KR100237136B1 - Candu fuel bundle with a low void coefficient - Google Patents
Candu fuel bundle with a low void coefficient Download PDFInfo
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- KR100237136B1 KR100237136B1 KR1019970008990A KR19970008990A KR100237136B1 KR 100237136 B1 KR100237136 B1 KR 100237136B1 KR 1019970008990 A KR1019970008990 A KR 1019970008990A KR 19970008990 A KR19970008990 A KR 19970008990A KR 100237136 B1 KR100237136 B1 KR 100237136B1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
본 발명은 저 기포반응도용 CANDU 핵연료 다발에 관한 것으로, 그 목적은 중심봉, 내환봉, 및 외환봉으로 구성된 핵 연료 다발의 중심봉 또는 중심봉과 내환봉에 냉각재 기포반응도를 감소시키는 물질을 도입하여 CANDU 원자로의 냉각재기포반응도를 감소시키는 저 기포반응도용 CANDU 핵연료 다발을 제공하는 것이다.The present invention relates to a CANDU nuclear fuel bundle for low bubble reactivity, the object of the CANDU reactor by introducing a material to reduce the coolant bubble reactivity to the central rod or central rod and inner rod of the nuclear fuel bundle consisting of a central rod, inner ring rod, and foreign exchange rod To provide a low-bubble CANDU fuel bundle to reduce the coolant bubble reactivity of the fuel cell.
본 발명은 중심봉, 내환봉, 중환봉 및 외환봉으로 구성된 CANDU 핵연료다발의 중심봉 또는 중심봉과 내환봉에 그래파이트(graphite)를 도입하여 냉각재 기포반응도를 감소시키는 저 기포반응도용 CANDU 핵연료 다발을 제공함에 있다.The present invention provides a low bubble reactivity CANDU fuel bundle for reducing coolant bubble reactivity by introducing graphite into a central rod or a central rod and an inner ring of a CANDU nuclear fuel bundle consisting of a central rod, an inner ring rod, a heavy ring rod, and a foreign exchange rod. .
Description
본 발명은 저 기포반응도용 CANDU 핵연료 다발에 관한 것으로, 중심봉, 내환봉, 중환봉 및 외환봉으로 구성된 핵 연료 다발을 이용하여 CANDU 원자로의 냉각재기포반응도를 감소시키는 저 기포반응도용 CANDU 핵연료 다발에 관한 것이다.The present invention relates to a CANDU fuel bundle for low bubble reactivity, and relates to a CANDU fuel bundle for low bubble reactivity to reduce the coolant bubble reactivity of a CANDU reactor using a nuclear fuel bundle consisting of a central rod, an inner ring, a heavy rod, and a foreign exchange rod. will be.
종래의 CNADU-6 원자로의 안전성과 관련하여 근본적으로 고려되어야 할 사항은 CANDU-6 원자로에서는 양의 기포반응도가 크기 때문에 냉각재 상실 사고시, 출력증가가 발생하여 이에 대한 안전장치가 필요하다는 것이다.The fundamental consideration regarding the safety of the conventional CNADU-6 reactor is that the positive bubble reactivity is high in the CANDU-6 reactor, so in case of the loss of coolant, the output increases and a safety device is required.
해외에서는 상기와 같이 CANDU 원자로의 기포반응도를 감소시키기 위하여 핵연료 다발에 감손우라늄의 사용이 제안되어 왔으나 감손우라늄은 핵분열할 수 있는 양이 작고 중성자의 흡수체로 작용하기 때문에 연소도 보상이 많아 경제성이 떨어진다는 문제점이 있었다.As described above, depleted uranium has been proposed to reduce the bubble reactivity of CANDU reactors. However, depleted uranium has a small amount of nuclear fission and acts as an absorber for neutrons, resulting in poor economic efficiency due to high combustion compensation. Had a problem.
본 발명은 상기와 같은 문제점을 고려하여 이루어진 것으로, 그 목적은 중심봉, 내환봉, 중환봉 및 외환봉으로 구성된 핵연료다발의 중심봉 또는 중심봉과 내환봉에 냉각재 기포반응도를 감소시키는 물질을 도입하여 CANDU 원자로의 냉각재기포반응도를 감소시키는 저 기포반응도용 CANDU 핵연료 다발을 제공하는 것이다.The present invention has been made in view of the above problems, and its purpose is to introduce a material that reduces the coolant bubble reactivity to the central rod or central rod and inner ring of the nuclear fuel bundle consisting of a central rod, inner ring rod, heavy ring rod, and foreign exchange rod. To provide a low-bubble CANDU fuel bundle to reduce the coolant bubble reactivity of the fuel cell.
본 발명은 CANDU 원자로의 냉각제 기판반응도를 감소시킴으로서 달성되는데 즉, 중심봉, 내환봉, 중환봉 및 외환봉으로 구성된 CANDU 핵연료다발의 중심봉 또는 중심봉과 내환봉에 그래파이트를 도입하여 냉각재 기포반응도를 감소시키는 저기포반응도용 CANDU 핵연료 다발을 제공함에 있다.The present invention is achieved by reducing the coolant substrate reactivity of the CANDU reactor, that is, introducing the graphite into the center rod or the center rod and the inner rod of the CANDU nuclear fuel bundle composed of the center rod, the inner rod, the heavy rod and the foreign exchange rod, thereby reducing the coolant bubble reactivity. To provide a bunch of CANDU fuels for four reactivity.
제1도는 기존의 핵연료다발인 37-핵연료다발의 평면도.1 is a plan view of a conventional nuclear fuel bundle, a 37-nuclear bundle.
제2도는 현재 개발중에 있는 개량 핵연료다발인 43-핵연료다발의 평면도.2 is a plan view of a 43-fuel bundle, an improved fuel bundle currently under development.
제3(a)도는 본 발명에 따른 중심봉이 그래파이트(graphite)봉인 핵연료 다발의 평면도.3 (a) is a plan view of a nuclear fuel bundle in which the central rod of the present invention is a graphite rod;
제3(b)도는 본 발명에 따른 중심봉과 내환봉이 그래파이트(graphite)봉인 핵연료 다발의 평면도.Figure 3 (b) is a plan view of the nuclear fuel bundle is the center rod and the inner ring rod graphite (graphite) according to the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 중심봉 2 : 내환봉1: center rod 2: inner ring
3 : 중환봉 4 : 외환봉3: heavy rod 4: foreign currency rod
제3(a)도는 본 발명에 따른 중심봉이 그래파이트(graphite)봉인 핵연료 다발의 평면도를, 제3(b)도는 본 발명에 따른 중심봉과 내환봉이 그래파이트봉인 핵연료 다발의 평면도를 도시한 것으로, 중심봉(1), 내환봉(2), 중환봉(3) 및 외환봉(4)으로 구성된 핵 연료 다발의 중환봉(3)과 외환봉(4)에는 핵물질(우라늄)을 사용하고, 중심봉(1) 또는 중심봉(1)과 내환봉(2)에 그래파이트를 사용하였다.Figure 3 (a) is a plan view of the nuclear fuel bundle of the center rod is a graphite (graphite) rod according to the present invention, Figure 3 (b) is a plan view of the nuclear fuel bundle is a center rod and the inner ring rod is a graphite rod according to the present invention, (1) Nuclear material (uranium) is used for the nuclear fuel bundle (3) and the foreign exchange rod (4), which are composed of the inner rod (2), the heavy rod (3), and the foreign exchange rod (4). 1) or graphite was used for the central rod (1) and the inner ring (2).
즉, 본 발명은 CANDU 원자로의 냉각재 기포반응도를 감소시키기 위하여 중심부위의 핵연료 물질대신 기판반응도를 극소화 할 수 있도록 하기 위하여 중심봉(1) 또는 중심봉(1)과 내환봉(2)에 그래파이트가 도입된 핵연료를 조성한 것이다.That is, in the present invention, graphite is introduced into the center rod (1) or the center rod (1) and the inner ring rod (2) in order to minimize the substrate reactivity instead of the fuel material on the center in order to reduce the coolant bubble reactivity of the CANDU reactor. Nuclear fuel was created.
또한, 상기 핵연료다발의 핵연료봉 크기를 임의로 조절하여 그래파이트의 양을 조절할 수 있다.In addition, the amount of graphite can be adjusted by arbitrarily adjusting the size of the fuel rods of the fuel bundle.
이하 기존의 핵연료인 37-핵연료다발과 개량핵연료인 43-핵연료다발의 그래파이트 연료봉 갯수에 따른 냉각재 기포 반응도를 살펴보면 다음과 같다.Hereinafter, the coolant bubble reactivity according to the number of graphite fuel rods of the existing fuel bundle 37- nuclear fuel and the improved fuel 43-nuclear fuel bundle is as follows.
상기 표 1에서와 같이 중간 연소도에서 기존핵연료의 냉각재 기포반응도는 14.7 mk로 그래파이트봉을 1개 사용하면 0.4 mk, 그래파이트봉을 7개 사용하면 2.6 mk 낮아진다. 또 현재 개발중인 개량 핵연료에서는 그래파이트봉을 1개 사용하면 약 0.5 mk, 그래파이트봉을 8개 사용하면 3.2 mk 낮아진다.As shown in Table 1, the coolant bubble reactivity of the existing fuel at the intermediate combustion degree is 14.7 mk, which is 0.4 mk when one graphite rod is used, and 2.6 mk when seven graphite rods are used. In addition, the improved nuclear fuel under development is about 0.5 mk with one graphite rod and 3.2 mk lower with eight graphite rods.
이와 같이 본 발명은 중심봉, 내환봉, 중환봉 및 외환봉으로 구성된 핵 연료 다발의 중심봉 또는 중심봉과 내환봉에 그래파이트를 사용하면 그래파이트가 정상운전시 감속재로 작용하므로 중성자 경제성이 좋아지고, 냉각재가 기포화될 경우 중성자속이 가장 많이 증가하는 중심부위에 핵분열을 일으키는 핵연료 물질이 존재하지 않음에 따라 기포반응도의 증가가 억제되며, 방사성 폐기물로서 악티니드 아이소토프(actinide isotope)의 생성도 감소되는등 많은 효과가 있다.Thus, in the present invention, if graphite is used in the center rod or the center rod and the inner ring rod of the nuclear fuel bundle composed of the center rod, inner ring rod, heavy ring rod, and foreign exchange rod, the neutron economy is improved because the graphite acts as a moderator during normal operation. When saturated, there is no effect of fission-producing nuclear fuel on the center where the neutron flux increases, and thus the increase in bubble reactivity is suppressed and the production of actinide isotope as radioactive waste is also reduced.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019970008990A KR100237136B1 (en) | 1997-03-17 | 1997-03-17 | Candu fuel bundle with a low void coefficient |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019970008990A KR100237136B1 (en) | 1997-03-17 | 1997-03-17 | Candu fuel bundle with a low void coefficient |
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| Publication Number | Publication Date |
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| KR19980073621A KR19980073621A (en) | 1998-11-05 |
| KR100237136B1 true KR100237136B1 (en) | 2000-01-15 |
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| KR1019970008990A KR100237136B1 (en) | 1997-03-17 | 1997-03-17 | Candu fuel bundle with a low void coefficient |
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