Project 12.2 = Fhonex - D. Phillips The same type of concrete and pareffin shield was qiready eonatructed for BLACKFOOT as had been designed f FRIF), The necessary modifications vere also cimtlar except thet there vaso little gare time available, One of the three phonex stations for BR teacercor) was elininated (600 yde.), leaving the 300 yd. and "490 ya. erations, The Line of aight to the 300 yd. otetion vas through a 3° I. D. transite pips with $° wall, from the concrete and pareffia shield. This pipe was removed © The only tkiek vall heavy material tubing awallable wes a piece of stainless steel 2° 1. 3. with 3/4" wall, This vas wrapped with 1/8 lead sheet,’ lesving approsimately 1/8" elearanse betveen the lead ani eoncrete or pareffia. This space waa filled, after onrefu) eligament, vith a thin concrete grout. The plyvecd liner of the reeteagulear aperture was also rencved and the sane type of 3/4° wall stainless steel tube wrapped with 1/8" lead we carefully fined in position. A thianer willed tebe we placed along the J-13 lime of sight through the shield. The space around these pipes was then filled vith eonerete grout. Gopt that 14 was extensively sand tagged. Fvery effort was made to Peduce the blackening of the C2 emulsions at the 300 pi. station. Pour inches of lead shielding was constructed on top, front ami beth sides of the eollimstor block, This was built from 1100 leed triaks vith lead vool ebinking, The front blast plate had three 1d” 1. 0. tubss 6° long welded BEST AVAIL ASLE COPY -%Me yores EL tha orn ri tee Bo partioular precautions vere taken vith the 450 yi. station on- ant ay RL 3¢ 3