RESULTS OF IMPLEMENTATION RESULTS OF IMPLEMENTATION OF NEW PROMPT FISSION OF NEW PROMPT FISSION

NEUTRON SPECTRA DATA IN NEUTRON SPECTRA DATA IN ROSFONDROSFOND

Gennady Manturov, IPPEGennady Manturov, IPPE

2nd RCM Prompt Fission Neutron Spectra,13-16 December 2011, Vienna, Austria

2

Introduction

The main goal of the work is to use critical The main goal of the work is to use critical experiments for investigation of influence and testing experiments for investigation of influence and testing of PFNS data for 235U and 239Pu.of PFNS data for 235U and 239Pu.

International Handbook of Evaluated Criticality Safety Benchmark Experiments includes detailed descriptions of conditions and results of near 5000 critical experiments performed in many countries in the world.

Hereafter a set of selected experimental configurations from ICSBEP Handbook is applied for investigation of the influence and testing of Prompt Fission Neutron Spectra for 235U and 239Pu.

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List of experiments selected for the analyses and categorized in DICE database:

for uranium fuel: HEU-METAL-FAST and HEU-SOL-THERM type. for plutonium fuel: PU-METAL-FAST and PU-SOL-THERM type.

For the most of experimental configurations input data files are constructed to perform calculations using Monte-Carlo codes MMKKENO and MCNP.

Calculation results of the selected experimental configurations was obtained using MMKKENO and MCNP:

with original ROSFOND nuclear data files, with modified ROSFOND nuclear data files, according to V.Maslov’s

recommendations for new evaluation of the Prompt Fission Neutron Spectra for 235U and 239Pu isotopes.

Introduction (cont’d)

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Selected Test Models for the Analyses

HEU-Metal-FastHEU-Metal-Fast systemssystems HEU-Sol-ThermalHEU-Sol-Thermal systemssystems

PU-Metal-FastPU-Metal-Fast systemssystems PU-Sol-ThermalPU-Sol-Thermal systems systems

So called Pruvost’s curve was selected as a test object. The So called Pruvost’s curve was selected as a test object. The curve reflects dependence of critical radius for the sphere, curve reflects dependence of critical radius for the sphere, filled with solution of plutonium (or uranium) and filled with solution of plutonium (or uranium) and surrounded by thick water-reflector, from concentration of surrounded by thick water-reflector, from concentration of plutonium (or uranium) in the solution. The minimal plutonium (or uranium) in the solution. The minimal plutonium concentration corresponds to solution with k∞ plutonium concentration corresponds to solution with k∞ equal to 1, the maximal – corresponds to metallic fuelequal to 1, the maximal – corresponds to metallic fuel

2 LMFR Test models2 LMFR Test models

Hereafter we limit self by considering practical important cases – a set of experiments PU-SOL-THERM with plutonium aqueous solutions and PU-MET-FAST with metal plutonium.

Calculation Scheme Using Group and Continuous Nuclear Data

CONSYST

ABBN group data

set

299 n + 127

FormatGMF

299 n + 15 P5

MMKKENO Group Mode

TRIGEX FFCP

MCNPGroup Mode

PRECONS

EvaluatedNuclear

Data FilesFOND-2

NJOYGRUCON

MCNPContinuous

NJOY

FormatACE

ENDF/B-6, 7JENDL-3,4JEFF-3, etc.

SUBGRAN(subgroups)

ROSFOND

Reactor Physicscodes

Monte-Carlo codes

DORT-TORT, KATRIN

Shielding

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New 239PU PFNS

Table 1 – Description of finite plutonium Pruvost’s test models

№

kg 239Pu per liter H2O

№

kg 239Pu per liter H2O

№

kg 239Pu per liter H2O

№

kg 239Pu per liter H2O

№

kg 239Pu per liter H2O

1 0.008 5 0.012 9 0.03 13 0.5 17 10.0

2 0.009 6 0.013 10 0.05 14 1.0 18 14.0

3 0.010 7 0.014 11 0.1 15 2.0 19 19.74

4 0.011 8 0.020 12 0.2 16 5.0

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Results in Pruvost’s Curve

Table 2 – Description of the PMF systems

№ ID% fissions

in E>100 keVReflector

type№ ID

% fissionsin E>100 keV

Reflectortype

1 PMF01 98 - 9 PMF12 93 Al

2 PMF22 98 - 10 PMF24 91 HCH2

3 PMF40 98 Cu 11 PMF44b 90 Fe

4 PMF23 97 C 12 PMF44a 87 Be

5 PMF10 97 U 13 PMF11 79 H2O

6 PMF28 97 SS 14 PMF37b 75 H2O

7 PMF15 96 Fe 15 PMF37f 69 H2O

8 PMF06 95 U 16 PMF16 65 H2O

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Results for PMF Systems

Effect of PFNS of PU-239, PMF Systems

-0.3

-0.2

-0.1

0

0.1

0.2

0.3

PMF01

PMF22

PMF40

PMF23

PMF10

PMF28

PMF15

PMF06

PMF12

PMF24

PMF44

b

PMF44

a

PMF11

PMF37

b

PMF37

f

PMF16

(PF

NS

/RO

SF

ON

D-1

)х1

00

%

MCNP Continuous (full)

MMKKENO 299 Group

MCNP Continuous (only spectrum)

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Results for PMF Systems (comparison to experiment)

PMF Systems, MCNP Continuous

-1.25

-1

-0.75

-0.5

-0.25

0

0.25

0.5

0.75

1

1.25

1.5

1.75

2

2.25

PMF01

PMF22

PMF40

PMF23

PMF10

PMF28

PMF15

PMF06

PMF12

PMF24

PMF44

b

PMF44

a

PMF11

PMF37

b

PMF37

f

PMF16

(Re

su

lt/E

xp

eri

me

nt-

1)х

10

0%

ROSFOND

Experiment

PFNS

13

Results for PST Systems

14

Results for PST systems (comparison to experiment)

Results for HEU Systems (last year results)

MCNP continuous, HEU

0,995

0,9975

1

1,0025

1,005

HMF00101 HMF00401 HMF01801 HMF02001

K-e

ff

EXPERIMENT

ROSFOND

MASLOV

Results for HST Systems (last year results)

MCNP continuous, HST

0,985

0,9875

0,99

0,9925

0,995

0,9975

1

1,0025

1,005

1,0075

1,01

HS

T0

01

01

HS

T0

01

02

HS

T0

01

03

HS

T0

01

04

HS

T0

01

05

HS

T0

01

06

HS

T0

01

07

HS

T0

01

08

HS

T0

01

09

HS

T0

01

10

HS

T0

09

01

HS

T0

09

02

HS

T0

09

03

HS

T0

09

04

HS

T0

10

01

HS

T0

10

02

HS

T0

10

03

HS

T0

10

04

HS

T0

11

01

HS

T0

11

02

HS

T0

12

01

HS

T0

13

01

HS

T0

19

01

HS

T0

25

01

HS

T0

25

02

HS

T0

25

04

HS

T0

25

05

HS

T0

27

01

HS

T0

28

01

HS

T0

28

03

HS

T0

28

05

HS

T0

28

07

HS

T0

28

09

HS

T0

28

11

HS

T0

28

13

K-e

ff

EXPERIMENT

ROSFOND

MASLOV

Results in Keff for LMFR

LMFR with sodium coolant -0,36%.LMFR with sodium coolant -0,36%. LMFR with lead coolant + 0,25%.LMFR with lead coolant + 0,25%.

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Thank youThank you