Sodium thermal expansion

Reactor power is chosen in the range of 1500-2KX) MW (thermal). Sodium void reactivity effect is (0 to -0.1) x l0 The number of the zones with different enrichment is 2 or 3. A multi-batch loading scheme is assumed. The following reactivity effects are taken into account sodium thermal expansion and void reactivity Doppler effect axial core expansion radial core expansion control rod drive expansion. IPPE provides reactivity worth tables and specifies correlations for calculations of structural feedback effects of reactivity (with reference data). The duration of the LOF scenario to be computed is taken as about KXX) s. 

Table 27. Linear thermal expansion coefficient, a, of sodium chloride...

The equations are sometimes useful, but it must be borne in mind that the formulae are equations of continuous curves, whereas actual solubility curves are not usually continuous except over limited ranges of temp, determined by the stability of particular phases—e.g. hydrates. The effect of pressure on the solubility of sodium chloride has been previously indicated. C. Moller showed in 1862 that the solubility is increased by 20 and by 40 atm. press. The thermal expansion of salt soln. was also found by G. C. Schmidt to be more regular than with water. W. C. Rontgen and J. Schneider, and V. Schumann, have measured the compressibility of soln. of potassium and sodium chlorides. 

Tetrahydrophosphinine oxide 131 was reacted with dichlorocarbene generated from CHC13 by addition of sodium hydroxide under phase-transfer conditions to give adduct 140 which underwent thermal expansion to give 2,7-dihydrophosphepin oxide 141 <1998JCM210> (Equation 29). 

The internal energy of metallic sodium is shown as a function of volume in Fig. XIII-2, as an illustration. On account of the large compression that can be attained with sodium, more terms of the power series must be retained than are given in Eq. (2.1), but it is easier to show the properties of this metal than of a less compressible one. Let us consider the behavior of the internal energy as a function of volume at fixed temperature. If the thermal expansion is independent of temperature, so that Pq... 

When fluxing action is needed during melting, and glass with high thermal expansion is undesirable, boric oxide is added forming borosilicate glasses, which have lower thermal expansion and improved resistance to attack by aqueous solutions because of lower sodium oxide contents. 

The solvent used by Marmur and Doty (1962) was 0.15 M NaCl + 0.015 M sodium citrate adjusted to pH 7.0+0.3 containing about 20 pg/ml DNA. The optical density with a 1 cm light path at 260 mp of the solution was measured as a function of temperature using a spectrophotometer equipped with a variable temperature cell. Evaporation must be prevented and a correction for thermal expansion is required. is the temperature at which the absorbance increase is 50% of the final, maximum, absorbance increase. The use of other sodium ion concentrations drastically affects the results. The necessary corrections are described by Owen et al. (1969). 

It is also possible that sodium nitrate could contribute to rock disintegration by its thermal expansion on heating, as proposed by Cooke and... 

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