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

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= 1 Moni<strong>to</strong>r print at each inner iteration<br />

Block-3 Floating point parameters /6/<br />

If entered =0.0 <strong>for</strong> each following item, the value in < > is substituted.<br />

1 EPSI Convergence criterion <strong>for</strong> inner iteration < 0.001 ><br />

2 EPSO Convergence criterion <strong>for</strong> outer iteration < 0.0001 ><br />

3 EPSG Extrapolation criterion < 0.001><br />

4 RELC Initial over-relaxation fac<strong>to</strong>r < 1.2 ><br />

5 OVERX Maximum extrapolation fac<strong>to</strong>r < 100.0 ><br />

6 FACTOR Relaxation fac<strong>to</strong>r <strong>to</strong> prevent divergence < 0.8 ><br />

Block-4<br />

NK(i)<br />

Number of mesh intervals by region (i)<br />

/NRMAX/<br />

Block-5<br />

IK(i)<br />

/NRMAX/<br />

Material number by region (i); the material number is assigned by the order of the<br />

material appears in the material specification (cf. Sect.2.9.)<br />

Block-6 Required even if NXR=0 /NRMAX/<br />

IXR(i) X-Region number by region. Enter all 0, if not necessary<br />

Block-7<br />

RK(i)<br />

Outer radii (distance from the origin) by region in cm.<br />

/NRMAX/<br />

Block-8 /1/<br />

BSQ Transverse buckling B 2 in cm -2 . Neutron leakage is taken in<strong>to</strong> account by pseudo<br />

absorption as<br />

Σ<br />

eff<br />

2<br />

a , g = Σ a , g + D g B<br />

Block-9 Required if IBOUND=2 /1/<br />

XLAMD <strong>Group</strong>-independent constant <strong>for</strong> the extrapolation distance. For the Milne’s<br />

problem XLAMD corresponds <strong>to</strong> 0.4692. The larger value gives shorter<br />

extrapolation distance. (cf. XMIS1 of Card-003-4 in Sect.2.8)<br />

89

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