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<br /> rcn ~ ~r lb:J4 rK NUKUIUN 1NItKNF7110NRL 13 592 0440 TO 12018871476 P,01i19 <br /> SAFETY CONSmERATIONS IIV T1~ <br /> OPIItA1ION OF GM~B~A PBOCFSSIIdG Fw[~rrrn:S <br /> Pos4iC Far Nob 7671 ~ P9~~ <br /> m ~ ~ <br /> Co/0e0~ ta <br /> Pna.r wrm.? <br /> IIV'IRODUCiION 20 - - ~f? ' - -okua <br /> Gamma radiation processing slatted to be comtpes+dalised in the late 1950's_ The <br /> comatesrial uses of radioactive isotopes coves a vesywide range of applications, dominated <br /> by the stersZizatioa of medical disposable itetas, following by plasdc~ modtfi,Qtion, food <br /> preservarion, waste disiafecdoa, etc. The design &A~+*~ of equipment used to perform all <br /> the above duties art basically idetttical, hence there is tto aced to disass than safety <br /> features separately. This paper wt11 ~~nn~ the general considerations is the safe <br /> operation of a general purpose universal gamma radiation processing facility The <br /> categories to be considered are <br /> a. Source Production and Safe Transport Considerations. <br /> b. Worker Safety Caasiderations. <br /> a Public Safety anti Eavirvmnental Considerations. <br /> d. Safe Operatiaa Training. <br /> COBALT 60 PRODUCTION AND ENCAPSULATION <br /> A typical cobalt 60 capsule is shown of figure #1. Cobak 59 slugs are 99.99b pure, nickel <br /> plated and welded into a rirconium alloy "Inner Capsule". Inner capsules are assembled <br /> into Reactor 7argec Bundles and placed into reactors for activation. After activation, the <br /> bundles are naasfesred into as approved shipping ooncainer and u~ansported to the Cobalt <br /> Processittg Faaliry, where they are dismantled and further sealed is stainless steel "Outer <br /> Capsules". <br /> Capsules are maaufacttued according to a very strict quality asstuance program, which <br /> includes verification of incoming mateaals and chemical analysis of material samples. To <br /> improve corrotizon resistance, the outer capsules are made from A.S'111d 316E stainless steel, <br /> which. due to its low carboy content, permiu welding with minimum carbide predpitation. <br /> SHIPPING CONTAINER D>i~ <br /> Cobalt 60 has m be shipped. Csee figure #2): <br /> - From the reactor to the processing faaZity. <br /> - From the processing factliry to the customer. <br /> - Frota the customer to the processing facility, after its useful life. <br /> <br />