A new physics design of control safety rods for prototype fast breeder reactor

Calibration free laser ablation molecular isotopic spectrometry (CF-LAMIS) for boron isotopic composition determination

“…24,25 Even with all these advantages, it is practically impossible to do B-IC using LIBS, as the isotope shis of atomic peaks are very small. 11 B isotopic shis at 249.7 nm and 208.9 nm relative to 10 B are +0.00085 nm and +0.0025 nm, respectively. 26 It is generally not possible to analyze boron using traditional emission spectroscopic methods due to its small isotopic shis.…”

“…The naturally occurring boron (B) isotopes, 10 B and 11 B, are found in approximately one to four ratio. 1 The mass difference between the two B isotopes is approximately 9.48%, which accounts for the differences in their composition.…”

“…1 The mass difference between the two B isotopes is approximately 9.48%, which accounts for the differences in their composition. Both have high mobility and volatility in an aqueous environment, leading to naturally occurring variations in their isotopic composition (IC) (d 11 B ∼90&; d 11 B = [( 11/10 B Sample / 11/10 B SRM951 ) − 1] × 10 3 ). 2 The variation in B-IC has plenty of applications in various elds of science and technology.…”

“…65% enriched B as B 4 C is the proposed control rod for proto-type fast breeder reactors (PFBRs). 10,11 Boron is also used as a source of short-lived alpha particles in a cancer treatment technique called Boron Neutron Capture Therapy (BNCT). In addition to the elds mentioned above, B-IC is an inevitable factor in hydrology, oceanography, environmental sciences, etc.…”

Design of instrumentation for control and safety rod drive mechanisms of prototype fast breeder reactor

“…The linear speed is selected based on the prompt criticality consideration, limit on reactor period, limit on positive reactivity addition, allowed rate of temperature rise/drop for thermal shock considerations, desired power at criticality (for accurate flux measurement) and effect of uncontrolled withdrawal event. The physics design of CSR is elaborated in Devan et al (2008). Manual power control is done by push button inching operation.…”