A string of reactant chambers configured for inserting a reactant into each reactant chamber, in the string of reactant chambers, while maintaining the reactant chamber being filled in the string of reactant chambers is provided. The string of reactant chambers has a first reactant chamber, a second reactant chamber, and a system configured to maintain the reactant chamber being filled in the string of reactant chambers. The system has a first removable end cap on each reactant chamber and a coupler on each reactant chamber configured for the removal of the first removable end cap and maintaining the reactant chamber in the string of reactant chambers. A process for charging a reactant chamber is also presently disclosed.
