Abstract
Nickel ion deposit was produced on a heated rod surface in high pressure boiling water (150|285°C, 0.4|7.0MPa). The deposit under the same temperature and pressure conditions as those for BWR reactor water (285°C, 7.0 MPa) was identified as NiO by spectrum profile analysis of the NiLa, NiLβ and 9th-order NiKa1 lines. Deposition rate was obtained from in situ measurements of deposit thickness, by a photoacoustic method, and from chemical analysis of deposit amount. The deposition rate coefficients obtained in temperature and pressure ranges of 150|250°C and 0.4|4.α 0MPa were 2x 10-3|5x 10-2, which were 0.15|0.45 times as large as those of iron crud. This was attributed to a dissolution effect of Ni ion from NiO. The deposition rate coefficient at 285°C, 7.0 MPa was estimated to be 4.4 x 10-2|1.3 x 10-1.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 464-471 |
| Number of pages | 8 |
| Journal | Journal of Nuclear Science and Technology |
| Volume | 25 |
| Issue number | 5 |
| DOIs | |
| State | Published - May 1988 |
Keywords
- Cobalt 58
- Deposition
- Deposits
- Evaporation-dryout model
- High pressure boiling water
- Iron crud
- Nickel ions
- Nickel oxides
- Photoacoustic method
- Thickness measurement
- X-ray spectrometry
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Nuclear Energy and Engineering