Title:
METHOD FOR SAVING FUEL IN HEAVY WATER REACTOR
Document Type and Number:
WIPO Patent Application WO/2019/107733
Kind Code:
A1
Abstract:
The present invention relates to a method for saving fuel in a heavy water reactor and, particularly, to a method for saving nuclear fuel capable of producing cobalt-60 while suppressing unnecessary power cutback by changing the material of an adjuster rod, comprising: a first step of installing seven groups of adjuster rods composed of first to seventh groups of adjuster rods so as to be respectively inserted into and drawn out of different portions of a nuclear fuel assembly, wherein the seventh group of adjuster rods is manufactured such that a reactivity value of the adjuster rods constituting the seventh group of adjuster rods is smaller than a reactivity value of the adjuster rods constituting the remaining groups of adjuster rods; and a second step of drawing out the seventh group of adjuster rods last when the first to seventh group of adjuster rods are all drawn out of the nuclear fuel assembly. As such, it is possible to prevent the seventh group of adjuster rods from being automatically re-inserted due to a water level of a liquid zone control (LZC) system being automatically raised above an adjuster rod insertion condition water level, thereby reducing the phenomenon of unnecessarily suppressing the degree of combustion due to the re-insertion of the seventh groups of adjuster rods, such that the degree of combustion is increased to greatly save the amount of fuel to be consumed.
Inventors:
KIM SUNG MIN (KR)
KHO DONGWOOK (KR)
KIM YOUNG AE (KR)
PARK DONG HWAN (KR)
RYU UISEUNG (KR)
YOU SUNG CHANG (KR)
KIM YONG BAE (KR)
KHO DONGWOOK (KR)
KIM YOUNG AE (KR)
PARK DONG HWAN (KR)
RYU UISEUNG (KR)
YOU SUNG CHANG (KR)
KIM YONG BAE (KR)
Application Number:
PCT/KR2018/011878
Publication Date:
June 06, 2019
Filing Date:
October 10, 2018
Export Citation:
Assignee:
KOREA HYDRO & NUCLEAR POWER CO (KR)
International Classes:
G21C7/26; C22C19/07; G21C5/12
Foreign References:
| KR20040076799A | 2004-09-03 | |||
| KR20160084048A | 2016-07-13 | |||
| KR20120029823A | 2012-03-27 | |||
| KR20090061219A | 2009-06-16 | |||
| US6748348B1 | 2004-06-08 |
Attorney, Agent or Firm:
LEE, Un Cheol (KR)
Download PDF: