⅔≀⌮ࡢ◊✲ࠉ➨ྕࠉ㸦ᖺ᭶㸧<➨41ᅇ⅔≀⌮ኟᮇࢭ࣑ࢼ࣮ሗ࿌> ⱝᡭ◊✲఍ሗ࿌Cmࡢ᰾≉ᛶ࡟㛵ࡍࡿ◊✲ᮾி㒔ᕷ኱Ꮫ ᕤᏛ㒊 ⎔ቃ࢚ࢿࣝࢠ࣮ᕤᏛ⛉ཎᏊ⅔ᕤᏛ◊✲ᐊ 4 ᖺ ᮌᮧ♩㸯㸬⥴ゝ ཎᏊຊⓎ㟁࡟㛵ࢃࡿ✀ࠎࡢၥ㢟ࡢ࠺ࡕ㸪ᑗ᮶࡟ரࡗ࡚ၥ㢟࡟࡞ࡿࡢࡣ౑⏝῭ࡳ⇞ᩱ࠿ࡽฟ࡚ࡃࡿ㧗ࣞ࣋ࣝᨺᑕᛶᗫᲠ≀ࡢၥ㢟࡛࠶ࡿࠋࡇࡢ୰࡛ࡶ࣐࢖ࢼ࣮࢔ࢡࢳࢽࢻ㸦MA㸧࡟ࡣⰋ࠸᰾≉ᛶࢆᣢࡘ᰾✀ࡀ࠶ࡿࡓࡵ㸪MA ෌฼⏝࡟ࡼࡾ㸪㹋㸿ࡢᾘ⁛ฎ⌮࣭⅔ᚰ≉ᛶࡢྥୖࡀ⪃࠼ࡽࢀࡿࠋణࡋ㸪MA ࡣ୍⯡ⓗ࡟ᔂቯ⇕ࡀ㧗࠸ࠋࡑࡇ࡛㸪ࡇࡢᔂቯ⇕࡟ࡼࡗ࡚⇞ᩱࢆసࡿ஦ࡀฟ᮶ࡿ࡜⪃࠼ࡽࢀࡿチᐜ್ෆ㸦20㹕/kg㸫HM㸧1㸧࡛ MA ࢆῧຍࡋ㸪⇞↝≉ᛶࡢᨵၿࢆᅗࡿࠋࡇࢀࡲ࡛ࡢ◊✲࡛㸪244Cm ࡜ 245Cm ࡢ༙ῶᮇࡢᕪࢆ฼⏝ࡋ,෭༷ᮇ㛫ࢆ⨨ࡃ஦࡟ࡼࡗ࡚
fissile ࡛࠶ࡿ 245Cm ࡀᐇຠⓗ࡟⃰⦰ࡉࢀࡿຠᯝࡀ࠶ࡿ஦ࡀศ࠿ࡗ࡚࠸ࡿ㹿ࡲࡓ,༙ῶᮇ࡟ࡼ
ࡿ 244Cm ࡢῶᑡ࡟ࡼࡾ Cm ࡢᣢࡘᔂቯ⇕ࡶపୗࡍࡿ㹿ࡇࢀࡲ࡛ࡢ Cm ⇞ᩱࡢ⇞↝≉ᛶ࡟㛵ࡍࡿ◊✲ࢆ㋃ࡲ࠼ 2)3),෭༷ᮇ㛫୰ࡢ 244Cm ࡢῶᑡ࡟ࡼࡿᔂቯ⇕ࡢపୗཬࡧ 245Cm ࡢ┦ᑐⓗ࡞ቑຍ࡟ࡼࡿ᰾≉ᛶྥୖࢆ฼⏝ࡋ࡚㸪⇞↝ᗘࢆᚑ᮶ࡼࡾ 10GWd/t ⛬ᗘ㧗ࡃࡍࡿ஦ࢆ,ᮏ◊✲ࡢ┠ⓗ࡜ࡍࡿ㹿㸰㸬෭༷࡟ࡼࡿ Cm ࡢ≉ᛶኚ໬ᡃࠎࡢࡇࢀࡲ࡛ࡢ◊✲࡟ࡼࡗ࡚㸪Cm ࡣ෭༷ᮇ㛫ࢆ⨨ࡃ஦࡛ࡑࡢ᰾≉ᛶࡀኚ໬ࡍࡿ஦ࡀศ
࠿ࡗ࡚࠸ࡿࠋࡇࢀࡣ Cm ྠ఩యࡢ኱㒊ศࢆ༨ࡵࡿ 244Cm ࡜᰾ศ⿣ᛶ᰾✀࡛࠶ࡿ 245Cm ࡢ༙ῶᮇࡀ኱ࡁࡃ␗࡞ࡿ஦࡟⏤᮶ࡍࡿ⌧㇟࡛࠶ࡿࠋTableϨ࡟㸪୺࡞ Cm ྠ఩యࡢ⇕㡿ᇦ᰾ศ⿣᩿㠃✚㸪༙ῶᮇ㸪ᔂቯ⇕ࢆ♧ࡍࠋ
Table䊠, Curium isotopes thermal cross section, half life and decay heat

㻌

244Cm

thermal fission crosssection[b]

1.037

245Cm

246Cm

2.142E+03 1.442E-01

half life[y]1.81E+01

8.5E+03

4.7E+03decay heat[W/kg]

2.8E+035.710

ࡇࡇ࠿ࡽ㸪༙ῶᮇ 8500 ᖺࡢ 245Cm ࡟ẚ࡭㸪244Cm ࡣ 18.1 ᖺ࡜༙ῶᮇࡀ▷࠸஦ࡀศ࠿ࡿࠋ౑⏝῭ࡳ⇞ᩱࢆ෭༷ࡍࡿ࡜㸪ࡑࡢ౑⏝῭ࡳ⇞ᩱ୰ࡢ Cm ࡢ⤌ᡂࡣ 244Cm ࡀȘᔂቯ࡟ࡼࡗ࡚



⅔≀⌮ࡢ◊✲ࠉ➨ྕࠉ㸦ᖺ᭶㸧ῶᑡࡋ࡚⾜ࡁ㸪┦ᑐⓗ࡟᰾ศ⿣ᛶ᰾✀㸦୺࡟ 245Cm㸧ࡢ๭ྜࡀୖ᪼ࡋ࡚⾜ࡃ㸦Fig.1㸪Fig.2㸧ࠋࡘࡲࡾ㸪౑⏝῭ࡳ⇞ᩱࢆ෭༷ࡍࡿࡇ࡜࡟ࡼࡗ࡚ᐇຠⓗ࡟ Cm ࡢ᰾ศ⿣᰾✀ࡢ⃰⦰ࢆ⾜ࡗࡓࡢ࡜ྠ➼ࡢຠᯝࡀᚓࡽࢀࡿ஦ࡀࡇࡢ⤖ᯝ࠿ࡽศ࠿ࡗࡓࠋ

Fig 2 : Fissile ratio in curium
Fig.1: Quantity of 242Cm~246Cm until to cooli㸱㸬⥺ฟຊ࡟ࡼࡿຠᯝ
 Fig.3 ࡟ Cm ࡢ⇞↝࡟㛵ࢃࡿ୺せ࡞⇞↝ࢳ࢙࣮ࣥࢆ♧ࡍࠋ⇞ᩱ࡜ࡋ࡚ Cm ࢆ⏝࠸ࡓ᫬࡟㸪ࡑࡢ୺࡞᰾✀࡛࠶ࡿ

244Cm

245Cm

䃐-decay 18.1y

244Cm ࡣ 240Pu ࡬Șᔂቯࡋ࡚⾜ࡃࠋ244Cm ࡢ༙ῶᮇࡣ▷࠸ࡓࡵ㸪240Pu ࡣ⵳✚ࡍ
ࡿࠋ240Pu ࡣ 289.1burn ࡛཯ᛂࢆ㉳ࡇࡋ㸪 241Pu

240Pu

䃐-decay 6564y(n , 䃒)
289.1b䃐-decay 14.35y

241Pu࡟ኚ໬ࡍࡿࠋࡇࡢ 241Pu ࡣFission cross section
1012barn᰾ศ⿣᰾✀࡞ࡢ࡛㸪᭱኱⇞↝ᗘࢆቑ኱ࡉࡏࡿຠᯝࡀ⏕Fig.3  Main Burn up chain ofࡌࡿࠋࡲࡓ㸪244Cm ࡢ¢ᔂቯ
240Pu ࡢ཯ᛂࡣ୰ᛶᏊ flux ࡢࣞ࣋ࣝ࡟ṇࡢ┦㛵ࢆᣢࡘࠋࡣ⮬↛࡟㉳ࡇࡿ஦㇟࡛࠶ࡿࡀ㸪ᚑࡗ࡚㸪⥺ฟຊࢆ㧗ࡵࡿ஦࡛ Cm ⇞ᩱࡢ᭱኱⇞↝ᗘࢆࡼࡾ㧗ࡵࡿ஦ࡀฟ᮶ࡿࠋࡇࡢຠᯝࡣ
244Cm ࡟㉳ᅉࡍࡿ≀࡛࠶ࡾ㸪244Cm ࡢ๭ྜࡀከࡅࢀࡤከ࠸㸪ࡘࡲࡾ෭༷ᮇ㛫ࡀ▷࠸⛬㢧ⴭ࡟⌧ࢀࡿࠋࡇࢀࡣ Fig.4 ࡟࠾࠸࡚⥺ฟຊࢆ 180W/Cm㸪440W/Cm ࡜ࡋࡓࡑࢀࡒࢀ࡛㸪30 ᖺ㸪ཬࡧ 140 ᖺ෭༷ࡋࡓ౑⏝῭ࡳ⇞ᩱ࠿ࡽྲྀࡾฟࡋࡓ⣧⢋࡞ Cm㸦ࡑࢀࡒࢀ 30㹷Cm㸪140㹷Cm࡜⛠ࡍࡿ㸧ࢆ⇞↝ࡉࡏࡓ᫬㸪30㹷Cm ࡢ᪉ࡀ⥺ฟຊࢆ㧗ࡵࡓ᫬ࡢຠᯝࡀ኱ࡁ࠸஦࠿ࡽศ࠿ࡿࠋ



⅔≀⌮ࡢ◊✲ࠉ➨ྕࠉ㸦ᖺ᭶㸧㻟㻚㻡㻝㻠㻜㼥㻌㻝㻤㻜㼃㻛㼏㼙㻝㻠㻜㼥㻌㻠㻠㻜㼃㻛㼏㼙㻟㻜㼥㻌㻝㻤㻜㼃㻛㼏㼙㻟㻜㼥㻌㻠㻠㻜㼃㻛㼏㼙㻟㼗㻙㼕㼚㼒㼕㼚㼕㼠㼥

㻞㻚㻡
㻞
㻝㻚㻡
㻝
㻜㻚㻡

100GWd/t㻜㻜㻚㻜㻜㻱㻗㻜㻜

㻝㻚㻜㻜㻱㻗㻜㻞

㻞㻚㻜㻜㻱㻗㻜㻞㻟㻚㻜㻜㻱㻗㻜㻞㼎㼡㼞㼚㼡㼜㻌㼇㻳㼃㼐㻛㼠㼉㻠㻚㻜㻜㻱㻗㻜㻞㻡㻚㻜㻜㻱㻗㻜㻞㻢㻚㻜㻜㻱㻗㻜㻞Fig 㸲 Burn up behavior to imaginary curium fuel; from 140y and 30y cooledࡋ࠿ࡋ࡞ࡀࡽ Cm ࡣᔂቯ⇕ࡀ㧗ࡃ㸪෭༷ᮇ㛫ࢆ▷ࡃ࡜ࡗࡓሙྜࡣࡼࡾࡑࢀ࡟ᑐࡍࡿ⪃៖ࢆࡍࡿᚲせࡀ࠶ࡿࠋᚑࡗ࡚㸪ᮏ◊✲࡛ࡣࡼࡾ⌧ᐇⓗ࡞⇞ᩱࢆ⪃࠼ࡿⅭ࡟㸪U ⇞ᩱ࡟ᑡ㔞ࡢCm ࢆῧຍࡍࡿࡇ࡜࡜ࡋ㸪U ⇞ᩱ࡟ῧຍฟ᮶ࡿ Cm ࡢ㝈⏺㔞ࢆᔂቯ⇕ࡢไ㝈್ࢆ⏝࠸࡚Ỵᐃࡋࡓࠋ㸲㸬ィ⟬ᡭἲ Fig.5 ࡟ᮏ◊✲ࡢィ⟬ᡭἲࢆ♧ࡍࠋ
Fuel composition alteration

Decay heat calculationDH䠘20W/kgHM

NoYes
Burn up calculation

Specific of burn up
Fig.5 flow chart of analysis

ィ⟬ᡭἲࡣ௨ୗࡢᡭ㡰࡛⾜ࡗࡓ㹿ձ:U ⇞ᩱ࡬ࡢ Cm ࡢῧຍ๭ྜࢆኚ໬ࡉࡏ,1kg-HM ᙜࡓࡾࡢᔂቯ⇕ࢆ⟬ฟࡋࡓ㹿ణࡋ,U ⇞ᩱࡢ⃰⦰ᗘࡣ 3%࡜ࡋࡓ㹿ղ:ࡇࢀࢆ෭༷ᮇ㛫ࡢ␗࡞ࡿ」ᩘ
ࡢ⤌ᡂࡢ Cm(௨ୗ,‫ۑۑ‬ᖺ෭༷ࡋࡓ౑⏝῭ࡳ⇞ᩱ⏤᮶ࡢ Cm ࢆ‫ۑۑ‬yCm ࡜⾲グ)࡟ᑐࡋ࡚⾜࠸,ᇶ‽್ࡢᆅⅬ࡛ࡢ Cm ῧຍྍ⬟๭ྜࢆồࡵࡓ㹿ճ:ồࡵࡓྛ෭༷ᮇ㛫⏤᮶ࡢ Cm ࢆῧຍྍ⬟๭ྜࡲ࡛ U ⇞ᩱ࡟ῧຍࡋ,SRAC95 ⾪✺☜⋡ィ⟬࣮ࣝࢳࣥ PIJ ࢆ⏝࠸࡚⇞↝ィ⟬ࢆ⾜ࡗࡓ㹿⅔≀⌮ࡢ◊✲ࠉ➨ྕࠉ㸦ᖺ᭶㸧ࡲࡓ,᰾ࢹ࣮ࢱࣛ࢖ࣈࣛࣜࡣ JENDL-3.3 ࢆ⏝࠸ࡓ㹿մ:ճ࡛ᚓࡽࢀࡓ⇞↝≉ᛶࡢホ౯ࢆ⾜ࡗࡓ㹿ࡲࡓ,ࡇࡢ᫬ᔂቯ⇕ィ⟬࡟⏝࠸ࡓᘧࢆ௨ୗ࡟♧ࡍ㹿¦W  DH  ¦W  DHU

DH [W / kg  HM ]W [kg ]

UCm

Cm

W1
¦ NU  AU  ¦ N Cm  ACm
1000  L
NU:ྛUྠ఩య䛾ᩘᐦᗘ

1¦ NU  AU
1000  L
1
WCm [kg ]¦ N Cm  ACm
1000  L
WU [kg ]

AU:ྛUྠ఩య䛾㉁㔞ᩘNC䡉:ྛCmྠ఩య䛾ᩘᐦᗘ
ACm:ྛCmྠ఩య䛾㉁㔞ᩘDHU:ྛUྠ఩య䛾ᔂቯ⇕[W/kg]
DHCm:ྛCmྠ఩య䛾ᔂቯ⇕[W/kg]
L:䜰䝪䜺䝗䝻ᐃᩘࡉࡽ࡟㸪⇞↝ィ⟬࡛⏝࠸ࡓయ⣔ࢆ Fig.6 ࡟♧ࡍࠋ⇞↝ィ⟬ࡣࡇࡢࡼ࠺࡞ࣆࣥࢭࣝᵓ㐀ࡢ↓㝈య⣔࡛⾜ࡗࡓࠋィ⟬䝁䞊䝗䠖SRAC95
䝷䜲䝤䝷䝸䠖JENDL3.30.476cm

1.265cm

0.412cm⇞ᩱ䠖U(Cm)O2 3䠂EU⿕そ⟶䠖䝆䝹䜹䝻䜲䠐ῶ㏿䞉෭༷ᮦ䠖㍍Ỉ

Fig.6 Calculation composition㸳㸬ィ⟬⤖ᯝ 㸳㸬㸯 ᔂቯ⇕ィ⟬࡟㛵ࡍࡿ⤖ᯝ Fig.7 ࡟,ྛ෭༷ᮇ㛫ࢆ⨨࠸ࡓ౑⏝῭ࡳ⇞ᩱ࠿ࡽࡢ Cm ࢆῧຍࡋࡓ U ⇞ᩱࡢᔂቯ⇕ィ⟬ࡢ⤖ᯝࢆ♧ࡍ㹿ᶓ㍈ࡀ Cm ࡢ HM ඲య࡟ᑐࡍࡿῧຍ㔞࡛࠶ࡾ,⦪㍈ࡀᔂቯ⇕࡛࠶ࡿ㹿ణࡋ,ᔂቯ⇕ࡢ༢఩ࡣ[W/kg-HM]࡜ࡋࡓ㹿ࡲࡓ,30yCm ࡸ 40yCm ࡣࡑࢀࡒࢀ 30 ᖺ෭༷ࡋࡓ౑⏝῭ࡳ⇞ᩱ࠿ࡽྲྀࡾฟࡋࡓ Cm ࢆព࿡ࡍࡿ㹿 ࡇࡢᅗ࠿ࡽศ࠿ࡿࡼ࠺࡟,෭༷ᮇ㛫ࡀ▷࠸᪉ࡀྠࡌῧຍ㔞࡛ࡢᔂቯ⇕ࡣ㧗ࡃ,෭༷ᮇ㛫ࡀ㛗ࡃ࡞ࡾᔂቯ⇕ࡀపῶࡍࢀࡤࡼࡾከࡃࡢ Cm ࢆῧຍࡍࡿࡇ࡜ࡀฟ᮶ࡿ㹿௒ᅇࡣᔂቯ⇕ࡢୖ㝈್࡜ࡋ࡚Kawaguchi, K. et al ,GLOBAL 2007 ,Boise, (2007) p.290-295, in CD-ROM. ࡟ ♧ ࡉ ࢀ⅔≀⌮ࡢ◊✲ࠉ➨ྕࠉ㸦ᖺ᭶㸧ࡿ,20[W/kg-HM]ࢆ᥇⏝ࡋࡓ㹿㻢㻜㻚㻜㼁㻙㻟㻜㼥㻯㼙㼁㻙㻠㻜㼥㻯㼙㼁㻙㻡㻜㼥㻯㼙㼁㻙㻢㻜㼥㻯㼙㼁㻙㻢㻡㼥㻯㼙㻰㼑㼏㼍㼥㻌㻴㼑㼍㼠㼇㼃㻛㼗㼓㻙㻴㻹㼉㻡㻜㻚㻜㻠㻜㻚㻜㻟㻜㻚㻜㻞㻜㻚㻜㻝㻜㻚㻜㻜㻚㻜㻜㻜㻚㻞㻜㻚㻠㻜㻚㻢㻜㻚㻤㻝㻝㻚㻞㻝㻚㻠㻯㼡㼞㼕㼡㼙㻌㼞㼍㼠㼕㼛㻌㼛㼚㻌㼁㻙㻯㼙㻌㼒㼡㼑㼘㼇㻑㼉㻝㻚㻢㻝㻚㻤㻞㻰㼑㼏㼍㼥㻌㻴㼑㼍㼠㻌㼛㼒㻌㼁㻙㻯㼙㻌㼒㼡㼑㼘Fig.7 Decay Heat of U-Cm fuel ࡲࡓ㸪௒ᅇࡣྛィ⟬ࣃࢱ࣮ࣥ࡟ࡘ࠸࡚ᔂቯ⇕ࡀ᥇⏝ࡋࡓᔂቯ⇕ࡢୖ㝈್࡜୍⮴ࡍࡿ᫬ࡢCm ࡢῧຍ㔞ࢆồࡵࡓࠋࡑࡢ⤖ᯝ࡟ࡘ࠸࡚ Tableϩ࡟♧ࡍ㸦㸰ࠋࡲࡓ㸪ྛ෭༷ᮇ㛫⏤᮶ࡢ Cm
࡟ࡘ࠸࡚㸪ࡑࡢῧຍ㔞࡛ࡢ⇞↝ィ⟬ࢆ⾜ࡗࡓࠋTable䊡㻌 Add Curium ratio
Condition Add Curium ratio
U-30yCm

0.780%

U-40yCm

0.865%

U-50yCm

0.989%

U-60yCm

1.17%

U-65yCm

1.29%

 㸳㸬㸰 Cm ࢆῧຍࡋࡓ U ⇞ᩱࡢ⇞↝ィ⟬࡟㛵ࡍࡿ⤖ᯝ U-30yCm ࠿ࡽ㸪U-50㹷Cm ࡲ࡛ࡢ⇞↝ᗘ࡟ࡼࡿ↓㝈ቑಸ⋡ኚ໬ࢆ Fig.8 ࡟♧ࡍࠋ୍␒ୗࡣ୍⯡ⓗ࡞ PWR ࡢྠ≉ᛶ࡛࠶ࡿࠋ୍⯡ⓗ࡞ PWR ࡟ẚ࡭㸪Cm ࢆῧຍࡋࡓ⇞ᩱࡣ᭱኱⇞↝ᗘࡀఙࡧ࡚࠸ࡿ஦ࡀศ࠿ࡿࠋࡲࡓ㸪㸱❶࡛㏙࡭ࡓࡼ࠺࡟㸪Cm ࡣ⥺ฟຊࢆ㧗ࡵࡓሙྜ࡟⇞↝ᗘࡀఙࡧࡿ஦ࡀศ࠿ࡗ࡚࠸ࡿࠋࡑࡇ࡛㸪Fig.8 ࡢ Cm ῧຍ⇞ᩱࢆ㸪⥺ฟຊࢆ 1.5 ಸ࡟㧗ࡵ࡚ィ⟬ࡋࡓ⤖ᯝཬࡧ㸪ẚ㍑ࡢࡓࡵࡢ Fig.8 ࡜ྠᵝࡢࢢࣛࣇࢆ Fig.9 ࡟♧ࡍࠋ
 Fig.9 ࠿ࡽ㸪U ࡟ Cm ࢆῧຍࡋࡓ⇞ᩱࡣ㸪⥺ฟຊࢆ㧗ࡵ࡚ࡶ᭱኱⇞↝ᗘࡀ㧗ࡲࡿຠᯝࡀṤ

⅔≀⌮ࡢ◊✲ࠉ➨ྕࠉ㸦ᖺ᭶㸧࡝ぢࡽࢀ࡞࠸஦ࡀศ࠿ࡿࠋࡇࢀࡣ㸪ῧຍࡉࢀ࡚࠸ࡿ Cm ࡢ⤯ᑐ㔞ࡀከࡃ࡚ࡶ 1.3㸣⛬ᗘ࡜ࡈࡃᚤ㔞࡞ࡓࡵ㸪244Cm ࠿ࡽࡢ⇞↝ࢳ࢙࣮ࣥ࡟ࡼࡿຠᯝࡀⓎ᥹ࡉࢀ࡞࠿ࡗࡓࠋ࡜࠸࠺஦ࡀཎᅉ࡜ࡋ࡚⪃࠼ࡽࢀࡿࠋ㻝㻚㻣㻝㻚㻢䠟䡉ῧຍ⇞ᩱ

㼠㼥㼜㼕㼏㼍㼘㻌㻸㼃㻾㻟㻜㼥㻯㼙㼋㻞㻜㼃㻠㻜㼥㻯㼙㼋㻞㻜㼃㻡㻜㼥㻯㼙㼋㻞㻜㼃㻝㻚㻡㼗㻙㼕㼚㼒㼕㼚㼕㼠㼥㻝㻚㻠㻝㻚㻟㻝㻚㻞㻝㻚㻝୍⯡ⓗ䛺䠱⇞ᩱ㻝㻜㻚㻥㻜㻚㻤㻜㻚㻜㻡㻚㻜㻝㻜㻚㻜㻝㻡㻚㻜㻞㻜㻚㻜㻞㻡㻚㻜㻟㻜㻚㻜㻮㼡㼞㼚㼡㼜㼇㻹㼃㻰㻛㼀㼉㻟㻡㻚㻜㻠㻜㻚㻜㻠㻡㻚㻜㻡㻜㻚㻜Fig.8 Burn up behavior of U-Cm fuel䠟䡉ῧຍ⇞ᩱ୍⯡ⓗ䛺䠱⇞ᩱ

Fig.9 Burn up behavior of U-Cm fuel when liner power 180W/Cm to 270W/Cm

 ᚑࡗ࡚㸪Cm ࢆῧຍࡋ࡚᭱኱⇞↝ᗘࡀఙࡧࡿຠᯝࡣ㸪᰾ศ⿣ᛶ᰾✀࡛࠶ࡿ 245Cm ࡟⏤᮶ࡍࡿࡶࡢ࡜⪃࠼ࡽࢀࡿࠋᚑࡗ࡚㸪U ⇞ᩱ࡟ Cm ࢆῧຍࡍࡿሙྜࡣ㸪୍ࡘࡣ෭༷ᮇ㛫ࢆ㛗ࡃ࠾ࡃ஦࡟ࡼࡗ࡚㸪ࡼࡾ Cm ୰ࡢ᰾ศ⿣ᛶ᰾✀ࡢ๭ྜࡀ㧗ࡲࡿ㸪ࡶ࠺୍ࡘࡣᔂቯ⇕ࡀపࡃ࡞ࡾ㸪ࡼࡾከࡃࡢ Cm ࢆῧຍ࡛ࡁࡿࡓࡵ㸪⤖ᯝⓗ࡟ከࡃࡢ᰾ศ⿣ᛶ᰾✀ࡀ⇞ᩱ࡟ῧຍࡉࢀࡿ࡜࠸࠺㸰ࡘࡢຠᯝ࠿ࡽ෭༷ᮇ㛫ࡀ㛗࠸ Cm ࢆ⏝࠸ࡓ᪉ࡀ᭱኱⇞↝ᗘࢆ㧗ࡵࡿຠᯝࡀ㧗ࡃ࡞ࡿ࡜ண᝿ࡉࢀࡿࠋ

⅔≀⌮ࡢ◊✲ࠉ➨ྕࠉ㸦ᖺ᭶㸧ࡑࡇ࡛㸪ࡉࡽ࡟෭༷ᮇ㛫ࢆ࠾࠸ࡓ U-60㹷Cm ཬࡧ U-65yCm ࡟ࡘ࠸࡚㸪ྠᵝࡢ⇞↝ィ⟬ࢆ⾜ࡗࡓࠋࡑࡢ⤖ᯝࢆ Fig.10 ࡟♧ࡍࠋ㻝㻚㻤60䡕ཬ䜃65䡕䠟䡉ῧຍ⇞ᩱ㻝㻚㻣㼠㼥㼜㼕㼏㼍㼘㻌㻸㼃㻾㻡㻜㼥㻯㼙㼋㻞㻜㼃㻢㻜㼥㻯㼙㼋㻞㻜㼃㻢㻡㼥㻯㼙㼋㻞㻜㼃㻡㻜㼥㻯㼙㼋㻞㻜㼃㼋㻸㻼㻞㻣㻜㻝㻚㻢㼗㻙㼕㼚㼒㼕㼚㼕㼠㼥㻝㻚㻡㻝㻚㻠㻝㻚㻟㻝㻚㻞㻝㻚㻝୍⯡ⓗ䛺䠱⇞ᩱ㻝50䡕䠟䡉ῧຍ⇞ᩱ㻜㻚㻥

⣙10GWD/T㻜㻚㻤㻜㻚㻜㻡㻚㻜㻝㻜㻚㻜㻝㻡㻚㻜㻞㻜㻚㻜㻞㻡㻚㻜㻟㻜㻚㻜㻮㼡㼞㼚㼡㼜㼇㻳㼃㻰㻛㼀㼉㻟㻡㻚㻜㻠㻜㻚㻜㻠㻡㻚㻜㻡㻜㻚㻜Fig.10 Burn up behavior of 60y and 65y U-Cm fuel ඛࡢண᝿ࡢ㏻ࡾ㸪෭༷ᮇ㛫ࡀ㛗࠸౑⏝῭ࡳ⇞ᩱ࠿ࡽࡢ Cm ࢆ⏝࠸ࡓ᪉ࡀࡼࡾ᭱኱⇞↝ᗘࡀ㧗ࡲࡾ㸪U-65yCm ⇞ᩱ࡛ࡣ㸪᭱኱⇞↝ᗘࡢఙࡧࡀ⣙ 10GW㹢/㹲࡜࡞ࡿࡇ࡜ࡶศ࠿ࡗࡓࠋ㸴㸬⤖ゝ ࡇࢀࡲ࡛ࡢ⤖ᯝ࠿ࡽ㸪௨ୗࡢ஦ࡀุ᫂ࡋࡓࠋձ 㧗ࣞ࣋ࣝᨺᑕᛶᗫᲠ≀࡛࠶ࡿ Cm ࢆ⏝࠸࡚㸪U ⇞ᩱࡢ⇞↝ᗘࢆ 10GWd/t ⛬ᗘ㧗ࡵࡿ஦ࡀฟ᮶ࡓࠋ
ղ ඲⅔ᚰ Cm ࡢ⅔࡜␗࡞ࡾ㸪U ⇞ᩱ࡟ Cm ࢆῧຍࡍࡿሙྜࡣ㸪ࡼࡾ෭༷ᮇ㛫ࡀ㛗࠸౑⏝῭ࡳ⇞ᩱ࠿ࡽࡢ Cm ࢆ⏝࠸ࡿ᪉ࡀⰋ࠸ࠋࡇࢀࡣ Cm ࡢῧຍ㔞ࡀᑡ࡞ࡃ࡞ࡿⅭ㸪244Cm ࠿ࡽࡢ⇞↝ࢳ࢙࣮ࣥຠᯝࡀ㢧ⴭ࡟ࡣ⌧ࢀ࡞࠸஦㸪෭༷࡟ࡼࡿᐇຠⓗ࡞⃰⦰ࡢຠᯝཬࡧ㸪ᔂቯ⇕ࡢపୗ࡟ࡼࡿ Cm ῧຍ㔞ࡢቑ኱࡜࠸࠺⌮⏤࠿ࡽ࡟ࡼࡿࠋࡲࡓ㸪Cm ࡢῧຍ㔞ࡣᔂቯ⇕࡟ไ㝈ࡉࢀࡿⅭ㸪ᔂቯ⇕ࢆ⪃៖ࡋ࡞ࡃ࡚Ⰻ࠸ U ⇞ᩱ࡞ࡽࡤ㸪ᵝࠎ࡞⃰⦰ᗘࡢ⇞ᩱ࡟࠾࠸࡚㸪ྠᵝ࡟⇞↝ᗘࢆ㧗ࡵࡿຠᯝࡀᚓࡽࢀࡿ࡜⪃࠼ࡽࢀࡿࠋ 㧗ࣞ࣋ࣝᨺᑕᛶᗫᲠ≀࡛࠶ࡿ Cm ࢆ㸪⇞ᩱ࡟ῧຍࡋ࡚ά⏝ࡍࡿᡭἲࢆᮏ◊✲࡛ࡣᥦ᱌ࡋࡓࠋᑗ᮶ⓗ࡟ Cm ࢆྵࡴ MA ࢆ฼⏝ࡍࡿሙྜ࡟㸪ᮏ◊✲ࡢᡂᯝࡢᛂ⏝ࡀᮇᚅ࡛ࡁࡿࠋཧ⪃ᩥ⊩
㸦㸯㸧Kawaguchi, K. et al 㸪GLOBAL 2007 㸪Boise, 㸦2007㸧 p.290-295, in CD-ROM.
㸦㸰㸧ᮌᮧ♩㸪ྜྷ⏣ṇ ᪥ᮏཎᏊຊᏛ఍⛅ࡢ኱఍ண✏㞟(CD-ROM) Vol.2008, C14 㸦㸱㸧ᮌᮧ♩㸪ྜྷ⏣ṇ ᪥ᮏཎᏊຊᏛ఍᫓ࡢᖺ఍ண✏㞟(CD-ROM) Vol.2009, K03