Analytical Study on Safety of HFETR Cobalt Control Rods

Liu Shuiqing; Kang Changhu; Yang Bin; Tan Jinghua; Zou Peng; Liu Hongqian; Song Yuge; Song Jiyang

doi:10.13832/j.jnpe.2019.06.0050

Volume 40 Issue 6

Dec. 2019

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Liu Shuiqing, Kang Changhu, Yang Bin, Tan Jinghua, Zou Peng, Liu Hongqian, Song Yuge, Song Jiyang. Analytical Study on Safety of HFETR Cobalt Control Rods[J]. Nuclear Power Engineering, 2019, 40(6): 50-53. doi: 10.13832/j.jnpe.2019.06.0050

Citation:

Liu Shuiqing, Kang Changhu, Yang Bin, Tan Jinghua, Zou Peng, Liu Hongqian, Song Yuge, Song Jiyang. Analytical Study on Safety of HFETR Cobalt Control Rods[J]. Nuclear Power Engineering, 2019, 40(6): 50-53. doi: 10.13832/j.jnpe.2019.06.0050

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Analytical Study on Safety of HFETR Cobalt Control Rods

doi: 10.13832/j.jnpe.2019.06.0050

Publish Date: 2019-12-15

Abstract

Abstract

The cobalt control rods of High Flux Engineering Test Reactor (HFETR) have been in service for over 20 years. In this paper, the burnup of 59Co in HFETR and its effect on the worth of cobalt control rods are calculated and analyzed. The results show that the average burnup and maximum burnup of 9#~14# shim-rod is 4.02% and 5.45%, respectively, and that of 4# and 7# shim-rod is 6.45% and 10.38%, respectively. Considering the effect of 59Co burnup, the worth of 9#~14# shim-rod is almost unchanged, and the worth of 4# and 7# shim-rod decreases 0.15 βeff (for HFETR, 1βeff=0.0071). The sub-criticality decreases 0.16βeff because of 59Co burnup, but the position of the shut-down rod is almost unchanged. So, the effect of 59Co burnup is small, with no effect for the safety of HFETR operation.
- HFETR,
- Cobalt control rod,
- Burnup,
- Effect