Diapositiva 1

1
WP1.5 Progress Meeting KTH / Stockholm, May
22-23, 2007
EUROTRANS DM1
Preliminary T/H Analyses for EFIT-MgO/Pb Reactor
Design
G. Bandini, P. Meloni, M. Polidori
Italian Agency for new Technologies, Energy and
Environment,Advanced Physics Technology
Division Via Martiri di Monte Sole 4, 40129
Bologna, Italy
2
Objectives

• Support the design phases of EFIT reactor with
  safety analysis at nominal and accidental
  conditions starting from
• development of a Neutronic/Thermal-Hydraulic
  coupled model of EFIT Subcritical Reactor for
  PARCS v1.01 /RELAP5 3.2.2b code, just widely used
  in PDS-XADS project
• adaptation of the model for the new versions of
  the codes to take advantage of the multigroup
  diffusion equation solution in hexagonal geometry
  of PARCS v2.4 and the upgrade at the RELAP5 mod3.3

EUROTRANS-DM1 WP1.5 Progress Meeting
KTH - Stockholm, May 22/23 2007
3
EFIT Core Section
Target Unit 19 Central Positions Active Zone
Positions 180 Inner Zone 42 FA Intermediate
Zone 66 FA Outer Zone 72 FA Reflector Zone
252 Positions For Dummy Assemblies and Absorber
Elements
EUROTRANS-DM1 WP1.5 Progress Meeting
KTH - Stockholm, May 22/23 2007
4
Neutronic Design
EUROTRANS-DM1 WP1.5 Progress Meeting
KTH - Stockholm, May 22/23 2007
5
RELAP5 Model of EFIT Core
Inner, Mid, Outer zones and dummybypass are
representedAverage and hot hydraulic channel
for Inner, Middle and Outer core with equivalent
flow area coupled with corresponding pin heat
structuresThe hydraulic channels are chocked to
correctly distribute mass flowrateAverage pin,
hot SA and hot pin modelled with 12 axial nodes
to simulate axial and radial power
distributionCERCER Fuel properties for Inner
(57MgO 43MOX), Middle and Outer (50MgO 50MOX)
are considered Cladding material is a
ferritic-martensitic steel (T91) with aluminium
coatingGap conductivity tuned with SIM-ADS
codeLead heat transfer coefficient Subbotin
correlation
EUROTRANS-DM1 WP1.5 Progress Meeting
KTH - Stockholm, May 22/23 2007
6
RELAP5 Nodalization Scheme of EFIT Core
AREVA Lyon October 10-11 , EUROTRANS DM 1 - WP
1.5 Progress Meeting
EUROTRANS-DM1 WP1.5 Progress Meeting
KTH - Stockholm, May 22/23 2007
7
Three Zone Core Main Parameters
AREVA Lyon October 10-11 , EUROTRANS DM 1 - WP
1.5 Progress Meeting
EUROTRANS-DM1 WP1.5 Progress Meeting
KTH - Stockholm, May 22/23 2007
8
RELAP5 Calculations
Steady state calculation at ERANOS Code nominal
conditions- Axial and Radial Form Factor
simulated,- 100 Power and Mass Flowrate, - Hot
Pin not simulated, - BOC conditions.
Steady state calculation at MCNPX Code nominal
conditions- Axial and Radial Form Factor
simulated,- 100 Power and Mass Flowrate, - Hot
Pin simulated, - BOC conditions.
EUROTRANS-DM1 WP1.5 Progress Meeting
KTH - Stockholm, May 22/23 2007
9
Steady State at ERANOS Nominal Conditions
() At max linear power elevation () At
max core elevation
EUROTRANS-DM1 WP1.5 Progress Meeting
KTH - Stockholm, May 22/23 2007
10
SS ERANOS Nominal Conditions Inner Zone
EUROTRANS-DM1 WP1.5 Progress Meeting
KTH - Stockholm, May 22/23 2007
11
SS ERANOS Nominal Conditions Mid Zone
EUROTRANS-DM1 WP1.5 Progress Meeting
KTH - Stockholm, May 22/23 2007
12
SS ERANOS Nominal Conditions Outer Zone
EUROTRANS-DM1 WP1.5 Progress Meeting
KTH - Stockholm, May 22/23 2007
13
RELAP5 Calculations
Steady state calculation at ERANOS Code nominal
conditions- Axial and Radial Form Factor
simulated,- 100 Power and Mass Flowrate, - Hot
Pin not simulated, - BOC conditions.
Steady state calculation at MCNPX Code nominal
conditions- Axial and Radial Form Factor
simulated,- 100 Power and Mass Flowrate, - Hot
Pin simulated, - BOC conditions.
EUROTRANS-DM1 WP1.5 Progress Meeting
KTH - Stockholm, May 22/23 2007
14
Steady State at MCNPX Nominal Conditions (the
whole Power generated in fuel pellets)
() At max linear power elevation () At
max core elevation
EUROTRANS-DM1 WP1.5 Progress Meeting
KTH - Stockholm, May 22/23 2007
15
SS MCNPX Nominal Conditions Inner Zone
EUROTRANS-DM1 WP1.5 Progress Meeting
KTH - Stockholm, May 22/23 2007
16
SS MCNPX Nominal Conditions Mid Zone
EUROTRANS-DM1 WP1.5 Progress Meeting
KTH - Stockholm, May 22/23 2007
17
SS MCNPX Nominal Conditions Outer Zone
EUROTRANS-DM1 WP1.5 Progress Meeting
KTH - Stockholm, May 22/23 2007
18
Steady State at MCNPX Nominal Conditions (in the
hotpin only the Power generated in pellets)
() At max linear power elevation () At
max core elevation
EUROTRANS-DM1 WP1.5 Progress Meeting
KTH - Stockholm, May 22/23 2007