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research-article

Experimental Demonstration of AHWR Safety during Prolonged Station Black Out (SBO)

[+] Author and Article Information
Mukesh Kumar Dhiman

Reactor Engineering Division Reactor Design and Development Group, Bhabha Atomic Research Centre Trombay, Mumbai 400 085, India
mukeshd@barc.gov.in

Purnendra K. Verma

Reactor Engineering Division Reactor Design and Development Group, Bhabha Atomic Research Centre Trombay, Mumbai 400 085, India
pkverma@barc.gov.in

Arun K. Nayak

Reactor Engineering Division Reactor Design and Development Group, Bhabha Atomic Research Centre Trombay, Mumbai 400 085, India
arunths@barc.gov.in

A. Rama Rao

Reactor Engineering Division Reactor Design and Development Group, Bhabha Atomic Research Centre Trombay, Mumbai 400 085, India
arr@barc.gov.in

1Corresponding author.

ASME doi:10.1115/1.4037031 History: Received February 01, 2017; Revised June 02, 2017

Abstract

Fukushima accident has raised a strong concern and apprehension about the safety of a nuclear reactor failing to remove the decay heat following an extreme event. After Fukushima accident, the reactor designers worldwide analyzed the safety margin of the existing and new generation nuclear power plants for such an event. AHWR, designed in India, was also analyzed for even more severe conditions than occurred at Fukushima. AHWR equipped with several passive systems showed its robustness against this type of scenarios. However, few new passive systems were incorporated in AHWR design for maintaining the integrity of the reactor at least for 7 days as a grace period. Passive moderator cooling system and passive endshield cooling system were among the newly introduced safety system in AHWR. An experimental test facility simulating the prolonged SBO case in AHWR has been designed and built. Experiments have been performed in the test facility for simulated conditions of prolonged SBO. The current study shows the performance behavior of AHWR during prolonged SBO case through simulation in its integral test facility. The results indicate that AHWR design is capable of removing decay heat for prolonged period without operator interference.

Copyright (c) 2017 by ASME
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