No abstract

This report has been reproduceddirectly from the best availablecopy. This report was prepared as an account of work sponsored by en agency of the United States Government.Neither the United States Governmentnor any°a gency thereof, nor any of their employees, makes any warranty, express or implied,or assumes any legal liabilityor responsibilityfor the accuracy, com-4 pleteness, or usefulnessof any information,apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer,or otherwise, does not necessarilyconstitute or imply its endorsement, recommendation,or favoringby the United States Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Governmentor any agency thereof.

Forty two full-size Charpy specimens were machined from eight trepans that originated from the Japan Power Demonstration Reactor (JPDR). They were also successfully tested and the preliminary results are presented in this report. The trends appear to be reasonable with respect to the location of the specimens with regards to whether they originated from the beltline or the core regions of the vessel, and also whether they were from the inside or outside regions of the vessel wall. A short synopsis regarding commissioning of the facility to machine irradiated materials is also provided.