ML19241B151
| ML19241B151 | |
| Person / Time | |
|---|---|
| Site: | Wolf Creek  |
| Issue date: | 05/17/1979 |
| From: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | |
| Shared Package | |
| ML19241B144 | List: |
| References | |
| 50-482-79-08, 50-482-79-8, NUDOCS 7907110740 | |
| Download: ML19241B151 (1) | |
Text
I STN 50-482/79-03 Appendix B NOTICE OF DEVIATION Based on the results of the NRC inspection conducted on April 16-19, 1979, it appears that one of your activities deviate from your comnit-ment to the Commission in the Preliminary Safety Analysis Report (PSAR) as indicated below:
Improper Penetrameter Size Specification SNUPPS PSAR Section 3.12 commits to Regulatory Guide 1.19, August 11,1972, " Nondestructive Examination of Primary Con-tainment Liner Welds," except for the following minor deviations, one of which is, "All nondestructive examination methods and techniques are in accordance with Section V of the ASME Boiler and Pressure Vessel Code, except for radiography which is in accordance with Appendix X of ASME Section III."
(Appendix X to Section III and Article 2 of Section V are acceptable methods of meeting the requirements of Regulatory Guide 1.19, since their examination requiremert; are equivalent to those required by the Regulatory Guide.)
Appendix X to Section III of the ASME Boiler and Pressure Vessel Code Table X-3325.1-1, "Stardard Penetrameter Sizes," requires that a penetrameter for weld thickness range of over 1/4" through 3/8" be of a thickness of 0.0075" and designated a No. 7 penetra-meter. The liner plate is 1/4" thick.
Contrary to the above:,
Bechtel Specification No.10466-C151(Q), paragraph 7.5.1.a requires that liner seam welds be examined radiographically in accordance with the requirements of Article 3, A"'1E Section V, which requires in Table T-320, " Thickness Penetrameter Desig-nations and Essential Holes," that a penetrameter for a single wall material thickness range of over 1/4" through 3/8" be a size No.12, which has a penetrameter thickness of 0.012".
This No.12 penetrameter is 60% thicker than the No. 7 penetrameter that is specified in Appendix X to Section III of the ASME Boiler and Pressure Vessel Code.
This is a deviation.
n-7907110740