Radial nodalization effects on BWR stability calculations
Description
Computer simulations have shown that stability calculations in boiling water reactors (BWRs) are very sensitive to a number of input parameters and modeling assumptions. In particular, the number of thermohydraulic regions (i.e., channels) used in the calculation can affect the results of decay ratio calculations by as much as 30%. This paper presents the background theory behind the observed effects of radial nodalization in BWR stability calculations. The theory of how a radial power distribution can be simulated in time or frequency domain codes by using representative thermohydraulic regions is developed. The approximations involved in this method of solution are reviewed, and some examples of the effect of radial nodalization are presented based on LAPUR code solutions
Additional details
Publishing Information
- Imprint Title
- Proceedings of the International Workshop on Boiling Water Reactor Stability
- Imprint Pagination
- 548 p.
- Journal Page Range
- p. 232-240.
- Report number
- CSNI-R--178
Conference
- Title
- International Workshop on Boiling Water Reactor Stability.
- Dates
- 17-19 Oct 1990.
- Place
- Brookhaven, NY (USA).
INIS
- Country of Publication
- Nuclear Energy Agency of the OECD (NEA)
- Country of Input or Organization
- Nuclear Energy Agency of the OECD (NEA)
- INIS RN
- 22063730
- Subject category
- S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- BWR TYPE REACTORS; FEEDBACK; FLUID FLOW; L CODES; NODAL EXPANSION METHOD; REACTOR STABILITY
- Descriptors DEC
- COMPUTER CODES; ENRICHED URANIUM REACTORS; POWER REACTORS; REACTORS; STABILITY; THERMAL REACTORS; WATER COOLED REACTORS; WATER MODERATED REACTORS