ML20028F870
| ML20028F870 | |
| Person / Time | |
|---|---|
| Site: | Susquehanna  |
| Issue date: | 07/06/1981 |
| From: | Halapatz J Office of Nuclear Reactor Regulation |
| To: | Vollmer R Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20027A667 | List: |
| References | |
| NUDOCS 8302040541 | |
| Download: ML20028F870 (2) | |
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MEMORANDUM FOR: Richard H. Vollmer, Director Division of Engineering l
FROM:
Joseph Halapatz Materials Engineering Branch, DE l
SUBJECT:
DIFFERING PROFESSIONAL OPINION RELATED TO SENSITIZATION OF BWR STAINLESS STEEL WELDMENTS l
This memorandum outlines plans for developing definitive information to characterize metallurgically the propensity for IGSCC of BWR austenitic l
stainless steel weldments. The plans are submitted in compliance with i
the Memorandum, Vollmer to Halapatz, dated June 26, 1981.
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The definitive information will be deve' loped from the review of General @
Electric weld procedures used to weld components not addressed by NUREG-l 0313, such as reactor internals and potential non-conforming material, l
the replacement of which would likely result in undue hardship.
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The purpose of the review is to identify potential problem weidments, 1.e., those fabricated using high weld heat inputs, for which inservice j
surveillance would be in order.
l Within this context, the weld procedures which will be reviewed, will include those used in the fabrication of reactor internals 1.
Core Plate 2.
Top Guide 3.
Steam Separator Assembly l
4.
Steam Dryer Assembly l
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Core Spray Line 6.
Feedwater Sparger
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Core Shroud j
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Control Rod Guide Tube Assembly l
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Core Spray Sparger
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Jet Pump Assemblies 11.
Orificed Fuel Supports e
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Weld Fabricated Non-Code Reactor Internals r
Other weld procedures which will be reviewed will include those used in the fabrication of installed large diameter pipe and cc,r. crete embddded flued heads, the replacement of which would likely result in "n fue hardship.
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Findings developed from the review will consider the metallurgical [
l characterization of the weldments of interest with respect to propensity to IGSCC and the consequences of failure in establishing an assessment l
of overall safety significance.
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cB302040541 820720 PDR ADOCK 05000387 P
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Richard H. Vollmer It is recommended that the review be performed jointly with a cognizant GE core design and a materials / welding engineer.
It is estimated that the review can be performed most expeditiously in a two-day meeting with these personnel at GE-San Jose, where the required documente. tion is available.
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e ph Halapatz Materials Engineering Branch Division of Engineering,
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W. Johnston S. Pawlicki G. Johnson W. Hazelton e
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