ITER contribution to:

• IAEA Safety Reports Series n° 86  “Safety Aspects of NPP in Human Induced External Events:  General Consideration – issued in 2017. This Report gives the general framework of methods to be implemented for the design and evaluation of nuclear facilities subjected to extreme human induced external events.
   
• IAEA Safety Reports Series n° 88  “Safety Aspects of NPP in Human Induced External Events:  Margin Assessment – issued in 2017. The objective of this safety Report is to provide detailed methodology and procedures for assessing the safety margins of nuclear power plants against human induced events of either the postulated type or accidental type.

 

ITER contribution to:

• TEC DOC on “Technical and Scientific Support Organizations (TSOs) and their Services provided in Support to Regulatory Functions”, Final Draft (February 2017)

The TEC DOC is intended to report on general characteristics, organizational aspects and types of services provided by TSOs to support regulatory functions in the Member States.
This document will serve as a reference publication on TSOs. It will help to develop convergent understandings on the matter at international level. It covers all types of support for safety issues that may be provided to a Regulatory Body to carry out its statutory functions, which require technical and scientific expertise in the nuclear and radiation protection field. The support is applicable to all facilities and activities, for civilian use, that give rise to radiation risks as defined in IAEA Safety Standard Fundamental Safety Principles, Safety Fundamentals No. SF-1. Currently this TEC DOC is ready in its Final Draft.

                                                        

ITER contribution to:

• Safety Guides Working DS472 – “Organization, Management and Staffing of a Regulatory Body”, draft 2015

This Safety Guide covers the organizational and managerial aspects of Regulatory Bodies, which are of fundamental importance for the performance of the regulatory core functions in all circumstances, thus promoting a more consistent approach to organizational aspects and to resources management. This will allow the Regulatory Body to have an integrated and overall view of facilities and activities. In particular, this is to be ensured not only by the technical dimensions, but also by the cultural, organizational and individual aspects (Human and Organizational Factors), supporting strong regulatory effectiveness, supplemented by a questioning attitude and self-reflection on its own culture and on the influences on the authorized parties.
The scope of this Safety Guide is limited to the regulation of radiation and nuclear safety and does not extend to nuclear security. However, it does identify where security measures are relevant for safety purposes.

 

ITER contribution to:

• Safety Guides Working DS473– “Regulatory Body Functions and Processes “, draft 2015

The Safety Guide covers the core regulatory functions, and how they are discharged, during all the phases of the lifecycle of a facility or activity from initial design through to the release from regulatory control by means of associated licensing processes. However, in line with the graded approach, the regulatory control and recommendations described will not be applicable to all facilities and activities and will differ according to the lifecycle stage: even where applicable, the depth and scope will vary.

The scope of this Safety Guide is limited to the regulation of radiation and nuclear safety and does not extend to nuclear security. However, it does identify where security measures are relevant for safety purposes.

                                                                     

 

ITER contribution to:

• TECDOC on “Safety Communication on Siting of Nuclear Facilities against External Hazards”, draft 2014

The document provides on how to establish an effective communication, which contributes to support the shift from one way to two way, interactive and long-term process of communication with the public as well as it provides information about the measures taken by nuclear energy stakeholders of a nuclear national programme to ensure the safety of the public and the environment, while harnessing the benefits of nuclear power (risk-benefit evaluation).
Moreover, a risk communication approach identifies the public concerns; and addresses these concerns, emotions and reactions to work with the media by answering their demands and provide information in a non- technical language. It also identifies all stakeholders and affected parties and calls for keeping them informed about the safety of nuclear facilities, the regulatory control activities and related findings. Moreover, the risk communication approach assists in building a bridge between technical experts and the public and maintain social confidence ensuring transparency and to facilitate the decision making process by clear, timely, factual and continuous information to the public.

 

ITER contribution to:

• General Safety Guide n° GSG 4  on:“Use of External Experts by the Regulatory Body”. Published in 2013

This Safety Guide provides recommendations and guidance on meeting the requirements of IAEA Safety Standards Series No. GSR Part 1 on obtaining expert advice or services for the regulatory body.
It informs the regulatory body on the process it should use to determine the need for external expert advice, and the processes and procedures for identifying a suitable support provider and making contractual arrangements for the work. It also provides recommendations and guidance on how the regulatory body should take the advice of external experts into account while still retaining responsibility in making its decisions.

 

ITER contribution to:

• Safety Report on “Assessment Of External Flooding (Excluding Tsunami) And High Wind Hazards In Site Evaluation For Nuclear Installations – 2014

The objective of the Safety Report is to detail the state of the art methodologies and provide recent case studies that will be used for the evaluation of meteorological and hydrological hazards as the supporting document of SSG-18.
The scope of the Safety Report is the assessment of external flooding (excluding tsunami) and high wind hazards for the purposes of site evaluation for existing and prospective nuclear installations.
The covered aspects for the evaluation of external flooding (excluding tsunami) and high wind hazards.

 

ITER contribution to:

• Safety Report on “External Hazard Considerations For Single And Multi-Unit Probabilistic Safety Assessment” – 2014

The objective of the safety report, External Event Probabilistic Safety Assessment is to outline the generic methodology for probabilistic safety assessment of NPP against external natural hazards, which integrate design, procedural, operational, human factor, and both protection and mitigation aspects that are essential to understand a NPP response to an external hazard.
The methodology would be suitable for PSA of one unit against one hazard. Some aspects of external event PSA such as identification and initial screening of hazards are also applicable to multi-unit sites.

 

ITER contribution to:

• Safety Report “Technical Approach To Multi-Unit Probabilistic Safety Assessment (Mupsa)” – 2014

The scope of the present safety report includes a review of the lessons learned about multi-unit site safety evaluations from existing studies and from operating experience with multi-unit sites. 
The focus of this review is to identify the technical issues that need to be addressed in an integrated site safety evaluation and to propose solutions to these issues that can be derived from the existing work.  An overall approach to performing a site safety evaluation is described as well as detailed guidance on performing the necessary steps to implementing the approach.
The scope of the report includes a definition of the risk metrics that can be used and suggestions for how associated risk acceptance criteria may be developed.

 

ITER contribution to:

• Document - Seismic Probabilistic Safety Assessment Implementation Guideline - 2013

The main purpose of this report is to provide implementation guidance for conducting Seismic Probabilistic Safety Assessment (SPSA) for existing nuclear installations in a manner consistent with IAEA Safety Standard NS-G-2.13 and internationally recognized practice.
The scope of this report covers the SPSA to be performed on existing nuclear power plant so as to ensure that the required basic safety functions are available during and after seismic events that may exceed seismic design basis. 
SPSA should be developed as described in NS-G-2.13 and in accordance with applicable regulatory requirements (such as the requirement for periodic safety review) and observing sound international practice. 
Seismic PSA programmes at existing operating plants are plant specific and regulatory specific. This report is meant to provide practical implementation guidance for internal knowledgeable PSA practitioners in order to develop SPSA on the basis of existing Internal Events PSA. 

 

ITER contribution to:

• Document - Methodologies for Seismic Safety Evaluation of Existing Nuclear Installations - 2013

The scope of this report covers the seismic safety evaluation programmes to be performed on existing nuclear installations so as to ensure that the required basic safety functions are available, with particular application to the safe shutdown of reactors. Nuclear Installations, according to IAEA Glossary, include:

• Land based, stationary nuclear power plantsand research reactors; 

• Nuclear fuel cycle facilities, including but not limited to enrichment plants, processing plants, independent spent fuel storage facilities and reprocessing plants.

Seismic safety evaluation programmes should be developed as described in NS-G-2.13 and in accordance with applicable regulatory requirements (such as the requirement for periodic safety review).
Evaluation programmes at existing operating plants are plant specific or regulatory specific.
This report is meant to define the minimum generic requirements and may need to be supplemented on a plant specific basis to consider particular aspects of the original design basis.

 

ITER contribution to:

• Document - Draft Technical Report on Seismic isolation of nuclear installations - 2013
The objective of this TECDOC is to:

• Provide technical basis to revise safety guides for new design and re-evaluation of operating facilities in order to include seismic isolation
   
• Assemble technical basis to cover design, risk or margin evaluation, manufacture, construction and operation activities
   
• Propose basic requirements for base-isolated structures focusing on design, seismic risk assessment, construction and operation.

 

ITER contribution to:

• IAEA Safety Reports Series DD1139 “Safety Aspects of NPP against Human Induced External Events:  General Consideration – draft  2013

This Report gives the general framework and it includes a roadmap on how to perform the design and the evaluation of the protection against human induced external hazards.
It concentrates on an overall view of the methodology and on the important conditions in its application to existing and new nuclear power plants.

 

ITER contribution to:

• IAEA Safety Reports Series DD1087 “Engineering Aspects of NPP against Human Induced External Events: Assessment of Structures” – draft 2012

This Report gives detailed guidelines for the safety assessment of NPP structures against mechanical impact, explosion and fire hazards caused by human induced external events. It covers the characterization of loading, the assessment of structural integrity using both simplified methods and more elaborated methodologies, and the assessment of induced vibration. Acceptance criteria are given in the report for different failure modes: overall stability, overall bending and shear, local failure modes and induced vibrations.

 

ITER contribution to:

• IAEA Safety Reports Series DD1086 “Engineering Aspects of NPP against Human Induced External Events: Margin Assessment” – draft 2012

The report describes the procedures for assessing the margins of nuclearpower plants against human induced external hazards. Both postulated and accidental hazards are considered. It focuses on plant and systems performance evaluations.

 

IAEA - International Seismic Safety Centre (ISSC) – KARISMA Benchmark

•        ITER Final report on: ‘’ Seismic Safety Of Existing Nuclear Power Plants, KAshiwazaki-Kariwa Research Initiative for Seismic Margin Assessment’’-  Published in 2012

The report contains the contribution of ITER-Consult to the benchmark, with specific reference to the activities requested in Task 1- Structural benchmark.  Analyses have been developed to study the soil response, using ground motion records provided by Tokyo Electric Power Company (TEPCO). Response spectra have been evaluated at free surface and at specific depths using aftershock and main shock data. Maximum spectral accelerations of about 4.8 g have been calculated during the main shock. 

 

ITER contribution to:

• Specific Safety Guide n° SSG -28 “Commissioning for Nuclear Power Plants” – Draft  in 2012

This Safety Guide deals with the commissioning of land based stationary thermal nuclear power plants of all types. It makes recommendations on how to meet the requirements on the commissioning programme; organization and management; testing and review procedures; and the interfaces between organizations involved in the commissioning activities, including the regulatory body. It also deals with the control of changes in the commissioning programme and with the documentation required for and produced in commissioning.

 

 

This report has been prepared with the aim to provide background information about the Fukushima 1 NPP and report on the main aspects of the accident: the initiator seismic event and consequent tsunami, the evolution of the accident, its management  and  the radiological impact. A number of preliminary considerations are elaborated to contribute to the process to learn from the Fukushima accident.

 

The Specific Safety Guide  NO. SSG-9 “Seismic Hazards in Site Evaluation for Nuclear Installations” has been published by IAEA in October 2010. It provides recommendations and guidance on evaluating seismic hazards at a nuclear installation site and, in particular, on how to determine:

(a) the vibratory ground motion hazards, in order to establish the design basis ground motions and other relevant parameters for both new and existing nuclear installations;

(b) the potential for fault displacement and the rate of fault displacement that could affect the feasibility of the site or the safe operation of the installation at that site.

ITER-Consul has contributed to the preparation of the guide.

 

Publication

It proposes a road-map of 200 safety-related actions to be taken from the beginning of development of the infrastructure up to commissioning of the NPP

The Safety Guide is structured in accordance with the IAEA safety standards and comprises 20 chapters, each of which being linked to IAEA safety requirements with identification of the phase in which the requirement should be implemented and corresponding IAEA Safety Standard.

 

Brochure

Publication