ML20136E954
| ML20136E954 | |
| Person / Time | |
|---|---|
| Site: | 05000000, Vogtle |
| Issue date: | 05/17/1984 |
| From: | Liaw B Office of Nuclear Reactor Regulation |
| To: | Adensam E Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML082840446 | List:
|
| References | |
| FOIA-84-663 NUDOCS 8405290028 | |
| Download: ML20136E954 (4) | |
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UNITED STATES
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l NUCLEAR REGULATORY COMMISSION o
pY WASHINGTON, D. C. 20555
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YAY 171984 k
i Docket Nos.
50-424/425 MEMORANDUM FOR:
Elinor Adensam, Chief Licensing Branch #4 Division of Licensing FROM:
B. D. Liaw, Chief Materials Engineering Branch
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Division of Engineering
SUBJECT:
QUESTIONS FOR V0GTLE 1 AND 2 SECTIONS 4.5.1, 4.5.2, 5.2.3, 5.3.1 (MATERIALS & FABRICATION), 5.4.2.1, 6.1.1, AND 10.3.6 Plant Name: Georgia Power Co., Vogtle Electric Generating Plant, Units 1 and 2 Suppliers: Westinghouse /Bechtel Licensing Stage:
OL Docket Number:
50-424/425 Reviewer:
D. E. Smith Responsible Branch & Project Manager: LB #4; M. Miller Description of Task: Draft Safety Evaluation Report
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Date Reviewed: 5/2/84 d
Review Status:
Request for Additional Information The Materials Application Section, Materials Engineering Branch, Divison of Engineering, has completed its review of Vogtle 1 and 2 FSAR for Sections 4.5.1,'4.5.2, 5.2.3, 5.3.1 (Materials & Fabrication), 5.4.2.1, 6.1.1, and 10.3.6.
This review was conducted in accordance with the applicable sections of the July 1981 edition of the " Standard Review Plan for the Review of Safety Analysis Reports for Nuclear Power Plants,"
(SRP,NUREG-0800).
The questions generated as a result of this review are attached.
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Materials Engineering Branch Division of Engineering
Attachment:
As stated cc:
See Page 2 i
Contact:
D. Smith x-24553 so70c w. 3
MAY 171984 Elinor Adensam
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R. Vollmer D. Eisenhat T. Novak W. Johnston M. Miller E. Sullivan S. Pawlicki B. D. Liaw C. Cheng W. Hazelton R. Klecker D. E. Smith m
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ATTACHMENT V0GTLE UNITS 1 AND 2 QUESTIONS FOR SECTIONS 4.5.1, 4.5.2, 5.2.3, 5.3.1 (MATERIALS & FABRICATION),
5.4.2.1, 6.1.1, AND 10.3.6 MATERIALS APPLICATION SECTION MATERIALS ENGINEERING BRANCH
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252.1 ' Verify that there is a maximum yield strength limit of 90,000 psi for austenitic stainless steel components in the control rod drive mechanisms.
252.2 Provide the technical basis for using measurement by magnetic gage of ferrite of weld wire to determine the ferrite number.
The referenced WACP establishes only chemistry of the weld wire for determining the
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ferrite number.
j g.J 252.3 Verify whether the electroslag welding process is used only in the fabrication of components in the reactor coolant pressure boundary, or also the reactor vessel.
252.4 High heat input weld cladding is recommended not to be used in Regulatory Guide 1.43, " Control of Stainless Steel Weld Cladding of Low-Alloy Steel Components," Regulatory Position C2.
Even though a high heat input weld procedure has been qualified, there is always the possibility that underclad cracking has occurred with SA-508 Class 2, non-fine grained steel.
Indicate what inspections have been performed o'n fabricated and post weld heat treated vessels to assure that this type
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flaw is within acceptable criteria.
r 252.5 Tables 6.1.1-1 and 6.1.1-2 of the FSAR list several non-Code specifications for materials used in engineered safety feature components.
Provide the justification for using non-Code materials in ASME classed systems.
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