Objective: revision, analysis, and significant improvement of quality of the database of WBC measurements made in1986-2014 at radioactively contaminated territories of Ukraine by the use of renewal of informational gaps andimprovement of the model for assessment of internal exposure doses.
Materials and methods: Inthe periodfrom 1986 to 2014 experts of the Whole Body Counters Laboratory of NRCRMaccumulated about 1.5 million results of WBC measurementsof radio-cesium incorporated in the body of personsresiding at the territories which are radioactively contaminated due to Chornobyl accident. Most of measurements(~64 %) were made during the first 15 years after the accident. The most of measurements were made in Kyiv (~23 %),Zhytomyr (~36 %), Rivne (~20 %) and Chernihiv (~5 %) Oblasts. Works on revision of database of WBC measurementsincluded: transformation of data saved in paper format into electronic form, checking for correctness and correspon-dence of information, renewal of lacking information at the fields of database, improvement of the model for eval-uation of internal exposure doses by the data of WBC measurements. In the model for evaluation of revised doses,it is assumed uniform content of radio-cesium during a year. Reference values are used of metabolism parametersand anthropometric human parameters recommended in publications of ICRP.
Results: Revised doses have been reconstructed for 1,386,585 records of data base of WBC measurements that fitspecially elaborated criterions for estimation of quality of results. Among them 604,215 records are WBC measure-ments of children and adolescents younger than 18, and 782,370 records correspond to adult inhabitants of Ukraine,most of which reside in Zhytomyr, Kyiv, Rivne and Chenihiv Oblasts.
Conclusions: Obtained results serve as a ground for further works on improvement of models for evaluation of pass-port doses and individualized exposure doses of subjects registered in Ukrainian State Register - of persons thataffected due to Chornobyl accident. Evaluated doses can be used for epidemiological, clinical and other research.
Meta doslidzhennia: reviziia, analiz i suttieve polipshennia iakosti bazy danykh LVL-vymiriuvan', provedenykh u1986–2014 rr. na radioaktyvno zabrudnenykh terytoriiakh Ukraïny za rakhunok vidnovlennia informatsiĭnykh proga-lyn ta vdoskonalennia modeli rozrakhunku doz vnutrishn'ogo oprominennia.Materialy ta metody doslidzhennia. U period z 1986 po 2014 rr. fakhivtsiamy laboratoriï lichyl'nykiv vyprominiu-vannia liudyny NNTsRM nakopycheno blyz'ko 1,5 mln rezul'tativ LVL-vymiriuvan' vmistu inkorporovanogoradiotseziiu v organizmi osib, iaki prozhyvaiut' na radioaktyvno zabrudnenykh vnaslidok avariï na ChAES terytoriiakh.Bil'shist' vymiriuvan' (64 %) bulo zdiĭsneno u pershi 15 rokiv pislia avariï. Perevazhna chastyna vymiriuvan' bu-la zroblena v Kyïvs'kiĭ (~ 23 %), Zhytomyrs'kiĭ (36 %), Rivnens'kiĭ (20 %) ta Chernigivs'kiĭ (5 %) oblastiakh. Ro-boty z reviziï bazy danykh LVL-vymiriuvan' vkliuchaly: perenesennia danykh, iaki zberigaiut'sia na paperovykh nosiiakhu elektronnu formu; perevirku korektnosti ta vidpovidnosti informatsiï; vidnovlennia vidsutn'oï informatsiï upoliakh bazy danykh; vdoskonalennia modeli rozrakhunku doz vnutrishn'ogo oprominennia za danymy LVL-vymiriu-van'. U modeli rozrakhunku revizovanykh doz prypuskaiet'sia rivnovazhnyĭ vmist radiotseziiu vprodovzh roku. Vyko-rystovuiut'sia referentni znachennia parametriv metabolizmu ta antropometrychni parametry liudyny, rekomendo-vani v publikatsiiakh MKRZ.Rezul'taty. Revizovani dozy rekonstruĭovano dlia 1 386 585 zapysiv bazy danykh LVL-vymiriuvan', iaki zadovol'-niaiut' spetsial'no rozroblenym kryteriiam otsinky iakosti rezul'tativ LVL-vymiriuvan'. Sered nykh 604 215 za-pysiv – tse LVL-vymiriuvannia u diteĭ i pidlitkiv, molodshykh 18 rokiv, a 782 370 zapysiv – doroslykh meshkantsiv Uk-raïny, bil'shist' z iakykh prozhyvaie u Zhytomyrs'kiĭ, Kyïvs'kiĭ, Rivnens'kiĭ ta Chernigivs'kiĭ oblastiakh.Vysnovky. Otrymani rezul'taty ie pidґruntiam dlia podal'shykh robit z udoskonalennia modeleĭ rozrakhunku paspo-rtnykh doz ta indyvidualizovanykh doz oprominennia sub’iektiv, zareiestrovanykh u Derzhavnomu reiestri Ukraïny osib,iaki postrazhdaly vnaslidok Chornobyl's'koï katastrofy. Rozrakhovani dozy mozhut' buty vykorystani dliaepidemiologichnykh, klinichnykh ta inshykh doslidzhen'.
Keywords: Chornobyl accident; WBC measurements; database; internal exposure; radio-cesium; reconstruction of exposure doses; whole body counter.
V. V. Vasylenko, S. V. Masiuk, О. М. Ivanova, V. O. Pikta, Z. N. Boiko, М. І. Chepurny, V. B. Buderatska, G. M. Zadorozhna, L. O. Lytvynets, M. S. Kramarenko, G. V. Fedosenko, A. G. Kukush, M. S. Kuriata, N. S. Zhadan, T. F. Babenko.