SHIELDING OF PIPES IN THE HFIR PRIMARY COOLANT SYSTEM
The thicknesses of ordinary concrete required to shield pipes in the ORNL High Flux Isotope Reactor primary water system were computed for normal operating conditions and for abnormal conditions such as a defective fuel plate or a meltdown of the fuel within the reactor. About 6 ft of concrete is required for the pipes at the outlet of the reactor, and 2 ft of concrete is required for the pipes located about 1 1/2 min downstream from the reactor vessel-. These thicknesses of concrete reduce the radiation levels to below the specified tolerances of: (a) 0.75 mr/hr during normal operation or operation with one defective fuel plate; (b) 1 r/hr immediately after the meltdown of 1% of the fuel; and (c) 1 r/hr 24 hr after a total fuel melidown. Shielding thicknesses required for other tolerances may be estimated from graphs and tables which are presented. (auth)
- Research Organization:
- Oak Ridge National Lab., Tenn. (US)
- Sponsoring Organization:
- US Atomic Energy Commission (AEC)
- DOE Contract Number:
- W-7405-ENG-26
- NSA Number:
- NSA-14-022594
- OSTI ID:
- 4164200
- Report Number(s):
- CF-60-6-123
- Country of Publication:
- United States
- Language:
- English
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