Qaidam basin，located at the northeastern margin of the Qinghai-Tibet Plateau，is one of China’s major large-scale oil- and gas-bearing basins. The results of uranium exploration in recent years show that it has good prospects of uranium mineralization. However，compared to the western Qaidam basin，research on the fundamental geology and uranium exploration in the eastern Qaidam basin remains relatively underdeveloped. Based on systematic summary of low-temperature thermochronological data，provenance and growth strata characteristics，the Cenozoic tectonic evolution history of the east Qaidam area was reviewed. We investigated the control of Cenozoic structural evolution on uranium mineralization in the eastern Qaidam，through comprehensive analysis of typical uranium occurrences surface (field observations) and near-surface (seismic profiles) data. The results indicated that fault systems exert primary control over uranium mineralization，with uranium occurrences predominantly distributed within the flank of gentle anticlinal near the thrust faults，and the Olongbulak North Fault and its secondary faults may work as the principal ore-controlling faults. The uranium mineralization in the east Qaidam occurs predominantly by exudative uranium metallogeny，with Carboniferous hydrocarbon source rocks potentially serving as significant provider of abundant uranium for the mineralization processes. The fault systems within the basin provide effective channels and driving force for the upward migration of deep uranium-rich reduction fluid，and the regional intense compression and hydrocarbon generation control the spatial position of uranium mineralization. The findings in this paper are meaningful for the following uranium exploration work in the east Qaidam basin.

Xiangshan ore field is the largest volcanic-hosted uranium ore field in China. Continuous discoveries of lead，zinc，silver，and copper polymetallic mineralization at depth beneath uranium mineralization reveal a spatial distribution pattern of “upper uranium-lower polymetallic”mineralization. Therefore，the genetic relationship between polymetallic mineralization and large-scale uranium mineralization has become another research focus in the Xiangshan ore field. This study systematically investigated the H-O-S-Pb isotopic compositions and conducted comprehensive comparative analyses of uranium and polymetallic mineralization. Results indicate that uranium mineralization involved more atmospheric precipitation and crustal-derived materials compared to polymetallic mineralization. The sulfur isotopic composition of polymetallic mineralization in the Xiangshan area shows distinct differences from typical regional polymetallic deposits. At least one stage of relatively uranium-enriched mineralization process has been identified during the polymetallic mineralization in Xiangshan region.

In the Xiaguxuan area of the eastern QF_Ⅴ ore belt in the Lujing uranium ore-field，siliceous vein type uranium mineralization occurs. The ore-bearing rock is medium-coarse-grained porphyritic biotite granite. The hydrothermal alteration near the ore mainly includes hematitization，silicification，chloritization and carbonatization. Zircon U-Pb chronology，petrography and petrogeochemical analysis show that the zircon U-Pb concordant age of the uranium-bearing fresh granite is 228.3 Ma and the weighted average age is 228.9 Ma，which was formed in the second stage of the Indosinian period (Late Triassic). The major elements are characterized by high potassium calc-alkaline series and weakly peraluminous granite，with high contents of silicon and titanium，low contents of magnesium and iron，slightly low aluminum，rich in alkalis and potassium and low in sodium. Among the trace elements，Ba，Sr and Ti are depleted, while Rb，Th，Pb and Nd are enriched. The rare earth distribution curve is of light rare earth enrichment type with right inclination，and there is obvious fractionation between light and heavy rare earth elements，with obvious negative Eu anomaly，which is consistent with the geochemical characteristics of S-type granite. It is considered through analysis that the ore-hosting granite in the Xiaguxuan area may be the product formed by the partial melting of the aluminous shallow metamorphic rock series in the upper crust due to decompression and temperature increase under the background of the transition from compression to extension in the Late Triassic. Compared with normal granite，the ore-bearing granite has a higher SiO₂ content, a multiple increase in the contents of CaO and P₂O₅，as well as the ratios of Fe₂O₃/FeO and HREE/LREE，and high contents of U and P，etc. All these indicate that the aggregation and precipitation of U in the study area are closely related to the chemical activities of P，LREE and HREE. These summarized chemical indexes are useful indicators for searching for siliceous vein type uranium mineralization in the inner zone of the granite body.

Traditional mining operations，constrained by technological limitations such as insufficient accuracy in ore body exploration and low automation levels in mining equipment，as well as natural constraints including complex geological structures and harsh underground conditions，have long suffered from persistent systemic issues including low precision in mining processes，declining production efficiency, and accumulating safety risks，thereby severely constrained the high-quality development of the mining industry. With the rapid advancement of information technology，smart mining technology has emerged as a crucial solution to address these issues and promote industrial transformation. Based on systematic analysis and summarization of key technologies in smart mining，this study designed and developed an integrated management platform to achieve intelligent management and efficient operation of smart mines. Particularly through the integration and application of communication technologies，Internet of Things (IoT)，big data analytics，and cloud computing，this platform significantly enhances mining safety and production efficiency. Through deep integration of 5G and IoT technologies，smart mining systems have significantly improved data transmission speed and stability while supporting massive real-time data transfer. IoT devices equipped with multiple sensors enable comprehensive monitoring of environmental parameters (temperature/humidity)，equipment status，and personnel positioning，establishing a highly interconnected intelligent system. The convergence of big data and cloud computing technologies effectively addresses complex and massive data demands in mining operations，achieving real-time data sharing and distributed processing while optimizing data storage and computational efficiency. Combined with big data analytics，smart mining systems can rapidly analyze multi-dimensional data and perform deep mining to provide accurate trend predictions. Future advancements in technology and management models are expected to enable higher-level intelligentization and automation in smart mines，providing robust support for the high-quality development of the mining industry.

In order to reveal the complete geological structure of Xiangshan volcanic basin and explore the metallogenic prospect and potential in the central part of the basin, the Xiangshan Uranium Field Deep Scientific Exploration phase II project deployed a 3 000 meter deep scientific borehole, named CUSD2-1, at “Xingshuxia” in the central part of the basin. To insure the smooth conduction of the drilling, we adopted the advanced AC frequency conversion electric top drive geological core drill, large diameter wireline core drilling technology, anti-inclination and control wireline core drilling tools, high efficiency diamond bit and efficient drag reducing lubricating drilling fluid, which successfully solved the technical problems of deep drilling in complex formation, such as low drilling speed in hard rock, stable hole wall in broken formation, hole leakage, anti-inclination and control in strongly deflecting formation, and safe drilling with large diameter wireline coring, and finally drilled to the predetermined depth, creating the deepest record of S (φ150 mm) diameter wireline coring in geological core drilling in China, and revealed the deep formation structure. This deep drilling provides valuable geological data for deep uranium resource exploration in Xiangshan, which not only has special significance for the scientific research and exploration of deep uranium resources, but also has great significance for the improvement of engineering technology for deep-ultra deep geological drilling.

Nuclear power thermal discharge is one of the important factors affecting the surrounding environment during its operation，which can have an impact on the temperature，water quality，and distribution of aquatic organisms in the nearby sea area. This article provided an overview of the current status of nuclear power thermal discharge monitoring technology both home and abroad，including traditional monitoring methods，remote sensing monitoring methods(satellite remote sensing，aerial remote sensing)，numerical simulations and physical model experiments，as well as emerging technologies (unmanned underwater vehicles，sensor networks and biological monitoring); the advantages and disadvantages of existing technologies and the facing challenges were analyzed，an outlook was provided on future technological development trends，emphasizing the importance of high-resolution satellite remote sensing technology，unmanned aerial vehicle remote sensing technology，and intelligent real-time monitoring systems. The review provides reference for nuclear power plant thermal discharge monitoring，promote innovation and development of related technologies，and better reservation of the marine environment.

Pingxi pluton is located in the northern section of the Taoshan-Zhuguang uranium mineralization belt，and a number of uranium mineralization occurrences have been found in the pluton by previous researchers，However，the systematical study were conducted on the uranium metallogenic conditions such as lithology，structure and alteration in the area，and the overall evaluation of uranium resource potential was not completed and no specific suggestions or opinions been put forward in the main mineralization control factors for the uranium exploration. In order to find the direction of next exploration，this paper systematically discussed the uranium mineralization characteristics of the pluton by geological investigation，physical survey and chemical analysis，analyzes the conditions of uranium mineralization and ore-controlling factors. The study concluded that the Pingxi pluton is a multi-stage S-type uranium-producing granite，with strong magmatic-tectonic hydrothermal activity，uranium mineralization is mainly controlled by the NNE-NE oriented fracture，and located at the intersection of different striking of fractures，the ore body is set in the fissures of the secondary fracture，which is often accompanied by multi-phase hydrothermal alteration，the hematitization and silicification is the main prospecting sign. The predicted favorite mineralization sectors are Shuangkeng-Fuzhu section where strong magmatic hydrothermal activity occurred in the early to late Yanshan period，with northeast trending Shankeng-Pingxi and northwest trending Luyuan-Hexi-Fuzhu ore controlling faults which extend stably into the deep with strong hydrothermal alteration such as silicification，hematitiztion and pyritization，and geophysical and geochemical anomalies are developed in the shallow and deep. Therefore there is great metallogenic potential in the deep and peripheral areas.

To appropriate deal the high-level radioactive waste with internationally recognized method, deep geological disposal repository with multibarrier system is being planned to construct in China. As one of the most important engineering barriers，the canister should maintain integrity and avoid any deformation to meet the safety functions of containing radioactive waste and isolating it from groundwater over the design lifetime. Therefore，it is crucial to reasonably design the shape and thickness of the canister. The properties of the canister materials are important factors affecting the shape and thickness design of the canister. Carbon steel is one of the candidate materials for high-level waste canister in China. Since Japan has chosen carbon steel as the canister material and has completed the trial production of the canister， this paper mainly systematically introduced the design concept about basic shape and thickness of the canister for high-level radioactive in Japan，and analyzed the key factors that need to be considered in the design of the shape and thickness for the canister. Also, emphasis was placed on the determination of the pressure thickness parameter and radiation shielding thickness parameter to provide guidance for the design of the canister for high-level radioactive in China.

This article analyzes the petrological characteristics，geochemical features，provenance composition，structural background, and sedimentary environment of uranium bearing sandstone in the lower member of the Toutunhe formation in the Louzhuangzi area by the methods of geochemical analysis，microscopic identification and core observation，and preliminarily explores their relationship with uranium mineralization. The results show that the tectonic background of the ore-bearing sandstone source rocks in the lower member of the Toutunhe formation is mainly the active continental margin and the passive continental margin. The special tectonic background provided favorable conditions for the migration of uranium. The source of sandstone debris was dominated by neutral igneous rock，and the parent rock was mainly calc-alkaline granite with a small amount of pyroclastic rock，sedimentary rock and metamorphic rock，which indicated the sandstone from multi-source nature，and has a good uranium source. The sandstone formed in a warm and humid paleoclimate and the source rock was strongly weathered. The sandstone is rich in reducing medium，reflecting that the lower member of Toutunhe formation was in a reducing environment and has good primary reduction ability. The content of major elements of the sandstone debris in the target layer has the characteristics of rich alkali，high silicon and weak aluminum，and the ore-bearing sandstone are of lower w(SiO₂) and w(Al₂O₃) and higher w(CaO) than those of the sterile sandstone. The difference of component content in the sand body of the ore-bearing member is characterized by strong clay alteration and carbonate development. U，Mo and Se are relatively enriched，and other trace elements are relatively depleted except for Ga，which is comparable to the sedimentary rocks in China. The content of trace elements in ore-bearing samples of the same borehole is generally higher than that in sterile samples， U，Mo，Se，V，Ge，Ti，Sc and Y are significantly increased, which indicated that the trace elements in the sand body of the target layer also have migrated and enriched in the uranium mineralization process.

This paper established a high-temperature infrared method to determine the total carbon in nuclear grade boron carbide. The optimal experimental conditions were determined by studying the testing temperature，sample weight，selection of flux，and flux coverage method. At the same time, accuracy，precision，detection limit and quantification limit of the method were determined. The results show that the optimal testing temperature is 1 400 ℃，which not only ensures the release of total carbon but also extends the service life of the instrument. The optimal sample weight is 20-30 mg. Tin particles has the best melting effect，and boron carbide has the highest carbon release efficiency. The best coverage method was found to be 0.4 g tin particle + boron carbide + 0.6 g tin particle，and the carbon in boron carbide was totally released. The high-temperature infrared method for determining total carbon in nuclear grade boron carbide is good in accuracy and precision，the test results of boron carbide certified reference material are all within the uncertainty range of the certified value, while the RSD is<1.5 %, and the detection limit of the method is 0.001 9 %. This method is simple and fast，it can meet the requirements for measuring total carbon in nuclear grade boron carbide.