of the jacking member 40 can be thus provided with a threaded portion 48 in order that it can be threadably associated in the above mentioned hole in the inner shell the jacking member 40 is also provided with a central hole 44 which can also be threaded in order for it to receive in threaded association the locking screw 46 or threaded member as discussed above the locking screw 46 is provided with a head 47 which has a plurality of flat sides that enable it to be turned by the use of a conventional open ended wrench after the locking screw 46 is adjusted within the jacking member 40 in order to properly position the tube support plate reference numeral 16 in fig4 the locking screw 46 can be welded to the jacking member 40 in order to rigidly attach these members together and to guarantee that no relative movement between these members occurs after installation this welded connection is illustrated by reference numeral 49 in fig4 it should be apparent to one skilled in the art that the present invention is an apparatus which is relatively easy and inexpensive to manufacture but that provides a radial support for a tube support plate in a way that can accurately adjust the position of the tube support plate within the steam generator furthermore the present invention provides a means for effectively transferring radial forces exerted by the tube support plate to the outer shell of the steam generator without requiring the inner shell of the steam generator to be significantly strengthened in the region of the tube support plate also it should be apparent that the present invention minimizes the number of components needed to be included within.