ML19257C803
| ML19257C803 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 12/06/1979 |
| From: | Warren M NEWPORT NEWS INDUSTRIAL CORP. (SUBS. OF NEWPORT NEWS |
| To: | |
| Shared Package | |
| ML19257C801 | List: |
| References | |
| REF-PT21-79-188-000 55-289, NUDOCS 8001300471 | |
| Download: ML19257C803 (1) | |
Text
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Newport News Industrial subsidiary of CorporatiOG Newport News Shipbuilding ATenneco Company 55-289 230 41st Street
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2aco7 g _fg g o a (804) 380-7273 December 6,1979 United States Nuclear Regulatory Commission Region IV 611 Ryan P1aza Drive, Suite 1000 Arlington, Texas 76011
' Attention:
Mr. Dolph Whitsell
Subject:
Beaver Valley Unit 2 Neutron Shield Tank Owner, Duquesne Light Company Gentlemen:
This letter is to confi.rm my conversation with Mr. Dolph Whitsell on December 3,1979 concerning a potentially reportable problem related to us by Duquesne Light Company.
Involved is a Neutron Shield Tank which serves as the primary support for the Reactor Vessel, fabricated to the requirements of ASME Section VIII Division I furnished by NNIC, but as yet not installed.
Briefly, the problem is as follows:
An overlap condition was observed at the toe of a 1/2" fillet weld joining the 1 1/2" skirt to the 4" base.
Upon grinding of the overlap a linear indication was discovered and appears to be continuous around a significant portion of the circumference of the structure.
During fabrication this weld was subjected to an MT inspection of the root, every 3rd layer, and final.
Following these inspections the structure was subjected to Post Weld Heat Treatment.
We plan to resolve this problem by removing any defective areas, rewelding and performing appropriate NDE.
If there are any questions regarding this situation, please do not hesitate to call.
Your very truly, i
4 l
H. V. Warren Quality Assurance Engineering 1833 282.
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