Water channels within the control rod shrouds was . They also examined scratches on the central control rod. It is usually characterized as an acronym for "safety control rod axe man". Rust flecks migrated into the coolant and lodged in critical machinery, including control rod drives. At 10&colon;37 Fermi ordered Weil to remove all but of the last control rod. Xe acts like a control rod, reducing reactivity. A high proportion of aerosol particles originates from the reactor control rod materials. The largest of these updates fixed the RBMK control rod design. The latter is used as a control rod material in both PWRs and BWRs. He was revived by Blastaar and regained his Control Rod. The burnup of "burnable poison" isotopes also limits lifespan of a control rod. Annihilus's minions captured the heroes, but they escaped, stealing his Control Rod. They can also use control rod manipulation to achieve deeper reductions in power. Walter Zinn removed the zip, the emergency control rod, and secured it. At SL-1, control rods would get stuck in the control rod channel sporadically.