JPH09127279A - Nuclear fuel pellet and production thereof - Google Patents

Nuclear fuel pellet and production thereof

Info

Publication number
JPH09127279A
JPH09127279A JP7313517A JP31351795A JPH09127279A JP H09127279 A JPH09127279 A JP H09127279A JP 7313517 A JP7313517 A JP 7313517A JP 31351795 A JP31351795 A JP 31351795A JP H09127279 A JPH09127279 A JP H09127279A
Authority
JP
Japan
Prior art keywords
nuclear fuel
pellet
grain size
powder
outer peripheral
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
JP7313517A
Other languages
Japanese (ja)
Inventor
Yoshihisa Yuasa
敬久 湯浅
Tetsushi Matsuda
哲志 松田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nuclear Fuel Industries Ltd
Original Assignee
Nuclear Fuel Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nuclear Fuel Industries Ltd filed Critical Nuclear Fuel Industries Ltd
Priority to JP7313517A priority Critical patent/JPH09127279A/en
Publication of JPH09127279A publication Critical patent/JPH09127279A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00Energy generation of nuclear origin
    • Y02E30/30Nuclear fission reactors

Landscapes

  • Inorganic Compounds Of Heavy Metals (AREA)

Abstract

PROBLEM TO BE SOLVED: To suppress discharge of FP gas by increasing the grain size of crystal only at the outer circumferential part of a pellet thereby retarding microcrystallization while simultaneously decreasing the porosity. SOLUTION: Thickness C at the outer circumferential part 1 surrounding the core part 2 of a columnar pellet is set about 20μm or above, preferably in the range of 20-2500μm. The core part 2 has ordinary mean grain size of 10μm or less and the outer circumferential part 1 has grain size two times as large as that at the core part 2. More specifically, mean grain size at the outer circumferential part 1 is set at 20μm or above, preferably in the range of 50-200μm. Consequently, microcrystallization can be retarded at the rim part at the time of high specific burnup and discharge of FP gas can be suppressed by decreasing the porosity at the time of producing a pellet. The pellet is produced by sintering a green pellet, prepared by adding U3 O8 to UO2 powder, in oxidizing atmosphere having partial pressure of oxygen of 20ppm or above for 2-6 hours at 1000-1300 deg.C and then sintering the green pellet in reducing atmosphere for 1 hour or longer at 1000 deg.C or above.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】本発明は、ペレット外周部の
みを大粒径化させることにより、その細粒化を抑えると
共に開気孔率を低下させ、FPガスの放出を抑えること
を目的とした核燃料ペレットおよびその製造方法に関す
るものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nuclear fuel intended to suppress the release of FP gas by suppressing the atomization of the pellets and reducing the open porosity by increasing the particle size only on the outer peripheral portion of the pellets. The present invention relates to a pellet and a method for manufacturing the pellet.

【0002】[0002]

【従来の技術】現在、商業炉にて使用されているペレッ
トは、UO2 ないしUO2 にGd2 3 を添加した核燃
料物質によって形成されている。これらのペレットを高
燃焼度まで照射した場合、ペレット外周部(リム部)に
おいて局所燃焼度約70GWd/tUを超えると、結晶
粒の細粒化が発生して、サブミクロン以下の細粒化を伴
うリム組織が形成され、これによりFPガスの放出量の
増加や熱伝達率の低下などが懸念されている。
2. Description of the Prior Art Pellets currently used in commercial furnaces are formed of nuclear fuel materials containing UO 2 or UO 2 and Gd 2 O 3 added thereto. When these pellets are irradiated to a high burnup and the local burnup exceeds about 70 GWd / tU at the pellet outer periphery (rim portion), grain refinement occurs, and sub-micron or finer grain refinement occurs. As a result, a rim structure is formed, which raises concerns about an increase in the amount of FP gas released and a decrease in heat transfer coefficient.

【0003】上記リム部の細粒化のメカニズムについて
は現在も明確にはされていないが、ペレット組織の結晶
が小粒である場合に、リム効果の特徴である結晶粒の細
粒化や気孔の形成が起こり易いことが下記論文によって
提示されている。ANS/ENS TOPICAL MTG. ON LWR FUEL
PERFOR MANCE,1991 に提出された論文「EFFECT OF GRAI
N SIZE ON THE FISSION GAS RELEASE FROM THE RIM O
F HIGH BURNUP FUEL PELLETS」
Although the mechanism of grain refinement of the rim portion has not been clarified at present, when the crystals of the pellet structure are small grains, grain refinement and porosity which are characteristic of the rim effect are characterized. The following paper suggests that formation is likely to occur. ANS / ENS TOPICAL MTG. ON LWR FUEL
Paper `` EFFECT OF GRAI submitted to PERFOR MANCE, 1991
N SIZE ON THE FISSION GAS RELEASE FROM THE RIM O
F HIGH BURNUP FUEL PELLETS ''

【0004】これに対し、上記FPガスの放出を抑える
ために焼結ペレットの結晶粒をペレット全体で粗大化さ
せる方法が提案されており、例えば特開平4−2858
91号公報、特開平5−11088号公報及び特開平3
−249595号公報などに開示されている。
On the other hand, there has been proposed a method of coarsening the crystal grains of the sintered pellet in the whole pellet in order to suppress the emission of the FP gas, for example, Japanese Patent Laid-Open No. 4-2858.
No. 91, No. 5-11088, and No. 3
It is disclosed in Japanese Patent Publication No. 249595.

【0005】しかしながら、上記の如くペレットの結晶
粒が大きくなった場合は、クリープ速度の低下の問題が
生じると共に、上記結晶粒径の粗大化を目的として添加
物を用いた場合は、廃棄物処理時の不純物残渣の問題も
残される。
However, when the crystal grains of the pellets become large as described above, there arises a problem of a decrease in creep rate, and when additives are used for the purpose of coarsening the crystal grain size, waste treatment is performed. The problem of residual impurities remains.

【0006】[0006]

【発明が解決しようとする課題】本発明は叙上の如き実
状に対処し、ペレット外周部の結晶のみを大粒径化させ
ることにより、前記結晶粒の細粒化を抑制すると同時に
開気孔率を低下させ、これによりFPガスの放出を抑え
ることを目的とするものである。
DISCLOSURE OF THE INVENTION The present invention deals with the above-mentioned situation and increases the grain size of only the crystal in the outer peripheral portion of the pellet to suppress the grain refinement of the crystal grain and at the same time open porosity. For the purpose of suppressing the release of FP gas.

【0007】[0007]

【課題を解決するための手段】すなわち、上記目的に適
合する本発明の核燃料ペレットは、略円柱状の核燃料ペ
レットにおいて、周面からの厚みが約20〜2500μ
mの外周部と、この外周部に囲まれたコア部とからな
り、このコア部の平均結晶粒径を10μm以下の通常粒
径として、上記外周部の平均結晶粒径を上記コア部の平
均結晶粒径の2倍以上としたことを特徴とする。
That is, the nuclear fuel pellet of the present invention which meets the above-mentioned object is a substantially cylindrical nuclear fuel pellet having a thickness of about 20 to 2500 μm from the peripheral surface.
m and a core portion surrounded by the outer peripheral portion, and the average crystal grain diameter of the core portion is defined as a normal grain diameter of 10 μm or less, and the average crystal grain diameter of the outer peripheral portion is the average of the core portion. It is characterized in that the grain size is at least twice the crystal grain size.

【0008】そして、上記本発明の核燃料ペレットにお
いて、上記外周部の厚みを少なくとも50μmとして、
その平均結晶粒径を約50〜200μmとすることも可
能である。
In the nuclear fuel pellet of the present invention, the outer peripheral portion has a thickness of at least 50 μm,
The average crystal grain size can be about 50 to 200 μm.

【0009】一方、上記本発明の核燃料ペレットの製造
方法としては、先ず1つはUO2 粉末にU3 8 を添加
してプレスしたグリーンペレットを酸素分圧20ppm
以上の酸化雰囲気中、約1000〜1300℃で約2〜
6時間焼結し、次いで還元雰囲気中、1000℃以上で
少なくとも1時間焼結することを特徴とする。
On the other hand, as a method for producing the nuclear fuel pellets of the present invention, first, a green pellet obtained by adding U 3 O 8 to UO 2 powder and pressing the green pellets has an oxygen partial pressure of 20 ppm.
In the above oxidizing atmosphere, at about 1000 to 1300 ° C., about 2 to
It is characterized by being sintered for 6 hours and then at least 1000 ° C. in a reducing atmosphere for at least 1 hour.

【0010】また、本発明第2の核燃料ペレットの製造
方法は、原料粉末のプレス時に、前記コア部の領域に比
表面積約2〜5m2 のUO2 粉末を装填すると共に、前
記外周部の領域に比表面積6m2 以上、好適には10m
2 以上の活性なUO2 粉末、またはU3 8 を添加した
UO2 粉末の何れか一方を装填し、プレス後のグリーン
ペレットを水素と窒素の混合ガス中、1700℃以上で
少なくとも2時間焼結することを特徴とする。
Further, in the second method for producing nuclear fuel pellets of the present invention, when pressing the raw material powder, UO 2 powder having a specific surface area of about 2 to 5 m 2 is loaded in the region of the core portion and the region of the outer peripheral portion is loaded. A specific surface area of 6 m 2 or more, preferably 10 m
2 or more active UO 2 powder or U 3 O 8 was charged to one of the UO 2 powder was added, mixed gas green pellets of hydrogen and nitrogen after pressing, at least 2 hours sintered at 1700 ° C. or higher, It is characterized by tying.

【0011】[0011]

【作用】上記本発明の核燃料ペレットにおいては、コア
部は通常粒径として、外周部のみを大粒径化することに
よって、高燃焼度時に生じるリム部分の細粒化の発生を
遅らせることができ、またペレット製造時の開気孔率を
低くすることができるため併せてFPガス放出を抑える
ことができる。
In the nuclear fuel pellet of the present invention described above, the core part has a normal particle size, and only the outer peripheral part has a large particle size, so that it is possible to delay the occurrence of the atomization of the rim part which occurs at a high burnup. Moreover, since the open porosity at the time of pellet production can be lowered, the FP gas release can be suppressed at the same time.

【0012】そして、外周部のみ大粒径化しているた
め、ペレット全体を大粒径化した従来のペレットに比べ
クリープ速度の低下を抑制することが可能である。
Since only the outer peripheral portion has a large grain size, it is possible to suppress a decrease in creep rate as compared with a conventional pellet in which the entire pellet has a large grain size.

【0013】[0013]

【実施例】以下さらに添付図面を参照して、本発明の実
施例を説明する。
Embodiments of the present invention will be described below with reference to the accompanying drawings.

【0014】図1は本発明実施例の核燃料ペレットを示
す断面図、図2は同第2実施例の核燃料ペレットを示す
断面図であり、図1に示すものは、ほぼ円柱状をなすペ
レットの周面からの厚みCが約20μm以上の外周部1
と、この外周部1に囲まれたコア部2とからなる。外周
部1の厚みCは約20〜2500μmの範囲が適当であ
る。
FIG. 1 is a sectional view showing a nuclear fuel pellet according to an embodiment of the present invention, and FIG. 2 is a sectional view showing a nuclear fuel pellet according to the second embodiment. FIG. 1 shows a substantially cylindrical pellet. Outer peripheral portion 1 having a thickness C of about 20 μm or more from the peripheral surface
And a core portion 2 surrounded by the outer peripheral portion 1. The thickness C of the outer peripheral portion 1 is appropriately in the range of about 20 to 2500 μm.

【0015】図2に示すものも、同じく外周部1とコア
部2とからなるが、外周部1がペレットの端面部まで形
成されて上記コア部2を覆っている。この端面部3にお
ける外周部1の厚みC′は、この例では20μm以上で
あり、好適には20〜2500μmの範囲が適当であ
る。
The one shown in FIG. 2 also comprises an outer peripheral portion 1 and a core portion 2, but the outer peripheral portion 1 is formed up to the end face portion of the pellet and covers the core portion 2. The thickness C ′ of the outer peripheral portion 1 of the end face portion 3 is 20 μm or more in this example, and preferably in the range of 20 to 2500 μm.

【0016】そして、上記第1,第2各実施例の核燃料
ペレットにおいては、上記コア部2を10μm以下の通
常の平均結晶粒径として、上記外周部1の平均結晶粒径
を上記コア部2の2倍以上としている。即ち、上記ペレ
ット外周部1の平均結晶粒径は少なくとも20μm以
上、好ましくは約50〜200μmの範囲が適当であ
る。
In the nuclear fuel pellets of the first and second embodiments, the core portion 2 has a normal average crystal grain diameter of 10 μm or less, and the average crystal grain diameter of the outer peripheral portion 1 is the core portion 2. Is more than double. That is, the average crystal grain size of the outer peripheral portion 1 of the pellet is at least 20 μm or more, preferably about 50 to 200 μm.

【0017】次に、上記本発明実施例の核燃料ペレット
の製造方法を説明する。図3は、酸化雰囲気および還元
雰囲気の2領域からなる焼結炉を用いて製作した本発明
のペレットの金相写真である。
Next, a method of manufacturing the nuclear fuel pellet of the above-mentioned embodiment of the present invention will be described. FIG. 3 is a metallurgical photograph of pellets of the present invention manufactured using a sintering furnace consisting of two regions, an oxidizing atmosphere and a reducing atmosphere.

【0018】このペレットは、UO2 粉末に30wt%
のU3 8 を添加した粉末を用いてプレス成型したグリ
ーンペレットを、酸化雰囲気(焼結条件:焼結温度11
50℃×約3時間、酸素分圧20〜100ppm)およ
び還元雰囲気(焼結条件:焼結温度1150℃×1時間
以上、アンモニア分解ガス中)で焼結して製作したもの
である。この方法により作製したペレットは図3のよう
に周辺部が大粒径でその内側が小粒径の断面形状を有し
ていた。なお、上記還元雰囲気としては、水素ガスを添
加した窒素等の不活性ガスが適用することができる。
This pellet contains 30 wt% of UO 2 powder.
Green pellets press-molded using the U 3 O 8 -added powder are mixed in an oxidizing atmosphere (sintering condition: sintering temperature 11
It is manufactured by sintering at 50 ° C. for about 3 hours, oxygen partial pressure of 20 to 100 ppm) and a reducing atmosphere (sintering condition: sintering temperature of 1150 ° C. for 1 hour or more, in ammonia decomposition gas). The pellet produced by this method had a cross-sectional shape with a large grain size in the peripheral portion and a small grain size inside as shown in FIG. As the reducing atmosphere, an inert gas such as nitrogen added with hydrogen gas can be applied.

【0019】下記表1に、上記本発明実施のペレットと
従来のペレットの2例について夫々の開気孔率を測定し
た結果を示す。
Table 1 below shows the results of measuring the open porosities of the above-mentioned pellets of the present invention and conventional pellets.

【0020】[0020]

【表1】 [Table 1]

【0021】また、本発明のもう1つの製造方法によ
り、前記本発明の核燃料ペレットを製作した。このペレ
ットは、原料粉末のプレス時に、図1に示すコア部2の
領域に比表面積約2〜5m2 のUO2 粉末を装填すると
共に、同図に示す外周部1の領域に比表面積6〜10m
2 、もしくはそれ以上の活性なUO2 粉末(またはU3
8 を添加したUO2 粉末の何れか一方の粉末)を装填
し、プレス後のグリーンペレットを通常の焼結条件、す
なわち、水素と窒素の混合ガス中、1700℃で約3時
間焼結することにより得ることができた。このペレット
は前記図1に示す2領域断面形状を有していた。
Further, the nuclear fuel pellet of the present invention was manufactured by another manufacturing method of the present invention. This pellet is loaded with UO 2 powder having a specific surface area of about 2 to 5 m 2 in the region of the core portion 2 shown in FIG. 1 and pressing the raw material powder into the region of the outer peripheral portion 1 shown in FIG. 10m
2 or more active UO 2 powder (or U 3
The O 8 UO 2 loaded with one of the powder) of powder added, the green pellets normal sintering conditions after pressing, i.e., a mixed gas of hydrogen and nitrogen, for about 3 hours and sintered at 1700 ° C. It was possible to obtain it. This pellet had the cross-sectional shape of the two regions shown in FIG.

【0022】[0022]

【発明の効果】以上説明したように、本発明の核燃料ペ
レットは、厚みが20μm以上の外周部と、この外周部
に囲まれたコア部とからなり、このコア部の結晶粒径を
通常粒径として、上記外周部の平均結晶粒径を上記コア
部の平均結晶粒径の2倍以上となしたものであり、外周
部のみを大粒径化することによって、高燃焼度時に生じ
るリム部分の細粒化の発生を遅らせることができ、また
ペレット製造時の開気孔率を低くすることができるた
め、併せてFPガス放出を抑えることが可能であり、さ
らに外周部のみ大粒径化しているため、ペレット全体を
大粒径化した従来のペレットに比べクリープ速度の低下
を抑制し、ソフトペレット効果を有するとの顕著な効果
を奏するものである。
As described above, the nuclear fuel pellet of the present invention comprises an outer peripheral portion having a thickness of 20 μm or more and a core portion surrounded by the outer peripheral portion, and the crystal grain size of this core portion is a normal grain. As a diameter, the average crystal grain size of the outer peripheral portion is twice or more the average crystal grain size of the core portion, and by increasing the diameter of only the outer peripheral portion, a rim portion generated at high burnup Since it is possible to delay the generation of fine particles and to reduce the open porosity at the time of pellet production, it is possible to suppress the release of FP gas at the same time, and to increase the particle size only in the outer peripheral portion. Therefore, as compared with the conventional pellet in which the entire pellet has a large particle size, the decrease in creep rate is suppressed, and a remarkable effect of having a soft pellet effect is exhibited.

【0023】そして、本発明の第1,第2の核燃料ペレ
ットの製造方法は、夫々に上記本発明の核燃料ペレット
を効率的かつ確実に製造することが可能である。
The first and second methods for producing nuclear fuel pellets of the present invention can efficiently and reliably produce the nuclear fuel pellets of the present invention.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明実施例の核燃料ペレットを示す断面図で
ある。
FIG. 1 is a sectional view showing a nuclear fuel pellet according to an embodiment of the present invention.

【図2】同第2実施例の核燃料ペレットを示す断面図で
ある。
FIG. 2 is a sectional view showing a nuclear fuel pellet of the second embodiment.

【図3】本発明実施例の核燃料ペレットの金相写真であ
る。
FIG. 3 is a metallurgical photograph of nuclear fuel pellets of an example of the present invention.

【符号の説明】[Explanation of symbols]

1 外周部 2 コア部 3 端面部 1 outer peripheral part 2 core part 3 end face part

─────────────────────────────────────────────────────
────────────────────────────────────────────────── ───

【手続補正書】[Procedure amendment]

【提出日】平成8年1月31日[Submission date] January 31, 1996

【手続補正1】[Procedure amendment 1]

【補正対象書類名】明細書[Document name to be amended] Statement

【補正対象項目名】図面の簡単な説明[Correction target item name] Brief description of drawings

【補正方法】変更[Correction method] Change

【補正内容】[Correction contents]

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明実施例の核燃料ペレットを示す断面図で
ある。
FIG. 1 is a sectional view showing a nuclear fuel pellet according to an embodiment of the present invention.

【図2】同第2実施例の核燃料ペレットを示す断面図で
ある。
FIG. 2 is a sectional view showing a nuclear fuel pellet of the second embodiment.

【図3】本発明実施例の核燃料ペレットの金属組織を示
す顕微鏡写真である。
FIG. 3 shows a metallographic structure of a nuclear fuel pellet according to an embodiment of the present invention.
It is a micrograph .

【符号の説明】 1 外周部 2 コア部 3 端面部[Explanation of symbols] 1 outer peripheral portion 2 core portion 3 end face portion

Claims (5)

【特許請求の範囲】[Claims] 【請求項1】 略円柱状の核燃料ペレットにおいて、周
面からの厚みが約20〜2500μmの外周部と、この
外周部に囲まれたコア部とからなり、このコア部の平均
結晶粒径を10μm以下の通常粒径として、上記外周部
の平均結晶粒径を上記コア部の平均結晶粒径の2倍以上
としたことを特徴とする核燃料ペレット。
1. A substantially cylindrical nuclear fuel pellet comprising an outer peripheral portion having a thickness of about 20 to 2500 μm from the peripheral surface and a core portion surrounded by the outer peripheral portion, and the average crystal grain size of the core portion is A nuclear fuel pellet, characterized in that the average crystal grain size of the outer peripheral portion is at least twice the average crystal grain size of the core portion as a normal grain size of 10 μm or less.
【請求項2】 上記外周部の厚みを少なくとも50μm
として、その平均結晶粒径を約50〜200μmとした
請求項1記載の核燃料ペレット。
2. The thickness of the outer peripheral portion is at least 50 μm.
The nuclear fuel pellet according to claim 1, wherein the average crystal grain size is about 50 to 200 µm.
【請求項3】 請求項1乃至2記載の核燃料ペレットの
製造方法であって、UO2 粉末にU3 8 を添加してプ
レスしたグリーンペレットを酸素分圧20ppm以上の
酸化雰囲気中、約1000〜1300℃で約2〜6時間
焼結し、次いで還元雰囲気中、1000℃以上で少なく
とも1時間焼結することを特徴とする核燃料ペレットの
製造方法。
3. The method for producing nuclear fuel pellets according to claim 1 or 2, wherein green pellets obtained by adding U 3 O 8 to UO 2 powder and pressing the green pellets in an oxidizing atmosphere having an oxygen partial pressure of 20 ppm or more are about 1000. A method for producing nuclear fuel pellets, which comprises sintering at ˜1300 ° C. for about 2 to 6 hours and then at 1000 ° C. or higher in a reducing atmosphere for at least 1 hour.
【請求項4】 請求項1乃至2記載の核燃料ペレットの
製造方法であって、原料粉末のプレス時に、前記コア部
の領域に比表面積約2〜5m2 のUO2 粉末を装填する
と共に、前記外周部の領域に比表面積6m2 以上の活性
なUO2 粉末、またはU3 8 を添加したUO2 粉末の
何れか一方を装填し、プレス後のグリーンペレットを水
素と窒素の混合ガス中、1700℃以上で少なくとも2
時間焼結することを特徴とする核燃料ペレットの製造方
法。
4. The method for producing a nuclear fuel pellet according to claim 1, wherein the core region is loaded with UO 2 powder having a specific surface area of about 2 to 5 m 2 when the raw material powder is pressed. peripheral region on the specific surface area 6 m 2 or more active UO 2 powder or U 3 O 8 was charged to one of the UO 2 powder was added, a mixed gas of hydrogen and nitrogen green pellets after pressing, At least 2 above 1700 ° C
A method for producing a nuclear fuel pellet, which comprises performing time sintering.
【請求項5】 上記外周部の領域に装填するUO2 粉末
として、比表面積が10m2 以上の活性なUO2 粉末を
用いる請求項4記載の核燃料ペレットの製造方法。
5. The method for producing nuclear fuel pellets according to claim 4, wherein active UO 2 powder having a specific surface area of 10 m 2 or more is used as the UO 2 powder loaded in the region of the outer peripheral portion.
JP7313517A 1995-11-06 1995-11-06 Nuclear fuel pellet and production thereof Withdrawn JPH09127279A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7313517A JPH09127279A (en) 1995-11-06 1995-11-06 Nuclear fuel pellet and production thereof

Publications (1)

Publication Number Publication Date
JPH09127279A true JPH09127279A (en) 1997-05-16

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Country Link
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002519677A (en) * 1998-06-26 2002-07-02 ブリティッシュ・ニュークリア・フューエルズ・パブリック・リミテッド・カンパニー Nuclear fuel pellets
EP1713086A1 (en) * 2000-11-30 2006-10-18 Framatome ANP Oxide nuclear fuel pellet and corresponding manufacturing process
JP2017526918A (en) * 2014-09-08 2017-09-14 ウェスティングハウス エレクトリック スウェーデン アーベー Method for making nuclear fuel pellets for nuclear power reactors
WO2019243095A1 (en) 2018-06-21 2019-12-26 Westinghouse Electric Sweden Ab Fuel pellet

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002519677A (en) * 1998-06-26 2002-07-02 ブリティッシュ・ニュークリア・フューエルズ・パブリック・リミテッド・カンパニー Nuclear fuel pellets
JP4700806B2 (en) * 1998-06-26 2011-06-15 ウェスティングハウス・エレクトリック・カンパニー,リミテッド・ライアビリティー・カンパニー Nuclear fuel pellets
EP1713086A1 (en) * 2000-11-30 2006-10-18 Framatome ANP Oxide nuclear fuel pellet and corresponding manufacturing process
JP2017526918A (en) * 2014-09-08 2017-09-14 ウェスティングハウス エレクトリック スウェーデン アーベー Method for making nuclear fuel pellets for nuclear power reactors
US10361008B2 (en) 2014-09-08 2019-07-23 Westinghouse Electric Sweden Ab Method of making a nuclear fuel pellet for a nuclear power reactor
WO2019243095A1 (en) 2018-06-21 2019-12-26 Westinghouse Electric Sweden Ab Fuel pellet
EP3588514A1 (en) 2018-06-21 2020-01-01 Westinghouse Electric Sweden AB Fuel pellet
JP2021527802A (en) * 2018-06-21 2021-10-14 ウェスティングハウス エレクトリック スウェーデン アーベー Fuel pellet
US11335468B2 (en) 2018-06-21 2022-05-17 Westinghouse Electric Sweden Ab Fuel pellet

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