From 0ff9ee38d48b12d6139890740d00697b406e5001 Mon Sep 17 00:00:00 2001 From: Dane Sabo Date: Tue, 17 Sep 2024 20:00:00 -0400 Subject: [PATCH] vault backup: 2024-09-17 20:00:00 --- .../2024-09-17 Module 5 Nuclear Fission Basics.md | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/300s School/NUCE 2100 - Fundamentals of Nuclear Engineering/2024-09-17 Module 5 Nuclear Fission Basics.md b/300s School/NUCE 2100 - Fundamentals of Nuclear Engineering/2024-09-17 Module 5 Nuclear Fission Basics.md index f63eea2f..26939384 100644 --- a/300s School/NUCE 2100 - Fundamentals of Nuclear Engineering/2024-09-17 Module 5 Nuclear Fission Basics.md +++ b/300s School/NUCE 2100 - Fundamentals of Nuclear Engineering/2024-09-17 Module 5 Nuclear Fission Basics.md @@ -40,4 +40,7 @@ There are more formulas in the slides. K can be based on material properties Fission is most efficiently caused by thermal neutrons (energy < 1eV), but neutrons from fission are born at something like \>2MeV. 7 orders of magnitude reduction -- usually kinetic losses by neutrons colliding with things. Different neutron moderators require a different number of collisions to bring the energy down to thermal. The closer the mass is to that of a neutron, the better. Hydrogen is best, then deuterium, then beryllium, then carbon (graphite). - +# Module 5.3 - PWR and BWR Reactors +Fuel pellots. Small boys. Stacked into fuel elements 12 feet high. about 300 per rod +14x14 lattice or 17x17. That is one fuel assembly. +Zirconium is used as the cladding. Low neutron absorbtion cross section.