Light-Weight Radioisotope Heater Unit Final Safety Analysis Report (LWRHU FSAR): Volume 3, Nuclear Risk Analysis Document

Technical Report · Wed Nov 30 00:00:00 EST 1988

DOI:https://doi.org/10.2172/6533509· OSTI ID:6533509

The Light-Weight Radioisotope Heater Unit (LWRHU) Final Safety Analysis Report (FSAR), Volume 2, Accident Model Document (AMD) describes potential accident scenarios during the Galileo mission and evaluates the response of the LWRHUs to the associated accident environments. Any resulting source terms, consisting of PuO2 (with Pu-238 the dominant radionuclide), are then described in terms of curies released, particle size distribution, release location, and probabilities. This volume (LWRHU-FSAR, Volume 3, Nuclear Risk Analysis Document (NRAD)) contains the radiological analyses which estimate the consequences of the accident scenarios described in the AMD. It also contains the quantification of mission risks resulting from the LWRHUs based on consideration of all accident scenarios and their probabilities. Estimates of source terms and their characteristics derived in the AMD are used as inputs to the analyses in the NRAD. The Failure Abort Sequence Trees (FASTs) presented in the AMD define events for which source terms occur and quantify them. Based on this information, three types of source term cases (most probable, maximum, and expectation) for each mission phase were developed for use in evaluating the radiological consequences and mission risks. 4 refs., 5 figs., 8 tabs.

• Research Organization: EG and G Mound Applied Technologies, Miamisburg, OH (USA); NUS Corp., Gaithersburg, MD (USA)
• DOE Contract Number: AC04-88DP43495; AC01-87NE32134
• OSTI ID: 6533509
• Report Number(s): MLM-3540-Vol.3; NUS-5153; ON: DE89005496
• Resource Relation: Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

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22 GENERAL STUDIES OF NUCLEAR REACTORS
RADIOISOTOPE HEAT SOURCES
RISK ASSESSMENT
SPACE VEHICLE COMPONENTS
REENTRY
ACCIDENTS
ATMOSPHERIC CIRCULATION
F CODES
FLOWSHEETS
ORBITS
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RADIOACTIVITY TRANSPORT
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OXIDES
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TRANSURANIUM COMPOUNDS
VEHICLES
NESDPS Office of Nuclear Energy Space and Defense Power Systems
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