FAST REACTORS IN MINOR ACTINIDE MANAGEMENT

ACTINIDE AND FISSION PRODUCT PARTITIONING AND TRANSMUTATION, ISBN 978-92-64-99174-3, © OECD 2012 1

Fast reactors in minor actinide management

Abstract

FAST REACTORS IN MINOR ACTINIDE MANAGEMENT

2 ACTINIDE AND FISSION PRODUCT PARTITIONING AND TRANSMUTATION, ISBN 978-92-64-99174-3, © OECD 2012

Background

Reactor core description (boundary conditions/introduction)

FAST REACTORS IN MINOR ACTINIDE MANAGEMENT

ACTINIDE AND FISSION PRODUCT PARTITIONING AND TRANSMUTATION, ISBN 978-92-64-99174-3, © OECD 2012 3

Figure 1: EFIT core and FA layouts

Figure 2: ELSY core and FA layouts

FAST REACTORS IN MINOR ACTINIDE MANAGEMENT

4 ACTINIDE AND FISSION PRODUCT PARTITIONING AND TRANSMUTATION, ISBN 978-92-64-99174-3, © OECD 2012

Table 1: EFIT and ELSY fuel isotopic composition (wt.%)

EFIT ELSY EFIT ELSY EFIT ELSY

238Pu 3.7372 2.333 237Np 100.0 100.0 234U / 0.003 239Pu 46.4456 56.873 235U / 0.404 240Pu 34.1212 26.997 241Am 82.2386 82.118 236U / 0.010 241Pu 3.8448 6.104 242*Am 0.2764 0.277 238U / 99.583 242Pu 11.8500 7.693 243Am 17.4850 17.605

243Pu /

244Pu 0.0012 243Cm 1.5405 1.533

244Cm 69.8455 69.763

245Cm 26.5103 26.588

246Cm 2.0618 2.074

247Cm 0.0372 0.039

248Cm 0.0047 0.003

ELSY core performances

FAST REACTORS IN MINOR ACTINIDE MANAGEMENT

ACTINIDE AND FISSION PRODUCT PARTITIONING AND TRANSMUTATION, ISBN 978-92-64-99174-3, © OECD 2012 5

Table 2: ELSY core neutron performances with MA in the third fuel zone

MOX 20% MA het. (%) ELSY

(%) EFIT

U-free inert matrix (%) ELSY

(%) EFIT

C(Pu)aver. 17.829 +1.278 / 22.216 +26.20 /

MA/MA+Pu 28.129 / -48.20 33.851 / -37.66

MA_mass kg 2 457.48 / -16.04 3 296.10 / +32.74

keff 1.030180.00025 / / 1.032150.00024 / /

Aver. n/cm2s 1.783E+15 -6.893 +48.34 1.796E+15 -6.214 +49.42

n-sourcen/s 1.330E+20 +1.604 +275.7 1.343E+20 +2.597 +279.4

Ppeak FA (MW) 13.919 +11.99 / 14.473 +16.45 /

PFract/Zone 0.248/0.315/0.436 +7.921(3) / 0.247/0.324/0.430 +6.436(3) /

BUEoL/Zone 62.7/77.8/92.5 +21.39(3) / 65.1/79.7/179.2 +135.2(3) /

k/kBU,Equil -0.006270.00037 |45.43| / -0.009440.00037 |17.84| /

MMA_Equil -179.2 / |11.37| -274.7 / |70.73|

MMA_EoL -647.4 / |45.92| -999.0 / |125.2|

M(kg/TWh) -9.853 / -77.59 -15.21 / -65.40

Aver.En,(MeV) 0.4218 +6.731 / 0.4320 +9.322 /

Aver. 2.9697 +1.715 -4.360 3.0033 +2.866 -2.196

Aver. 1.3185 +8.859 -12.83 1.3305 +9.849 -12.03

Conv. factor 1.2018 +26.17 -26.57 1.2418 +30.37 -24.13

eff 0.003000.00035 -11.77 / 0.003140.00036 -7.647 /

fis_lifespan sec 0.8521 E-6 -27.12 / 0.8375 E-6 -28.37 /

AD 1200->1800 K -0.003930.00088 |48.90| / -0.004390.00095 |42.91| /

vk/kAC-Void +0.047670.00037 +23.21 / +0.051930.00041 +34.22 /

Transmutation performances

FAST REACTORS IN MINOR ACTINIDE MANAGEMENT

6 ACTINIDE AND FISSION PRODUCT PARTITIONING AND TRANSMUTATION, ISBN 978-92-64-99174-3, © OECD 2012

Figure 3: ELSY and EFIT Keff BU swing

0

20

40

60

80

100

120

140

160

180

0.000 0.625 1.250 1.875 2.500 3.125 3.750 4.375 5.000

BU (GWd/tnH

M)

Years

ELSY 20%MA 1

ELSY 20%MA 2

ELSY 20%MA 3

ELSY U_free 1

ELSY U_free 2

ELSY U_free 3

EFIT Fuel 1

EFIT Fuel 2

EFIT Fuel 3

Figure 4: ELSY and EFIT BU rate

0

20

40

60

80

100

120

140

160

180

0.000 0.625 1.250 1.875 2.500 3.125 3.750 4.375 5.000

BU (GWd/tnHM

)

Years

ELSY 20%MA 1ELSY 20%MA 2ELSY 20%MA 3ELSY U_free 1ELSY U_free 2ELSY U_free 3EFIT Fuel 1EFIT Fuel 2EFIT Fuel 3

Figure 5: ELSY core mass inventory

1.E+00

1.E+01

1.E+02

1.E+03

1.E+04

0.0 1.0 2.0 3.0 4.0 5.0

Years

Mass (kg)

Np (kg) /U-free Pu (kg)/U-free

Am (kg)/U-free Cm (kg)/U-free

Np (kg) / 20% MA Pu (kg) / 20% MA

Am (kg) / 20% MA Cm (kg) / 20% MA

FAST REACTORS IN MINOR ACTINIDE MANAGEMENT

ACTINIDE AND FISSION PRODUCT PARTITIONING AND TRANSMUTATION, ISBN 978-92-64-99174-3, © OECD 2012 7

Figure 6: EFIT core mass inventory

1.E+00

1.E+01

1.E+02

1.E+03

1.E+04

0.0 0.5 1.0 1.5 2.0 2.5 3.0

Years

Mass

Np (kg) EFIT

Pu (kg) EFIT

Am (kg) EFIT

Cm (kg) EFIT

Table 3: MOX 20% MA het and U-free inert matrix transmutation performances

ELSY and EFIT cores

20% MA

het. solution U-free

inert matrix fuel EFIT core

inert matrix fuel

MA mass (kg) 2 458 3 296 2 927

MNp (kg) -12.953 -29.83 -13.81

MPu (kg) +117.72 -14.97 +0.240

MAm (kg) -780.01 -1182.95 -562.92

MCm (kg) +145.54 +213.14 +133.04

MNp (kg/TWh) -0.197 -0.454 -1.368

MPu (kg/TWh) +1.792 -0.228 +0.222

MAm (kg/TWh) -11.87 -18.01 -55.78

MCm (kg/TWh) +2.215 +3.253 +13.18

Figure 7: MA isotopic composition; MA recycling in fast reactors

0

5

10

15

2040 2080 2120 2160 2200

Time (yr)

Mass (tn)

Am241 (t) Am242m (t)

Am243 (t) Np237 (t)

Np239 (t) Cm242 (t)

Cm243 (t) Cm244 (t)

Cm245 (t) Cm246 (t)

0

5

10

15

2040 2060 2080 2100 2120 2140 2160 2180 2200

Time (yr)

Mass (tn)

Am241 (t) Am242m (t)

Am243 (t) Np237 (t)

Np239 (t) Cm242 (t)

Cm243 (t) Cm244 (t)

Cm245 (t) Cm246 (t)

FAST REACTORS IN MINOR ACTINIDE MANAGEMENT

8 ACTINIDE AND FISSION PRODUCT PARTITIONING AND TRANSMUTATION, ISBN 978-92-64-99174-3, © OECD 2012

Figure 8: MA capture and fission reactions rate (events/sec) EFIT third ring inert matrix fuel

0.E+00

1.E+18

2.E+18

3.E+18

4.E+18

5.E+18

6.E+18

0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00 2.25 2.50 2.75 3.00

Years

Events

/sec

U_(n, g) Np_(n,g) Pu_(n,g)

Am_(n,g) Cm_(n,g) U_(n, f)

Np_(n,f) Pu_(n,f) Am_(n,f)

Cm_(n,f)

Figure 9: Cm inventory without and with MA recycling in fast reactors

0

5

10

15

20

25

30

35

40

45

2000 2040 2080 2120 2160 2200

Time (yr)

M ass (tn)

Reactors

Plants

Stocks

Total

0

5

10

15

20

25

30

35

40

45

2000 2040 2080 2120 2160 2200

Time (yr)

Mass (tn)

Reactors

Plants

Stocks

Total

FAST REACTORS IN MINOR ACTINIDE MANAGEMENT

ACTINIDE AND FISSION PRODUCT PARTITIONING AND TRANSMUTATION, ISBN 978-92-64-99174-3, © OECD 2012 9

Conclusions

Acknowledgements

References

FAST REACTORS IN MINOR ACTINIDE MANAGEMENT

10 ACTINIDE AND FISSION PRODUCT PARTITIONING AND TRANSMUTATION, ISBN 978-92-64-99174-3, © OECD 2012