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JAEA-Data/Code 2007-004 - Welcome to Research Group for ...

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5.2 Reaction Rate Calculation (PIJ)<br />

Figure 5.2-1 shows a hexagonal array of two different fuel rods in the PROTEUS-LWHCR<br />

(CORE-6) experiment 32) simulating a high-conversion light water reac<strong>to</strong>r. Below is a sample input <strong>to</strong><br />

evaluate nuclide-wise reaction rate in two different fuels by using the neutron fluxes obtained by cell<br />

calculation with 107 group structure. The output reaction rates by this sample are fission and capture<br />

rates at energy ranges fast (1st <strong>to</strong> 67th), thermal (68th <strong>to</strong> 107th) and the whole (1st <strong>to</strong> 107th) <strong>for</strong> the<br />

nuclides U-235, Pu-239, Pu-240, Pu-241, Am-241, U-233 and Th-232.<br />

Periodic B.C.<br />

1 3<br />

1<br />

Periodic B.C.<br />

3<br />

2 2<br />

4<br />

5 5<br />

2 2<br />

5 5 5 5<br />

4 4<br />

1 1<br />

MOX<br />

5 5 5 5 5 5<br />

2<br />

4<br />

Dep.UO2<br />

2<br />

1 3<br />

1<br />

Periodic B.C.<br />

3<br />

Periodic B.C.<br />

Fig.5.2-1<br />

Cell geometry of a sample input <strong>for</strong> reaction rate calculation<br />

[ File name: React.sh ]-----------------------------------------------------------------------------------------------<br />

COR6<br />

PROTEUS-LWHCR Experiment (Core 6, 0% Void)<br />

1 1 1 1 2 1 4 3 -12 1 0 0 0 0 1 2 1 1 0 0 / SRAC Control<br />

2.0507E-3 / Buckling (Critical searced value)<br />

*- PDS files ------2---------3---------4---------5---------6---------7--<br />

/home/okumura/SRACLIB-JDL33/pds/pfast Old File<br />

/home/okumura/SRACLIB-JDL33/pds/pthml<br />

/home/okumura/SRACLIB-JDL33/pds/pmcrs<br />

O<br />

O<br />

F<br />

F<br />

/home/okumura/Mypds/React/UFAST Scratch Core<br />

/home/okumura/Mypds/React/UTHERMAL<br />

/home/okumura/Mypds/React/UMCROSS<br />

S<br />

S<br />

C<br />

C<br />

/home/okumura/Mypds/React/MACROWRK S C<br />

/home/okumura/Mypds/React/MACRO<br />

/home/okumura/Mypds/React/FLUX<br />

S<br />

S<br />

C<br />

C<br />

/home/okumura/Mypds/React/MICREF S C<br />

62 45 1 1<br />

62(1)<br />

/ 107 group => 2 group<br />

/ Energy group structure suggested <strong>for</strong> LWR analyses<br />

45(1) /<br />

62<br />

45<br />

/ Fast 1 group<br />

/ Thermal 1 group<br />

***** Enter one blank line after input <strong>for</strong> energy group structure<br />

***** Input <strong>for</strong> PIJ (Collision Probability Method)<br />

13 32 5 5 1 1 6 2 10 0 3 0 10 29 2 1 180 1 / Pij Control<br />

0 20 50 5 5 5 -1 0.0001 0.00001 0.001 1.0 10. 0.5 /<br />

198

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