31. The catastrophic fire in the graphite neutron moderator compounded the problem, sending massive amounts of radioactive debris into the atmosphere. 32. Isotopes with a large scatter cross section and have a low mass are good neutron moderators ( see chart below ). 33. Graphite and diamond are wildly different in their overt physical characteristics; likely their utility as a neutron moderator is also unrelated. 34. Whilst water acts as an efficient neutron moderator , whether an aqueous solution of urainium salts could go critical accidentally is questionable. 35. It was air-cooled, used nuclear graphite as a neutron moderator , and pure natural uranium in metal form for fuel. 36. It contained 45, 000 graphite blocks weighing used as neutron moderators , and was fueled by of uranium metal and of uranium oxide. 37. CP-5 was a thermal-neutron reactor using enriched uranium as fuel and heavy water as coolant and as a neutron moderator . 38. This suggestion, then, puts neutron moderators where it's too late for that particular property to be of any real use. 39. The S1W was a pressurized water reactor that utilized water as the coolant and neutron moderator in its primary system, and diesel propulsion systems. 40. Heavy water is a neutron moderator used in boiling water and pressurised water reactors the most common type, use ordinary ( light ) water.
