Proposal transaltion 1525

Yuzo Uehara’s proposal (tweet 1525)

(original)
福島原発への提言1525;カルバートユニットの内部は鉛ブロック積むため250mのばすと線量高い地点に来るため人の通路はわずかのスペース。先端の開口は1m厚さの鉛壁で真ん中はマンホールと配管とケーブルのペネトレーションを設け貫通できるように。(続く)

(rough translation)
1525: Because lead blocks placed inside of the culvert unit, if it were extended to 250m, it would reach to the high radiation point, and there would be a small space left for workers passing through. The top part is 1m thick lead wall; and manhole, pipelines, and ventilation are installed in the center part for penetration. (cont.)