研究性重水反应堆改建后,功率将提高50％,最大中子通量也将提高一倍左右。因此,某些控制棒的发热量也必然增加。尤其是自动棒,它经常在氦气中运行,棒的释热问题必须引起重视。 反应堆原用的控制棒是由许多镉块组成(见图1)。在自动棒导管内充以氦气作导热介质。它的温升和中子通量有关,也和散热条件有关。根据四次实测数据,并顺曲线延伸,画出棒的温升曲线,如图2所示。 After the reconstruction of the research heavy water reactor, the power will be increased by 50% and the maximum neutron flux will be doubled. Therefore, some of the control rod heat must also increase. In particular, auto sticks, which are often run in helium, have to attract attention. The original control rods for the reactor consisted of many cadmium blocks (see Figure 1). In the automatic rod filled with helium as a heat conducting medium. Its temperature rise and neutron flux, but also with the cooling conditions. According to four measured data, and follow the curve extension, draw a good temperature curve, as shown in Figure 2.