Safety_Series_041_1975 - gnssn - International Atomic Energy ...

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This publication is no longer valid Please see http://www.ns-iaea.org/standards/ 0 5 TABLE XIII. EXPOSURE PATHWAYS OF WINDSCALE IRISH SEA RADIOACTIVE WASTE DISCHARGES T y p ic a l exp osu re C r it ic a l m a te ria l E xposed p o p u la tio n grou p D a ily con su m p tion rate or annual hours o f exposu re E xposed organ R a d ion u clid es con trib u tin g t o exp osu re D e r iv e d w o r k in g lim it o f the p o p u la tio n grou p c o n c e r n e d P ercen ta g e o f ICRP d ose lim it (m r e m /a ) Porphyra (seaw eed ) L a verb rea d c o n 160 g la verb rea d GI tract 106Ru (c r it ic a l), 30 0 p C i /g 6 0 0 a 4 0 a sum ers in South (8 0 g seaw eed) (LLI) 144C e (106Ru + c r it i c a l grou p W a les 144C e ) in Estuarine silt Fish 2 . 6 x 104 persons (c r it ic a l grou p 100) F isherm en (10 persons) L o c a l fish erm en 350 h T o ta l b od y 95Z r , 55N b , 25 g GI tract 106Ru 106Ru the sea w eed 1 . 4 m r e m /h 50 10 90 0 p C i/g 2 0 . 1 APPENDIX III (10 0 persons) T o ta l bod y 13,C s 1 8 00 p C i/g 0 . 5 0 . 1 Fishin g g ear Fisherm en 500 h Hands I06Ru 15 m r e m /h 20 0 . 3 (10 0 persons) 144C e a T h ese v a lu es assum e that th ere w as n o d ilu tio n o f C u m berlan d sea w eed w ith in a c tiv e sea w eed fro m elsew h e r e ; du ring the p e rio d o f m a rk et sa m p lin g ( 1 9 6 2 -1 9 6 7 ), on w h ich th ese v a lu es are b a sed , th ere w as an a v era g e d ilu tio n fa c to r o f 4 . 2 .
This publication is no longer valid Please see http://www.ns-iaea.org/standards/ APPENDIX III 6 7 TABLE XIV. MICROCURIE-DOSE FACTORS FOR CALCULATING ENVIRONMENTAL DOSES Isotope U nits o f m rem /fiC i intake Units o f % M PRI/(JCi in take GI tra ct a T o ta l b o d ya Thyroid a B o n e'3 M axim um in divid ual z4Na 6 . 2 1 .7 . . 32 p 21 7 . 4 6 . 2 51Cr 1 .2 - - - 64Cu 4 . 6 - - - 65Zn 9 .6 6 . 5 0 .1 2 16As 77 - - - 131j - - 1700 Adult - 17 000 C hild 239Np 19 - - R E +Y C 50 - - - 24Na 6 . 2 T y p ic a l R ichland Resident 1.7 - - 32 p 21 7 . 4 - 19 51C r 1.2 - - - 64Cu 4 . 6 - - - 65Zn 9 .6 65 - 0 .3 7 76As 77 - - - 131 j - - 1700 Adult - 17 000 Child 239Np 19 - - R E +Y C 50 - - - a M icro cu rie-d o se fa cto r: T h e dose in m rem th at 1 juCi o f an ingested rad ionuclide w ill d eliv er to a given organ e ith er over an in fin ite period o f tim e from an acu te in ta k e , or over a o n e- y e a r period when equ ilib riu m con d itions are m ain tain ed by a constan t d aily in ta k e . A ll rad ionuclides w ere considered to be in soluble form for com p u tation o f dose fa cto rs. It is reco g n ized that the dose lim it for the to ta l body is based on exposure to the gonads and red bone m arrow . T h e dose facto rs used here for the to ta l body assume a uniform d istrib u tion, k In the case o f bone the fa cto r is'exp ressed in per c e n t o f m axim u m perm issible rate o f in ta k e , i . e . 100°/o is equ iv a len t to the M PRI. c Rare earths plus y ttriu m .
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