Page 147 - AERB

Procedure, Modelling of Emergency Mitigating organisations to perform investigations and research to
Equipment and Severe Accident Management Guidelines enhance the safety and economic cooperation in VVER
actions, Uncertainty / Sensitivity/ importance analyses type reactors.
methods and End states definition and Release category
definitions. Computer code(s) used for simulation of the 10.2.2 IRRS Mission
severe accident sequences and Off-Site Consequence The IAEA Integrated Regulatory Review Service
Analysis.
(IRRS) is designed to strengthen and enhance the
The position papers on Plant Damage States for effectiveness of the national regulatory infrastructure of
Level-2 PSA and Offsite Consequence Analysis were the States (Countries) for nuclear, radiation, radioactive
prepared based on responses from CPWG member waste and transport safety. The intention is to peer-
countries. AERB officials contributed in the preparation review the regulatory framework of the host country
of IAEA TECDOC on ‘Level-2 PSA Practices for Nuclear so as to make it a robust regulatory body with respect
Power Plants with CANDU Type Reactors’. to all its regulated facilities and activities. The review
is carried out against the IAEA Safety Standards and
10.1.4 IAEA Coordinated Research Project (CRP) on Requirements.
Multi-unit PSA
(i) AERB to Host IRRS Follow-up Mission
nd
The 2 Research Coordination Meeting under the
Government of India has made a request to
IAEA CRP on PSA Benchmark for Multi-Unit/Multi- International Atomic Energy Agency (IAEA) to
Reactor sites was held at IAEA, Vienna during June undertake an IRRS follow up mission for peer review of
18-21, 2019 with an objective to share information India’s regulatory framework for nuclear and radiation
and obtain feedback on the methodology of multi-unit
PSA developed and demonstrated with a benchmark safety. Based on the request, the IAEA has scheduled
site by each member state. AERB expert contributed in IRRS follow up mission around November 2020, with
the preparatory meeting in June 2020. Earlier AERB
reporting the following activities accomplished as part of hosted the IRRS Mission, the first ever international peer
the first-year progress:
review of AERB by a team of IAEA during March 16-
• Multi-unit PSA model incorporating dependencies 27, 2015 for peer review of India’s legal and regulatory
in an integrated manner framework for safety regulation of nuclear power plants
and projects. For the follow-up mission, India requested
• Identification of Multi-unit initiating events IAEA to extend the scope by including the ‘Radiation
Source Facilities and Activities’ as an additional area of
• Amalgamation of event sequences of multi-units in review.
single event tree
(ii) Participation in IRRS Mission of other
• Modelling of event tree sequences of each unit into Countries
multi-unit sequences.
One AERB officer participated as member of IAEA
10.2 MULTILATERAL INTERNATIONAL COOPERATION IRRS mission of the United Kingdom (UK) conducted

during October 13- 25, 2019. The team comprised

10.2.1 AERB Joined as Member of AER, Hungary of 18 members from different countries and IAEA, to
AERB joined the Atomic Energy Research review various aspects of regulatory functions of the
(AER), Hungary as member organisation. AER is an host country.
international community of researchers, engineers and AERB expert reviewed the core IRRS Modules
operators from countries running the VVER type nuclear comprising of Safety Review, Authorisations, Regulatory
reactors (the type of reactors in Kudankulam). The Inspections, Safety Documents and Enforcement in
objective of AER is to promote information exchange the domain of Exposures to Public. The scope of the
among VVER utility staff, Designers, R&D institutes mission covered both Nuclear Fuel Cycle Facilities and
and Safety authorities. The AER also assists its member radiation sources.

AERB Annual Report 2019 119