Výsledky vyhledávání - "Sunil Nijhawan"

Simulation of Severe Accident Progression Using ROSHNI: A New Integrated Simulation Code for PHWR Severe Accidents

As analysts still grapple with understanding core damage accident progression at Three Mile Island and Fukushima that caught the nuclear industry off-guard once too many times, one notices the very limited detail with which the large reactor cores of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3fcc24f02f929cc71a60d997f3fcc504
https://doi.org/10.1115/1.0000452v

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Unmet Challenges to Successfully Mitigating Severe Accidents in Multi Unit CANDU Reactors

Autor: Sunil Nijhawan

Publikováno v: Volume 1: Beyond Design Basis; Codes and Standards; Computational Fluid Dynamics (CFD); Decontamination and Decommissioning; Nuclear Fuel and Engineering; Nuclear Plant Engineering.

One sees eerie similarities here in Canada to the cozy relationship between regulator and utilities in ‘pre-Fukushima’ Japan. Such ties are hardly limited to Canada though. The chronic degradation of real commitments to continued improvements in

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e729d61616ececb752cacb6cf1d9b6bb
https://doi.org/10.1115/icone2020-16517

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FUELPOOL: A Computer Program to Model CANDU Spent Fuel Pool Severe Accident Progression and Consequences

Autor: Yong Mann Song, Sunil Nijhawan, Jong Yeob Jung

Publikováno v: Volume 1: Beyond Design Basis; Codes and Standards; Computational Fluid Dynamics (CFD); Decontamination and Decommissioning; Nuclear Fuel and Engineering; Nuclear Plant Engineering.

CANDU PHWR spent fuel pools (SFPs), smaller than a tennis court, contain up to 38,000 or more (49,000 in Wolsong)fuel bundles in geometries not replicated in any other power reactor. Therefore, the phenomenological issues, accident progression pathwa

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8736a623e88891449edb581802535077
https://doi.org/10.1115/icone2020-16634

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Regulatory Actions That Hinder Development of Effective Risk Reduction Measures by the Nuclear Industry for Enhanced Severe Accident Prevention and Mitigation Measures After Fukushima

Autor: Sunil Nijhawan

Publikováno v: Volume 2: Smart Grids, Grid Stability, and Offsite and Emergency Power; Advanced and Next Generation Reactors, Fusion Technology; Safety, Security, and Cyber Security; Codes, Standards, Conformity Assessment, Licensing, and Regulatory Issues.

The official report of The Fukushima Nuclear Accident Independent Investigation Commission concluded that “The TEPCO Fukushima Nuclear Power Plant accident was the result of collusion between the government, the regulators and TEPCO, and the lack o

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::656a1abc2cd8e46328095840ea8f85c2
https://doi.org/10.1115/icone24-60700

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Challenges in Multi-Unit CANDU Reactor Severe Accident Mitigation Strategies

Autor: Sunil Nijhawan

Publikováno v: Volume 4: Computational Fluid Dynamics (CFD) and Coupled Codes; Decontamination and Decommissioning, Radiation Protection, Shielding, and Waste Management; Workforce Development, Nuclear Education and Public Acceptance; Mitigation Strategies for Beyond Design Basis Events; Risk Management.

While most of the severe accident related vulnerabilities arising from the inherent 40 odd year old PHWR design are common with single unit CANDU reactors and a number are also shared with LWR designs of that vintage, an evaluation of a station black

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e616934502ea253120e849201923e70e
https://doi.org/10.1115/icone24-60689

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Severe Accident Related Vulnerabilities, Potential Design Enhancements and Opportunities for International Cooperation in Risk Reduction in Pressurized Heavy Water Reactors

Autor: Sunil Nijhawan

Publikováno v: ASME 2015 Nuclear Forum.

Operating CANDU PHWRs present significant challenges with respect to their ability to mitigate accidents that are beyond the envelope of design basis drafted over 40 years ago. Today, consideration of severe accidents is a public as well as a regulat

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6b074b60d1f41d309f385595a4639ec7
https://doi.org/10.1115/nuclrf2015-49574

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Importance of Reactor Heat Transport System Overpressure Protection System Under Severe Accident Conditions With Special Reference to CANDU Reactors

Autor: Sunil Nijhawan

Publikováno v: Volume 5: Fusion Engineering; Student Paper Competition; Design Basis and Beyond Design Basis Events; Simple and Combined Cycles.

After Fukushima, any Station Blackout capability reviews must be carried out with diligence and integrity beyond any reasonable doubt. This is especially true for nuclear reactors that did not consider a sustained loss of AC power and severe accident

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::65fd1cdad53b8dbce8481b3b4c7c0549
https://doi.org/10.1115/icone20-power2012-54301

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Improved Regulatory Oversight and Immediate Retrofits for Operating Pressurized Heavy Water Reactors for Beyond Design Basis Accidents

Autor: Sunil Nijhawan

Publikováno v: Volume 5: Fusion Engineering; Student Paper Competition; Design Basis and Beyond Design Basis Events; Simple and Combined Cycles.

The most painful lessons that engineers will learn from reviews of the Fukushima disaster relates to the unacknowledged failure of regulators, designers and utilities in better retrofitting existing reactors in a timely manner to better withstand and

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::76eb5e46881500f1976526c1266fd21c
https://doi.org/10.1115/icone20-power2012-54387

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