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Plasma-Arc Cutting Equipment for TMI-2 Defueling

Conference · · Transactions of the American Nuclear Society
OSTI ID:5653679
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An engineering effort is currently under way at Three Mile Island Unit 2 (TMI-2) to provide equipment to defuel the region of the reactor vessel below the core. This area is a stainless-steel structure called the lower core support assembly (LCSA). As one of several options, the plasma-arc cutting process has been selected to section the LCSA to provide large openings for debris removal from this region. Plasma arc is the only technique considered to be capable of cutting the LCSA in a reasonable time. Remote, underwater plasma cutting has been used previously for decommissioning and for modifications at operating reactors, such as St. Lucie. Cutting tests at a depth of 10.7 m (35 ft) on 5-cm (2-in.)-thick stainless steel established the feasibility of the TMI-2 application.

Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA), Nuclear Criticality Safety Program (NCSP)
OSTI ID:
5653679
Report Number(s):
CONF-870601-
Journal Information:
Transactions of the American Nuclear Society, Journal Name: Transactions of the American Nuclear Society Vol. 54; ISSN TANSA; ISSN 0003-018X
Publisher:
American Nuclear Society
Country of Publication:
United States
Language:
English

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Conference · Wed Dec 31 23:00:00 EST 1986 · Trans. Am. Nucl. Soc.; (United States) · OSTI ID:6778137
Robotic delivery system for plasma cutting of the TMI-2 (Three Mile Island Unit 2) lower core support assembly
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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
CONTAINERS
CORIUM
CRITICALITY
CUTTING TOOLS
DEMOLITION
Debris Removal
ENRICHED URANIUM REACTORS
FUEL ASSEMBLIES
Lower Core Support Assembly (LCSA)
MECHANICAL STRUCTURES
MODIFICATIONS
NATIONAL ORGANIZATIONS
Nuclear Criticality Safety Program (NCSP)
PERFORMANCE
POWER REACTORS
PRESSURE VESSELS
PWR TYPE REACTORS
REACTOR ACCIDENTS
REACTOR COMPONENTS
REACTOR CORES
REACTOR DISMANTLING
REACTORS
SAFETY
SUPPORTS
THERMAL REACTORS
THREE MILE ISLAND-2 REACTOR
TOOLS
US DOE
US ORGANIZATIONS
WATER COOLED REACTORS
WATER MODERATED REACTORS