Status: SSG-2 (Rev.1)
Veröffentlichung 2019
Revision von SSG-2 (Ex DS395)
Beteiligte IAEO-Komitees: NUSSC, RASSC, WASSC, EPReSC
Specific Safety Guide
Document Preparation Profile "DPP"
Zurück zu „IAEO Safety Standards Series“ (Übersicht aller derzeit gültigen Sicherheitsstandards)
Background Information
Existing document (SSG-2) was published in 2009, the scope remains essentially unchanged.
The current revision (DS491) was initiated to
- comply with the long term structure of Safety Standards approved in 2008
- provide guidance and recommendations to help meeting Safety Requirements from SSR-2/1 (Rev.1) and GSR Part 4 (Rev.1), both published in 2016
- ensure coherency and consistency with the other relevant IAEA Safety Standards
- incorporate feedback on application of SSG-2, on operating experience through the IAEA Incident Reporting Systems and from the accident at the Fukushima-Daiichi NPP
The new information in DS491 includes
- Separation between basic concepts and specific guidance
- Less statements of explanatory nature and general considerations
- Further guidance to address the main aspects of Deterministic Safety Analysis
- Specific recommendations to meet Safety Requirements
- in all plant states, including Design Extension Conditions
- to support ‘practical elimination’
Other Changes
- Applications of Deterministic Safety Analysis moved to the Annex
- References updated
Fukushima Daiichi Implications
- National regulations adopted after the accident and lessons have been taken into account
- Specific aspects included in all sections, such as
- Section 3. Identification and categorization of postulated initiating events and accident scenarios
- Identification of Design Extension Conditions
- Event sequences and accident scenarios to be ‘practically eliminated’
- Section 7. Deterministic Safety Analysis for plant states and accident scenarios
- DSA for DEC without significant fuel degradation
- DSA for DEC with core melting
- DSA in support of ‘practical elimination’
- Section 3. Identification and categorization of postulated initiating events and accident scenarios