Accurately accounting for sizing uncertainty in inspection

1. A method, comprising:

receiving plural sets of values corresponding to plural matched pairs of anomalies from a first inspection and second inspection following the first inspection, a first portion of each pair corresponding to the first inspection and a second portion of each pair corresponding to the second inspection, the plural sets of values corresponding to wall loss information for plural locations of a fluid carrying vessel;

computing by a processor first and second statistical descriptions of a respective accuracy of the first and second inspections; and

computing by the processor a revised estimate of the plural sets of values based on the first and second statistical descriptions;

further comprising computing by the processor growth rates for the anomalies of each matched pair based on the revised estimate.

2. The method of claim 1 , wherein the computation of the growth rates is based on historical measured growth rates.

3. The method of claim 1 , wherein the computation of the growth rates is based on historical measured anomaly sizes.

4. The method of claim 1 , wherein the growth rate comprises a corrosion rate.

5. The method of claim 1 , wherein the anomalies comprise a measured maximum wall thickness deterioration.

6. A system, comprising:

a memory with logic; and

a processor configured to execute the logic to:

receive plural sets of values corresponding to plural matched pairs of anomalies from a first inspection and second inspection following the first inspection, a first portion of each pair corresponding to the first inspection and a second portion of each pair corresponding to the second inspection, the plural sets of values corresponding to wall loss information for plural locations of a fluid carrying vessel;

compute first and second statistical descriptions of a respective accuracy of the first and second inspections;

compute a revised estimate of the plural sets of values based on the first and second statistical descriptions; and

compute corrosion rates for the anomalies of each matched pair based on the revised estimate.

7. The system of claim 6 , wherein the computation of the corrosion rates is based on historical measured corrosion rates.

8. The system of claim 6 , wherein the computation of the corrosion rates is based on historical measured anomaly sizes.

9. The system of claim 6 , wherein the anomalies comprise a measured maximum wall thickness corrosion.

10. The system of claim 6 , wherein the processor is further configured with the logic to identify the plural matched pairs of anomalies.

11. A non-transitory computer readable medium containing computer instructions stored therein for causing a computer processor to perform steps comprising:

receiving plural sets of values corresponding to plural matched sets of anomalies from plural inspections separated in time, each set comprising plural portions, each portion corresponding to a respective inspection, the plural sets of values corresponding to wall loss information for plural locations of a fluid carrying vessel;

computing statistical descriptions of a respective accuracy for each of the plural inspections;

computing a revised estimate for each of the plural sets of values based on the statistical descriptions; and

computing growth rates for the anomalies of each of the matched sets based on the revised estimate.

12. The non-transitory computer readable medium of claim 11 , wherein the computation of the growth rates is based on historical measured corrosion rates.

13. The non-transitory computer readable medium of claim 11 , wherein the computation of the growth rates is based on historical measured anomaly sizes.

14. The non-transitory computer readable medium of claim 11 , wherein the anomalies comprise a measured maximum wall thickness growth.

15. The non-transitory computer readable medium of claim 11 , wherein the processor is further configured with the software code to identify the anomalies of each set that match.