ML19319A661
| ML19319A661 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 05/23/1977 |
| From: | Schwencer A Office of Nuclear Reactor Regulation |
| To: | Parker W DUKE POWER CO. |
| References | |
| NUDOCS 7911210591 | |
| Download: ML19319A661 (4) | |
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Docket Nos. 5 252/270/237z-s -
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' 2 3, Duke Power Company gj.f 7 T
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s ATTH: Mr. William 0.. Parker, Jr. ~~
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u OCONEk N.UC(EAR STATI'bN, bHIT.NOS; 1, 2 & 3
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Our review of' data received'from &..
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damage than originally.-anticipated. 'In addition, some reactor vesselsi e ;u incorporate more than one~ heat of caterials, including weld metals in
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their beltline regions, but all.of these heats may not be included in ~
P the reactor-vessel material surveillance program.,
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regarding continued reactor; vessel integrity over the.next several.
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years, the information does indicate the' need'for a detailed review
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of this. recent ' data); an.dia review of.the specimens. employedLinLthe>
~4 surveillarce program to'detemine if the-present specimens reasonably '
represent the limiting..materialsTin' theireactor vessel; beltline region..
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In order to perfom these reviews we will'~need the information '
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V" and, associated survei.llance specimens.. t.K i, T t. -
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Accordingly, you are requestedito~s'upply one signed l original and 39
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O. Box 2178 422 South Churc Charlotte, Norgy g,t J. Michael McGarry DeBevoise & Liberm 8 700 Shoreham B Washington, D. 200@ Oconee Public Libr Walhalla. Sou l
t. s. REQUEST FOR INFORMATION REACTOR VESSEL MATERIAL SURVEILLANCE PROGRAM 1. Provide the estimated maximum fluence (E 1 Mev) at the inner surface of the reactor vessel wall as of March 31, 1977. 2. Provide the effective full power years (EFPY) of operation accumulated as of March 31, 1977. 3. Identify the firm or firms that fabricated your reactor vessel. 4. a. Provide a sketch of the reactor vessel showing all materials welds, in the beltline region
- and provide an identification number for each material.
b. Provide the following information for each of the welds in the beltline region: (1) Shop control number or procedure qualification number; (2) Filler metal and heat number; (3) Type of flux and batch number; (4) Welding process (sub arc, electroslag, manual metal arc, etc.) (5) Post-weld heat treatment; (6) Chemical composition (particularly Cu, P and S content); (7) Drop weight TNDT; (8) RTNDTI (9) Charpy upper shelf energy (unirradiated); (10) Tensile properties (unirradiated); (11) Firm performing weld if more than one firm participated in welding; (12) The maximum end-of-life fluence at the vessel inner wall. As defined in 10 CFR 50, Appendix G, Section II.H. .}}