ML021300499
| ML021300499 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 04/25/2002 |
| From: | Sharon Bennett Entergy Operations |
| To: | Alexion T, Russ Bywater, Hamilton J, Krupa M, Robert Lewis, Miller D, Laura Smith Entergy Operations, Office of Nuclear Reactor Regulation |
| References | |
| Download: ML021300499 (6) | |
Text
x Thomas Alexion - Information for NRC Call on ANO-2 Head Inspection From:
"BENNETT, STEVE A" <SBENNE2@entergy.com>
To:
"'Tom Alexion"' <twa@nrc.gov>, "'Linda Smith"' <Ijs@nrc.gov>, "BYWATER, RUSSELL"
<RBYWA90@entergy.com>, "HAMILTON, JOHN R" <JHAMIL2@entergy.com>, "LEWIS, RAYMOND S"
<RLEWIS1 @entergy.com>, "MILLER, D BRYAN" <dmiIl4@entergy.com>, "KRUPA, MICHAEL A"
<MKRUPA@ entergy.com>
Date:
4/25/02 12:50PM
Subject:
Information for NRC Call on ANO-2 Head Inspection Tom/Linda/Russ, Attached is some information that we will talk from on the 1:30 EST (12:30 CDT) call today on the ANO-2 Head Inspection Attachment 6
Pagei-1
ANO-2 RV Head Inspection Summary for 2R15 Inspection Plan Westinghouse performed the RV head inspection under their procedures with the oversight of ANO Engineering and Quality Control NDE specialists.
"* The CEDM (81) inspection plan included the use of both a "demonstrated" eddy current and a UT probe which included the area 1.5 inches above the J-weld to the inspectible extent of the nozzle below the weld.
due to an electrical problem with the eddy current detection circuit, the ECT was not functional during a large portion of the examination.
"* The incore instrument nozzles (8) were similarly inspected using a comparable UT and eddy current probe, but modified for the larger ICI nozzle diameter.
"* The single vent nozzle was inspected by a smaller UT probe.
"* Head penetrations were inspected from above the insulation for boric acid deposits at or around the nozzles and also the flange area (videotaped).
Inspection Results All 90 head penetrations were confirmed to have pressure boundary integrity with no indications of PWSCC cracking and no through wall leaks that could cause head wastage.
" Additional NDE was performed on three CEDMs from under the head (see diagrams)
Nozzle 43 and 59 had J-weld reflections at the low side of the nozzles (-00) that were further inspected by PT and found to have no surface indications found.
Nozzle 30 had indications in the nozzle just above the threading for the CEDM guide cone. An ECT was performed on the OD of the nozzle with no surface indications found.
No signs of leakage were detected above the head on the insulation. Only very minor occasional boric acid staining observed (likely from historical venting).
Follow-up Actions Entergy will provide an NDE demonstration report 30 days after startup from 2R1 5 which provides a summary of the testing performed for confirming the ability to detect flaws in the head penetration nozzles and the nozzle/weld interface.
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Elevation View of UT Reflectors on ANO-2 Nozzles 43 and 59 I
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Information for NRC Call on ANO-2 Head Inspection 4/25/02 12:50PM "BENNETT, STEVE A" <SBENNE2@entergy.com>
SBENNE2 @entergy.com Recipients nrc.gov owf4_po.OWFNDO TWA (Thomas Alexion) nrc.gov ARLPO.ARLDO LJS (Linda Smith) entergy.com MKRUPA (KRUPA, MICHAEL A) dm1114 (MILLER, D BRYAN)
RLEWIS 1 (LEWIS, RAYMOND S)
JHAMIL2 (HAMILTON, JOHN R)
RBYWA90 (BYWATER, RUSSELL)
Post Office owf4_po.OWFNDO ARLPO.ARLDO Files Size MESSAGE 139 ANO-2 VHP Conf Call Notes.doc Mime.822 240783 Options Expiration Date:
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Route nrc.gov nrc.gov entergy.com Date & Time 04/25/02 12:50PM 174592 None Standard No None No Standard