Tokamak Cooling Water System ORNL US ITER Project Tokamak Cooling Water System Presented to ITER...

Tokamak Cooling Water System ORNL

US ITER Project

Tokamak Cooling Water System

Presented toITER PROJECT

1st INFORMATION FORUM

Kirby Wilcher

Cooling Water Systems Engineer

November 15, 2006

Tokamak Cooling Water System ORNL2

Tokamak Cooling Water System Team

Jan Berry

WBS Manager

Karen McElhaney

System Engineer

Kirby Wilcher

System Engineer

Robyn Rose

Project Controls

Jan Berry

WBS Manager


Cooling Water System

• Scope based on 2001 Design • CWS Consists of 4 Systems

– Tokamak Cooling Water System (TCWS)– Component Cooling Water System (CCWS)– Chilled Water System (CHWS)– Heat Rejection System (HRS)


US Scope

Physical Boundary of TCWS


Tokamak Cooling Water System

• TCWS Consists of 7 Sub-systems– Primary Heat Transfer System (PHTS)

Primary First Wall & Blanket (PFW/BLK) Diverter/Limiter (DIV/LIM) Vacuum Vessel (VV) Neutral Beam Injector (NB)

– Chemical and Volume Control System (CVCS)– Drain and Refilling Systems– Drying System


Primary Heat Transfer from In-Vessel Components Fabricated by Sub-System

• First Wall & Blanket (WBS1.2.1.1) and Neutral Beam Injector (WBS1.2.1.4):– Upper Pipe Chase– Vault

• Diverter/Limiter (WBS1.2.1.2):– Lower Pipe Chase– Upper Pipe Chase– Vault

• Vacuum Vessel (WBS1.2.1.3):– Lower Pipe Chase– Upper Pipe Chase– Roof

PHTS


1 GW Heat Removal Required by PHTS; Various Operating Modes

Primary Heat Transfer System (PHTS)

Operating Mode Conditions

1.2.1.1 First Wall and Blanket • Pulse: Thermal load (MW) Inlet temperature (°C)Inlet Pressure (MPa)

• Baking: Inlet temperature (°C) Inlet Pressure (MPa)

~ 690 100 (212oF)3.0 (435 psi)240 (464oF)4.4 (638 psi)

1.2.1.2 Diverter and Limiter • Pulse: Thermal load (MW) Inlet temperature (°C)Inlet Pressure (MPa)


202 100 (212oF)4.2 (609 psi)240 (464oF)4.4 (638 psi)

1.2.1.3 Vacuum Vessel • Pulse: Thermal load (MW) Inlet temperature (°C)Inlet Pressure (MPa)


• Decay heat removal: Heat load to Vacuum Vessel (MW)

10 100 (212oF)1.8 (261 psi)200 (392oF)2.4 (348 psi)

0.8 (peak)

1.2.1.4 Neutral Beam Injector • Low voltage: Thermal load (MW) Inlet temperature (°C)• High voltage: Thermal load (MW) Inlet temperature (°C)

100<80 (176oF)

1230 (86oF)


Chemical and Volume Control System;PFW/BLK


Chemical and Volume Control System;Various Operating Modes

Operational state or modePlasma Operation

StateBaking

Decontamination Mode

Volumetric Flow Rate (at inlet) 45 m3/h (198 gpm) 45 m3/h (198 gpm) 90 m3/h (396 gpm)

Feed Coolant Temp. 148°C (298oF) 240°C (464oF) 100°C (212oF)

Return Coolant Temp. 120°C (248oF) 190°C (374oF) 83°C (181oF)

Feed Coolant Pressure 1.7 MPa (247 psi) 4.3 MPa (624 psi) 1.7 MPa (247 psi)

Return Coolant Pressure 3.4 MPa (493 psi) 4.6 MPa (667 psi) 3.4 MPa (493 psi)


Drain and Refilling Systems;DIV/LIM


Drain and Refilling Systems; Various Operating Modes

System Number of drain tanks* Total internal volume (m3)

PFW/BLK PHTS 2 (1) ~ 500 (~132,000 gal)

DIV/LIM PHTS 2 (1) ~ 200 (~52,800 gal)

VV PHTS 2 ~ 120 (~31,700 gal)

NB injectors PHTS 2 (2) ~ 120 (~31,700 gal)*number of tanks in parentheses indicates those used for drainage following an in-vessel coolant leak


Drying System


Drying System; Various Operating Modes

Blow-out mode Heat-up mode Dry-out mode

Fluid Nitrogen Nitrogen Nitrogen + H2O (steam)

Fluid Inlet Temp. 40°C (104°F) 210°C (410°F) 210°C (410°F)

Fluid Outlet Temp. 40°C (104°F) 160°C (320°F) 160°C (320°F)

Fluid Inlet Pressure 4.0 MPa (580 psi) 2.1 MPa (305 psi) 0.6 MPa (87 psi)


New Cost Share Agreement SimplifiesInterfaces with Participant Teams

• Initial cost share agreement divided responsibility by location (inside vault/outside vault)

• New agreement divides responsibility by activity:– US no longer responsible for installation– US responsible for materials, components, and shipping

Increases US responsibility for fabrication Pre-fabrication reduces overall ITER cost

– IO responsible for engineering, on-site assembly and testing US ITER is contributing engineering


Seven Sub-Systems Distributed Throughout Tokamak Building

Primary Heat Transfer:• Vault• Upper Pipe Chase• Roof• Lower Pipe Chase

Support Systems:• Draining and Refilling

(WBS1.2.1.6)

• Chemical and Volume Control System (WBS1.2.1.5)

• Drying (WBS1.2.1.7)


Requirements Under Review

• Vendors Must Be Able to Comply with US and EU Codes & Standards– American Society of Mechanical Engineers Standards– Pressure Equipment Directive (European Union Directive)– ESPN (French Order on Nuclear Pressure Equipment)

• Nuclear vs. Non-nuclear Classification of TCWS Components to be Determined by ITER and French Regulatory Authorities

• Applicable Codes & Standards Still Under Review• Materials of Construction:

– 304L/316L Stainless Steel


Component Delivery by 2014

Deliverable Estimated Schedule Final DeliverySkids/Components for ITER-IO Approval Date

Stainless Steel Piping 18,450 meters Apr-07 Deliver to Fabricators

Design and Title III October 2007 March 2014

Lower Pipe Chase 10 December 2008-February 2009 June 2010

Upper Pipe Chase 30 May-July 2011 December 2013

Vault 25 May-July 2011 December 2013

Roof 10 May-July 2011 December 2013

WBS 1.2.1.5 30 October-December 2010 May 2013Chemical & Volume Control System

WBS 1.2.1.6 20 February-April 2009 June 2010Draining and Refilling System

WBS 1.2.1.7 10 November 2010-January 2011 October 2014Drying System

Estimated Number of Skids/Components 135


Additional Information

Additional information available at:• General Information

www.iter.org

• ITER Technical Basis

http://www.iter.org/a/index_use_5.htm

Tokamak Cooling Water System ORNL

US ITER Project

Backup Information

Detailed Preliminary Schedule and Milestones


Preliminary Schedule


Preliminary Schedule (Cont.)


Systems Integration Preliminary Schedule and Milestones


First Wall and Blanket Preliminary Schedule and Milestones


Divertor/Limiter Preliminary Schedule and Milestones


Vacuum Vessel Preliminary Schedule and Milestones


Neutral Beam Injector Preliminary Schedule and Milestones


Chemical and Volume Control System—May 2013


Draining and Refilling Schedule—June 2010


Drying System Schedule—October 2013

Tokamak Cooling Water System ORNL US ITER Project Tokamak Cooling Water System Presented to ITER...

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