# US 4,400,623 A · Radiation attenuation system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 4,400,623 A - Document ID: US4400623A - Status: Granted - Kind: A - Application number: 06/222,082 - Filed: 1981-01-02 - Granted: 1983-08-23 - Earliest claimed: 1981-01-02 - Assignees: Nuclear Power Outfitters - Inventors: Earl B. Jacobson - Web page: https://patentgrep.com/patent/US4400623A ## CPC - G21F 3/00: Shielding characterised by its physical form, e.g. granules, or shape of the material - G21F: PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR (radiation protection by pharmaceutical means A61K8/00, A61Q17/04; in cosmonautic vehicles B64G1/54; combined with a reactor G21C11/00; combined with X-ray tubes H01J35/16; combined with X-ray apparatus H05G1/02) ## Abstract A portable self-supporting modular radiation attenuation system formed from a plurality of modules secured to one another in any desired alignment to protect workers from radiation exposure. The modules are hollow containers shaped to mate with one another when secured thereto such as by strapping. The modules can be a single height or stacked and include ports for filling the modules with attenuation fluid when assembled and emptying them when they are to be removed. The modules mate with one another to eliminate radiation paths between the assembled modules. The modules can be formed from fiberglass and can include internal reinforcing to maintain the mating shapes. ## Claims ### Claim 1 A self-supporting modular radiation attenuation system comprising: a plurality of interengaging radiation attenuation module elements, each element adapted to be substantially filled with a radiation attentuating fluid when positioned where desired; each of said module elements including complementary interengaging surface portions configured to nest within a substantially complementary portion of an adjacent module to substantially eliminate when assembled directed radiation paths between assembled module means while accommodating substantial nested cumulative misalignment; and each of said module means including retention means adapted for securing said module means to one another in any desired alignment within the limits of said nested relationship, whereby said elements may be arranged with respect to each other to accommodate and shield an irregular surface. ### Claim 2 (depends on 1) The radiation attenuation system according to claim 1 wherein: said assembly means include at least a pair of straps; and a pair of mounting means each including an opening adapted to pass a strap from an adjacent module means therethrough to secure said module means to one another. ### Claim 3 (depends on 1) The radiation attenuation system according to claim 1 wherein: at least one of said module means include viewing port means. ### Claim 4 (depends on 1) The radiation attenuation system according to claim 1 wherein: at least one of said module means include means for indicating the fluid level in said module means. ### Claim 5 (depends on 1) The radiation attenuation system according to claim 1 wherein: each of said module means include means adapted to stack said module means one on top of another. ### Claim 6 (depends on 1) The radiation attenuation system according to claim 1 wherein: said module means include internal reinforcing means. ### Claim 7 (depends on 1) The radiation attenuation system according to claim 1 wherein: said module shaped means include an elongated body which includes a concave surface on a portion of said body and a conforming convex surface on a second portion of said module means. ### Claim 8 (depends on 1) The radiation attenuation system according to claim 1 wherein: said module means include internal reinforcing means. ### Claim 9 (depends on 8) The radiation attenuation system according to claim 8 wherein: said reinforcing means extend substantially the length of said body on the inside of said concave surface to maintain said shape. ### Claim 10 (depends on 1) The radiation attenuation system according to claim 1 wherein: said module means include port means for filling and removing the fluid from said module means. ### Claim 11 (depends on 10) The radiation attenuation system according to claim 10 wherein: said port means include means for substantially completely filling and substantially completely emptying said module means. ### Claim 12 (depends on 1) The module according to claim 1 wherein: said container body is an elongated body which includes a concave surface on a portion of said body and a conforming convex surface on a second portion of said body. ### Claim 13 (depends on 1) The module according to claim 1 wherein: said body includes internal reinforcing means. ### Claim 14 (depends on 1) The module according to claim 1 wherein: said reinforcing means extend substantially the length of said body on the inside of said concave surface to maintain said shape. ### Claim 15 (depends on 1) The module according to claim 1 wherein: said port means include means for substantially completely filling and substantially completely emptying said body.