00375nas a2200121   4500000000100000000000100001008004100002100001800043700001900061700001500080700002000095245013800115       2022                            d1 aMichael Ansah1 aBoris Stepanov1 aPaul Amoah1 aEphraim Agyekum00aEffective physical protection system design and implementation at a radiological facility: an integrated and risk management approach