bulk isotope generation project clinton power station

Bulk Isotope Generation ProjectClinton Power Station

NRC Meeting in Rockville, MDMarch 31, 2009

Presentation Layout

Proprietary nature of the project

Background – Non-Proprietary• Bulk Isotope Generation process

• High level description of program

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Lead Test Assembly Program –Non-Proprietary• Specifics on Clinton Power Station activities

Project Details – Proprietary• Competitive technical information

Background Agenda

Exelon / GE-Hitachi Partnership

Cobalt Process Flow

Segmented Cobalt Target Rods

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g g

Irradiation of Cobalt Targets

Transportation

Hot-Cell Work

End Uses of Cobalt-60

Partnership –Exelon & GE-Hitachi

The long-term global production capacity of radioactive isotopes used in nuclear medicine is a very serious concern

GE-Hitachi (GEH) proposed that E l d GEH t i th

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Exelon and GEH partner in the bulk generation of Cobalt-60 Isotope Targets

The irradiated Co-60 targets are used by the medical industry for use in cancer treatments and for irradiation sterilization of foods and medical devices

Cobalt Process Flow

Rods in Fuel Bundles

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Rods Irradiated in Reactor Rods Shipped to CA

Hot Cell HandlingCancer

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Cobalt Target Rods

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1

2 HandlingCancerTreatments

Food Sterilization


Small Cobalt-59 targets are placed in target holding cylinder • Cobalt-59 is a naturally occurring metal

Target holding cylinders are held inside cobalt target rod segments• 2 layers of zirconium cladding

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• 2 layers of zirconium cladding

• Each layer is seal-welded

• Ends of outer cladding have male and female fittings

9 cobalt target rod segments are screwed together to match the size of a fuel rodSmall number cobalt target rods are placed in fuel bundles in lieu of fuel rods • 92 total rods in a GE14 fuel bundle• Segment splice points are under spacer positions


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Segmented rods previously used by GE Fuels • Used for spacer capture in earliest GE fuel designs

• Testing of different fuel cladding materials in 1990’s

Cobalt target rods made from same zirconium material as UO2 fuel rods• 2 layers of zirconium cladding

• Solid zirconium at spacers where debris may collect

Cobalt Target RodsIrradiated in Reactor

Fuel Bundles with cobalt target rods shipped to the nuclear power station along with balance of new fuel bundles and placed in the spent fuel pool

New fuel bundles are loaded into the reactor during a refueling outage

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reactor during a refueling outage• Approximately 300 new fuel bundles

are loaded into a reactor every 2 years

The reactor is brought on-line for normal 2 year operating cycle

Cobalt-59 atoms absorb neutrons from nuclear fission process and become Cobalt-60

The fuel bundles with cobalt target rods are removed from the reactor along with other used fuel bundles during refueling outageAfter refueling outage the cobalt target rods are removed from fuel bundles

Cobalt Target Rods Removed from Reactor

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bundles• The fuel bundles are placed back

into spent fuel pool with other used fuel bundles

Cobalt target rods are disassembled at splice points and rod segments are loaded into a rod segment canister Rod segment canister is placed in NRC licensed shipping cask

Shipping Irradiated Cobalt Target Rods

Radioactive material shipping cask is loaded on a truck trailer

Trailer is shipped to GE-Hitachi hot-cell facility in Vallecitos, CA

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REVISIONS

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Cobalt-60 Targets Separated for Use

Separation and handling of cobalt from target rods to be performed at the GEH facility

Existing hot-cell at GEH Vallecitos CA facility well

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Vallecitos, CA facility well suited for handling Cobalt-60

Co-60 Gamma Knife

Non-Invasive brain surgeryNearly ½ million people treatedGE experienced in gamma knife sourcesNon-Invasive gamma cancer treatment

growing to other cancer fieldsHigh Specific Activity (HSA) cobalt-60

targets required (4 t 6 f i di ti d d)

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(4 to 6 years of irradiation needed)

Co-60 Sterilization

Eliminates harmful pathogensLengthens food shelf lifeGrowing public acceptanceAlso used in medical and blood sterilizationLow Specific Activity (LSA) cobalt-60 targets

required (2 years of irradiation needed)

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232 Gamma irradiators in use today25% Needs replenishing per yearE.Coli outbreaks increasing need

Clinton Power Station (CPS)Lead Test Assembly (LTA) Agenda

CPS LTA Project Description

Use of LTA framework

LTA Report

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LTA License Amendment Request

CPS LTA Design Schedule

GEH Technical Evaluation Report

Exelon’s Configuration Control Process

LTA Handling and Shipping

CPS GE14iLead Test Assembly (LTA) Project

LTA programs have been successful in the controlled introduction of new fuel designs

To use proven Global Nuclear Fuel (GNF) GE14 fuel bundles as host for cobalt target rods

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Bundles with cobalt target rods (designated GE14i) are inserted into operating reactor core to confirm expected operations

Purpose of the CPS LTA Program is to obtain data to verify the GE14i fuel bundles perform satisfactorily in service prior to use on a production basis

A separate project would be required to move forward with a Bulk (large scale) Isotope Generation program

Utilize Lead Test Assembly (LTA) Framework

GE14i fuel bundles with cobalt target rods are still fuel assemblies• Energy production is the primary purpose of the fuel

assemblies • Majority of the rods in the bundles contain UO2 (over 90%)• Physical geometry of the GE14 fuel bundles not affected

The analysis of the GE14i LTAs using approved

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The analysis of the GE14i LTAs using approved methods meets the approved criteriaThe number of GE14i LTAs used will be numerically small• Less than 2% of the core• If an LTA failure occurs the amount of cobalt is restricted and

easily handled by the normal plant operating systems

The GE14i LTAs will be placed in non-limiting core locations

CPS GE14i LTA Report

The report provides the NRC with information on the GE14i LTAs per the approved LTA guidelines

Non-Proprietary and Proprietary versions to be provided with CPS License Amendment Request

Describes and displays new segmented target rod d i f t

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design features • Cobalt targets, target holding cylinders, target rod end

caps, etc.

Describes the licensing analyses that are being performed or are being completed with the CPS cycle 13 reload licensing activities

Outlines the post-irradiation LTA measurements

CPS GE14i LTA License Amendment Request

Scope of LTA License Amendment Request (LAR)• Revise and add operating license conditions to clarify how

byproduct materials are handled at CPS− Allows for the intentional production and transfer of byproduct

material in accordance with 10 CFR 30− Clarifies how the mechanical disassembly of items or

components containing byproduct material is not considered

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components containing byproduct material is not considered separation of the byproduct material

• Change to Technical Specification Design Features section to describe the LTAs being used

LAR was reviewed by PORC and approved by NSRBLicense Amendment Request and LTA Report are ready to be submitted following this meeting

LTA Design Schedule Overview

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GEH Technical Evaluation Report (TER)

TER for GE14i LTAs to qualitatively and quantitatively address the following:• Abnormal operational transient events

− Reactor pressure changes

− Reactor temperature changes

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p g

− Reactor water level changes

− Reactor water flow changes

− Positive reactivity events

• Design basis accident events

• System and program evaluation requirements

TER Revision 0 to be issued in May 2009

TER Revision 1 to be issued after CPS cycle 13 licensing activities are completed, Fall 2009

Exelon Configuration Control Process for GE14i LTAs

Evaluate GE14i LTA bundles with a Design Change Package (DCP – Exelon’s plant modification engineering package)• Ensures LTA performance of design basis functions• Ensures LTA compliance with plant licensing basis

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• Evaluates LTA affects on other structures, systems and components

• Utilize GEH/GNF’s Technical Evaluation Report as basis of design change

• Exelon system and program owners to evaluate impacts of the LTAs

• 10 CFR 50.59 evaluation to address impacts to SAR –referencing the License Amendment Request

Exelon Configuration Control Process for GE14i LTAs

Evaluate the utilization of the GE14i LTA bundles in the reload core with the CPS Cycle 13 Fuel Change Package (FCP – Exelon’s core reload engineering package)• Ensures reload core performance of design basis functions

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• Ensures reload core compliance with plant licensing basis• Evaluates reload core affects to other structures, systems and

components• Exelon system and program owners to evaluate impacts of

the reload• 10 CFR 50.59 evaluation to address impacts to SAR –

referencing the License Amendment Report• Use of LTA bundles in future cycles to be evaluated in

subsequent reload FCPs

LTA Safe Handling ProcessesGE14i LTA bundles to be received using normal receipt procedures

Post-Irradiation Handling• Staged spent fuel pool locations for interim storage

• Segmented rod handling to have Exelon technical

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evaluations and mock-up tests prior to use

• GNF fuel handlers to perform work under Exelon Outage Services supervision

• Fuel bundle disassembly similar to fuel inspections

• Rod segment basket and shipping cask loading by detailed Level 1 procedure

• NRC licensed shipping cask loaded on trailer for cross-country transport

Safeguard Shipping per NRC regulations handled by GEH

Utilize NRC licensed shipping cask

Cobalt target rod ownership will transfer from Exelon to GEH at CPS protected area

t

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gate

Shipments will qualify as Type B Shipment of Class 7 (radioactive) hazardous material• Shipments will be a highway route controlled

quantities

CPS GE14i LTA Shipping Schedule

Remove and ship 1 cobalt target rod after 2 years of irradiation• Remove cobalt target rod from an LTA bundle during 2012

scheduled refueling outage

• Perform inspections and measurements as part of the Lead Test Assembly process

• Remove cobalt target rod and ship to Vallecitos, CA

• Cobalt targets would be available for sterilization processes

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• Cobalt targets would be available for sterilization processes

Remove and ship balance of cobalt target rods after 4 or 6 years of irradiation • Remove cobalt target rods from LTA bundles during 2014 and 2016

scheduled refueling outages

• Perform inspections and measurements as part of the Lead Test Assembly process

• Remove cobalt target rods and ship to Vallecitos, CA

• Cobalt targets would be available for medical treatment processes

Questions

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bulk isotope generation project clinton power station

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