Description
Safety is the state of being "safe" (from French sauf), the condition of being protected against physical, social, spiritual, financial, political, emotional, occupational, psychological, educational or other types or consequences of failure, damage, error, accidents, harm or any other event which could be considered non-desirable.
International Project on Complimentary Safety Reports, Development and Application to Waste Management Facilities (CRAFT) First Plenary Meeting 9 – 13 May 2011 at IAEA Headquarters
Chairman’s Report
Background
In 2004, the International Atomic Energy Agency (IAEA) organized the International Project on Safety Assessment Driving Radioactive Waste Management Solutions (SADRWMS) to examine international approaches to safety assessment for predisposal management of all types of radioactive waste, including disused sources, small volumes, legacy and decommissioning waste, operational waste, and large volume naturally occurring radioactive material residues. The initial outcome of the SADRWMS Project was achieved through the development of a series of flowcharts intended to improve the mechanisms for application of safety assessment methodologies for predisposal management of radioactive materials. These flowcharts have since been used in the development of the following: ? In 2005 the SADRWMS Project developed initial specifications for a software tool to apply the SADRWMS flowcharts. This tool was called the Safety Assessment framework (SAFRAN) software tool. Subsequent meetings of the SADRWMS Project were used to refine the SAFRAN tool, using existing facilities to test individual components of the SAFRAN Tool and methodology, and to develop supporting documentation. In 2008, the flowcharts were incorporated into the draft Safety Guide DS284 on the Safety Case and Safety Assessment for Predisposal Management of Radioactive Waste. DS284 provides guidance for assessing and demonstrating the safety of predisposal management of radioactive waste of all types, and covers all the steps in its management, from its generation up to its disposal, including its processing (pretreatment, treatment and conditioning), storage and transport. In 2008 the SADRWMS plenary agreed that the DS284 methodology and SAFRAN tool could be applied to a test case that had been offered by Thailand.
?
?
In 2010 the IAEA presented DS284 to the 29th Meeting of the Waste Safety Standards Committee (WASSC) for approval. During discussions it was proposed that the use of the graded approach be illustrated through the development of supporting Safety Reports, beginning with the Thailand Test Case, followed by other Safety Reports. Subject to approval by the WASSC Chair, WASSC agreed that DS284 could be submitted to the CSS for approval (anticipated to occur in November 2011). The 6th Plenary Meeting of the international SADRWMS Project was held in April 2010
1
in order to review the outcomes of the TINT test case, and to develop a work plan for the subsequent project. It was agreed that the completion of complimentary safety reports illustrating the use and application of the DS284 methodology and the SAFRAN tool would be a significant part of the follow up project. To oversee the development of these complimentary safety reports it was agreed to establish the International Project on Complimentary Safety Reports, Development and Application to Waste Management Facilities (CRAFT). This report documents discussions and outcomes from the first plenary meeting of the International CRAFT Project.
Introduction
The first plenary meeting of the International CRAFT Project was held between 9 and 13 May 2011 at the IAEA’s Headquarters in Vienna, Austria. The meeting was attended by over 30 specialists from 23 countries and was chaired by Mr Christopher Fisher (UK) with Mr Frederic Ledroit (France) co-chairing. Ms Monika Kinker of the IAEA Waste and Environmental Safety Section was the Scientific Secretariat for the meeting. The main objectives of the CRAFT Plenary Meeting were to: ? Develop the Terms of Reference for the CRAFT Project (development of complimentary safety reports illustrating the application of DS284 to predisposal radioactive waste management facilities); Review the outcomes of the SADRWMS project (Methodology Report, SAFRAN software tool); Review the results of the SADRWMS test cases (TINT and Studsvik); Discuss the use of existing national facilities as application cases in support of CRAFT project activities.
? ? ?
The meeting was conducted according to the agenda which can be found in the CRAFT fileshare site (http://ns-files.iaea.org/fileshare/amer/default.asp?ac=3&fd=453). The meeting was opened by Mr. Magnus Vesterlind of the IAEA, who welcomed the participants and emphasised the importance of the CRAFT Project to the IAEA. Predisposal radioactive waste management covers a broad area with multiple types of facilities, activities, and waste arisings, and the application cases supported by the CRAFT Project will provide valuable feedback on the application of DS284.
Participants
E Piumetti (Argentina), G Williams (Australia), J Walker (Canada), D Trifunovic (Croatia), R Gil Castillo (Cuba), K Jindrich (Czech Republic), F Ledroit (France), G Nabakhtiani (Georgia), C Drobniewski (Germany), U Oppermann (Germany), G Bruno (IAEA, Unit Head - Radioactive Waste and Spent Fuel Management), M Kinker (IAEA Scientific Secretary), M Vesterlind (IAEA, Section Head - Waste and Environmental Safety), J Jafari (Iran), R Jafarian (Iran), SN Lim (Republic of Korea), V Ragaisis
2
(Lithuania), A Rehman (Pakistan), O Nicule (Romania), N Anisimov (Russia), A Guskov (Russia), E Shevtsova (Russia), A Smetnik (Russia), A Tkachenko (Russia), Q Al-Jaseem (Saudi Arabia), J Raicevic (Serbia), P Salzer (Slovakia), D Mphahlele (South Africa), R Avila Moreno (Sweden), D Hofman (Sweden), T Huutoniemi (Sweden), S Skoog (Sweden), N Ya-anant (Thailand), N Luwalira (Uganda), N Blundell (UK), C Fisher (UK).
Meeting Record
Copies of all presentations, information papers and working papers for the meeting can be found at (http://ns-files.iaea.org/fileshare/amer/default.asp?ac=3&fd=453).
Presentations: A number of presentations were delivered during the plenary. These included: ? ? ? ? ? ? ? ? ? Scientific Secretariat Ms. Monika Kinker on the status of the IAEA safety requirements and relation of DS284 to the CRAFT Project SADRWMS Chair Mr. Geoff Williams of Australia on the Initial objectives and activities of the SADRWMS project by the SAFRAN software tool developer Mr. Rodolfo Avila Moreno of Facilia on the outcome of the SADRWMS Project (methodology and SAFRAN tool Mr. Dmytro Hofman of Facilia on the SAFRAN website and forum Mr. Frederic Ledroit of France on the SAFRAN steering group Ms. Nanthavan Ya-anant of Thailand on the results of the Thailand Institute of Nuclear Technology (TINT) test case Mr. Tommi Huutoniemi and Ms. Sofie Skoog of Sweden on the results of the Studsvik test case Mr. Susanta Samanta of the IAEA Waste Technology Section on a generic modular design of processing and storage facilities for small volumes of low level and intermediate level radioactive waste and disused sealed radioactive sources Mr. John Kinker of the IAEA Waste Technology Section on the IAEA Net Enabled Waste Management Database the importance of General Safety Requirements Parts 4 and 5, as well as DS284 to the CRAFT Project; the success of the SADRWMS project in illustrating the application of the methodology described in DS284 and the use of the SAFRAN tool; the outcomes and benefits reported by the TINT and Studsvik test cases; the importance of the SAFRAN steering group to the development of the SAFRAN tool; The implications of relying solely on generic models and data:
Key points raised in the presentations were: ? ? ? ? ?
3
?
? ? ?
? Important when facilities have limited access to relevant facility- or sitespecific data. ? Agreement that models which make use of generic data which is not sitespecific should be conservative. ? Risk that novice users may misinterpret models and parameters the benefits of the host country/organization for test cases - in the particular case of the TINT facility they now have a clear and transparent record which can be used for documenting their safety case and for discussions with the regulatory authority; whether disposal drives, or is driven by the safety case for a predisposal facility; the benefits of considering clearance when developing a predisposal radioactive waste management project; Whilst NEWMDB collects data from about 40 countries and covers about 90% of the wastes produced by the NPPs across the world, it generally does not allow for the association of waste volumes with specific facilities necessary for a safety assessment.
Identification of CRAFT working groups: The participants were invited to provide the plenary meeting with information on waste management in their countries. Mr Blundell of the UK made a presentation on the Waste And Source matter Analysis (WASAN) methodology being applied across sites in the UK. Mr Castillo of Cuba presented a possible application case to the group for a small facility dealing with sealed sources such as smoke detectors, etc. It was also suggested that there would be benefit in translating SAFRAN into Spanish. Mr G Nabakhtiani of Georgia provided a verbal briefing on a centralised waste storage facility whose waste mostly originating from reactors and disused sources, and proposed to use the SAFRAN tool to help the development of their safety assessment. Using this information the plenary then identified a number of work areas where they saw a need to develop further guidance in illustrating the application of the DS284 methodology and the SAFRAN software tool. Subsequently three working groups were identified, these included: ? ? ? processing facilities; long term storage facilities; and existing storage facilities.
A fourth working group was established to finalise the reports associated with the SADRWMS project. A further working group was suggested on the operation of a disposal site. It was agreed that this would be addressed at a subsequent CRAFT meeting.
4
Outcomes of the SADRWMS Project SAFRAN Software Tool: The TINT and Studsvik test cases concluded that the SAFRAN tool successfully implements the methodology in DS284 chapter 5, but highlighted the importance of model validation and verification, especially when there is a lack of relevant (e.g., site- or facility- specific) data. In the future the CRAFT project will need to look at both aspects. It was agreed that in the next plenary there will be a regulators working group whose role will include to look at validation of the data entered and modelling approaches used. The SAFRAN software tool is available on the SAFRAN website, which contains the latest version of the SAFRAN software tool and associated SAFRAN User’s Guide and Tutorial. The CRAFT Project will require a User’s Forum which contains all of the documents and applications supporting the use of SAFRAN and provides for sharing of information. The SAFRAN website is currently maintained by the software developer Facilia. It was noted by the participants that the SAFRAN tool is a valuable screening tool, but that for more complex facilities it should be complemented with other models and software tools, and using site specific data. The meeting noted that the Studsvik test case work was performed against an older version of SAFRAN, and that more work would be required to make the Studsvik file compatible with the current version of the SAFRAN tool. On Wednesday afternoon Mr Dmitry Hofmam provided training on the SAFRAN tool, which the majority of the participants attended. The training made use of the tutorials which are included in the SAFRAN webpage. SADRWMS Methodology Report: Mr Avila of Facilia and Mr Ragaisis of Lithuania presented the SADRWMS methodology report, which documents the SADRWMS methodology and its implementation in the SAFRAN Tool. The report is also provided with two Annexes that describe the calculations and parameters used in the tool. Work was done during the week to re-structure the text and to complete the discussion on calculations and parameters. TINT Test Case Report: Frederic presented the TINT test case report, which documents the application of the DS284 methodology and the SAFRAN tool on the TINT Radioactive Waste Management Facility. This test case was performed with particular emphasis on investigating the application of the DS284 methodology and the use of the SAFRAN Tool in developing a safety case for facilities like TINT. Work was necessary during the week to make sure that the SAFRAN tool and the report are consistent, specifically the Report Module, to fix discrepancies previously highlighted, and to take into account comments from previous reviews of the document. STUDSVIK Test Case Report: Ms. Sofie Skoog of Sweden presented the Studvik test case report. This test case was performed with particular emphasis on reviewing the SAFRAN software as an implementation of the methodology outlined in DS284 and comparing Studsvik’s dose coefficients against the default values provided in the SAFRAN Tool. Work was performed during the week to finalize the document for publication on the CRAFT web folder.
5
Application of DS284 to Long Term Storage Facilities The focus of this group was on those facilities which are intended to have an extended design life of the wastes and structures, i.e. beyond 50 years. This concept involves a period of time which may exceed the normal design life of civil structures. The scope of this working group included both new facilities and the issues which would need to be addressed during design, and existing facilities in which the expected timeframe was not necessarily considered during its design. There were a number of themes that kept repeating throughout the document, for example security and records management. A future meeting will need to look at how to address these themes. One unusual aspect of long term storage facilities is the greater emphasis on the socioeconomic relationship of the facility and safety. Application of DS284 to Existing Storage Facilities The focus of this group was on facilities which may not meet current regulatory standards or may have degraded safety functions. For these types of facilities, the role of the safety case and supporting safety assessment is necessary for assessing and demonstrating continued safe operating conditions and the potential impact of changing regulatory standards. The scope of this working group included periods of emplacement and post emplacement but exclude decommissioning activities. It also considered extension of the conditions in the licence for the existing storage facilities. The group noted that Figure 5 of the SADRWMS methodology is challenging for the older storage facilities as it doesn’t easily allow an upgrade of the facility. To do this the flowchart would have to direct the user back to Figure 2 of the methodology. The group also noted that an application case for a Radon facility would be a good representation of this type of application. The particular facility discussed is being studied as a location for additional waste storage. Application of DS284 to Waste Processing Facilities The focus of this group was on facilities used to process radioactive waste, including operations that extend from the arising to the disposal/storage and including liquid and solid waste and gaseous wastes prior to facility discharge. Improvements were identified for the charts produced by SADRWMS. The group noted that the need to look at the links between the safety case for unit operations and for larger facilities which are operated for other purposes (e.g., nuclear power plants). The group identified that some of the limitations placed on the guidance they had produced was, in part, due to their experience. In the future the IAEA may wish to consider encouraging input from small users, such as hospitals. For an application case it
6
would be useful to look at a facility dealing with several different types of waste arisings and processes.
Generic issues During the week the three working groups collaborated on a review of their application cases and identified a number of general points relevant to all three applications. During the final plenary the following general points were also noted: ? ? ? ? ? Waste acceptance criteria between the various generators and predisposal and disposal radioactive waste management facilities and regulatory limits are critical to the process of waste management Record keeping was considered to be a critical component and it was recognised that maintenance of records from generation through the expected periods of long term storage may not yet have a solution It should be recognised that regulatory expectations may not follow the logic presented in DS284 There is a need to look at more discussion on the use of models, i.e. process flowcharts, product development, etc. Concerns were expressed with using existing national facilities as test cases
Meeting Outcomes and Future Activities
The plenary agreed that this first plenary meeting of the CRAFT project was a success. It was agreed that the working groups would continue to consider their areas using the forum for correspondence. The IAEA will work with those countries that had shown an interest in hosting an application case. These include Cuba, Georgia, Russia and Australia. The next plenary meeting of the project will be in 2Q 2012. It will continue to build on the work started in this first plenary meeting, looking to address: ? ? ? regulatory review and verification of data; generic issues, including the use of models; and progress on the safety report and the application cases.
7
doc_139303808.pdf
Safety is the state of being "safe" (from French sauf), the condition of being protected against physical, social, spiritual, financial, political, emotional, occupational, psychological, educational or other types or consequences of failure, damage, error, accidents, harm or any other event which could be considered non-desirable.
International Project on Complimentary Safety Reports, Development and Application to Waste Management Facilities (CRAFT) First Plenary Meeting 9 – 13 May 2011 at IAEA Headquarters
Chairman’s Report
Background
In 2004, the International Atomic Energy Agency (IAEA) organized the International Project on Safety Assessment Driving Radioactive Waste Management Solutions (SADRWMS) to examine international approaches to safety assessment for predisposal management of all types of radioactive waste, including disused sources, small volumes, legacy and decommissioning waste, operational waste, and large volume naturally occurring radioactive material residues. The initial outcome of the SADRWMS Project was achieved through the development of a series of flowcharts intended to improve the mechanisms for application of safety assessment methodologies for predisposal management of radioactive materials. These flowcharts have since been used in the development of the following: ? In 2005 the SADRWMS Project developed initial specifications for a software tool to apply the SADRWMS flowcharts. This tool was called the Safety Assessment framework (SAFRAN) software tool. Subsequent meetings of the SADRWMS Project were used to refine the SAFRAN tool, using existing facilities to test individual components of the SAFRAN Tool and methodology, and to develop supporting documentation. In 2008, the flowcharts were incorporated into the draft Safety Guide DS284 on the Safety Case and Safety Assessment for Predisposal Management of Radioactive Waste. DS284 provides guidance for assessing and demonstrating the safety of predisposal management of radioactive waste of all types, and covers all the steps in its management, from its generation up to its disposal, including its processing (pretreatment, treatment and conditioning), storage and transport. In 2008 the SADRWMS plenary agreed that the DS284 methodology and SAFRAN tool could be applied to a test case that had been offered by Thailand.
?
?
In 2010 the IAEA presented DS284 to the 29th Meeting of the Waste Safety Standards Committee (WASSC) for approval. During discussions it was proposed that the use of the graded approach be illustrated through the development of supporting Safety Reports, beginning with the Thailand Test Case, followed by other Safety Reports. Subject to approval by the WASSC Chair, WASSC agreed that DS284 could be submitted to the CSS for approval (anticipated to occur in November 2011). The 6th Plenary Meeting of the international SADRWMS Project was held in April 2010
1
in order to review the outcomes of the TINT test case, and to develop a work plan for the subsequent project. It was agreed that the completion of complimentary safety reports illustrating the use and application of the DS284 methodology and the SAFRAN tool would be a significant part of the follow up project. To oversee the development of these complimentary safety reports it was agreed to establish the International Project on Complimentary Safety Reports, Development and Application to Waste Management Facilities (CRAFT). This report documents discussions and outcomes from the first plenary meeting of the International CRAFT Project.
Introduction
The first plenary meeting of the International CRAFT Project was held between 9 and 13 May 2011 at the IAEA’s Headquarters in Vienna, Austria. The meeting was attended by over 30 specialists from 23 countries and was chaired by Mr Christopher Fisher (UK) with Mr Frederic Ledroit (France) co-chairing. Ms Monika Kinker of the IAEA Waste and Environmental Safety Section was the Scientific Secretariat for the meeting. The main objectives of the CRAFT Plenary Meeting were to: ? Develop the Terms of Reference for the CRAFT Project (development of complimentary safety reports illustrating the application of DS284 to predisposal radioactive waste management facilities); Review the outcomes of the SADRWMS project (Methodology Report, SAFRAN software tool); Review the results of the SADRWMS test cases (TINT and Studsvik); Discuss the use of existing national facilities as application cases in support of CRAFT project activities.
? ? ?
The meeting was conducted according to the agenda which can be found in the CRAFT fileshare site (http://ns-files.iaea.org/fileshare/amer/default.asp?ac=3&fd=453). The meeting was opened by Mr. Magnus Vesterlind of the IAEA, who welcomed the participants and emphasised the importance of the CRAFT Project to the IAEA. Predisposal radioactive waste management covers a broad area with multiple types of facilities, activities, and waste arisings, and the application cases supported by the CRAFT Project will provide valuable feedback on the application of DS284.
Participants
E Piumetti (Argentina), G Williams (Australia), J Walker (Canada), D Trifunovic (Croatia), R Gil Castillo (Cuba), K Jindrich (Czech Republic), F Ledroit (France), G Nabakhtiani (Georgia), C Drobniewski (Germany), U Oppermann (Germany), G Bruno (IAEA, Unit Head - Radioactive Waste and Spent Fuel Management), M Kinker (IAEA Scientific Secretary), M Vesterlind (IAEA, Section Head - Waste and Environmental Safety), J Jafari (Iran), R Jafarian (Iran), SN Lim (Republic of Korea), V Ragaisis
2
(Lithuania), A Rehman (Pakistan), O Nicule (Romania), N Anisimov (Russia), A Guskov (Russia), E Shevtsova (Russia), A Smetnik (Russia), A Tkachenko (Russia), Q Al-Jaseem (Saudi Arabia), J Raicevic (Serbia), P Salzer (Slovakia), D Mphahlele (South Africa), R Avila Moreno (Sweden), D Hofman (Sweden), T Huutoniemi (Sweden), S Skoog (Sweden), N Ya-anant (Thailand), N Luwalira (Uganda), N Blundell (UK), C Fisher (UK).
Meeting Record
Copies of all presentations, information papers and working papers for the meeting can be found at (http://ns-files.iaea.org/fileshare/amer/default.asp?ac=3&fd=453).
Presentations: A number of presentations were delivered during the plenary. These included: ? ? ? ? ? ? ? ? ? Scientific Secretariat Ms. Monika Kinker on the status of the IAEA safety requirements and relation of DS284 to the CRAFT Project SADRWMS Chair Mr. Geoff Williams of Australia on the Initial objectives and activities of the SADRWMS project by the SAFRAN software tool developer Mr. Rodolfo Avila Moreno of Facilia on the outcome of the SADRWMS Project (methodology and SAFRAN tool Mr. Dmytro Hofman of Facilia on the SAFRAN website and forum Mr. Frederic Ledroit of France on the SAFRAN steering group Ms. Nanthavan Ya-anant of Thailand on the results of the Thailand Institute of Nuclear Technology (TINT) test case Mr. Tommi Huutoniemi and Ms. Sofie Skoog of Sweden on the results of the Studsvik test case Mr. Susanta Samanta of the IAEA Waste Technology Section on a generic modular design of processing and storage facilities for small volumes of low level and intermediate level radioactive waste and disused sealed radioactive sources Mr. John Kinker of the IAEA Waste Technology Section on the IAEA Net Enabled Waste Management Database the importance of General Safety Requirements Parts 4 and 5, as well as DS284 to the CRAFT Project; the success of the SADRWMS project in illustrating the application of the methodology described in DS284 and the use of the SAFRAN tool; the outcomes and benefits reported by the TINT and Studsvik test cases; the importance of the SAFRAN steering group to the development of the SAFRAN tool; The implications of relying solely on generic models and data:
Key points raised in the presentations were: ? ? ? ? ?
3
?
? ? ?
? Important when facilities have limited access to relevant facility- or sitespecific data. ? Agreement that models which make use of generic data which is not sitespecific should be conservative. ? Risk that novice users may misinterpret models and parameters the benefits of the host country/organization for test cases - in the particular case of the TINT facility they now have a clear and transparent record which can be used for documenting their safety case and for discussions with the regulatory authority; whether disposal drives, or is driven by the safety case for a predisposal facility; the benefits of considering clearance when developing a predisposal radioactive waste management project; Whilst NEWMDB collects data from about 40 countries and covers about 90% of the wastes produced by the NPPs across the world, it generally does not allow for the association of waste volumes with specific facilities necessary for a safety assessment.
Identification of CRAFT working groups: The participants were invited to provide the plenary meeting with information on waste management in their countries. Mr Blundell of the UK made a presentation on the Waste And Source matter Analysis (WASAN) methodology being applied across sites in the UK. Mr Castillo of Cuba presented a possible application case to the group for a small facility dealing with sealed sources such as smoke detectors, etc. It was also suggested that there would be benefit in translating SAFRAN into Spanish. Mr G Nabakhtiani of Georgia provided a verbal briefing on a centralised waste storage facility whose waste mostly originating from reactors and disused sources, and proposed to use the SAFRAN tool to help the development of their safety assessment. Using this information the plenary then identified a number of work areas where they saw a need to develop further guidance in illustrating the application of the DS284 methodology and the SAFRAN software tool. Subsequently three working groups were identified, these included: ? ? ? processing facilities; long term storage facilities; and existing storage facilities.
A fourth working group was established to finalise the reports associated with the SADRWMS project. A further working group was suggested on the operation of a disposal site. It was agreed that this would be addressed at a subsequent CRAFT meeting.
4
Outcomes of the SADRWMS Project SAFRAN Software Tool: The TINT and Studsvik test cases concluded that the SAFRAN tool successfully implements the methodology in DS284 chapter 5, but highlighted the importance of model validation and verification, especially when there is a lack of relevant (e.g., site- or facility- specific) data. In the future the CRAFT project will need to look at both aspects. It was agreed that in the next plenary there will be a regulators working group whose role will include to look at validation of the data entered and modelling approaches used. The SAFRAN software tool is available on the SAFRAN website, which contains the latest version of the SAFRAN software tool and associated SAFRAN User’s Guide and Tutorial. The CRAFT Project will require a User’s Forum which contains all of the documents and applications supporting the use of SAFRAN and provides for sharing of information. The SAFRAN website is currently maintained by the software developer Facilia. It was noted by the participants that the SAFRAN tool is a valuable screening tool, but that for more complex facilities it should be complemented with other models and software tools, and using site specific data. The meeting noted that the Studsvik test case work was performed against an older version of SAFRAN, and that more work would be required to make the Studsvik file compatible with the current version of the SAFRAN tool. On Wednesday afternoon Mr Dmitry Hofmam provided training on the SAFRAN tool, which the majority of the participants attended. The training made use of the tutorials which are included in the SAFRAN webpage. SADRWMS Methodology Report: Mr Avila of Facilia and Mr Ragaisis of Lithuania presented the SADRWMS methodology report, which documents the SADRWMS methodology and its implementation in the SAFRAN Tool. The report is also provided with two Annexes that describe the calculations and parameters used in the tool. Work was done during the week to re-structure the text and to complete the discussion on calculations and parameters. TINT Test Case Report: Frederic presented the TINT test case report, which documents the application of the DS284 methodology and the SAFRAN tool on the TINT Radioactive Waste Management Facility. This test case was performed with particular emphasis on investigating the application of the DS284 methodology and the use of the SAFRAN Tool in developing a safety case for facilities like TINT. Work was necessary during the week to make sure that the SAFRAN tool and the report are consistent, specifically the Report Module, to fix discrepancies previously highlighted, and to take into account comments from previous reviews of the document. STUDSVIK Test Case Report: Ms. Sofie Skoog of Sweden presented the Studvik test case report. This test case was performed with particular emphasis on reviewing the SAFRAN software as an implementation of the methodology outlined in DS284 and comparing Studsvik’s dose coefficients against the default values provided in the SAFRAN Tool. Work was performed during the week to finalize the document for publication on the CRAFT web folder.
5
Application of DS284 to Long Term Storage Facilities The focus of this group was on those facilities which are intended to have an extended design life of the wastes and structures, i.e. beyond 50 years. This concept involves a period of time which may exceed the normal design life of civil structures. The scope of this working group included both new facilities and the issues which would need to be addressed during design, and existing facilities in which the expected timeframe was not necessarily considered during its design. There were a number of themes that kept repeating throughout the document, for example security and records management. A future meeting will need to look at how to address these themes. One unusual aspect of long term storage facilities is the greater emphasis on the socioeconomic relationship of the facility and safety. Application of DS284 to Existing Storage Facilities The focus of this group was on facilities which may not meet current regulatory standards or may have degraded safety functions. For these types of facilities, the role of the safety case and supporting safety assessment is necessary for assessing and demonstrating continued safe operating conditions and the potential impact of changing regulatory standards. The scope of this working group included periods of emplacement and post emplacement but exclude decommissioning activities. It also considered extension of the conditions in the licence for the existing storage facilities. The group noted that Figure 5 of the SADRWMS methodology is challenging for the older storage facilities as it doesn’t easily allow an upgrade of the facility. To do this the flowchart would have to direct the user back to Figure 2 of the methodology. The group also noted that an application case for a Radon facility would be a good representation of this type of application. The particular facility discussed is being studied as a location for additional waste storage. Application of DS284 to Waste Processing Facilities The focus of this group was on facilities used to process radioactive waste, including operations that extend from the arising to the disposal/storage and including liquid and solid waste and gaseous wastes prior to facility discharge. Improvements were identified for the charts produced by SADRWMS. The group noted that the need to look at the links between the safety case for unit operations and for larger facilities which are operated for other purposes (e.g., nuclear power plants). The group identified that some of the limitations placed on the guidance they had produced was, in part, due to their experience. In the future the IAEA may wish to consider encouraging input from small users, such as hospitals. For an application case it
6
would be useful to look at a facility dealing with several different types of waste arisings and processes.
Generic issues During the week the three working groups collaborated on a review of their application cases and identified a number of general points relevant to all three applications. During the final plenary the following general points were also noted: ? ? ? ? ? Waste acceptance criteria between the various generators and predisposal and disposal radioactive waste management facilities and regulatory limits are critical to the process of waste management Record keeping was considered to be a critical component and it was recognised that maintenance of records from generation through the expected periods of long term storage may not yet have a solution It should be recognised that regulatory expectations may not follow the logic presented in DS284 There is a need to look at more discussion on the use of models, i.e. process flowcharts, product development, etc. Concerns were expressed with using existing national facilities as test cases
Meeting Outcomes and Future Activities
The plenary agreed that this first plenary meeting of the CRAFT project was a success. It was agreed that the working groups would continue to consider their areas using the forum for correspondence. The IAEA will work with those countries that had shown an interest in hosting an application case. These include Cuba, Georgia, Russia and Australia. The next plenary meeting of the project will be in 2Q 2012. It will continue to build on the work started in this first plenary meeting, looking to address: ? ? ? regulatory review and verification of data; generic issues, including the use of models; and progress on the safety report and the application cases.
7
doc_139303808.pdf