In connection with the use of the SPZO-M modernized system for prestressing the NPP containment, it became necessary to determine the effect of loads inside the containment wall on the stress-strain state of the containment. Because of the particularities of the technology used to install the reinforcing elements, where the ducts are filled with grout under pressure up to 1 MPa, there is a possibility of cracking at the construction stage of the structure. Calculations established that on simultaneous injection of the middle and outer or inner channels the maximum principal stresses in the thinnest zones between the crossing channels reach the tensile strength of concrete 2 MPa. For this reason, it is recommended that simultaneous injection of these channels should be excluded. On prestressing and long-term operation, tensile stresses act in the radial reinforcement that can cause cracks to appear in the containment wall. On using the SPZO-M system, the radial stresses in the rod reinforcement increased by 19.4% compared to SPN-1000. Measures are proposed to limit cracking in the containment body.

结合使用 SPZO-M 现代化系统对 NPP 安全壳施加预应力，有必要确定安全壳壁内载荷对安全壳应力应变状态的影响。由于用于安装增强元件的技术的特殊性，管道在高达 1 MPa 的压力下填充水泥浆，因此在结构的施工阶段可能会出现裂缝。计算表明，在同时注入中间和外部或内部通道时，交叉通道之间最薄区域的最大主应力达到混凝土 2 MPa 的抗拉强度。因此，建议排除这些通道的同时注入。在预应力和长期运行方面，拉应力作用在径向钢筋中，可能导致安全壳壁出现裂缝。与 SPN-1000 相比，使用 SPZO-M 系统时，杆加强件中的径向应力增加了 19.4%。建议采取措施来限制安全壳中的开裂。