[en] The mineral-geochemical characteristics of Shuanghuajiang uranium deposit is introduced. At this area only secondary U minerals (without any primary U mineral) are found from the surface to the depth of 445m. The uranium isotope ratio ²³⁴U/²³⁸U, the content of ancient uranium and chemical compositions of various rocks have been studied. The results show that the uranium deposit belongs to an infiltration deposit. Uranium source of the uranium deposit is from Yanshanian granite and not from Indosinian granite. The uranium isotope ratio ²³⁴U/²³⁸U of Yanshanian granite is smaller than 1 (0.08 - 0.978), whereas that of Indosinian granite is greater than 1 (1.038 - 1.058). In addition, the Yanshanian cataclatic granite provides silicon and calcium for uranophane that is a mainly valuable mineral in the uranium deposit

[en] Black uranophane found in a leaching type uranium deposit that occurs in granite is described. Chemical analyses, x-ray data and other mineralogical data are given. Results of study show that the difference between black and yellow uranophane is that the former contains U⁴⁺, but the form of existence of U⁴⁺ in the mineral is not known

[en] Beijing Research Institute of Uranium Geology has carried out a research programme of deep underground disposal for high-level radioactive wastes sponsored by the China National Nuclear Corporation (CNNC) since 1985. Analogue studies have been focused on bentonite as a buffer material. Evaluation of a uranium ore body in granite as an analogue of a radioactive waste repository was commenced last year under the support of CNNC and IAEA

[en] Since the early 1980's, China has steadily developed technology and policy for LLW/ILW disposal and has proposed the regional disposal principle open-quotes establishing the regional disposal site and disposal of radwaste as near the origin as possibleclose quotes. The construction of the first radioactive waste disposal site in China was began in 1995. The site characterization of the Guangdong disposal site for LLW/ILW was completed in 1995. The site screening of the East China disposal site for LLW/ILW will be begun in this year

[en] This paper has briefly introduced the programme and content of the Conference on Scientific Bases for Nuclear Waste Management. It also has presented the research projects and the achieved progress in 'Aespoe' Underground Research Laboratory, Sweden. (author)

[en] The environmental monitoring elements and factors of Finland ONKALO URL were systematically analyzed, the contents of environmental impact assessment of Yucca Mountain high level radioactive waste disposal repository in USA were comprehensively summarized. The above contents were compared with the proposed URL in China, specific suggestions on related research and environmental impact assessment of subsequent high level radioactive waste repository in China were proposed. (authors)

[en] For disposal of low- and intermediate-level solid radioactive wastes, shallow-ground disposal can provide adequate isolation of waste from human for a fairly long period of time. The objective of disposal site selection is to ensure that the natural properties of the site together with the engineered barrier site shall provide adequate isolation of radionuclides from the human beings and environment, so the whole disposal system can keep the radiological impact within an acceptable level. Since the early 1980's, complying with the national standards and the expert's conception as well as the related IAEA Criteria, geological selection of disposal sites for low-and intermediate-level solid radwastes has been carried out in East China, South China, Northwest China and Southwest China separately. Finally, 5 candidate sites were recommended to the CNNC

[en] The environmental monitoring elements and factors of Finland ONKALO URL were systematically analyzed, the contents of environmental impact assessment of Yucca Mountain high level radioactive waste disposal repository in USA were comprehensively summarized. The above contents were compared with the proposed URL in China, specific suggestions on related research and environmental impact assessment of subsequent high level radioactive waste repository in China were proposed. (authors)

[en] With the purpose of selecting a disposal site for the low- and intermediate-level radwastes arising from Qinshan NPP, site investigations were carried out in several districts of Zhejiang Province. Investigation objectives included the circumstances of geology, hydrogeology, environmental ecology, and social economy. On the basis of collected data, five possible sites were recommended for policy-making reference and further investigation

[en] This paper presents research progress of uranium mineralogy in recent year. It concludes 4 following fields: the discovery of new uranium mineral species; the refinement of crystal structure study on uranium mineral; the further comprehensive laboratory study on uranium mineralogy; and the application of uranium mineralogy to nuclear environment science. (authors)