Argonne National Laboratory
RERTR
Reduced Enrichment for Research and Test Reactors
Nuclear Engineering Division at Argonne
U.S. Department of Energy

RERTR Publications:
Analysis Methods for Thermal Research and Test Reactors

ANL/RERTR/TM-29

COMPUTING CONTROL ROD WORTHS
IN THERMAL RESEARCH REACTORS

TABLE 3
BROAD GROUP BLACKNESS COEFFICIENTS AND EFFECTIVE DIFFUSION PARAMETERS
FOR A HAFNIUM SLAB OF THICKNESS t = 0.500 cm

 

Quantity Group 1 Group 2 Group 3 Group 4 Group 5
Eu(eV) 1.0E+07 8.208E+5 5.531E+03 1.855 0.6249
Sa/Ss 0.01075 0.05192 0.6362 11.1581 6.5293
D(cm) 1.1018E+00 7.5354E-01 3.9258E-01 2.1924E-01 3.1425E-01
Sa(cm-1) 3.2572E-03 2.2812E-02 4.7998E-01 5.2020E+00 2.9832E+00
L(cm) 18.39 5.747 0.9044 0.2052 0.3246
t/L 0.0272 0.0870 0.5529 2.436 1.540
Sat 1.16286-03 1.1406E-02 2.3999E-01 2.6010E+00 1.4916E+00
No. of Fine Groups 1 1 32 14 21
a(P1) 8.1451E-04 5.6485E-03 1.0356E-01 4.5802E-01 3.8305E-01
a(P3) 8.1413E-04 5.6328E-03 1.0046E-01 4.3288E-01 3.6102E-01
a(P5) 8.1410E-04 5.6316E-03 1.0016E-01 4.3074E-01 3.5886E-01
<a(P5)> 8.1410E-04 5.6316E-03 1.0208E-01 4.1096E-01 3.5165E-01
<aom(P1)> 7.6051E-04 5.2312E-03 1.0070E-01 4.1707E-01 3.5647E-01
b(P1) 4.3542E+00 2.8878E+00 1.1282E+00 5.1022E-01 5.8520E-01
b(P3) 4.3541E+00 2.8869E+00 1.1191E+00 4.8566E-01 5.6261E-01
b(P5) 4.3541E+00 2.8868E+00 1.1179E+00 4.8394E-01 5.6093E-01
<b(P5)> 4.3541E+00 2.8868E+00 1.2135E+00 5.1162E-01 5.7023E-01
<bom(P1)> 3.8416E+02 5.4857E+01 4.8787E+00 5.3505E-01 6.2356E-01
EDP's*
h = t:
Deff 1.0885E+00 7.2169E-01 3.0337E-01 1.2790E-01 1.4256E-01
Sa-eff 3.2570E-03 2.2570E-02 4.4583E-01 8.3555E+00 3.6695E+00
h = t/2:
Deff 1.0885E+00 7.2134E-01 2.9685E-01 9.2318E-02 1.1541E-01
Sa-eff 3.2567E-03 2.2548E-02 4.2667E-01 3.7061E+00 2.2719E+00

*Effective Diffusion Parameters (EDP's) based on <a(P5)> and <b(P5)> values.

2016 RERTR Meeting

The 2016 International RERTR Meeting (RERTR-2016) will take place in Belgium. Stay tuned for further details.

2015 RERTR Meeting

The 2015 International RERTR Meeting (RERTR-2015) took place in Seoul, Korea on Oct. 11-14, 2015.
For more information visit RERTR-2015.


ARGONNE NATIONAL LABORATORY, Nuclear Engineering Division, RERTR Department
9700 South Cass Ave., Argonne, IL 60439-4814
A U.S. Department of Energy laboratory managed by UChicago Argonne, LLC
 

Last modified on July 29, 2008 11:32 +0200