Numerical investigations on power ramping procedure for a natural circulation boiling water reactor

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dc.contributor.author Pandey, Manmohan
dc.contributor.author Lakshmanan, S. P.
dc.contributor.other Proceeding of 13th international topical meeting on Nuclear reactor thermal hydraulics (NURETH-13)
dc.coverage.spatial Kanazawa, Japan
dc.date.accessioned 2014-03-15T09:33:43Z
dc.date.available 2014-03-15T09:33:43Z
dc.date.issued 2010-04
dc.identifier.citation Lakshmanan, S. P. and Pandey, M., “Numerical investigations on power ramping procedure for a natural circulation boiling water reactor”, Nuclear Engineering and Design, DOI: 10.1016/j.nucengdes.2009.12.011, vol. 240, no. 4, pp. 860-867, Apr. 2010. en_US
dc.identifier.issn 0029-5493
dc.identifier.uri http://dx.doi.org/10.1016/j.nucengdes.2009.12.011
dc.identifier.uri https://repository.iitgn.ac.in/handle/123456789/715
dc.description.abstract Startup of a natural circulation boiling water reactor (NCBWR) is studied numerically, using a thermal-hydraulic system code RELAP5. A number of numerical experiments are carried out using various power ramps, and a suitable heat-up rate is identified to pressurize the reactor to the desired operating conditions in a reasonable time without considerable void generation in the core. It is observed that the occurrence of flashing in the riser section is unavoidable. Although flashing helps in steam production, the amplitude of flow oscillations induced by flashing is the event of concern, as in the case of the pressure tube type NCBWR studied here. Therefore, the feasibility of a complete single-phase startup is also examined and found not attractive. A new startup procedure, which completely bypasses the unstable two-phase region, is conceptualized, and the method to take the system to the operating condition without encountering flow oscillations is numerically investigated. en_US
dc.description.statementofresponsibility by S.P. Lakshmanan and Manmohan Pandey
dc.description.statementofresponsibility by S. P. Lakshmanan and Manmohan Pandey
dc.format.extent Vol. 240, No. 4, pp. 860-867
dc.language.iso en en_US
dc.publisher Elsevier en_US
dc.subject Boiling water reactor en_US
dc.subject NCBWR en_US
dc.subject Power ramping en_US
dc.title Numerical investigations on power ramping procedure for a natural circulation boiling water reactor en_US
dc.type Article en_US
dc.relation.journal Nuclear Engineering and Design


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