VI. CONCLUSIONES.

• Se realizó un ensayo piloto inicial donde verificó la magnitud del problema a resolver, el cual permitió corroborar que los monitores de contaminación superficial del país se usan sin estar calibrados o verificados por un laboratorio competente que certifique su estado metrológico.

• Por primera vez en Cuba se desarrolló e implementó una metodología para la calibración de monitores de contaminación superficial. La metodología elaborada está en concordancia con las nomas existentes internacionalmente:
• ISO/WD 7503-3: Evaluation of surface contamination – Part 1: Direct Metod.2006
• ISO 7503-3: Evaluation of surface contamination – Part 1: Beta-emiters

      (maximum beta energy greater than 0.15 Mev).1996.

• ISO 7503-3: Evaluation of surface contamination – Part 3: Isomeric transition and electron capture emitters, low energy beta-emitters (Emax   0.15 Mev).1996.
• ISO 8769 Reference sources for the calibration of surface contamination monitors – Beta emitters (maximum beta energy less than 0.15 Mev) and alpha-emitters, 1988.
• ISO 8769 Reference sources for the calibration of surface contamination monitors – Beta emitters (maximum beta energy less than 0.15 Mev and photons of energy less than 1.5 Mev), 1996.

• Se implementó la metodología en el Laboratorio Secundario de Calibración Dosimétrica (LSCD) del Centro de Protección e Higiene de las Radiaciones (CPHR) a través de un servicio nacional para la calibración de monitores de contaminación superficial. Se garantiza así el aseguramiento metrológico de las medidas de contaminación superficial en las prácticas con uso de fuentes no selladas en Cuba.

VI. RECOMENDACIONES

• Elaborar una Norma Cubana para la verificación de monitores de contaminación superficial.
• Determinar un factor de corrección para optimizar el método de las posiciones sucesivas.

II. REFERENCIAS BIBLIOGRÁFICAS

• Adrian M.H. van der Veen, Jean Pauwels ISO/REMCO TG 5, Sampling N 27 Uncertainty calculations in the certification of reference materials. Principles of analysis of variante. May 2000.
• Bauer,Tim. Calibration for Scaninning and Direct Measurement of Surface Activity. En: 14th Annual Meeting Council on Ionizing Radiation Measurents and Standards. Gathersburg, MD, Octubre 2005.

3. BIPM, IEC, IFCC, ISO, IUPAC, IUPAP, OIML (1993) “Guide to the expression of uncertainty in measurement”, first edition, ISO Geneva, 1993

•  BIPM, IEC, IFCC, ISO, IUPAC, IUPAP, OIML (1993) “Guide to the expression of uncertainty in measurement”, first edition, ISO Geneva, 1993
• Calibration of Radiation Protection Monitoring Instruments. Technical Report Series (on preparation).IAEA, Vienna, July 1996.
• Colección Seguridad No. 115   “Normas básicas internacionales de seguridad para la radiación ionizante y para la seguridad de las fuentes de radiación”.  Organismo Internacional de Energía Atómica, Viena, 1997.
• Cooper, Sarenee. A Method for Establishing e-Trazability to NIST High-Dose
• Measurement Standards, NIST, En: 14th Annual Meeting Council on Ionizing Radiation Measurents and Standards. Gathersburg, MD, Octubre 2005.
• Colectivo de autores. Programa del curso superior de protección radiological. La Habana ,1998.
• Colectivo de autores. Protección radiological en la aplicación de las teorías nucleares. La Habana, Ed. Cubaenergía, 2002.
• Dan, Sisk y Johnson, Michelle. Empirically Derived Minimum Detectable Count Rates for Contaminations Surveys, PNNL. En: 14th Annual Meeting Council on Ionizing Radiation Measurents and Standards. Gathersburg, MD, Octubre 2005.

12.  Delacroix, D., Guerre, J. P. and Leblanc, P. Radionuclides and Radioprotection. (French Atomic Energy Commission), (June 1994).

• Eisele, Shawna y Olsher, Dick. Evaluation of Alpha and Beta Surface Contamination using Portable Contamination Using Portable Contamination Monitors, En: 14th Annual Meeting Council on Ionizing Radiation Measurents and Standards. Gathersburg, MD, Octubre 2005.
•  Guide to expresión of uncertaity in measurement. Switzerland, International Organization for Standardization, 1995.

15. Henson, P. W. Radiation Dose to the Skin in Contact with Unshielded Syringes Containing Radioactive Substances. Br. J.Radiol. 46, 972–977 (1973).

16. IAEA. International Basic Safety Standards for Protection against Ionising Radiation and for the Safety of Radiation Sources. Safety Series No. 115, (Vienna: IAEA) (1996).
17. IAEA. Regulations for the Safe Transport of Radioactive Material. 1996 Edition. Safety Standards Series No.ST1/Requirements (Vienna: IAEA) (1996).
18. ICRP. Dose Coefficients for Intakes of Radionuclides by Workers. Publication 68 (Oxford: Pergamon) (1994).
19. ICRP. Data for Use in Radioprotection against External Radiation. Publication 51 (Oxford: Pergamon) (1987).
20. ICRP. Individual Monitoring for Internal Exposure of Workers, Replacement of ICRP Publication 54. Publication 78 (Oxford: Pergamon) (1997).
21. ICRP. Limits for Intakes of Radionuclides by Workers. Publication 30  (Oxford: Pergamon) (1979–1988). (Parte 1–4 y el suplemento)
22. ICRP. 1990 Recommendations of the International Commission on Radiological Protection. Publication 60, (Oxford:
23. International Organization for Standardization “ISO Guide 35:1989 - Certification of reference materials - General and statistical principles”, second edition, ISO Geneva, 1989.

• International Organization for Standardization, “ISO 5725-1:1994 Accuracy (trueness and precision) of measurement methods and results - Part 1: General principles and definition”, Statistical methods for quality control Vol. 2 (1994), pág. 9-29
• International Organization for Standardization, “ISO 5725-3:1994 Accuracy (trueness and precision) of measurement methods and results - Part 3: Intermediate measures of the precision of a standard measurement method”, Statistical methods for quality control, pág. 75-104

26. ISO internacional Vocabulary of Basic and general terms metrology. 1993.

• ISO/REMCO TG 5, Sampling N 28 Uncertainty calculations in the certification of referente materials. 2. Homogeneity study, May 2000
• ISO/WD 7503-3: Evaluation of surface contamination – Part 1: Direct Metod.2006
• ISO/WD 7503-3: Evaluation of surface contamination – Part 2: Indirect Metod.2006
• ISO 7503-3: Evaluation of surface contamination – Part 1: Beta-emiters (maximum beta energy greater than 0.15 Mev).1996.
• ISO 7503-3: Evaluation of surface contamination – Part 3: Isomeric transition and electron capture emitters, low energy beta-emitters (Emax   0.15 Mev).1996.
• ISO 8769 Reference sources for the calibration of surface contamination monitors – Beta emitters (maximum beta energy less than 0.15 Mev) and alpha-emitters, 1988.
• ISO 8769 Reference sources for the calibration of surface contamination monitors – Beta emitters (maximum beta energy less than 0.15 Mev and photons of energy less than 1.5 Mev), 1996.

34. Kocher, D. C. and Eckerman, K. F. Electron Dose Rate Conversion Factors for External Exposure of the Skin from Uniformly Deposited Activity on the Body Surface. Health Phys. 53(2) 135–141 (1987).
35. Lagoutine, F., Coursol, N. and Legrand, J. Tables des Radionucle´ides. CEA-ORIS, 4 vol, (1983–1987).

• Law A.M., Kelton W.D., “Simulation modeling and analysis”, 2nd edition, McGraw Hill, New York 1991, chapter 6
• Mattos O Ramos, Mantel Controle de qualidade das fontes de contaminação.2004.
• Mike Unterweger NIST Activities in sources for Area Monitoring, En: 14th Annual Meeting Council on Ionizing Radiation Measurents and Standards. Gathersburg, MD, Octubre 2005.

39. Monitoring for Intakes of Radionuclides by Workers: Design and Interpretation. Publication 78 (Oxford: Pergamon) (1998).
40. Moreau, A. La Radioprotection dans les Laboratoires de Faible et Moyenne Radioactivite´. CEA-Saclay. Report SPR/SRI, 1981.
41. Murray R. Spiegel. Teoría y problema de estadística. La Habana, Instituto cubano del libro, 1975.
42. Pauwels J., Kurfürst U., Grobecker K.H., Quevauviller Ph., “Microhomogeneity study of BCR candidate reference material CRM-422 - cod muscle”, Fresenius J. Anal. Chem. 345 (1993), pág. 478-481
43. Pauwels J., Lamberty A., Schimmel H. “Homogeneity testing of reference materials”, Accreditation and Quality Assurance 3 (1998), pág. 51-55
44. Perotin, J. P. y Goubert, J. Evaluation des Risques d’Irradiation des Mains dans un Laboratoire de Controˆle Radiopharmaceutique.D. CEA-Saclay. Report SPR/SRI (1979).
45. RadDecay Version 1.13. Grove Enginering (Rockville, Maryland, USA) (1996).

• Resolución Conjunta CITMA – MINSAP “Normas Básicas de Seguridad Radiológica”  NBSR)
• Safety Reports Series No. 16”Calibration of Radiation Protection MonitoringInstrumens”.  International Atomic Energy Agency Vienna, 2000.
• Scott Clare, Burgess Peter, Woods Mike  “The examination, Testing & Calibration of Portable Radiation Protection Instruments” en Masurement Good Practice Guide No.14.    National Physical Laboratory, March 1999.

49. Schiller S.B., “Statistical aspects of the certification of chemical batch SRMs”, NIST Special Publication 260-125, Gaithersburg, 1996
50. Schmidt, W., Nowotny, R., Kletter, P. and Frisschauf, H. Radiation Exposure due to 99mTc and 131I Manipulated in Syringes.J. Nucl. Med. 4, 389–391 (1979).

• Schuler, Ch y Werli, C. Evaluation of surface contamination – Proporsal for revision of ISO standard 7503, En: 14th Annual Meeting Council on Ionizing Radiation Measurents and Standards. Gathersburg, MD, Octubre 2005.
• Snedecor G.W., Cochran W.G., “Statistical methods”, 8th edition, Iowa State University press, Iowa USA, 1989, chapter 13

53. Takaku, Y. and Kida, T. Radiation Dose to the Skin and Bone of Fingers from Handling Radioisotopes in a Syringe. Health Phys 22, 295–297 (1971).

• Van Dalsem, Daniel. Planar Calibration Standards: Manufacture, Calibration and Trazability., En: 14th Annual Meeting Council on Ionizing Radiation Measurents and Standards. Gathersburg, MD, Octubre 2005.

55. Veen A.M.H. van der, Pauwels J., “Uncertainty calculations in the certification of referente materials. 1. Principles of analysis of variance”.2004
56. Veen A.M.H. van der, Alink A., “A practitioner’s approach to the assessment of the quality of sampling, sample preparation, and sub sampling”, Accreditation and Quality Assurance 3 (1998), pág. 20-26
57. Vigilancia radiológica de los puestos de trabajo y evaluación de la contaminación superficial. La Habana, s.e, 2007.