis of normal and accident configurations, an evaluation of temperature coefficients of reactivity, a reentry and disposal analysis, and analysis of postulated launch abort impact accidents, and an analysis of postulated propellant fire and explosion accidents. Based on the assessment, it appears that it will be possible to safely launch the Topaz II system in the U.S. with some possible system modifications. The principal system modifications will probably include design changes to preclude water flooded criticality and to assure intact reentry.
Authors:
 [1] ;  [2] ;  [3] ;  [4]
  1. (Sandia National Laboratories, Albuquerque, New Mexico 87185 (United States))
  2. (Air Force Phillips Laboratory, Albuquerque, New Mexico 87110 (United States))
  3. (Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States))
  4. (Department of Chemical and Nuclear Engineering Department, Institute for Nuclear Power Studies, University of New Mexico, Albuquerque, New Mexico 87110 (United States))
Publication Date:
OSTI Identifier:
6541429
Report Number(s):
CONF-930103--
Journal ID: ISSN 0094-243X; CODEN: APCPCS
DOE Contract Number:
AC04-76DP00789
Resource Type:
Conference
Resource Relation:
Journal Name: AIP Conference Proceedings (American Institute of Physics); (United States); Journal Volume: 271:1; Conference: 10. symposium on space nuclear power and propulsion, Albuquerque, NM (United States), 10-14 Jan 1993
Country of Publication:
United States
Language:
English
Subject:
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; 22 GENERAL STUDIES OF NUCLEAR REACTORS; TOPAZ REACTOR; SAFETY ANALYSIS; ACCIDENTS; EXPLOSIONS; FIRES; MISSION ANALYSIS; REACTOR CORE DISRUPTION; REENTRY; RISK ASSESSMENT; TEMPERATURE COEFFICIENT; EXPERIMENTAL REACTORS; HYDRIDE MODERATED REACTORS; POWER REACTORS; REACTIVITY COEFFICIENTS; REACTOR ACCIDENTS; REACTORS; RESEARCH AND TEST REACTORS 210600* -- Power Reactors, Auxiliary, Mobile Package, & Transportable; 220900 -- Nuclear Reactor Technology-- Reactor Safety