Thimble vibration analysis and monitopring on 1300 and 900 MW reactors using accelerometers and in core neutron noise

Trenty, A.; Puyal, C.; Vincent, C.H.; Inchauspe, M.H.; Baeyens, R.; Messainguiral-Bruynooghe, Ch.; Lagarde, G.

doi:10.1016/0149-1970(88)90024-8

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“…Nowadays safety of the nuclear power plant becomes more and more important along a big number of nuclear power plants go into operation. The flow around the thimbles of the in core instrumentation induces vibration and shocks against their guides in the vessel, producing wear and even leakage of the thimbles [ 1 ]. Almost all nuclear power plants in China were concerned by this problem seriously [ 2 – 4 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of R Angle of the Outer Extension Tube against the in-Core Flux Thimble in Nuclear Power Plant on Its Wear Behavior

et al. 2021

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Wear failure of the in-core flux thimble is an important problem in the neutron flux measurement system, which threatens the safety of the nuclear power plant. To figure out the wear mechanism of the thimble, a wear tester was designed and manufactured to simulate the wear process of the in-core flux thimble. Outer guide tubes with different R angles were used to abrade the thimbles. The designed tester can well simulate the wear process in the real power plant. R angle of the outer guide tube played important role in the wear behavior of the in-core flux thimbles.

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Section: Introductionmentioning

confidence: 99%