Reliability analysis of helium pressure non-destructive testing method of the fuel rod

Fan HUANG; Zhenan ZHU; Hui CAO; Wenxin YU; Xiaoyuan MENG

doi:10.11889/j.0253-3219.2023.hjs.46.070607

Journals >NUCLEAR TECHNIQUES >Volume 46 >Issue 7 >Page 070607 > Article

NUCLEAR TECHNIQUES
Vol. 46, Issue 7, 070607 (2023)

Reliability analysis of helium pressure non-destructive testing method of the fuel rod

Fan HUANG^*, Zhenan ZHU, Hui CAO, Wenxin YU, and Xiaoyuan MENG

Author Affiliations

CNNC Nuclear Fuel Components Co., Ltd., Yibin 644000, China

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DOI: 10.11889/j.0253-3219.2023.hjs.46.070607 Cite this Article

Fan HUANG, Zhenan ZHU, Hui CAO, Wenxin YU, Xiaoyuan MENG. Reliability analysis of helium pressure non-destructive testing method of the fuel rod[J]. NUCLEAR TECHNIQUES, 2023, 46(7): 070607 Copy Citation Text

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Fig. 1. Principle diagram of puncture manometry method

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Fig. 2. Diagram of helium pressure measurement using the heat transfer method

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Fig. 3. Snapshot of non-destructive testing equipment for measurement of helium pressure inside fuel rod

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Fig. 4. Structural diagram of a standard rod

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Fig. 5. Test results of standard rods with three different helium pressures (a) Helium pressure value of 0.98 MPa, (b) Helium pressure value of 1.76 MPa, (c) Helium pressure value of 2.45 MPa

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Fig. 6. Deviation distribution between non-destructive testing data and puncture manometry data

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Fig. 7. Comparison chart of test results using nondestructive testing method for test rod 4-1 (a) Summer, (b) Winter

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Fig. 8. Relationship between helium pressure value and temperature in the non-destructive testing of experimental rod 4-1(a) Summer, (b) Winter

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序号Number	对应后7位棒号Rod number	棒自身温度Temperature of the rod itself	测量间隔时间Measurement interval time / min	测量次数Number of measurements	环境温度Ambient temperature / ℃
1-1	2370299	与环境温度一致Consistent with ambient temperature	2	20	28
1-2	2390556				29
1-3	2420178				29
1-4	2450656				30
1-5	2460624				30
1-6	2550899				27
1-7	2600303				26
1-8	2730543				25
1-9	2780432				24
1-10	2810405				24
2-1	2580933	与环境温度一致Consistent with ambient temperature	1	20	27
2-2	2630614				26
2-3	2660314				26
2-4	2701024				27
2-5	2751104				26
2-6	2940287		0,2		27
2-7	3100154		0		25
3-1	2870898	刚经过清洗与热烘Just undergone cleaning and hot drying	1	20	27
4-1	0710250	与环境温度一致Consistent with ambient temperature	2	每日10次10 times daily	每日变化Daily changes

Table 1. Information and variable control of the fuel rods tested in the experiment

序号Number	标准棒氦压值Helium pressure value of standard rod / MPa	实测值Measured value / MPa	序号Number	标准棒氦压值Helium pressure value of standard rod / MPa	实测值Measured value / MPa
1	0.98	0.98	11	0.98	0.97
2	0.98	0.97	12	0.98	0.97
3	0.98	0.98	13	0.98	0.98
4	0.98	0.98	14	0.98	0.97
5	0.98	0.98	15	0.98	0.97
6	0.98	0.98	16	0.98	0.97
7	0.98	0.98	17	0.98	0.98
8	0.98	0.97	18	0.98	0.98
9	0.98	0.99	19	0.98	0.98
10	0.98	0.98	20	0.98	0.97

Table 2. Test results of the standard rod (0.98 MPa)

序号Number	标准棒氦压值Helium pressure value of standard rod / MPa	实测值Measured value / MPa	序号Number	标准棒氦压值Helium pressure value of standard rod / MPa	实测值Measured value / MPa
1	1.76	1.76	11	1.76	1.76
2	1.76	1.76	12	1.76	1.77
3	1.76	1.76	13	1.76	1.77
4	1.76	1.76	14	1.76	1.77
5	1.76	1.77	15	1.76	1.77
6	1.76	1.77	16	1.76	1.76
7	1.76	1.75	17	1.76	1.75
8	1.76	1.77	18	1.76	1.76
9	1.76	1.76	19	1.76	1.78
10	1.76	1.76	20	1.76	1.76

Table 3. Test results of the standard rod (1.76 MPa)

序号Number	标准棒氦压值Helium pressure value of standard rod / MPa	实测值Measured value / MPa	序号Number	标准棒氦压值Helium pressure value of standard rod / MPa	实测值Measured value / MPa
1	2.45	2.45	11	2.45	2.45
2	2.45	2.43	12	2.45	2.44
3	2.45	2.43	13	2.45	2.43
4	2.45	2.42	14	2.45	2.44
5	2.45	2.42	15	2.45	2.43
6	2.45	2.44	16	2.45	2.45
7	2.45	2.45	17	2.45	2.43
8	2.45	2.44	18	2.45	2.42
9	2.45	2.42	19	2.45	2.46
10	2.45	2.44	20	2.45	2.43

Table 4. Test results of the standard rod (2.45 MPa)

序号Number	无损检测法数据平均值NDT data mean / MPa	标准差Standard deviation / MPa	穿刺测压法换算结果Conversion result of puncture pressure measurement method / MPa	偏差（无损-穿刺）Deviation (lossless-puncture) / MPa	环境温度Ambient temperature / ℃
1-1	2.131	0.010	2.139	-0.008	28
1-2	2.140	0.009	2.149	-0.009	29
1-3	2.149	0.006	2.148	0.001	29
1-4	2.151	0.006	2.165	-0.014	30
1-5	2.165	0.006	2.151	0.014	30
1-6	2.142	0.006	2.146	-0.004	27
1-7	2.162	0.010	2.170	-0.008	26
1-8	2.223	0.009	2.194	0.029	25
1-9	2.175	0.009	2.177	-0.002	24
1-10	2.179	0.009	2.182	-0.003	24

Table 5. Comparison between non-destructive testing method and puncture manometry data

序号Number	测量间隔时间Measurement interval time / min	棒自身温度Temperature of the rod itself	无损检测法数据平均值NDT data mean / MPa	标准差Standard deviation / MPa	穿刺测压法换算结果Conversion result of puncture pressure measurement method / MPa	偏差（有损-穿刺）Deviation (damage-puncture) / MPa	环境温度Ambient temperature / ℃
2-1	1	与环境温度一致Consistent with ambient temperature	2.148	0.011	2.162	-0.014	26
2-2			2.187	0.006	2.197	-0.010	26
2-3			2.150	0.009	2.182	-0.032	26
2-4			2.175	0.009	2.208	-0.033	27
2-5			2.176	0.008	2.184	-0.008	27
2-6	2		2.173	0.009	2.201	-0.028	27
2-6	0		2.159	0.010	2.201	-0.042	27
2-7	0		2.169	0.013	2.220	-0.051	24
3-1	1	刚经过清洗与热烘Just undergone cleaning and hot drying	2.128	0.007	2.208	-0.080	26

Table 6. Comparison of test rods using two methods for different single measurement time intervals and fuel rod temperature

日期Date	环境温度Ambient temperature / ℃	标准棒标定值Helium pressure value of standard rod / MPa
日期Date	环境温度Ambient temperature / ℃	0.98	1.76	2.45
8月5日August 5	30	0.98	1.77	2.46
8月17日August 17	25	0.98	1.78	2.47
9月1日September 1	24	1.00	1.78	2.45
9月19日September 19	23	1.01	1.79	2.45
10月12日October 12	22	1.02	1.81	2.47

Table 7. Trend of calibration value of non-destructive testing equipment over time during testing (partial data)

Fan HUANG, Zhenan ZHU, Hui CAO, Wenxin YU, Xiaoyuan MENG. Reliability analysis of helium pressure non-destructive testing method of the fuel rod[J]. NUCLEAR TECHNIQUES, 2023, 46(7): 070607

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