Control rod for nuclear reactor
US6470061B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 19, 1996 |
| Grant date | Oct 22, 2002 |
| Priority date | — |
| Expiry date | May 23, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E30/30
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The invention relates to a control rod for a boiling water reactor. The control rod comprises a top piece and a bottom piece between which an absorber part is arranged. The absorber part comprises a central part (4) and four absorber blades (3) extending from the central part (4). The absorber part comprises a channel (10) which comprises the central part and which extends along the length of the whole absorber part. The channel is surrounded by walls of a neutron-absorbing material with a long service life, for example hafnium. The channel is at least partially filled with a moderator, for example light water. During the manufacture the absorber part has undergone a heat treatment such that the hafnium alloy has been completely or partially transformed from &agr;-phase to &bgr;-phase and thereafter been rapidly cooled to &agr;-phase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.