Method of making a metal, neutron absorbing element and the elem

Details Method of making a metal, neutron absorbing element and the elem Method of making a metal, neutron absorbing element and the elem

1989-07-20

1992-06-02

Bentley, Stephen C.

Powder metallurgy processes

Forming articles by uniting randomly associated metal particles

Consolidation of powders

376339, 420422, G21C 724

Patent

active

051184680

ABSTRACT:
The subject of the invention is a method of making a clad metal, neutron absorbing element, and the neutron absorbing element produced by preparing compactable metal products comprising (weight %) HF at least 25%, Zr and/or Zr alloys=0 to 75%; Ti and/or Ti alloys=0 to 75%; Hf-ZR alloys containing <55% Zr=0 to 75%; Hf-Ti alloys containing <55% Ti=0 to 75%; neutron absorbing metal elements melting at over 400.degree. C.: <0.2% and other metal elements melting at over 400.degree. C.: 0 to the balance, the balance being less than 5%; introducing at least some of these products into a metal container with an open end; compressing the products in the container, or compressing them before putting them into the container; if necessary repeating the introduction and compression of the products until the container is at least 95% full; and closing the open end of the container by welding on a metal lid or plug and providing an internal vacuum. The element is used, e.g., as a component of a control arrangement in a nuclear reactor.

REFERENCES:
patent: 3234104 (1966-02-01), Gale et al.
patent: 4259413 (1981-03-01), Taglang et al.
patent: 4566989 (1986-01-01), Radford et al.
Kuwae et al, "Development of Zircaloy Clad Hafnium Rods for BWR Long Life Neutron Absorbers", Journal of Nuclear Science and Technology, vol. 23, No. 2, Feb. 1986, pp. 185-187.

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