ML20024C915
| ML20024C915 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 07/08/1983 |
| From: | Barrett L Office of Nuclear Reactor Regulation |
| To: | Kanga B GENERAL PUBLIC UTILITIES CORP. |
| References | |
| CON-NRC-TMI-83-041, CON-NRC-TMI-83-41 NUDOCS 8307190432 | |
| Download: ML20024C915 (3) | |
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DN 50-320 NRC PDR Local PDR DCS TMI b te r/f TMI HQ r/f NRC/TMI-83-041 ar t July 8, 1983 TCPoindexter RWeller PJGrant AFasano JWiebe LChandler Docket No. 50-320 nt I&E.(3) en ce Ust 14r. B. K. Kanga, Director Three Mile Island Unit 2 GPU Nuclear Corporation P. O. Box 480 Middletown, PA 17057
Dear Mr. Kanga:
Subject:
Undersized Welds on Head and Internals Handling Fixture Assembly (Tripod) Docket No. 50-320 GPUN has reported that numercus undersized welds were discovered during a June 8, 1983 inspection of the head lift tripod. Additionally, members of our respective staffs have had preliminary discussions on this subject on June 21, 1983.
In view of the importance associated with assuring that this equipment can perform its intended function safely, the NRC staff requests that you submit for NRC review and approval your detailed plans and associated rationale for any corrective action which may be required. Also include a detailed discussion of the stress analyses that are being performed, acceptance criteria for visual inspections, any plans for non-destructive testing (NDT) and an analysis of the potential for damage to the welds as a result of past usage of the tripod. You should also discuss any HDT that is being planned to verify present weld integrity or the integrity of any re-welding that may be done.
If you are not planning to do a magnetic particle or liquid penetrant test to test surface weld integrity in addition to any subsurface weld testing, you should justify this decision in your submittal.
Copics of all inspection reports on the TMI-2 tripod should also be forwarded to the NRC. This should include copics of the initial inspection report for the tripod, including HDT results that were originally used to certify the structure for use. Finally, you should provide a comparison of your proposed plans with the actions taken to resolve similar problems discovered at other B&W reactors.
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NRC FORM 318 (10-80) NRCM 0240 O FFICI AL RECORD COPY
Mr. B. K. Kanga July 8, 1983 Approval of your sub;aittal is required before the tripod will be used to
' support any loads in containment.
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n Lake H. Barrett Deputy Program Director THI Program Office cc:
J. J. Barton J. J. Chwastyk J. J. Byrne J. E. Larson R. L. Freemerman E. G. Wallace i
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