Individual Monitoring Services (IMS) for External and Internal Exposures

Transcription

1 Individual Monitoring Services (IMS) for External and Internal Exposures B. Morelli, C.M. Castellani, P. Battisti ENEA Radiation Protection Institute, Bologna (Italy) Contribution to the Italy in Japan 2011 initiative Science, Technology and Innovation

2 ENEA IRP Individual Monitoring Service The IMS is processing about 70,000 dosemeters per years: 6000 photon dosemeter; 1300 thermal neutron dosemeters; 1300 fast neutron dosemeters; 2000 extremity dosemeters for monitoring period of 45 days and 90 days for extremity dosemeters. The IMS provides dosemeters to about 200 external users: - 25% hospital, - 25% research institute, - 25% industry, - 5% decommissioning of the nuclear plants - 20% other mainly private laboratory. 2

3 ENEA IRP Individual Monitoring Service The IMS provides 5 kinds of dosemeters to assess Personal Dose Equivalent Hp(d) and Ambient Dose Equivalent H*(d) as required by Italian Legislation (D. Lgs. 241/2000). Photon dosemeter Thermal Neutron Dosemeter Fast neutron dosemeter - whole body TL dosemeter for photons, based on 2 detectors of LiF(Mg,Cu,P) (GR200); - whole body TL dosemeter for thermal neutrons and gamma based on 2 detectors of LiF(Mg,Cu,P) (GR200) and 7 LiF(Mg,Cu,P) (GR207); - whole body SSNDT (CR-39 ) dosemeter for fast neutrons; 3

4 ENEA IRP Individual Monitoring Service Extremity dosemeters GR200 MCP-Ns - extremity TL dosemeter for X, and high energy with one detector of LiF(Mg,Cu,P) GR200 - extremity TL dosemeter for X, and mean energy with one thin detector of LiF(Mg,Cu,P) MCP-Ns both available with ring or bracelet supports suitable for sterilization 4

5 ENEA IRP Individual Monitoring Service Intercomparisons 5

6 ENEA IRP Individual monitoring Service The internal dosimetry (Laboratories for in vivo measuremens) Casaccia: High Energy whole body counter - Low energy organ counter; Saluggia: High Energy whole body counter; Bologna: High Energy whole body counter - transportable Thyroid counter Trisaia High Energy whole body counter Monitoring measurements performed per year: about 1000 (35% for ENEA workers). The Internal dosimetry (Laboratory for in vitro measurements) The unit is organized as a unique laboratory split into three separate, intercalibrated sublabs, Casaccia,Saluggia and Trisaia, all of them equipped by alpha spectrometry, scintillation counting, gamma spectrometry, alpha and beta counting (ICP mass spectrometry only in Casaccia) Main analyses provided: Actinides, Uranium isotopes, 226 Ra, 210 Po, 90 Sr, 14 C, 3 H, gamma emitters. Monitoring analysis performed per year: over 2000 (30% for ENEA workers). The lab regularly participates to PROCORAD Intercomparisons since

7 Technical Services Internal exposure (Casaccia, Bologna, Saluggia and Trisaia): in vivo measurement systems Casaccia: whole body counter Trisaia: whole body counter Bologna: whole body counter Casaccia: lung (organ) counter Saluggia: whole body counter Bologna: thyroid counter 7

8 Calibration phantoms for in vivo counting L.L. THORSO PHANTOM BOMAB PHANTOM Am-241, Uranio, Pu-239 ANSI THYROID PHANTOM Am-241, Uranio, Pu BOMAB (Ref. Man) Cs-137, K-40 e altri Lung counting calibration by L.L. THORSO PHANTOM L.L. THORSO PHANTOM: additional chest plates Home Made SKULL SKULL PHANTOM PHANTOM - Am-241 (24 point sources of Am-241) 8

9 Technical Services Internal exposure (Casaccia, Saluggia and Trisaia): bioassay measurements laboratories 9

10 Technical Services Internal exposure (Casaccia, Saluggia and Trisaia): bioassay measurements laboratories 10

11 ENEA IRP Individual Monitoring Service References Fantuzzi E., Monteventi F., Sermenghi I., Uleri G.C., The implementation in routine of the ENEA new personal Photon Dosemeter. Radiat. Prot. Dosim. 120 (1-4), p (2006). F. Mariotti. G. Uleri and E. Fantuzzi. Batch homogeneity of LiF(Mg, Cu, P)-GR200 and LiF(Mg, Cu, P)-MCP-Ns TL detectors for use as extremity dosemeters at ENEA personal dosimetry service. Radiat. Prot. Dosim. 120 (1-4), (2006). Morelli, B., Mariotti, F., Fantuzzi, E. The ENEA neutron personal dosimetry service. - Radiat. Prot. Dosim. 120 (1-4), p (2006). Mariotti, F., Fantuzzi E., Morelli, B., Gualdrini G., Botta M.C., Uleri G., Bordy J.M. and Denoziere M. ENEA extremity dosimeter based on LiF(Mg,Cu,P) to Evaluate Hp(3,a). Radiat. Prot. Dosim. 144 (1-4), p (2011). 11

12 ENEA IRP Individual Monitoring Service References G. Tarroni, G. M. Castellani, C. Melandri, P. Battisti Evaluation of 137 Cs internal contamination in children by means of whole body counter measurements. Radiation Protection Dosimetry, Vol 41, N. 2/4 (1992) C. Ceccarelli, P. Battisti et al. Radiation dose to testes after 131 I therapy for ablation of postsurgical thyroid remnants in patients with differentiated thyroid cancer The Journal of Nuclear Medicine, Vol. 40, N. 10 (1999) G. Gualdrini, P. Battisti, R. Biagini, P. De Felice, A. Fazio, P. Ferrari Development and Characterisation of a head calibration phantom for in vivo measurement of actinides Applied Radiation and Isotopes, Vol 53, N. 1-2 (2000) D. Arginelli, M. Montalto, S. Bortoluzzi, M. Nocente, M. Bonardi, F. Groppi Radioanalytical determination of americium in human urines by extraction chromatography and high resolution alpha-spectrometry Journal of Radioanalytical and Nuclear Chemistry, Vol. 263, No. 2 (2005) Giardina, L. Andreocci, S. Bazzarri, L. Mancini, P. Battisti A comparison of different radiochemical methods applicable for the determination of plutonium isotopes in urine via alpha spectrometry Czechoslovak Journal of Physics, Vol. 56 (2006) Japan 12

13 ENEA IRP Individual Monitoring Services Adresses : Reference for Personal external dosimetry service : Dr. Bruna Morelli - Reference for Integrated laboratory for internal contamination monitoring: Dr. Paolo Battisti - paolo.battisti@enea.it 13