ATTENUATION PROPERTIES OF HIGH DENSITY PORTLAND CEMENT CONCRETES AS A FUNCTION OF TEMPERATURE
The elevated temperatures used in the test appreciably impaired the neutron and gamma attenuation properties of the two high density concretes. Nonetheless, the concretes would serve as satisfactory shield material if the reduced attenuation efficiency at the elevated temperatures were taken into account in the original reactor design. The two concretes used in the test were: (l) iron limonite, which consists of an aggregate of iron punchings and a grout of limonite, and iron ore containing water of hydration, and (2) magnetite limonite in which the non-hydrated iron ore magnetite is used as an aggregate and the limonite again is the grout material. Significant changes in attenuation effectiveness were found as the concretes were heated to 100 and 175 deg C, but very little change was effected in the final heating to 320 deg C. The density of the concretes was similarly effected, indicating thnt the bulk of the water had been evolved at 175 deg C and that the water which remained was more tightly bound. Because of this apparent saturation effect it should be possible to extrapolate the attenuation properties to slightly higher temperatures than those used if future laboratory tests were to show that no signfficant change in density and water content took place at the proposed temperature. (auth)
- Research Organization:
- General Electric Co. Hanford Atomic Products Operation, Richland, Wash.
- DOE Contract Number:
- W-31-109-ENG-52
- NSA Number:
- NSA-12-006309
- OSTI ID:
- 4331636
- Report Number(s):
- HW-54656
- Country of Publication:
- United States
- Language:
- English
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