Radiological source term into containment under severe accident conditions

Conference · Fri Jan 01 04:00:00 EST 1993 · Transactions of the American Nuclear Society; (United States)

OSTI ID:6960009

Nourbakhsh, H P ^[1]

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1. Brookhaven National Lab., Upton, NY (United States)

The radiological source term into containment used by the U.S. Nuclear Regulatory Commission as the basis for regulatory decisions related to reactor siting and evaluation of important plant performance requirements is derived from the 1962 Atomic Energy Commission report TID-14844. The TID source term, as it is known, postulates the release into containment of 100% of the core inventory of noble gases, 50% of iodines, and 10% of the remaining [open quotes]solid[close quotes] fission products. These values were based largely on experiments performed in the late 1950s involving heated irradiated UO[sub 2], pellets. There has been significant research activity regarding severe accidents following the accident at Three Mile Island unit 2. The objective of the work described in this paper is to utilize the current technical knowledge and understanding of LWR severe accident phenomenology to provide more realistic estimates of source term release into containments in terms of timing, nuclide types, and quantities during a severe core-melt accident.

• OSTI ID: 6960009
• Report Number(s): CONF-931160--
• Conference Information: Journal Name: Transactions of the American Nuclear Society; (United States) Journal Volume: 69
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
210100* -- Power Reactors
Nonbreeding
Light-Water Moderated
Boiling Water Cooled
210200 -- Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled
ACCIDENTS
BWR TYPE REACTORS
CONTAINMENT
ELEMENTS
ENRICHED URANIUM REACTORS
FISSION PRODUCT RELEASE
HALOGENS
IODINE
MATHEMATICAL MODELS
NONMETALS
POWER REACTORS
PWR TYPE REACTORS
RADIONUCLIDE KINETICS
REACTOR ACCIDENTS
REACTOR CORE DISRUPTION
REACTORS
SOURCE TERMS
THERMAL REACTORS
WATER COOLED REACTORS
WATER MODERATED REACTORS