International Structure for Decommissioning Costing (ISDC

Workshop on Cost Estimation and Cost Analysis of Nuclear Projects and Programmes

September 30 – October 03, 2019Idaho Falls, USDusan Daniska

[email protected]

International Structure for Decommissioning Costing (ISDC) based

Software Support for Decommissioning Cost Estimation

TABLE OF CONTENTS

Intro

Decommissioning progress in Slovakia

01

03

0204

05

06

Cost estimation methodology & steps

ISDC

Waste management simulation example

Software features

● NPP Bohunice A-1, in decommissioning● NPP Bohunice V-1, in decommissioning● NPP Bohunice V-2, operational● NPP Mochovce 1,2, operation● NPP Mochovce 3,4, under construction

NUCLEAR FACILITIES IN SLOVAKIA

● Radioactive waste management facilities● Interim storage of spent fuel● Liquid radioactive waste management treatment

facilities● National radioactive waste repository● Experimental bitumenation facility

~60 km

NPP LIFECYCLE

CONSTRUCTION

OPERATION SHUTDOWN

LIFETIME EXTENSION

DECOMMISSIONING

DECOMMISSIONING LIFECYCLE

Decommissioning is a long-term and expensive process & can span over more generations.

Precise planning and cost optimisations are expected.

● Selected decommissioning strategy● Waste amounts and its radioactivity● Clearance limits and acceptance criteria● Availability of waste treatment technologies and their costs● Salaries● Project duration● Social license for waste disposal● Site-specific decommissioning conditions● Known & unknown risks

○ Technical○ Social○ Political○ Natural○ Unidentified

DECOMMISSIONING COST DRIVERS

DECOMMISSIONING PROGRESS IN SLOVAKIA

Pulling off the 145 tonne steam generator from the hermetic zone.

Source: www.javys.sk


Placing the steam generator to the corridor before the transport



Transport of the steam generator to the interim storage before its fragmentation


Calculation parametersChoose proper calculation

procedure and define calculation parameters for each

activity

BIM for DecommissioningLink the decommissioning activities

with the Building Information Model for Decommissioning

COST ESTIMATION METHODOLOGY

Decommissioning activitiesChoose relevant decommissioning activities

for our project

ISDCInternational Structure for Decommissioning Costing of Nuclear Facilities is recommended by IAEA and provides a typical list of

decommissioning activities including preparation, final site clean up or specialized R&D.

Calculation parameters BIM for Decommissioning

COST ESTIMATION METHODOLOGY, contd.

Waste managementConfigure waste management scenarios for

various types of wastes

Result - cost estimationCost estimation is based on ISDC

decommissioning activities, Building Information Model and waste management

scenarios

COST ESTIMATION STEPS

INVENTORY DATABASE

Build a BIM for the decommissioned facility.

This includes the site structure (buildings, floors, rooms) and

inventory database with all relevant data.

CALCULATION STRUCTURE

Use ISDC to choose the decommissioning

activities planned for the project and configure the calculation procedures &

parameters for each activity.

WASTE MANAGEMENT

Define the waste management scenarios for each type of waste

separately. This includes cost factors for waste

treatment.

CALCULATION PARAMETERSConfigure general

calculation parameters like unit factors, waste acceptance criteria & limits or work groups.

RUN THE CALCULATION

Result = cost estimation for the decommissioning

ANALYZE & RERUN

Create a copy of the existing cost estimation, alter the inputs, rerun the

calculation and do the sensitivity analysis.

1 2 3

4 5 6

■ International Structure for Decommissioning Costing of Nuclear Installations■ Recommended by IAEA■ Project oriented, systematic list of typical decommissioning activities

developed for presenting the costs for various decommissioning project of all types of nuclear installations

■ Standardized hierarchical structure with three numbered level aggregating the data bottom to top – opened down to the third numbered level for any user

■ Common platform for presenting of decommissioning cost for any nuclear facility as for type and size; complexity of systems and structures and radiological conditions (including the installation terminating the operation after accident)

ISDC - WHAT IT IS?

ISDC - BASIC STRUCTURE

Level 1Level 2

Level 3

Principal activities

Activity groups

Cost items

Typical decommissioning activities with detailed definitions and examples.

Labour

costs

Investments

Expenses

Contingency

■ 01 Pre-decommissioning actions■ 02 Facility shutdown activities■ 03 Additional activities for safe enclosure or entombment■ 04 Dismantling activities within the controlled area■ 05 Waste processing, storage and disposal■ 06 Site infrastructure and operation■ 07 Conventional dismantling and demolition and site restoration■ 08 Project management, engineering and support■ 09 Research and development■ 10 Fuel and nuclear material■ 11 Miscellaneous costs

ISDC - LEVEL 1 - LIST OF PRINCIPAL DECOMMISSIONING ACTIVITIES

ISDC - TYPICAL SCHEDULE FOR IMMEDIATE DISMANTLING (PRINCIPAL ACTIVITY 04)

ISDC - WHY USE? BENEFITS?

HARMONISATIONCost estimations based on ISDC use the same cost

structure - are harmonized.

BENCHMARKING

Harmonized cost estimations can be easily benchmarked to

verify their accuracy.

CHECKLISTISDC is a project-based

checklist of all activities that has to be done during the

decommissioning. Can be considered as a standardized WBS for decommissioning.

WASTE MANAGEMENT SIMULATION CONFIGURATION

Example:Carbon steel

We will show a sample treatment process for a carbon steel.

Each carbon steel waste is compared to clearance limits. We will define a stream when

this waste can be released to environment.


Fragmentation

The waste is fragmented. Fragmentation is a technology and generates a waste of another

type:

Fragmented carbon steel ready to be released to environment.


Clearance measurements

Fragmented carbon steel is measured to ensure that it is ready to be released.


Transport and release

Measured carbon steel waste is transported and released to the environment.


Final state

Carbon steel released to the environment is the final stage of waste stream. No further

processing is necessary.

Visualisation of a waste management simulation scenario for carbon steel in a real cost estimation ...

VISUALISATION


... zoomed into a example presented before

VISUALISATION


■ BIM database for nuclear decommissioning■ ISDC-based cost estimation structure■ Configurable waste management■ Sensitivity analysis - comparison of various estimations■ Large set of calculation parameters■ Nuclide decay simulation■ Monte Carlo based uncertainty analysis■ Project gantt chart & schedule■ Intuitive multi-user interface■ Secure client/server architecture■ Support for very large cost estimates■ Ready to buy

LIST OF SOFTWARE FEATURES

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Dusan Daniska

[email protected]/buy

AquilaCosting - software for nuclear decommissioning cost estimations

THANK YOU

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Documents

International Structure for Decommissioning Costing (ISDC