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An 18 year old EPR type compound insulated cable was removed from service for the purpose of evaluating its condition.A.C. Breakdown tests, microscopic examination, moisture analysis, tensile/elongation, and a U-Bend plate test were performed on various pieces of this cable. Based on the results obtained and supported by the trouble free performance of other cables of this type on Northeast Utilities' system, it is concluded that cables of this particular type will provide trouble free service over the expected lifetime (at least forty years) of these cables.

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The three boxes being reviewed all operate at a pressure of less than 15 psig. Since they are relieved at 13 psig, they fall outside the scopes of the ASME Pressure Vessel Code, Fermilab Engineering Standard SD-37B, and Chapter 5031 of the Fermilab Safety Manual, therefore a Pressure Vessel Engineering Note showing compliance with SD-37B is not required.In calculating the design stresses, only the largest of the three boxes, the signal board feed-thru box, was analyzed. This box had the largest spans and areas and would experience the largest pressure-related forces. The thinnest walls of each box were found to be in the top plates and they were also the side of the box which exposed the largest amount of area to internal pressure. The signal board feed-thru box top plate had at least twice the pressure area than either the instrumentation or hi-voltage boxes' top plates. This large disparity overshadows the slight difference in top plate thicknesses between the three boxes (0.56" vs. 0.25" and 0.3125", respectively). Therefore, we felt the analysis of the larger signal board feed thru box would justify the design of the smaller instrumentation and hi-voltage boxes. Appended to the end of this engineering note are the weld procedure, assembly report and the pressure test procedure & results for the signal feed-thru box. Also, included as a reference is a list of the drawing numbers for the parts and assembly of the signal board feed-thru, instrumentation and hi-voltage boxes. 3. Weld the inside of the end plates, (MD-224535), using the weld relief as filler material. After the bOI has cooled/weld the top Plate(ME-224453~to the side flange(ME-224536)nd then to the bottom PlatelME-224S3~.. Upon delivery of the 8 machined plates they were inspected for any deviations from the detail drawings. AH measurements made were within the set tolerances and they were submitted for welding. ~~Welding of the plates falls into two cara~OrieSf ¢~tside fusion welds, and inside fillet welds. Because fillet welds require more heat and longer time spent in any given place, these are the most critical. As in all of our (-ap;;;j~~g-304 Stainless ~a 308L filler rod was used.The bOI was clamped together to check fit and that all joints/-:were as expected. A learned group of indivduals was then assembled to discuss the technique for best welding results. All concured that weld reliefs on the inside of the bOI would be the safest method for reducing the warp due to contraction of the cooling weld area. It was also noted that some of the plates had been drawn withl/16 .. chamfers on the edges. We will rework these by A building up weld ma1'rial then remachining to sharp 90 degree edges.Revised drawings were generated removing the chamfers and adding 1/16" 1/16" weld reliefs to the end plates.Reassembly of the bOI took place on November 9 and welding began if ..--.-~'----that afte~noon. Welding was done by the'weld procedurCl(&ttachei(~to-tru.s-. '.---------'lDeinO... During the leak check which followed three small leaks were detected, a...