ML050840384
| ML050840384 | |
| Person / Time | |
|---|---|
| Site: | Susquehanna  |
| Issue date: | 03/15/2005 |
| From: | Chan T NRC/NRR/DE/EMCB |
| To: | Linden R Susquehanna |
| Naujock D, NRR/DE/EMCB, 415-2767 | |
| References | |
| Download: ML050840384 (5) | |
Text
March 15, 2005 Mr. Randy T. Linden, Chairman Performance Demonstration Initiative, Inc.
769 Salem Boulevard (NUCSA1)
P.O. Box 467 Berwick, PA 18603-0467
SUBJECT:
PERFORMANCE DEMONSTRATION INITIATIVE DATA BASE VARIABLES OF INTEREST
Dear Mr. Linden:
On October 19 and 20, 2004, the staff participated in a public meeting with representatives from the Electric Power Research Institute - Performance Demonstration Initiative (PDI) to discuss the implementation of Appendix VIII, Performance Demonstration for Ultrasonic Examination Systems, of the American Society of Mechanical Engineers, Boiler and Pressure Vessel Code (Code). As part of the implementation process, PDI maintains a data base containing the individual performance demonstration test parameters and test results. It is our understanding that the data base is being reviewed by PDI for data entry accuracy, and is being restructured to improve the ability to perform data sort and analysis.
At the meeting, the staff expressed an interest in reviewing some of the information contained in the data base. The purpose of the review is to study the effectiveness of performance-based ultrasonic testing. However, all of the variables of interest to the staff may not be in the current data base. PDI indicated that these variable may be added to the new data base during the restructuring process. To accommodate the staffs interest, PDI asked the staff for a list of variables of interest. The requested information is in the Enclosure to this letter.
Sincerely,
/RA/
Terence L. Chan, Chief Piping Integrity and NDE Section Materials and Chemical Engineering Branch Division of Engineering Office of Nuclear Reactor Regulation
Enclosure:
As stated
ML050840384 OFFICE EMCB:DE E
EMCB:DE NAME DGNaujock TLChan DATE 03/15/2005 03/15/2005
Enclosure PERFORMANCE DEMONSTRATION DATA BASE VARIABLES AND DATA OF INTEREST Examination Data
- 1. Appendix VIII - Supplement number being tested.
- 2. Identify special tests, such as, test for intergranular stress corrosion cracking (IGSCC), etc.
- 3. Date procedure was qualified.
a.
Examination process - manual or automatic.
b.
Examination surface - performed from outside or inside, curved or flat surface. If pipe, identify the pipe diameter.
c.
Side of weld examined - near side, far side, or both sides.
d.
UT technique or combination of techniques used - (phased array, computer focusing, synthetic aperture focusing technique algorithm, pitch-catch, pulse-echo, time-of-flight locus-curve, etc.).
Personnel Performance Demonstration Data 1.
Date recorded for the test and unique identity assigned to the test.
2.
Equipment essential variables, and transducer angles, frequencies, wave modes.
3.
Test specimen and its unique identity:
a.
For each flaw, provide unique identity with specimen identity; true dimensions; type (IGSCC, thermal fatigue crack, mechanical fatigue crack, notch, fabricated crack, slag, lack-of-fusion, porosity, etc); location (10-30% through-wall, 30-60%
through-wall, 60-100% through-wall, and in the weld, heat affected zone, base metal, cladding, ligament, etc); orientation (axial, circumferential, laminar, off-axis); and any other special characteristics.
b.
Specimen particulars: material used (wrought carbon steel, cast carbon steel, wrought stainless steel, static cast stainless steel, centrifugal cast stainless steel, wrought nickel base); through-wall thickness; if curved, outside diameter.
c.
Examination limitations (taper, counterbore, crown, undercut, misalignment, etc).
d.
Test inspection volume required by Section XI of the ASME Code, (inner 1/3, inner 15%, outer 85%, through-wall, etc.). Other examination volume, such as,Section III through-wall.
Test Performance Data (Pass, Fail, or testing error/not completed) 1.
Reason for failure (failed detection, excessive false calls, exceeded root mean square error, terminated before completion, etc.).
2.
Type of demonstration (detection, length sizing, or depth sizing).
3.
Flaws in the demonstration.
a.
Total number of flaws in the demonstration.
b.
Identify each flaw detected.
c.
Identify each flaw not detected.
d.
Total number of false calls (separately report false positives and false negatives).
e.
Provide length or depth measurement error.
f.
Identify the factors contributing to each flaw not detected and each false call.
Personnel Data 1.
Skill Level of the examiner (i.e., Level II or Level III), years of UT experience and years of UT experience in the nuclear industry.
2.
Number of prior attempts for this supplement or special test.
3.
Number of training hours leading up to the performance test (in the two months leading up to the performance demonstration).
4.
Number of prior Appendix VIII and IGSCC qualification (limit to 6 maximum).