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Why Is Full Remote Handling an Area of Unfilled DEMO R&D Gap? Tom Burgess for NCT Discussion Group. What Is Full Remote Handling, required by Demo?

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slide1

Why Is Full Remote Handling an Area of Unfilled DEMO R&D Gap?

Tom Burgess for NCT Discussion Group

  • What Is Full Remote Handling, required by Demo?
  • Full remote handling uses robotic handling systemssupported bycomponent, device, and facility designs to enable efficient maintenance of all activated components, minimize mean time between failure, and maximize availability
  • What Is the gap in Fusion Full Remote Handling?
  • Exceptionally challenging remote handling environment with competing requirements:
    • Large handling payloads, precise positioning / alignment, high radiation, poor accessibility, complex fusion core components, and tightly constrained spaces.
  • Far beyond available knowledge base (fission, accelerators, fusion, etc.)
  • Contributions from ITER
    • First reactor-size remote handling
    • Severe constraints in design
      • Limited access
      • Many modules in small sizes
      • Lengthy maintenance cycles
      • Low availability
      • major changes in approach anticipated for DEMO
slide2

A NCT Facility Fills this Gap in Unique Ways

  • Envisioned NCT Challenges and Capabilities
  • Must achieve an availability of 30%, an order of magnitude above ITER goal
  • Demo-level high radiation
  • Frequent scheduled and unscheduled component exchanges
  • High degree of component modularization
  • Time and cost effective solutions
  • Vertical Access:CTF Vertical May 31, 2007.avi
  • Mid-plane Access: CTF Midplane May 16, 2007.avi
fission reactor remote handling is simple by comparison
Fission Reactor Remote Handling is Simple by Comparison

Power Reactor Fuel Handling

ORNL High Flux Isotope Reactor Fuel Pool

sns target facility

Spallation Neutron Source Target Facility: A Modern, Accelerator-based Example

SNS Target Facility

Cutaway of Target

Building

sns target process hot cell
SNS Target Process Hot Cell

A US science frontier facility

Size: 103 Ft Long x 14 ft Wide x 30 feet High

sns hot cell interior looking towards target

An inaccessible area where all process systems are fully remotely maintained with state-of-the-art robotic remote handling system

SNS Hot Cell Interior Looking Towards Target
remote handling design development for rare isotope accelerator ria
Remote Handling Design Development for Rare Isotope Accelerator (RIA)
  • ORNL in collaboration with ANL, LLNL and MSU, developed the conceptual design of RIA target stations and facilities
  • Sponsored by DOE Office of Science - Nuclear Physics
  • Accelerates ion beams from hydrogen through uranium at power levels up to 400 kW with primary targets of liquid lithium and water-cooled tungsten
  • RIA R&D and design was completed in 2006. DOE has rescoped and defined as the Facility for Rare Isotope Beams (FRIB), with ~ 5 year delay in construction schedule.
remote handling design development for archimedes filter plant
Remote Handling Design Development for Archimedes Filter Plant

Archimedes Nuclear Waste, LLC, is developing a proprietary process for plasma mass separation of HLW stored at DOE-Hanford

  • Archimedes Filter Plant will reduce HLW mass by 75% to 90%
  • Remote Systems completed tasks:
    • Trade-off Study to evaluate and select the optimum remote handling approach for the multi-filter plant
    • Conceptual Design and Cost Est. of the AFP Remote Handling System and supporting documents

AFP Remote

Handling System

Concept

Design

ctf builds on iter remote maintenance approach

Blanket handling

Upper port handling

Divertor handling

Equatorial port handling

In-vessel viewing system

CTF Builds On ITER Remote Maintenance Approach
  • ITER remote handling (RH) design and experience leveraged and applied
  • Hands-on maintenance employed to the fullest extent possible
  • Activation levels outside vacuum vessel low enough to permit hands-on maintenance

ITER Remote Handling Systems

slide13

Machine

Assembly / Disassembly

Schematic

Centerstack

Assembly

Upper Blanket Assy

Lower Blanket Assy

Upper PF coil

Upper Diverter

Lower Diverter

Lower PF coil

Upper Piping

Electrical Joint

Top Hatch

Shield

Assembly

NBI Liner

Test Modules

  • Disconnect upper piping
  • Remove sliding electrical joint
  • Remove top hatch
  • Remove upper PF coil
  • Remove upper diverter
  • Remove lower diverter
  • Remove lower PF coil
  • Extract NBI liner
  • Extract test modules
  • Remove upper blanket assembly
  • Remove lower blanket assembly
  • Remove shield assembly
  • Remove centerstack assembly
slide14

CTF Vacuum Vessel, Blanket and Port Assembly Shielding Allows Ex-Vessel Hands-on Access

VV, blanket and port shielding (steel & water)

slide15

Activated Components Transferred Between Machine and Service Hot Cell by RH Casks

Midplane Port RH Cask

  • In-vessel components removed as integral assemblies and transferred to hot cell for repair or processing as waste
  • In-vessel contamination controlled and contained by sealed transfer casks that dock to VV ports
  • Remote operations begin with hands-on disassembly and preparation of VV closure plate at midplane port or top vertical port
  • Midplane ports provide access to test blanket modules, heating, and diagnostic systems housed in standard shielded assemblies that are remotely removed

Test Blanket Module

Cask Docking Ports

Hot Cell

top vertical port facilitates large component replacement to minimize maintenance time

To reduce maintenance time / significantly increase machine availability (30 % duty factor), a large in-vessel component module approach with vertical replacement is being investigated.

Top Vertical Port Facilitates Large Component Replacement To Minimize Maintenance Time

remote handling classification of components

Remote maintenance is an important design and interface requirement, particularly for frequently handled items

  • Components are given a classification to guide the level of design optimization for ease and speed of replacement
Remote Handling Classification of Components
component maintenance frequency and time estimate
Component Maintenance Frequency and Time Estimate

* Includes active remote maintenance time only. Actual machine shutdown period will be longer by ~ > 1 month.

Time estimates are rough approximations based on similar operations estimated for ITER and FIRE.

slide19

Port assembly installed

Port assembly removed to cask

TF

PF

Cryostat

Blanket

Port assembly RH tractor

Port bellows

VV

Port assembly and RH cask interface to VV

RH cask

VV port

ITER equatorial port assembly remote handling system

slide20

Port assembly and RH cask interface requires > 50 cm clearance measured from nearest component to inside port opening

60 cm

  • Space drivers:
  • Cask maneuvering clearance
  • Cask enclosure wall
  • Cask-to-port seals
  • & docking clamps (not shown)
  • Double-seal door seals
  • Port assembly seal welds
  • Port assembly attachment keys

Note: Design has been optimized to minimize space, requires R&D to verify, and is subject to increases

60 cm

ITER VV port access clearance requirements

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