ML19345A444
| ML19345A444 | |
| Person / Time | |
|---|---|
| Site: | Yankee Rowe |
| Issue date: | 02/07/1975 |
| From: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Andognini G YANKEE ATOMIC ELECTRIC CO. |
| References | |
| NUDOCS 8011210556 | |
| Download: ML19345A444 (1) | |
Text
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- o URITED ST ATts' NUCLEAR REGULATORY COBiMISSION
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REGION 1 f
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KING OF P R USSI A. PENPe%YLV ANI A 19406 f -
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i Yankee Atomic Electric Company Docket No. 50-29
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Attention:
G. Carl Andognini Assistant to Vice Fresident
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20 Turnpike Road t
k'estborough, IM 01581 t
Genticten:
Enclosed is IE Bulletin 75-01A which is forwarded to you for informa-tion. No action is required of you if you do not have boiling water reactor with operating license.
F Should you have questions regarchg this Bulletin, please contact this g
office.
Sincerely, F
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Jancs P. O'Reilly k
Director
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Enclosure:
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H. Autio, Plant Superintendent
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Donald- {;. Allen, President 7
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a Inrpection and Enforcement Bulletin 75-01A 7
February 7, 1975
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TilROUGil-WALL CRACRS IN CORE SPRAY PIPING AT DRESDEN;2 IE BULLETIN NO. 75-01, DATED 1/30/75)
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~(REFERE5CE:
The purpose of this bulletin is to confirm the understanding 9
given verbally to BWR licensees regarding acceptable methods 2
C of implementing IE Bulletin 75-01.
J Volumetric examinations of those welds specified in IE Bulletin 1.
No. 75-01 should cover a distance of approximately six times the
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pipe wall thickness (but not less than 2 inches, and need not O
exceed 8 inches) each side of the weld.
Ultrasonic examinations of welds between" piping and cast components (valves, pump bodies, etc.) may be conducted from the pipe side of the wald, but should be conducted such that the ultrasonic beam fully penetrates the veld and heat affected zone of the cast component.
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Ultrasonic or other volumetric examinations within the areas defined 2.
in 1., above, shall, as a minimum, be consistent with the procedures
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licensees have used previously during the conduct of baseline and/or inservice inspections.
Where necessary for evaluation or confirmation of ultrasonic indications, supplementary exanination techniques shall be used.
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The bulletin does not require examination of reactor coolant pressure 3.
boundary welds in austenitic stainless steel piping 2 inches nominal pipe size and smaller or pipe welds in material other than austenitic This does not exclude the required examination of the I
stainless steel.
'X, core spray nozzle to safe-end welds.
If a specified system has two or more branch piping runs lM 4.
which are substantially the same (size, length, complexity,
' t etc.) select for examination, two welds from one of the Where branches are not substantially the same branches.
(e.g., dif fer in pipe size complexity or length), select
- 9 for examination two welds from each branch.
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