Detection of loss of coolant accident (LOCA) and generation of reactor trip signal for shutting down the reactor is very important for safety of a nuclear reactor. Large break LOCA (LBLOCA) is a typical design basis accident in all reactors and has attracted attention of the reactor designers. However, studies reveal that small break loss of coolant accident (SBLOCA) can be more severe as it is difficult to detect with conventional methods to generate reactor trip. SBLOCA in channel-type reactors is essential to consider as it may create stagnation channel conditions in the reactor coolant channel, which may lead to fuel failure, if the reactor is not tripped. Advanced heavy water reactor (AHWR) is a channel-type boiling water reactor, which may experience stagnation channel conditions in case of SBLOCA in feeder pipes. For initiating the trip signals and safe shut down of the reactor in such cases, a novel system comprising of acoustic-based sensors is incorporated in the reactor design. The system detects the peculiar sound of the steam leaked from the main heat transport system (MHTS) and generates reactor trip signal. The experimental demonstration of such new system is essential before its introduction in the reactor. The experimental demonstration of the stagnation channel break, its detection by acoustic-based sensors system, and reactor trip followed by generation of reactor trip signal was performed and presented in the paper. The experiment showed that the trip signal for AHWR can be generated within 5 s with acoustic sensor and 2 s by low flow signal and reactor trip can be ensured in 7 s following a LOCA.
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April 2018
Research-Article
Experimental Demonstration of Safety of AHWR during Stagnation Channel Break Condition in an Integral Test Loop
Mukesh Kumar,
Mukesh Kumar
Reactor Engineering Division,
Reactor Design and Development Group,
Bhabha Atomic Research Centre Trombay,
Mumbai 400 085, India
e-mail: mukeshd@barc.gov.in
Reactor Design and Development Group,
Bhabha Atomic Research Centre Trombay,
Mumbai 400 085, India
e-mail: mukeshd@barc.gov.in
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A. K. Nayak,
A. K. Nayak
Reactor Engineering Division,
Reactor Design and Development Group,
Bhabha Atomic Research Centre Trombay,
Mumbai 400 085, India
Reactor Design and Development Group,
Bhabha Atomic Research Centre Trombay,
Mumbai 400 085, India
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Sumit V. Prasad,
Sumit V. Prasad
Reactor Engineering Division,
Reactor Design and Development Group,
Bhabha Atomic Research Centre Trombay,
Mumbai 400 085, India
Reactor Design and Development Group,
Bhabha Atomic Research Centre Trombay,
Mumbai 400 085, India
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P. K. Verma,
P. K. Verma
Reactor Engineering Division,
Reactor Design and Development Group,
Bhabha Atomic Research Centre Trombay,
Mumbai 400 085, India
Reactor Design and Development Group,
Bhabha Atomic Research Centre Trombay,
Mumbai 400 085, India
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R. K. Singh,
R. K. Singh
Reactor Engineering Division,
Reactor Design and Development Group,
Bhabha Atomic Research Centre Trombay,
Mumbai 400 085, India
Reactor Design and Development Group,
Bhabha Atomic Research Centre Trombay,
Mumbai 400 085, India
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Vikas Jain,
Vikas Jain
Reactor Engineering Division,
Reactor Design and Development Group,
Bhabha Atomic Research Centre Trombay,
Mumbai 400 085, India
Reactor Design and Development Group,
Bhabha Atomic Research Centre Trombay,
Mumbai 400 085, India
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D. K. Chandraker
D. K. Chandraker
Reactor Engineering Division,
Reactor Design and Development Group,
Bhabha Atomic Research Centre Trombay,
Mumbai 400 085, India
Reactor Design and Development Group,
Bhabha Atomic Research Centre Trombay,
Mumbai 400 085, India
Search for other works by this author on:
Mukesh Kumar
Reactor Engineering Division,
Reactor Design and Development Group,
Bhabha Atomic Research Centre Trombay,
Mumbai 400 085, India
e-mail: mukeshd@barc.gov.in
Reactor Design and Development Group,
Bhabha Atomic Research Centre Trombay,
Mumbai 400 085, India
e-mail: mukeshd@barc.gov.in
A. K. Nayak
Reactor Engineering Division,
Reactor Design and Development Group,
Bhabha Atomic Research Centre Trombay,
Mumbai 400 085, India
Reactor Design and Development Group,
Bhabha Atomic Research Centre Trombay,
Mumbai 400 085, India
Sumit V. Prasad
Reactor Engineering Division,
Reactor Design and Development Group,
Bhabha Atomic Research Centre Trombay,
Mumbai 400 085, India
Reactor Design and Development Group,
Bhabha Atomic Research Centre Trombay,
Mumbai 400 085, India
P. K. Verma
Reactor Engineering Division,
Reactor Design and Development Group,
Bhabha Atomic Research Centre Trombay,
Mumbai 400 085, India
Reactor Design and Development Group,
Bhabha Atomic Research Centre Trombay,
Mumbai 400 085, India
R. K. Singh
Reactor Engineering Division,
Reactor Design and Development Group,
Bhabha Atomic Research Centre Trombay,
Mumbai 400 085, India
Reactor Design and Development Group,
Bhabha Atomic Research Centre Trombay,
Mumbai 400 085, India
Vikas Jain
Reactor Engineering Division,
Reactor Design and Development Group,
Bhabha Atomic Research Centre Trombay,
Mumbai 400 085, India
Reactor Design and Development Group,
Bhabha Atomic Research Centre Trombay,
Mumbai 400 085, India
D. K. Chandraker
Reactor Engineering Division,
Reactor Design and Development Group,
Bhabha Atomic Research Centre Trombay,
Mumbai 400 085, India
Reactor Design and Development Group,
Bhabha Atomic Research Centre Trombay,
Mumbai 400 085, India
1Corresponding author.
Manuscript received May 16, 2017; final manuscript received December 6, 2017; published online March 5, 2018. Assoc. Editor: Jovica R. Riznic.
ASME J of Nuclear Rad Sci. Apr 2018, 4(2): 021005 (6 pages)
Published Online: March 5, 2018
Article history
Received:
May 16, 2017
Revised:
December 6, 2017
Citation
Kumar, M., Nayak, A. K., Prasad, S. V., Verma, P. K., Singh, R. K., Jain, V., and Chandraker, D. K. (March 5, 2018). "Experimental Demonstration of Safety of AHWR during Stagnation Channel Break Condition in an Integral Test Loop." ASME. ASME J of Nuclear Rad Sci. April 2018; 4(2): 021005. https://doi.org/10.1115/1.4038899
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