The development of nuclear energy is inseparable from the treatment and disposal of radioactive waste. Geopolymer is a promising radioactive waste solidification material. In this study，metakaolin was used as the substrate to prepare metakaolin polymer, which was used to solidify Cs and real radioactive waste. The properties of metakaolin geopolymer were investigated by characterization and leaching experiments. Characterization experiments show that metakaolin geopolymer with three-dimensional network structure has high compressive strength, which can meet the strength requirements of radioactive waste solidified body. At the same time, the solidification of Cs in metakaolin polymer is uniform. However， the incorporation of Cs will hinder the growth of silicon and aluminum network skeleton and reduce the gel structure of the system，resulting in the increase of porosity and the decrease of compressive strength of geopolymer cured body. The leaching experiments of Cs and real waste water in deionized water and real groundwater show that metakaolin polymer has excellent Cs retention ability，and has low leaching rate and cumulative leaching fraction，which is better than the value specified in the national standard. In general，metakaolin geopolymer performs well in physical compression resistance and Cs retention，and is a material with great application potential.

With the rapid development of China’s nuclear power industry，the impact of thermal discharge on the surrounding marine environment is increasingly attracting attention. Objective and accurate background temperatures are crucial for accurately assessing the thermal effects of warm water discharge. In this article, the sea area near a nuclear power plant in Fujian was studied. Based on long-term thermal infrared satellite data before the operation of the first unit，the distribution of sea surface temperature field under different seasons and tidal conditions was obtained through temperature inversion. By using grid method and correlation analysis method，the sub zones with the highest temperature correlation inside and outside the submersible discharge area were determined，and a continuous background temperature field with multi-point temperature coupling was constructed. The temperature rise field was extracted using recent thermal infrared satellite data，and the impact of the operation of four units on the temperature rise in the nearby sea area was evaluated. The results shows that using the multi-point temperature substitution method to extract the reference temperature is effective and reliable. Before the operation of nuclear power，the temperature field in the study area showed significant temperature differences and band like distribution characteristics：in winter，the temperature gradually decreased from offshore to nearshore，while in summer and other months with higher temperatures，the opposite trend was observed. After the operation of the nuclear power plant，there was a significant temperature rise area in the sea area near the discharge outlet. During the ebb tide period，the temperature discharge mainly affected Qingchuan Bay，while during the flood tide period，both Qingchuan Bay and Wendu Bay were affected. The area of temperature rise exceeding 2.0 ℃ is larger in winter than in summer under the same tidal state，and the area during high tide is larger than that during low tide in the same season.

Pyrite is the most common metal sulfide mineral in mineral deposits，mostly formed at the stages of uranium mineralization. Its typological characteristics have important indicative significance for deep mineral exploration and prediction. This article uses electron microscopy，powder diffraction，thermoelectric analyzer，and electron probe system to analyze the typological characteristics of pyrite at different mineralization stages and elevations in the Shulouqiu uranium deposit. The research results show that the n（S）/n（Fe） values of pyrite in this area indicate a deficiency in S characteristics. Analysis of characteristic elements such as δFe，δS，As，Se，Co，Ni，etc. shows that the genesis of pyrite in this area is mainly magmatic hydrothermal. The characteristics of the crystal cell parameters of pyrite indicate that the substitution of S with As in a isomorphic form is the main cause of the increase in a₀ and also an important factor leading to the precipitation of U element. The thermoelectric coefficient value （a）of pyrite is -301.0~332.2 μV·℃^-1，and the thermal conductivity type is mainly P-type. The formation temperature of pyrite is 74~386 ℃，belonging to a medium low temperature deposit. The thermal electric coefficient dispersion （δa′）of pyrite indicates a mineralization period with a δa’of 82.1，indicating a relatively stable mineralization environment and a weak degree of superposition；The δa’values in the early and late stages of mineralization are 201.6 and 224.9，respectively，indicating that they may have been formed by the superposition of multiple stages of hydrothermal fluids，with a relatively high degree of superposition； The δa′ values at each stage gradually decrease with the decrease of levels，and are relatively concentrated，indicating that the mineralization become relatively better as the depth increases. The thermoelectric parameter X_np of pyrite is -40.0~61.0，and the erosion percentage（γ） of the ore body is 34.8 %~60.0 %，with an average of 48.9，indicating that the deposit has been eroded to the middle and still has significant extension in the deeper part. Comprehensive analysis suggests that there is still good mineralization and prospecting potential in the deep part of the deposit.