NDLI: Evaluation of operator actions for beyond design basis events for AHWR

Content Provider	IEEE Xplore Digital Library
Author	Kumar, M. Mukhopadhyay, D. Lele, H.G. Vaze, K.K.
Copyright Year	2010
Description	Author affiliation: Reactor Safety Division, Bhabha Atomic Research Centre, Mumbai 400 085, India (Kumar, M.; Mukhopadhyay, D.; Lele, H.G.; Vaze, K.K.)
Abstract	Enhanced defence-in-depth is incorporated in the proposed Advanced Heavy Water Reactor (AHWR) as a part of their fundamental safety approach to ensure that the levels of protection in defence-in-depth shall be more independent from each other than in existing installation. Safety is enhanced by incorporating into their designs, increased emphasis on inherently safe characteristics and passive systems as a part of their fundamental safety approach. It is ensured that the risk from radiation exposures to workers, the public and the environment during construction/commissioning, operation, and decommissioning, shall be comparable to that of other industrial facilities used for similar purposes. This implies that there will be no need for relocation or evacuation measures outside the plant site, apart from those generic emergency measures developed for any industrial facility. It has been demonstrated by analyses that there is no core damage for PIEs with frequencies more than $10-^{10}/year.$ However some scenarios in residual risk domain are considered to demonstrate that dose at plant boundary is within prescribed acceptable limit. It is also possible to arrest core damage progression at various stages of event progression, by incorporating certain operating procedures, without any release. This paper discusses analyses of such low frequency event with multiple failure under the category of “Decrease in MHT inventory” where plant related symptoms like channel exit temperature, channel component temperatures, moderator level with respect to time are quantified. Further analyses are carried out for these events to demonstrate the effectiveness of action plan like flooding of the cavity of the containment.
Starting Page	579
Ending Page	582
File Size	810743
Page Count	4
File Format	PDF
ISBN	9781424483440
e-ISBN	9781424483433
DOI	10.1109/ICRESH.2010.5779614
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-12-14
Publisher Place	India
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Moderator Boil-off Operator action Defence-in-depth Heating Loss of Inventory Ear Beyond Design Basis Events Fuel Heat up
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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