JC277 and 277Z-5 are excellent high flux neutron shields due to the inclusion of temperature resistant additives that provide hydrogen for moderation and boron for thermal neutron absorption.It provides more than twice the hydrogen of ordinary concrete (equal to approximately ½ that of pure water) along with a boron content of 1.6% and 5% respectively.
Power reactor and other industrial neutron shielding applications often require a material that exhibits a high-temperature resistance.Kretekast is a refractory material that retains its shielding properties at temperatures up to 450°F (230 °C) and its physical integrity up to 1900°F (1038 °C). It is entirely non-combustible and is designed to be cast in the field.
JC277 is provided as a dry mix for casting in the field.It can be shaped using standard concrete cutting/drilling tools.Kretekast is typically provided in 300lb fibre barrels.
Approximately 96lbs. of dry mix are required to obtain one-cubic ft. of cast material. (1.54 kg of dry mix will give one litre). Detailed mixing instructions are provided with each order.Recommended shelf-life under dry storage conditions is twelve months.
Features at a glance
Contains more than two times as much hydrogen as ordinary concrete along with 1.6% to 5% boron additives
Rugged “concrete-like” shielding is easily cast in the field
