1. Kernforschungszentrum Karlsruhe GmbH Institut fur Reaktorbauelemente, Poslfach 3640 7500 Karlsruhe 1, Federal Republic of Germany
2. Power Reactor and Nuclear Fuel Development Corporation Oarai Engineering Center, Oarai, Japan
3. Kernforschungszentrum Karlsruhe GmbH, Institut fur Reaktorbauelemente Postfach 3640, 7500 Karlsruhe I, Federal Republic of Germany