摘要
固体磷酸三钠(TSP)属于强碱弱酸盐,具有较强的碱性和较高的溶解度,化学性质稳定,能够长期保存。在安全壳喷淋系统(EAS)的喷淋水中添加TSP替代NaOH,能够调节喷淋液的pH值,有效地除去从泄漏的冷却水中释放至安全壳中的碘气体,避免强碱对工作人员的伤害,易于事故后的清理。本文对TSP在EAS系统中的应用进行了分析研究,计算了TSP的用量、pH值调节能力和溶解时间,初步确定了化学物贮存箱的结构、设置方式。在安全壳地坑旁安装TSP贮存箱,使用TSP替代氢氧化钠(NaOH)溶液是可行的。
Trisodium phosphate（TSP） belongs to strong acid-weak base salt,having the strong alkales-cence,good solubility and steady chemical property.It can be preserved for a long time.In order to provide the effective trapping of iodine in the water and to prevent the stress corrosion cracking of the metal material,it is necessary to buffer the acid and raise the pH by the addition of trisodium phosphate in the spray water.We have studied TSP application in EAS system through the calculation of TSP quantity,and the ability to adjust pH and dissolution time.The structure and the layout of TSP storage tank could be confirmed.It is concluded that the setting of TSP container beside the containment sump,sodium hydroxide could be replaced by trisodium phosphate.
出处
《核动力工程》
EI
CAS
CSCD
北大核心
2011年第2期137-140,共4页
Nuclear Power Engineering
