[en] Radiological characterisation of radioactive waste makes possible to identify and to quantify its composition on radioactive nuclides. Acceptance criteria are verified by radiological characterisation and also radiological characterisation is used for a more realistic evaluation of the radiological impact. Some important radioactive nuclide are not easily quantified, so that the development of specific procedures is required. This paper shows the work carried out by Ciemat on radiological characterisation of low and intermediate level waste. Developed procedures include both destructive and non destructive techniques than have been transferred to Enresa and have been evaluated satisfactorily by round robin tests at international level. (Author)

[en] Throughfall and stem flow volume generation was measured over 1 year period in a Pinus pinaster stand 9 years old. Throughfall was measured using 8 collectors in a fixed position connected to a tipping bucket rainfall gauge in a representative 10 x 10 m plot of the forest and stem flow was measured in three trees using a rubber ring around the trunk connected to a tipping bucket rainfall gauge. The two tipping bucket rainfall gauges was connected to a data logger programmed to record data every 5 minutes. (Author) 4 refs.

[en] Radiochemical purification and separation of radium has been carried out and the determination of total radium solubilized in aqueous samples has been studied assuming that all the alpha emitters of the sample have their origin in the 226Ra and elements of its desintegration chain. Also, the activities of 22Ra and 226 Ra have been evaluated separately doing a measurement after the chemical separation of the radium and another one 10 days after. (Author) 9 refs

[en] This report includes the work developed at CIEMAT during the fourth semestral period of the Partnew project ^New solvent extraction processes for minor actinides, during he first semestral period (september 2000 to february 2001). CIEMAT is involved in the following task : the study of the actinides (AN) and lanthanides (LN) extracting properties of new compounds with chemical structure based on two malonamide groups linked to an aromatic platform. The study of new s-bearing extractants with chemical structure similar to malonamides aforementioned, changing the 0 atoms by s atoms, and the determination of the selectivity of these new thiomalonamides of AN(III)extraction

[en] This report describes the results assessment of the intercomparison exercise among environmental radioactivity laboratories, organised by Spanish Regulatory Institution (CSN) and prepared and evaluated by UAB and CIEMAT respectively. The exercise has been carried out following the international standards ISO-43 and ISO/IUPAC that provide a useful guide to perform proficiency tests and inter-laboratories comparisons. The selected matrix for this year (2010) was a diet ash obtained from the ashing of a whole fresh diet (breakfast, lunch and dinner), that was enriched with artificial radionuclides (Cs-137, Co-60,Fe-55,Ni-63,Sr-90,Am-241,Pu-238,Pu-239,240 y C-14) and contained natural radionuclides (U-234, U-238, U-natural Th-230, Th-234, Ra-226, Ra-228, Pb-210, Pb-212, Pb-214, Bi-214, Ac-228, Tl-208, K-40) at environmental level of activity concentration. The z-score test was applied to determine how much the laboratories differ from the reference value. The reference value for this exercise was the median of the results from the different laboratories and their standard deviations to achieve a more complete and objective study of the laboratories performance. The participant laboratories have demonstrated a satisfactory quality level for measuring the natural and artificial radionuclides content in this matrix. The reference values obtained through the medians show a negative bias for Pb-210 and Th-234 when comparing to the given values of external qualified laboratories from ENEA and IRSN and positive one for K-40. (Author)

[en] This report includes the work developed at CIEMAT during the first annual period (September to August 2001) of the partner project: ''New solvent extraction processes for minor actinides

[en] The radiological quality of drinking water in Spain is regulated by Nuclear Security Guideline No, 7.7 (Rev.1) of the Nuclear Security Council (NSC). this guideline establishes the protocol to follow when the radiological level exceeds 0,1 Bq.l''1. When this level is passed, the responsible alpha emitter must be identified; ''210 Po, ''226Ra, ''230Th, ''239Pu, ''224Ra, ''234 U and ''138 U. Activity due to these isotopes is usually determined using alpha spectrometry with semiconductor detectors. This method allows the activity of the alpha emitters to be determined with a good sensitivity. however, it requires long radiochemical isolations and long counting times, so the method is not suitable for rough estimate radiological analysis. In this preliminary work, we present the conditioning of the sample-precipitate that is essential for further radiochemical isolations. (Author) 9 refs

[en] This report includes the work developed at CIEMAT into the part new project: '' New solvent extraction processes for minor actinides' during the first semestral period (September 2000 to February 2001). CIEMAT is lanthanides (LN) extracting properties of new compounds with chemical structure based on two malonamide groups linked to an aromatic platform. The study of new-bearing extractants with chemical structure similar to malonamide aforementioned, changing the 0 atoms by S atoms, and the determination of the selectivity of these new thiomalonamides for AN(III) extraction. (Author)

[en] With this tool the first intervention units staff will have knowledge of each of the agencies (more than 1500), the risks associated with each of them, those directly involved and the surrounding, and may carry out the first actions for the control of the situation and minimization of the consequences facing a possible accident.

[en] Radionuclides are largely used as tools for studying and quantifying soil erosion. The global fallout of artificial radionuclides derived from weapons testing (1945-1970) was rapidly and firmly fixed in soil surface horizons. This allowed determining soil erosion by comparing 137^Cs inventories at individual sampling points with a reference inventory. This procedure is complemented with the 210^Pbuns inventory calculation as an indicator of the local average of radionuclides deposition. Spectro radiometry is implemented to associate soil reflectance measurements to physical and chemical soil properties related to soil erosion processes obtained from laboratory analyses. The methodology applies both instrumental techniques in soil samples from a semiarid agricultural area near to Camarena (Toledo). The resulting inventories obtained for 137^Cs and 210^Pbexc are similar to the Spanish reference allowing comparation. Spectro radiometry results correlate well with soil properties measured in the laboratory and can be applied to determine these properties more quickly and easily, as well as for integration with gamma spectrometry results. This is a preliminary study to identify soils affected by erosion that is presented as a Master thesis of the Official Master Degree: ^Agro- Environmental Technology for a Sustainable Agriculture^, of the Technical University of Madrid - School of Agricultural Engineers (UPM-ETSI). Coherent and complimentary results are obtained applying both instrumental techniques within this agricultural area.. (Author)