Method and apparatus for measuring the filling level in a reactor pressure vessel of a boiling-water reactor
US4765945A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 25, 1986 |
| Grant date | Aug 23, 1988 |
| Priority date | — |
| Expiry date | Nov 25, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E30/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for measuring the filling level of a liquid in a pressure vessel of a boiling-water reactor, includes measuring the pressure difference between a lower subspace and a reference column, determining steam density in an upper subspace from the measured pressure, determining liquid density in the lower subspace, determining the liquid density in the column, subsequently determining the level in the vessel from the liquid densities in the lower subspace and column, from the steam density in the upper subspace and from the pressure difference and from taking into account time-dependent transient alterations of the values of the densities by measuring the pressure change over time in the upper subspace, the power output and the temperature of the liquid in the vessel, determining therefrom the liquid density in the lower subspace and the steam density in the upper subspace with the measured pressure in the steam space and with known dimensions and quantities, and measuring ambient temperature in the vicinity of the column and determining the liquid density in the column therefrom with known quantities, by using a vertical distance between the bottom of the vessel and a connecting…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.