Liquid affected spectral shift reactor

Details Liquid affected spectral shift reactor Liquid affected spectral shift reactor

1991-10-10

1993-02-09

Walsh, Donald P.

Induced nuclear reactions: processes, systems, and elements

With control of reactor

By movement of control element or by release of neutron...

376220, 376209, G21C 700

Patent

active

051851202

ABSTRACT:
A method for affecting neutron spectral shift in a reactor core includes providing a liquid poison in a hollow control blade extending into the core, displacing the liquid poison with a first fluid for obtaining a hard neutron spectra during a beginning interval of the core fuel cycle for converting fuel, and then increasing moderating ratio for obtaining a soft neutron spectra during an end interval of the cycle for burning the converted fuel. An exemplary apparatus for practicing the method displaces the liquid poison in the control blade with the first fluid for obtaining the hard neutron spectra. The first fluid may be either replaced, displaced, or added to by a second fluid having a second moderating ratio for obtaining the soft neutron spectra.

REFERENCES:
patent: 3227619 (1966-01-01), Plante
patent: 3251746 (1966-05-01), Jeffries et al.
patent: 3261755 (1966-07-01), Mostert
patent: 3860482 (1975-01-01), Wheelock
patent: 4664878 (1987-05-01), Wilson et al.
Wilkins et al, Advanced BWR: Design Improvements Build on Proven Technology, Nuclear Engineering International, reprint Jun. 1986, pp. 1-7 and drawing entitled "The World's Reactors No. 89".

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