Experiment data report for semiscale Mod-1 Tests S-01-4 and S-01-4A (isothermal blowdown with core resistance simulator)

Impact of new measurements of oxygen collision‐induced absorption on estimates of short‐wave atmospheric absorption

“…Using the mean integrated intensity values of pure oxygen and oxygen-nitrogen spectra for these 5.0 bar cases resulted in an ef ciency factor of 0.26 for nitrogen as a collision partner if compared with oxygen itself (see the appendix). This is in reasonable agreement with the value of 0.3 reported by Ketelaar (1955) and Badger et al (1965), and somewhat higher than the value of 0.2 adopted by Zender (1999). It can also be observed that the ef ciency of argon molecules as a collision partner is about the same as that of nitrogen, considering the uncertainties in the present data.…”

“…Solomon et al (1998), and references therein) and its possible contribution to the anomalous short-wave absorption problem has been the focus of several recent studies (e.g. Pfeilsticker et al 1997;Mlawer et al 1998;Solomon et al 1998;Zender 1999). Greenblatt et al (1990) carried out laboratory measurements of the cross-sections over the visible/near-ultraviolet (visible for short) and 1.06 ¹m bands, which form the basis for some of the subsequent estimates of the global effect of the collision-induced short-wave absorption by oxygen summarized in Table 1.…”

“…But the differences between global estimates (especially between gures from Mlawer et al (1998) and Solomon et al (1998)) are mainly associated with differences in the cross-sections. Zender (1999) used a GCM to obtain a temporal and spatial distribution of the effect of oxygen collision pairs on atmospheric absorption using Solomon et al's (1998) binary cross-sections. He considered the binary cross-sections constant with temperature and made particular choices for the scaling factor between integrated intensities of the 1.06 ¹m and 1.27 ¹m bands and for the ef ciency of nitrogen as a collision partner from the range of values summarized by Solomon et al (1998).…”

Quarterly technical report on water reactor safety programs sponsored by the Nuclear Regulatory Commission's Division of Reactor Safety Research, January--March 1975

“…of fuel and cladding, energy required for heat of fusion, volume increasing at melting ( 4) Eff~:.ct of axial variation of gap temperature and gap thickness on pressure (5) All the modes of heat transfer from the cladding to coolant previously considered in the HEAT -1 Code.…”

“…The relative influence of parameters that affect maximum surface temperatures, the effect of initial reactor conditions, and the effect of the potential experiment variables are discussed ip the following sections. 5. 3 .I Effect of Initial Reactor Conditions.…”