[en] A value-impact assessment is made of alternate containment concepts for commercial light water reactor power plants. Several alternate containment concepts are evaluated and compared considering their potential for reducing public risk and their construction cost. The results and methodology of the Reactor Safety Study (WASH-1400) are used as a basis for determining potential risk reductions that could be realized by alternate containment designs. Among the alternatives considered, filtered atmospheric venting appears to offer the greatest potential for reducing public risk for the least impact