ML20036A095
| ML20036A095 | |
| Person / Time | |
|---|---|
| Site: | 05200001 |
| Issue date: | 04/28/1993 |
| From: | Fox J GENERAL ELECTRIC CO. |
| To: | Poslusny C Office of Nuclear Reactor Regulation |
| References | |
| RTR-NUREG-0313, RTR-NUREG-313 NUDOCS 9305100038 | |
| Download: ML20036A095 (2) | |
Text
_ _ _ _ _ _ _ - -.
- X-GE NucIcar Energy e
o Genero![ht tnc Compair U5 Cur:rer Aeeue San Jow CA 9512E April 28,1993 Docket No. STN 52-001 Chet Poslusny, Senior Project Manager Standardization Project Directorate Associate Directorate for Advanced Reactors and License Renewal Office of the Nuclear Reactor Regulation
Subject:
Submittal Supporting Accelerated ABWR Review Schedule - NUREG-03131 (Revision 2)
Dear Chet:
Enclosed is a SSAR markup adding Revision 2 to NUREG-0313. This revision was inadvertently removed on Amendment 15.
Please provide a copy of this transmittal to George Georgie'.v Sincerely, kk Jack Fox Advanced Reactor Programs cc: Norman Fletcher (DOE) h O
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.[j imposed by the guide were satisfied by the ASME with the guide lines of NUREG-0313 to avoid l
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significant sensitization j
Code.
l Wrought tubular products are supplied in Process controls are exercised during all stages i
accordance with applicable ASTM /ASME material of component manufacturing and construction to j
specifications. Additionally, the specification minimize contaminants. Cleanliness controls are
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for the tubular products used for CRD housings applied prior to any elevated temperature treatment.
specified ultrasonic examination to paragraph For applications where stainless steel surfaces are j
NB-2550 of ASME Code Section III.
exposed to water at temperatures ebove 93 C low carbon (<0.03%) grade materials are used. For l
j These RCPB components meet 10CFR50 Appendix B critical applica-tions, nuclear grade materials i
requirements and the ASME Code requirements thus (carbon content.<.;. 0.02%) are used. l All material assuring adequate control of quality for the are supplied in the solution heat treated condition.
- 2 Special sensitization tests are applied.to assure N
l products.
that the material is in the annealed condition.
j 5.233.4 Moisture Centrol for Imw Hydrogen, f
Covered Art Welding Electrodes During fabrication, any henging operation (except l
welding) between 427 - 982 C are avoided, unless Suitable identification, storage, and handling followed by solution heat treatment. 'During welding, j
of electrodes, flux, and other welding material; _ heat input is controlled.~ The interpass temperature i
will be maintained. Precautions shall be taken. is also controlled. Where practical, shop welds are to minimize absorption of moisture by electrodes solution heat treated. In general, weld filler j
i material used for austenitic stainless steel base l
and flux.
metals is Type 308L/316L/309L with an average of 8%
I (of Fn) ferrite en= tent i
1 5.2.3A.1.2 Process Controls to Minimise Exposare to Canta==I===*=
i I
Exposure to contaminants capable of causing stress / corrosion cracking of austenitic stainless l j
steel components was avoided by carefully con all cleaning and processing materials which' contact the stainless steel during manufacture, construction, and installation.
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Special care was exercised to insure removal of
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surf ace containinants prior to any heating l
operations. _ Water quality for cleaning, rinsing, j
5.2.3A Fabrication and L- -- -- * ; of i
Austenitic Stainless Steels flushing, and testing was controlled and monitored.
Suitable protective packaging was provided for j
components to maintain cleanliness during shipping i
5.2.3A.1 Avoidance ef Stress / Corrosion Cracking and storage.
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5.2.3A.1.1 Avoidance of Signincant The degree of surface cleanliness obtained by these procedures meets the requirements of Regulatory Sensitization a
Guides 1.37 and 1A4.
When austenitic stainless steels gre heated in 982 C, they arc l2 the temperature range 427 o
considered to become "sent!tized* or susceptible l-to intergranular corrosion. The ABWR design N
complies with Regulatory Guide 1.44 and e
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5.2-14 1
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