TMI-2 Reactor Coolant System Criticality Analyses

Conference · Sun Jun 15 04:00:00 EDT 1986 · Transactions of the American Nuclear Society

OSTI ID:6665290

Westfall, R. M. ^[1]; Parks, C. V. ^[1]

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1. Martin Marietta Energy Systems, Inc., Oak Ridge, TN (United States)

Recent work at Oak Ridge National Laboratory has focused on criticality assessments of configurations pertinent to the Three Mile Island Unit 2 (TMI-2) defueling. The TMI-2 Criticality Task force has adopted a bounding approach in defining a concentration of soluble boron that would maintain the core in a shutdown condition for all fuel removal operations. The analytical models and procedures employed in the design-basis study for establishing this limiting boron concentration were recently reported. This summary reports extensions to the design-basis study in two areas: (a) consideration of fuel particle sizes larger than the original UO₂ pellet and (b) introduction of various foreign materials into the fuel rubble during defueling operations.

• Research Organization: Martin Marietta Energy Systems, Inc., Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA), Nuclear Criticality Safety Program (NCSP)
• OSTI ID: 6665290
• Report Number(s): CONF-860610-
• Conference Information: Journal Name: Transactions of the American Nuclear Society Journal Volume: 52
• Country of Publication: United States
• Language: English

Related Subjects

11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
210200 -- Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled
22 GENERAL STUDIES OF NUCLEAR REACTORS
220900* -- Nuclear Reactor Technology-- Reactor Safety
ACCIDENTS
ACTINIDE COMPOUNDS
BORON
CHALCOGENIDES
COMPUTER CODES
CONTAINERS
COOLING SYSTEMS
CORIUM
CRITICALITY
CROSS SECTIONS
DEMOLITION
ELEMENTS
ENERGY SYSTEMS
ENRICHED URANIUM REACTORS
MODERATORS
NATIONAL ORGANIZATIONS
Nuclear Criticality Safety Program (NCSP)
ORNL
OXIDES
OXYGEN COMPOUNDS
POWER REACTORS
PWR TYPE REACTORS
QUANTITY RATIO
REACTOR ACCIDENTS
REACTOR COMPONENTS
REACTOR COOLING SYSTEMS
REACTOR CORE DISRUPTION
REACTOR DISMANTLING
REACTORS
REMOVAL
S CODES
SEMIMETALS
STORAGE
THERMAL REACTORS
THREE MILE ISLAND-2 REACTOR
Three Mile Island Unit 2 (TMI-2) defueling
URANIUM COMPOUNDS
URANIUM DIOXIDE
URANIUM OXIDES
US AEC
US DOE
US ERDA
US ORGANIZATIONS
WATER COOLED REACTORS
WATER MODERATED REACTORS