H15 PEHD TUNNEL SAM/D11

For radiological reason, a Lead tunnel should be placed around a guide. This lead should be cover with a second skin compose with HDPE borated polyethylene – This tender concern only Plastic parts It is composed with 4 faces machined plates assemble together with screws – nearly 4 meters th 100 mm and 4 meters long assembly th.50mm split in 4 sections ~1m long + “leak covers” It is composed with PEHD 500 biggest plate is nearly 1.2 meter x 800 mm thick. 100 mm – no complex machining. See drawing below. For neutron absorbtion reason the material should contain at least 5 % of boron in weight.