秦山第二核电厂阀门类设备弱贯穿辐射调查

Abstract

Abstract: The radiation sources and weak penetration radiation of the main valves in four systems of the RCP, RRA, RCV and PTR are monitored during the eight outages in Qinshan phase II nuclear power plant. ^110mAg is the main radioactive nuclide measured in valve deposition of RCV system. ⁵⁸Co,⁶⁰Co,⁹⁵Nb,⁹⁵Zr,⁵¹Cr and other radionuclides are deposited in valves of RCP, RRA and PTR systems. The associated β ray energy is mainly in the range of 500 keV. TheH·^*(10),H·′(0.07) and H·′(3) are measured for four types of valves. The value of H·′(3) /H·^*(10) is about 1.24, and the value of H·′(0.07)/H·^*(10) is about 14. According to the measurement results, monitoring of eye lens and skin dose for maitenance workers in some key valves are suggested.

Key words: nuclear power plant, valve, radiological, weak penetration radiation

CLC Number:

TL75+1

WANG Chuan, WEI Yingjing, NI Wei, LIU Liye, CHEN Chenxiang, CAO Qinjian. Investigation on weak penetration radiation of valves in Qinshan phase II nuclear power plant[J].RADIATION PROTECTION, 2018, 38(6): 457-464.

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Investigation on weak penetration radiation of valves in Qinshan phase II nuclear power plant

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