TINT Facility Test Case
By…Nanthavan Ya-anant
Radiation Waste Management Center Thailand Institute of Nuclear Technology(TINT)
Chatuchack, Bangkok, Thailand
Technical Meeting on Safety Assessment Driving Radioactive Waste Management Solutions(SADRWMS) 12-16 Apr 2010, Vienna, Austria.
Vienna November 2007: Overview of SAFRAN Tool
2 Technical Meeting on Safety Assessment Driving Radioactive Waste Management Solutions, 12-16 Apr 2010, Vienna, Austria.
Background
Thailand proposed to be a Test Case of IAEA International Project on Safety Assessment Driving Radioactive Waste Management Solutions, SADRWMS in the 5th Plenary Meeting on SADRWMS Project in Stupicke Toplice, Croatia, during23-27 June 2008.
Vienna November 2007: Overview of SAFRAN Tool
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TINT Test Case Step by Step..
The TINT- Predisposal RWM facilities where located at Chatuchak district, Bangkok, have been chosen as a test case for the SAFRAN software within the framework of the SADRWMS project.
After that, we had the following activities:
Expert missions ( 4 missions) • Preparation of document-data, regarding to the methodology (word document) • Input Data to SAFRANS software and creation scenarios • Calculation to get the results for the End Point. • Preparation of Safety Report
Technical Meeting on Safety Assessment Driving Radioactive Waste Management Solutions, 12-16 Apr 2010, Vienna, Austria.
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Content in the preparatory Document for Data Input
1.Background of RWM in Thailand
2. Assessment context • Purpose of the assessment • Scope of the assessment • Assessment approach
3. Site description (include map and etc)
4. RWM Facilities description (include layout,drawing, photos) 5. RWM activities 6. Waste and Waste Stream Waste Producers Waste companents (radionuclides, activity, dose-rate, Non-radiological properties) 7.Safety Elements
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TINT Test Case to Develope the SAFRAN
Facilities:
• Processing Facilities
• Storage Facilities
Regulatory Framework
• National and international
regulations
Waste Streams
• Newly arising wastes
• Existing wastes
RWM Activities
characterization, segregation, incineration,
compaction, liquid treatment, discharge,
conditioning and storage
SAFRAN Tool
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Types of safety elements
Site selection
Safety functions
Limits and conditions
Mantainance requirements
Operational procedures
Emergency procedures
Management systems
Can be linked to physical elements
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Characterization
Characterised waste
Solid & Liquid
Conditioning
Conditioning
Waste segregation
Disused SRS
Waste processing
Conditioned waste
Packaged waste
Treated waste
Re-Packaging
Packaged waste
TINT Wastes Stream Diagram
Processing facility
Primary Waste
Storage Facility
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Predisposal activities
characterization,
segregation,
incineration,
compaction,
liquid treatment,
discharge,
conditioning
storage
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Facilities Items Capacity Type of Waste Operational year Operational
Age ( years)
Solid Waste Treatment Liquid Waste Treatment Liquid Storage Conditioning Storage
- Incinerator equipped with off gas cleaning system - Compactor - Accelerator for chemical-precipitation plant - Stainless steel Tanks In Drum Cement Mixer - Storage facility no.1 - Storage facility no.2
15 kg/hr
40 ton
5 m3
5 m3 x 2
200 Liter
65 m2 x 4.5 m
80 m2 x 4.5 m
Burnable waste Compactable waste Aqueous waste low salt content Organic liquid waste Treated Waste; - ashes, sludge Disused SRS Processed Waste
1987
1993
1965
1995
1993
1994 1997
20
14
42
12
14
13 10
RWM Predisposal Facilities at TINT, Chatuchak, Bangkok
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DSRS Storage
Cooling Tower
Incinerator
StorageTanks organic liquid
Temporary storage of organic liquid waste
Layout of Area 1 - Incineration system - Storage Tanks of organic liquid waste
- DSRS Storage Facility
-Temporary storage of organic liquid waste
- Underground tanks for reactor effluents and aqueous wastes
Underground tanks
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11 Incineration Building Off-gas System
Incineration Facilities
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Storage Tanks for Organic Liquid Waste
Location: Next to the Incineration Building
Replace with non-smoking area
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Underground Tanks for Reactor Effluent and Aqueous Waste
Temporary Storage of Organic Liquid Waste in Plastic container(20L) before Further Management.
Location: Near the working place of reactor maintenance and the DSRS storage
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DSRS Storage Facility at TINT-Chatuchak
In front of the DSRS storage facility
Location : DSRS Storage Facility is close to the Incineration Building
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Filtration System
Retention Pool
Aqueous Waste Treatment System
Underground Tanks
Discharge
Filtering System
Waste Processing Facility in Area 2
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Compaction Cementation
Waste Processing Facilities
Location: At the same place as the Chemical-precipitation system
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)
Drum storage Facility at Storage2,Chatuchak
Location : It is close to the retention pool and the RWMC Office
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Safety Assessment types
Normal operation and accidents
Impact on workers and members of the
public
Impact outside and inside the facilities
Scenario Development Assessment of Impacts
• System performance (doses and other impacts to workforce and to the public) under normal conditions
• Potential impacts (all relevant external and internal hazards) from all relevant events and processes
• Non-radiological risks
• Environmental impacts
*Scenario Development Normal Operations
*Scenario Development Anticipated Operations and Accidents
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Dose Limitation “ The value of the effective dose or the equivalent dose to
individuals from Controlled Practices that shall not be exceeded”
Occupational exposure of any worker shall be so controlled
that the following limits be not exceeded : (a) An effective dose of 20 mSv per year (b) An equivalent dose to the lens of the eye of 150 mSv in a
year and (c) An equivalent dose to the extremities (hands and feet) or
the skin of 500 mSv in a year
Annual Effective Dose Limit for general public 1 mSv per year
Use of Safety Assessment Results of TINT Test Case
– Identifying required and most cost effective improvements in facility design and operation
– Building confidence that the designed system is robust and will meet safety requirements
– Demonstrating the quality and reliability of the analysis used to evaluate performance of the pre-disposal system
– For regulator review for license
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STATEMENT OF Thai RWM Operator
1.As a result of participating in the TINT Test Case project and the associated expert missions, numerous safety
improvements were identified and implemented, so that the Predisposal RWM facilities and operation safety has
been improved.
2.Use of the SAFRAN Tool complies with the Predisposal RWM safety requirements (IAEA), making it is
convenient for operators to adopt the IAEA safety requirements
3.The safety information developed during the test case can be used in developing the Cost Benefit Analysis for
improvements to the facility
4.The test case project improved the confidence of the RWM operators in the safety of the facility and in their
understanding of the comprehensive and systematic picture of the safety assessment.
5.The Test Case project provides the facility with the ability to identify the real hazards and determine those
hazardous conditions which the operator could immediately improve.
6.The Safety Assessment report will provide a transparent and clear record of the safety assessment information,
which can be submitted to the regulatory authority as well as to the public
7.Lessons learned from the test case, including the improved knowledge of Safety Case and Safety assessment,
and SAR etc., will support the establishment of the new RWM Facility at Ongkharak site
8.Although the Test Case project allowed the Thai participants to become familiar with using the SAFRAN tool and
in performing Safety Assessment, the program is complicated, and to prepare the data for the test case required a
systematic approach based on worker experience.
9.The SAFRAN tool is not easy for new users. to learn to use by themselves. Additional training on the
methodology and practical application would be appreciated, as well as further promotion and support from the
IAEA and other sources.
STATEMENT OF THAI REGULATOR
The demonstration of the TINT Facility Test Case will improve the practical experience and technical knowledge of
the national regulatory body in application of regulations, safety standards, safety criteria, safety requirements,
etc. The Test Case will be very useful in assisting the regulator in the future licensing of the new RWM facility.
In terms of upgrading the licensing process for radioactive waste facilities and activities, OAP will need to establish
the criterion for licensing. One of main issues will be the safety assessment which the licensee should consider
and submit to OAP. This SAFRAN model will be useful for both TINT and OAP.
The use of the SAFRAN Tool has allowed the TINT Facility to identify and capture comprehensive details at each
stage of Predisposal RWM Facilities and Activities
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Finally, we get the primary assessment goals: Do doses and discharges meet criteria? Is the operation safe? ……To be continue….. By Dr. Wolfgang Goldammer Thank you for your kind attention!
