NUCLEAR REQUIREMENTS FOR CONTROL MATERIALS
Nuclear factors that effect the effectiveness of control rod materials for power reactors with a thermal or near thermal neutron spectrum are described. The principal elements and isotopes which qualify as neutron absorbers are described and physical requirements, such as, rod thickness, surface density, and weight ratios are compared. The importance of epithermal absorption and the nuclear effects of burnup as a result of long neutron exposure in power reactors are shown. The characteristics of absorption isotope chains, such as, europium are described, and finally, the deleterious effects of cladding and scattering cross section of poison diluents on control effectiveness are shown. (auth)
- Research Organization:
- Knolls Atomic Power Lab., Schenectady, N.Y.
- DOE Contract Number:
- W-31-109-ENG-52
- NSA Number:
- NSA-12-010998
- OSTI ID:
- 4333115
- Report Number(s):
- KAPL-M-HS-9
- Country of Publication:
- United States
- Language:
- English
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