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This publication is no longer valid Please see http://www.ns-iaea.org/standards/ 62 APPENDIX III TABLE XI. EXPOSURE FACTORS INVOLVED IN THE DISCHARGE OF AQUEOUS RADIOACTIVE WASTES S ite C r it ic a l m a te r ia l C r it ic a l e x p osu re c a te g o r y E xp osed grou p U n ited K in g d o m A t o m ic E n ergy A u th ority W in d s ca le Porphyra (la v e r b r e a d ) S ilt B eta d o se to GI tra ct G a m m a d ose to w h o le b o d y G e n e r a l p u b lic (Sou th W a les) F ish erm en W in frith Lob ster and c r a b flesh B eta d ose to GI tra ct L o c a l fish e rm e n an d f a m ilie s S p rin g field s S ilt G a m m a d ose to. w h o le b o d y D red g e rm en A ld e rm a sto n D rin k in g w a ter B e ta -g a m m a d ose to w h o le b o d y (s o m a tic and g e n e t ic h azard ) G e n e r a l p u b lic (G rea ter L on d on ) H a rw ell D rin k in g w a ter B e ta -g a m m a d ose to w h o le b o d y (so m a tic and g e n e t ic h a z a rd ) G e n e ra l p u b lic (G rea ter L on d on ) A m ersh a m D rin k in g w a ter B e ta -g a m m a d ose to w h o le b o d y (s o m a tic and g e n e t ic h azard ) G e n e r a l p u b lic (G rea ter L on d on ) D ou n rea y D etritu s B eta d o se to hands L o c a l fish erm en B each slu dge G a m m a d ose to w h o le b o d y L o c a l fish erm en an d oth ers C h a p e lc ro ss S h rim p flesh B e ta -g a m m a d ose to w h o le b o d y L o c a l fish e rm e n and fa m ilie s Sand and silt G a m m a d ose to w h o le b o d y S a lm o n fish erm en C e n tra l E le c t r ic ity G e n e ra tin g Board and Sou th o f S c o tla n d E le c t r ic ity Board B e rk eley S ilt G a m m a d o se to w h o le b o d y S a lm o n fis h e r m e n /R iv e r A u th ority w orkers Shrim p and sa lm o n flesh B e ta -g a m m a d ose to w h o le b o d y L o c a l fish e rm e n and f a m ilie s B ra d w ell O y ster flesh B eta d ose to GI tr a c t O yster fish e rm e n and fa m ilie s H in k le y P oin t Fish and sh rim p flesh B e ta -g a m m a d ose to w h o le b o d y L o c a l fish e rm e n and f a m ilie s S ilt G a m m a d ose to w h o le b o d y L o c a l fish erm en D u n gen ess Fish flesh B e ta -g a m m a d ose to w h o le b o d y L o c a l fish e rm e n and f a m ilie s S ilt G a m m a d o se to w h o le b o d y B ait d ig g e r s O ld b u ry S ilt G a m m a d ose to w h o le b o d y S a lm on fis h e r m e n /R iv e r A u th ority w orkers Sh rim p and sa lm o n fle sh B e ta -g a m m a d ose to w h o le b o d y L o c a l fish e rm e n and f a m ilie s S iz e w e ll Fish and s h e llfish flesh B e ta -g a m m a d ose to w h o le b o d y L o c a l fish e rm e n and fa m ilie s Sand G a m m a d ose to w h o le b o d y L o c a l fish erm en T raw sfyn yd d T rou t flesh B e ta -g a m m a d ose to w h o le b o d y L o c a l fish e rm e n an d fa m ilie s W y lfa Fish and sh ellfish fle sh B e ta -g a m m a d ose to w h o le b o d y L o c a l fish e rm e n an d fa m ilie s S ilt G a m m a d ose to w h o le b o d y L o c a l fish erm en H unters ton Fish flesh B e ta -g a m m a d ose to w h o le b o d y L o c a l fish e rm e n an d fa m ilie s Sand G a m m a d o se to w h o le b o d y S h ellfis h c o lle c t o r s
This publication is no longer valid Please see http://www.ns-iaea.org/standards/ APPENDIX III 63 T A B L E XI ( c o a t . ) S ite C r it ic a l m a te r ia l C r it ic a l e x p osu re c a te g o r y E xp osed g rou p M in istry o f D e f e n c e (N a v y D e p a rtm e n t) C h a th a m R iver m u d /s ilt G a m m a d ose to w h o le b o d y G e n e r a l p u b lic (h o u seb o a t d w e lle rs) F a sla ne M u d /s ilt G a m m a d ose to w h o le b o d y B oatyard w orkers R osyth S ilt G a m m a d o se to w h o le b o d y D r e d g e rm e n Liquid discharges from Dounreay contaminate a variety of potential seafoods to a small fraction of the DWL, but the authorization is largely based upon the activity that collects upon salmon fisherm en's nets and the resultant dose to the hands of the fishermen handling these nets. During 1969 very little fishing was carried out, but monitoring of experimental nets in 1968 showed the average dose to the hands of fewer than ten fishermen during the 1968 fishing season to be about 70 mrem compared with a dose lim it of 3750 mrem allocated to the fishing season. The critical group with respect to gaseous discharges is often infants who drink cow s' milk and measurements of activity in milk near Windscale indicate doses in 1969 not exceeding 30 mrem to mineral bone due to 90Sr and 3 m rem to whole body due to 137Cs, including the contribution due to fall-out. The critical group for krypton releases from the reprocessing plant at Windscale com prises the few mem bers of the population who live within about 1 km of the plant. A conservative calculation shows the upper limit of exposure of this critical population due to the 1970 UK power programme to be 4 m rem /a (skindose), and of a larger population of a few thousand within about 6 km to be 1-2 m rem /a (skin dose). Dose rates to gonads are about 1% of these values. Doses to m em bers of the general public due to burial of solid waste at Drigg and Ulnes Walton are negligible because the substratum is of clay and any water draining from the site runs into non-potable water courses. The amounts of waste disposed of into the Atlantic Deeps are too small to have an appreciable effect on the environment. The average dose rate due to 1®6Ru in the GI tract of the whole group of 26 000 laverbread eaters, whose consumption was about 1 0% of that of the critical group, was about 60 m rem /a during 1962-1967,
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